/* Design System & Core Styles */
:root {
  --drawing-bond-color: #1e1e2e;
  --drawing-bond-width: 2.2px;
  --drawing-double-width: 1.8px;
  --drawing-triple-width: 1.5px;
  --drawing-label-size: 15px;
  --drawing-label-font: var(--font-sans);
  --drawing-label-color: #1e1e2e;
  --drawing-label-o: #dc2626;
  --drawing-label-n: #2563eb;
  --drawing-label-s: #d97706;
  --drawing-label-p: #9333ea;
  --drawing-label-halogen: #059669;
  --drawing-label-br: #ea580c;
  --drawing-label-i: #7c3aed;
  --drawing-label-h: #374151;
  --bg-main: #f0f2f5;
  --bg-panel: rgba(255, 255, 255, 0.88);
  --bg-panel-hover: rgba(245, 247, 250, 0.95);
  --bg-canvas: #ffffff;
  --border-color: rgba(0, 0, 0, 0.1);
  --border-color-active: rgba(79, 70, 229, 0.5);
  --text-primary: #1e1e2e;
  --text-muted: #6b7280;
  --text-dark: #1f2937;
  --color-accent: #4f46e5; /* Indigo */
  --color-accent-hover: #4338ca;
  --color-danger: #ef4444;
  --color-success: #10b981;
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.07);
  --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.05);
  --radius-lg: 16px;
  --radius-md: 8px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans JP", sans-serif;
}

.local-icon {
  width: 18px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  font-family: "Segoe UI Symbol", "Noto Sans Symbols", sans-serif;
  font-size: 16px;
  font-style: normal;
  font-weight: 700;
  line-height: 1;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}

/* Keep assistive text available to screen readers without affecting layout. */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  clip-path: inset(50%) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.hidden-file-input {
  display: none !important;
}

button:focus-visible,
input:focus-visible,
textarea:focus-visible,
.draw-canvas:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid rgba(79, 70, 229, 0.55);
  outline-offset: 3px;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

input,
textarea {
  user-select: text;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* App Header */
header {
  height: 60px;
  background: var(--bg-panel);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 10;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  position: relative;
  background: linear-gradient(145deg, #4338ca 0%, #6366f1 48%, #a855f7 100%);
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 7px 16px rgba(79, 70, 229, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.28);
  overflow: hidden;
}

.logo-icon::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 24px;
  top: -9px;
  right: -7px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
}

.logo-icon svg {
  width: 31px;
  height: 31px;
  position: relative;
  z-index: 1;
  overflow: visible;
}

.logo-icon .logo-ring {
  fill: none;
  stroke: rgba(255, 255, 255, 0.46);
  stroke-width: 1.4;
}

.logo-icon .logo-v {
  fill: none;
  stroke: #fff;
  stroke-width: 3.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.logo-icon circle {
  fill: #fff;
  stroke: rgba(67, 56, 202, 0.45);
  stroke-width: 0.8;
}

.logo-text {
  font-size: 1.28rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.logo-valen {
  color: #1e1e2e;
}

.logo-glyph {
  background: linear-gradient(100deg, #4f46e5, #9333ea);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: #4f46e5;
}

.version-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 12px;
  background: rgba(79, 70, 229, 0.1);
  color: var(--color-accent);
  border: 1px solid rgba(79, 70, 229, 0.2);
  margin-left: 4px;
}

.actions-area {
  display: flex;
  flex: 1;
  min-width: 0;
  align-items: center;
  gap: 12px;
  justify-content: flex-end;
  overflow: visible;
  padding: 4px 0;
}

.action-divider {
  flex: 0 0 1px;
  width: 1px;
  height: 24px;
  margin: 0 4px;
  background: var(--border-color);
}

.action-menu {
  position: relative;
  flex: 0 0 auto;
}

.action-menu > summary {
  list-style: none;
  user-select: none;
}

.action-menu > summary::-webkit-details-marker {
  display: none;
}

.action-menu[open] > summary {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.12);
}

.menu-chevron {
  font-size: 0.78rem;
  transition: transform 0.15s ease;
}

.action-menu[open] .menu-chevron {
  transform: rotate(180deg);
}

.action-menu-panel {
  position: absolute;
  top: calc(100% + 9px);
  left: 0;
  z-index: 100;
  display: grid;
  gap: 6px;
  width: max-content;
  min-width: 235px;
  max-width: min(320px, calc(100vw - 16px));
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-lg);
}

.action-menu-panel-right {
  right: 0;
  left: auto;
}

.action-menu-panel .btn {
  width: 100%;
  justify-content: flex-start;
  border-color: transparent;
  background: transparent;
  text-align: left;
}

.action-menu-panel .btn:hover,
.action-menu-panel .btn:focus-visible {
  background: rgba(79, 70, 229, 0.08);
  border-color: rgba(79, 70, 229, 0.16);
}

.action-menu-panel .btn.active {
  color: var(--color-accent);
  border-color: var(--border-color-active);
  background: rgba(79, 70, 229, 0.1);
}

.action-menu-panel .btn-danger {
  color: #b91c1c;
}

.menu-separator {
  height: 1px;
  margin: 5px 8px;
  background: var(--border-color);
}

.header-history-btn {
  width: 36px;
  min-width: 36px;
  padding: 8px;
}

.shortcut-hint {
  margin-left: auto;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 500;
}

.btn {
  flex: 0 0 auto;
  background: rgba(0, 0, 0, 0.04);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 8px 16px;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.btn:hover {
  background: rgba(0, 0, 0, 0.08);
  border-color: var(--text-muted);
}

.btn-primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: white;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.btn-icon-only {
  padding: 8px;
  border-radius: var(--radius-md);
}

/* App Main Body */
.app-container {
  flex: 1;
  display: flex;
  position: relative;
  overflow: hidden;
}

/* Floating Panels */
.floating-toolbar {
  position: absolute;
  top: 20px;
  left: 20px;
  max-height: calc(100% - 40px);
  overflow-y: auto;
  overflow-x: hidden;
  background: var(--bg-panel);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 10px;
  display: grid;
  grid-template-columns: repeat(2, 44px);
  grid-auto-flow: row;
  gap: 8px;
  box-shadow: var(--shadow-lg);
  z-index: 5;
  scrollbar-width: thin;
  scrollbar-color: rgba(0, 0, 0, 0.2) transparent;
}

.floating-toolbar::-webkit-scrollbar {
  width: 3px;
}

.floating-toolbar::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 4px;
}

.tool-category {
  grid-column: 1 / -1;
  min-width: 96px;
}

.tool-category > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 27px;
  padding: 4px 6px;
  border-radius: 6px;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  list-style: none;
  user-select: none;
}

.tool-category > summary::-webkit-details-marker { display: none; }
.tool-category > summary:hover,
.tool-category > summary:focus-visible { background: rgba(99, 102, 241, 0.1); color: var(--color-accent); outline: none; }
.tool-category-chevron { transition: transform 0.18s ease; }
.tool-category:not([open]) .tool-category-chevron { transform: rotate(-90deg); }

.tool-category-content {
  display: grid;
  grid-template-columns: repeat(2, 44px);
  gap: 8px;
  padding-top: 6px;
}

.tool-group-label {
  grid-column: 1 / -1;
  padding: 6px 2px 2px;
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 700;
}

.tool-category + .tool-category {
  margin-top: 2px;
  padding-top: 4px;
  border-top: 1px solid var(--border-color);
}

.floating-sidebar {
  position: absolute;
  top: 16px;
  right: 16px;
  max-height: calc(100% - 32px);
  overflow-y: auto;
  overflow-x: hidden;
  background: var(--bg-panel);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 10px 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: var(--shadow-lg);
  width: 96px;
  z-index: 5;
  scrollbar-width: thin;
  scrollbar-color: rgba(0, 0, 0, 0.2) transparent;
}

.floating-sidebar::-webkit-scrollbar {
  width: 3px;
}

.floating-sidebar::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 4px;
}

.property-panel {
  position: absolute;
  top: 16px;
  right: 128px;
  width: 220px;
  padding: 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.97);
  box-shadow: var(--shadow-lg);
  z-index: 6;
}

.property-panel[hidden] { display: none; }
.property-error { margin: 0 0 10px; padding: 8px 10px; border: 1px solid #fca5a5; border-radius: 7px; background: #fef2f2; color: #991b1b; font-size: 0.78rem; line-height: 1.45; }
.property-error[hidden] { display: none; }
.property-panel [aria-invalid="true"] { border-color: #dc2626; box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.14); }
.property-panel-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.property-close { border: 0; background: transparent; color: var(--text-muted); cursor: pointer; font-size: 1.2rem; }
.property-field { display: grid; grid-template-columns: 78px 1fr; align-items: center; gap: 8px; margin-bottom: 9px; color: var(--text-muted); font-size: 0.78rem; }
.property-field input,
.property-field select { width: 100%; min-width: 0; padding: 7px; border: 1px solid var(--border-color); border-radius: 7px; background: white; color: var(--text-primary); }
.property-field input[type="color"] { height: 34px; padding: 3px; }
.property-check { display: flex; align-items: center; gap: 7px; margin: 9px 0; font-size: 0.78rem; color: var(--text-primary); }
.property-note { margin: 8px 0; color: var(--text-muted); font-size: 0.75rem; line-height: 1.5; }
.property-apply { width: 100%; justify-content: center; margin-top: 12px; }

/* Tool Buttons */
.tool-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.tool-btn:hover {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-primary);
}

.tool-btn.active {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--border-color-active);
  color: var(--color-accent);
}

/* Tooltip */
.tool-btn[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  left: 110%;
  top: 50%;
  transform: translateY(-50%) translateX(5px);
  background: #374151;
  color: #f9fafb;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all 0.15s ease;
  pointer-events: none;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.15);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.floating-sidebar .tool-btn[data-tooltip]::after {
  left: auto;
  right: 110%;
  transform: translateY(-50%) translateX(-5px);
}

.tool-btn[data-tooltip]:hover::after,
.tool-btn[data-tooltip]:focus-visible::after {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
}

.floating-toolbar .tool-btn[data-tooltip]::after { display: none; }

.toolbar-tooltip {
  position: fixed;
  z-index: 1000;
  max-width: min(340px, calc(100vw - 20px));
  padding: 8px 11px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 7px;
  background: #111827;
  color: #fff;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.3);
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.4;
  white-space: normal;
  pointer-events: none;
}

.toolbar-tooltip[hidden] { display: none; }
.heterocycle-tool text { fill: currentColor; font-size: 6px; font-weight: 700; }

.mobile-tool-help { display: none; }
.mobile-elements-toggle,
.mobile-sidebar-header { display: none; }

.template-modal-container {
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  width: min(760px, 100%);
  max-width: 760px;
  max-height: calc(100vh - 24px);
  max-height: calc(100dvh - 24px);
  overflow: hidden;
}
#template-modal { box-sizing: border-box; padding: 12px; }
.template-modal-container .modal-header,
.template-modal-container .modal-footer { flex: 0 0 auto; }
.template-modal-container .modal-body {
  flex: 1 1 auto;
  min-width: 0;
  min-height: 0;
  margin-bottom: 12px;
  padding-right: 5px;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
}
#template-library-sections { min-width: 0; }
.template-library-help { margin: 0 0 14px; color: var(--text-muted); font-size: 0.86rem; }
#changelog-modal { box-sizing: border-box; padding: 12px; }
.changelog-modal-container { display: flex; flex-direction: column; width: min(760px, 100%); max-width: 760px; max-height: calc(100vh - 24px); max-height: calc(100dvh - 24px); padding: clamp(14px, 2.5vw, 24px); overflow: hidden; box-sizing: border-box; }
.changelog-modal-container .modal-header, .changelog-modal-container .modal-footer { flex: 0 0 auto; }
.changelog-modal-container .modal-body { flex: 1 1 auto; min-height: 0; margin-bottom: 12px; padding-right: 5px; overflow-y: auto; overscroll-behavior: contain; }
.changelog-modal-container .modal-footer { padding-top: 2px; background: var(--bg-panel); }
.changelog-intro { margin: 0 0 14px; color: var(--text-secondary); line-height: 1.6; }
.changelog-list { display: grid; gap: 10px; }
.changelog-release { padding: 12px 14px; border: 1px solid var(--border-color); border-radius: 9px; background: #fff; }
.changelog-release.is-unreleased { border-color: #93c5fd; background: #eff6ff; }
.changelog-release h3 { display: flex; align-items: baseline; gap: 10px; margin: 0 0 7px; font-size: .92rem; }
.changelog-version { min-width: 62px; color: var(--primary); font-variant-numeric: tabular-nums; }
.changelog-release ul { margin: 0; padding-left: 20px; color: var(--text-secondary); font-size: .8rem; line-height: 1.55; }
.template-section + .template-section { margin-top: 18px; }
.template-section h3 { margin: 0 0 8px; color: var(--text-primary); font-size: 0.9rem; }
.template-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 9px; }
.template-card {
  box-sizing: border-box;
  min-width: 0;
  min-height: 112px;
  padding: 10px 8px;
  border: 1px solid var(--border-color);
  border-radius: 9px;
  background: #fff;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}
.template-card:hover,
.template-card:focus-visible { border-color: var(--border-color-active); background: rgba(99, 102, 241, 0.07); outline: none; transform: translateY(-1px); }
.template-card.active { border-color: var(--color-accent); background: rgba(99, 102, 241, 0.12); }
.template-preview { min-height: 42px; color: var(--color-accent); font-family: Arial, sans-serif; font-size: 2rem; line-height: 1.1; }
.template-preview-svg { display: block; width: 84px; height: 58px; color: var(--color-accent); overflow: visible; }
.template-preview-bond { stroke: currentColor; stroke-width: 2; stroke-linecap: round; vector-effect: non-scaling-stroke; }
.template-preview-atom { fill: currentColor; stroke: #fff; stroke-width: 4px; paint-order: stroke fill; font: 700 13px Arial, sans-serif; text-anchor: middle; dominant-baseline: central; }
.template-card strong { max-width: 100%; font-size: 0.82rem; overflow-wrap: anywhere; }
.template-card small { max-width: 100%; color: var(--text-muted); font-size: 0.7rem; overflow-wrap: anywhere; }

@media (max-width: 520px) {
  .template-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .template-card { min-height: 104px; padding: 8px 5px; }
  .template-preview-svg { width: 72px; height: 50px; }
}

@media (max-width: 350px) {
  .template-grid { grid-template-columns: 1fr; }
}

/* Divider in toolbar */
.divider {
  grid-column: 1 / -1;
  height: 1px;
  background: var(--border-color);
  margin: 4px 0;
}

.sidebar-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  text-align: center;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 6px;
  margin-bottom: 4px;
}

.sidebar-section {
  width: 100%;
  border-top: 1px solid var(--border-color);
}

.sidebar-section > summary {
  display: flex;
  min-height: 30px;
  align-items: center;
  justify-content: space-between;
  padding: 5px 2px;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.7rem;
  font-weight: 700;
  list-style: none;
}

.sidebar-section > summary::-webkit-details-marker { display: none; }
.sidebar-section > summary::after {
  content: '›';
  margin-left: 4px;
  font-size: 1rem;
  transition: transform 0.18s ease;
}
.sidebar-section[open] > summary::after { transform: rotate(90deg); }
.sidebar-section[open] > summary { color: var(--text-primary); }
.sidebar-section .abbreviation-grid,
.sidebar-section .custom-element-area,
.sidebar-section .color-picker-area { margin-top: 4px; }

.element-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 4px;
}

.substituent-title { margin-top: 4px; }
.abbreviation-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 4px; }
.abbreviation-btn {
  min-width: 36px;
  height: 32px;
  padding: 0 3px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.75);
  color: var(--text-primary);
  cursor: pointer;
  font-size: 0.68rem;
  font-weight: 700;
}
.abbreviation-btn:hover { border-color: var(--border-color-active); background: rgba(99, 102, 241, 0.08); }
.abbreviation-btn.active { color: var(--color-accent); border-color: var(--border-color-active); background: rgba(99, 102, 241, 0.15); }

.element-btn {
  width: 36px;
  height: 34px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: rgba(0, 0, 0, 0.03);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.element-btn:hover {
  background: rgba(0, 0, 0, 0.07);
  border-color: var(--text-muted);
}

.element-btn.active {
  background: linear-gradient(135deg, var(--color-accent), #a855f7);
  border-color: transparent;
  color: white;
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.4);
}

/* Custom element input */
.custom-element-area {
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-top: 1px solid var(--border-color);
  padding-top: 8px;
}

.custom-element-input {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.04);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.custom-element-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

.custom-element-input.active-custom {
  background: linear-gradient(135deg, var(--color-accent), #a855f7);
  color: white;
  border-color: transparent;
  box-shadow: 0 0 12px rgba(99, 102, 241, 0.4);
}

/* Main Draw Canvas */
.canvas-wrapper {
  flex: 1;
  height: 100%;
  position: relative;
  background-color: var(--bg-canvas);
}

.layout-controls {
  position: absolute;
  z-index: 7;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: calc(100% - 420px);
  padding: 7px 9px;
  border: 1px solid rgba(79, 70, 229, 0.2);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 8px 24px rgba(30, 30, 46, 0.12);
  backdrop-filter: blur(10px);
  white-space: nowrap;
}

.layout-controls button,
.layout-controls select,
.layout-controls input {
  min-height: 34px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: #fff;
  color: var(--text-primary);
  font: inherit;
  font-size: 0.82rem;
}

.layout-controls button { padding: 0 10px; font-weight: 700; cursor: pointer; }
.layout-controls button:hover { border-color: var(--color-accent); color: var(--color-accent); }
.layout-control-primary { background: var(--color-accent) !important; color: #fff !important; border-color: var(--color-accent) !important; }
.mobile-layout-toggle { display: none; }
.angle-control { display: flex; align-items: center; gap: 5px; }
.angle-control label { font-size: 0.82rem; font-weight: 700; }
.angle-control select { padding: 0 6px; }
.angle-control input { width: 62px; padding: 0 6px; text-align: right; }
.layout-control-help { color: var(--text-muted); font-size: 0.72rem; }

.draw-canvas {
  width: 100%;
  height: 100%;
  display: block;
  cursor: crosshair;
  cursor: url("draw-cursor.svg") 16 16, crosshair;
  background-image: radial-gradient(rgba(0, 0, 0, 0.08) 1px, transparent 1px);
  background-size: 24px 24px;
  touch-action: none;
}

.draw-canvas.mode-select {
  cursor: default;
}
.draw-canvas.mode-erase {
  cursor: cell;
}
.draw-canvas.mode-charge {
  cursor: crosshair;
}

.draw-canvas.mode-charge-plus {
  cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='36' height='36' viewBox='0 0 36 36'%3E%3Cline x1='10' y1='2' x2='10' y2='18' stroke='%231e1e2e' stroke-width='2'/%3E%3Cline x1='2' y1='10' x2='18' y2='10' stroke='%231e1e2e' stroke-width='2'/%3E%3Ccircle cx='25' cy='25' r='9' fill='white' stroke='%23dc2626' stroke-width='2'/%3E%3Cline x1='25' y1='20' x2='25' y2='30' stroke='%23dc2626' stroke-width='2.5'/%3E%3Cline x1='20' y1='25' x2='30' y2='25' stroke='%23dc2626' stroke-width='2.5'/%3E%3C/svg%3E") 10 10, crosshair;
}

.draw-canvas.mode-charge-minus {
  cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='36' height='36' viewBox='0 0 36 36'%3E%3Cline x1='10' y1='2' x2='10' y2='18' stroke='%231e1e2e' stroke-width='2'/%3E%3Cline x1='2' y1='10' x2='18' y2='10' stroke='%231e1e2e' stroke-width='2'/%3E%3Ccircle cx='25' cy='25' r='9' fill='white' stroke='%232563eb' stroke-width='2'/%3E%3Cline x1='20' y1='25' x2='30' y2='25' stroke='%232563eb' stroke-width='2.5'/%3E%3C/svg%3E") 10 10, crosshair;
}

.draw-canvas.mode-radical {
  cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='36' height='36' viewBox='0 0 36 36'%3E%3Cline x1='10' y1='2' x2='10' y2='18' stroke='%231e1e2e' stroke-width='2'/%3E%3Cline x1='2' y1='10' x2='18' y2='10' stroke='%231e1e2e' stroke-width='2'/%3E%3Ccircle cx='25' cy='25' r='9' fill='white' stroke='%234f46e5' stroke-width='2'/%3E%3Ccircle cx='25' cy='25' r='3.5' fill='%231e1e2e'/%3E%3C/svg%3E") 10 10, crosshair;
}

.draw-canvas.is-pan-ready {
  cursor: grab;
}

.draw-canvas.is-panning {
  cursor: grabbing;
}

.viewport-controls {
  position: absolute;
  right: 126px;
  bottom: 16px;
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 5px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--bg-panel);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-lg);
  z-index: 6;
}

.viewport-btn {
  width: 30px;
  height: 30px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.viewport-btn:hover {
  background: rgba(79, 70, 229, 0.1);
  color: var(--color-accent);
}

.viewport-btn svg {
  width: 16px;
  height: 16px;
}

.zoom-level {
  min-width: 43px;
  text-align: center;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
}

.viewport-divider {
  width: 1px;
  height: 20px;
  margin: 0 2px;
  background: var(--border-color);
}

/* SVG Rendering Styles */
.bond-line {
  stroke: var(--drawing-bond-color);
  stroke-width: var(--drawing-bond-width);
  stroke-linecap: round;
  transition: stroke 0.15s ease, stroke-width 0.15s ease;
}

.bond-hitbox {
  stroke: transparent;
  stroke-width: 12;
  stroke-linecap: round;
  fill: none;
  cursor: pointer;
}

.bond-hitbox:hover + .bond-line {
  stroke: var(--color-accent);
  stroke-width: 3.5;
}

.bond-double-offset {
  stroke: var(--drawing-bond-color);
  stroke-width: var(--drawing-double-width);
}

.bond-triple-center {
  stroke: var(--drawing-bond-color);
  stroke-width: var(--drawing-triple-width);
}

.bond-wedge-solid {
  fill: var(--drawing-bond-color);
  stroke: none;
}

.bond-wedge-hash {
  stroke: var(--drawing-bond-color);
  stroke-width: var(--drawing-triple-width);
  stroke-linecap: round;
  pointer-events: none;
}

.bond-geometry-label {
  fill: #4338ca;
  font-size: 11px;
  font-weight: 800;
  text-anchor: middle;
  dominant-baseline: central;
  paint-order: stroke;
  stroke: #ffffff;
  stroke-width: 3px;
  stroke-linejoin: round;
  pointer-events: none;
}

.atom-node {
  fill: var(--bg-canvas);
  stroke: transparent;
  cursor: pointer;
}

.atom-hitbox {
  fill: transparent;
  cursor: pointer;
}

.atom-hover-circle {
  fill: rgba(79, 70, 229, 0.12);
  stroke: #4f46e5;
  stroke-width: 1.5;
  stroke-dasharray: 3 2;
  pointer-events: none;
  filter: drop-shadow(0 0 4px rgba(79, 70, 229, 0.35));
}

.atom-selected-circle {
  fill: rgba(99, 102, 241, 0.22);
  stroke: #6366f1;
  stroke-width: 2.5;
  pointer-events: none;
  filter: drop-shadow(0 0 6px rgba(99, 102, 241, 0.55));
}

.bond-selected-highlight {
  stroke: rgba(99, 102, 241, 0.45);
  stroke-width: 9;
  stroke-linecap: round;
  pointer-events: none;
  filter: drop-shadow(0 0 4px rgba(99, 102, 241, 0.4));
}

.ring-fusion-target {
  stroke: #f59e0b;
  stroke-width: 11;
  stroke-linecap: round;
  opacity: 0.52;
  pointer-events: none;
  filter: drop-shadow(0 0 5px rgba(245, 158, 11, 0.7));
}

.selection-bounding-box {
  fill: rgba(99, 102, 241, 0.05);
  stroke: #6366f1;
  stroke-width: 1.5;
  stroke-dasharray: 5 3;
  pointer-events: none;
  filter: drop-shadow(0 0 8px rgba(99, 102, 241, 0.25));
}

.selection-rotate-stem {
  stroke: #6366f1;
  stroke-width: 1.5;
  stroke-dasharray: 3 2;
  pointer-events: none;
  vector-effect: non-scaling-stroke;
}

.selection-rotate-handle {
  fill: #ffffff;
  stroke: #4f46e5;
  stroke-width: 3;
  cursor: grab;
  touch-action: none;
  filter: drop-shadow(0 2px 5px rgba(79, 70, 229, 0.35));
  vector-effect: non-scaling-stroke;
}

.selection-rotate-handle:hover {
  fill: #eef2ff;
  stroke-width: 4;
}

.selection-rotate-handle:active {
  cursor: grabbing;
  fill: #c7d2fe;
}

.atom-label {
  font-family: var(--drawing-label-font);
  font-size: var(--drawing-label-size);
  font-weight: bold;
  text-anchor: middle;
  dominant-baseline: central;
  pointer-events: none;
}

.atom-label-C { fill: var(--drawing-label-color); }
.atom-label-O { fill: var(--drawing-label-o); }
.atom-label-N { fill: var(--drawing-label-n); }
.atom-label-S { fill: var(--drawing-label-s); }
.atom-label-P { fill: var(--drawing-label-p); }
.atom-label-F { fill: var(--drawing-label-halogen); }
.atom-label-Cl { fill: var(--drawing-label-halogen); }
.atom-label-Br { fill: var(--drawing-label-br); }
.atom-label-I { fill: var(--drawing-label-i); }
.atom-label-H { fill: var(--drawing-label-h); }
.atom-label-unknown { fill: var(--drawing-label-color); } /* Fallback for any custom element */

.temp-bond {
  stroke: var(--color-accent);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 4 4;
  pointer-events: none;
}

.selection-box {
  fill: rgba(99, 102, 241, 0.05);
  stroke: var(--color-accent);
  stroke-width: 1;
  stroke-dasharray: 3 3;
  pointer-events: none;
}

/* Status Bar */
.status-bar {
  height: 28px;
  background: #e5e7eb;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  font-size: 0.75rem;
  color: var(--text-muted);
  z-index: 10;
  gap: 10px;
  overflow: hidden;
}

.status-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.status-message { flex: 1 1 auto; min-width: 0; overflow: hidden; padding: 3px 8px; border-left: 3px solid #64748b; border-radius: 4px; white-space: nowrap; }
.status-message > i { flex: 0 0 auto; }
#status-text { display: block; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.status-bar > .status-item:last-child { flex: 0 0 auto; white-space: nowrap; }
.status-message[data-tone="info"] { border-left-color: #2563eb; color: #1e3a8a; background: #eff6ff; }
.status-message[data-tone="success"] { border-left-color: #059669; color: #065f46; background: #ecfdf5; }
.status-message[data-tone="warning"] { border-left-color: #d97706; color: #92400e; background: #fffbeb; }
.status-message[data-tone="error"] { border-left-color: #dc2626; color: #991b1b; background: #fef2f2; }

.save-status {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-weight: 600;
  color: #047857;
}

.save-status.is-unsaved {
  color: #b45309;
}

.save-status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  flex: 0 0 auto;
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 100;
}

.modal-overlay.show {
  opacity: 1;
  visibility: visible;
}

.modal-container {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  width: 90%;
  max-width: 500px;
  box-shadow: var(--shadow-lg);
  transform: scale(0.95);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.show .modal-container {
  transform: scale(1);
}

.modal-header {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.25rem;
}

.modal-body {
  margin-bottom: 20px;
}

.app-dialog-overlay { z-index: 1200; }
.app-dialog-container { width: min(460px, calc(100vw - 28px)); }
.app-dialog-message { margin: 0; color: var(--text-primary); line-height: 1.65; white-space: pre-wrap; }
.app-dialog-input { width: 100%; margin-top: 14px; padding: 9px 11px; border: 1px solid var(--border-color); border-radius: 6px; background: var(--bg-primary); color: var(--text-primary); font: inherit; }
.app-dialog-input:focus { border-color: var(--accent-color); outline: 2px solid color-mix(in srgb, var(--accent-color) 24%, transparent); }

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

.ir-modal-container { width: min(820px, calc(100vw - 24px)); max-width: 820px; max-height: calc(100vh - 24px); padding: clamp(12px, 2.5vw, 24px); overflow: hidden; }
.ir-modal-container .modal-body { max-height: calc(100vh - 150px); overflow-y: auto; overflow-x: hidden; padding-right: 4px; }
.spectrum-workspace-nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin: 0 0 12px; padding: 5px; border: 1px solid var(--border-color); border-radius: 12px; background: var(--bg-subtle, #f8fafc); }
.spectrum-workspace-nav-button { display: flex; min-width: 0; min-height: 58px; flex-direction: column; align-items: flex-start; justify-content: center; gap: 2px; padding: 8px 12px; border: 1px solid transparent; border-radius: 9px; background: transparent; color: var(--text-secondary); text-align: left; cursor: pointer; }
.spectrum-workspace-nav-button:hover { background: var(--bg-panel); border-color: var(--border-color); }
.spectrum-workspace-nav-button.is-active { background: var(--bg-panel); border-color: var(--primary-color); color: var(--text-primary); box-shadow: 0 2px 8px rgba(15, 23, 42, .08); }
.spectrum-workspace-nav-button:focus-visible { outline: 3px solid color-mix(in srgb, var(--primary-color) 35%, transparent); outline-offset: 2px; }
.spectrum-workspace-nav-title { font-size: .95rem; font-weight: 700; }
.spectrum-workspace-nav-description { max-width: 100%; overflow: hidden; font-size: .76rem; line-height: 1.3; text-overflow: ellipsis; white-space: nowrap; }
.spectrum-workspace-toolbar { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; margin: -3px 0 12px; padding: 8px; border: 1px solid var(--border-color); border-radius: 10px; background: var(--bg-panel); }
.spectrum-workspace-toolbar .btn { min-height: 34px; padding: 6px 10px; font-size: .78rem; }
.spectrum-workspace-context { margin-right: auto; padding: 0 4px; color: var(--text-secondary); font-size: .8rem; font-weight: 700; }
.spectrum-selected-peak { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: baseline; gap: 4px 10px; margin: 0 0 12px; padding: 9px 12px; border: 1px solid #bfdbfe; border-radius: 10px; background: #eff6ff; color: #1e3a5f; }
.spectrum-selected-peak[data-state="empty"] { border-color: var(--border-color); background: var(--bg-subtle, #f8fafc); color: var(--text-secondary); }
.spectrum-selected-peak > span { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.spectrum-selected-peak dl { grid-column: 1 / -1; display: grid; grid-template-columns: .7fr 1.4fr 2fr; gap: 8px; margin: 4px 0 0; }
.spectrum-selected-peak dl div { min-width: 0; padding-top: 5px; border-top: 1px solid rgba(59, 130, 246, .2); }
.spectrum-selected-peak dt { font-size: .7rem; font-weight: 700; color: var(--text-muted); }
.spectrum-selected-peak dd { margin: 2px 0 0; overflow-wrap: anywhere; font-size: .78rem; }
.spectrum-structure-preview { grid-column: 1 / -1; display: grid; grid-template-columns: minmax(0, 1fr); margin: 4px 0 0; padding: 7px; border: 1px solid rgba(59, 130, 246, .22); border-radius: 8px; background: #fff; }
.spectrum-structure-preview[hidden] { display: none; }
.spectrum-structure-preview svg { display: block; width: 100%; max-height: 170px; }
.spectrum-structure-preview figcaption { margin-top: 3px; color: var(--text-muted); font-size: .72rem; }
.spectrum-structure-preview figcaption span { display: inline-block; width: 24px; margin-right: 5px; border-top: 4px solid #e11d48; vertical-align: middle; }
.spectrum-preview-bond { stroke: #64748b; stroke-width: 2; stroke-linecap: round; }
.spectrum-preview-bond.is-highlighted { stroke: #e11d48; stroke-width: 5; }
.spectrum-preview-atom { fill: #fff; stroke: #94a3b8; stroke-width: 1.5; }
.spectrum-preview-atom.is-highlighted { fill: #ffe4e6; stroke: #e11d48; stroke-width: 3; }
.spectrum-preview-label { fill: #0f172a; font: 700 10px Arial, sans-serif; text-anchor: middle; pointer-events: none; }
.ir-spectrum-peak-marker[role="button"], .raman-fast-stick[role="button"] { cursor: pointer; }
.ir-spectrum-peak-marker.is-selected { stroke: #dc2626; stroke-width: 3; r: 5px; }
.raman-fast-stick.is-selected { stroke: #dc2626; stroke-width: 4; }
#ir-peak-assignments li[role="button"] { cursor: pointer; }
#ir-peak-assignments li.is-selected { border-color: #dc2626; background: #fef2f2; }
.spectrum-structure-highlight { pointer-events: none; }
.spectrum-bond-highlight { stroke: rgba(225, 29, 72, .55); stroke-width: 13; stroke-linecap: round; filter: drop-shadow(0 0 4px rgba(225, 29, 72, .45)); }
.spectrum-atom-highlight { fill: rgba(251, 113, 133, .18); stroke: #e11d48; stroke-width: 2.5; filter: drop-shadow(0 0 5px rgba(225, 29, 72, .5)); }
@media (max-width: 560px) {
  .spectrum-workspace-nav-description { white-space: normal; }
  .spectrum-workspace-toolbar .btn { flex: 1 1 calc(50% - 6px); }
  .spectrum-workspace-context { flex: 1 0 100%; }
  .spectrum-selected-peak { grid-template-columns: 1fr; }
  .spectrum-selected-peak > span, .spectrum-selected-peak dl { grid-column: 1; }
  .spectrum-selected-peak dl { grid-template-columns: 1fr; }
}
.ir-method-note { padding: 10px 12px; margin-bottom: 12px; border-radius: var(--radius-md); background: #fff7ed; color: #9a3412; font-size: 0.86rem; }
.ir-prediction-tabs { position: sticky; top: 0; z-index: 3; display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; margin: 0 0 12px; padding: 4px; border: 1px solid var(--border-color); border-radius: 10px; background: var(--bg-panel); box-shadow: 0 3px 10px rgba(15, 23, 42, 0.08); }

.raman-fast-stick { stroke: #ea580c; stroke-width: 2; opacity: .82; }
.raman-fast-curve { fill: none; stroke: #059669; stroke-width: 2.2; stroke-linejoin: round; stroke-linecap: round; }
.ir-prediction-tab { min-height: 40px; padding: 8px 12px; border: 0; border-radius: 7px; background: transparent; color: var(--text-secondary); font: inherit; font-size: 0.84rem; font-weight: 700; cursor: pointer; }
.ir-prediction-tab:hover { background: rgba(79, 70, 229, 0.08); color: var(--text-primary); }
.ir-prediction-tab.is-active { background: #4f46e5; color: #fff; }
.ir-prediction-tab:focus-visible { outline: 3px solid rgba(79, 70, 229, 0.35); outline-offset: 2px; }
.ir-condition-control { display: grid; grid-template-columns: auto minmax(150px, 220px) 1fr; gap: 8px 10px; align-items: center; margin: 0 0 10px; font-size: 0.78rem; }
.ir-condition-control label { font-weight: 700; }
.ir-condition-control select { min-height: 34px; padding: 5px 8px; border: 1px solid var(--border-color); border-radius: 7px; background: var(--bg-panel); color: var(--text-primary); }
.ir-condition-control span { color: var(--text-muted); }
@media (max-width: 600px) { .ir-condition-control { grid-template-columns: 1fr; } }
.ir-table-wrap { overflow: auto; max-height: 52vh; border: 1px solid var(--border-color); border-radius: var(--radius-md); }
.ir-results-table { width: 100%; min-width: 720px; border-collapse: collapse; font-size: 0.82rem; }
.ir-results-table th, .ir-results-table td { padding: 9px; border-bottom: 1px solid var(--border-color); text-align: left; vertical-align: top; }
.ir-results-table th { position: sticky; top: 0; background: var(--bg-panel); z-index: 1; }
.ir-results-table td:first-child { white-space: nowrap; font-variant-numeric: tabular-nums; font-weight: 700; }
.ir-warnings { margin: 12px 0 0; padding-left: 20px; color: var(--text-muted); font-size: 0.78rem; line-height: 1.5; }
.quantum-ir-panel { margin-top: 18px; padding: 14px; border: 1px solid var(--border-color); border-left: 5px solid #4f46e5; border-radius: var(--radius-md); background: color-mix(in srgb, var(--bg-panel) 94%, #4f46e5 6%); }
.quantum-ir-panel h3, .quantum-ir-panel h4 { margin: 0 0 7px; }
.quantum-ir-panel > p, .quantum-ir-panel > small { color: var(--text-muted); font-size: 0.8rem; line-height: 1.5; }
.quantum-ir-connection { display: grid; grid-template-columns: auto minmax(180px, 1fr); gap: 7px 10px; align-items: center; margin: 12px 0 8px; }
.quantum-ir-connection label { font-size: 0.78rem; font-weight: 700; }
.quantum-ir-connection input { min-width: 0; padding: 8px 9px; border: 1px solid var(--border-color); border-radius: 7px; background: var(--bg-primary); color: var(--text-primary); }
.quantum-ir-connection button { grid-column: 2; justify-self: start; }
.quantum-ir-status { margin: 8px 0; padding: 8px 10px; border-radius: 6px; background: rgba(100, 116, 139, 0.1); font-size: 0.8rem; }
.quantum-ir-availability { margin: 12px 0; padding: 12px 14px; border: 1px solid #cbd5e1; border-radius: 8px; background: #f8fafc; }
.quantum-ir-availability strong { display: block; margin-bottom: 4px; }
.quantum-ir-availability p { margin: 0 0 5px; line-height: 1.55; }
.quantum-ir-availability small { color: var(--text-secondary); line-height: 1.45; }
.quantum-ir-availability.is-available { border-color: #86efac; background: #f0fdf4; color: #166534; }
.quantum-ir-availability.is-unavailable { border-color: #fbbf24; background: #fffbeb; color: #92400e; }
.quantum-ir-availability.is-checking { border-color: #93c5fd; background: #eff6ff; color: #1e40af; }
.quantum-ir-runtime-details { display: grid; gap: 4px; margin: 10px 0 0; padding-top: 8px; border-top: 1px solid currentColor; }
.quantum-ir-runtime-details div { display: grid; grid-template-columns: 7em 1fr; gap: 8px; }
.quantum-ir-runtime-details dt { font-weight: 700; }
.quantum-ir-runtime-details dd { margin: 0; }
.quantum-ir-diagnostics-panel { margin-top: 10px; }
.quantum-ir-diagnostics-panel summary { cursor: pointer; font-weight: 700; }
.quantum-ir-diagnostics-panel ul { margin: 7px 0 0; padding-left: 20px; line-height: 1.55; }
.quantum-ir-diagnostic-actions { display: flex; flex-wrap: wrap; gap: 7px; margin: 10px 0 6px; }
.quantum-ir-status.is-success { background: #dcfce7; color: #166534; }
.quantum-ir-status.is-error { background: #fee2e2; color: #991b1b; }
.quantum-ir-progress-wrap { margin: 10px 0; padding: 11px 12px; border: 1px solid #c4b5fd; border-radius: 8px; background: #f5f3ff; }
.quantum-ir-progress-wrap.is-active { box-shadow: inset 0 0 0 1px rgba(124, 58, 237, 0.08); }
.quantum-ir-progress-heading { display: flex; justify-content: space-between; gap: 12px; color: #4c1d95; font-size: 0.82rem; }
.quantum-ir-progress-heading strong { display: inline-flex; align-items: center; gap: 7px; }
.quantum-ir-activity-dot { width: 9px; height: 9px; border-radius: 50%; background: #94a3b8; }
.quantum-ir-progress-wrap.is-active .quantum-ir-activity-dot { background: #16a34a; animation: quantum-ir-pulse 1.4s ease-in-out infinite; }
@keyframes quantum-ir-pulse { 0%, 100% { opacity: 0.35; transform: scale(0.8); } 50% { opacity: 1; transform: scale(1.25); box-shadow: 0 0 0 5px rgba(22, 163, 74, 0.14); } }
.quantum-ir-progress-wrap progress { width: 100%; height: 14px; margin: 8px 0 4px; accent-color: #7c3aed; }
.quantum-ir-progress-wrap p { margin: 2px 0; color: #4c1d95; font-size: 0.78rem; }
.quantum-ir-progress-wrap small { display: block; color: var(--text-muted); font-variant-numeric: tabular-nums; }
#quantum-ir-heartbeat-status.is-stale { color: #b45309; font-weight: 700; }
.quantum-ir-readiness { margin: 8px 0; padding-left: 21px; font-size: 0.78rem; line-height: 1.5; }
.quantum-ir-readiness .is-warning { color: #a16207; }
.quantum-ir-actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0; }
.quantum-ir-results { min-width: 760px; }
.quantum-ir-results td:nth-child(4) { min-width: 170px; font-weight: 700; }
.quantum-ir-results td:nth-child(5) { min-width: 240px; color: var(--text-secondary); }
.quantum-ir-result-metadata { margin: 0 0 8px; color: var(--text-primary); font-size: 0.8rem; font-weight: 700; }
.quantum-ir-result-heading { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px 12px; margin-bottom: 5px; }
.quantum-ir-result-heading h4 { margin: 0; }
.quantum-ir-result-actions { display: flex; flex-wrap: wrap; gap: 6px; }
.quantum-ir-result-actions .btn { padding: 5px 9px; font-size: 0.75rem; }
.quantum-spectrum-tabs { display: flex; gap: 4px; margin: 12px 0 8px; border-bottom: 1px solid var(--border-color); }
.quantum-spectrum-tab { padding: 7px 14px; border: 1px solid transparent; border-radius: 7px 7px 0 0; background: transparent; color: var(--text-secondary); font-weight: 800; cursor: pointer; }
.quantum-spectrum-tab.is-active { margin-bottom: -1px; border-color: var(--border-color) var(--border-color) #fff; background: #fff; color: var(--primary); }
.quantum-spectrum-tab:disabled { color: var(--text-muted); cursor: not-allowed; opacity: .55; }
.quantum-spectrum-tab:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.quantum-raman-note { margin: 8px 0; padding: 8px 10px; border: 1px solid #fed7aa; border-radius: 7px; background: #fff7ed; color: #9a3412; font-size: .76rem; }
.quantum-raman-results { min-width: 820px; }
.quantum-raman-results tbody tr[role="button"] { cursor: pointer; }
.quantum-raman-results tbody tr[role="button"]:focus-visible { outline: 2px solid #ea580c; outline-offset: -2px; }
.quantum-ir-raman-complementarity { margin: 12px 0; padding: 9px 11px; border: 1px solid #a7f3d0; border-radius: 8px; background: #f0fdfa; }
.quantum-ir-raman-complementarity > summary { cursor: pointer; color: #065f46; font-weight: 800; }
.quantum-ir-raman-summary { margin: 8px 0; color: var(--text-secondary); font-size: .78rem; font-weight: 700; }
.quantum-ir-raman-complementarity > small { display: block; margin-top: 7px; color: var(--text-muted); }
.quantum-complementarity-legend { display: flex; flex-wrap: wrap; gap: 5px; margin: 7px 0; }
.quantum-complementarity-legend span { padding: 3px 7px; border-radius: 999px; background: #e2e8f0; font-size: .68rem; font-weight: 800; }
.quantum-complementarity-legend .is-ir, .complementarity-ir td:nth-child(5) { color: #4338ca; }
.quantum-complementarity-legend .is-raman, .complementarity-raman td:nth-child(5) { color: #c2410c; }
.quantum-complementarity-legend .is-both, .complementarity-both td:nth-child(5) { color: #047857; }
.quantum-complementarity-legend .is-weak, .complementarity-weak td:nth-child(5) { color: #64748b; }
.quantum-complementarity-table { min-width: 850px; }
.quantum-complementarity-table tbody tr[role="button"] { cursor: pointer; }
.quantum-complementarity-table tbody tr[role="button"]:focus-visible { outline: 2px solid #0d9488; outline-offset: -2px; }
.quantum-complementarity-table td:nth-child(5) { font-weight: 800; }
.quantum-ir-preset-panel { margin: 8px 0 12px; padding: 10px; border: 1px solid #bfdbfe; border-radius: 8px; background: #eff6ff; }
.quantum-ir-preset-panel > div { display: flex; align-items: center; gap: 10px; }
.quantum-ir-preset-panel label { color: var(--text-primary); font-weight: 800; }
.quantum-ir-preset-panel select { min-width: 150px; }
.quantum-ir-preset-panel select[aria-invalid="true"] { border-color: #dc2626; outline-color: #dc2626; }
.quantum-ir-preset-panel p { margin: 7px 0 3px; color: var(--text-secondary); font-size: 0.8rem; }
.quantum-ir-preset-panel small { color: var(--text-muted); }
.quantum-ir-quality { margin: 8px 0 12px; padding: 10px; border: 1px solid; border-radius: 8px; }
.quantum-ir-quality.quality-good { border-color: #86efac; background: #f0fdf4; }
.quantum-ir-quality.quality-review { border-color: #fcd34d; background: #fffbeb; }
.quantum-ir-quality.quality-invalid { border-color: #fca5a5; background: #fef2f2; }
.quantum-ir-quality > div { display: flex; justify-content: space-between; font-weight: 800; }
.quantum-ir-quality.quality-good > div strong { color: #15803d; }
.quantum-ir-quality.quality-review > div strong { color: #b45309; }
.quantum-ir-quality.quality-invalid > div strong { color: #b91c1c; }
.quantum-ir-quality p { margin: 5px 0; color: var(--text-secondary); font-size: 0.78rem; }
.quantum-ir-raman-option { display: block; margin-top: 8px; color: #7c2d12; font-size: 0.78rem; font-weight: 800; }
.quantum-ir-raman-option input { accent-color: #c2410c; }
.quantum-ir-quality ul { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 5px; margin: 7px 0; padding: 0; list-style: none; }
.quantum-ir-quality li { display: flex; justify-content: space-between; gap: 8px; padding: 5px 7px; border-radius: 5px; background: rgba(255,255,255,.75); font-size: 0.72rem; }
.quantum-ir-quality li.quality-check-pass strong { color: #15803d; }
.quantum-ir-quality li.quality-check-warning strong, .quantum-ir-quality li.quality-check-unknown strong { color: #b45309; }
.quantum-ir-quality li.quality-check-fail strong { color: #b91c1c; }
.quantum-ir-comparison { margin: 8px 0 12px; padding: 8px 10px; border: 1px solid #cbd5e1; border-radius: 8px; background: #f8fafc; }
.quantum-ir-comparison > summary { cursor: pointer; color: var(--text-primary); font-weight: 800; }
.quantum-ir-comparison-heading { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 6px 14px; margin: 7px 0; }
.quantum-ir-comparison-heading p { margin: 0; color: var(--text-secondary); font-size: 0.78rem; }
.quantum-ir-comparison-heading label { color: var(--text-secondary); font-size: 0.75rem; font-weight: 700; }
.quantum-ir-comparison-heading input { accent-color: var(--primary); }
.quantum-ir-comparison-table { min-width: 720px; }
.quantum-ir-comparison-table tr.comparison-inside td:last-child { color: #15803d; font-weight: 800; }
.quantum-ir-comparison-table tr.comparison-near td:last-child { color: #b45309; font-weight: 800; }
.quantum-ir-comparison-table tr.comparison-unmatched td:last-child { color: #b91c1c; font-weight: 800; }
.ir-measured-panel { margin: 10px 0; padding: 10px 12px; border: 1px solid #bae6fd; border-radius: 9px; background: #f0f9ff; }
.ir-measured-heading { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px 16px; }
.ir-measured-heading h3, .ir-measured-heading p { margin: 0; }
.ir-measured-heading p, .ir-measured-panel small { color: var(--text-secondary); font-size: 0.78rem; }
.ir-measured-heading > div:last-child { display: flex; gap: 6px; }
.ir-measured-summary { margin: 8px 0 4px; font-weight: 700; color: #075985; }
.ir-measured-panel details { margin: 7px 0; }
.ir-measured-panel summary { cursor: pointer; font-weight: 800; color: var(--text-primary); }
.ir-measured-table { min-width: 650px; }
.ir-measured-table tr.is-match td:last-child { color: #15803d; font-weight: 800; }
.ir-measured-table tr.is-near td:last-child { color: #b45309; font-weight: 800; }
.ir-measured-table tr.is-missing td:last-child { color: #b91c1c; font-weight: 800; }
.ir-spectrum-measured { fill: none; stroke: #dc2626; stroke-width: 1.6; opacity: 0.82; vector-effect: non-scaling-stroke; }
.quantum-ir-fast-band { fill: #f59e0b; opacity: 0.13; stroke: #d97706; stroke-width: 0.7; pointer-events: none; }
.quantum-ir-spectrum-figure { margin: 8px 0 12px; }
.quantum-ir-spectrum-figure svg { display: block; width: 100%; height: auto; max-height: 200px; border: 1px solid var(--border-color); border-radius: var(--radius-md); background: #fff; }
.quantum-ir-spectrum-figure figcaption { margin-top: 4px; color: var(--text-muted); font-size: 0.72rem; }
.quantum-ir-axis { stroke: #64748b; stroke-width: 1; }
.quantum-ir-axis-label { fill: #475569; font: 10px Arial, sans-serif; text-anchor: middle; }
.quantum-ir-stick { stroke: #7c3aed; stroke-width: 2; }
.quantum-ir-stick[role="button"] { cursor: pointer; }
.quantum-ir-stick[role="button"]:focus { outline: none; stroke: #ea580c; stroke-width: 5; }
.quantum-ir-stick.is-selected-mode { stroke: #dc2626; stroke-width: 5; }
.quantum-ir-curve { fill: none; stroke: #2563eb; stroke-width: 2.2; stroke-linejoin: round; stroke-linecap: round; opacity: 0.88; }
.quantum-ir-fingerprint { fill: #eef2ff; opacity: 0.72; }
.quantum-ir-fingerprint-label { fill: #4338ca; font: 700 10px Arial, sans-serif; text-anchor: middle; }
.quantum-raman-fingerprint { fill: #ecfdf5; opacity: .78; }
.quantum-raman-fingerprint-label { fill: #047857; font: 700 10px Arial, sans-serif; text-anchor: middle; }
.quantum-raman-stick { stroke: #ea580c; stroke-width: 2; cursor: pointer; }
.quantum-raman-stick:focus { outline: none; stroke: #dc2626; stroke-width: 5; }
.quantum-raman-curve { fill: none; stroke: #059669; stroke-width: 2.2; stroke-linejoin: round; stroke-linecap: round; opacity: .9; }
.quantum-ir-animation-panel { margin: 10px 0 14px; padding: 10px; border: 1px solid var(--border-color); border-radius: var(--radius-md); background: #f8fafc; }
.quantum-ir-animation-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.quantum-ir-animation-heading h5, .quantum-ir-animation-heading p { margin: 0; }
.quantum-ir-animation-heading p { margin-top: 3px; color: var(--text-secondary); font-size: 0.78rem; }
.quantum-ir-animation-controls { display: grid; grid-template-columns: auto minmax(90px, 1fr) auto minmax(90px, 1fr); align-items: center; gap: 6px 10px; margin-top: 9px; }
.quantum-ir-animation-controls label { color: var(--text-secondary); font-size: 0.75rem; font-weight: 700; }
.quantum-ir-animation-controls output { color: var(--primary); font-variant-numeric: tabular-nums; }
.quantum-ir-animation-controls input[type="range"] { width: 100%; accent-color: var(--primary); }
.quantum-ir-animation-check { grid-column: 1 / -1; display: inline-flex; align-items: center; gap: 6px; width: fit-content; cursor: pointer; }
.quantum-ir-animation-check input { accent-color: var(--primary); }
.quantum-ir-animation-heat-legend { grid-column: 1 / -1; display: flex; align-items: center; gap: 7px; color: var(--text-muted); font-size: 0.7rem; }
.quantum-ir-animation-heat-scale { width: 92px; height: 7px; border-radius: 999px; background: linear-gradient(90deg, #fde047, #fb923c, #ef4444); }
.quantum-ir-animation-position-labels { grid-column: 2 / -1; display: flex; justify-content: space-between; margin-top: -5px; color: var(--text-muted); font-size: 0.65rem; pointer-events: none; }
@media (max-width: 620px) { .quantum-ir-animation-controls { grid-template-columns: auto 1fr; } }
#quantum-ir-animation { display: block; width: 100%; height: min(260px, 42vh); margin-top: 8px; border-radius: 8px; background: #fff; }
.quantum-ir-animation-bond { stroke: #475569; stroke-width: 3; stroke-linecap: round; }
.quantum-ir-animation-bond.bond-order-2 { stroke-width: 5; }
.quantum-ir-animation-bond.bond-order-3 { stroke-width: 7; }
.quantum-ir-animation-atom { fill: #e2e8f0; stroke: #334155; stroke-width: 1.5; }
.quantum-ir-animation-atom.element-C { fill: #475569; }
.quantum-ir-animation-atom.element-O { fill: #ef4444; }
.quantum-ir-animation-atom.element-N { fill: #3b82f6; }
.quantum-ir-animation-atom.element-S { fill: #eab308; }
.quantum-ir-animation-atom-label { fill: #fff; font: 700 10px Arial, sans-serif; text-anchor: middle; pointer-events: none; }
.quantum-ir-animation-atom.element-H + .quantum-ir-animation-atom-label { fill: #334155; }
.quantum-ir-animation-direction { stroke: #0ea5e9; stroke-width: 1.6; stroke-linecap: round; pointer-events: none; }
.quantum-ir-direction-arrowhead { fill: #0ea5e9; }
.quantum-ir-animation-heat { stroke-width: 1; pointer-events: none; }
.quantum-ir-animation-heat.heat-low { fill: #fde047; stroke: #eab308; }
.quantum-ir-animation-heat.heat-medium { fill: #fb923c; stroke: #f97316; }
.quantum-ir-animation-heat.heat-high { fill: #ef4444; stroke: #dc2626; }
.quantum-ir-animation-help { margin: 5px 0 0; color: var(--text-muted); font-size: 0.72rem; }
.quantum-ir-results tbody tr[role="button"] { cursor: pointer; }
.quantum-ir-results tbody tr[role="button"]:focus-visible { outline: 2px solid var(--primary); outline-offset: -2px; }
.quantum-ir-results tbody tr.is-selected-mode { background: #eef2ff; }
.quantum-ir-peak-label { fill: #5b21b6; font: 700 9px Arial, sans-serif; text-anchor: middle; }
@media (max-width: 600px) { .quantum-ir-connection { grid-template-columns: 1fr; } .quantum-ir-connection button { grid-column: 1; } }
.ir-mode-title { margin: 14px 0 4px; font-size: 0.95rem; }
.ir-mode-help { margin: 0 0 8px; color: var(--text-muted); font-size: 0.78rem; }
.ir-mode-list { display: flex; flex-wrap: wrap; gap: 6px; max-height: 110px; overflow: auto; }
.ir-mode-chip { padding: 5px 8px; border: 1px solid var(--border-color); border-radius: 999px; background: rgba(79, 70, 229, 0.06); font-size: 0.76rem; font-variant-numeric: tabular-nums; }
.ir-spectrum-figure { margin: 8px 0 10px; }
.ir-residual-model-status { margin: 0 0 6px; padding: 7px 9px; border: 1px solid #cbd5e1; border-radius: 6px; background: #f8fafc; color: #475569; font-size: 0.76rem; }
.ir-residual-model-status.is-applied { border-color: #86efac; background: #f0fdf4; color: #166534; }
.ir-residual-model-status.is-fallback { border-color: #fde68a; background: #fffbeb; color: #92400e; }
.ir-spectrum-figure svg { display: block; width: 100%; height: auto; max-height: 210px; background: #ffffff; border: 1px solid var(--border-color); border-radius: var(--radius-md); }
.ir-spectrum-figure figcaption { margin-top: 4px; color: var(--text-muted); font-size: 0.72rem; }
.ir-spectrum-axis { stroke: #64748b; stroke-width: 1; }
.ir-spectrum-grid { stroke: #cbd5e1; stroke-width: 0.7; stroke-dasharray: 3 4; }
.ir-spectrum-curve { fill: none; stroke: #4f46e5; stroke-width: 2; }
.ir-spectrum-label { fill: #475569; font-family: Arial, sans-serif; font-size: 11px; text-anchor: middle; }
.ir-spectrum-y-label { fill: #475569; font-family: Arial, sans-serif; font-size: 9px; text-anchor: end; }
.ir-spectrum-peak-marker { fill: #312e81; }
.ir-spectrum-peak-marker.is-minor { fill: #6366f1; }
.ir-spectrum-peak-label { fill: #312e81; font-family: Arial, sans-serif; font-size: 9px; font-weight: 700; text-anchor: middle; }
.ir-peak-assignments { display: grid; grid-template-columns: repeat(auto-fit, minmax(235px, 1fr)); gap: 5px 12px; margin: 7px 0 0; padding: 0; list-style: none; font-size: 0.74rem; }
.ir-peak-assignments li { display: grid; grid-template-columns: 28px 78px 1fr; align-items: baseline; padding: 5px 7px; border: 1px solid var(--border-color); border-radius: 6px; background: rgba(79, 70, 229, 0.04); }
.ir-peak-assignments strong { color: #4338ca; }
.ir-peak-assignment-name { color: var(--text-muted); }
.ir-peak-assignments li.is-minor { border-style: dashed; background: rgba(99, 102, 241, 0.025); }
.ir-spectrum-fingerprint { fill: #eef2ff; opacity: 0.7; }
.ir-spectrum-fingerprint-label { fill: #4338ca; font-family: Arial, sans-serif; font-size: 11px; font-weight: 700; text-anchor: middle; }
.ei-ms-summary { margin: 0 0 8px; color: var(--text-primary); font-size: 0.84rem; font-weight: 700; }
.ei-ms-support { margin: 0 0 12px; padding: 10px 12px; border: 1px solid #cbd5e1; border-left-width: 5px; border-radius: 8px; background: #f8fafc; font-size: 0.8rem; }
.ei-ms-support.support-validated { border-left-color: #15803d; background: #f0fdf4; }
.ei-ms-support.support-partial { border-left-color: #ca8a04; background: #fefce8; }
.ei-ms-support.support-none { border-left-color: #b91c1c; background: #fef2f2; }
.ei-ms-support-heading { display: flex; gap: 8px; align-items: baseline; margin-bottom: 4px; font-weight: 700; }
.ei-ms-support.support-validated strong { color: #15803d; }
.ei-ms-support.support-partial strong { color: #a16207; }
.ei-ms-support.support-none strong { color: #b91c1c; }
.ei-ms-support p { margin: 2px 0; }
.ei-ms-support small { display: block; margin-top: 5px; color: var(--text-secondary); }
.ei-ms-measurement-variability { margin: 0 0 12px; padding: 10px 12px; border: 1px solid #f59e0b; border-left: 5px solid #d97706; border-radius: 8px; background: #fffbeb; font-size: 0.8rem; }
.ei-ms-measurement-variability[hidden] { display: none; }
.ei-ms-measurement-variability strong { color: #b45309; }
.ei-ms-measurement-variability p { margin: 2px 0; }
.ei-ms-measurement-variability small { display: block; margin-top: 5px; color: var(--text-secondary); }
.ei-ms-axis { stroke: #64748b; stroke-width: 1; }
.ei-ms-stick { stroke: #4f46e5; stroke-width: 2; }
.ei-ms-stick.is-high { stroke: #15803d; stroke-width: 2.4; }
.ei-ms-stick.is-medium { stroke: #4f46e5; stroke-width: 2; }
.ei-ms-stick.is-low { stroke: #94a3b8; stroke-width: 1.4; opacity: 0.58; }
.ei-ms-stick[role="button"] { cursor: pointer; outline: none; }
.ei-ms-stick.is-selected { stroke: #dc2626; stroke-width: 4; opacity: 1; filter: drop-shadow(0 0 2px rgba(220, 38, 38, 0.55)); }
.ei-ms-stick:focus { stroke: #dc2626; stroke-width: 4; }
.ei-ms-x-label { fill: #475569; font-family: Arial, sans-serif; font-size: 10px; text-anchor: middle; }
.ei-ms-y-label { fill: #475569; font-family: Arial, sans-serif; font-size: 9px; text-anchor: end; }
.ei-ms-peak-label { fill: #312e81; font-family: Arial, sans-serif; font-size: 9px; font-weight: 700; text-anchor: middle; }
.ei-ms-results-table { min-width: 680px; }
.ei-ms-confidence { font-weight: 700; text-align: center; white-space: nowrap; }
.ei-ms-confidence.confidence-高 { color: #15803d; }
.ei-ms-confidence.confidence-中 { color: #a16207; }
.ei-ms-confidence.confidence-低 { color: #b91c1c; }
.ei-ms-fragment-panel { margin: 12px 0; padding: 11px; border: 1px solid var(--border-color); border-radius: 9px; background: #fff; }
.ei-ms-fragment-heading { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 14px; font-size: 0.8rem; }
.ei-ms-fragment-heading > div { display: flex; flex-wrap: wrap; gap: 6px 12px; align-items: baseline; }
.ei-ms-fragment-heading strong { color: #312e81; font-size: 0.9rem; }
.ei-ms-fragment-heading label { font-weight: 700; }
.ei-ms-fragment-heading select { max-width: min(100%, 360px); }
#ei-ms-fragment-structure { display: block; width: 100%; height: 230px; margin-top: 8px; border: 1px solid #e2e8f0; border-radius: 7px; background: #f8fafc; }
.ei-ms-fragment-bond line { stroke: #334155; stroke-width: 2.2; stroke-linecap: round; }
.ei-ms-fragment-bond.is-cut line { stroke: #dc2626; stroke-width: 4.5; stroke-dasharray: 8 5; filter: drop-shadow(0 0 2px rgba(220, 38, 38, 0.45)); }
.ei-ms-fragment-atom-bg { fill: #f8fafc; }
.ei-ms-fragment-atom { fill: #111827; font: 700 13px Arial, sans-serif; text-anchor: middle; }
.ei-ms-fragment-atom.element-O { fill: #dc2626; }
.ei-ms-fragment-atom.element-N { fill: #2563eb; }
.ei-ms-fragment-atom.element-S { fill: #a16207; }
#ei-ms-fragment-message { margin: 7px 0 2px; color: var(--text-primary); font-size: 0.78rem; }
.ei-ms-fragment-legend { margin: 3px 0 0; color: var(--text-muted); font-size: 0.72rem; }
.ei-ms-fragment-legend span { display: inline-block; width: 30px; margin-right: 6px; border-top: 3px dashed #dc2626; vertical-align: middle; }
.ei-ms-peak-button { min-width: 46px; padding: 3px 7px; border: 1px solid #c7d2fe; border-radius: 5px; background: #eef2ff; color: #3730a3; font: inherit; font-weight: 700; cursor: pointer; }
.ei-ms-peak-button:hover, .ei-ms-peak-button:focus { border-color: #6366f1; background: #e0e7ff; outline: 2px solid rgba(99, 102, 241, 0.22); }
#ei-ms-results-body tr.is-selected td { background: #fff1f2; }
@media (max-width: 640px) {
  #ei-ms-fragment-structure { height: 190px; }
  .ei-ms-fragment-heading { align-items: stretch; flex-direction: column; }
}

.text-area {
  width: 100%;
  height: 150px;
  background: rgba(0, 0, 0, 0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px;
  color: var(--text-primary);
  font-family: monospace;
  font-size: 0.85rem;
  resize: none;
}

.text-area:focus {
  outline: none;
  border-color: var(--color-accent);
}

.smiles-label {
  display: block;
  margin-bottom: 7px;
  color: var(--text-dark);
  font-size: 0.82rem;
  font-weight: 700;
}

.smiles-input {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.04);
  color: var(--text-primary);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.95rem;
}

.smiles-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.14);
}

.smiles-help {
  margin-top: 9px;
  color: var(--text-muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.cas-caution {
  margin: 10px 0 0;
  padding: 10px 12px;
  border-left: 3px solid #d97706;
  border-radius: 4px;
  background: #fffbeb;
  color: #78350f;
  font-size: 0.82rem;
  line-height: 1.5;
}

.cas-lookup-status {
  min-height: 1.5em;
  margin: 10px 0 0;
  color: var(--text-muted);
  font-size: 0.86rem;
}

.cas-lookup-status[data-state="error"] { color: #b91c1c; }
.cas-lookup-status[data-state="loading"] { color: var(--color-accent); }
.cas-result { margin-top: 14px; padding: 14px; border: 1px solid var(--border-color); border-radius: 8px; background: var(--bg-secondary); }
.cas-result h3 { margin: 0 0 10px; font-size: 0.95rem; }
.cas-result-details { display: grid; gap: 7px; margin: 0; }
.cas-result-details div { display: grid; grid-template-columns: 105px minmax(0, 1fr); gap: 10px; }
.cas-result-details dt { color: var(--text-secondary); font-weight: 600; }
.cas-result-details dd { margin: 0; overflow-wrap: anywhere; }
.cas-result-smiles { font-family: Consolas, monospace; font-size: 0.85rem; }
.cas-result-source { display: inline-block; margin-top: 11px; color: var(--color-accent); }
.structure-cas-candidates { font-weight: 800; color: #3730a3; }

.smiles-examples {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.smiles-examples button {
  padding: 5px 9px;
  border: 1px solid rgba(79, 70, 229, 0.2);
  border-radius: 999px;
  background: rgba(79, 70, 229, 0.07);
  color: var(--color-accent);
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 600;
}

.smiles-examples button:hover {
  background: rgba(79, 70, 229, 0.14);
}

/* Chemical Analysis Info Panel */
.chemical-info-panel {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-panel);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: 30px;
  padding: 6px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow-lg);
  z-index: 5;
  transition: all 0.3s ease;
  font-size: 0.85rem;
}

.chemical-info-panel:hover {
  border-color: rgba(79, 70, 229, 0.4);
  box-shadow: 0 12px 28px -4px rgba(79, 70, 229, 0.15);
}

.chemical-warning {
  position: absolute;
  top: 62px;
  left: 50%;
  transform: translateX(-50%);
  max-width: min(720px, calc(100% - 260px));
  padding: 7px 12px;
  border: 1px solid rgba(217, 119, 6, 0.35);
  border-radius: var(--radius-md);
  background: rgba(255, 251, 235, 0.96);
  color: #92400e;
  box-shadow: 0 4px 12px rgba(146, 64, 14, 0.08);
  display: flex;
  align-items: flex-start;
  gap: 7px;
  z-index: 5;
  font-size: 0.76rem;
  line-height: 1.4;
  pointer-events: none;
}

.chemical-warning[hidden] {
  display: none;
}

.chemical-warning.is-estimate {
  border-color: rgba(79, 70, 229, 0.22);
  background: rgba(238, 242, 255, 0.96);
  color: #4338ca;
}

.chemical-warning svg {
  width: 14px;
  height: 14px;
  flex: 0 0 auto;
  margin-top: 1px;
}

.info-item {
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.info-label {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.info-value {
  color: var(--text-primary);
  font-weight: 700;
  font-family: 'Outfit', sans-serif;
  letter-spacing: 0.02em;
}

.info-value.formula-text {
  font-size: 0.95rem;
  color: var(--color-accent);
}

.info-divider {
  width: 1px;
  height: 16px;
  background-color: var(--border-color);
}

.info-copy-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  margin-left: 2px;
}

.info-copy-btn:hover {
  background: rgba(79, 70, 229, 0.1);
  color: var(--color-accent);
}

.molecular-info-modal-container { box-sizing: border-box; width: min(720px, calc(100vw - 24px)); max-width: 720px; max-height: calc(100dvh - 24px); overflow: hidden; display: flex; flex-direction: column; }
.molecular-info-body { overflow-y: auto; }
.molecular-info-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin: 0; }
.molecular-info-grid > div { min-width: 0; padding: 11px 12px; border: 1px solid var(--border-color); border-radius: 9px; background: rgba(248, 250, 252, .88); }
.molecular-info-grid .molecular-info-wide { grid-column: 1 / -1; }
.molecular-info-grid dt { margin-bottom: 5px; color: var(--text-muted); font-size: .75rem; font-weight: 700; }
.molecular-info-grid dd { margin: 0; color: var(--text-primary); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .84rem; line-height: 1.5; overflow-wrap: anywhere; }
.molecular-info-grid #molecular-info-iupac { font-family: inherit; }
.molecular-info-value { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.molecular-info-value > span { min-width: 0; overflow-wrap: anywhere; }
.molecular-copy-btn { flex: 0 0 auto; min-height: 34px; font-family: var(--font-sans); font-size: .76rem; }
.molecular-info-note { margin: 12px 0 5px; color: var(--text-muted); font-size: .76rem; line-height: 1.55; }
.molecular-info-status { margin: 7px 0 0; color: var(--color-accent); font-size: .78rem; font-weight: 600; }
.molecular-info-status[data-tone="error"] { color: #b91c1c; }
.molecular-info-actions { flex-wrap: wrap; }

@media (max-width: 560px) {
  .molecular-info-modal-container { padding: 16px; }
  .molecular-info-grid { grid-template-columns: 1fr; }
  .molecular-info-grid .molecular-info-wide { grid-column: auto; }
  .molecular-info-value { align-items: stretch; flex-direction: column; }
  .molecular-copy-btn { width: 100%; justify-content: center; }
  .molecular-info-actions .btn { flex: 1 1 100%; justify-content: center; }
}

/* Color Picker Area Styles */
.color-picker-area {
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-top: 1px solid var(--border-color);
  padding-top: 8px;
}

.color-palette-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
}

.color-btn {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all 0.2s ease;
  justify-self: center;
}

.color-btn[data-color="default"] { background: linear-gradient(135deg, #1e1e2e 0 48%, #fff 48% 52%, #dc2626 52% 100%); }
.color-btn[data-color="#1e1e2e"] { background: #1e1e2e; }
.color-btn[data-color="#dc2626"] { background: #dc2626; }
.color-btn[data-color="#2563eb"] { background: #2563eb; }
.color-btn[data-color="#059669"] { background: #059669; }
.color-btn[data-color="#ea580c"] { background: #ea580c; }
.color-btn[data-color="#7c3aed"] { background: #7c3aed; }

.color-btn:hover {
  transform: scale(1.2);
}

.color-btn.active {
  box-shadow: 0 0 0 2px var(--bg-panel), 0 0 0 4px var(--color-accent);
  transform: scale(1.1);
}

.custom-color-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4px;
  margin-top: 2px;
}

.color-input-picker {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  width: 32px;
  height: 24px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  background: none;
  padding: 0;
}

.color-input-picker::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-input-picker::-webkit-color-swatch {
  border: none;
  border-radius: 4px;
}

/* Polymer Bracket Styles */
.polymer-bracket-line {
  stroke: #1e1e2e;
  stroke-width: 2;
  fill: none;
  stroke-linecap: square;
  transition: stroke 0.15s ease;
}
.polymer-repeat-bond { stroke: var(--drawing-bond-color, #111827); stroke-width: var(--drawing-bond-width, 1.6px); stroke-linecap: round; }
.polymer-repeat-bond.selected { stroke: var(--color-accent); }

.polymer-label {
  font-family: 'Outfit', sans-serif;
  font-size: 14px;
  font-weight: 700;
  fill: #1e1e2e;
  cursor: pointer;
  user-select: none;
  dominant-baseline: hanging;
}

.polymer-label:hover {
  fill: var(--color-accent);
}

.copolymer-label {
  fill: #4338ca;
  font-size: 11px;
  font-weight: 700;
  text-anchor: middle;
  paint-order: stroke;
  stroke: #ffffff;
  stroke-width: 3px;
  pointer-events: none;
}

.polymer-hitbox {
  fill: none;
  stroke: transparent;
  stroke-width: 16;
  cursor: pointer;
}

/* Charge & Radical Styles */
.atom-charge-text {
  font-family: 'Outfit', sans-serif;
  font-size: 11px;
  font-weight: 700;
  text-anchor: middle;
  dominant-baseline: central;
}

.atom-charge-plus {
  fill: #dc2626; /* Red for cation */
}

.atom-charge-minus {
  fill: #2563eb; /* Blue for anion */
}

.atom-radical-dot {
  fill: #1e1e2e;
}

.atom-isotope-text,
.atom-map-text {
  font-family: 'Outfit', sans-serif;
  font-size: 9px;
  font-weight: 700;
  pointer-events: none;
}

.atom-isotope-text {
  fill: #1e1e2e;
  text-anchor: end;
}

.atom-map-text {
  fill: #7c3aed;
  text-anchor: start;
}

/* Keep every tool reachable on short desktop and landscape-tablet screens. */
@media (min-width: 701px) and (max-height: 800px) {
  .floating-toolbar {
    overflow-y: auto;
    overflow-x: hidden;
  }
}

.reaction-tool-symbol {
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1;
}

.reaction-tool-text {
  font-size: 0.65rem;
}

.copolymer-tool-symbol { font-size: 0.62rem; font-weight: 800; letter-spacing: -0.04em; }
.copolymer-builder-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin: 14px 0; }
.copolymer-reaction-sites { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin: 14px 0; padding: 12px; border: 1px solid var(--border-color); border-radius: 8px; }
.copolymer-reaction-sites[hidden] { display: none; }
.copolymer-reaction-sites legend { padding: 0 6px; font-weight: 700; }
.copolymer-reaction-sites p, .copolymer-reaction-sites small { grid-column: 1 / -1; margin: 0; }
.copolymer-second-site-toggle, .copolymer-second-sites { grid-column: 1 / -1; }
.copolymer-second-sites { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.copolymer-second-sites[hidden] { display: none; }
.copolymer-addition-site-list { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
@media (max-width: 620px) { .copolymer-builder-grid { grid-template-columns: 1fr; } }

.reaction-arrow-line {
  stroke: #1e1e2e;
  stroke-width: 2.2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.reaction-plus-text,
.reaction-condition-text {
  fill: #1e1e2e;
  font-family: var(--font-sans);
  text-anchor: middle;
  dominant-baseline: central;
}

.reaction-plus-text { font-size: 24px; font-weight: 600; }
.reaction-condition-text { font-size: 14px; font-weight: 500; }
.reaction-arrow-line.selected { stroke: var(--color-accent); }
.reaction-plus-text.selected,
.reaction-condition-text.selected { fill: var(--color-accent); font-weight: 700; }
.reaction-hitbox { stroke: transparent; stroke-width: 18; fill: transparent; cursor: pointer; }

/* Tablet layout */
@media (max-width: 1024px) {
  header {
    padding: 0 12px;
    gap: 12px;
  }

  .logo-area {
    flex: 0 0 auto;
  }

  .actions-area {
    flex: 1;
    min-width: 0;
    overflow: visible;
    gap: 6px;
    padding: 4px 0;
  }

  .actions-area > .btn,
  .actions-area > .action-menu > summary.btn {
    flex: 0 0 auto;
    padding: 8px 10px;
  }

  .floating-toolbar {
    top: 12px;
    left: 12px;
  }

  .floating-sidebar {
    top: 12px;
    right: 12px;
  }

  .chemical-info-panel {
    top: 72px;
    max-width: calc(100% - 250px);
    overflow-x: auto;
  }

  .chemical-warning {
    max-width: calc(100% - 250px);
  }

  .tool-btn,
  .element-btn {
    min-width: 44px;
    min-height: 44px;
  }

  .viewport-btn {
    width: 44px;
    height: 44px;
  }
}

/* Phone layout */
@media (max-width: 700px) {
  body {
    height: 100vh;
    height: 100dvh;
  }

  header {
    height: 54px;
    padding: 0 8px;
    gap: 8px;
  }

  .logo-icon {
    width: 32px;
    height: 32px;
    border-radius: 10px;
  }

  .logo-icon svg {
    width: 27px;
    height: 27px;
  }

  .logo-text {
    font-size: 1rem;
  }

  .version-badge,
  .actions-area > .divider {
    display: none;
  }

  .actions-area {
    gap: 4px;
  }

  .actions-area > .btn,
  .actions-area > .action-menu > summary.btn {
    min-width: 44px;
    min-height: 44px;
    padding: 9px;
    justify-content: center;
    gap: 0;
    font-size: 0;
  }

  .actions-area > .btn svg,
  .actions-area > .action-menu > summary.btn svg {
    width: 18px;
    height: 18px;
  }

  .action-menu-panel {
    position: fixed;
    top: 58px;
    right: 8px;
    left: auto;
  }

  .action-menu-panel .btn {
    min-width: 0;
    min-height: 42px;
    padding: 9px 11px;
    gap: 8px;
    justify-content: flex-start;
    font-size: 0.82rem;
  }

  .floating-toolbar {
    display: flex;
    top: auto;
    left: 8px;
    right: 8px;
    bottom: 8px;
    padding: 5px;
    flex-direction: row;
    gap: 3px;
    min-height: 58px;
    max-height: 58px;
    overflow-x: auto;
    overflow-y: hidden;
    border-radius: 14px;
    scrollbar-width: none;
  }

  .mobile-tool-help:not([hidden]) {
    position: absolute;
    z-index: 7;
    right: 8px;
    bottom: 72px;
    left: 8px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 12px;
    border: 1px solid var(--border-color-active);
    border-radius: 10px;
    background: rgba(17, 24, 39, 0.96);
    color: #fff;
    box-shadow: 0 8px 22px rgba(0, 0, 0, 0.28);
  }

  .mobile-tool-help-text { min-width: 0; display: flex; flex: 1; flex-direction: column; gap: 3px; }
  .mobile-tool-help strong { font-size: 0.8rem; }
  .mobile-tool-help span { font-size: 0.72rem; line-height: 1.45; color: #e5e7eb; }
  .mobile-tool-help button {
    flex: 0 0 30px;
    width: 30px;
    height: 30px;
    border: 0;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    cursor: pointer;
    font-size: 1.2rem;
  }

  .floating-toolbar::-webkit-scrollbar {
    display: none;
  }

  .floating-toolbar .tool-btn {
    flex: 0 0 44px;
    width: 44px;
    height: 44px;
  }

  .floating-toolbar .tool-category {
    display: flex;
    flex: 0 0 auto;
    min-width: 0;
    align-items: center;
    order: 2;
  }

  .floating-toolbar .tool-category:not([open]) { order: 3; }

  .floating-toolbar .tool-category > summary {
    flex: 0 0 auto;
    width: auto;
    min-width: 48px;
    min-height: 44px;
    padding: 4px 8px;
    justify-content: center;
    writing-mode: horizontal-tb;
    border-radius: 9px;
    font-size: 0.7rem;
  }

  .floating-toolbar .tool-category[open] > summary { background: rgba(99, 102, 241, 0.12); color: var(--color-accent); }

  .floating-toolbar .tool-group-label { display: none; }

  .floating-toolbar .tool-category-chevron { display: none; }

  .floating-toolbar .tool-category-content {
    display: flex;
    gap: 4px;
    padding: 0 0 0 4px;
  }

  .floating-toolbar .tool-category:not([open]) .tool-category-content { display: none; }

  .floating-toolbar .tool-category + .tool-category {
    margin: 0 0 0 3px;
    padding: 0 0 0 3px;
    border-top: 0;
    border-left: 1px solid var(--border-color);
  }

  .floating-toolbar .divider {
    flex: 0 0 1px;
    width: 1px;
    height: 34px;
    margin: 6px 3px;
  }

  .tool-btn[data-tooltip]::after {
    display: none;
  }

  .floating-sidebar {
    position: fixed;
    z-index: 20;
    top: auto;
    bottom: 72px;
    left: 8px;
    right: 8px;
    width: auto;
    max-height: min(52dvh,430px);
    padding: 10px;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    align-items: center;
    gap: 6px;
    overflow-x: hidden;
    overflow-y: auto;
    border-radius: 16px;
    scrollbar-width: none;
    transform: translateY(calc(100% + 90px));
    visibility: hidden;
    opacity: 0;
    transition: transform .2s ease,opacity .2s ease,visibility 0s linear .2s;
  }

  .floating-sidebar.mobile-open { transform: translateY(0);visibility:visible;opacity:1;transition-delay:0s; }
  .mobile-sidebar-header { display:flex;position:sticky;z-index:2;top:-10px;grid-column:1/-1;align-items:center;justify-content:space-between;margin:-10px -10px 2px;padding:10px 12px 8px;background:rgba(255,255,255,.98);border-bottom:1px solid var(--border-color);font-size:.86rem; }
  .mobile-sidebar-header button { width:36px;height:36px;border:0;border-radius:9px;background:rgba(0,0,0,.06);color:var(--text-primary);font-size:1.35rem; }
  .mobile-elements-toggle { display:flex;position:absolute;z-index:8;right:8px;bottom:72px;min-height:46px;align-items:center;gap:7px;padding:5px 12px 5px 6px;border:1px solid var(--border-color-active);border-radius:999px;background:rgba(255,255,255,.97);color:var(--text-primary);box-shadow:var(--shadow-lg);font:700 .78rem/1 var(--font-sans); }
  .mobile-elements-symbol { display:grid;width:34px;height:34px;place-items:center;border-radius:50%;background:linear-gradient(135deg,var(--color-accent),#a855f7);color:#fff;font-size:.9rem; }
  .mobile-elements-open .mobile-elements-toggle { visibility:hidden; }

  .property-panel {
    position: fixed;
    top: 132px;
    right: 8px;
    width: min(230px, calc(100vw - 16px));
    max-height: calc(100dvh - 210px);
    overflow-y: auto;
  }

  .floating-sidebar::-webkit-scrollbar {
    display: none;
  }

  .floating-sidebar .sidebar-title {
    display: none;
  }

  .sidebar-section {
    grid-column: 1 / -1;
    width: 100%;
  }

  .sidebar-section > summary {
    min-height: 40px;
    padding: 6px 4px;
    font-size: 0.78rem;
  }

  .element-grid,
  .color-palette-grid {
    display: grid;
    gap: 5px;
  }

  .element-grid {
    grid-template-columns: repeat(5, minmax(44px, 1fr));
    order: 1;
  }

  .element-btn {
    width: 100%;
    min-width: 0;
    height: 44px;
  }

  .custom-element-area,
  .color-picker-area {
    width: 100%;
    flex-direction: row;
    align-items: center;
    gap: 5px;
    border-left: 0;
    border-top: 1px solid var(--border-color);
    padding: 7px 0 0;
  }

  .sidebar-section { order: 2; }
  .sidebar-section + .sidebar-section { order: 3; }
  .color-picker-area { order: 2; }
  .color-palette-grid { flex: 1 1 auto; grid-template-columns: repeat(7, minmax(26px, 1fr)); }
  .abbreviation-grid { order: 3; grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .custom-element-area { order: 4; }

  .custom-element-input {
    width: 58px;
    height: 44px;
  }

  #custom-element-btn {
    width: 54px !important;
    height: 44px !important;
  }

  .color-btn {
    width: 38px;
    height: 38px;
  }

  .custom-color-row {
    flex: 0 0 auto;
    margin: 0;
  }

  .color-input-picker {
    width: 42px;
    height: 38px;
  }

  .chemical-info-panel {
    top: 62px;
    max-width: calc(100% - 16px);
    padding: 6px 10px;
    gap: 9px;
    border-radius: 12px;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .layout-controls {
    top: 8px;
    left: 72px;
    right: 8px;
    transform: none;
    max-width: none;
    overflow-x: auto;
    padding: 6px;
    scrollbar-width: none;
  }

  .layout-controls::-webkit-scrollbar { display: none; }
  .layout-control-help { display: none; }
  .mobile-layout-toggle { display: inline-flex; align-items: center; }
  .layout-controls:not(.mobile-angle-open) .angle-control { display: none; }
  .layout-controls.mobile-angle-open .mobile-layout-toggle { border-color: var(--color-accent); color: var(--color-accent); }
  .layout-controls button,
  .layout-controls select,
  .layout-controls input { min-height: 40px; }

  .chemical-info-panel::-webkit-scrollbar {
    display: none;
  }

  .chemical-warning {
    top: 102px;
    width: calc(100% - 16px);
    max-width: none;
    font-size: 0.7rem;
  }

  .viewport-controls {
    right: 8px;
    bottom: 68px;
  }

  .status-bar {
    height: 24px;
    padding: 0 8px;
  }

  .status-bar .status-item:first-child {
    min-width: 0;
    overflow: hidden;
  }

  #status-text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .status-bar .status-item:last-child > span:not(:first-child) {
    display: none;
  }

  .modal-container {
    width: calc(100% - 24px);
    padding: 18px;
  }
}

@media (max-width: 480px) {
  .logo-text {
    display: none;
  }
}

@media (pointer: coarse) {
  .btn,
  .tool-btn,
  .element-btn,
  .viewport-btn,
  .info-copy-btn {
    -webkit-tap-highlight-color: transparent;
  }
}

.interaction-modal-container {
  width: min(1180px, calc(100vw - 24px));
  max-width: 1180px;
  max-height: calc(100vh - 24px);
  padding: clamp(12px, 2.5vw, 24px);
  overflow: hidden;
}
.interaction-modal-container .modal-body { max-height: calc(100vh - 150px); overflow-y: auto; padding-right: 4px; }
.interaction-mode-tabs { position: sticky; top: 0; z-index: 6; display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin-bottom: 12px; padding: 5px; border: 1px solid var(--border-color); border-radius: 10px; background: var(--bg-panel); }
.interaction-mode-tab { display: grid; gap: 2px; padding: 9px 10px; border: 1px solid transparent; border-radius: 7px; background: transparent; color: inherit; font: inherit; font-weight: 700; cursor: pointer; }
.interaction-mode-tab span { color: var(--text-muted); font-size: .72rem; font-weight: 500; }
.interaction-mode-tab.is-active { border-color: #1769aa; background: #e8f2ff; color: #174a7c; }
.interaction-mode-tab.is-active span { color: #315f8d; }
.interaction-mode-view[hidden] { display: none; }
.interaction-beginner-guide { display: grid; gap: 12px; padding: 16px; border: 1px solid #8ab4f8; border-radius: 10px; background: #eef6ff; color: #17365d; }
.interaction-beginner-guide > div:first-child { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.interaction-beginner-guide h3 { margin: 0; font-size: 1rem; }
.interaction-guide-badge { padding: 3px 8px; border-radius: 999px; background: #1769aa; color: #fff; font-size: .75rem; font-weight: 700; }
.interaction-guide-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 0; padding: 0; list-style: none; }
.interaction-guide-steps li { display: flex; align-items: center; gap: 8px; min-width: 0; padding: 9px; border: 1px solid #bdd3ee; border-radius: 8px; background: rgba(255,255,255,.7); opacity: .68; }
.interaction-guide-steps li > span { display: grid; place-items: center; flex: 0 0 28px; height: 28px; border-radius: 50%; background: #d8e3f0; color: #334e68; font-weight: 700; }
.interaction-guide-steps li div { display: grid; min-width: 0; }
.interaction-guide-steps li small { line-height: 1.25; }
.interaction-guide-steps li.is-current { border-color: #1769aa; box-shadow: 0 0 0 1px #1769aa inset; opacity: 1; }
.interaction-guide-steps li.is-current > span { background: #1769aa; color: #fff; }
.interaction-guide-steps li.is-complete { border-color: #248653; opacity: 1; }
.interaction-guide-steps li.is-complete > span { background: #248653; color: #fff; font-size: 0; }
.interaction-guide-steps li.is-complete > span::after { content: '✓'; font-size: 14px; }
.interaction-guide-status { margin: 0; font-weight: 700; }
.interaction-beginner-guide > .btn { justify-self: start; }
.interaction-caution { padding: 10px 12px; border: 1px solid #d69e2e; border-radius: 7px; background: #fff8df; color: #5f4300; }
.interaction-add-panel { display: grid; gap: 10px; padding: 12px; border: 1px solid var(--border-color); border-radius: 8px; }
.interaction-add-panel h3, .interaction-section-heading h3 { margin: 0; }
.interaction-field-help { margin: 4px 0 8px; color: var(--text-muted); line-height: 1.5; }
.interaction-input-grid { display: grid; grid-template-columns: minmax(150px, 1fr) minmax(180px, 1fr) minmax(220px, 2fr); gap: 10px; }
.interaction-input-grid label, .interaction-section-heading label { display: grid; gap: 4px; font-weight: 600; }
.interaction-input-grid input, .interaction-section-heading select { min-width: 0; padding: 7px 8px; border: 1px solid var(--border-color); border-radius: 5px; font: inherit; background: var(--bg-panel); color: inherit; }
.interaction-add-panel > .btn { justify-self: start; }
.interaction-form-actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0; }
.interaction-summary { font-weight: 600; }
.interaction-section-heading { display: flex; align-items: end; justify-content: space-between; gap: 12px; margin: 18px 0 8px; }
.interaction-section-heading label { grid-template-columns: auto minmax(140px, 240px); align-items: center; }
.interaction-section-actions { display: flex; flex-wrap: wrap; align-items: end; justify-content: flex-end; gap: 8px; }
.interaction-section-actions label { display: grid; grid-template-columns: auto minmax(140px, 240px); align-items: center; gap: 8px; font-weight: 600; }
.interaction-table-wrap { max-width: 100%; overflow: auto; border: 1px solid var(--border-color); border-radius: 7px; }
.interaction-table-wrap table { width: 100%; border-collapse: collapse; font-size: .8rem; font-variant-numeric: tabular-nums; }
.interaction-table-wrap th, .interaction-table-wrap td { padding: 7px 8px; border-bottom: 1px solid var(--border-color); white-space: nowrap; text-align: left; }
.interaction-table-wrap thead th { position: sticky; top: 0; background: var(--bg-panel); z-index: 2; }
.interaction-matrix-table th:first-child { position: sticky; left: 0; background: var(--bg-panel); z-index: 1; }
.interaction-matrix-table thead th:first-child { z-index: 3; }
.interaction-remove { padding: 4px 8px; }
.interaction-edit { margin-right: 5px; padding: 4px 8px; }
.interaction-structure-thumbnail { display: block; width: 92px; height: 50px; color: var(--text-color); }
.interaction-thumbnail-bond { stroke: currentColor; stroke-linecap: round; }
.interaction-thumbnail-atom, .interaction-thumbnail-carbon { fill: currentColor; text-anchor: middle; dominant-baseline: central; font: 700 11px Arial, sans-serif; paint-order: stroke; stroke: var(--bg-panel); stroke-width: 3px; }
.interaction-thumbnail-carbon { font-size: 9px; stroke-width: 1px; }
.interaction-nearest-table tr.is-selected td { background: rgba(23, 105, 170, .08); }
.interaction-explain { padding: 4px 8px; }
.interaction-pair-explanation { margin-top: 12px; padding: 12px; border: 1px solid #8ab4f8; border-radius: 8px; background: rgba(232, 242, 255, .45); }
.interaction-pair-explanation h4 { margin: 0 0 6px; }
.interaction-pair-summary { margin: 0; font-weight: 700; }
.interaction-pair-table th:first-child { min-width: 112px; }
.interaction-pair-table td { min-width: 135px; }
.interaction-feature-meter { display: inline-block; width: 84px; height: 8px; margin-right: 7px; overflow: hidden; vertical-align: middle; border-radius: 999px; background: #d8e3f0; }
.interaction-feature-meter > span { display: block; height: 100%; border-radius: inherit; background: #1769aa; }
.interaction-pair-caution { margin: 9px 0 0; color: var(--text-muted); font-size: .8rem; }
.interaction-cluster-note { margin: 0 0 8px; color: var(--text-muted); }
.interaction-clusters { display: grid; gap: 6px; margin: 0; padding-left: 28px; }
.interaction-clusters li { padding: 7px 9px; border: 1px solid var(--border-color); border-radius: 6px; }
.interaction-disclosure { margin-top: 16px; border: 1px solid var(--border-color); border-radius: 9px; background: var(--bg-panel); }
.interaction-disclosure > summary { cursor: pointer; padding: 12px 14px; font-weight: 700; }
.interaction-disclosure[open] > summary { border-bottom: 1px solid var(--border-color); }
.interaction-disclosure-body { padding: 0 12px 12px; }
.interaction-advanced-disclosure > summary { color: var(--text-muted); }
.interaction-validation-panel { margin-top: 18px; padding: 12px; border: 1px solid var(--border-color); border-radius: 8px; }
.interaction-validation-panel > p { margin: 8px 0; color: var(--text-muted); }
.interaction-target-label { display: grid; grid-template-columns: auto minmax(240px, 430px); align-items: center; gap: 8px; margin: 10px 0; font-weight: 700; }
.interaction-target-label select, .interaction-measurement-wrap input, .interaction-measurement-wrap select { min-width: 120px; padding: 6px 7px; border: 1px solid var(--border-color); border-radius: 5px; background: var(--bg-panel); color: inherit; font: inherit; }
.interaction-measurement-wrap input[type="text"] { min-width: 210px; }
.interaction-measurement-wrap input[type="number"] { min-width: 105px; }
.interaction-measurement-remove { padding: 4px 8px; }
.interaction-json-disclosure { margin-top: 10px; border: 1px dashed var(--border-color); border-radius: 7px; }
.interaction-json-disclosure > summary { cursor: pointer; padding: 9px 10px; color: var(--text-muted); font-weight: 600; }
.interaction-json-label { display: grid; gap: 5px; font-weight: 600; }
.interaction-json-label textarea { width: 100%; box-sizing: border-box; resize: vertical; padding: 8px; border: 1px solid var(--border-color); border-radius: 6px; background: var(--bg-panel); color: inherit; font: .78rem ui-monospace, Consolas, monospace; }
.interaction-validation-result { min-height: 3em; max-height: 260px; overflow: auto; margin: 10px 0 0; padding: 10px; border-radius: 6px; background: var(--bg-subtle, #f5f6f8); white-space: pre-wrap; overflow-wrap: anywhere; }
.interaction-flory-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 9px; margin: 10px 0; }
.interaction-flory-grid label { display: grid; gap: 4px; font-weight: 600; }
.interaction-flory-grid input { min-width: 0; padding: 7px 8px; border: 1px solid var(--border-color); border-radius: 5px; background: var(--bg-panel); color: inherit; font: inherit; }
.interaction-flory-result { font-weight: 600; }
.interaction-quantum-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 9px; margin: 10px 0; }
.interaction-quantum-grid label { display: grid; gap: 4px; font-weight: 600; }
.interaction-quantum-grid input, .interaction-quantum-grid select { min-width: 0; padding: 7px 8px; border: 1px solid var(--border-color); border-radius: 5px; background: var(--bg-panel); color: inherit; font: inherit; }
.interaction-quantum-check { display: inline-flex; align-items: center; gap: 7px; margin: 2px 0 10px; }
.interaction-quantum-actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0; }
.interaction-quantum-ranking-wrap { margin-top: 10px; }
@media (max-width: 760px) {
  .interaction-input-grid { grid-template-columns: 1fr; }
  .interaction-section-heading { align-items: stretch; flex-direction: column; }
  .interaction-section-actions { align-items: stretch; flex-direction: column; }
  .interaction-section-actions label { grid-template-columns: 1fr; }
  .interaction-guide-steps { grid-template-columns: 1fr; }
  .interaction-mode-tab span { display: none; }
  .interaction-target-label { grid-template-columns: 1fr; }
}
.raman-sdbs-panel {
  margin-top: 16px;
  padding: 12px;
  border: 1px solid var(--border-color, #c8ccd4);
  border-radius: 8px;
  background: var(--panel-bg, #fff);
}

.raman-sdbs-panel > summary { cursor: pointer; font-weight: 700; }
.raman-sdbs-form { display: grid; gap: 12px; margin-top: 12px; }
.raman-sdbs-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 10px; }
.raman-sdbs-grid label, .raman-sdbs-peaks-label { display: grid; gap: 4px; font-weight: 600; }
.raman-sdbs-grid input, .raman-sdbs-grid select, .raman-sdbs-peaks-label textarea {
  min-width: 0;
  padding: 7px 8px;
  border: 1px solid var(--border-color, #b8bec8);
  border-radius: 5px;
  font: inherit;
  background: var(--input-bg, #fff);
  color: inherit;
}
.raman-sdbs-peaks-label textarea { resize: vertical; font-family: ui-monospace, Consolas, monospace; }
.raman-sdbs-actions { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }
.raman-sdbs-actions [aria-disabled="true"] { opacity: .55; pointer-events: none; }
.raman-sdbs-summary { margin: 10px 0 4px; font-weight: 600; }
.raman-sdbs-summary.is-error { color: #b42318; }
.raman-sdbs-image-fieldset { margin: 0; padding: 10px; border: 1px solid var(--border-color, #c8ccd4); border-radius: 6px; }
.raman-sdbs-image-fieldset legend { padding: 0 5px; font-weight: 700; }
.raman-sdbs-image-viewport { width: 100%; max-height: 520px; overflow: auto; margin-top: 10px; border: 1px solid var(--border-color, #c8ccd4); background: #eef2f7; }
.raman-sdbs-image-viewport[hidden] { display: none; }
.raman-sdbs-image-preview { display: block; width: 100%; height: auto; max-width: none; border: 0; background: #fff; }
.raman-sdbs-image-preview.is-calibrating { cursor: crosshair; outline: 3px solid #2563eb; outline-offset: 2px; }
.raman-sdbs-calibration-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; margin-top: 10px; }
.raman-sdbs-calibration-controls label { display: inline-flex; align-items: center; gap: 6px; margin: 0; }
.raman-sdbs-comparison { margin-top: 14px; padding-top: 10px; border-top: 1px solid var(--border-color, #c8ccd4); }
.raman-sdbs-comparison h4 { margin: 0 0 8px; }
.raman-sdbs-comparison > label { display: grid; gap: 4px; max-width: 420px; font-weight: 600; }
.raman-sdbs-comparison select { padding: 7px 8px; border: 1px solid var(--border-color, #b8bec8); border-radius: 5px; font: inherit; }
.raman-sdbs-search-actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 6px; }
.raman-sdbs-search-help { margin: 4px 0; }
.raman-sdbs-search-help code { user-select: all; overflow-wrap: anywhere; }
.raman-sdbs-workflow { margin: 12px 0; }
.raman-sdbs-workflow ol { display: grid; grid-template-columns: repeat(4, minmax(125px, 1fr)); gap: 8px; padding: 0; margin: 0; list-style: none; }
.raman-sdbs-workflow li { display: flex; gap: 8px; align-items: flex-start; padding: 9px; border: 1px solid var(--border-color, #c8ccd4); border-radius: 7px; opacity: .66; }
.raman-sdbs-workflow li > span { display: grid; place-items: center; flex: 0 0 24px; height: 24px; border-radius: 50%; background: #e5e7eb; color: #374151; font-weight: 700; }
.raman-sdbs-workflow li div { display: grid; gap: 2px; }
.raman-sdbs-workflow li small { line-height: 1.3; }
.raman-sdbs-workflow li.is-current { opacity: 1; border-color: #2563eb; box-shadow: 0 0 0 1px #2563eb inset; }
.raman-sdbs-workflow li.is-current > span { background: #2563eb; color: #fff; }
.raman-sdbs-workflow li.is-complete { opacity: 1; border-color: #18864b; }
.raman-sdbs-workflow li.is-complete > span { background: #18864b; color: #fff; }
.raman-sdbs-workflow li.is-complete > span::after { content: '✓'; }
.raman-sdbs-workflow li.is-complete > span { font-size: 0; }
.raman-sdbs-workflow li.is-complete > span::after { font-size: 14px; }
.raman-sdbs-workflow > p { margin: 8px 0 0; font-weight: 600; }
@media (max-width: 760px) { .raman-sdbs-workflow ol { grid-template-columns: 1fr 1fr; } }
/* Molecular conformer workspace */
#molecular-3d-modal { z-index: 1300; }
#molecular-3d-modal [hidden] { display: none !important; }
.ensemble-panel { margin-top: 20px; padding-top: 16px; border-top: 1px solid #cbd5e1; }
.ensemble-panel input[type="number"] { width: 85px; padding: 5px; }
.ensemble-table { overflow-x: auto; margin: 12px 0; }
.ensemble-table table { width: 100%; border-collapse: collapse; font-size: 12px; }
.ensemble-table th, .ensemble-table td { text-align: left; padding: 7px; border-bottom: 1px solid #dbe2ea; }
#ensemble-curve { width: 100%; background: white; border: 1px solid #dbe2ea; border-radius: 8px; }
#ensemble-curve text { font-size: 12px; fill: #334155; }
#ensemble-peaks .btn { font-size: 12px; }
.modal-container.molecular-3d-content { width: min(1080px, 96vw); max-width: 1080px; max-height: 92vh; overflow-y: auto; }
.molecular-3d-content p { line-height: 1.6; font-size: 13px; }
.molecular-3d-toolbar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.molecular-3d-layout { display: grid; grid-template-columns: minmax(0, 1fr) 245px; gap: 18px; }
#molecular-3d-viewer { position: relative; height: 400px; width: 100%; border-radius: 12px; overflow: hidden; background: #f4f7fb; border: 1px solid #d5dde9; }
.molecular-3d-controls { display: flex; flex-direction: column; gap: 10px; }
.molecular-3d-controls label { display: flex; gap: 8px; flex-wrap: wrap; font-size: 13px; }
.molecular-3d-controls select { width: 100%; }
.molecular-3d-content select { padding: 6px; border: 1px solid #c4cddd; border-radius: 5px; }
.molecular-3d-warning { color: #8b4b05; background: #fff6e5; border-radius: 6px; padding: 8px; }
.molecular-3d-warning:empty { display: none; }
@media (max-width: 700px) {
  .molecular-3d-layout { grid-template-columns: 1fr; }
  #molecular-3d-viewer { height: 300px; }
  .molecular-3d-controls { display: grid; grid-template-columns: 1fr 1fr; }
}