:root {
  --sticky-gap: 0.75rem;
  --app-header-height: 0px;

  --bg: #f5f6f8;
  --panel: #ffffff;
  --panel-alt: #f9fafb;
  --text: #1f2933;
  --muted: #6b7280;
  --border: #d8dde6;

  --accent: #2563eb;
  --accent-soft: #e8f0ff;

  --warning-bg: #fff8e1;
  --warning-border: #f5c542;

  --table-head: #f3f4f6;
  --input-bg: #ffffff;

  --header-bg: rgba(255, 255, 255, 0.92);
  --header-text: var(--text);
  --header-muted: var(--muted);
  --header-border: var(--border);

  --header-button-bg: #ffffff;
  --header-button-hover: var(--accent-soft);
  --header-button-border: var(--border);

  --header-separator: var(--border);
  --toolbar-group-bg: #f8fafc;
  --toolbar-label-bg: #eef2ff;
  --toolbar-label-text: #1d4ed8;

  --pill-bg: #eef2ff;
  --pill-text: #3730a3;

  --radius: 9px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);

  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 14px;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.35;
  color: var(--text);
  background: var(--bg);
}

button,
select,
input,
textarea {
  font: inherit;
}

button {
  border: 1px solid var(--border);
  background: var(--input-bg);
  color: var(--text);
  padding: 0.32rem 0.55rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.88rem;
}

button:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

button:disabled,
select:disabled,
input:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.hidden {
  display: none;
}

/* Header */

.app-header {
  position: sticky;
  top: 0;
  z-index: 20;

  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;

  padding: 0.65rem 1rem;
  background: var(--header-bg);
  color: var(--header-text);
  border-bottom: 1px solid var(--header-border);
  box-shadow: 0 2px 10px rgba(15, 23, 42, 0.06);

  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.app-title h1 {
  margin: 0;
  font-size: 1.12rem;
  line-height: 1.1;
  color: var(--header-text);
}

.subtitle {
  margin: 0.12rem 0 0;
  color: var(--header-muted);
  font-size: 0.82rem;
}

.top-toolbar {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 0.35rem;

  padding: 0.32rem 0.45rem;
  border: 1px solid var(--header-separator);
  border-radius: 8px;
  background: var(--toolbar-group-bg);
}

.toolbar-label {
  display: inline-flex;
  align-items: center;
  align-self: stretch;

  margin: -0.32rem 0.15rem -0.32rem -0.45rem;
  padding: 0 0.5rem;

  border-right: 1px solid var(--header-separator);
  border-radius: 8px 0 0 8px;

  background: var(--toolbar-label-bg);
  color: var(--toolbar-label-text);

  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.055em;
}

.app-header button {
  border-color: var(--header-button-border);
  background: var(--header-button-bg);
  color: var(--header-text);
}

.app-header button:hover {
  border-color: var(--accent);
  background: var(--header-button-hover);
}

/* Main layout */

.app-shell {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: var(--sticky-gap);
  padding: var(--sticky-gap);
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--sticky-gap);

  position: sticky;
  top: calc(var(--app-header-height) + var(--sticky-gap));
  align-self: start;

  max-height: calc(100dvh - var(--app-header-height) - (2 * var(--sticky-gap)));
  overflow-y: auto;
  scrollbar-gutter: stable;

  z-index: 14;
}

.workspace {
  min-width: 0;
}

/* Panels */

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  box-shadow: var(--shadow);
  overflow-x: auto;
}

.panel h2 {
  margin: 0 0 0.55rem;
  font-size: 0.98rem;
}

.panel h3 {
  margin: 1rem 0 0.35rem;
  font-size: 0.9rem;
}

.warning-panel {
  background: var(--warning-bg);
  border-color: var(--warning-border);
}

.tab-page > .panel + .panel {
  margin-top: 0.75rem;
}

/* File dropzone */

.dropzone {
  display: grid;
  gap: 0.35rem;
  padding: 0.75rem;

  text-align: center;
  color: var(--muted);

  border: 2px dashed var(--border);
  border-radius: var(--radius);
}

.dropzone.dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.dropzone strong {
  color: var(--text);
}

/* Meta list */

.meta-list {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.3rem 0.7rem;
  margin: 0.75rem 0 0;
  font-size: 0.85rem;
}

.meta-list dt {
  color: var(--muted);
}

.meta-list dd {
  margin: 0;
}

/* Forms */

label {
  color: var(--muted);
  font-size: 0.82rem;
}

.sidebar label {
  display: block;
  margin: 0.45rem 0;
}

/* Report options grouping */

.report-options-panel .option-group {
  margin-top: 0.65rem;
  padding-top: 0.65rem;
  border-top: 1px solid var(--border);
}

.report-options-panel .option-group:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.option-group-title {
  margin-bottom: 0.35rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.055em;
}

label select,
label input[type="number"] {
  display: block;
  width: 100%;
  margin-top: 0.18rem;
  padding: 0.28rem 0.35rem;

  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--input-bg);
  color: var(--text);

  font-size: 0.88rem;
}

.checkbox-row {
  align-self: end;
  color: var(--text);
}

.checkbox-row input {
  display: inline;
  width: auto;
}

/* Tabs */

.tabs {
  position: sticky;
  top: calc(var(--app-header-height) + var(--sticky-gap));
  z-index: 16;

  display: inline-flex;
  gap: 0.35rem;
  flex-wrap: wrap;

  width: fit-content;
  max-width: 100%;

  margin-bottom: var(--sticky-gap);
  padding: 0.35rem;

  background: color-mix(in srgb, var(--panel) 78%, transparent);
  border: 1px solid color-mix(in srgb, var(--border) 75%, transparent);
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.10);

  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.tab {
  padding: 0.38rem 0.72rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--input-bg) 82%, transparent);
}

.tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.tab-page {
  display: none;
}

.tab-page.active {
  display: block;
}

/* Grids */

.two-column {
  display: grid;
  grid-template-columns: minmax(390px, 0.95fr) minmax(390px, 1.05fr);
  gap: 0.75rem;
  align-items: start;
}

.filter-grid,
.form-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(110px, 1fr));
  gap: 0.55rem;
  margin-bottom: 0.7rem;
}

.form-grid .full {
  grid-column: 1 / -1;
}

.pair-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(130px, 1fr));
  gap: 0.55rem;
}

.search-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(130px, 1fr));
  gap: 0.55rem;
  margin-bottom: 0.7rem;
}

/* Toolbars */

.table-toolbar,
.preview-actions {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin: 0.55rem 0;
}

/* Tables */

.data-table,
.report-preview table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.45rem 0 0.75rem;
  font-size: 0.86rem;
}

.data-table th,
.data-table td,
.report-preview th,
.report-preview td {
  border: 1px solid var(--border);
  padding: 0.28rem 0.4rem;
  vertical-align: top;
}

.data-table th,
.report-preview th {
  background: var(--table-head);
  text-align: left;
  font-weight: 600;
}

.report-preview table:not(:has(thead)) td:first-child {
  min-width: 12rem;
}

th.sortable {
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}

th.sortable:hover {
  background: var(--accent-soft);
}

.number {
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.source-pill {
  display: inline-block;
  padding: 0.08rem 0.35rem;
  border-radius: 999px;

  font-size: 0.72rem;
  background: var(--pill-bg);
  color: var(--pill-text);
}

/* Text hints */

.hint,
.symmetry-note {
  color: var(--muted);
  font-size: 0.84rem;
}

/* Preview */

.preview-panel {
  position: sticky;
  top: calc(var(--app-header-height) + var(--sticky-gap));
}

.preview-header {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: flex-start;
}

.report-preview {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 1rem;
  border-radius: 7px;
  overflow-x: auto;
}

.report-preview h1 {
  margin-top: 0;
  font-size: 1.1rem;
}

.report-preview h2 {
  margin-top: 1rem;
  font-size: 0.95rem;
}

/* Stats and results */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(150px, 1fr));
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.stats-grid div,
.result-box {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.55rem;
  background: var(--panel-alt);
}

.stats-grid span,
.result-box span {
  display: block;
  color: var(--muted);
  font-size: 0.75rem;
}

.stats-grid strong,
.result-box strong {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.95rem;
}

.result-box.primary {
  background: var(--accent-soft);
  border-color: var(--accent);
}

/* Progress */

progress {
  width: 100%;
  height: 0.75rem;
  margin: 0.5rem 0;
}

/* Superscripts */

sup {
  font-size: 0.72em;
  line-height: 0;
}

/* Toast */

.toast {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 100;

  max-width: min(420px, calc(100vw - 2rem));
  padding: 0.65rem 0.85rem;

  color: var(--text);
  background: rgba(239, 246, 255, 0.98);
  border: 1px solid #bfdbfe;
  border-left: 4px solid var(--accent);
  border-radius: 9px;
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.18);

  font-size: 0.88rem;
  font-weight: 500;

  opacity: 0;
  pointer-events: none;
  transform: translateY(0.5rem);
  transition:
    opacity 0.16s ease,
    transform 0.16s ease;

  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.toast.warning {
  background: rgba(255, 248, 225, 0.98);
  border-color: #f5c542;
  border-left-color: #d97706;
  box-shadow: 0 12px 30px rgba(217, 119, 6, 0.18);
}

.toast.error {
  background: rgba(254, 242, 242, 0.98);
  border-color: #fecaca;
  border-left-color: #dc2626;
  box-shadow: 0 12px 30px rgba(220, 38, 38, 0.18);
}

/* Responsive */

@media (max-width: 1150px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .two-column {
    grid-template-columns: 1fr;
  }

  .preview-panel {
    position: static;
  }

  .sidebar {
    position: static;
    max-height: none;
    overflow-y: visible;
  }
}

@media (max-width: 700px) {
  .app-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .top-toolbar {
    width: 100%;
  }

  .toolbar-group {
    flex-wrap: wrap;
  }

  .tabs {
    border-radius: 14px;
  }

  .tab {
    border-radius: 10px;
  }

  .filter-grid,
  .form-grid,
  .search-grid,
  .pair-row,
  .stats-grid,
  #tab-disorder .filter-grid {
    grid-template-columns: 1fr;
  }
}

/* -------------------------------------------------
   Web view table column layout
   Exports / report generation unchanged
   ------------------------------------------------- */

/* Selection page:
   Atoms / Distance and Atoms / Angle = 60:40 */

#selection-tables .data-table {
  table-layout: fixed;
}

#selection-tables .data-table th:first-child,
#selection-tables .data-table td:first-child {
  width: 60%;
}

#selection-tables .data-table th:nth-child(2),
#selection-tables .data-table td:nth-child(2) {
  width: 40%;
}

/* Preview web view:
   only ordinary value tables with table headers = 60:40.
   Geometry report table is excluded because it has many columns. */

.report-preview table:has(thead):not(.geometry-report-table):not(.disorder-report-table):not(.hbond-report-table) {
  table-layout: fixed;
}

.report-preview table:has(thead):not(.geometry-report-table):not(.disorder-report-table):not(.hbond-report-table) th:first-child,
.report-preview table:has(thead):not(.geometry-report-table):not(.disorder-report-table):not(.hbond-report-table) td:first-child {
  width: 60%;
}

.report-preview table:has(thead):not(.geometry-report-table):not(.disorder-report-table):not(.hbond-report-table) th:nth-child(2),
.report-preview table:has(thead):not(.geometry-report-table):not(.disorder-report-table):not(.hbond-report-table) td:nth-child(2) {
  width: 40%;
}

/* H-Bond table inside the report preview */

.report-preview table.hbond-report-table {
  table-layout: fixed;
}

.report-preview table.hbond-report-table th:first-child,
.report-preview table.hbond-report-table td:first-child {
  width: 30%;
}

.report-preview table.hbond-report-table th:nth-child(2),
.report-preview table.hbond-report-table td:nth-child(2),
.report-preview table.hbond-report-table th:nth-child(3),
.report-preview table.hbond-report-table td:nth-child(3),
.report-preview table.hbond-report-table th:nth-child(4),
.report-preview table.hbond-report-table td:nth-child(4),
.report-preview table.hbond-report-table th:nth-child(5),
.report-preview table.hbond-report-table td:nth-child(5) {
  width: 17.5%;
}

/* Geometry table inside the report preview */

.report-preview table.geometry-report-table {
  table-layout: fixed;
  font-size: 0.82rem;
}

.report-preview table.geometry-report-table th:nth-child(1),
.report-preview table.geometry-report-table td:nth-child(1) {
  width: 10%;
}

.report-preview table.geometry-report-table th:nth-child(2),
.report-preview table.geometry-report-table td:nth-child(2) {
  width: 6%;
}

.report-preview table.geometry-report-table th:nth-child(3),
.report-preview table.geometry-report-table td:nth-child(3) {
  width: 22%;
}

.report-preview table.geometry-report-table th:nth-child(4),
.report-preview table.geometry-report-table td:nth-child(4) {
  width: 30%;
}

.report-preview table.geometry-report-table th:nth-child(5),
.report-preview table.geometry-report-table td:nth-child(5),
.report-preview table.geometry-report-table th:nth-child(6),
.report-preview table.geometry-report-table td:nth-child(6),
.report-preview table.geometry-report-table th:nth-child(7),
.report-preview table.geometry-report-table td:nth-child(7),
.report-preview table.geometry-report-table th:nth-child(8),
.report-preview table.geometry-report-table td:nth-child(8) {
  width: 8%;
}

.report-preview table.geometry-report-table td:nth-child(3),
.report-preview table.geometry-report-table td:nth-child(4) {
  overflow-wrap: anywhere;
}

/* Disorder table inside the report preview */

.report-preview table.disorder-report-table {
  table-layout: fixed;
  font-size: 0.80rem;
}

.report-preview table.disorder-report-table th:nth-child(1),
.report-preview table.disorder-report-table td:nth-child(1) {
  width: 8%;
}

.report-preview table.disorder-report-table th:nth-child(2),
.report-preview table.disorder-report-table td:nth-child(2) {
  width: 6%;
}

.report-preview table.disorder-report-table th:nth-child(3),
.report-preview table.disorder-report-table td:nth-child(3) {
  width: 10%;
}

.report-preview table.disorder-report-table th:nth-child(4),
.report-preview table.disorder-report-table td:nth-child(4) {
  width: 18%;
}

.report-preview table.disorder-report-table th:nth-child(5),
.report-preview table.disorder-report-table td:nth-child(5) {
  width: 14%;
}

.report-preview table.disorder-report-table th:nth-child(6),
.report-preview table.disorder-report-table td:nth-child(6) {
  width: 14%;
}

.report-preview table.disorder-report-table th:nth-child(7),
.report-preview table.disorder-report-table td:nth-child(7) {
  width: 12%;
}

.report-preview table.disorder-report-table th:nth-child(8),
.report-preview table.disorder-report-table td:nth-child(8) {
  width: 18%;
}

.report-preview table.disorder-report-table td:nth-child(4),
.report-preview table.disorder-report-table td:nth-child(5),
.report-preview table.disorder-report-table td:nth-child(6),
.report-preview table.disorder-report-table td:nth-child(7),
.report-preview table.disorder-report-table td:nth-child(8) {
  overflow-wrap: anywhere;
}

.report-preview table.disorder-report-table .number {
  white-space: nowrap;
}

/* Average page:
   upper and lower tables use identical column widths */

#average-bonds .data-table,
#average-angles .data-table {
  table-layout: fixed;
}

#average-bonds .data-table th:nth-child(1),
#average-bonds .data-table td:nth-child(1),
#average-angles .data-table th:nth-child(1),
#average-angles .data-table td:nth-child(1) {
  width: 34%;
}

#average-bonds .data-table th:nth-child(2),
#average-bonds .data-table td:nth-child(2),
#average-angles .data-table th:nth-child(2),
#average-angles .data-table td:nth-child(2) {
  width: 10%;
}

#average-bonds .data-table th:nth-child(3),
#average-bonds .data-table td:nth-child(3),
#average-angles .data-table th:nth-child(3),
#average-angles .data-table td:nth-child(3) {
  width: 16%;
}

#average-bonds .data-table th:nth-child(4),
#average-bonds .data-table td:nth-child(4),
#average-angles .data-table th:nth-child(4),
#average-angles .data-table td:nth-child(4) {
  width: 24%;
}

#average-bonds .data-table th:nth-child(5),
#average-bonds .data-table td:nth-child(5),
#average-angles .data-table th:nth-child(5),
#average-angles .data-table td:nth-child(5) {
  width: 16%;
}

/* Better wrapping for long atom strings and ranges */

.data-table td,
.report-preview td {
  overflow-wrap: anywhere;
}

/* -------------------------------------------------
   Disorder Helper tab
   ------------------------------------------------- */

#tab-disorder .filter-grid {
  grid-template-columns: repeat(2, minmax(150px, max-content));
  align-items: end;
}

.disorder-table {
  table-layout: fixed;
}

.disorder-table th:nth-child(1),
.disorder-table td:nth-child(1) {
  width: 8%;
}

.disorder-table th:nth-child(2),
.disorder-table td:nth-child(2) {
  width: 6%;
}

.disorder-table th:nth-child(3),
.disorder-table td:nth-child(3) {
  width: 10%;
}

.disorder-table th:nth-child(4),
.disorder-table td:nth-child(4) {
  width: 17%;
}

.disorder-table th:nth-child(5),
.disorder-table td:nth-child(5) {
  width: 15%;
}

.disorder-table th:nth-child(6),
.disorder-table td:nth-child(6) {
  width: 12%;
}

.disorder-table th:nth-child(7),
.disorder-table td:nth-child(7) {
  width: 12%;
}

.disorder-table th:nth-child(8),
.disorder-table td:nth-child(8) {
  width: 20%;
}

.disorder-table td:nth-child(4),
.disorder-table td:nth-child(5),
.disorder-table td:nth-child(6),
.disorder-table td:nth-child(7),
.disorder-table td:nth-child(8) {
  overflow-wrap: anywhere;
}

.disorder-moiety-input,
.disorder-comment-input {
  width: 100%;
  min-width: 0;

  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--input-bg);
  color: var(--text);

  font-size: 0.84rem;
}

.disorder-moiety-input {
  padding: 0.25rem 0.35rem;
}

.disorder-comment-input {
  display: block;
  min-height: 3.2rem;
  padding: 0.35rem;
  resize: vertical;
  line-height: 1.3;
}

.disorder-moiety-input:focus,
.disorder-comment-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 22%, transparent);
}

/* -------------------------------------------------
   Geometry Parameters tab
   ------------------------------------------------- */

#tab-geometry .filter-grid {
  grid-template-columns: repeat(2, minmax(130px, 1fr));
}

/* Ligand table in Geometry tab */

.geometry-ligand-table {
  table-layout: fixed;
}

.geometry-ligand-table th:nth-child(1),
.geometry-ligand-table td:nth-child(1) {
  width: 3.5rem;
  text-align: center;
}

.geometry-ligand-table th:nth-child(2),
.geometry-ligand-table td:nth-child(2) {
  width: 28%;
}

.geometry-ligand-table th:nth-child(3),
.geometry-ligand-table td:nth-child(3) {
  width: 24%;
}

.geometry-ligand-table th:nth-child(4),
.geometry-ligand-table td:nth-child(4) {
  width: auto;
}

/* Results table in Geometry tab */

.geometry-results-table {
  table-layout: fixed;
}

.geometry-results-table th:nth-child(1),
.geometry-results-table td:nth-child(1) {
  width: 10%;
}

.geometry-results-table th:nth-child(2),
.geometry-results-table td:nth-child(2) {
  width: 6%;
  text-align: center;
}

.geometry-results-table th:nth-child(3),
.geometry-results-table td:nth-child(3) {
  width: 25%;
}

.geometry-results-table th:nth-child(4),
.geometry-results-table td:nth-child(4) {
  width: 30%;
}

.geometry-results-table th:nth-child(5),
.geometry-results-table td:nth-child(5),
.geometry-results-table th:nth-child(6),
.geometry-results-table td:nth-child(6),
.geometry-results-table th:nth-child(7),
.geometry-results-table td:nth-child(7),
.geometry-results-table th:nth-child(8),
.geometry-results-table td:nth-child(8) {
  width: 7%;
}

.geometry-results-table th:nth-child(9),
.geometry-results-table td:nth-child(9) {
  width: 8%;
}

.geometry-results-table td:nth-child(3),
.geometry-results-table td:nth-child(4) {
  overflow-wrap: anywhere;
}

.geometry-results-table .number,
.geometry-ligand-table .number,
.disorder-table .number,
.report-preview table.geometry-report-table .number,
.report-preview table.disorder-report-table .number,
.report-preview table.hbond-report-table .number {
  white-space: nowrap;
}

/* -------------------------------------------------
   Multi-block CIF picker
   ------------------------------------------------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 17, 21, 0.5);
  z-index: 100;
  padding: 1rem;
}

.modal-overlay.hidden {
  display: none;
}

.modal {
  width: 100%;
  max-width: 30rem;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.2rem 1.4rem;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
}

.modal h2 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.modal-hint {
  margin: 0 0 0.8rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.block-picker-list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  overflow-y: auto;
  padding-right: 0.2rem;
  margin-bottom: 0.9rem;
}

.block-picker-item {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.88rem;
}

.block-picker-item:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.block-picker-item input {
  flex-shrink: 0;
  margin-top: 0.2rem;
}

.block-picker-name {
  font-weight: 600;
  white-space: nowrap;
}

.block-picker-formula {
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.modal-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.modal-actions-right {
  display: flex;
  gap: 0.5rem;
}

/* -------------------------------------------------
   Dark mode
   ------------------------------------------------- */

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --panel: #111827;
    --panel-alt: #0b1220;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --border: #374151;

    --accent: #60a5fa;
    --accent-soft: #1e3a5f;

    --warning-bg: #33280c;
    --warning-border: #a16207;

    --table-head: #1f2937;
    --input-bg: #0f172a;

    --header-bg: rgba(15, 23, 42, 0.94);
    --header-text: #e5e7eb;
    --header-muted: #94a3b8;
    --header-border: #334155;

    --header-button-bg: #1f2937;
    --header-button-hover: #243244;
    --header-button-border: #374151;

    --header-separator: #334155;
    --toolbar-group-bg: rgba(255, 255, 255, 0.04);
    --toolbar-label-bg: rgba(96, 165, 250, 0.16);
    --toolbar-label-text: #bfdbfe;

    --pill-bg: #1e3a8a;
    --pill-text: #dbeafe;

    --shadow: 0 1px 3px rgba(0, 0, 0, 0.35);

    color-scheme: dark;
  }

  .app-header {
    box-shadow: 0 2px 14px rgba(0, 0, 0, 0.38);
  }

  .tabs {
    background: rgba(17, 24, 39, 0.72);
    border-color: rgba(55, 65, 81, 0.75);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);

    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
  }

  .tab {
    background: rgba(15, 23, 42, 0.72);
    border-color: rgba(55, 65, 81, 0.85);
    color: var(--text);
  }

  .tab:hover {
    background: rgba(30, 58, 95, 0.82);
    border-color: var(--accent);
  }

  .tab.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #0f172a;
  }

  .toast {
    color: var(--text);
    background: rgba(17, 24, 39, 0.96);
    border-color: var(--border);
    border-left-color: var(--accent);
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.4);
  }

  .toast.warning {
    background: rgba(51, 40, 12, 0.96);
    border-color: #a16207;
    border-left-color: #f59e0b;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.4);
  }

  .toast.error {
    background: rgba(69, 10, 10, 0.96);
    border-color: #7f1d1d;
    border-left-color: #ef4444;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.4);
  }
}