:root {
  color-scheme: dark;
  --bg: #080a0a;
  --bg-2: #111412;
  --surface: #151817;
  --surface-2: #1d2522;
  --surface-3: #241f17;
  --text: #f5f1e8;
  --muted: #adaaa1;
  --line: rgba(243, 240, 232, 0.14);
  --strong-line: rgba(243, 240, 232, 0.26);
  --amber: #e8bc55;
  --teal: #52c7b8;
  --green: #80c96a;
  --red: #ef6b61;
  --blue: #7ea7d8;
  --wine: #c87991;
  --ink: #0b0c0d;
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.32);
  --radius: 8px;
}

body.light-mode {
  color-scheme: light;
  --bg: #f6f3ea;
  --bg-2: #ece5d6;
  --surface: #fffdf7;
  --surface-2: #f1eadc;
  --surface-3: #fff4d5;
  --text: #171614;
  --muted: #625d52;
  --line: rgba(23, 22, 20, 0.14);
  --strong-line: rgba(23, 22, 20, 0.24);
  --ink: #fffdf7;
  --shadow: 0 18px 50px rgba(63, 51, 24, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  line-height: 1.55;
  background:
    linear-gradient(rgba(255, 255, 255, 0.024) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(120deg, rgba(82, 199, 184, 0.045), transparent 36%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  background-size: 42px 42px, 42px 42px, auto, auto;
}

body.light-mode {
  background:
    linear-gradient(rgba(0, 0, 0, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 0, 0, 0.035) 1px, transparent 1px),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  background-size: 38px 38px, 38px 38px, auto;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  cursor: pointer;
}

.container {
  width: min(1220px, calc(100% - 32px));
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 12px;
  z-index: 100;
  background: var(--amber);
  color: #171614;
  padding: 10px 12px;
  border-radius: var(--radius);
  font-weight: 800;
}

.skip-link:focus {
  left: 12px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(18px);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  border-bottom: 1px solid var(--line);
}

.nav-shell {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  padding: 10px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(232, 188, 85, 0.55);
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--amber), #f4e2a0);
  color: #171614;
  font-weight: 900;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.15;
}

.site-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: nowrap;
  gap: 2px;
  min-width: 0;
}

.site-nav a {
  color: var(--muted);
  padding: 7px 7px;
  border-radius: 6px;
  font-size: 0.82rem;
  line-height: 1.1;
  white-space: nowrap;
  transition: color 160ms ease, background 160ms ease, transform 160ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-1px);
}

.site-nav a[aria-current] {
  color: var(--text);
  background: rgba(255, 255, 255, 0.07);
}

.header-actions {
  display: flex;
  gap: 6px;
  align-items: center;
}

.search-shell {
  display: grid;
  grid-template-columns: auto 150px;
  gap: 7px;
  align-items: center;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius);
  padding: 5px 7px;
  color: var(--muted);
  font-size: 0.86rem;
}

.search-shell input {
  width: 100%;
  border: 0;
  padding: 5px 0;
  color: var(--text);
  background: transparent;
  outline: 0;
}

.search-results {
  display: none;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  padding-bottom: 12px;
}

.search-results.active {
  display: grid;
}

.search-hit {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 8px 10px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 10px;
  transition: border-color 160ms ease, transform 160ms ease, background 160ms ease;
}

.search-hit:hover,
.search-hit:focus-visible {
  border-color: var(--strong-line);
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-1px);
}

.search-hit img {
  grid-row: 1 / span 3;
  width: 54px;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.04);
  object-fit: cover;
}

.search-hit span {
  color: var(--amber);
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
}

.search-hit strong {
  display: block;
  margin-top: 3px;
}

.icon-button,
.small-button,
.primary-button,
.secondary-button,
.text-button,
.segmented button,
.calculator-tabs button {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-height: 38px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  transition:
    transform 150ms ease,
    border-color 150ms ease,
    background 150ms ease,
    box-shadow 150ms ease,
    opacity 150ms ease;
}

.primary-button,
.secondary-button,
.small-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 13px;
  font-weight: 800;
}

.primary-button {
  border-color: transparent;
  background: var(--amber);
  color: #171614;
}

.primary-button:hover,
.primary-button:focus-visible {
  box-shadow: 0 8px 20px rgba(232, 188, 85, 0.18);
  transform: translateY(-1px);
}

.secondary-button:hover,
.small-button:hover,
.text-button:hover,
.segmented button:hover,
.calculator-tabs button:hover {
  border-color: var(--strong-line);
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-1px);
}

.icon-button:active,
.small-button:active,
.primary-button:active,
.secondary-button:active,
.text-button:active,
.segmented button:active,
.calculator-tabs button:active,
.site-nav a:active,
.search-hit:active {
  transform: translateY(0);
}

.small-button[hidden],
.primary-button[hidden],
.secondary-button[hidden] {
  display: none;
}

.text-button {
  min-height: 32px;
  padding: 4px 8px;
  color: var(--muted);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 38px;
  padding: 9px;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  margin: 4px 0;
  background: var(--text);
}

.workspace-hero {
  padding: 62px 0 44px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.94fr) minmax(420px, 1.06fr);
  gap: 30px;
  align-items: stretch;
}

.hero-copy {
  align-self: center;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0 0 16px;
  font-size: 4.7rem;
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: 2.35rem;
  line-height: 1.1;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
}

.lead {
  max-width: 680px;
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 1.12rem;
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin-top: 26px;
}

.metric-strip div,
.score-grid div,
.command-grid div {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.045);
  padding: 12px;
}

.metric-strip strong,
.score-grid strong,
.command-grid strong {
  display: block;
  color: var(--amber);
  font-size: 1.35rem;
  line-height: 1.1;
}

.metric-strip span,
.score-grid span,
.label,
.command-grid span {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
}

.command-panel,
.control-panel,
.library-panel,
.detail-card,
.compare-card,
.mechanism-detail,
.table-card,
.calculator-shell,
.quiz-card,
.notes-panel,
.safety-section {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.035), transparent 42%),
    color-mix(in srgb, var(--surface) 92%, transparent);
  box-shadow: var(--shadow);
}

.command-panel {
  overflow: hidden;
}

.panel-toolbar {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 12px 14px;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.panel-toolbar code {
  margin-left: auto;
  color: var(--amber);
}

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 14px var(--green);
}

#moleculeCanvas {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #0d0f0e;
}

body.light-mode #moleculeCanvas {
  background: #f0eadc;
}

.command-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding: 10px;
}

.section {
  padding: 66px 0;
}

.section-tint {
  background:
    linear-gradient(90deg, rgba(232, 188, 85, 0.035), transparent 34%),
    rgba(255, 255, 255, 0.024);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 520px);
  gap: 26px;
  align-items: end;
  margin-bottom: 24px;
}

.section-heading p:last-child {
  margin: 0;
  color: var(--muted);
}

.workbench-layout {
  display: grid;
  grid-template-columns: 270px minmax(0, 1fr) 330px;
  gap: 14px;
  align-items: start;
}

.control-panel,
.library-panel,
.detail-card,
.compare-card,
.mechanism-detail,
.table-card,
.calculator-shell,
.quiz-card,
.notes-panel {
  padding: 16px;
}

label {
  display: block;
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  margin: 0 0 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.045);
  color: var(--text);
  outline: 0;
  padding: 11px 12px;
}

select {
  appearance: none;
}

textarea {
  min-height: 132px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--amber);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--amber) 20%, transparent);
}

.route-planner {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.route-output {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
  padding: 12px;
  color: var(--muted);
  min-height: 58px;
}

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

.academic-grid {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr) 320px;
  gap: 14px;
  align-items: stretch;
}

.scholar-panel {
  padding: 18px;
  min-width: 0;
}

.concept-list {
  display: grid;
  gap: 8px;
  max-height: 430px;
  overflow: auto;
  padding-right: 2px;
}

.concept-item {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.045);
  color: var(--text);
  padding: 12px;
  text-align: left;
}

.concept-item span,
.source-card span {
  display: block;
  color: var(--teal);
  font-size: 0.74rem;
  font-weight: 900;
  text-transform: uppercase;
}

.concept-item strong {
  display: block;
  margin-top: 3px;
}

.concept-item.selected {
  border-color: var(--amber);
  background: color-mix(in srgb, var(--amber) 12%, var(--surface));
}

.paper-head {
  display: grid;
  gap: 8px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 14px;
}

.paper-head h3 {
  margin: 0;
  font-size: 1.55rem;
}

.paper-head code {
  display: inline-flex;
  width: fit-content;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.05);
  color: var(--amber);
  padding: 6px 8px;
}

.paper-block {
  border-left: 3px solid var(--teal);
  padding: 8px 0 8px 12px;
  margin: 12px 0;
  background: linear-gradient(90deg, color-mix(in srgb, var(--teal) 9%, transparent), transparent);
}

.paper-block p {
  margin: 4px 0 0;
  color: var(--muted);
}

.reference-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: 16px;
}

.reference-list a,
.source-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
  padding: 12px;
}

.reference-list a strong,
.reference-list a span,
.source-card strong,
.source-card small {
  display: block;
}

.reference-list a span,
.source-card p,
.source-card small {
  color: var(--muted);
}

.matrix-head {
  display: grid;
  gap: 4px;
  margin-bottom: 12px;
}

.evidence-ladder {
  display: grid;
  gap: 9px;
}

.evidence-step {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.035);
  padding: 10px;
}

.evidence-step > span {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius);
  background: var(--amber);
  color: #171614;
  font-weight: 900;
}

.evidence-step p {
  margin: 3px 0;
  color: var(--muted);
}

.evidence-step small {
  color: var(--teal);
}

.source-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.source-card {
  min-height: 154px;
}

.source-card strong {
  margin: 4px 0 8px;
  color: var(--text);
}

.source-card p {
  margin: 0 0 10px;
  font-size: 0.92rem;
}

.dossier-console {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr) minmax(280px, 0.85fr);
  gap: 14px;
  align-items: stretch;
}

.dossier-spotlight,
.method-ledger,
.publication-queue,
.dossier-manuscript {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(145deg, rgba(82, 199, 184, 0.055), transparent 38%),
    color-mix(in srgb, var(--surface) 93%, transparent);
  box-shadow: var(--shadow);
  padding: 18px;
  min-width: 0;
}

.spotlight-head,
.ledger-head {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: start;
  margin-bottom: 12px;
}

.spotlight-head h3 {
  margin: 8px 0 0;
  font-size: 1.55rem;
}

.spotlight-head > strong {
  display: grid;
  place-items: center;
  min-width: 64px;
  height: 64px;
  border: 1px solid color-mix(in srgb, var(--amber) 45%, transparent);
  border-radius: var(--radius);
  color: var(--amber);
  background: color-mix(in srgb, var(--amber) 9%, transparent);
  font-size: 1.2rem;
}

.method-list,
.queue-list,
.instrument-list {
  display: grid;
  gap: 10px;
}

.method-card,
.queue-item,
.instrument-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.035);
  padding: 12px;
}

.method-card span,
.queue-item span {
  display: block;
  color: var(--teal);
  font-size: 0.74rem;
  font-weight: 900;
  text-transform: uppercase;
}

.method-card strong,
.queue-item strong,
.instrument-card strong {
  display: block;
  margin: 3px 0 6px;
}

.method-card p,
.instrument-card p,
.instrument-card small {
  color: var(--muted);
}

.method-card p,
.instrument-card p {
  margin: 0 0 9px;
}

.queue-item small {
  color: var(--muted);
}

.priority-high {
  color: var(--wine) !important;
}

.priority-medium {
  color: var(--amber) !important;
}

.mini-meter {
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  overflow: hidden;
}

.mini-meter span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--teal), var(--amber));
}

.linked-records {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.dossier-page-layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr) 320px;
  gap: 14px;
  align-items: start;
}

.methods-page-layout,
.spectroscopy-page-layout,
.materials-page-layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr) 340px;
  gap: 14px;
  align-items: start;
}

.dossier-side {
  display: grid;
  gap: 14px;
}

.manuscript-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 126px;
  gap: 18px;
  align-items: start;
  padding-bottom: 18px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.manuscript-head h2 {
  margin-top: 8px;
}

.manuscript-head p {
  color: var(--muted);
  margin-bottom: 0;
}

.readiness-gauge {
  display: grid;
  place-items: center;
  gap: 4px;
  min-height: 126px;
  border: 1px solid color-mix(in srgb, var(--amber) 45%, transparent);
  border-radius: var(--radius);
  background:
    linear-gradient(0deg, color-mix(in srgb, var(--amber) 18%, transparent) var(--value), transparent var(--value)),
    rgba(255, 255, 255, 0.035);
  text-align: center;
}

.readiness-gauge span {
  display: none;
}

.readiness-gauge strong {
  color: var(--amber);
  font-size: 1.65rem;
}

.readiness-gauge small {
  color: var(--muted);
  text-transform: uppercase;
  font-size: 0.72rem;
  font-weight: 900;
}

.manuscript-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 16px 0 12px;
}

.method-snapshot-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.85fr) minmax(0, 1fr);
  gap: 14px;
  align-items: stretch;
}

.materials-home-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.material-preview-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(145deg, rgba(82, 199, 184, 0.06), transparent 46%),
    color-mix(in srgb, var(--surface) 93%, transparent);
  box-shadow: var(--shadow);
  padding: 16px;
  min-height: 188px;
}

.material-preview-card span {
  color: var(--teal);
  font-size: 0.74rem;
  font-weight: 900;
  text-transform: uppercase;
}

.material-preview-card strong,
.material-preview-card small {
  display: block;
}

.material-preview-card strong {
  margin: 8px 0;
  font-size: 1.12rem;
}

.material-preview-card p,
.material-preview-card small {
  color: var(--muted);
}

.signal-matrix {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.signal-matrix.compact {
  grid-template-columns: 1fr;
}

.signal-matrix article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.035);
  padding: 12px;
}

.signal-matrix strong,
.signal-matrix small {
  display: block;
}

.signal-matrix p,
.signal-matrix small {
  color: var(--muted);
}

.ledger-table {
  display: grid;
  gap: 8px;
}

.ledger-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 8px;
}

.ledger-row span {
  color: var(--muted);
}

.state-complete {
  color: var(--green);
}

.state-partial {
  color: var(--amber);
}

.state-missing {
  color: var(--wine);
}

.library-toolbar,
.compare-head,
.quiz-topline {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 14px;
}

.segmented,
.calculator-tabs {
  display: inline-flex;
  gap: 5px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.035);
}

.segmented button,
.calculator-tabs button {
  min-height: 32px;
  padding: 6px 10px;
  color: var(--muted);
}

.segmented button.active,
.calculator-tabs button.active {
  color: #171614;
  background: var(--amber);
  border-color: transparent;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.card-grid.dense {
  grid-template-columns: 1fr;
}

.data-card,
.mechanism-card,
.element-tile,
.note-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.045);
  padding: 14px;
  min-width: 0;
}

.data-card {
  display: grid;
  gap: 10px;
  min-height: 238px;
}

.data-card.selected,
.mechanism-card.selected,
.element-tile.selected {
  border-color: var(--amber);
  background: color-mix(in srgb, var(--amber) 12%, var(--surface));
}

.data-card h3,
.mechanism-card h3,
.element-tile h3,
.note-card h3 {
  margin: 0 0 4px;
}

.formula {
  color: var(--amber);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-weight: 900;
}

.tag-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  border: 1px solid color-mix(in srgb, var(--teal) 45%, transparent);
  border-radius: 6px;
  color: var(--teal);
  background: color-mix(in srgb, var(--teal) 10%, transparent);
  padding: 3px 7px;
  font-size: 0.75rem;
  font-weight: 800;
}

.risk-standard {
  color: var(--green);
}

.risk-dry,
.risk-oxidizer {
  color: var(--amber);
}

.risk-corrosive {
  color: var(--red);
}

.detail-list {
  display: grid;
  gap: 10px;
  padding-left: 18px;
  margin: 8px 0 14px;
}

.detail-list li {
  color: var(--muted);
}

.compare-table {
  display: grid;
  gap: 8px;
}

.compare-row {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 9px;
  background: rgba(255, 255, 255, 0.035);
}

.mechanism-layout {
  display: grid;
  grid-template-columns: 360px minmax(0, 1fr);
  gap: 14px;
}

.mechanism-list {
  display: grid;
  gap: 9px;
}

.mechanism-card {
  text-align: left;
  color: var(--text);
}

.step-list {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.step-item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  background: rgba(255, 255, 255, 0.035);
}

.step-item span {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius);
  background: var(--amber);
  color: #171614;
  font-weight: 900;
}

.spectra-layout,
.element-layout {
  display: grid;
  grid-template-columns: 310px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.table-card {
  overflow-x: auto;
}

table {
  width: 100%;
  min-width: 740px;
  border-collapse: collapse;
}

th,
td {
  padding: 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--amber);
  background: rgba(255, 255, 255, 0.045);
  font-size: 0.84rem;
}

td {
  color: var(--muted);
}

td strong {
  color: var(--text);
}

.calculator-tabs {
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.calculator-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 14px;
}

.calc-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.calc-field.full {
  grid-column: 1 / -1;
}

.calc-output {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  background: rgba(255, 255, 255, 0.035);
}

#calculatorOutput {
  margin: 8px 0 14px;
  color: var(--muted);
  min-height: 88px;
}

#calculatorOutput strong {
  display: block;
  color: var(--amber);
  font-size: 1.55rem;
  margin-bottom: 7px;
}

.history-list {
  display: grid;
  gap: 8px;
}

.history-item {
  border-top: 1px solid var(--line);
  padding-top: 8px;
  color: var(--muted);
  font-size: 0.88rem;
}

.study-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 14px;
}

.quiz-card h3 {
  min-height: 72px;
  font-size: 1.4rem;
}

.quiz-options {
  display: grid;
  gap: 9px;
  margin: 16px 0;
}

.quiz-option {
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.045);
  color: var(--text);
  padding: 12px;
  text-align: left;
}

.quiz-option.correct {
  border-color: var(--green);
  background: color-mix(in srgb, var(--green) 16%, transparent);
}

.quiz-option.wrong {
  border-color: var(--red);
  background: color-mix(in srgb, var(--red) 14%, transparent);
}

.score-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 8px 0 14px;
}

.element-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 9px;
}

.element-tile {
  min-height: 116px;
  text-align: left;
  color: var(--text);
}

.element-symbol {
  display: block;
  color: var(--amber);
  font-size: 2rem;
  font-weight: 900;
  line-height: 1;
}

.element-meta {
  color: var(--muted);
  font-size: 0.84rem;
}

.notebook-layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr) 330px;
  gap: 14px;
  align-items: start;
}

.notes-panel {
  display: grid;
  gap: 10px;
  min-height: 260px;
}

.note-card p {
  color: var(--muted);
  margin: 0 0 10px;
}

.safety-section {
  border-left: 0;
  border-right: 0;
  border-radius: 0;
  box-shadow: none;
}

.safety-grid {
  display: grid;
  grid-template-columns: 360px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.safety-copy {
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-links a {
  color: var(--muted);
  padding: 8px 9px;
}

.site-version {
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: color-mix(in srgb, var(--bg) 92%, #000 8%);
  padding: 10px 22px;
  text-align: center;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
}

.empty-state {
  color: var(--muted);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  padding: 14px;
}

@media (max-width: 1080px) {
  .hero-grid,
  .academic-grid,
  .workbench-layout,
  .notebook-layout,
  .dossier-console,
  .dossier-page-layout,
  .methods-page-layout,
  .spectroscopy-page-layout,
  .materials-page-layout,
  .method-snapshot-grid,
  .materials-home-grid {
    grid-template-columns: 1fr;
  }

  .source-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .detail-panel {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 0.7fr);
    gap: 14px;
  }

  .card-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .element-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 1320px) {
  .nav-shell {
    grid-template-columns: auto auto;
  }

  .menu-toggle {
    display: block;
    justify-self: end;
  }

  .site-nav,
  .header-actions {
    display: none;
    grid-column: 1 / -1;
  }

  .site-header.nav-open .site-nav,
  .site-header.nav-open .header-actions {
    display: grid;
  }

  .site-nav {
    grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
    justify-content: stretch;
    gap: 4px;
  }

  .site-nav a {
    border: 1px solid var(--line);
    padding: 10px 11px;
  }

  .header-actions {
    grid-template-columns: 1fr auto;
  }

  .search-shell {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .search-results.active {
    grid-template-columns: 1fr 1fr;
  }

  h1 {
    font-size: 3.45rem;
  }

  h2 {
    font-size: 1.9rem;
  }

  .section-heading,
  .academic-grid,
  .mechanism-layout,
  .spectra-layout,
  .element-layout,
  .calculator-grid,
  .study-layout,
  .safety-grid,
  .detail-panel,
  .manuscript-head,
  .manuscript-grid,
  .signal-matrix {
    grid-template-columns: 1fr;
  }

  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .metric-strip,
  .command-grid,
  .source-strip,
  .element-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .container {
    width: min(100% - 22px, 1220px);
  }

  h1 {
    font-size: 2.65rem;
  }

  .workspace-hero {
    padding-top: 34px;
  }

  .metric-strip,
  .command-grid,
  .card-grid,
  .calc-panel,
  .score-grid,
  .reference-list,
  .source-strip,
  .element-grid,
  .search-results.active,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-actions {
    grid-template-columns: 1fr;
  }

  .site-nav {
    grid-template-columns: 1fr;
  }
}