@charset "UTF-8";

:root {
  --bg-obsidian: #120f0d;
  --bg-plinth: #191512;
  --bg-elevated: #221c18;
  --ink-ivory: #f2ece1;
  --ink-muted: #b6aa9b;
  --ink-subtle: #85786b;
  --line-dark: #382e28;
  --line-faint: #29211d;
  --son-vermilion: #c43828;
  --son-vermilion-deep: #962619;
  --gold-leaf: #d1a353;
  --amber-sheen: #8c4820;
  --paper-do: #ebe3d3;
  --paper-card: #f4eee2;
  --paper-ink: #1d1714;
  --paper-muted: #5a4e46;
  --paper-line: #cfc3af;
  --gutter: clamp(1.25rem, 4vw, 4.5rem);
  --font-sans: 'Be Vietnam Pro', system-ui, -apple-system, sans-serif;
  --font-serif: Georgia, 'Times New Roman', serif;
  --font-mono: 'Courier New', Courier, monospace;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  color-scheme: dark;
  scrollbar-gutter: stable;
  scrollbar-color: var(--gold-leaf) var(--bg-obsidian);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-block-start: 2rem;
}

body {
  margin: 0;
  background-color: var(--bg-obsidian);
  color: var(--ink-ivory);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

body:has(dialog[open]) {
  overflow: hidden;
}

h1, h2, h3, h4, p, figure, dl, dd, ol, ul {
  margin: 0;
}

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

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

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

button {
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  touch-action: manipulation;
}

button, a, input, textarea {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--gold-leaf);
  outline-offset: 4px;
}

img, canvas {
  display: block;
  max-inline-size: 100%;
  block-size: auto;
}

::selection {
  background: var(--son-vermilion);
  color: var(--ink-ivory);
}

[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  inset-block-start: 0.75rem;
  inset-inline-start: 0.75rem;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  background: var(--ink-ivory);
  color: var(--bg-obsidian);
  font-size: 0.875rem;
  font-weight: 600;
  transform: translateY(-200%);
  transition: transform 0.2s var(--ease-out);
}

.skip-link:focus {
  transform: translateY(0);
}

/* TOP PROPOSAL BAR */
.proposal-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.5rem;
  padding-inline: var(--gutter);
  background: #0c0a09;
  border-block-end: 1px solid var(--line-faint);
  font-size: 0.75rem;
  color: var(--ink-muted);
}

.proposal-back {
  display: inline-flex;
  align-items: center;
  min-block-size: 2rem;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.proposal-back:hover {
  color: var(--ink-ivory);
}

.proposal-context {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  color: var(--ink-subtle);
}

.proposal-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-block-size: 2rem;
  padding-inline: 0.6rem;
  border: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--ink-muted);
}

.lang-switch .is-active {
  color: var(--gold-leaf);
  font-weight: 700;
}

/* SITE HEADER */
.site-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 2rem;
  padding-block: 1.5rem;
  padding-inline: var(--gutter);
  border-block-end: 1px solid var(--line-dark);
  background: color-mix(in oklab, var(--bg-obsidian) 92%, transparent);
  position: sticky;
  inset-block-start: 0;
  z-index: 30;
  backdrop-filter: blur(10px);
}

.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 0.85rem;
}

.wordmark-main {
  font-family: var(--font-serif);
  font-size: clamp(1.85rem, 2.6vw, 2.35rem);
  letter-spacing: -0.04em;
  line-height: 1;
}

.wordmark-sub {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2rem;
  font-size: 0.875rem;
  color: var(--ink-muted);
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  min-block-size: 2.75rem;
  transition: color 0.2s;
}

.site-nav a:hover {
  color: var(--ink-ivory);
  text-decoration: underline;
  text-underline-offset: 6px;
}

.shortlist-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  min-block-size: 2.75rem;
  padding-inline: 1rem;
  border: 1px solid var(--line-dark);
  background: var(--bg-plinth);
  font-size: 0.8125rem;
  transition: border-color 0.2s, background-color 0.2s;
}

.shortlist-trigger:hover {
  border-color: var(--gold-leaf);
  background: var(--bg-elevated);
}

.shortlist-count {
  display: inline-grid;
  place-items: center;
  min-inline-size: 1.4rem;
  block-size: 1.4rem;
  padding-inline: 0.3rem;
  background: var(--son-vermilion);
  color: var(--ink-ivory);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
}

/* COMMON LABELS & HEADINGS */
.eyebrow,
.mono-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.09em;
  color: var(--gold-leaf);
  text-transform: uppercase;
}

.mono-muted {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-muted);
  font-variant-numeric: tabular-nums;
}

.pulse-dot {
  display: inline-block;
  inline-size: 0.45rem;
  block-size: 0.45rem;
  border-radius: 50%;
  background: var(--son-vermilion);
  margin-inline-end: 0.55rem;
  vertical-align: middle;
}

/* SECTION 01: HERO & INTERACTIVE SANDING WORKBENCH */
.hero-studio {
  max-inline-size: 1560px;
  margin-inline: auto;
  padding-block: clamp(2.25rem, 4.5vw, 4.25rem) clamp(3.5rem, 6vw, 5.5rem);
  padding-inline: var(--gutter);
}

.hero-masthead {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 1.5rem 3.5rem;
  align-items: end;
  padding-block-end: clamp(2rem, 3.5vw, 3rem);
  border-block-end: 1px solid var(--line-dark);
}

.masthead-meta {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.masthead-coords {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--ink-subtle);
}

.hero-masthead h1 {
  font-size: clamp(2.4rem, 4.8vw, 4.5rem);
  line-height: 1.04;
  letter-spacing: -0.035em;
}

.hero-masthead h1 span {
  display: block;
}

.hero-masthead h1 em {
  font-style: italic;
  color: var(--gold-leaf);
}

.hero-lead {
  font-size: clamp(0.95rem, 1.1vw, 1.0625rem);
  line-height: 1.75;
  color: var(--ink-muted);
  max-inline-size: 54ch;
}

/* WORKBENCH 3-COLUMN LAYOUT */
.sanding-workbench {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr) 320px;
  gap: 1.5rem;
  margin-block-start: 2rem;
  align-items: stretch;
}

/* Left Rail: Strata Tabs */
.strata-rail {
  display: flex;
  flex-direction: column;
  background: var(--bg-plinth);
  border: 1px solid var(--line-dark);
  padding: 1.25rem;
}

.rail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding-block-end: 0.9rem;
  margin-block-end: 0.75rem;
  border-block-end: 1px solid var(--line-dark);
}

.strata-tabs {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
}

.stratum-tab {
  display: grid;
  grid-template-columns: 1.75rem 1fr 0.85rem;
  align-items: center;
  gap: 0.65rem;
  padding: 0.8rem 0.75rem;
  text-align: start;
  border: 1px solid transparent;
  background: rgba(255, 255, 255, 0.015);
  transition: border-color 0.2s, background-color 0.2s;
}

.stratum-tab:hover {
  border-color: var(--line-dark);
  background: var(--bg-elevated);
}

.stratum-tab.is-active {
  border-color: var(--gold-leaf);
  background: var(--bg-elevated);
}

.stratum-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--gold-leaf);
  font-variant-numeric: tabular-nums;
}

.stratum-info strong {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink-ivory);
}

.stratum-info small {
  display: block;
  font-size: 0.75rem;
  color: var(--ink-muted);
  margin-block-start: 0.15rem;
}

.stratum-swatch {
  inline-size: 0.75rem;
  block-size: 0.75rem;
  border-radius: 50%;
  background: var(--swatch);
  border: 1px solid rgba(255, 255, 255, 0.28);
}

/* Center Stage: Interactive Lacquer Canvas */
.canvas-stage-wrap {
  display: flex;
  flex-direction: column;
  background: var(--bg-plinth);
  border: 1px solid var(--line-dark);
  padding: 1rem 1.25rem;
  min-inline-size: 0;
}

.canvas-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-block-end: 0.85rem;
}

.canvas-instruction {
  font-size: 0.8125rem;
  color: var(--ink-muted);
}

.canvas-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.micro-button {
  min-block-size: 2.25rem;
  padding-inline: 0.75rem;
  border: 1px solid var(--line-dark);
  background: var(--bg-obsidian);
  font-size: 0.75rem;
  color: var(--ink-ivory);
  transition: border-color 0.2s, background-color 0.2s;
}

.micro-button:hover {
  border-color: var(--gold-leaf);
  background: var(--bg-elevated);
}

.lacquer-viewport {
  position: relative;
  flex: 1;
  min-block-size: 340px;
  aspect-ratio: 900 / 620;
  background: #0d0a08;
  border: 1px solid var(--line-dark);
  overflow: clip;
  cursor: crosshair;
  touch-action: none;
  user-select: none;
}

.lacquer-fallback,
#lacquer-canvas {
  position: absolute;
  inset: 0;
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
}

.viewport-hud {
  position: absolute;
  inset: 0.75rem;
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  color: rgba(242, 236, 225, 0.72);
}

.hud-corner {
  position: absolute;
  background: rgba(18, 15, 13, 0.72);
  padding: 0.2rem 0.45rem;
  border: 1px solid rgba(209, 163, 83, 0.25);
}

.hud-tl { inset-block-start: 0; inset-inline-start: 0; }
.hud-tr { inset-block-start: 0; inset-inline-end: 0; }
.hud-bl { inset-block-end: 0; inset-inline-start: 0; }
.hud-br { inset-block-end: 0; inset-inline-end: 0; }

.canvas-Bottombar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-block-start: 0.9rem;
}

.depth-meter {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.depth-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
}

.depth-bars {
  display: flex;
  gap: 0.25rem;
}

.depth-bars i {
  display: block;
  inline-size: 1.65rem;
  block-size: 0.45rem;
  background: var(--layer-color);
  opacity: 0.35;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: opacity 0.2s, transform 0.2s;
}

.depth-bars i.is-active {
  opacity: 1;
  transform: scaleY(1.45);
}

.light-control {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.75rem;
  color: var(--ink-muted);
}

.light-control input[type="range"] {
  inline-size: 7.5rem;
  accent-color: var(--gold-leaf);
}

/* Right Rail: Active Stratum Dossier */
.stratum-dossier {
  display: flex;
  flex-direction: column;
  background: var(--bg-plinth);
  border: 1px solid var(--line-dark);
  padding: 1.4rem;
}

.dossier-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding-block-end: 0.85rem;
  border-block-end: 1px solid var(--line-dark);
}

.dossier-badge {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--line-dark);
  color: var(--ink-ivory);
}

.stratum-dossier h2 {
  font-size: clamp(1.55rem, 2vw, 1.95rem);
  line-height: 1.15;
  margin-block: 1rem 0.75rem;
}

.dossier-description {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--ink-muted);
}

.dossier-specs {
  margin-block: 1.25rem auto;
  border-block-start: 1px solid var(--line-dark);
}

.dossier-specs > div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.65rem;
  border-block-end: 1px solid var(--line-faint);
  font-size: 0.8125rem;
}

.dossier-specs dt {
  color: var(--ink-subtle);
}

.dossier-specs dd {
  text-align: end;
  color: var(--ink-ivory);
}

.dossier-jump {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-block-size: 2.75rem;
  margin-block-start: 1.25rem;
  padding-inline: 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--line-dark);
  font-size: 0.8125rem;
  transition: border-color 0.2s, background-color 0.2s;
}

.dossier-jump:hover {
  border-color: var(--gold-leaf);
  background: var(--son-vermilion-deep);
}

/* SECTION 02: ASYMMETRIC MUSEUM ARCHIVE */
.archive-section {
  max-inline-size: 1560px;
  margin-inline: auto;
  padding-block: clamp(3.5rem, 6vw, 6rem);
  padding-inline: var(--gutter);
  border-block-start: 1px solid var(--line-dark);
}

.section-header {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1.5rem 3rem;
  align-items: end;
}

.section-header h2 {
  font-size: clamp(2rem, 3.8vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-block-start: 0.55rem;
}

.section-intro {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--ink-muted);
  max-inline-size: 56ch;
}

.archive-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-block-start: 2.25rem;
  padding-block: 0.5rem;
  border-block: 1px solid var(--line-dark);
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.filter-btn {
  position: relative;
  min-block-size: 2.75rem;
  font-size: 0.875rem;
  color: var(--ink-muted);
  transition: color 0.2s;
}

.filter-btn sup {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--gold-leaf);
}

.filter-btn.is-active,
.filter-btn:hover {
  color: var(--ink-ivory);
}

.filter-btn.is-active::after {
  content: '';
  position: absolute;
  inset-inline: 0;
  inset-block-end: -0.5rem;
  block-size: 2px;
  background: var(--son-vermilion);
}

.view-switch {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.8125rem;
  color: var(--ink-muted);
}

.view-btn {
  min-block-size: 2.75rem;
  color: var(--ink-muted);
}

.view-btn.is-active {
  color: var(--gold-leaf);
  text-decoration: underline;
  text-underline-offset: 5px;
}

/* Asymmetric 12-Column Museum Grid */
.artifact-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 4.5rem 2rem;
  padding-block-start: 3.5rem;
}

.artifact-card {
  min-inline-size: 0;
}

.artifact-card[data-id="table"] {
  grid-column: 1 / span 7;
}

.artifact-card[data-id="vessel"] {
  grid-column: 9 / span 4;
  padding-block-start: 3.5rem;
}

.artifact-card[data-id="screen"] {
  grid-column: 6 / span 7;
}

.artifact-card[data-id="tray"] {
  grid-column: 1 / span 4;
  grid-row: 2;
  padding-block-start: 2rem;
}

.artifact-grid.is-filtered:not(.is-list) .artifact-card {
  grid-column: span 6;
  grid-row: auto;
  padding-block-start: 0;
}

.artifact-trigger {
  display: block;
  inline-size: 100%;
  text-align: start;
}

.artifact-meta-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-block-end: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.catalog-code {
  color: var(--gold-leaf);
  letter-spacing: 0.06em;
}

.curing-tag {
  color: var(--ink-subtle);
}

.artifact-media {
  display: block;
  position: relative;
  overflow: clip;
  background: var(--bg-plinth);
  border: 1px solid var(--line-dark);
}

.artifact-media img {
  inline-size: 100%;
  block-size: auto;
  transition: transform 0.55s var(--ease-out);
}

.artifact-trigger:hover .artifact-media img {
  transform: scale(1.025);
}

.artifact-hover-pill {
  position: absolute;
  inset-block-end: 0.85rem;
  inset-inline-end: 0.85rem;
  padding: 0.45rem 0.8rem;
  background: rgba(18, 15, 13, 0.88);
  border: 1px solid var(--gold-leaf);
  font-size: 0.75rem;
  color: var(--ink-ivory);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.2s, transform 0.2s;
}

.artifact-trigger:hover .artifact-hover-pill,
.artifact-trigger:focus-visible .artifact-hover-pill {
  opacity: 1;
  transform: translateY(0);
}

.artifact-caption {
  display: block;
  margin-block-start: 1rem;
  padding-block-start: 0.85rem;
  border-block-start: 1px solid var(--line-dark);
}

.artifact-title-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.artifact-title-row strong {
  font-family: var(--font-serif);
  font-size: clamp(1.35rem, 1.8vw, 1.7rem);
  font-weight: 400;
  color: var(--ink-ivory);
}

.artifact-dims {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-subtle);
  font-variant-numeric: tabular-nums;
}

.artifact-summary {
  display: block;
  margin-block-start: 0.5rem;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--ink-muted);
  max-inline-size: 58ch;
}

.list-arrow {
  display: none;
}

/* Catalogue List View Mode */
.artifact-grid.is-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-block-start: 1rem;
}

.artifact-grid.is-list .artifact-card {
  grid-column: auto;
  grid-row: auto;
  padding-block-start: 0;
  border-block-end: 1px solid var(--line-dark);
}

.artifact-grid.is-list .artifact-trigger {
  display: grid;
  grid-template-columns: 210px 130px 1fr auto;
  align-items: center;
  gap: 2rem;
  padding-block: 1.35rem;
}

.artifact-grid.is-list .artifact-meta-top {
  flex-direction: column;
  align-items: flex-start;
  margin-block-end: 0;
}

.artifact-grid.is-list .artifact-media {
  inline-size: 130px;
  block-size: 92px;
}

.artifact-grid.is-list .artifact-media img {
  inline-size: 100%;
  block-size: 100%;
  object-fit: cover;
}

.artifact-grid.is-list .artifact-hover-pill {
  display: none;
}

.artifact-grid.is-list .artifact-caption {
  margin-block-start: 0;
  padding-block-start: 0;
  border-block-start: 0;
}

.artifact-grid.is-list .list-arrow {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 1.6rem;
  color: var(--gold-leaf);
}

/* SECTION 03: WARM GIẤY DÓ PAPER INTERLUDE */
.curing-notebook {
  background-color: var(--paper-do);
  color: var(--paper-ink);
  padding-block: clamp(3.75rem, 7vw, 6.25rem);
  padding-inline: var(--gutter);
  border-block: 1px solid var(--paper-line);
}

.notebook-inner {
  max-inline-size: 1360px;
  margin-inline: auto;
}

.notebook-header {
  max-inline-size: 760px;
}

.notebook-kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.09em;
  color: #7d281c;
}

.notebook-header h2 {
  font-size: clamp(2rem, 3.6vw, 3.2rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-block: 0.65rem 1rem;
}

.notebook-lead {
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--paper-muted);
}

.process-ledger {
  list-style: none;
  padding: 0;
  margin-block: 3rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem;
}

.process-ledger li {
  background: var(--paper-card);
  border: 1px solid var(--paper-line);
  padding: 1.75rem;
}

.ledger-days {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: #7d281c;
  padding-block-end: 0.5rem;
  border-block-end: 1px solid var(--paper-line);
}

.process-ledger h3 {
  font-size: 1.5rem;
  margin-block: 0.9rem 0.65rem;
}

.process-ledger p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--paper-muted);
}

.notebook-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding-block-start: 1.75rem;
  border-block-start: 1px solid var(--paper-line);
}

.provenance-note strong {
  display: block;
  font-size: 0.875rem;
  margin-block-end: 0.25rem;
}

.provenance-note p {
  font-size: 0.8125rem;
  color: var(--paper-muted);
}

.notebook-cta {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  min-block-size: 2.85rem;
  padding-inline: 1.25rem;
  background: var(--paper-ink);
  color: var(--paper-do);
  font-size: 0.85rem;
  font-weight: 500;
}

.notebook-cta:hover {
  background: #7d281c;
}

/* SECTION 04: CUSTOM SAMPLE PLAQUE COMPOSER */
.composer-section {
  max-inline-size: 1560px;
  margin-inline: auto;
  padding-block: clamp(3.75rem, 6.5vw, 6.25rem);
  padding-inline: var(--gutter);
}

.composer-workspace {
  display: grid;
  grid-template-columns: 1.08fr 1fr;
  gap: 2.5rem;
  margin-block-start: 2.5rem;
  align-items: start;
}

.plaque-stage {
  background: var(--bg-plinth);
  border: 1px solid var(--line-dark);
  padding: 1.5rem;
  position: sticky;
  inset-block-start: 5.5rem;
}

.plaque-frame {
  position: relative;
  aspect-ratio: 760 / 520;
  background: #0d0a08;
  border: 1px solid var(--line-dark);
  overflow: clip;
}

#plaque-canvas {
  inline-size: 100%;
  block-size: 100%;
}

.plaque-brass-tag {
  position: absolute;
  inset-block-end: 0.85rem;
  inset-inline: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.45rem 0.75rem;
  background: rgba(18, 15, 13, 0.84);
  border: 1px solid rgba(209, 163, 83, 0.4);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--gold-leaf);
}

.plaque-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-block-start: 1.25rem;
  padding-block-start: 1.15rem;
  border-block-start: 1px solid var(--line-dark);
}

.plaque-metrics span {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.05em;
  color: var(--ink-subtle);
}

.plaque-metrics strong {
  display: block;
  margin-block-start: 0.25rem;
  font-size: 0.95rem;
  color: var(--ink-ivory);
  font-variant-numeric: tabular-nums;
}

/* Composer Controls */
.composer-controls {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.control-group {
  border: 0;
  padding: 0;
  margin: 0;
  padding-block-end: 1.35rem;
  border-block-end: 1px solid var(--line-dark);
}

.control-group legend,
.slider-header label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.875rem;
  font-weight: 600;
  margin-block-end: 0.9rem;
}

.step-idx {
  display: inline-grid;
  place-items: center;
  inline-size: 1.5rem;
  block-size: 1.5rem;
  border: 1px solid var(--gold-leaf);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--gold-leaf);
}

.option-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.swatch-option,
.inlay-option,
.finish-option {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.2rem;
  padding: 0.85rem 1rem;
  background: var(--bg-plinth);
  border: 1px solid var(--line-dark);
  text-align: start;
  transition: border-color 0.2s, background-color 0.2s;
}

.swatch-option i {
  inline-size: 1.25rem;
  block-size: 1.25rem;
  border-radius: 50%;
  background: var(--c);
  border: 1px solid rgba(255, 255, 255, 0.35);
  margin-block-end: 0.25rem;
}

.swatch-option strong,
.inlay-option strong,
.finish-option strong {
  font-size: 0.875rem;
  font-weight: 600;
}

.swatch-option small,
.inlay-option small,
.finish-option small {
  font-size: 0.75rem;
  color: var(--ink-muted);
}

.swatch-option.is-selected,
.inlay-option.is-selected,
.finish-option.is-selected {
  border-color: var(--gold-leaf);
  background: var(--bg-elevated);
}

.finish-toggle-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.slider-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.slider-header label {
  margin-block-end: 0;
}

.slider-header output {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--gold-leaf);
  font-variant-numeric: tabular-nums;
}

#reveal-slider {
  inline-size: 100%;
  margin-block-start: 0.75rem;
  accent-color: var(--son-vermilion);
}

.composer-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-block-size: 3rem;
  padding-inline: 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background-color 0.2s, border-color 0.2s;
}

.primary-btn {
  background: var(--son-vermilion);
  color: var(--ink-ivory);
  border: 1px solid var(--son-vermilion);
  flex: 1 1 210px;
}

.primary-btn:hover {
  background: var(--son-vermilion-deep);
}

.secondary-btn {
  background: var(--bg-plinth);
  color: var(--ink-ivory);
  border: 1px solid var(--line-dark);
  flex: 1 1 180px;
}

.secondary-btn:hover {
  border-color: var(--gold-leaf);
  background: var(--bg-elevated);
}

.full-width {
  inline-size: 100%;
}

.composer-feedback {
  font-size: 0.8125rem;
  color: var(--gold-leaf);
  min-block-size: 1.25rem;
}

/* FOOTER */
.site-footer {
  max-inline-size: 1560px;
  margin-inline: auto;
  padding-block: 3rem 4rem;
  padding-inline: var(--gutter);
  border-block-start: 1px solid var(--line-dark);
}

.footer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 2rem;
  padding-block-end: 2rem;
  border-block-end: 1px solid var(--line-faint);
}

.footer-wordmark {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  line-height: 1;
}

.footer-tagline {
  margin-block-start: 0.5rem;
  font-size: 0.875rem;
  color: var(--ink-muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.85rem;
  color: var(--ink-muted);
}

.footer-links a:hover {
  color: var(--ink-ivory);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.footer-bottom {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-block-start: 1.5rem;
  font-size: 0.8125rem;
  color: var(--ink-subtle);
}

.footer-bottom p {
  max-inline-size: 72ch;
}

.footer-bottom a {
  color: var(--gold-leaf);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* DIALOGS */
.studio-dialog {
  inline-size: min(980px, calc(100% - 2rem));
  max-block-size: calc(100dvh - 2.5rem);
  padding: 0;
  border: 1px solid var(--line-dark);
  background: var(--bg-obsidian);
  color: var(--ink-ivory);
  overscroll-behavior: contain;
}

.shortlist-dialog {
  inline-size: min(640px, calc(100% - 2rem));
}

.studio-dialog::backdrop {
  background: rgba(8, 6, 5, 0.82);
  backdrop-filter: blur(4px);
}

.dialog-topbar {
  position: sticky;
  inset-block-start: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.5rem;
  background: var(--bg-plinth);
  border-block-end: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.07em;
  color: var(--gold-leaf);
}

.dialog-close {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-block-size: 2.5rem;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  color: var(--ink-ivory);
}

.dialog-artifact-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
}

.dialog-artifact-media {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.75rem;
  background: #0d0a08;
}

.dialog-artifact-media img {
  max-block-size: 520px;
  object-fit: contain;
}

.dialog-artifact-body {
  padding: 2rem;
}

.dialog-artifact-body h2 {
  font-size: 2rem;
  margin-block: 0.5rem 1rem;
}

.dialog-artifact-desc {
  font-size: 0.925rem;
  line-height: 1.7;
  color: var(--ink-muted);
}

.dialog-spec-list {
  margin-block: 1.5rem;
  border-block-start: 1px solid var(--line-dark);
}

.dialog-spec-list > div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.65rem;
  border-block-end: 1px solid var(--line-faint);
  font-size: 0.8125rem;
}

.dialog-spec-list dt {
  color: var(--ink-subtle);
}

.dialog-spec-list dd {
  text-align: end;
}

.dialog-status {
  margin-block-start: 0.75rem;
  font-size: 0.8125rem;
  color: var(--gold-leaf);
  min-block-size: 1.25rem;
}

/* Shortlist Dialog Content */
.shortlist-body {
  padding: 2rem;
}

.shortlist-body h2 {
  font-size: 2rem;
}

.shortlist-sub {
  margin-block-start: 0.35rem;
  font-size: 0.9rem;
  color: var(--ink-muted);
}

.shortlist-items {
  margin-block: 1.5rem;
  border-block-start: 1px solid var(--line-dark);
}

.shortlist-empty {
  padding-block: 1.75rem;
  color: var(--ink-muted);
  font-size: 0.9rem;
  border-block-end: 1px solid var(--line-dark);
}

.shortlist-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.9rem;
  border-block-end: 1px solid var(--line-faint);
}

.shortlist-row strong {
  display: block;
  font-size: 0.95rem;
}

.shortlist-row span {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-muted);
  margin-block-start: 0.2rem;
}

.remove-shortlist-item {
  font-size: 0.75rem;
  color: var(--ink-muted);
  text-decoration: underline;
  text-underline-offset: 3px;
  min-block-size: 2.25rem;
}

.shortlist-inquiry label {
  display: block;
  font-size: 0.8125rem;
  margin-block-end: 0.5rem;
  color: var(--ink-muted);
}

.shortlist-inquiry textarea {
  inline-size: 100%;
  padding: 0.85rem;
  background: var(--bg-plinth);
  border: 1px solid var(--line-dark);
  color: var(--ink-ivory);
  font-size: 0.85rem;
  line-height: 1.6;
  resize: vertical;
}

.shortlist-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-block-start: 0.85rem;
}

.text-btn {
  font-size: 0.8125rem;
  color: var(--ink-muted);
  text-decoration: underline;
  text-underline-offset: 4px;
  min-block-size: 2.5rem;
}

.copy-feedback {
  margin-block-start: 0.5rem;
  font-size: 0.8125rem;
  color: var(--gold-leaf);
  min-block-size: 1.25rem;
}

.demo-disclaimer {
  margin-block-start: 1.25rem;
  font-size: 0.75rem;
  color: var(--ink-subtle);
}

/* RESPONSIVE BREAKPOINTS */
@media (max-width: 1120px) {
  .sanding-workbench {
    grid-template-columns: 1fr 1fr;
  }
  .canvas-stage-wrap {
    grid-column: 1 / -1;
    order: -1;
  }
  .composer-workspace {
    grid-template-columns: 1fr;
  }
  .plaque-stage {
    position: static;
  }
}

@media (max-width: 820px) {
  .proposal-context {
    display: none;
  }
  .site-header {
    grid-template-columns: 1fr auto;
    gap: 0.75rem 1rem;
  }
  .site-nav {
    grid-column: 1 / -1;
    justify-content: flex-start;
    gap: 1.25rem;
  }
  .hero-masthead,
  .section-header,
  .sanding-workbench,
  .process-ledger,
  .dialog-artifact-grid {
    grid-template-columns: 1fr;
  }
  .artifact-card[data-id="table"],
  .artifact-card[data-id="vessel"],
  .artifact-card[data-id="screen"],
  .artifact-card[data-id="tray"],
  .artifact-grid.is-filtered:not(.is-list) .artifact-card {
    grid-column: 1 / -1;
    grid-row: auto;
    padding-block-start: 0;
  }
  .artifact-grid.is-list .artifact-trigger {
    grid-template-columns: 96px 1fr auto;
    gap: 1rem;
  }
  .artifact-grid.is-list .artifact-meta-top {
    grid-column: 1 / -1;
  }
}

@media (max-width: 480px) {
  .wordmark-sub {
    display: none;
  }
  .option-grid,
  .finish-toggle-row,
  .plaque-metrics {
    grid-template-columns: 1fr;
  }
  .lacquer-viewport {
    min-block-size: 250px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}