:root,
[data-theme='light'] {
  --font-display: 'Zodiak', Georgia, serif;
  --font-body: 'Satoshi', Inter, sans-serif;
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --color-bg: #efe8db;
  --color-surface: #f8f2e8;
  --color-surface-2: #fffaf1;
  --color-surface-offset: #e5d8c7;
  --color-surface-dynamic: #d4c1aa;
  --color-divider: #cab8a3;
  --color-border: #bca891;
  --color-text: #241c15;
  --color-text-muted: #6f6256;
  --color-text-faint: #9b8d7d;
  --color-primary: #7a351e;
  --color-primary-hover: #5d2716;
  --color-primary-highlight: #ead1bf;
  --color-blue: #24485b;
  --color-gold: #b6792d;
  --color-success: #526d3a;
  --shadow-sm: 0 1px 2px oklch(0.25 0.03 60 / 0.08);
  --shadow-md: 0 10px 24px oklch(0.25 0.03 60 / 0.1);
  --shadow-lg: 0 26px 70px oklch(0.22 0.03 60 / 0.18);
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme='dark'] {
  --color-bg: #16130f;
  --color-surface: #1f1a15;
  --color-surface-2: #292219;
  --color-surface-offset: #33291f;
  --color-surface-dynamic: #463728;
  --color-divider: #4c3d31;
  --color-border: #685442;
  --color-text: #eee2d1;
  --color-text-muted: #bdad9b;
  --color-text-faint: #897968;
  --color-primary: #e09965;
  --color-primary-hover: #f0b487;
  --color-primary-highlight: #513426;
  --color-blue: #8fb7c9;
  --color-gold: #d8a24a;
  --color-success: #99b56b;
  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.24);
  --shadow-md: 0 10px 24px oklch(0 0 0 / 0.32);
  --shadow-lg: 0 26px 70px oklch(0 0 0 / 0.45);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
  background: var(--color-bg);
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background:
    radial-gradient(circle at 18% 0%, color-mix(in oklab, var(--color-primary) 16%, transparent), transparent 32rem),
    radial-gradient(circle at 90% 12%, color-mix(in oklab, var(--color-blue) 16%, transparent), transparent 28rem),
    linear-gradient(180deg, var(--color-bg), color-mix(in oklab, var(--color-bg) 88%, var(--color-surface-offset)));
}

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

button {
  cursor: pointer;
  border: 0;
}

svg,
canvas {
  display: block;
  max-width: 100%;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

p {
  max-width: 70ch;
  text-wrap: pretty;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.skip-link {
  position: fixed;
  inset-block-start: var(--space-4);
  inset-inline-start: var(--space-4);
  z-index: 20;
  padding: var(--space-2) var(--space-4);
  transform: translateY(-150%);
  border-radius: var(--radius-full);
  background: var(--color-text);
  color: var(--color-bg);
  text-decoration: none;
  transition: transform var(--transition-interactive);
}

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

.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: var(--space-6);
  width: min(1180px, calc(100% - var(--space-8)));
  margin: var(--space-4) auto 0;
  padding: var(--space-3) var(--space-4);
  border: 1px solid color-mix(in oklab, var(--color-border) 70%, transparent);
  border-radius: var(--radius-full);
  background: color-mix(in oklab, var(--color-surface) 84%, transparent);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  width: 36px;
  height: 36px;
  color: var(--color-primary);
}

.brand-mark path,
.brand-mark circle {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.2;
}

.header-nav {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
}

.nav-link,
.theme-toggle,
.ghost-button,
.filter-pill,
.primary-action,
.secondary-action {
  min-height: 44px;
  border-radius: var(--radius-full);
  transition:
    background var(--transition-interactive),
    color var(--transition-interactive),
    border-color var(--transition-interactive),
    transform var(--transition-interactive),
    box-shadow var(--transition-interactive);
}

.nav-link {
  padding: 0 var(--space-4);
  background: transparent;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 700;
}

.nav-link:hover,
.nav-link:focus-visible {
  background: var(--color-primary-highlight);
  color: var(--color-text);
}

.theme-toggle {
  display: grid;
  width: 44px;
  place-items: center;
  background: var(--color-text);
  color: var(--color-bg);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.hero,
.intro-grid,
.gallery-section,
.lab-section,
.history-section,
.site-footer {
  width: min(1180px, calc(100% - var(--space-8)));
  margin-inline: auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.78fr);
  gap: clamp(var(--space-8), 5vw, var(--space-20));
  align-items: center;
  padding-block: clamp(var(--space-16), 10vw, var(--space-24)) var(--space-16);
}

.hero-copy {
  display: grid;
  gap: var(--space-6);
}

.eyebrow,
.mini-label {
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 900;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 11ch;
  font-size: var(--text-3xl);
}

.hero-lede {
  max-width: 58ch;
  color: var(--color-text-muted);
  font-size: var(--text-lg);
}

.hero-actions,
.filter-bar,
.control-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-items: center;
}

.primary-action,
.secondary-action {
  padding: 0 var(--space-6);
  font-size: var(--text-sm);
  font-weight: 900;
}

.primary-action {
  background: var(--color-text);
  color: var(--color-bg);
  box-shadow: var(--shadow-md);
}

.secondary-action {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
}

.primary-action:hover,
.secondary-action:hover {
  transform: translateY(-1px);
}

.hero-panel {
  display: grid;
  gap: var(--space-4);
}

.specimen-card,
.case-detail,
.upload-card,
.lab-preview,
.intro-grid article,
.timeline li {
  border: 1px solid color-mix(in oklab, var(--color-border) 68%, transparent);
  background: color-mix(in oklab, var(--color-surface) 88%, transparent);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(16px);
}

.specimen-card {
  padding: var(--space-4);
  border-radius: var(--radius-xl);
}

.specimen-card p {
  margin-block-start: var(--space-4);
  color: var(--color-text-muted);
}

.specimen-visual {
  overflow: hidden;
  border-radius: calc(var(--radius-xl) - var(--space-2));
  background: var(--color-surface-offset);
}

.hero-specimen svg rect {
  fill: color-mix(in oklab, var(--color-blue) 22%, var(--color-surface));
}

.hero-specimen svg ellipse {
  fill: color-mix(in oklab, var(--color-surface-2) 88%, white);
  opacity: 0.86;
}

.face-dot {
  fill: color-mix(in oklab, var(--color-blue) 85%, var(--color-text));
  opacity: 0.72;
}

.face-line {
  fill: none;
  stroke: color-mix(in oklab, var(--color-blue) 85%, var(--color-text));
  stroke-linecap: round;
  stroke-width: 7;
  opacity: 0.68;
}

.stat-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.stat-strip div {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: color-mix(in oklab, var(--color-text) 92%, var(--color-primary));
  color: var(--color-bg);
}

.stat-strip strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  line-height: 1;
}

.stat-strip span {
  display: block;
  margin-block-start: var(--space-2);
  color: color-mix(in oklab, var(--color-bg) 76%, transparent);
  font-size: var(--text-xs);
  line-height: 1.35;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr 1fr;
  gap: var(--space-4);
  padding-block-end: var(--space-20);
}

.intro-grid article {
  display: grid;
  gap: var(--space-3);
  min-height: 260px;
  padding: var(--space-6);
  border-radius: var(--radius-xl);
}

.intro-grid h2 {
  font-size: var(--text-xl);
}

.intro-grid p,
.section-heading p,
.case-copy p,
.timeline p,
.lab-copy p {
  color: var(--color-text-muted);
}

.gallery-section {
  padding-block: var(--space-12) var(--space-20);
}

.section-heading {
  display: grid;
  gap: var(--space-3);
  max-width: 720px;
  margin-block-end: var(--space-8);
}

.section-heading h2,
.lab-copy h2,
.history-section h2 {
  font-size: var(--text-2xl);
}

.section-heading.compact {
  margin-block-end: var(--space-6);
}

.filter-bar {
  margin-block-end: var(--space-6);
}

.filter-pill {
  padding: 0 var(--space-5);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 800;
}

.filter-pill.is-selected,
.filter-pill:hover {
  border-color: color-mix(in oklab, var(--color-primary) 50%, var(--color-border));
  background: var(--color-primary-highlight);
  color: var(--color-text);
}

.gallery-layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.32fr) minmax(0, 1fr);
  gap: var(--space-5);
  align-items: start;
}

.case-list {
  display: grid;
  gap: var(--space-3);
}

.case-card {
  display: grid;
  gap: var(--space-1);
  width: 100%;
  padding: var(--space-4);
  border: 1px solid color-mix(in oklab, var(--color-border) 72%, transparent);
  border-radius: var(--radius-lg);
  background: color-mix(in oklab, var(--color-surface) 78%, transparent);
  color: var(--color-text);
  text-align: left;
  transition:
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    transform var(--transition-interactive),
    opacity var(--transition-interactive);
}

.case-card[hidden] {
  display: none;
}

.case-card span {
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.case-card strong {
  font-size: var(--text-base);
}

.case-card:hover,
.case-card.is-selected {
  border-color: color-mix(in oklab, var(--color-primary) 48%, var(--color-border));
  background: var(--color-surface-2);
  transform: translateY(-1px);
}

.case-detail {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 0.85fr);
  gap: var(--space-6);
  padding: var(--space-5);
  border-radius: var(--radius-xl);
}

.case-visual-wrap {
  position: relative;
}

.case-visual {
  overflow: hidden;
  min-height: 480px;
  border-radius: calc(var(--radius-xl) - var(--space-2));
  background: var(--color-surface-offset);
}

.case-visual svg {
  width: 100%;
  height: 100%;
  min-height: 480px;
  object-fit: cover;
}

.guide {
  opacity: 1;
  transition: opacity var(--transition-interactive);
}

.guides-hidden .guide {
  opacity: 0;
}

.ghost-button {
  position: absolute;
  inset-block-end: var(--space-4);
  inset-inline-start: var(--space-4);
  min-height: 40px;
  padding: 0 var(--space-4);
  border: 1px solid color-mix(in oklab, var(--color-border) 70%, transparent);
  background: color-mix(in oklab, var(--color-surface) 80%, transparent);
  color: var(--color-text);
  font-size: var(--text-xs);
  font-weight: 900;
  backdrop-filter: blur(12px);
}

.case-copy {
  align-self: center;
  display: grid;
  gap: var(--space-5);
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.case-meta span {
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 900;
}

.case-copy h3 {
  font-size: var(--text-xl);
}

.fact-list {
  display: grid;
  gap: var(--space-4);
}

.fact-list div {
  display: grid;
  gap: var(--space-1);
}

.fact-list dt {
  color: var(--color-text);
  font-size: var(--text-xs);
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.fact-list dd {
  color: var(--color-text-muted);
}

.source-link {
  justify-self: start;
  color: var(--color-primary);
  font-weight: 900;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.22em;
}

.lab-section {
  display: grid;
  grid-template-columns: minmax(300px, 0.78fr) minmax(0, 1.1fr);
  gap: var(--space-6);
  align-items: stretch;
  padding-block: var(--space-16) var(--space-20);
}

.lab-copy {
  display: grid;
  align-content: start;
  gap: var(--space-5);
}

.upload-card {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-4);
  border-radius: var(--radius-xl);
}

.drop-zone {
  display: grid;
  min-height: 188px;
  place-items: center;
  padding: var(--space-6);
  border: 1.5px dashed color-mix(in oklab, var(--color-primary) 44%, var(--color-border));
  border-radius: var(--radius-lg);
  background: color-mix(in oklab, var(--color-primary-highlight) 42%, transparent);
  color: var(--color-text-muted);
  text-align: center;
  cursor: pointer;
  transition:
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    transform var(--transition-interactive);
}

.drop-zone.is-dragging,
.drop-zone:hover {
  background: var(--color-primary-highlight);
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

.drop-zone input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

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

.drop-icon {
  width: 52px;
  height: 52px;
  margin-block-end: var(--space-2);
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  position: relative;
}

.drop-icon::before,
.drop-icon::after {
  content: '';
  position: absolute;
  background: var(--color-primary);
}

.drop-icon::before {
  width: 18px;
  height: 2px;
  inset: 24px auto auto 15px;
}

.drop-icon::after {
  width: 2px;
  height: 18px;
  inset: 15px auto auto 23px;
}

.control-row label {
  display: grid;
  gap: var(--space-2);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 800;
}

.control-row input[type='range'] {
  accent-color: var(--color-primary);
}

.checkbox-label {
  display: inline-flex !important;
  grid-template-columns: auto 1fr;
  align-items: center;
  min-height: 44px;
  gap: var(--space-2) !important;
}

.checkbox-label input {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
}

.lab-preview {
  position: relative;
  overflow: hidden;
  min-height: 520px;
  border-radius: var(--radius-xl);
}

#preview-canvas {
  width: 100%;
  height: 100%;
  min-height: 520px;
  object-fit: contain;
  background: var(--color-surface-offset);
}

.preview-empty {
  position: absolute;
  inset: var(--space-6);
  display: grid;
  place-content: center;
  gap: var(--space-2);
  border: 1px solid color-mix(in oklab, var(--color-border) 60%, transparent);
  border-radius: var(--radius-lg);
  color: var(--color-text-muted);
  text-align: center;
  pointer-events: none;
}

.preview-empty strong {
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 500;
}

.preview-empty.is-hidden {
  display: none;
}

.history-section {
  padding-block: var(--space-8) var(--space-20);
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  list-style: none;
}

.timeline li {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-5);
  border-radius: var(--radius-xl);
}

.timeline time {
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.timeline h3 {
  font-size: var(--text-lg);
}

.site-footer {
  padding-block: var(--space-8);
  border-block-start: 1px solid var(--color-divider);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.cloud-bg {
  fill: #9ab9c8;
}

.cloud-fill {
  fill: #f5efe4;
  opacity: 0.88;
}

.wall-bg {
  fill: #c9ab88;
}

.wall-stain {
  fill: #6d4b36;
  opacity: 0.32;
}

.outlet-bg {
  fill: #d9d1c4;
}

.outlet-plate {
  fill: #f7f0e6;
  stroke: #a99784;
  stroke-width: 3;
}

.mars-bg {
  fill: #9a4e2c;
}

.mars-mesa {
  fill: #c77a4c;
}

.moon-bg {
  fill: #202026;
}

.moon-disc {
  fill: #d8d2c7;
}

.moon-maria {
  fill: #777168;
  opacity: 0.8;
}

.guide-eye {
  fill: color-mix(in oklab, var(--color-text) 82%, var(--color-primary));
}

.guide-line {
  fill: none;
  stroke: color-mix(in oklab, var(--color-text) 82%, var(--color-primary));
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 6;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media (max-width: 980px) {
  .site-header {
    grid-template-columns: 1fr auto;
    border-radius: var(--radius-xl);
  }

  .header-nav {
    grid-column: 1 / -1;
    order: 3;
    justify-content: flex-start;
    overflow-x: auto;
  }

  .hero,
  .gallery-layout,
  .case-detail,
  .lab-section {
    grid-template-columns: 1fr;
  }

  .intro-grid,
  .timeline {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero h1 {
    max-width: 13ch;
  }
}

@media (max-width: 640px) {
  .site-header,
  .hero,
  .intro-grid,
  .gallery-section,
  .lab-section,
  .history-section,
  .site-footer {
    width: min(100% - var(--space-4), 1180px);
  }

  .brand span {
    max-width: 220px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .hero {
    padding-block-start: var(--space-10);
  }

  .intro-grid,
  .timeline,
  .stat-strip {
    grid-template-columns: 1fr;
  }

  .intro-grid article {
    min-height: auto;
  }

  .case-list {
    grid-template-columns: 1fr 1fr;
  }

  .case-card {
    padding: var(--space-3);
  }

  .case-visual,
  .case-visual svg {
    min-height: 340px;
  }

  .lab-preview,
  #preview-canvas {
    min-height: 360px;
  }
}

/* ── Face detection button & result ─────────────────────────────────────── */
.detect-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
  padding: 0.65rem 1.25rem;
  background: var(--color-ink);
  color: var(--color-surface);
  border: none;
  border-radius: 999px;
  font: 600 0.95rem/1 var(--font-sans);
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s;
}
.detect-btn:hover:not(:disabled) { opacity: 0.85; transform: translateY(-1px); }
.detect-btn:disabled { opacity: 0.45; cursor: not-allowed; }

.detect-result {
  margin-top: var(--space-3);
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius-md);
  font: 500 0.92rem/1.5 var(--font-sans);
  border-left: 3px solid;
}
.detect-result[data-state="found"]    { background: color-mix(in srgb, #f97316 12%, var(--color-surface)); border-color: #f97316; color: var(--color-text); }
.detect-result[data-state="notfound"]{ background: color-mix(in srgb, var(--color-ink) 7%, var(--color-surface)); border-color: var(--color-ink); color: var(--color-text); }
.detect-result[data-state="error"]   { background: color-mix(in srgb, #ef4444 10%, var(--color-surface)); border-color: #ef4444; color: var(--color-text); }