/* ============================================================
   SOUALIGA: SALT HISTORY OF SAINT MARTIN
   Art direction: warm editorial, colonial-era parchment tones,
   teal salt-water accent, gold/amber for Dutch heritage.
   Fonts: Playfair Display (display/headings) + Source Sans 3 (body)
   ============================================================ */

/* --- DESIGN TOKENS --- */
:root, [data-theme="light"] {
  /* Parchment warm surfaces — derived from salt/sand/colony aesthetic */
  --color-bg:             #f5f0e8;
  --color-surface:        #f8f4ec;
  --color-surface-2:      #faf7f2;
  --color-surface-offset: #ede5d5;
  --color-surface-offset-2: #e4dac8;
  --color-surface-dynamic: #d8cfc0;
  --color-divider:        #cec4b0;
  --color-border:         #c0b79f;

  /* Text — warm dark ink tones */
  --color-text:           #26200f;
  --color-text-muted:     #6b5f45;
  --color-text-faint:     #a89a80;
  --color-text-inverse:   #f5f0e8;

  /* Primary — Caribbean salt-water teal */
  --color-primary:        #147a7f;
  --color-primary-hover:  #0c5c60;
  --color-primary-active: #08393b;
  --color-primary-highlight: #c8dedb;

  /* Gold — Dutch amber / salt crystal */
  --color-gold:           #b88a18;
  --color-gold-hover:     #9a7013;
  --color-gold-active:    #7a570e;
  --color-gold-highlight: #e8d99a;

  /* Blue — sea */
  --color-blue:           #2e6e9c;
  --color-blue-hover:     #245a80;
  --color-blue-active:    #1a4260;
  --color-blue-highlight: #b8d5e8;

  /* Success / green — island vegetation */
  --color-success:        #3d7a2a;
  --color-success-hover:  #2d5e1e;
  --color-success-active: #1f4015;

  /* Warning / orange — colonial-era document */
  --color-warning:        #9a4a18;
  --color-warning-hover:  #7a3810;
  --color-warning-active: #5a2a0c;

  /* Utility */
  --color-text-muted:     #6b5f45;
  --color-text-faint:     #a89a80;

  /* Radii */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows (warm-toned) */
  --shadow-sm: 0 1px 3px oklch(0.2 0.04 60 / 0.08);
  --shadow-md: 0 4px 16px oklch(0.2 0.04 60 / 0.12);
  --shadow-lg: 0 12px 40px oklch(0.2 0.04 60 / 0.18);

  /* Spacing */
  --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;
  --space-32: 8rem;

  /* Type */
  --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);
  --text-hero: clamp(3.5rem,   1rem    + 7vw,    8rem);

  /* Fonts */
  --font-display: 'Zodiak', 'Playfair Display', Georgia, serif;
  --font-body: 'Source Sans 3', 'Helvetica Neue', sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

/* DARK MODE */
[data-theme="dark"] {
  --color-bg:             #141008;
  --color-surface:        #1a140b;
  --color-surface-2:      #1e1912;
  --color-surface-offset: #201a10;
  --color-surface-offset-2: #261f14;
  --color-surface-dynamic: #322a1c;
  --color-divider:        #2e2618;
  --color-border:         #3d3224;
  --color-text:           #e8dfcc;
  --color-text-muted:     #9a8e78;
  --color-text-faint:     #6a5e4a;
  --color-text-inverse:   #141008;
  --color-primary:        #4fa8ae;
  --color-primary-hover:  #2e8a90;
  --color-primary-active: #1a6a70;
  --color-primary-highlight: #1e3535;
  --color-gold:           #d4a830;
  --color-gold-hover:     #c09020;
  --color-gold-active:    #a07018;
  --color-gold-highlight: #3a3018;
  --color-blue:           #5a9cc8;
  --color-blue-hover:     #4080ae;
  --color-blue-active:    #2e6090;
  --color-blue-highlight: #1a2e40;
  --color-success:        #5daa3c;
  --color-success-hover:  #488828;
  --color-success-active: #336818;
  --color-warning:        #c87a3c;
  --color-warning-hover:  #b06028;
  --color-warning-active: #904818;
  --shadow-sm: 0 1px 3px oklch(0 0 0 / 0.25);
  --shadow-md: 0 4px 16px oklch(0 0 0 / 0.35);
  --shadow-lg: 0 12px 40px oklch(0 0 0 / 0.45);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #141008;
    --color-surface:        #1a140b;
    --color-surface-2:      #1e1912;
    --color-surface-offset: #201a10;
    --color-surface-offset-2: #261f14;
    --color-surface-dynamic: #322a1c;
    --color-divider:        #2e2618;
    --color-border:         #3d3224;
    --color-text:           #e8dfcc;
    --color-text-muted:     #9a8e78;
    --color-text-faint:     #6a5e4a;
    --color-text-inverse:   #141008;
    --color-primary:        #4fa8ae;
    --color-primary-hover:  #2e8a90;
    --color-primary-active: #1a6a70;
    --color-gold:           #d4a830;
    --color-blue:           #5a9cc8;
    --color-success:        #5daa3c;
    --color-warning:        #c87a3c;
    --shadow-sm: 0 1px 3px oklch(0 0 0 / 0.25);
    --shadow-md: 0 4px 16px oklch(0 0 0 / 0.35);
    --shadow-lg: 0 12px 40px oklch(0 0 0 / 0.45);
  }
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-20);
}

body {
  min-height: 100dvh;
  line-height: 1.65;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

img, picture, video, canvas, svg { display: block; max-width: 100%; }
ul[role="list"], ol[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.2; font-family: var(--font-display); }
p, li, figcaption { text-wrap: pretty; }

::selection {
  background: color-mix(in oklab, var(--color-primary), transparent 75%);
  color: var(--color-text);
}

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

button { cursor: pointer; background: none; border: none; }
a { color: inherit; text-decoration-color: var(--color-primary); }
a:hover { color: var(--color-primary); }

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

/* --- HEADER / NAV --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in oklab, var(--color-bg), transparent 10%);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow var(--transition-interactive);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-3) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  letter-spacing: -0.01em;
  transition: color var(--transition-interactive);
}
.logo:hover { color: var(--color-primary); }
.logo svg { flex-shrink: 0; }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.nav-links a {
  font-size: var(--text-sm);
  font-family: var(--font-body);
  text-decoration: none;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  transition: color var(--transition-interactive);
}
.nav-links a:hover { color: var(--color-text); }

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  background: transparent;
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* --- HERO --- */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: var(--space-20) var(--space-6);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-salt-pattern {
  width: 100%;
  height: 100%;
  color: var(--color-primary);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
  text-align: center;
}

.hero-eyebrow {
  font-size: var(--text-sm);
  font-family: var(--font-body);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  opacity: 0;
  animation: fadeUp 0.8s var(--ease-out) 0.2s forwards;
}

.hero-title {
  font-size: var(--text-hero);
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-text);
  line-height: 1;
  margin-bottom: var(--space-2);
  opacity: 0;
  animation: fadeUp 0.8s var(--ease-out) 0.35s forwards;
}

.hero-subtitle {
  font-size: var(--text-xl);
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  opacity: 0;
  animation: fadeUp 0.8s var(--ease-out) 0.5s forwards;
}

.hero-body {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 60ch;
  margin: 0 auto var(--space-10);
  line-height: 1.7;
  opacity: 0;
  animation: fadeUp 0.8s var(--ease-out) 0.65s forwards;
}

.hero-cta-row {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.8s var(--ease-out) 0.8s forwards;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: var(--space-3) var(--space-8);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  text-decoration: none;
  font-size: var(--text-sm);
  font-family: var(--font-body);
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: var(--radius-full);
  transition: background var(--transition-interactive), transform var(--transition-interactive), box-shadow var(--transition-interactive);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  color: var(--color-text-inverse);
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: var(--space-3) var(--space-8);
  background: transparent;
  color: var(--color-text);
  text-decoration: none;
  font-size: var(--text-sm);
  font-family: var(--font-body);
  font-weight: 500;
  letter-spacing: 0.04em;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--color-border);
  transition: border-color var(--transition-interactive), background var(--transition-interactive), transform var(--transition-interactive);
}
.btn-secondary:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-highlight);
  color: var(--color-text);
  transform: translateY(-1px);
}

.hero-scroll-hint {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-faint);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0;
  animation: fadeUp 0.8s var(--ease-out) 1.2s forwards;
}

.scroll-dot {
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { cy: 7; opacity: 1; }
  50% { cy: 14; opacity: 0.3; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* --- CONTEXT SECTION --- */
.context-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
  padding: clamp(var(--space-12), 6vw, var(--space-20)) var(--space-6);
}

.context-inner {
  max-width: var(--content-default);
  margin: 0 auto;
}

.context-stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}

.stat-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-6) var(--space-4);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  gap: var(--space-2);
}

.stat-card.stat-highlight {
  background: color-mix(in oklab, var(--color-primary), var(--color-surface-2) 85%);
  border-color: color-mix(in oklab, var(--color-primary), transparent 50%);
}

.stat-number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}

.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: center;
  line-height: 1.4;
}

.pullquote {
  border-left: 3px solid var(--color-primary);
  padding: var(--space-4) var(--space-8);
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: italic;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.pullquote cite {
  display: block;
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  font-style: normal;
  font-family: var(--font-body);
  color: var(--color-text-faint);
}

/* --- SECTION HEADERS --- */
.section-header {
  max-width: var(--content-default);
  margin: 0 auto var(--space-16);
  text-align: center;
  padding: 0 var(--space-6);
}

.section-eyebrow {
  font-size: var(--text-xs);
  font-family: var(--font-body);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.section-header h2 {
  font-size: var(--text-2xl);
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.section-intro {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
  margin: 0 auto;
  line-height: 1.7;
}

/* --- TIMELINE SECTION --- */
.timeline-section {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-6);
  background: var(--color-bg);
}

.timeline {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
}

/* Central line */
.timeline::before {
  content: '';
  position: absolute;
  left: 28px;
  top: 0;
  bottom: 0;
  width: 1.5px;
  background: linear-gradient(to bottom, transparent, var(--color-border), var(--color-border), transparent);
}

.timeline-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-12);
  position: relative;
}

.timeline-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  z-index: 1;
}

.marker-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-surface-offset);
  border: 2.5px solid var(--color-primary);
  flex-shrink: 0;
  margin-top: var(--space-5);
  transition: transform var(--transition-interactive), background var(--transition-interactive);
}

.timeline-item:hover .marker-dot {
  transform: scale(1.25);
  background: var(--color-primary);
}

/* Era-specific dot colors */
.marker-french  { border-color: var(--color-blue); }
.marker-dutch   { border-color: var(--color-gold); }
.marker-spanish { border-color: var(--color-warning); }
.marker-treaty  { border-color: var(--color-primary); background: var(--color-primary); width: 20px; height: 20px; margin-top: calc(var(--space-5) - 2px); }
.marker-philips { border-color: var(--color-gold); background: var(--color-gold); }
.marker-labor   { border-color: var(--color-text-muted); }
.marker-peak    { border-color: var(--color-primary); background: var(--color-primary); width: 20px; height: 20px; margin-top: calc(var(--space-5) - 2px); }
.marker-decline { border-color: var(--color-text-faint); }

.timeline-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}

.timeline-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.featured-card {
  border-color: color-mix(in oklab, var(--color-primary), var(--color-border) 50%);
  background: color-mix(in oklab, var(--color-primary), var(--color-surface) 94%);
}

.card-era-badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-family: var(--font-body);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-highlight);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
}

.era-french  .card-era-badge { color: var(--color-blue); background: var(--color-blue-highlight); }
.era-dutch   .card-era-badge { color: var(--color-gold); background: var(--color-gold-highlight); }
.era-spanish .card-era-badge { color: var(--color-warning); background: color-mix(in oklab, var(--color-warning), var(--color-surface) 80%); }
.era-treaty  .card-era-badge { color: var(--color-primary); background: var(--color-primary-highlight); }
.era-philips .card-era-badge { color: var(--color-gold); background: var(--color-gold-highlight); }
.era-labor   .card-era-badge { color: var(--color-text-muted); background: var(--color-surface-offset); }
.era-peak    .card-era-badge { color: var(--color-primary); background: var(--color-primary-highlight); font-weight: 700; }
.era-decline .card-era-badge { color: var(--color-text-faint); background: var(--color-surface-offset-2); }

.card-year {
  font-size: var(--text-2xl);
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-1);
}

.card-title {
  font-size: var(--text-lg);
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-5);
  line-height: 1.3;
}

.card-body {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  line-height: 1.75;
}

.card-body p {
  margin-bottom: var(--space-4);
}

.card-body p:last-child { margin-bottom: 0; }

.card-body strong { color: var(--color-text); font-weight: 600; }

.card-body em { font-style: italic; color: var(--color-text); }

.card-detail-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-8);
  margin-top: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
}

.detail-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.detail-label {
  font-size: var(--text-xs);
  font-family: var(--font-body);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-faint);
}

.detail-value {
  font-size: var(--text-sm);
  font-family: var(--font-body);
  font-weight: 500;
  color: var(--color-text);
}

.card-illustration {
  margin-top: var(--space-6);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  max-height: 200px;
}

.card-illustration svg {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

/* Treaty highlight */
.treaty-highlight {
  margin: var(--space-6) 0;
  padding: var(--space-6) var(--space-8);
  background: color-mix(in oklab, var(--color-primary), var(--color-surface) 90%);
  border: 1px solid color-mix(in oklab, var(--color-primary), transparent 60%);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--color-primary);
}

.treaty-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: italic;
  color: var(--color-text);
  line-height: 1.55;
  margin-bottom: var(--space-2);
  text-wrap: balance;
}

.treaty-text em { font-style: normal; color: var(--color-primary); }

.treaty-citation {
  font-size: var(--text-xs);
  font-family: var(--font-body);
  color: var(--color-text-faint);
  letter-spacing: 0.04em;
}

/* Philips stats */
.philips-stats {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
  margin: var(--space-6) 0;
  padding: var(--space-5) var(--space-6);
  background: color-mix(in oklab, var(--color-gold), var(--color-surface) 90%);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-gold-highlight);
}

.philips-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  flex: 1;
  min-width: 80px;
}

.ps-number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-gold);
  line-height: 1;
}

.ps-label {
  font-size: var(--text-xs);
  text-align: center;
  color: var(--color-text-muted);
  line-height: 1.3;
}

/* Peak production bar */
.peak-production-bar {
  margin: var(--space-6) 0;
}

.ppb-label {
  font-size: var(--text-xs);
  font-family: var(--font-body);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-3);
}

.ppb-track {
  background: var(--color-surface-offset);
  border-radius: var(--radius-full);
  height: 28px;
  overflow: hidden;
  margin-bottom: var(--space-2);
}

.ppb-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--color-primary) 0%, color-mix(in oklab, var(--color-primary), var(--color-gold) 40%) 100%);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  padding-left: var(--space-4);
  transition: width 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.ppb-value {
  font-size: var(--text-xs);
  font-weight: 700;
  color: #fff;
  white-space: nowrap;
}

.ppb-caption {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-style: italic;
}

/* --- PONDS SECTION --- */
.ponds-section {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-6);
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
}

.ponds-map-container {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.map-wrapper {
  position: relative;
  margin-bottom: var(--space-8);
}

#island-map {
  width: 100%;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  background: color-mix(in oklab, var(--color-blue), var(--color-bg) 80%);
  box-shadow: var(--shadow-md);
  height: auto;
}

.pond-marker {
  transition: opacity var(--transition-interactive);
}
.pond-marker:hover ellipse:first-child,
.pond-marker:hover ellipse:nth-child(2) {
  fill-opacity: 0.85;
}

.pond-info-panel {
  margin-top: var(--space-4);
  padding: var(--space-5) var(--space-6);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  min-height: 80px;
  transition: all var(--transition-interactive);
}

.pond-info-title {
  font-size: var(--text-base);
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.pond-info-body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

.pond-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-5);
}

.pond-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive), border-color var(--transition-interactive);
}

.pond-card:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
  border-color: var(--color-primary);
}

.pond-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.pond-card-header h4 {
  font-size: var(--text-base);
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-text);
}

.pond-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}
.pond-main { background: var(--color-primary); }
.pond-secondary { background: color-mix(in oklab, var(--color-primary), var(--color-surface) 40%); }
.pond-lagoon { background: var(--color-blue); }

.pond-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: var(--space-4);
}

.pond-card p strong { color: var(--color-text); }

.pond-facts {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
}

.pond-facts span {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.pond-facts strong { color: var(--color-text-muted); }

/* --- LEGACY SECTION --- */
.legacy-section {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-6);
  background: var(--color-bg);
  border-top: 1px solid var(--color-divider);
}

.legacy-grid {
  max-width: var(--content-default);
  margin: 0 auto var(--space-12);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-6);
}

.legacy-card {
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}

.legacy-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.legacy-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  border-radius: var(--radius-lg);
  flex-shrink: 0;
}

.legacy-card h3 {
  font-size: var(--text-base);
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.3;
}

.legacy-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  flex: 1;
}

.simarc-credit {
  max-width: var(--content-default);
  margin: 0 auto;
  padding: var(--space-6);
  background: var(--color-surface-offset);
  border-radius: var(--radius-lg);
  text-align: center;
}

.simarc-credit p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

.simarc-credit a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: color-mix(in oklab, var(--color-primary), transparent 60%);
  transition: color var(--transition-interactive), text-decoration-color var(--transition-interactive);
}

.simarc-credit a:hover {
  color: var(--color-primary-hover);
  text-decoration-color: var(--color-primary);
}

/* --- FOOTER --- */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  padding: var(--space-12) var(--space-6);
}

.footer-inner {
  max-width: var(--content-default);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  text-align: center;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 500;
}

.footer-tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 50ch;
  line-height: 1.5;
}

.footer-links {
  display: flex;
  gap: var(--space-6);
}

.footer-links a {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: color var(--transition-interactive);
}

.footer-links a:hover { color: var(--color-primary); }

.footer-credit {
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
  width: 100%;
}

.footer-credit a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.footer-credit a:hover { color: var(--color-primary); }

/* --- SCROLL REVEAL ANIMATIONS --- */
.fade-in {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 80%;
  }
  @keyframes reveal-fade {
    to { opacity: 1; }
  }
}

/* Apply to timeline items */
.timeline-item {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .timeline-item {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 5% entry 55%;
  }
}

.legacy-card, .pond-card, .stat-card {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .legacy-card, .pond-card, .stat-card {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 70%;
  }
}

/* --- RESPONSIVE --- */
@media (max-width: 640px) {
  .nav-links a { display: none; }
  .nav-links { gap: var(--space-3); }
  .hero { min-height: 75vh; padding: var(--space-16) var(--space-5); }
  .timeline::before { left: 14px; }
  .timeline-item { grid-template-columns: 28px 1fr; gap: var(--space-4); }
  .marker-dot { width: 12px; height: 12px; margin-top: var(--space-5); }
  .timeline-card { padding: var(--space-5) var(--space-5); }
  .card-year { font-size: var(--text-xl); }
  .philips-stats { flex-direction: row; justify-content: space-around; }
  .context-stat-row { grid-template-columns: 1fr 1fr; }
  .ponds-map-container { overflow-x: auto; }
}

@media (max-width: 480px) {
  .hero-cta-row { flex-direction: column; align-items: center; }
  .btn-primary, .btn-secondary { width: 100%; max-width: 280px; justify-content: center; }
  .footer-links { flex-wrap: wrap; justify-content: center; gap: var(--space-4); }
  .pond-cards { grid-template-columns: 1fr; }
}