/* ===== GOOGLE FONTS ===== */
@import url('https://fonts.googleapis.com/css2?family=Martian+Mono:wght@300;400;600&display=swap');

/* ===== FONTS ===== */

/* Stellage Display — main display */
@font-face { font-family: 'Stellage'; src: url('../fonts/Stellage-Display.otf') format('opentype'); font-weight: 400; font-style: normal; font-display: swap; }

/* AlbraDisplay — editorial headings (GT Super equivalent) */
@font-face { font-family: 'AlbraDisplay'; src: url('../fonts/AlbraDisplay-Regular.otf') format('opentype'); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: 'AlbraDisplay'; src: url('../fonts/AlbraDisplay-Italic.otf') format('opentype'); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: 'AlbraDisplay'; src: url('../fonts/AlbraDisplay-Bold.otf') format('opentype'); font-weight: 700; font-style: normal; font-display: swap; }
@font-face { font-family: 'AlbraDisplay'; src: url('../fonts/AlbraDisplay-Bold-Italic.otf') format('opentype'); font-weight: 700; font-style: italic; font-display: swap; }

/* AlbraBook — supporting serif text */
@font-face { font-family: 'Albra'; src: url('../fonts/AlbraBook-Light.otf') format('opentype'); font-weight: 300; font-style: normal; font-display: swap; }
@font-face { font-family: 'Albra'; src: url('../fonts/AlbraBook-Regular.otf') format('opentype'); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: 'Albra'; src: url('../fonts/AlbraBook-Medium.otf') format('opentype'); font-weight: 500; font-style: normal; font-display: swap; }

/* GT Walsheim — body text */
@font-face { font-family: 'GT Walsheim'; src: url('../fonts/GTWalsheim-Regular.ttf') format('truetype'); font-weight: 400; font-style: normal; font-display: swap; }

/* ===== TOKENS ===== */
:root {
  --bg-rgb:    240, 244, 252;
  --bg:        #f0f4fc;
  --bg2:       #e5eaf6;
  --bg3:       #d8deee;
  --text:      #0c1226;
  --text2:     #2d4575;
  --text3:     #6575a0;
  --accent:    #1ca358;
  --accent2:   #1a3d8f;
  --gold:      #4ab815;
  --border:    rgba(26,61,143,0.10);
  --border2:   rgba(26,61,143,0.22);
  --shadow:    0 4px 32px rgba(12,18,38,0.12);

  --font-display:  'Stellage', 'Coconat', sans-serif;
  --font-serif:    'AlbraDisplay', 'Albra', Georgia, serif;
  --font-sans:     'GT Walsheim', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:     'Martian Mono', 'Messapia', monospace;
  --nav-h: 64px;
  --t:  0.3s ease;
  --ts: 0.6s ease;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.65;
  overflow-x: hidden;
  transition: background var(--t), color var(--t);
  padding-top: var(--nav-h);
}
a { color: inherit; text-decoration: none; }
img, video { max-width: 100%; display: block; }
button { cursor: pointer; font-family: inherit; }
ul { list-style: none; }

/* ===== NAV ===== */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
  background: rgba(var(--bg-rgb), 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: background var(--t), border-color var(--t);
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--text);
  transition: color var(--t);
  white-space: nowrap;
}
.nav-logo:hover { color: var(--accent); }
.nav-links {
  display: flex;
  gap: 2.5rem;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}
.nav-links a {
  color: var(--text2);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transition: color var(--t);
  position: relative;
  padding-bottom: 2px;
  white-space: nowrap;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--t);
}
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }

.theme-toggle {
  background: none;
  border: 1px solid var(--border2);
  color: var(--text2);
  width: 36px; height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--t), border-color var(--t), transform 0.25s;
  flex-shrink: 0;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); transform: rotate(20deg); }
.theme-toggle svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* ===== PAGE HEADER ===== */
.page-header {
  padding: 5rem 2.5rem 3.5rem;
  text-align: center;
}
.page-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.page-header h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 400;
  letter-spacing: 0.02em;
  line-height: 1.15;
  margin-bottom: 1rem;
}
.page-header p {
  color: var(--text2);
  max-width: 55ch;
  margin: 0 auto;
  font-size: 1rem;
}

/* ===== LAYOUT ===== */
.container        { max-width: 1200px; margin: 0 auto; padding: 0 2.5rem; }
.container-narrow { max-width: 860px;  margin: 0 auto; padding: 0 2.5rem; }
section { padding: 4rem 0; }
.divider { width: 48px; height: 1px; background: var(--accent); margin: 2rem auto; }

/* ===== CATEGORY CARDS ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}
.cat-card {
  position: relative;
  display: block;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  aspect-ratio: 3/4;
  background: var(--bg2);
  transition: border-color var(--t), transform var(--ts);
}
.cat-card:hover { border-color: var(--border2); transform: translateY(-6px); }
.cat-card-img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.65;
  transition: opacity var(--ts), transform var(--ts);
}
.cat-card:hover .cat-card-img { opacity: 0.85; transform: scale(1.04); }
.cat-card-body {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 2.5rem 1.5rem 1.5rem;
  background: linear-gradient(transparent, rgba(0,0,0,0.85));
}
.cat-card-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 400;
  color: #fff;
  letter-spacing: 0.03em;
  margin-bottom: 0.3rem;
}
.cat-card-sub {
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
}
/* Placeholder card (no image) */
.cat-card-placeholder { background: var(--bg3); }
.cat-card-placeholder .cat-card-body { background: none; position: relative; padding: 2rem; display: flex; flex-direction: column; justify-content: flex-end; height: 100%; }
.cat-card-placeholder .cat-card-title { color: var(--text); }
.cat-card-placeholder .cat-card-sub { color: var(--text2); }
.cat-card-placeholder .cat-geo {
  position: absolute;
  top: 50%;  left: 50%;
  transform: translate(-50%, -50%);
  width: 80px; height: 80px;
  opacity: 0.08;
  stroke: var(--accent);
  stroke-width: 1;
  fill: none;
}

/* ===== GALLERY GRID ===== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 0.75rem;
}
.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: 3px;
  background: var(--bg2);
  aspect-ratio: 4/3;
}
.gallery-item.tall  { aspect-ratio: 3/4; }
.gallery-item.wide  { aspect-ratio: 16/9; }
.gallery-item img, .gallery-item video {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform var(--ts);
}
.gallery-item:hover img, .gallery-item:hover video { transform: scale(1.04); }
.gallery-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(transparent 40%, rgba(0,0,0,0.8));
  opacity: 0;
  transition: opacity var(--t);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.5rem;
}
.gallery-item:hover .gallery-overlay { opacity: 1; }
.gallery-title { font-family: var(--font-serif); font-size: 1rem; color: #fff; margin-bottom: 0.25rem; }
.gallery-desc  { font-size: 0.78rem; color: rgba(255,255,255,0.7); line-height: 1.45; }

/* Empty gallery placeholder */
.gallery-placeholder {
  text-align: center;
  padding: 6rem 2rem;
  color: var(--text3);
  border: 1px dashed var(--border2);
  border-radius: 4px;
  font-size: 0.9rem;
  line-height: 2;
}

/* ===== BACK LINK ===== */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text2);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 1.5rem 2.5rem 0;
  transition: color var(--t);
}
.back-link:hover { color: var(--accent); }
.back-link svg { width: 14px; height: 14px; stroke: currentColor; stroke-width: 2; fill: none; }

/* ===== FOOTER ===== */
.site-footer {
  padding: 0;
  text-align: center;
  border-top: none;
  color: var(--text3);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  margin-top: 4rem;
  min-height: 220px;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }

/* ===== THEME TOGGLE — hidden (light mode only) ===== */
.theme-toggle { display: none; }

/* ===== PAGE HEADER — colour wash + fade to white ===== */
.page-header {
  position: relative;
  overflow: hidden;
}
.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 18% 60%, rgba(28,163,88,0.38) 0%, transparent 55%),
    radial-gradient(ellipse at 82% 35%, rgba(26,61,143,0.34) 0%, transparent 55%),
    radial-gradient(ellipse at 50% 5%,  rgba(26,61,143,0.18) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}
/* fade within the header — bottom 80px dissolve to page bg */
.page-header::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  bottom: 0;
  height: 80px;
  background: linear-gradient(to bottom, transparent, var(--bg));
  pointer-events: none;
  z-index: 2;
}
.page-header > * { position: relative; z-index: 1; }

/* ===== CARDS — more colour on hover ===== */
.cat-card:hover {
  border-color: var(--accent2);
  box-shadow: 0 8px 40px rgba(26,61,143,0.14);
}
.explore-card:hover {
  border-color: var(--accent2);
  box-shadow: 0 6px 28px rgba(26,61,143,0.12);
  background: linear-gradient(135deg,
    rgba(28,163,88,0.04) 0%,
    rgba(26,61,143,0.04) 100%);
}
.explore-card svg { transition: stroke var(--t), transform var(--ts); }
.explore-card:hover svg { stroke: var(--accent2); transform: scale(1.12); }

/* ===== GALLERY ITEMS — coloured hover border ===== */
.gallery-item::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 2px solid transparent;
  border-radius: 3px;
  transition: border-color var(--t);
  pointer-events: none;
}
.gallery-item:hover::after { border-color: var(--accent); }

/* ===== DIVIDER — animated gradient ===== */
.divider {
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  animation: divSlide 2.5s ease infinite alternate;
}
@keyframes divSlide { from { opacity: 0.5; } to { opacity: 1; } }

/* ===== SECTION labels — dual-colour underline ===== */
.page-label {
  position: relative;
  display: inline-block;
}
.page-label::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 100%; height: 1px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s ease;
}
.page-header .page-label::after,
.page-header:hover .page-label::after { transform: scaleX(1); }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .site-nav { padding: 0 1.25rem; }
  .nav-links { display: none; }
  .container, .container-narrow { padding: 0 1.25rem; }
  .page-header { padding: 3rem 1.25rem 2rem; }
  .back-link { padding: 1.25rem 1.25rem 0; }
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}