/* Biomimicry */

:root {
  --bg-void: #050508;
  --bg-deep: #0a0a0f;
  --bg-card: #12121a;
  --gold: #d4af37;
  --gold-soft: #e8d48a;
  --gold-dark: #9a7b2a;
  --white-gold: #f5eed8;
  --indigo: #4a3f7a;
  --text-primary: #e8e4dc;
  --text-muted: #9a9588;
  --border: rgba(212, 175, 55, 0.15);
}

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

.skip-link {
  position: absolute; top: -100px; left: 1rem;
  padding: 0.5rem 1rem; background: var(--gold); color: var(--bg-deep);
  text-decoration: none; z-index: 200; transition: top 0.2s;
}
.skip-link:focus { top: 1rem; }

html { scroll-behavior: smooth; scroll-padding-top: 4rem; }

body {
  font-family: 'Crimson Pro', 'Cormorant Garamond', 'Georgia', serif;
  background: var(--bg-deep); color: var(--text-primary);
  line-height: 1.75; min-height: 100vh;
}

.ambient-bg {
  position: fixed; inset: 0;
  background:
    radial-gradient(ellipse 100% 80% at 50% -20%, rgba(74, 63, 122, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(212, 175, 55, 0.04) 0%, transparent 50%),
    var(--bg-deep);
  pointer-events: none; z-index: -2;
}

.particle-field {
  position: fixed; inset: 0;
  background-image:
    radial-gradient(1px 1px at 20% 30%, rgba(212, 175, 55, 0.3), transparent),
    radial-gradient(1px 1px at 60% 70%, rgba(212, 175, 55, 0.2), transparent),
    radial-gradient(1px 1px at 80% 20%, rgba(212, 175, 55, 0.25), transparent);
  background-size: 200% 200%;
  animation: particle-drift 30s ease-in-out infinite;
  pointer-events: none; z-index: -1; opacity: 0.6;
}
@keyframes particle-drift {
  0%, 100% { background-position: 0% 0%; }
  50% { background-position: 100% 100%; }
}

.header {
  position: fixed; top: 0; left: 0; right: 0;
  padding: 1rem 2rem;
  background: rgba(5, 5, 8, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.header-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
}

.logo { font-size: 1.2rem; font-weight: 600; color: var(--gold); text-decoration: none; }
.nav { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.nav a { color: var(--text-muted); text-decoration: none; font-size: 0.9rem; transition: color 0.3s; }
.nav a:hover { color: var(--gold-soft); }

.hero {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  padding: 8rem 2rem 4rem;
}

.hero-content { text-align: center; max-width: 750px; }

.hero-image-wrapper {
  margin-bottom: 2rem; border-radius: 12px; overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 0 80px rgba(212, 175, 55, 0.08);
}

.hero-img { width: 100%; max-width: 700px; height: auto; display: block; cursor: pointer; }

.hero h1 {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(2.75rem, 6vw, 4.5rem);
  font-weight: 600; margin-bottom: 0.5rem;
  color: var(--gold);
}

.tagline { font-size: 1.25rem; color: var(--text-muted); margin-bottom: 2rem; font-weight: 300; }

.opening-quote {
  margin: 2rem 0; padding: 1.5rem 2rem;
  border-left: 3px solid var(--gold);
  background: rgba(212, 175, 55, 0.04);
  text-align: left;
}

.opening-quote p { font-family: 'Cormorant Garamond', serif; font-size: 1.25rem; font-style: italic; color: var(--white-gold); }
.opening-quote cite { display: block; margin-top: 0.5rem; font-size: 0.95rem; color: var(--text-muted); }
.hero-intro { margin-top: 1.5rem; font-size: 1.05rem; color: var(--text-muted); }
.hero-intro strong { color: var(--gold); }

.section { padding: 5rem 2rem; opacity: 0; transform: translateY(28px); transition: opacity 0.8s ease, transform 0.8s ease; }
.section.revealed { opacity: 1; transform: translateY(0); }
.section.dark { background: linear-gradient(180deg, rgba(18, 18, 26, 0.5) 0%, rgba(10, 10, 15, 0.3) 100%); }

.container { max-width: 900px; margin: 0 auto; }

.section h2 {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(1.85rem, 3.5vw, 2.5rem);
  margin-bottom: 1rem; color: var(--gold); font-weight: 600;
}

.lead { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 1.5rem; font-style: italic; }
.section p { margin-bottom: 1rem; }

.content-with-image {
  display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; align-items: start; margin: 2rem 0;
}
.content-with-image.reverse { direction: rtl; }
.content-with-image.reverse > * { direction: ltr; }

.diagram-block { margin: 2rem 0; text-align: center; }
.diagram-block.full-width { grid-column: 1 / -1; }
.diagram-block img {
  max-width: 100%; height: auto; border-radius: 10px;
  border: 1px solid var(--border); cursor: pointer;
}
.diagram-block figcaption { font-size: 0.9rem; color: var(--text-muted); margin-top: 0.75rem; font-style: italic; }

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem; margin: 2.5rem 0;
}

.gallery-grid figure {
  margin: 0; background: var(--bg-card);
  border: 1px solid var(--border); border-radius: 10px;
  overflow: hidden; transition: transform 0.3s, box-shadow 0.3s;
}

.gallery-grid figure:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.gallery-grid img { width: 100%; height: 160px; object-fit: cover; cursor: pointer; }
.gallery-grid figcaption { padding: 0.75rem; font-size: 0.85rem; color: var(--text-muted); }

.coda { padding-bottom: 4rem; }
.coda-image { margin-bottom: 2rem; text-align: center; }
.coda-image img { max-width: 100%; border-radius: 10px; border: 1px solid var(--border); cursor: pointer; }

.coda blockquote.closing {
  margin-top: 2.5rem; padding: 2rem 2.5rem;
  border-left: 4px solid var(--gold);
  background: rgba(212, 175, 55, 0.06);
  font-style: italic; font-size: 1.15rem;
}
.closing p { color: var(--white-gold); }

.footer { padding: 3rem 2rem; text-align: center; border-top: 1px solid var(--border); }
.footer p { font-size: 0.95rem; color: var(--text-muted); }
.footer .fine { font-size: 0.85rem; margin-top: 0.5rem; opacity: 0.85; }
.footer .back-link { display: inline-block; margin-right: 1rem; color: var(--gold); }
.footer .back-to-top { display: inline-block; margin-top: 1rem; color: var(--gold); text-decoration: none; opacity: 0.7; }
.footer .back-to-top:hover { opacity: 1; }

@media (max-width: 900px) {
  .content-with-image, .content-with-image.reverse { grid-template-columns: 1fr; direction: ltr; }
}

@media (max-width: 600px) {
  .hero { padding: 6rem 1rem 3rem; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
}