/* Simulation Theory — shared styles */
:root {
  --bg: #0c0e13;
  --bg-soft: #12151d;
  --card: #161a24;
  --line: #262c3a;
  --text: #d8dbe4;
  --text-dim: #8b91a3;
  --accent: #7dd3fc;
  --accent-dim: #4a8bab;
  --serif: "Cormorant Garamond", Georgia, serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Nav ---------- */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 2rem;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(12, 14, 19, 0.92);
  backdrop-filter: blur(8px);
  z-index: 10;
}

.brand {
  font-family: var(--serif);
  font-size: 1.25rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text);
  text-decoration: none;
  position: relative;
}
.brand:hover { color: var(--accent); }
.brand:hover::after {
  content: "S1MULAT10N THE0RY";
  position: absolute;
  left: 2px; top: 0;
  color: var(--accent);
  opacity: 0.35;
  overflow: hidden;
  animation: glitch 0.35s steps(2) infinite;
}
@keyframes glitch {
  0% { clip-path: inset(0 0 60% 0); transform: translateX(-2px); }
  50% { clip-path: inset(55% 0 10% 0); transform: translateX(2px); }
  100% { clip-path: inset(20% 0 40% 0); transform: translateX(-1px); }
}

.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  margin-left: 1.6rem;
  font-size: 0.92rem;
  letter-spacing: 0.04em;
}
.nav-links a:hover, .nav-links a.active { color: var(--accent); }

/* ---------- Layout ---------- */
main { max-width: 880px; margin: 0 auto; padding: 3rem 1.5rem 5rem; }

h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 2.6rem;
  line-height: 1.15;
  margin-bottom: 0.6rem;
}
h2 { font-family: var(--serif); font-weight: 600; font-size: 1.7rem; margin: 2.2rem 0 0.8rem; }
.kicker {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.75rem;
  margin-bottom: 1rem;
}
.lede { color: var(--text-dim); font-size: 1.08rem; max-width: 60ch; }

/* ---------- Hero (home) ---------- */
.hero { text-align: center; padding: 5rem 1rem 3.5rem; }
.hero h1 { font-size: 3.4rem; letter-spacing: 0.06em; }
.hero .lede { margin: 1rem auto 2.2rem; }
.btn {
  display: inline-block;
  padding: 0.7rem 1.5rem;
  margin: 0 0.4rem;
  border: 1px solid var(--accent-dim);
  border-radius: 4px;
  color: var(--accent);
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  transition: background 0.2s, color 0.2s;
}
.btn:hover { background: var(--accent); color: var(--bg); }
.btn.ghost { border-color: var(--line); color: var(--text-dim); }
.btn.ghost:hover { background: var(--card); color: var(--text); }

/* ---------- Cards ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 1.2rem; margin-top: 1.5rem; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.4rem;
  transition: border-color 0.2s, transform 0.2s;
}
a.card { text-decoration: none; color: var(--text); display: block; }
.card:hover { border-color: var(--accent-dim); transform: translateY(-2px); }
.card h3 { font-family: var(--serif); font-size: 1.35rem; margin-bottom: 0.3rem; }
.card p { color: var(--text-dim); font-size: 0.92rem; }
.tag {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  border-radius: 3px;
  padding: 0.1rem 0.5rem;
  margin-bottom: 0.7rem;
}

/* ---------- Character profiles ---------- */
.portrait {
  width: 100%;
  aspect-ratio: 3 / 4;
  border: 1px dashed var(--line);
  border-radius: 6px;
  background:
    repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(125, 211, 252, 0.03) 10px, rgba(125, 211, 252, 0.03) 20px),
    var(--bg-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.profile { display: grid; grid-template-columns: 240px 1fr; gap: 2rem; margin: 2.5rem 0; align-items: start; }
.profile dl { margin-top: 0.8rem; }
.profile dt { color: var(--accent); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.15em; margin-top: 0.7rem; }
.profile dd { color: var(--text-dim); font-size: 0.95rem; }
.locked { filter: blur(0.5px); }
.locked h2 { color: var(--text-dim); }

/* ---------- Chapter prose ---------- */
.prose { font-size: 1.12rem; }
.prose p { margin-bottom: 1.3rem; }
.prose .first-letter::first-letter {
  font-family: var(--serif);
  font-size: 3.2em;
  float: left;
  line-height: 0.85;
  padding-right: 0.12em;
  color: var(--accent);
}
.chapter-meta { color: var(--text-dim); font-size: 0.85rem; margin-bottom: 2.5rem; letter-spacing: 0.05em; }
.chapter-nav { display: flex; justify-content: space-between; margin-top: 3.5rem; padding-top: 1.5rem; border-top: 1px solid var(--line); }
.divider { text-align: center; color: var(--accent-dim); letter-spacing: 0.8em; margin: 2rem 0; }

/* ---------- Video placeholders ---------- */
.video-frame {
  aspect-ratio: 16 / 9;
  border: 1px dashed var(--line);
  border-radius: 8px;
  background: var(--bg-soft);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  gap: 0.4rem;
  margin-bottom: 0.8rem;
}
.video-frame span:first-child { font-size: 2rem; color: var(--accent-dim); }

footer {
  border-top: 1px solid var(--line);
  color: var(--text-dim);
  text-align: center;
  font-size: 0.8rem;
  padding: 2rem;
  letter-spacing: 0.08em;
}

@media (max-width: 640px) {
  nav { flex-direction: column; gap: 0.6rem; padding: 0.9rem 1rem; }
  .nav-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.4rem 1.1rem; }
  .nav-links a { margin-left: 0; font-size: 0.88rem; }
  main { padding: 2rem 1.1rem 4rem; }
  .hero { padding: 3rem 0.5rem 2.5rem; }
  .hero h1 { font-size: 2.3rem; }
  h1 { font-size: 2.1rem; }
  .prose { font-size: 1.05rem; }
  .profile { grid-template-columns: 1fr; }
  .portrait { max-width: 260px; }
}