/* =========================================================
   Brain Codex — Shared Stylesheet
   bc.css · /css/bc.css
   ========================================================= */

/* --- Tokens --- */
:root {
  --ink: #0a0e14;
  --ink-2: #111821;
  --ink-3: #18212e;
  --parchment: #f0ebe3;
  --parchment-dim: rgba(240,235,227,0.7);
  --parchment-muted: rgba(240,235,227,0.45);
  --gold: #c9a96e;
  --gold-light: #e0c992;
  --gold-dim: rgba(201,169,110,0.3);
  --teal: #1a5568;
  --teal-mid: #257a8f;
  --teal-light: #3eabc4;
  --teal-glow: rgba(62,171,196,0.15);
  --line: rgba(201,169,110,0.15);
}

/* --- Reset --- */
*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }
html { scroll-behavior:smooth; font-size:17px; }
body {
  background: var(--ink);
  color: var(--parchment);
  font-family: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  line-height: 1.78;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
body::after {
  content:'';
  position:fixed; inset:0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");
  pointer-events:none; z-index:9999;
}
a { color: var(--teal-light); text-decoration:none; transition: color 0.3s; }
a:hover { color: var(--gold); }
img { max-width:100%; height:auto; display:block; }
.container { max-width:1200px; margin:0 auto; padding:0 2.5rem; }

/* --- Reveal animation --- */
.reveal {
  opacity:0; transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.25,0.46,0.45,0.94),
              transform 0.8s cubic-bezier(0.25,0.46,0.45,0.94);
}
.reveal.visible { opacity:1; transform: translateY(0); }

/* --- Typography utilities --- */
.section-label {
  font-family: 'Josefin Sans', sans-serif; font-weight: 300; font-size: 0.7rem;
  letter-spacing: 0.3em; text-transform: uppercase; color: var(--gold); margin-bottom: 1rem;
}
.section-title {
  font-size: clamp(2rem, 4vw, 3.2rem); font-weight: 300; line-height: 1.2;
  color: var(--parchment); letter-spacing: -0.01em;
}
.section-title em { font-style: italic; color: var(--teal-light); }

/* =========================================================
   NAV
   ========================================================= */
nav {
  position: fixed; top:0; left:0; right:0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.2rem 3rem;
  background: linear-gradient(180deg, rgba(10,14,20,0.97) 0%, rgba(10,14,20,0.85) 60%, transparent 100%);
  transition: background 0.4s;
}
nav.scrolled {
  background: rgba(10,14,20,0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-brand { display: flex; align-items: center; gap: 0.8rem; text-decoration: none; }
.nav-brand-icon { height: 28px; width: auto; opacity: 0.85; transition: opacity 0.3s; }
.nav-brand:hover .nav-brand-icon { opacity: 1; }
.nav-brand-text {
  font-family: 'Josefin Sans', sans-serif; font-weight: 300; font-size: 0.72rem;
  letter-spacing: 0.3em; text-transform: uppercase; color: var(--gold);
}
.nav-brand-text span {
  display:block; font-size:0.5rem; letter-spacing:0.45em;
  color: var(--teal-light); margin-top:1px; white-space:nowrap;
}
.nav-links { display: flex; gap: 2.5rem; list-style: none; }
.nav-links a {
  font-family: 'Josefin Sans', sans-serif; font-weight: 300; font-size: 0.68rem;
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--parchment-muted);
  text-decoration: none; transition: color 0.3s; position: relative;
}
.nav-links a::after {
  content:''; position:absolute; bottom:-4px; left:0; right:0; height:1px;
  background: var(--gold); transform: scaleX(0); transition: transform 0.3s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--parchment); }
.nav-links a:hover::after,
.nav-links a.active::after { transform: scaleX(1); }
.nav-toggle {
  display:none; background:none; border:none;
  color: var(--parchment); font-size:1.5rem; cursor:pointer;
}
@media (max-width:768px) {
  nav { padding:1rem 1.5rem; }
  .nav-toggle { display:block; }
  .nav-links {
    display:none; position:absolute; top:100%; left:0; right:0;
    background: rgba(10,14,20,0.98); flex-direction:column;
    padding:2rem; gap:1.5rem; border-bottom:1px solid var(--line);
  }
  .nav-links.open { display:flex; }
}

/* --- Dropdown --- */
.nav-dropdown { position: relative; }
.nav-dropdown-toggle { cursor: pointer; }
.nav-submenu {
  display: none; position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
  background: rgba(10,14,20,0.97); backdrop-filter: blur(12px);
  border: 1px solid var(--line); min-width: 180px;
  list-style: none; z-index: 200; padding-top: 1rem;
}
.nav-submenu::before {
  content: ''; position: absolute; top: -1rem; left: 0; right: 0; height: 1rem;
}
.nav-dropdown:hover > .nav-submenu,
.nav-dropdown:focus-within > .nav-submenu { display: flex; flex-direction: column; }
.nav-submenu li { padding: 0; }
.nav-submenu a {
  font-family: 'Josefin Sans', sans-serif; font-weight: 300; font-size: 0.65rem;
  letter-spacing: 0.15em; text-transform: uppercase; color: var(--parchment-muted);
  text-decoration: none; padding: 0.5rem 1.4rem; display: block;
  transition: color 0.3s, background 0.3s;
}
.nav-submenu a:hover,
.nav-submenu a.active { color: var(--parchment); background: rgba(201,169,110,0.08); }

/* =========================================================
   FOOTER
   ========================================================= */
footer {
  display: flex; flex-direction: column;
  align-items: center; gap: 0.4rem;
  padding: 1.5rem 1rem;
  border-top: 1px solid var(--line);
}
@media (min-width: 700px) {
  footer { flex-direction: row; justify-content: space-between; }
}
.footer-logo {
  font-family:'Josefin Sans',sans-serif; font-weight:300; font-size:0.7rem;
  letter-spacing:0.3em; text-transform:uppercase; color:var(--parchment-muted);
}
.footer-copy { font-size:0.75rem; color:rgba(240,235,227,0.3); }
#cy-effective-orcid-url {
  display: inline-flex; align-items: center; gap: 0.5em;
  color: #d4b06a; font-size: 0.85rem;
}
#cy-effective-orcid-url:hover { color: #e8c98a; }

/* =========================================================
   SHARED UTILITIES
   ========================================================= */
.btn-primary {
  font-family:'Josefin Sans',sans-serif; font-weight:300; font-size:0.72rem;
  letter-spacing:0.2em; text-transform:uppercase; padding:0.9rem 2.5rem;
  border:1px solid var(--gold); color: var(--gold); background:transparent;
  text-decoration:none; transition: all 0.4s; cursor:pointer;
}
.btn-primary:hover { background: var(--gold); color: var(--ink); }
.btn-ghost {
  font-family:'Josefin Sans',sans-serif; font-weight:300; font-size:0.72rem;
  letter-spacing:0.2em; text-transform:uppercase; padding:0.9rem 2.5rem;
  border:1px solid var(--line); color: var(--parchment-muted);
  text-decoration:none; transition: all 0.4s;
}
.btn-ghost:hover { border-color: var(--parchment-muted); color: var(--parchment); }
.email-btn {
  display:inline-flex; align-items:center;
  font-family:'Josefin Sans',sans-serif; font-weight:300; font-size:0.72rem;
  letter-spacing:0.15em; text-transform:uppercase; padding:0.6rem 1.8rem;
  border:1px solid var(--gold); color:var(--gold); background:transparent;
  text-decoration:none; transition: all 0.4s; cursor:pointer;
}
.email-btn:hover { background:var(--gold); color:var(--ink); }
.email-btn:hover svg { stroke:var(--ink); }
.back-link {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-family: 'Josefin Sans', sans-serif; font-weight: 300; font-size: 0.65rem;
  letter-spacing: 0.15em; text-transform: uppercase; color: var(--parchment-muted);
  margin-bottom: 2rem; transition: color 0.3s;
}
.back-link:hover { color: var(--gold); }