/* =============================================
   Atlas of Lie Groups — Shared Stylesheet
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=EB+Garamond:ital,wght@0,400;0,500;0,600;1,400;1,500&family=Cormorant+Garamond:ital,wght@0,300;0,400;0,600;1,300;1,400&family=JetBrains+Mono:wght@300;400&display=swap');

:root {
  --navy:        #ffffff;
  --navy-mid:    #f0f2f6;
  --navy-light:  #e4e8f0;
  --gold:        #4a7aaa;
  --gold-light:  #6b9ac4;
  --gold-dim:    #2a5a8a;
  --cream:       #162040;
  --cream-dim:   #364060;
  --text:        #162040;
  --text-muted:  #607090;
  --accent:      #6b9ac4;
  --border:      rgba(22,32,64,0.15);
  --border-light:rgba(22,32,64,0.07);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--navy);
  color: var(--text);
  font-family: 'EB Garamond', Georgia, serif;
  font-size: 18px;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 15% 10%, rgba(74,122,170,.04) 0%, transparent 60%),
    radial-gradient(ellipse 60% 80% at 85% 80%, rgba(107,154,196,.03) 0%, transparent 60%),
    repeating-linear-gradient(0deg, transparent, transparent 79px, rgba(22,32,64,.025) 80px),
    repeating-linear-gradient(90deg, transparent, transparent 79px, rgba(22,32,64,.025) 80px);
  pointer-events: none;
  z-index: 0;
}

/* ── NAVIGATION ── */
nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(22,32,64,.97);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 0 2.5rem;
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.nav-brand {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-weight: 300; font-size: 1.05rem; letter-spacing: .04em;
  color: var(--gold-light); text-decoration: none; white-space: nowrap;
}
.nav-brand span { color: var(--text-muted); font-style: italic; }
.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
  color: var(--text-muted); text-decoration: none;
  font-size: .78rem; letter-spacing: .1em; text-transform: uppercase;
  font-family: 'JetBrains Mono', monospace; font-weight: 300;
  transition: color .2s; padding: .25rem 0;
}
.nav-links a:hover, .nav-links a.active { color: var(--gold-light); }

/* ── PAGE WRAPPER ── */
.page-content {
  position: relative; z-index: 1;
  animation: fadeIn .3s ease;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── CONTAINER ── */
.container { max-width: 1200px; margin: 0 auto; padding: 4rem 3rem; }

/* ── TYPOGRAPHY ── */
.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: .7rem; letter-spacing: .25em; text-transform: uppercase;
  color: var(--gold-dim); margin-bottom: .8rem;
}
h1 {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-weight: 300; font-size: clamp(2.5rem, 5vw, 4rem);
  line-height: 1.1; color: var(--cream); margin-bottom: .3em;
}
h1 em { font-style: italic; color: var(--gold-light); }
h2 {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-weight: 400; font-size: clamp(1.5rem, 3vw, 2.2rem);
  color: var(--cream); line-height: 1.2; margin-bottom: .8rem;
}
h2 em { font-style: italic; color: var(--gold-light); }
h3 {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-weight: 400; font-size: 1.25rem; color: var(--cream); margin-bottom: .5rem;
}
p { margin-bottom: 1rem; }
.lead {
  font-size: 1rem; color: var(--text-muted);
  line-height: 1.8; margin-bottom: 2rem; max-width: 680px;
}
a { color: var(--gold-light); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── BUTTONS ── */
.btn-primary {
  display: inline-flex; align-items: center; gap: .6rem;
  background: var(--gold); color: var(--navy); text-decoration: none;
  padding: .7rem 1.6rem; font-family: 'JetBrains Mono', monospace;
  font-size: .78rem; letter-spacing: .1em; text-transform: uppercase;
  border: none; cursor: pointer; transition: background .2s, transform .15s;
}
.btn-primary:hover { background: var(--gold-light); transform: translateY(-1px); text-decoration: none; }
.btn-secondary {
  display: inline-flex; align-items: center; gap: .6rem;
  border: 1px solid var(--border); color: var(--text-muted); text-decoration: none;
  padding: .7rem 1.6rem; font-family: 'JetBrains Mono', monospace;
  font-size: .78rem; letter-spacing: .1em; text-transform: uppercase;
  background: none; cursor: pointer; transition: border-color .2s, color .2s;
}
.btn-secondary:hover { border-color: var(--gold-dim); color: var(--gold-light); text-decoration: none; }
.btn-row { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 1.5rem; }

/* ── DIVIDER ── */
hr.divider { border: none; border-top: 1px solid var(--border-light); margin: 3rem 0; }

/* ── CARDS (nav-style) ── */
.card-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.4rem; }
.card-grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.4rem; }
.card {
  background: var(--navy-mid); border: 1px solid var(--border-light);
  padding: 1.8rem; text-decoration: none; display: block; color: inherit;
  transition: border-color .2s, background .2s, transform .15s;
  position: relative; overflow: hidden;
}
.card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--gold); transform: scaleX(0); transform-origin: left;
  transition: transform .3s;
}
.card:hover { border-color: var(--border); background: var(--navy-light); transform: translateY(-2px); text-decoration: none; }
.card:hover::before { transform: scaleX(1); }
.card-icon { font-size: 1.4rem; margin-bottom: .8rem; display: block; opacity: .7; }
.card p { font-size: .86rem; color: var(--text-muted); line-height: 1.65; margin: 0; }
.card-arrow {
  display: inline-flex; align-items: center; gap: .4rem;
  font-family: 'JetBrains Mono', monospace; font-size: .68rem;
  letter-spacing: .1em; color: var(--gold-dim); margin-top: 1rem;
  text-transform: uppercase; transition: color .2s, gap .2s;
}
.card:hover .card-arrow { color: var(--gold-light); gap: .6rem; }

/* ── MISSION GRID ── */
.mission-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border); }
.mission-card { background: var(--navy-mid); padding: 2.2rem; transition: background .2s; }
.mission-card:hover { background: var(--navy-light); }
.card-num { font-family: 'JetBrains Mono', monospace; font-size: .63rem; color: var(--gold-dim); letter-spacing: .2em; margin-bottom: 1rem; }
.mission-card p { font-size: .92rem; color: var(--text-muted); line-height: 1.75; margin: 0; }

/* ── ANNOUNCEMENT BAND ── */
.announce {
  background: rgba(201,168,76,.06);
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  padding: 1.4rem 3rem; display: flex; align-items: flex-start; gap: 1.8rem;
}
.announce-tag {
  flex-shrink: 0; background: var(--gold); color: var(--navy);
  font-family: 'JetBrains Mono', monospace; font-size: .62rem;
  letter-spacing: .15em; text-transform: uppercase; padding: .3rem .65rem; margin-top: .22rem;
}
.announce p { font-size: .92rem; color: var(--cream-dim); line-height: 1.6; margin: 0; }

/* ── HIGHLIGHT BAND ── */
.highlight-band { background: var(--navy-mid); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.highlight-inner {
  max-width: 1200px; margin: 0 auto; padding: 4rem 3rem;
  display: grid; grid-template-columns: 1fr 1.4fr; gap: 5rem; align-items: center;
}
.stat-block { display: flex; flex-direction: column; gap: 1.5rem; }
.stat-num { font-family: 'Cormorant Garamond', Georgia, serif; font-weight: 300; font-size: clamp(2.5rem,5vw,4rem); line-height: 1; letter-spacing: -.02em; }
.stat-num.gold   { color: var(--gold); }
.stat-num.accent { color: var(--accent); }
.stat-num.dim    { color: var(--cream-dim); }
.stat-label { font-family: 'JetBrains Mono', monospace; font-size: .68rem; letter-spacing: .15em; color: var(--text-muted); text-transform: uppercase; margin-top: .3rem; }
.highlight-text p { font-size: .94rem; color: var(--text-muted); line-height: 1.8; margin-bottom: .8rem; }

/* ── PAPERS ── */
.papers-section { margin-bottom: 2.5rem; }
.papers-section-title {
  font-family: 'JetBrains Mono', monospace; font-weight: 400;
  font-size: .75rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--gold-dim); border-bottom: 1px solid var(--border-light);
  padding-bottom: .5rem; margin-bottom: 1.2rem;
}
.paper-item {
  padding: 1.2rem 0; border-bottom: 1px solid var(--border-light);
  display: grid; grid-template-columns: 1fr auto; gap: 1.5rem; align-items: start;
}
.paper-item:last-child { border-bottom: none; }
.paper-title { font-family: 'Cormorant Garamond', Georgia, serif; font-size: 1.08rem; color: var(--cream); margin-bottom: .2rem; }
.paper-authors { font-family: 'JetBrains Mono', monospace; font-size: .63rem; color: var(--text-muted); letter-spacing: .04em; margin-bottom: .35rem; }
.paper-desc { font-size: .88rem; color: var(--text-muted); line-height: 1.65; margin: 0; }
.paper-link {
  flex-shrink: 0; display: inline-flex; align-items: center; gap: .3rem;
  font-family: 'JetBrains Mono', monospace; font-size: .65rem;
  color: var(--gold-dim); text-decoration: none; letter-spacing: .04em;
  padding: .35rem .8rem; border: 1px solid rgba(201,168,76,.15); white-space: nowrap;
  transition: color .2s, border-color .2s;
}
.paper-link:hover { color: var(--gold-light); border-color: var(--border); text-decoration: none; }
.badge {
  display: inline-block; font-family: 'JetBrains Mono', monospace;
  font-size: .55rem; color: var(--gold-dim); border: 1px solid rgba(201,168,76,.3);
  padding: .1rem .4rem; letter-spacing: .08em; text-transform: uppercase;
  vertical-align: middle; margin-left: .5rem;
}

/* ── PEOPLE ── */
.people-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1rem; }
.person-card {
  border: 1px solid var(--border-light); padding: 1.4rem 1.6rem;
  background: var(--navy-mid); transition: border-color .2s;
}
.person-card:hover { border-color: var(--border); }
.person-name { font-family: 'Cormorant Garamond', Georgia, serif; font-size: 1.1rem; color: var(--cream); margin-bottom: .15rem; }
.person-inst { font-family: 'JetBrains Mono', monospace; font-size: .62rem; color: var(--text-muted); letter-spacing: .04em; margin-bottom: .3rem; }
.person-email { font-family: 'JetBrains Mono', monospace; font-size: .6rem; color: var(--gold-dim); }
.person-card a { color: var(--gold-dim); }
.person-card a:hover { color: var(--gold-light); }

/* ── WORKSHOPS ── */
.workshop-list { display: flex; flex-direction: column; gap: 1px; background: var(--border-light); }
.workshop-item {
  background: var(--navy-mid); padding: 1.6rem 2rem;
  display: flex; align-items: center; gap: 2rem; transition: background .2s;
}
.workshop-item:hover { background: var(--navy-light); }
.workshop-year { font-family: 'Cormorant Garamond', Georgia, serif; font-size: 2rem; color: var(--gold); font-weight: 300; min-width: 80px; line-height: 1; }
.workshop-info h3 { font-size: 1.05rem; margin-bottom: .2rem; }
.workshop-info .loc { font-family: 'JetBrains Mono', monospace; font-size: .68rem; color: var(--text-muted); letter-spacing: .07em; }
.workshop-link { margin-left: auto; flex-shrink: 0; }

/* ── DOCS ── */
.docs-layout { display: grid; grid-template-columns: 240px 1fr; gap: 3rem; align-items: start; }
.docs-sidebar { position: sticky; top: 80px; background: var(--navy-mid); border: 1px solid var(--border-light); padding: 1.5rem; }
.docs-sidebar h4 { font-family: 'JetBrains Mono', monospace; font-size: .63rem; letter-spacing: .2em; text-transform: uppercase; color: var(--gold-dim); margin-bottom: .8rem; padding-bottom: .5rem; border-bottom: 1px solid var(--border-light); }
.docs-sidebar ul { list-style: none; display: flex; flex-direction: column; gap: .2rem; margin-bottom: 1.5rem; }
.docs-sidebar a { display: block; padding: .35rem .6rem; font-family: 'JetBrains Mono', monospace; font-size: .68rem; color: var(--text-muted); letter-spacing: .04em; transition: color .2s, background .15s; border-radius: 2px; text-decoration: none; }
.docs-sidebar a:hover, .docs-sidebar a.active { color: var(--gold-light); background: rgba(201,168,76,.06); }
.toc-list { list-style: none; display: flex; flex-direction: column; }
.toc-item { padding: .65rem 0; border-bottom: 1px solid var(--border-light); display: flex; align-items: center; gap: 1rem; }
.toc-item:last-child { border-bottom: none; }
.toc-item a { display: flex; align-items: center; gap: 1rem; width: 100%; color: inherit; text-decoration: none; }
.toc-item a:hover .toc-title { color: var(--gold-light); }
.toc-num { font-family: 'JetBrains Mono', monospace; font-size: .63rem; color: var(--gold-dim); min-width: 28px; }
.toc-title { font-family: 'Cormorant Garamond', Georgia, serif; font-size: 1.05rem; color: var(--cream); flex: 1; }
.toc-sub { font-family: 'JetBrains Mono', monospace; font-size: .63rem; color: var(--text-muted); }

/* ── PLATFORM CARDS ── */
.platform-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1rem; margin: 1.5rem 0; }
.platform-card {
  background: var(--navy-mid); border: 1px solid var(--border-light);
  padding: 1.6rem; text-align: center; text-decoration: none; display: block;
  transition: border-color .2s, background .2s;
}
.platform-card:hover { border-color: var(--border); background: var(--navy-light); text-decoration: none; }
.platform-icon { font-size: 1.6rem; margin-bottom: .5rem; }
.platform-name { font-family: 'JetBrains Mono', monospace; font-size: .7rem; letter-spacing: .1em; color: var(--text-muted); text-transform: uppercase; }

/* ── FOOTER ── */
footer {
  position: relative; z-index: 1;
  background: rgba(22,32,64,.97); border-top: 1px solid var(--border);
  padding: 2.5rem 3rem; margin-top: 4rem;
}
.footer-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 1rem;
}
.footer-left p { font-family: 'JetBrains Mono', monospace; font-size: .68rem; color: rgba(255,255,255,0.6); }
.footer-left a { color: rgba(255,255,255,0.85); }
.footer-links { display: flex; gap: 1.5rem; list-style: none; }
.footer-links a { font-family: 'JetBrains Mono', monospace; font-size: .65rem; color: rgba(255,255,255,0.5); letter-spacing: .07em; text-transform: uppercase; transition: color .2s; text-decoration: none; }
.footer-links a:hover { color: rgba(255,255,255,0.9); }

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .card-grid   { grid-template-columns: 1fr 1fr; }
  .people-grid { grid-template-columns: 1fr 1fr; }
  .highlight-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .docs-layout { grid-template-columns: 1fr; }
  .docs-sidebar { position: static; }
  .container { padding: 3rem 2rem; }
  .announce  { padding: 1.2rem 2rem; }
  .highlight-inner { padding: 3rem 2rem; }
}
@media (max-width: 700px) {
  nav { padding: 0 1.2rem; }
  .nav-links { gap: 1rem; }
  .nav-links a { font-size: .7rem; }
  .container { padding: 2.5rem 1.2rem; }
  .card-grid, .card-grid-2 { grid-template-columns: 1fr; }
  .mission-grid { grid-template-columns: 1fr; }
  .people-grid  { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: 1fr; }
  .announce { flex-direction: column; gap: .8rem; padding: 1rem 1.2rem; }
  .paper-item { grid-template-columns: 1fr; }
  .workshop-item { flex-wrap: wrap; }
  .workshop-link { margin-left: 0; }
  footer { padding: 2rem 1.2rem; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}