/* ── Reset & base ──────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:          #0b0d0f;
  --bg-elevated: #111418;
  --bg-card:     #141820;
  --bg-card-hover: #1a2030;
  --border:      rgba(255, 255, 255, 0.07);
  --border-hover: rgba(255, 255, 255, 0.14);
  --text-primary: #e8eaf0;
  --text-secondary: #8892a4;
  --text-muted:  #4b5568;
  --accent:      #4f8ef7;
  --accent-glow: rgba(79, 142, 247, 0.15);
  --accent-dim:  rgba(79, 142, 247, 0.6);
  --soon-bg:     rgba(255, 255, 255, 0.04);
  --soon-text:   #4b5568;
  --soon-border: rgba(255, 255, 255, 0.04);
  --radius:      12px;
  --radius-sm:   7px;
  --font:        'Inter', system-ui, sans-serif;
  --font-mono:   'JetBrains Mono', 'Fira Code', monospace;
}

html { font-size: 16px; }

body {
  font-family: var(--font);
  background-color: var(--bg);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* ── Static background grid ────────────────────────────────── */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 140% 120% at 50% 50%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 140% 120% at 50% 50%, black 40%, transparent 100%);
  pointer-events: none;
}

/* ── Background canvas ─────────────────────────────────────── */
#bg-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 140% 120% at 50% 50%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 140% 120% at 50% 50%, black 40%, transparent 100%);
}

/* ── Header ────────────────────────────────────────────────── */
header {
  position: relative;
  z-index: 10;
  border-bottom: 1px solid var(--border);
  background: rgba(11, 13, 15, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

.logo-mark {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.01em;
  line-height: 1;
}

.logo-wordmark {
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--text-muted);
  padding-left: 0.5rem;
  border-left: 1px solid var(--border);
  line-height: 1;
  font-family: var(--font);
  letter-spacing: 0.01em;
}

.cluster-badge {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 6px rgba(52, 211, 153, 0.6);
  flex-shrink: 0;
}

/* ── Main ──────────────────────────────────────────────────── */
main {
  position: relative;
  z-index: 1;
  flex: 1;
  max-width: 1000px;
  width: 100%;
  margin: 0 auto;
  padding: 5rem 2rem 4rem;
}

/* ── Hero ──────────────────────────────────────────────────── */
.hero {
  margin-bottom: 4rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
  background: linear-gradient(135deg, #e8eaf0 0%, #8892a4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}

.tagline {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 480px;
  font-weight: 400;
  line-height: 1.7;
}

/* ── Section label ─────────────────────────────────────────── */
.section-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

/* ── Cards ─────────────────────────────────────────────────── */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.card {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.4rem 1.4rem 1.4rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: background 0.2s, border-color 0.2s, box-shadow 0.2s, transform 0.15s;
  cursor: pointer;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--accent-glow) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

a.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  box-shadow: 0 0 0 1px rgba(79, 142, 247, 0.15), 0 8px 32px rgba(0, 0, 0, 0.4);
  transform: translateY(-2px);
}

a.card:hover::before {
  opacity: 1;
}

a.card:active {
  transform: translateY(0);
}

.card--soon {
  background: var(--soon-bg);
  border-color: var(--soon-border);
  cursor: default;
}

.card--soon .card-body h3,
.card--soon .card-body p,
.card--soon .card-icon {
  color: var(--text-muted);
  opacity: 0.5;
}

/* ── Card icon ─────────────────────────────────────────────── */
.card-icon {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-glow);
  border: 1px solid rgba(79, 142, 247, 0.2);
  border-radius: var(--radius-sm);
  margin-top: 1px;
  transition: color 0.2s;
}

.card-icon svg {
  width: 18px;
  height: 18px;
}

/* ── Card body ─────────────────────────────────────────────── */
.card-body {
  flex: 1;
  min-width: 0;
}

.card-body h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.3rem;
  letter-spacing: -0.01em;
}

.card-body p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ── Card arrow ────────────────────────────────────────────── */
.card-arrow {
  flex-shrink: 0;
  color: var(--text-muted);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.2s, transform 0.2s, color 0.2s;
  align-self: center;
}

.card-arrow svg {
  width: 16px;
  height: 16px;
  display: block;
}

a.card:hover .card-arrow {
  opacity: 1;
  transform: translateX(0);
  color: var(--accent-dim);
}

/* ── Soon badge ────────────────────────────────────────────── */
.soon-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
}

/* ── Footer ────────────────────────────────────────────────── */
footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 2rem 2rem 1.5rem;
}

.footer-inner {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.footer-top {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.footer-logos {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  flex-wrap: wrap;
}

.footer-logo-link {
  display: flex;
  align-items: center;
  opacity: 0.55;
  transition: opacity 0.2s;
}

.footer-logo-link:hover {
  opacity: 0.9;
}

.footer-logo {
  display: block;
  object-fit: contain;
}

.footer-logo--atlas {
  height: 75px;
  width: auto;
}

.footer-logo--usatlas {
  height: 75px;
  width: auto;
}

.footer-logo--uchicago {
  height: 75px;
  width: auto;
}

.footer-logo--iu {
  height: 75px;
  width: auto;
}

.footer-bottom {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.footer-sep {
  color: var(--border);
}

footer a {
  color: var(--text-muted);
  transition: color 0.15s;
}

footer a:hover {
  color: var(--text-secondary);
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 600px) {
  main {
    padding: 3rem 1.25rem 3rem;
  }

  .header-inner {
    padding: 0 1.25rem;
  }

  .cards {
    grid-template-columns: 1fr;
  }

  footer {
    padding: 1.5rem 1.25rem;
  }

  .footer-top {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .footer-logos {
    gap: 1.25rem;
  }
}