/* Share Hub — system shell (Apple-like) */
:root {
  --bg: #000;
  --elevated: #1c1c1e;
  --card: rgba(28, 28, 30, 0.88);
  --label: #f5f5f7;
  --secondary: #a1a1a6;
  --tertiary: #6e6e73;
  --accent: #0a84ff;
  --gold: #ffd60a;
  --separator: rgba(84, 84, 88, 0.45);
  --radius: 18px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(ellipse 90% 50% at 50% -20%, rgba(10, 132, 255, 0.18), transparent 55%),
    radial-gradient(ellipse 50% 40% at 100% 0%, rgba(255, 214, 10, 0.06), transparent 40%),
    var(--bg);
  color: var(--label);
  font-family: var(--font);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 28px 22px 64px; }

.hero {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px 24px;
  margin-bottom: 28px;
}
.eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}
.hero h1 {
  margin: 0;
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.1;
}
.hero p {
  margin: 10px 0 0;
  color: var(--secondary);
  font-size: 15px;
  line-height: 1.5;
  max-width: 42ch;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  border-radius: 980px;
  font-size: 14px;
  font-weight: 600;
  border: 0;
  cursor: pointer;
  text-decoration: none;
  background: rgba(120, 120, 128, 0.28);
  color: var(--label);
}
.btn:hover { text-decoration: none; filter: brightness(1.06); }
.btn.primary { background: var(--accent); color: #fff; }
.btn.ghost { background: transparent; border: 0.5px solid var(--separator); }

.section-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--tertiary);
  margin: 8px 0 14px;
}

.session-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.session-card {
  border-radius: var(--radius);
  background: var(--card);
  border: 0.5px solid var(--separator);
  padding: 20px 20px 18px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.session-card:hover {
  border-color: rgba(10, 132, 255, 0.45);
  transform: translateY(-1px);
}
.sc-top {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 10px;
}
.pill {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 9px;
  border-radius: 980px;
  background: rgba(10, 132, 255, 0.16);
  color: #64b5ff;
}
.pill.seed { background: rgba(255, 214, 10, 0.14); color: var(--gold); }
.date { color: var(--tertiary); font-size: 12px; letter-spacing: 0.04em; }
.session-card h2 {
  margin: 0 0 6px;
  font-size: 22px;
  font-weight: 650;
  letter-spacing: -0.025em;
}
.deck-title { color: var(--accent); font-size: 14px; font-weight: 600; margin: 0 0 8px; }
.blurb { color: var(--secondary); font-size: 14px; line-height: 1.5; margin: 0 0 16px; max-width: 60ch; }
.sc-links { display: flex; flex-wrap: wrap; gap: 8px; }

.how-card {
  margin-top: 28px;
  border-radius: var(--radius);
  border: 0.5px solid var(--separator);
  background: rgba(28, 28, 30, 0.55);
  padding: 18px 20px;
}
.how-card h3 {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 650;
  letter-spacing: -0.02em;
}
.how-card ol {
  margin: 0;
  padding-left: 18px;
  color: var(--secondary);
  font-size: 14px;
  line-height: 1.55;
}
.how-card li { margin-bottom: 6px; }
.how-card code {
  font-size: 12px;
  background: rgba(120, 120, 128, 0.24);
  padding: 1px 6px;
  border-radius: 6px;
}

footer.site {
  margin-top: 36px;
  padding-top: 16px;
  border-top: 0.5px solid var(--separator);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: space-between;
  color: var(--tertiary);
  font-size: 12px;
}

/* compact orbit stage optional */
.stage-mini {
  border-radius: calc(var(--radius) + 4px);
  border: 0.5px solid var(--separator);
  background: linear-gradient(180deg, #121214, #0a0a0b);
  min-height: 200px;
  margin-bottom: 22px;
  overflow: hidden;
  position: relative;
}
#orbit-canvas { width: 100%; height: 220px; display: block; cursor: grab; }
#orbit-status {
  position: absolute;
  left: 12px; bottom: 10px;
  font-size: 11px;
  color: var(--tertiary);
  pointer-events: none;
}