:root {
  color-scheme: dark;
  --bg: #0b0f19;
  --surface: #111827;
  --raised: #161f30;
  --border: #1e293b;
  --text: #f8fafc;
  --muted: #94a3b8;
  --faint: #64748b;
  --accent: #e11d48;
  --gold: #eab308;
  --ok: #22c55e;
  --max: 1080px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: "Segoe UI", Helvetica, Arial, sans-serif; }
a { color: #fda4af; }
img { max-width: 100%; }

.wrap { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
.nav {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 16px 0; border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 800; }
.mark {
  width: 32px; height: 32px; border-radius: 8px; background: var(--accent);
  display: grid; place-items: center; color: white; font-weight: 800;
}
.nav-links { display: flex; gap: 16px; flex-wrap: wrap; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 14px; }
.nav-links a[aria-current="page"] { color: var(--text); }

.hero { padding: 56px 0 24px; }
.kicker { color: var(--accent); font-size: 12px; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; }
h1 { font-size: clamp(32px, 5vw, 52px); line-height: 1.05; margin: 8px 0 16px; }
.lede { color: var(--muted); font-size: 18px; line-height: 1.5; max-width: 68ch; }
.pills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.pill { border: 1px solid var(--border); border-radius: 999px; padding: 6px 12px; color: var(--muted); font-size: 13px; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; margin: 28px 0; }
.card, .panel { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 16px; }
.card h2, .panel h2 { margin: 0 0 8px; font-size: 18px; }
.card p, .panel p, .prose p, .prose li { color: var(--muted); line-height: 1.55; }
.locked { opacity: 0.55; }

.personas { display: flex; flex-wrap: wrap; gap: 8px; }
.persona, .mode, button.primary, button.ghost {
  border-radius: 999px; border: 1px solid var(--border); background: transparent; color: var(--text);
  padding: 8px 12px; cursor: pointer; font: inherit;
}
.persona[aria-pressed="true"], .mode[aria-pressed="true"] { border-color: var(--accent); background: rgba(225, 29, 72, 0.15); }
button.primary { background: var(--accent); border-color: var(--accent); font-weight: 700; }
button.ghost { color: var(--muted); }
button:disabled { opacity: 0.45; cursor: not-allowed; }

.composer { display: flex; gap: 8px; margin-top: 12px; }
.composer input, .field input {
  flex: 1; background: var(--raised); color: var(--text); border: 1px solid var(--border);
  border-radius: 12px; padding: 12px; font: inherit;
}
.thread { display: flex; flex-direction: column; gap: 8px; min-height: 120px; margin-top: 12px; }
.bubble { border-radius: 12px; padding: 10px 12px; line-height: 1.45; }
.bubble.user { align-self: flex-end; background: var(--raised); max-width: 80%; }
.bubble.bot { align-self: flex-start; border-left: 3px solid var(--accent); background: #0e1422; max-width: 90%; }
.note { color: var(--faint); font-size: 12px; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--border); font-size: 14px; }
th { color: var(--faint); font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
.gold { color: var(--gold); }

.modal {
  position: fixed; inset: 0; background: rgba(2, 6, 23, 0.78);
  display: none; align-items: center; justify-content: center; padding: 16px;
}
.modal.open { display: flex; }
.modal .panel { max-width: 460px; }

.prose { padding: 32px 0 64px; }
.prose h1 { font-size: 36px; }
.prose h2 { margin-top: 28px; font-size: 20px; }
footer { border-top: 1px solid var(--border); padding: 24px 0 40px; color: var(--faint); font-size: 13px; }