:root {
  --ink: #0c0e12;
  --ink-2: #12151c;
  --ink-3: #1a1f2b;
  --line: #2a3142;
  --muted: #8b93a7;
  --paper: #e8ecf4;
  --amber: #e8a838;
  --teal: #3dd6c6;
  --danger: #e85d5d;
  --font-display: "Syne", sans-serif;
  --font-sans: "Manrope", sans-serif;
}

* { box-sizing: border-box; }
html, body, #app { min-height: 100%; margin: 0; }
body {
  font-family: var(--font-sans);
  color: var(--paper);
  background: var(--ink);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--amber); text-decoration: none; }
button, input, select, textarea { font: inherit; }
::selection { background: color-mix(in oklab, var(--amber) 40%, transparent); }

.shell { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.shell-main { padding: 28px 32px 48px; }
.sidebar {
  border-right: 1px solid var(--line);
  background: linear-gradient(180deg, var(--ink-2), var(--ink));
  padding: 24px 16px;
  display: flex; flex-direction: column; gap: 8px;
}
.brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
  margin: 0 8px 18px;
}
.brand span { color: var(--amber); }
.nav-link {
  display: block;
  padding: 10px 12px;
  color: var(--muted);
  border: 1px solid transparent;
}
.nav-link:hover, .nav-link.active {
  color: var(--paper);
  background: var(--ink-3);
  border-color: var(--line);
}
.credits {
  margin-top: auto;
  padding: 12px;
  border: 1px solid var(--line);
  background: var(--ink-3);
  font-size: 0.85rem;
  color: var(--muted);
}
.credits strong { color: var(--amber); }

.hero {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 48px 24px;
  background:
    radial-gradient(ellipse at top, color-mix(in oklab, var(--amber) 16%, transparent), transparent 55%),
    var(--ink);
}
.hero-inner { max-width: 720px; text-align: center; }
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  margin: 12px 0;
}
.eyebrow { text-transform: uppercase; letter-spacing: 0.18em; color: var(--teal); font-size: 0.8rem; }
.lead { color: var(--muted); font-size: 1.1rem; line-height: 1.6; margin: 0 auto 28px; max-width: 36rem; }
.btn-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid var(--line);
  background: var(--ink-3);
  color: var(--paper);
  padding: 10px 16px;
  cursor: pointer;
  transition: 0.15s ease;
}
.btn:hover { border-color: var(--amber); color: var(--amber); }
.btn-primary { background: var(--amber); color: #1a1205; border-color: var(--amber); font-weight: 700; }
.btn-primary:hover { filter: brightness(1.05); color: #1a1205; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-danger { border-color: var(--danger); color: var(--danger); }

.card {
  border: 1px solid var(--line);
  background: color-mix(in oklab, var(--ink-2) 90%, transparent);
  padding: 20px;
}
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { flex-direction: row; flex-wrap: wrap; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

h1, h2, h3 { font-family: var(--font-display); letter-spacing: -0.03em; }
h1 { font-size: 2rem; margin: 0 0 8px; }
h2 { font-size: 1.35rem; margin: 0 0 12px; }
.muted { color: var(--muted); }
.page-head { margin-bottom: 24px; }

.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--muted); }
.field input, .field select, .field textarea {
  background: var(--ink);
  border: 1px solid var(--line);
  color: var(--paper);
  padding: 10px 12px;
  outline: none;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--amber); }
.field textarea { min-height: 100px; resize: vertical; }

.auth-box {
  width: min(420px, 100%);
  margin: 10vh auto;
  padding: 28px;
  border: 1px solid var(--line);
  background: var(--ink-2);
}
.alert {
  border: 1px solid var(--danger);
  background: color-mix(in oklab, var(--danger) 12%, transparent);
  color: #ffd0d0;
  padding: 10px 12px;
  margin-bottom: 14px;
  font-size: 0.9rem;
}
.alert-ok {
  border-color: var(--teal);
  background: color-mix(in oklab, var(--teal) 12%, transparent);
  color: #c8fff8;
}
.badge {
  display: inline-block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 3px 8px;
  border: 1px solid var(--line);
  color: var(--muted);
}
.badge-live { border-color: var(--teal); color: var(--teal); }
.badge-demo { border-color: var(--amber); color: var(--amber); }

.steps { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.step {
  padding: 8px 12px;
  border: 1px solid var(--line);
  color: var(--muted);
  cursor: pointer;
  background: transparent;
}
.step.active { border-color: var(--amber); color: var(--amber); background: color-mix(in oklab, var(--amber) 10%, transparent); }
.scene {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 16px;
  border: 1px solid var(--line);
  padding: 12px;
  margin-bottom: 12px;
  background: var(--ink-2);
}
.scene img, .scene video {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  background: var(--ink);
}
.toolbar { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0 20px; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; }

@media (max-width: 700px) {
  .scene { grid-template-columns: 1fr; }
  .shell-main { padding: 20px 16px 40px; }
}