:root {
  --bg: #0b0d14;
  --panel: rgba(15, 18, 28, 0.82);
  --panel-2: rgba(18, 22, 35, 0.92);
  --line: rgba(255,255,255,0.08);
  --text: #eff2ff;
  --muted: #a8b0d0;
  --accent: #8b5cf6;
  --accent-2: #22d3ee;
  --shadow: 0 20px 60px rgba(0,0,0,.35);
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(139,92,246,.25), transparent 35%),
    radial-gradient(circle at 80% 20%, rgba(34,211,238,.14), transparent 25%),
    var(--bg);
}
.app-shell { max-width: 1200px; margin: 0 auto; padding: 32px 20px 150px; }
.hero { margin-bottom: 20px; }
.brand { color: var(--accent-2); text-transform: uppercase; letter-spacing: .3em; font-size: 12px; }
h1 { margin: 8px 0 6px; font-size: clamp(40px, 7vw, 76px); line-height: .9; }
.hero p { margin: 0; color: var(--muted); max-width: 760px; }
.panel {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}
.search-panel { padding: 18px; margin-bottom: 18px; }
label { display: block; margin-bottom: 10px; color: var(--muted); font-size: 14px; }
.search-wrap, .composer-row { display: flex; gap: 12px; }
input, textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.04);
  color: var(--text);
  border-radius: 16px;
  padding: 14px 16px;
  font: inherit;
  outline: none;
}
textarea { resize: vertical; min-height: 56px; }
button {
  border: 0;
  border-radius: 16px;
  padding: 14px 18px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  font-weight: 700;
  cursor: pointer;
}
button:hover { filter: brightness(1.05); }
.suggestions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.chip {
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.04);
  color: var(--muted);
  cursor: pointer;
}
.grid { display: grid; grid-template-columns: 1.7fr 1fr; gap: 18px; }
.preview, .stack, .composer { padding: 18px; }
.panel-head { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .14em; font-size: 11px; margin-bottom: 14px; }
.page-preview {
  min-height: 360px;
  padding: 24px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02));
}
.page-preview h2 { margin: 0 0 10px; font-size: 32px; }
.page-preview p { color: var(--muted); line-height: 1.6; }
.history { display: grid; gap: 12px; }
.card {
  padding: 14px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.04);
}
.card strong { display: block; margin-bottom: 6px; }
.card small { color: var(--muted); line-height: 1.5; }
.composer {
  position: fixed;
  left: 20px; right: 20px; bottom: 20px;
  max-width: 1200px;
  margin: 0 auto;
}
@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr; }
  .composer-row, .search-wrap { flex-direction: column; }
  .composer { left: 12px; right: 12px; bottom: 12px; }
}