:root {
  --bg: #0b0e14;
  --bg-2: #10141c;
  --surface: #151b25;
  --surface-2: #1c2431;
  --border: rgba(255, 255, 255, 0.09);
  --text: #eef2f8;
  --muted: #94a0b1;
  --accent: #6d8bff;
  --accent-2: #a58bff;
  --ok: #36d07a;
  --warn: #f4b860;
  --bad: #ff6b7a;
  --radius: 14px;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: radial-gradient(1200px 600px at 80% -10%, rgba(109, 139, 255, 0.18), transparent 60%), var(--bg);
  color: var(--text);
  font: 16px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }
a:hover { color: #fff; }
code { font-family: var(--mono); font-size: 0.92em; background: rgba(255,255,255,0.06); padding: 0.1em 0.35em; border-radius: 6px; }
pre.code, pre {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.5;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  overflow-x: auto;
  white-space: pre;
  margin: 0 0 10px;
}
.skip { position: absolute; left: -999px; top: 8px; background: var(--accent); color: #fff; padding: 8px 12px; border-radius: 8px; }
.skip:focus { left: 8px; z-index: 10; }

.top {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 12px clamp(16px, 4vw, 40px);
  background: rgba(11, 14, 20, 0.85); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand { color: var(--text); text-decoration: none; font-weight: 700; letter-spacing: 0.2px; }
.top nav { display: flex; gap: 14px; flex-wrap: wrap; }
.top nav a { color: var(--muted); text-decoration: none; font-size: 14px; }
.top nav a:hover { color: var(--text); }

main { max-width: 1180px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 40px) 80px; }
.hero { padding: clamp(48px, 9vw, 110px) 0 32px; max-width: 820px; }
.eyebrow { color: var(--muted); font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; margin: 0 0 14px; }
h1 { font-size: clamp(32px, 5.2vw, 58px); line-height: 1.05; letter-spacing: -0.02em; margin: 0 0 22px; }
h1 em { font-style: normal; background: linear-gradient(135deg, var(--accent-2), var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lede { font-size: 18px; color: #c8d0dc; margin: 0 0 14px; max-width: 70ch; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px; }
.hero-status { min-height: 1.4em; color: var(--muted); font-size: 14px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 16px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); font: inherit; font-size: 15px; cursor: pointer; text-decoration: none;
}
.btn:hover { background: var(--surface-2); color: #fff; }
.btn.primary { background: linear-gradient(135deg, var(--accent-2), var(--accent)); border-color: transparent; color: #fff; font-weight: 600; }
.btn.primary:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.small { padding: 6px 10px; font-size: 13px; }

.band { padding: 40px 0 8px; border-top: 1px solid var(--border); margin-top: 32px; }
.band h2 { font-size: clamp(24px, 3vw, 32px); margin: 0 0 6px; letter-spacing: -0.01em; }
.band h3 { font-size: 18px; margin: 28px 0 8px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.grid { display: grid; gap: 14px; }
.grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); margin-top: 20px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.span2 { grid-column: span 2; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0; color: #c8d0dc; font-size: 14.5px; }

.split { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 22px; margin-top: 22px; align-items: start; }

/* interview */
.interview { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.steps { list-style: none; margin: 0; padding: 0; }
.step { display: none; }
.step.active { display: block; }
.step label { display: block; font-weight: 600; margin-bottom: 6px; }
.step .hint { color: var(--muted); font-size: 13.5px; margin: 0 0 10px; }
.step input[type="text"], .step textarea, .controls input[type="text"], .controls select, .fetch-row input {
  width: 100%; background: var(--bg-2); color: var(--text); border: 1px solid var(--border); border-radius: 10px;
  padding: 10px 12px; font: inherit; font-size: 15px;
}
.step textarea { min-height: 180px; font-family: var(--mono); font-size: 13px; line-height: 1.5; resize: vertical; }
.step input:focus, .step textarea:focus, .controls input:focus, .controls select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.step-nav { display: flex; gap: 10px; align-items: center; margin-top: 16px; }
.step-nav .small { margin-left: auto; }
.fetch-row { display: flex; gap: 8px; margin: 8px 0; }
.fetch-row input { flex: 1; }
.interview-result { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.result-head, .preview-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 8px; }
.result-head h3, .preview-head h3 { margin: 0; font-size: 16px; }
.pill { font-size: 12px; padding: 3px 9px; border-radius: 999px; border: 1px solid var(--border); background: var(--bg-2); color: var(--muted); white-space: nowrap; }
.pill.ok { color: var(--ok); border-color: rgba(54,208,122,0.4); }
.pill.bad { color: var(--bad); border-color: rgba(255,107,122,0.4); }
.errors { margin: 6px 0 10px; padding-left: 18px; color: var(--bad); font-size: 13.5px; }
.errors:empty { display: none; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
#brief-json { max-height: 380px; overflow: auto; white-space: pre-wrap; word-break: break-word; }

/* configurator */
.controls fieldset { border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px 14px; margin: 0 0 12px; background: var(--surface); }
.controls legend { padding: 0 6px; color: var(--muted); font-size: 13px; letter-spacing: 0.06em; text-transform: uppercase; }
.controls label { display: block; font-size: 13.5px; color: #c8d0dc; }
.controls label input, .controls label select { margin-top: 4px; }
.controls input[type="color"] { width: 100%; height: 38px; padding: 2px; border-radius: 10px; border: 1px solid var(--border); background: var(--bg-2); }
.controls input[type="range"] { width: calc(100% - 52px); vertical-align: middle; }
.controls output { display: inline-block; width: 44px; text-align: right; font-family: var(--mono); font-size: 12px; }
.controls label.check { display: flex; align-items: center; gap: 8px; }
.controls label.check input { width: auto; margin: 0; }
.presets { display: flex; flex-wrap: wrap; gap: 8px; }
.presets button { border: 1px solid var(--border); background: var(--bg-2); color: var(--text); border-radius: 999px; padding: 6px 12px; font: inherit; font-size: 13.5px; cursor: pointer; display: inline-flex; align-items: center; gap: 8px; }
.presets button[aria-checked="true"] { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(109,139,255,0.35); }
.presets .swatch { width: 14px; height: 14px; border-radius: 50%; border: 1px solid rgba(255,255,255,0.2); }
details.tokens { border: 1px solid var(--border); border-radius: 12px; background: var(--surface); padding: 10px 14px; }
details.tokens summary { cursor: pointer; font-weight: 600; }
.token-group { margin: 10px 0; }
.token-group h4 { margin: 8px 0 6px; font-size: 13px; color: var(--muted); letter-spacing: 0.06em; text-transform: uppercase; }
.token-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: 8px; align-items: center; padding: 3px 0; }
.token-row label { font-family: var(--mono); font-size: 12px; color: #c8d0dc; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.token-row input { width: 100%; background: var(--bg-2); color: var(--text); border: 1px solid var(--border); border-radius: 8px; padding: 6px 8px; font: 12px var(--mono); }
.token-row input.overridden { border-color: var(--accent); }

.preview-wrap { position: sticky; top: 64px; }
.preview-stage { background: var(--bg-2); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; min-height: 560px; background-image: radial-gradient(rgba(255,255,255,0.05) 1px, transparent 1px); background-size: 16px 16px; }
.preview-host { width: 100%; }

/* export */
.tabs { display: flex; gap: 6px; margin: 18px 0 10px; }
.tabs button { border: 1px solid var(--border); background: var(--surface); color: var(--muted); padding: 7px 12px; border-radius: 8px; font: inherit; font-size: 14px; cursor: pointer; }
.tabs button[aria-selected="true"] { color: var(--text); border-color: var(--accent); }
.tabpanel .btn { margin-top: 4px; }
#export-script, #export-brief, #export-react { white-space: pre; }

/* docs */
.subnav { display: flex; gap: 14px; flex-wrap: wrap; margin: 6px 0 10px; }
.subnav a { font-size: 14px; }
.tablewrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 10px; margin-bottom: 10px; }
table { border-collapse: collapse; width: 100%; font-size: 13.5px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 600; background: var(--bg-2); position: sticky; top: 0; }
td code { white-space: nowrap; }
td.val { font-family: var(--mono); font-size: 12px; max-width: 320px; word-break: break-word; }
.foot { border-top: 1px solid var(--border); padding: 24px clamp(16px, 4vw, 40px); color: var(--muted); font-size: 14px; }

@media (max-width: 960px) {
  .grid.four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .split { grid-template-columns: 1fr; }
  .preview-wrap { position: static; }
}
@media (max-width: 600px) {
  .grid.four, .grid.two { grid-template-columns: 1fr; }
  .span2 { grid-column: auto; }
  .top { flex-direction: column; align-items: flex-start; }
  .top nav { gap: 10px; }
  .preview-stage { min-height: 520px; padding: 8px; }
  .token-row { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }