:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --surface2: #eef0f3;
  --text: #16181b;
  --muted: #5d6470;
  --line: #dcdfe5;
  --accent: #b4532a;
  --accent-ink: #ffffff;
  --accent-soft: #f6e4da;
  --danger: #c4312b;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 4px 16px rgba(16, 24, 40, .05);
  --mono: ui-monospace, Menlo, Consolas, "DejaVu Sans Mono", "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #0f1115;
  --surface: #171a20;
  --surface2: #1f232b;
  --text: #e6e8eb;
  --muted: #9aa3af;
  --line: #2c313a;
  --accent: #f0a07a;
  --accent-ink: #0b0d10;
  --accent-soft: #3a2418;
  --danger: #ff7b72;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 20px rgba(0, 0, 0, .25);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }
code, .mono { font-family: var(--mono); }
.small { font-size: 13px; }
.muted { color: var(--muted); }
.hidden { display: none !important; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; padding: 0; margin: -1px; }
.grow { flex: 1 1 auto; }

/* header */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 20px; border-bottom: 1px solid var(--line); background: var(--surface);
  position: sticky; top: 0; z-index: 5;
}
.brand { display: flex; align-items: center; gap: 8px; min-width: 0; white-space: nowrap; }
.backlink { text-decoration: none; color: var(--muted); }
.backlink:hover { color: var(--text); }
.sep { color: var(--line); }
.topactions { display: flex; align-items: center; gap: 10px; }
.badge { font-size: 12px; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 2px 10px; }

/* buttons */
button { font: inherit; cursor: pointer; border-radius: 8px; border: 1px solid transparent; padding: 7px 12px; color: var(--text); background: none; }
button:disabled { opacity: .55; cursor: default; }
button:focus-visible, select:focus-visible, input:focus-visible, .dropzone:focus-visible, pre:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.primary { background: var(--accent); color: var(--accent-ink); font-weight: 600; }
.primary:hover:not(:disabled) { filter: brightness(1.07); }
.secondary { background: var(--surface2); border-color: var(--line); }
.secondary:hover:not(:disabled) { border-color: var(--muted); }
.ghost { border-color: var(--line); }
.ghost:hover:not(:disabled) { background: var(--surface2); }
.ghost.small { padding: 5px 10px; font-size: 13px; }
.iconbtn { width: 36px; height: 36px; padding: 0; font-size: 18px; line-height: 1; }

main { max-width: 1320px; margin: 0 auto; padding: 0 20px 40px; }
.hero { padding: 28px 0 18px; }
.hero h1 { font-size: clamp(26px, 3.4vw, 38px); line-height: 1.15; margin: 0 0 8px; letter-spacing: -.01em; }
.lede { margin: 0; color: var(--muted); max-width: 760px; font-size: 16px; }

/* workspace */
/* workspace */
.workspace { display: grid; grid-template-columns: 360px minmax(0, 1fr); gap: 22px; align-items: start; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); padding: 4px 0; }
.block { padding: 14px 16px; border-bottom: 1px solid var(--line); }
.block:last-child { border-bottom: 0; }
.block h2 { font-size: 13px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 0 0 10px; }
.row { display: flex; align-items: center; }
.gap { gap: 8px; }
.wrap { flex-wrap: wrap; }
.field { margin: 10px 0; }
.field label, .label { display: flex; justify-content: space-between; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
output { color: var(--text); font-variant-numeric: tabular-nums; }
input[type="search"], input[type="text"], select {
  font: inherit; width: 100%; min-width: 0; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--surface2); color: var(--text);
}
input[type="range"] { width: 100%; accent-color: var(--accent); }
input[type="checkbox"] { accent-color: var(--accent); }
.linkish { padding: 2px 0; border: 0; color: var(--accent); background: none; text-decoration: underline; text-underline-offset: 2px; }
.hint { margin: 6px 0 8px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.check { display: flex; align-items: center; gap: 6px; font-size: 14px; }

.results { list-style: none; margin: 8px 0 0; padding: 0; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.results li + li { border-top: 1px solid var(--line); }
.results button { display: flex; flex-direction: column; align-items: flex-start; width: 100%; text-align: left; border-radius: 0; padding: 8px 10px; gap: 2px; }
.results button:hover { background: var(--surface2); }

.examples { margin-top: 10px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.chip { border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px; font-size: 13px; background: var(--surface2); }
.chip:hover { border-color: var(--accent); }

.seg { display: flex; flex-wrap: wrap; gap: 4px; }
.seg button { border: 1px solid var(--line); padding: 5px 10px; font-size: 13px; border-radius: 999px; }
.seg button[aria-checked="true"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

.themes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; margin-bottom: 6px; }
.themeswatch { display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 8px 4px; border: 2px solid var(--line); border-radius: 10px; font-size: 12px; }
.themeswatch[aria-checked="true"] { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); }
.themeswatch .dots { display: flex; gap: 2px; }
.themeswatch i { width: 9px; height: 9px; border-radius: 50%; border: 1px solid rgba(127, 127, 127, .35); }

.layers { border: 0; padding: 0; margin: 10px 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px 8px; font-size: 13px; }
.layers legend { margin-bottom: 4px; }
.layers label { display: flex; align-items: center; gap: 5px; }
.colors summary { cursor: pointer; font-size: 13px; color: var(--muted); }
.colorgrid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin: 8px 0; font-size: 13px; }
.colorgrid label { display: flex; align-items: center; gap: 6px; }
.colorgrid input[type="color"] { width: 30px; height: 24px; padding: 0; border: 1px solid var(--line); border-radius: 6px; background: none; }

/* stage */
.stage { position: sticky; top: 72px; min-width: 0; }
.stage.drag .previewwrap { outline: 3px dashed var(--accent); outline-offset: 4px; }
.previewwrap { background: var(--surface2); border: 1px solid var(--line); border-radius: 14px; padding: clamp(10px, 3vw, 28px); display: flex; justify-content: center; }
.preview { width: 100%; max-width: min(620px, calc((100vh - 170px) * 0.707)); aspect-ratio: 210 / 297; background: var(--surface); box-shadow: 0 2px 6px rgba(0,0,0,.12), 0 12px 32px rgba(0,0,0,.14); touch-action: none; cursor: grab; overflow: hidden; display: flex; align-items: center; justify-content: center; }
.preview.dragging { cursor: grabbing; }
.preview svg { display: block; width: 100%; height: 100%; }
.preview .empty { display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 20px; text-align: center; }
.stats { margin: 8px 2px 0; }
.status { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; margin-bottom: 10px; }
.steps { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 6px; }
.step { font-size: 12px; padding: 2px 9px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); }
.step[data-state="run"] { border-color: var(--accent); color: var(--text); animation: pulse 1.2s ease-in-out infinite; }
.step[data-state="done"] { background: var(--accent-soft); color: var(--text); border-color: transparent; }
.step[data-state="done"]::before { content: "\2713  "; }
.step[data-state="warn"] { border-color: #c98a12; }
.step[data-state="fail"] { border-color: var(--danger); color: var(--danger); }
@keyframes pulse { 50% { opacity: .55; } }
@media (prefers-reduced-motion: reduce) { .step[data-state="run"] { animation: none; } }
.statusline { font-size: 14px; }
.notice { border-radius: 12px; padding: 10px 12px; margin-bottom: 10px; font-size: 14px; border: 1px solid var(--line); background: var(--surface); }
.notice p { margin: 0 0 6px; }
.notice p:last-child { margin: 0; }
.notice.warn { border-color: #c98a12; }
.notice.error { border-color: var(--danger); }
.notice.info { border-color: var(--accent); }
body.busy .preview { opacity: .75; }

.footer { max-width: 1320px; margin: 0 auto; padding: 18px 20px 40px; border-top: 1px solid var(--line); font-size: 14px; }
.footer p { margin: 4px 0; }

@media (max-width: 900px) {
  .workspace { grid-template-columns: 1fr; }
  .stage { position: static; order: -1; }
  .preview { max-width: 100%; }
  main { padding: 0 16px 32px; }
  .topbar { padding: 10px 16px; }
  .badge { display: none; }
}
@media (max-width: 420px) {
  .themes { grid-template-columns: repeat(2, 1fr); }
  .layers { grid-template-columns: repeat(2, 1fr); }
  .grid2 { grid-template-columns: 1fr; }
}