/* curt playground — wears the curtlang.com fresh brand (ink + lime,
   editorial-technical). Tokens mirror site/assets/brand.css so the embedded
   /play/ is visually continuous with the marketing pages; still self-contained
   so it stands alone as a Hugging Face Space. */
:root {
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius: 10px;
  --radius-sm: 6px;
  --gap: 16px;
  --maxw: 1080px;

  --bg: #fbfbf8;
  --surface: #ffffff;
  --surface-2: #f3f3ee;
  --text: #14171a;
  --text-dim: #5d646c;
  --border: #e4e4da;
  --border-2: #d4d4c8;
  --accent: #88c70a;          /* graphic: button bg, marks, borders */
  --accent-strong: #4f7d06;   /* text on light */
  --accent-text: #0b0d10;     /* text on accent bg */
  --good: #4f7d06;
  --bad: #9a5b00;
  --code-bg: #f7f7f2;
  --shadow: 0 1px 2px rgba(0,0,0,.06), 0 12px 36px rgba(0,0,0,.06);
  --grid: rgba(0,0,0,.03);
}
[data-theme="dark"] {
  --bg: #0b0d10;
  --surface: #14181d;
  --surface-2: #191e24;
  --text: #eef1f4;
  --text-dim: #8a939d;
  --border: #232a31;
  --border-2: #2e373f;
  --accent: #b6f24a;
  --accent-strong: #c8f96e;
  --accent-text: #0b0d10;
  --good: #b6f24a;
  --bad: #f2a93f;
  --code-bg: #0f1216;
  --shadow: 0 1px 2px rgba(0,0,0,.5), 0 12px 40px rgba(0,0,0,.35);
  --grid: rgba(255,255,255,.035);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 48px 48px;
}

.topbar {
  max-width: var(--maxw); margin: 0 auto; padding: 22px var(--gap) 10px;
  display: flex; align-items: center; justify-content: space-between; gap: var(--gap);
}
.brand { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.logo {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-mono); font-weight: 700; font-size: 22px; color: var(--text); letter-spacing: -.04em;
}
.logo::before {
  content: ""; width: 13px; height: 17px; background: var(--accent); border-radius: 2px;
  display: inline-block; animation: blink 1.4s steps(2) infinite;
}
@keyframes blink { 50% { opacity: .25; } }
@media (prefers-reduced-motion: reduce) { .logo::before { animation: none; } }
.tagline { color: var(--text-dim); font-size: 13px; }

.theme-toggle {
  display: inline-flex; align-items: center; gap: 7px;
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border-2); border-radius: var(--radius-sm);
  padding: 6px 11px; cursor: pointer; font-size: 13px; font-family: var(--font-sans);
}
.theme-toggle:hover { border-color: var(--accent); }
.theme-toggle-icon { width: 9px; height: 9px; border-radius: 50%; background: var(--accent); display: inline-block; }

.tabs {
  max-width: var(--maxw); margin: 10px auto 0; padding: 0 var(--gap);
  display: flex; gap: 4px; border-bottom: 1px solid var(--border);
}
.tab {
  background: none; border: none; border-bottom: 2px solid transparent;
  color: var(--text-dim); padding: 10px 14px; cursor: pointer;
  font-family: var(--font-sans); font-size: 14px; margin-bottom: -1px;
}
.tab:hover { color: var(--text); }
.tab[aria-selected="true"] { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }

main { max-width: var(--maxw); margin: 0 auto; padding: var(--gap); }
.panel { animation: fade .15s ease; }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }

.run-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap); }
@media (max-width: 760px) { .run-grid { grid-template-columns: 1fr; } }

.row { display: flex; align-items: center; gap: 12px; margin-top: 10px; }
.row.between { justify-content: space-between; margin-top: 0; }
.label { font-size: 12px; text-transform: uppercase; letter-spacing: .1em; color: var(--text-dim); margin-bottom: 6px; }

.select {
  width: 100%; padding: 8px 10px; margin-bottom: 10px;
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border-2); border-radius: var(--radius-sm);
  font-family: var(--font-mono); font-size: 13px;
}
.editor {
  width: 100%; min-height: 280px; resize: vertical;
  background: var(--code-bg); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; font-family: var(--font-mono); font-size: 14px; line-height: 1.7; tab-size: 2;
  box-shadow: var(--shadow);
}
.editor:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.meter { display: flex; align-items: baseline; gap: 6px; }
.meter-num { font-family: var(--font-mono); font-size: 22px; font-weight: 750; color: var(--accent-strong); }
.meter-unit { font-size: 12px; color: var(--text-dim); }

.btn {
  background: var(--surface-2); color: var(--text); border: 1px solid var(--border-2);
  border-radius: var(--radius-sm); padding: 10px 18px; cursor: pointer;
  font-family: var(--font-mono); font-size: 14px; font-weight: 650;
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.btn.primary:hover { filter: brightness(1.06); }
.btn:disabled { opacity: .5; cursor: default; }
.hint { color: var(--text-dim); font-size: 12px; }

.output {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; min-height: 120px; margin: 0;
  font-family: var(--font-mono); font-size: 14px; white-space: pre-wrap; word-break: break-word;
}
.output.err { color: var(--bad); }
.err-label { margin-top: 12px; }

.blurb { color: var(--text-dim); max-width: 60ch; }
.vs-summary { display: flex; align-items: baseline; gap: 12px; margin: 8px 0 18px; flex-wrap: wrap; }
.vs-summary .big { font-family: var(--font-mono); font-size: 40px; font-weight: 750; color: var(--accent-strong); }
.vs-summary .big-label { color: var(--text-dim); font-size: 13px; }

.vs-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.vs-table th, .vs-table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
.vs-table th.num, .vs-table td.num { text-align: right; font-family: var(--font-mono); }
.vs-table th { font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--text-dim); font-weight: 600; }
.vs-table .ex-name { font-family: var(--font-mono); }
.vs-table tbody tr:hover { background: var(--surface-2); }
.num.good { color: var(--accent-strong); }
.num.bad { color: var(--bad); }

.gallery-stats { display: flex; gap: var(--gap); flex-wrap: wrap; margin: 12px 0 20px; }
.stat {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px 18px; box-shadow: var(--shadow); min-width: 140px;
}
.stat-num { display: block; font-family: var(--font-mono); font-size: 24px; font-weight: 750; color: var(--accent-strong); }
.stat-label { font-size: 12px; color: var(--text-dim); }

.gallery-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.sample {
  background: var(--surface); border: 1px solid var(--border); border-left-width: 3px;
  border-radius: var(--radius); padding: 11px 13px; box-shadow: var(--shadow);
}
.sample.pass { border-left-color: var(--accent); }
.sample.fail { border-left-color: var(--bad); }
.sample-head { margin-bottom: 6px; }
.badge { font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--text-dim); }
.sample.pass .badge { color: var(--accent-strong); }
.sample.fail .badge { color: var(--bad); }
.sample-code { margin: 0; font-family: var(--font-mono); font-size: 13px; white-space: pre-wrap; word-break: break-word; color: var(--text); }

.footer {
  max-width: var(--maxw); margin: 0 auto; padding: 18px var(--gap) 32px;
  color: var(--text-dim); font-size: 13px; font-family: var(--font-mono);
}
.footer a { color: var(--accent-strong); text-decoration: none; }
.footer a:hover { text-decoration: underline; text-underline-offset: 3px; }
.footer .sep { margin: 0 8px; color: var(--border-2); }