/* Technyder design tokens — LIGHT theme.
   Dark variant preserved as tokens-dark.css. Swap the link in <head> to flip. */

:root {
  /* Surface — warm off-white, near-paper */
  --surface-base: #FAFAF7;
  --surface-card: #FFFFFF;
  --surface-card-2: #F4F4F0;
  --surface-card-raised: #FFFFFF;
  --surface-border: #E4E4DE;
  --surface-border-soft: #EFEFEA;

  /* Text */
  --text-primary: #0E1116;
  --text-secondary: #3A414B;
  --text-muted: #6B7280;
  --text-faint: #9CA0A8;

  /* Accent — Technyder green, tuned darker for AA contrast on light surface */
  --accent: #00A552;
  --accent-strong: #008A44;
  --accent-dim: #BDE8CF;
  --accent-tint: rgba(0, 165, 82, 0.08);
  --accent-tint-strong: rgba(0, 165, 82, 0.14);
  --accent-border: rgba(0, 165, 82, 0.32);

  /* Signal */
  --signal-amber: #B07A12;
  --signal-amber-tint: rgba(176, 122, 18, 0.10);
  --signal-red: #C2453F;
  --signal-red-tint: rgba(194, 69, 63, 0.08);

  /* Type scale */
  --t-xs: 12px;
  --t-sm: 14px;
  --t-base: 16px;
  --t-md: 20px;
  --t-lg: 28px;
  --t-xl: 44px;
  --t-2xl: 64px;

  /* Spacing (4px base) */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 20px;
  --s-6: 24px;
  --s-8: 32px;
  --s-10: 40px;
  --s-12: 48px;
  --s-16: 64px;
  --s-20: 80px;
  --s-32: 128px;

  /* Radius */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;

  /* Motion */
  --ease: cubic-bezier(0.2, 0, 0, 1);
  --dur: 150ms;

  /* Shadows — restrained, layered */
  --shadow-card: 0 1px 0 0 rgba(14, 17, 22, 0.03), 0 0 0 1px var(--surface-border);
  --shadow-raised: 0 8px 24px -12px rgba(14, 17, 22, 0.10), 0 2px 6px -2px rgba(14, 17, 22, 0.06);
}

@media (prefers-reduced-motion: reduce) {
  :root { --dur: 0ms; }
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  background: var(--surface-base);
  color: var(--text-primary);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-feature-settings: 'cv11', 'ss01', 'ss03';
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body { font-size: var(--t-base); line-height: 1.5; }

.tnum { font-variant-numeric: tabular-nums; font-feature-settings: 'tnum' 1; }
.mono { font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace; }

::selection { background: var(--accent); color: #FFFFFF; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: inherit; font-size: 14px; font-weight: 500;
  padding: 10px 16px; border-radius: var(--r-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
  text-decoration: none; white-space: nowrap;
}
.btn-primary {
  background: var(--accent); color: #FFFFFF; border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); }
.btn-ghost {
  background: var(--surface-card); color: var(--text-primary); border-color: var(--surface-border);
}
.btn-ghost:hover { border-color: #C9C9C0; background: var(--surface-card-2); }
.btn-dark {
  background: var(--text-primary); color: var(--surface-card); border-color: var(--text-primary);
}
.btn-dark:hover { background: #000; border-color: #000; }
.btn-text {
  background: transparent; color: var(--text-secondary); border-color: transparent; padding: 10px 0;
}
.btn-text:hover { color: var(--text-primary); }

/* Score chip vocabulary */
.chip {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-variant-numeric: tabular-nums;
  font-size: 12px; font-weight: 600;
  padding: 3px 8px; border-radius: 6px;
  border: 1px solid;
  line-height: 1;
}
.chip-hi { color: var(--accent-strong); border-color: var(--accent-border); background: var(--accent-tint); }
.chip-mid { color: var(--signal-amber); border-color: rgba(176, 122, 18, 0.30); background: var(--signal-amber-tint); }
.chip-lo { color: var(--text-muted); border-color: var(--surface-border); background: var(--surface-card-2); }
.chip-kill { color: var(--signal-red); border-color: rgba(194, 69, 63, 0.32); background: var(--signal-red-tint); }
