/* ===========================================================
   Chin-up Performance · Foundations
   colors + type tokens, semantic CSS variables, base elements
   =========================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* Brand CJK face — LiHei Pro (provided by user, fonts/LiHeiPro.ttf) */
@font-face {
  font-family: 'LiHei Pro';
  src: url('fonts/LiHeiPro.ttf') format('truetype');
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
}

:root {
  /* ---------- Brand (sky) ---------- */
  --brand-50:  #f0f9ff;
  --brand-100: #e0f2fe;
  --brand-500: #38bdf8;
  --brand-600: #0ea5e9;
  --brand-700: #0284c7;
  --brand-900: #0c4a6e;

  /* ---------- Surface / canvas ---------- */
  --surface:        #ffffff;
  --surface-raised: #ffffff;
  --canvas:         #f8faf9;

  /* ---------- Ink (text) ---------- */
  --ink:      #0f172a;
  --ink-soft: #475569;
  --ink-mute: #94a3b8;
  --line:     #e5e7eb;

  /* ---------- Semantic foreground / background ---------- */
  --fg-1: var(--ink);        /* primary text */
  --fg-2: var(--ink-soft);   /* secondary text, descriptions */
  --fg-3: var(--ink-mute);   /* tertiary text, hints */
  --fg-link: var(--brand-700);
  --fg-on-brand: #ffffff;

  --bg-1: var(--canvas);     /* page */
  --bg-2: var(--surface);    /* card */
  --bg-3: #f8faf9;           /* table header / hover row */
  --bg-brand-soft: var(--brand-50);

  /* ---------- Status (badges / states) ---------- */
  --ok-bg:  #ecfdf5;  --ok-fg:  #047857;  --ok-line:  #a7f3d0;
  --info-bg:#eff6ff;  --info-fg:#1d4ed8;  --info-line:#bfdbfe;
  --warn-bg:#fffbeb;  --warn-fg:#a16207;  --warn-line:#fcd34d;
  --err-bg: #fef2f2;  --err-fg: #b91c1c;  --err-line: #fecaca;
  --neutral-bg:#f1f5f9; --neutral-fg:#334155; --neutral-line:#cbd5e1;

  /* ---------- Logo accent palette (use ONLY inside logo / brand illustration) ---------- */
  --accent-pink:   #ee4f7e;
  --accent-orange: #ff8a3d;
  --accent-yellow: #ffc04a;
  --accent-green:  #6ed26a;
  --accent-cyan:   #34c8d8;
  --accent-blue:   #4f7cff;

  /* ---------- Shadows ---------- */
  --shadow-sm:    0 1px 2px 0 rgba(15, 23, 42, 0.04);
  --shadow:       0 4px 16px -4px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg:    0 12px 32px -8px rgba(15, 23, 42, 0.14);
  --shadow-brand: 0 6px 24px -6px rgba(56, 189, 248, 0.35);
  --ring-focus:   0 0 0 3px rgba(56, 189, 248, 0.15);

  /* ---------- Radii ---------- */
  --radius:      14px;
  --radius-sm:   10px;
  --radius-lg:   20px;
  --radius-pill: 9999px;

  /* ---------- Spacing (8pt loose) ---------- */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 56px;

  /* ---------- Type system ---------- */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'LiHei Pro',
               'PingFang TC', 'Microsoft JhengHei', sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
  --font-feat: 'cv02', 'cv03', 'cv04', 'cv11';

  /* size + leading */
  --fs-display: clamp(28px, 4vw, 42px);
  --fs-h1: 28px;
  --fs-h2: 20px;
  --fs-h3: 17px;
  --fs-body: 14px;
  --fs-small: 13px;
  --fs-xs: 12px;
  --fs-eyebrow: 12px;
  --fs-stat: 30px;

  --lh-tight: 1.1;
  --lh-snug: 1.35;
  --lh-body: 1.55;

  --tracking-tight: -0.03em;
  --tracking-base: -0.01em;
  --tracking-eyebrow: 0.12em;
  --tracking-label: 0.04em;
  --tracking-table: 0.06em;
}

/* ---------- Base elements ---------- */
html, body {
  font-family: var(--font-sans);
  font-feature-settings: var(--font-feat);
  letter-spacing: var(--tracking-base);
  background: var(--bg-1);
  color: var(--fg-1);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* page wash — two faint sky radials, fixed */
body.brand-canvas {
  background-image:
    radial-gradient(1200px 500px at -10% -20%, rgba(56, 189, 248, 0.08), transparent 60%),
    radial-gradient(800px 400px at 110% 10%, rgba(14, 165, 233, 0.05), transparent 55%);
  background-attachment: fixed;
}

h1 { font-size: var(--fs-display); font-weight: 800; line-height: var(--lh-tight); letter-spacing: var(--tracking-tight); }
h2 { font-size: var(--fs-h2);      font-weight: 700; letter-spacing: var(--tracking-base); }
h3 { font-size: var(--fs-h3);      font-weight: 700; letter-spacing: var(--tracking-base); }

p  { font-size: var(--fs-body); color: var(--fg-2); }
small, .text-small { font-size: var(--fs-small); color: var(--fg-2); }
.text-xs    { font-size: var(--fs-xs); color: var(--fg-3); }
.text-mute  { color: var(--fg-3); }
.text-soft  { color: var(--fg-2); }

/* eyebrow / label / stat */
.eyebrow {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: var(--fs-eyebrow); font-weight: 600;
  letter-spacing: var(--tracking-eyebrow); text-transform: uppercase;
  color: var(--brand-700);
  background: var(--brand-50);
  padding: 6px 12px; border-radius: var(--radius-pill);
  border: 1px solid rgba(56, 189, 248, 0.2);
}
.label-up {
  font-size: var(--fs-xs); font-weight: 600; color: var(--fg-2);
  letter-spacing: var(--tracking-label); text-transform: uppercase;
}
.stat {
  font-size: var(--fs-stat); font-weight: 800; letter-spacing: var(--tracking-tight);
  color: var(--fg-1); line-height: 1;
}

code, pre, .mono { font-family: var(--font-mono); font-size: 0.92em; }

::selection { background: var(--brand-100); color: var(--brand-900); }