/* ═══════════════════════════════════════════════════
   SMMT Design Tokens — Dual Theme
   C296 — SM 2026-02-24
   ═══════════════════════════════════════════════════ */

:root {
    color-scheme: light dark;

    /* ── Surfaces ── */
    --bg-page:      light-dark(#f8fafc, #0f172a);
    --bg-card:      light-dark(#ffffff, #1e293b);
    --bg-sidebar:   light-dark(#f1f5f9, #1e293b);
    --bg-elevated:  light-dark(#ffffff, #1e293b);
    --glass-bg:     light-dark(rgba(255,255,255,0.85), rgba(30,41,59,0.8));
    --glass-border: light-dark(rgba(226,232,240,0.6), rgba(51,65,85,0.6));
    --glass-blur:   12px;

    /* ── Text ── */
    --text-primary:    light-dark(#0f172a, #f1f5f9);
    --text-secondary:  light-dark(#475569, #cbd5e1);
    --text-muted:      light-dark(#94a3b8, #64748b);
    --text-on-primary: #ffffff;

    /* ── Primary (teal) ── */
    --primary:        light-dark(#0d9488, #2dd4bf);
    --primary-hover:  light-dark(#0f766e, #5eead4);
    --primary-subtle: light-dark(rgba(13,148,136,0.1), rgba(45,212,191,0.1));

    /* ── Semantic ── */
    --info:    light-dark(#2563eb, #60a5fa);
    --success: light-dark(#16a34a, #4ade80);
    --warning: light-dark(#d97706, #fbbf24);
    --danger:  light-dark(#dc2626, #f87171);
    --purple:  light-dark(#7c3aed, #a78bfa);

    /* ── Borders ── */
    --border:       light-dark(#e2e8f0, #334155);
    --border-muted: light-dark(rgba(226,232,240,0.5), rgba(51,65,85,0.3));

    /* ── Shadows ── */
    --shadow-sm: light-dark(0 1px 2px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.3));
    --shadow-md: light-dark(0 4px 12px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.4));
    --shadow-glow-primary: light-dark(0 0 12px rgba(13,148,136,0.2), 0 0 12px rgba(45,212,191,0.3));

    /* ── Brand ── */
    --brand: light-dark(#0d9488, #2dd4bf);

    /* ── Spacing (theme-independent) ── */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-8: 32px;

    /* ── Typography (theme-independent) ── */
    --text-xs: 12px;
    --text-sm: 14px;
    --text-lg: 18px;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;

    /* ── Transition ── */
    --transition-fast: 0.15s ease;
}

[data-theme="light"] { color-scheme: light; }
[data-theme="dark"]  { color-scheme: dark; }

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-page);
    color: var(--text-primary);
    min-height: 100vh;
    transition: background 0.2s ease, color 0.2s ease;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }