/* ============================================
   SBTI Design System — Tokens
   Light & Bright Theme
   ============================================ */

:root {
  /* === Colors — Light Premium Theme === */
  --bg-primary: #f5f3ef;
  --bg-secondary: #ebe8e2;
  --bg-card: #ffffff;
  --bg-card-hover: #f9f8f6;
  --bg-elevated: #e8e5de;

  --text-primary: #1a1a1e;
  --text-secondary: #4a4a55;
  --text-muted: #8a8a95;
  --text-accent: #2d7d5f;

  --accent: #2d7d5f;
  --accent-hover: #236b50;
  --accent-subtle: rgba(45, 125, 95, 0.08);
  --accent-glow: rgba(45, 125, 95, 0.15);

  --accent-dark: #1f5c44;
  --accent-light: #e7f5ee;

  --border: rgba(0, 0, 0, 0.07);
  --border-hover: rgba(0, 0, 0, 0.12);
  --border-active: rgba(45, 125, 95, 0.35);

  --success: #2d7d5f;
  --warning: #d4a017;
  --danger: #c75050;

  /* === Typography === */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Outfit', var(--font-sans);
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3.5rem;
  --text-hero: clamp(2.5rem, 6vw, 4.5rem);

  --leading-tight: 1.1;
  --leading-snug: 1.3;
  --leading-normal: 1.6;
  --leading-relaxed: 1.8;

  --tracking-tight: -0.03em;
  --tracking-normal: 0;
  --tracking-wide: 0.05em;
  --tracking-wider: 0.1em;

  /* === Spacing === */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 24px;
  --space-2xl: 32px;
  --space-3xl: 48px;
  --space-4xl: 64px;
  --space-5xl: 96px;

  /* === Radius === */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-full: 999px;

  /* === Shadows === */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 28px rgba(0, 0, 0, 0.08);
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.04), 0 0 0 1px var(--border);

  /* === Transitions === */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 0.15s;
  --duration-normal: 0.25s;
  --duration-slow: 0.4s;

  /* === Z-index === */
  --z-base: 1;
  --z-dropdown: 10;
  --z-sticky: 50;
  --z-modal: 100;
  --z-toast: 1000;

  /* === Layout === */
  --max-width: 680px;
  --max-width-wide: 1080px;
  --navbar-height: 60px;
}