/* ============================================================================
   ThinkPing v1.1 — Design Tokens
   Reference: Beat 02 (Design System Primitives)
   ============================================================================ */

:root {
  /* --- PRIMITIVE COLORS --- */
  
  /* Cream (paper base) */
  --primitive-cream-100: #F8F2E4;
  --primitive-cream-200: #F3ECDD;
  --primitive-cream-300: #ECE3D0;
  --primitive-cream-400: #E4DAC3;
  --primitive-cream-500: #D9CEB8;
  
  /* Ink (text + deep tones) */
  --primitive-ink-100: #8A7D6F;
  --primitive-ink-200: #6B5E52;
  --primitive-ink-300: #4A3F36;
  --primitive-ink-400: #2B2520;
  --primitive-ink-500: #1A1510;
  
  /* Coral (accent) */
  --primitive-coral-100: #F5DFD8;
  --primitive-coral-200: #E5A899;
  --primitive-coral-300: #C65D48;
  --primitive-coral-400: #A84A38;
  --primitive-coral-500: #862E1F;
  
  /* Sage (success, positive) */
  --primitive-sage-200: #C9D4BC;
  --primitive-sage-300: #7A8471;
  --primitive-sage-400: #5A6353;
  
  /* --- SEMANTIC SURFACES --- */
  --surface-page: var(--primitive-cream-200);
  --surface-raised: var(--primitive-cream-300);
  --surface-sunk: var(--primitive-cream-100);
  --surface-inverse: var(--primitive-ink-400);
  
  /* --- SEMANTIC TEXT --- */
  --text-primary: var(--primitive-ink-400);
  --text-secondary: var(--primitive-ink-300);
  --text-muted: var(--primitive-ink-200);
  --text-placeholder: var(--primitive-ink-100);
  --text-inverse: var(--primitive-cream-200);
  --text-accent: var(--primitive-coral-300);
  
  /* --- SEMANTIC BORDERS --- */
  --border-default: var(--primitive-cream-500);
  --border-strong: var(--primitive-ink-400);
  --border-accent: var(--primitive-coral-300);
  --border-focus: var(--primitive-ink-400);
  
  /* --- SEMANTIC ACCENTS --- */
  --accent-primary: var(--primitive-coral-300);
  --accent-pressed: var(--primitive-coral-400);
  --accent-bg: var(--primitive-coral-100);
  
  /* --- STATE --- */
  --state-success: var(--primitive-sage-300);
  --state-error: var(--primitive-coral-500);
  --state-pending: var(--primitive-ink-200);
  
  /* --- SHADOWS --- */
  --shadow-sm: 0 2px 8px -2px rgba(43, 37, 32, 0.08);
  --shadow-md: 0 8px 24px -6px rgba(43, 37, 32, 0.15);
  --shadow-lg: 0 20px 50px -10px rgba(43, 37, 32, 0.25);
  --shadow-coral: 0 12px 40px -8px rgba(198, 93, 72, 0.45);
  
  /* --- TYPOGRAPHY FONTS --- */
  --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, Monaco, 'Courier New', monospace;
  
  /* --- TYPE SCALE --- */
  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1rem;     /* 16px */
  --text-lg: 1.125rem;   /* 18px */
  --text-xl: 1.25rem;    /* 20px */
  --text-2xl: 1.5rem;    /* 24px */
  --text-3xl: 1.875rem;  /* 30px */
  --text-4xl: 2.25rem;   /* 36px */
  --text-5xl: 3rem;      /* 48px */
  --text-6xl: 3.75rem;   /* 60px */
  
  /* --- LINE HEIGHTS --- */
  --leading-tight: 1.1;
  --leading-snug: 1.3;
  --leading-normal: 1.5;
  --leading-relaxed: 1.7;
  
  /* --- LETTER SPACING --- */
  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.04em;
  --tracking-wider: 0.08em;
  --tracking-widest: 0.15em;
  
  /* --- SPACING (4px baseline) --- */
  --space-0: 0;
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  
  /* --- RADII --- */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  
  /* --- Z-INDEX --- */
  --z-base: 0;
  --z-raised: 10;
  --z-sticky: 20;
  --z-overlay: 30;
  --z-modal: 40;
  --z-toast: 50;
  
  /* --- MOTION --- */
  --duration-instant: 100ms;
  --duration-fast: 180ms;
  --duration-base: 280ms;
  --duration-slow: 500ms;
  --duration-breath: 800ms;
  --duration-sunrise: 1800ms;
  
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.27, 1.55);
  --ease-tender: cubic-bezier(0.25, 0.1, 0.25, 1);
  
  /* --- TAP TARGET --- */
  --tap-min: 44px;
  --tap-button-size: 156px;
  --tap-button-size-lg: 180px;
}

/* Prefers reduced motion */
@media (prefers-reduced-motion: reduce) {
  :root {
    --duration-instant: 0ms;
    --duration-fast: 0ms;
    --duration-base: 0ms;
    --duration-slow: 0ms;
    --duration-breath: 0ms;
    --duration-sunrise: 0ms;
  }
}


/* ============================================================================
   DARK MODE (v1.2)
   ============================================================================ */
.dark-mode {
  --surface-page: #1A1A1A;
  --surface-card: #242424;
  --surface-elevated: #2E2E2E;
  --text-primary: #E8E2D8;
  --text-secondary: #B8B0A4;
  --text-muted: #7A7268;
  --border-default: #3A3630;
  --border-subtle: #2E2A26;
  --accent-primary: #C65D48;
  --shadow-coral: 0 8px 30px -6px rgba(198, 93, 72, 0.35);
  color-scheme: dark;
}

.dark-mode .app-header {
  background: var(--surface-page);
  border-bottom-color: var(--border-default);
}

.dark-mode .dashboard-footer {
  background: var(--surface-page);
  border-top-color: var(--border-default);
}

.dark-mode .tap-button {
  box-shadow: 0 8px 30px -6px rgba(198, 93, 72, 0.4);
}

.dark-mode .input {
  background: var(--surface-card);
  border-color: var(--border-default);
  color: var(--text-primary);
}

.dark-mode .btn-primary {
  background: var(--accent-primary);
}

.dark-mode .settings-section {
  background: var(--surface-card);
  border-color: var(--border-default);
}