/**
 * Recur Theme System
 *
 * Design tokens only — all component styles live in styles.css.
 * Dark Mode: Electric Violet + Vivid Cyan on Zinc-950
 * Light Mode: Frost-glass white with violet accents
 */

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */

:root {
  /* Base timing */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;

  /* Typography */
  --font-family-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Spacing scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows - will be themed */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
}

/* ============================================
   DARK MODE (Default) - Electric Violet + Cyan
   ============================================ */

[data-theme="dark"],
:root {
  color-scheme: dark;

  /* Primary palette - Electric Violet */
  --color-primary-50: #f5f3ff;
  --color-primary-100: #ede9fe;
  --color-primary-200: #ddd6fe;
  --color-primary-300: #c4b5fd;
  --color-primary-400: #a78bfa;
  --color-primary-500: #8b5cf6;
  --color-primary-600: #7c3aed;
  --color-primary-700: #6d28d9;
  --color-primary-800: #5b21b6;
  --color-primary-900: #4c1d95;

  /* Accent - Vivid Cyan */
  --color-accent-50: #ecfeff;
  --color-accent-100: #cffafe;
  --color-accent-200: #a5f3fc;
  --color-accent-300: #67e8f9;
  --color-accent-400: #22d3ee;
  --color-accent-500: #06b6d4;
  --color-accent-600: #0891b2;
  --color-accent-700: #0e7490;
  --color-accent-800: #155e75;
  --color-accent-900: #164e63;

  /* Semantic colors */
  --color-success-500: #10b981;
  --color-success-600: #059669;
  --color-warning-500: #f59e0b;
  --color-warning-600: #d97706;
  --color-error-500: #ef4444;
  --color-error-600: #dc2626;
  --color-info-500: #3b82f6;
  --color-info-600: #2563eb;

  /* Background layers - Zinc scale */
  --bg-base: #09090b;
  --bg-surface: #18181b;
  --bg-elevated: #27272a;
  --bg-tertiary: #1f1f23;
  --bg-overlay: #3f3f46;
  --bg-hover: #3f3f46;
  --bg-active: #52525b;

  /* Text colors */
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-tertiary: #71717a;
  --text-muted: #52525b;
  --text-inverse: #09090b;

  /* Border colors */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-default: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.16);
  --border-focus: var(--color-primary-400);

  /* Interactive states */
  --interactive-normal: var(--color-primary-500);
  --interactive-hover: var(--color-primary-400);
  --interactive-active: var(--color-primary-300);

  /* Component-specific */
  --card-bg: var(--bg-surface);
  --card-border: var(--border-subtle);
  --input-bg: var(--bg-elevated);
  --input-border: var(--border-default);
  --button-primary-bg: var(--color-primary-600);
  --button-primary-hover: var(--color-primary-500);
  --button-primary-text: white;
  --button-secondary-bg: transparent;
  --button-secondary-border: var(--border-default);
  --button-secondary-text: var(--text-primary);

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #7c3aed, #06b6d4);
  --gradient-primary-hover: linear-gradient(135deg, #8b5cf6, #22d3ee);

  /* Glass */
  --glass-bg: rgba(24, 24, 27, 0.8);
  --glass-border: rgba(255, 255, 255, 0.08);

  /* Shadows for dark mode */
  --shadow-color: 0deg 0% 0%;
  --shadow-sm: 0 1px 2px hsl(var(--shadow-color) / 0.4);
  --shadow-md: 0 4px 6px hsl(var(--shadow-color) / 0.5);
  --shadow-lg: 0 10px 15px hsl(var(--shadow-color) / 0.6);
  --shadow-glow: 0 0 20px rgba(139, 92, 246, 0.4);

  /* Scrollbar */
  --scrollbar-track: var(--bg-surface);
  --scrollbar-thumb: var(--border-default);
  --scrollbar-thumb-hover: var(--border-strong);

  /* Code/syntax */
  --code-bg: var(--bg-elevated);
  --code-border: var(--border-subtle);
  --code-text: #e2e8f0;

  /* Status badges */
  --badge-success-bg: rgba(16, 185, 129, 0.15);
  --badge-success-text: #34d399;
  --badge-warning-bg: rgba(245, 158, 11, 0.15);
  --badge-warning-text: #fbbf24;
  --badge-error-bg: rgba(239, 68, 68, 0.15);
  --badge-error-text: #f87171;
  --badge-info-bg: rgba(59, 130, 246, 0.15);
  --badge-info-text: #60a5fa;

  /* Charts/data viz */
  --chart-1: var(--color-primary-400);
  --chart-2: var(--color-accent-500);
  --chart-3: var(--color-success-500);
  --chart-4: var(--color-info-500);
  --chart-5: #a78bfa;
}

/* ============================================
   LIGHT MODE - Frost Glass with Violet Accents
   ============================================ */

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

  /* Primary palette - Violet (same hue, adjusted for light bg) */
  --color-primary-50: #f5f3ff;
  --color-primary-100: #ede9fe;
  --color-primary-200: #ddd6fe;
  --color-primary-300: #c4b5fd;
  --color-primary-400: #a78bfa;
  --color-primary-500: #8b5cf6;
  --color-primary-600: #7c3aed;
  --color-primary-700: #6d28d9;
  --color-primary-800: #5b21b6;
  --color-primary-900: #4c1d95;

  /* Accent - Cyan */
  --color-accent-50: #ecfeff;
  --color-accent-100: #cffafe;
  --color-accent-200: #a5f3fc;
  --color-accent-300: #67e8f9;
  --color-accent-400: #22d3ee;
  --color-accent-500: #06b6d4;
  --color-accent-600: #0891b2;
  --color-accent-700: #0e7490;
  --color-accent-800: #155e75;
  --color-accent-900: #164e63;

  /* Background layers */
  --bg-base: #fafafa;
  --bg-surface: #ffffff;
  --bg-elevated: #f4f4f5;
  --bg-tertiary: #f0f0f2;
  --bg-overlay: #e4e4e7;
  --bg-hover: #e4e4e7;
  --bg-active: #d4d4d8;

  /* Text colors */
  --text-primary: #18181b;
  --text-secondary: #52525b;
  --text-tertiary: #71717a;
  --text-muted: #a1a1aa;
  --text-inverse: #fafafa;

  /* Border colors */
  --border-subtle: #f4f4f5;
  --border-default: #e4e4e7;
  --border-strong: #d4d4d8;
  --border-focus: var(--color-primary-500);

  /* Interactive states */
  --interactive-normal: var(--color-primary-600);
  --interactive-hover: var(--color-primary-700);
  --interactive-active: var(--color-primary-800);

  /* Component-specific */
  --card-bg: var(--bg-surface);
  --card-border: var(--border-default);
  --input-bg: var(--bg-surface);
  --input-border: var(--border-default);
  --button-primary-bg: var(--color-primary-600);
  --button-primary-hover: var(--color-primary-700);
  --button-primary-text: white;
  --button-secondary-bg: transparent;
  --button-secondary-border: var(--border-strong);
  --button-secondary-text: var(--text-primary);

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #7c3aed, #06b6d4);
  --gradient-primary-hover: linear-gradient(135deg, #8b5cf6, #22d3ee);

  /* Glass */
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(0, 0, 0, 0.06);

  /* Shadows for light mode */
  --shadow-color: 240deg 5% 50%;
  --shadow-sm: 0 1px 2px hsl(var(--shadow-color) / 0.06);
  --shadow-md: 0 4px 6px hsl(var(--shadow-color) / 0.08);
  --shadow-lg: 0 10px 15px hsl(var(--shadow-color) / 0.1);
  --shadow-glow: 0 0 20px rgba(139, 92, 246, 0.15);

  /* Scrollbar */
  --scrollbar-track: var(--bg-overlay);
  --scrollbar-thumb: var(--border-strong);
  --scrollbar-thumb-hover: var(--text-tertiary);

  /* Code/syntax */
  --code-bg: #f5f3ff;
  --code-border: #ede9fe;
  --code-text: #4c1d95;

  /* Status badges */
  --badge-success-bg: rgba(16, 185, 129, 0.1);
  --badge-success-text: #059669;
  --badge-warning-bg: rgba(245, 158, 11, 0.1);
  --badge-warning-text: #b45309;
  --badge-error-bg: rgba(239, 68, 68, 0.1);
  --badge-error-text: #dc2626;
  --badge-info-bg: rgba(59, 130, 246, 0.1);
  --badge-info-text: #2563eb;

  /* Charts/data viz */
  --chart-1: var(--color-primary-500);
  --chart-2: var(--color-accent-500);
  --chart-3: #10b981;
  --chart-4: #3b82f6;
  --chart-5: #8b5cf6;
}

/* ============================================
   Base Styles
   ============================================ */

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  transition: background-color var(--transition-normal), color var(--transition-normal);
  line-height: 1.6;
}

/* ============================================
   Global Focus Visible
   ============================================ */

:focus-visible {
  outline: 2px solid var(--border-focus, var(--color-primary-400));
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* ============================================
   Reduced Motion
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================
   Scrollbar Styling
   ============================================ */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.3;
  margin: 0 0 var(--space-md) 0;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
  color: var(--text-secondary);
  margin: 0 0 var(--space-md) 0;
}

a {
  color: var(--interactive-normal);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--interactive-hover);
}

code, pre {
  font-family: var(--font-family-mono);
  font-size: 0.875em;
}

code {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius-sm);
  padding: 0.125em 0.375em;
  color: var(--code-text);
}

pre {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  overflow-x: auto;
}

pre code {
  background: transparent;
  border: none;
  padding: 0;
}

/* ============================================
   Theme Toggle Animation
   ============================================ */

.theme-transition,
.theme-transition *,
.theme-transition *::before,
.theme-transition *::after {
  transition: background-color var(--transition-slow),
              border-color var(--transition-slow),
              color var(--transition-slow),
              box-shadow var(--transition-slow) !important;
}