/* ===== Silver Lang Theme System ===== */

/* -- Shared Tokens (space, type scale, fonts, radii, transitions, z-index) -- */
:root {
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  --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: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;

  --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
  --font-display: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;

  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;
}

/* ===== Dark Theme (default, set on :root) ===== */
:root {
  --color-bg-primary: #080808;
  --color-bg-secondary: #0c0c0c;
  --color-bg-tertiary: #111111;
  --color-bg-elevated: #141414;
  --color-bg-hover: #1a1a1a;
  --color-bg-active: #222222;

  --color-surface: #0e0e0e;
  --color-surface-hover: #141414;
  --color-surface-secondary: #101010;

  --color-border-primary: #1c1c1c;
  --color-border-secondary: #141414;
  --color-border-hover: #2a2a2a;
  --color-border-active: #555555;

  --color-text-primary: #ededed;
  --color-text-secondary: #999999;
  --color-text-tertiary: #666666;
  --color-text-disabled: #444444;
  --color-text-inverse: #080808;

  --color-accent: #d4d4d4;
  --color-accent-hover: #e8e8e8;
  --color-accent-subtle: rgba(180, 180, 180, 0.08);
  --color-accent-glow: rgba(180, 180, 180, 0.12);

  --color-success: #3fb950;
  --color-warning: #d2991d;
  --color-error: #f85149;
  --color-info: #8b949e;

  --color-code-bg: #050505;
  --color-code-border: #181818;
  --color-code-text: #d4d4d4;
  --color-code-keyword: #c0c0c0;
  --color-code-string: #7eb77f;
  --color-code-number: #d4a76a;
  --color-code-type: #8ab4d8;
  --color-code-comment: #555555;
  --color-code-function: #b0b0b0;
  --color-code-operator: #d49a9a;

  --color-gradient-1: #c8c8c8;
  --color-gradient-2: #999999;
  --color-gradient-3: #777777;

  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.5), 0 1px 2px rgba(0, 0, 0, 0.6);
  --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.5), 0 1px 3px rgba(0, 0, 0, 0.4);
}

/* ===== Light Theme (explicit user choice) ===== */
[data-theme="light"] {
  --color-bg-primary: #fafafa;
  --color-bg-secondary: #f5f5f7;
  --color-bg-tertiary: #eeeeef;
  --color-bg-elevated: #ffffff;
  --color-bg-hover: #e8e8ec;
  --color-bg-active: #e0e0e5;

  --color-surface: #ffffff;
  --color-surface-hover: #f8f8fa;
  --color-surface-secondary: #f3f3f5;

  --color-border-primary: #e5e5ea;
  --color-border-secondary: #eaeaef;
  --color-border-hover: #d1d1d8;
  --color-border-active: #6366f1;

  --color-text-primary: #1c1c1e;
  --color-text-secondary: #636366;
  --color-text-tertiary: #aeaeb5;
  --color-text-disabled: #c7c7cc;
  --color-text-inverse: #ffffff;

  --color-accent: #6366f1;
  --color-accent-hover: #4f46e5;
  --color-accent-subtle: rgba(99, 102, 241, 0.08);
  --color-accent-glow: rgba(99, 102, 241, 0.15);

  --color-success: #16a34a;
  --color-warning: #d97706;
  --color-error: #dc2626;
  --color-info: #2563eb;

  --color-code-bg: #f8f8fa;
  --color-code-border: #e5e5ea;
  --color-code-text: #1e1e24;
  --color-code-keyword: #7c3aed;
  --color-code-string: #059669;
  --color-code-number: #d97706;
  --color-code-type: #2563eb;
  --color-code-comment: #9ca3af;
  --color-code-function: #4f46e5;
  --color-code-operator: #db2777;

  --color-gradient-1: #6366f1;
  --color-gradient-2: #8b5cf6;
  --color-gradient-3: #d946ef;

  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(99, 102, 241, 0.06);
}

/* ===== System Preference Detection =====
   Only applies when NO explicit data-theme is set.
   Once theme.js sets data-theme="dark" or data-theme="light",
   these media queries can never match. */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) {
    --color-bg-primary: #fafafa;
    --color-bg-secondary: #f5f5f7;
    --color-bg-tertiary: #eeeeef;
    --color-bg-elevated: #ffffff;
    --color-bg-hover: #e8e8ec;
    --color-bg-active: #e0e0e5;
    --color-surface: #ffffff;
    --color-surface-hover: #f8f8fa;
    --color-surface-secondary: #f3f3f5;
    --color-border-primary: #e5e5ea;
    --color-border-secondary: #eaeaef;
    --color-border-hover: #d1d1d8;
    --color-border-active: #6366f1;
    --color-text-primary: #1c1c1e;
    --color-text-secondary: #636366;
    --color-text-tertiary: #aeaeb5;
    --color-text-disabled: #c7c7cc;
    --color-text-inverse: #ffffff;
    --color-accent: #6366f1;
    --color-accent-hover: #4f46e5;
    --color-accent-subtle: rgba(99, 102, 241, 0.08);
    --color-accent-glow: rgba(99, 102, 241, 0.15);
    --color-code-bg: #f8f8fa;
    --color-code-border: #e5e5ea;
    --color-code-text: #1e1e24;
    --color-code-keyword: #7c3aed;
    --color-code-string: #059669;
    --color-code-number: #d97706;
    --color-code-type: #2563eb;
    --color-code-comment: #9ca3af;
    --color-code-function: #4f46e5;
    --color-code-operator: #db2777;
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(99, 102, 241, 0.06);
  }
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) {
    --color-bg-primary: #080808;
    --color-bg-secondary: #0c0c0c;
    --color-bg-tertiary: #111111;
    --color-bg-elevated: #141414;
    --color-bg-hover: #1a1a1a;
    --color-bg-active: #222222;
    --color-surface: #0e0e0e;
    --color-surface-hover: #141414;
    --color-surface-secondary: #101010;
    --color-border-primary: #1c1c1c;
    --color-border-secondary: #141414;
    --color-border-hover: #2a2a2a;
    --color-border-active: #555555;
    --color-text-primary: #ededed;
    --color-text-secondary: #999999;
    --color-text-tertiary: #666666;
    --color-text-disabled: #444444;
    --color-text-inverse: #080808;
    --color-accent: #d4d4d4;
    --color-accent-hover: #e8e8e8;
    --color-accent-subtle: rgba(180, 180, 180, 0.08);
    --color-accent-glow: rgba(180, 180, 180, 0.12);
    --color-success: #3fb950;
    --color-warning: #d2991d;
    --color-error: #f85149;
    --color-info: #8b949e;
    --color-code-bg: #050505;
    --color-code-border: #181818;
    --color-code-text: #d4d4d4;
    --color-code-keyword: #c0c0c0;
    --color-code-string: #7eb77f;
    --color-code-number: #d4a76a;
    --color-code-type: #8ab4d8;
    --color-code-comment: #555555;
    --color-code-function: #b0b0b0;
    --color-code-operator: #d49a9a;
    --color-gradient-1: #c8c8c8;
    --color-gradient-2: #999999;
    --color-gradient-3: #777777;
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.5), 0 1px 2px rgba(0, 0, 0, 0.6);
    --shadow-card-hover: 0 4px 12px rgba(0, 0, 0, 0.5), 0 1px 3px rgba(0, 0, 0, 0.4);
  }
}