/**
 * Themes CSS - Dark/Light Mode System
 * halluciphile.com Modern Template
 *
 * Implementation Strategy:
 * 1. Dark mode is DEFAULT
 * 2. Auto-detect light mode via @media (prefers-color-scheme)
 * 3. Manual override via [data-theme] attribute
 * 4. User preference saved in localStorage
 */

/* ==================== AUTOMATIC LIGHT MODE ==================== */
/* Activates when user's system prefers light mode */

@media (prefers-color-scheme: light) {
  :root {
    /* Backgrounds */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F5F5F5;
    --bg-elevated: #FFFFFF;
    --bg-hover: #E5E5E5;

    /* Text */
    --text-primary: #1A1A1A;
    --text-secondary: #666666;
    --text-disabled: #A0A0A0;

    /* Borders */
    --border-color: #E0E0E0;
    --border-hover: #CCCCCC;

    /* Shadows - Lighter for light mode */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Accent colors stay the same but may need adjustment for contrast */
    --accent-primary-hover: #4F46E5; /* Slightly darker for better contrast on white */
  }
}

/* ==================== MANUAL LIGHT MODE OVERRIDE ==================== */
/* Activated when user manually selects light mode */

[data-theme="light"] {
  /* Backgrounds */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F5F5F5;
  --bg-elevated: #FFFFFF;
  --bg-hover: #E5E5E5;

  /* Text */
  --text-primary: #1A1A1A;
  --text-secondary: #666666;
  --text-disabled: #A0A0A0;

  /* Borders */
  --border-color: #E0E0E0;
  --border-hover: #CCCCCC;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  --accent-primary-hover: #4F46E5;
}

/* ==================== MANUAL DARK MODE OVERRIDE ==================== */
/* Activated when user manually selects dark mode (overrides system light preference) */

[data-theme="dark"] {
  /* Backgrounds */
  --bg-primary: #121212;
  --bg-secondary: #1E1E1E;
  --bg-elevated: #2C2C2C;
  --bg-hover: #383838;

  /* Text */
  --text-primary: #E0E0E0;
  --text-secondary: #A0A0A0;
  --text-disabled: #6C6C6C;

  /* Borders */
  --border-color: #3C3C3C;
  --border-hover: #4C4C4C;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.6);

  --accent-primary-hover: #5558E3;
}

/* ==================== THEME TOGGLE BUTTON ==================== */

.theme-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--duration-base) var(--ease-out);
}

.theme-toggle:hover {
  background: var(--bg-hover);
  border-color: var(--border-hover);
  transform: scale(1.05);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

.theme-toggle:active {
  transform: scale(0.95);
}

/* Icon visibility based on theme */
.theme-toggle .icon-dark {
  display: block;
  font-size: 1.25rem;
}

.theme-toggle .icon-light {
  display: none;
  font-size: 1.25rem;
}

/* Show sun icon in dark mode, moon icon in light mode */
[data-theme="light"] .theme-toggle .icon-dark {
  display: none;
}

[data-theme="light"] .theme-toggle .icon-light {
  display: block;
}

/* Auto light mode icon switching */
@media (prefers-color-scheme: light) {
  /* Only if no manual override */
  :root:not([data-theme]) .theme-toggle .icon-dark {
    display: none;
  }

  :root:not([data-theme]) .theme-toggle .icon-light {
    display: block;
  }
}

/* ==================== THEME TRANSITION ==================== */
/* Smooth transition when switching themes */

:root {
  transition: background-color var(--duration-base) var(--ease-out),
              color var(--duration-base) var(--ease-out);
}

/* Disable transitions on page load to prevent flash */
.no-transition,
.no-transition * {
  transition: none !important;
}

/* ==================== THEME-SPECIFIC ADJUSTMENTS ==================== */

/* Code blocks look better with slight differences */
[data-theme="light"] code,
[data-theme="light"] pre {
  background: #F5F5F5;
  border: 1px solid var(--border-color);
}

/* Links in light mode need more contrast */
[data-theme="light"] a {
  color: #4F46E5; /* Darker indigo for better contrast */
}

[data-theme="light"] a:hover {
  color: #7C3AED; /* Darker purple */
}

/* Blockquotes */
[data-theme="light"] blockquote {
  border-left-color: #4F46E5;
  background: #F9FAFB;
  padding: var(--space-4);
  border-radius: var(--radius-md);
}

/* Images with transparent backgrounds */
[data-theme="light"] img[src$=".png"] {
  /* Optional: Add subtle background for PNGs with transparency */
  /* background: #F9FAFB; */
}

/* ==================== SYSTEM DARK MODE (AUTO) ==================== */
/* Ensure dark mode works when no manual override is set */

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    /* Already defined in core.css, but explicit for clarity */
    color-scheme: dark;
  }
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    color-scheme: light;
  }
}

/* Manual overrides */
[data-theme="dark"] {
  color-scheme: dark;
}

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

/* ==================== PRINT STYLES ==================== */
/* Force light mode for printing */

@media print {
  :root {
    --bg-primary: #FFFFFF;
    --bg-secondary: #F5F5F5;
    --bg-elevated: #FFFFFF;
    --text-primary: #000000;
    --text-secondary: #4A4A4A;
    --border-color: #E0E0E0;
  }

  /* Hide theme toggle in print */
  .theme-toggle {
    display: none !important;
  }

  /* Remove shadows for print */
  * {
    box-shadow: none !important;
  }
}

/* ==================== THEME UTILITIES ==================== */

/* Force dark theme on specific elements */
.theme-dark {
  --bg-primary: #121212;
  --bg-secondary: #1E1E1E;
  --text-primary: #E0E0E0;
  --text-secondary: #A0A0A0;
}

/* Force light theme on specific elements */
.theme-light {
  --bg-primary: #FFFFFF;
  --bg-secondary: #F5F5F5;
  --text-primary: #1A1A1A;
  --text-secondary: #666666;
}

/* High contrast variant (for accessibility) */
.theme-high-contrast {
  --bg-primary: #000000;
  --bg-secondary: #1A1A1A;
  --text-primary: #FFFFFF;
  --text-secondary: #E0E0E0;
  --border-color: #FFFFFF;
  --accent-primary: #00D9FF; /* High contrast cyan */
}

/* ==================== CONTRAST CHECKER (DEV ONLY) ==================== */
/* Uncomment to visually check contrast ratios during development */

/*
[data-dev-contrast] * {
  outline: 1px solid red;
}

[data-dev-contrast] *:is(h1, h2, h3, h4, h5, h6, p, a, button, input, label) {
  outline: 2px solid lime;
}
*/