/* ============================================================
   THEME SYSTEM - CSS VARIABLES FOR LIGHT AND DARK MODES
   ============================================================ */

/* Light Theme (Default) */
:root {
  /* Primary Colors */
  --color-primary: #4b3fe2;
  --color-primary-container: #9895ff;
  --color-on-primary: #f5f1ff;
  --color-primary-fixed: #9895ff;
  --color-primary-dim: #3f2fd6;
  
  /* Secondary Colors */
  --color-secondary: #6348b1;
  --color-secondary-container: #d8caff;
  --color-on-secondary: #f7f0ff;
  --color-secondary-fixed: #d8caff;
  --color-secondary-dim: #573ca4;
  
  /* Tertiary Colors */
  --color-tertiary: #983771;
  --color-tertiary-container: #fe8bc9;
  --color-on-tertiary: #ffeff4;
  --color-tertiary-fixed: #fe8bc9;
  --color-tertiary-dim: #892a64;
  
  /* Error Colors */
  --color-error: #b41340;
  --color-error-dim: #a70138;
  --color-error-container: #f74b6d;
  --color-on-error: #ffefef;
  --color-on-error-container: #510017;
  
  /* Surface Colors */
  --color-background: #fbf4ff;
  --color-surface: #fbf4ff;
  --color-surface-bright: #fbf4ff;
  --color-surface-dim: #dbcdff;
  --color-surface-container-lowest: #ffffff;
  --color-surface-container-low: #f5eeff;
  --color-surface-container: #ede4ff;
  --color-surface-container-high: #e8ddff;
  --color-surface-container-highest: #e3d7ff;
  
  /* On-Surface Colors */
  --color-on-background: #32284f;
  --color-on-surface: #32284f;
  --color-on-surface-variant: #60557f;
  
  /* Outline Colors */
  --color-outline: #7b709c;
  --color-outline-variant: #b3a6d5;
  
  /* Inverse Colors */
  --color-inverse-surface: #11062d;
  --color-inverse-on-surface: #a296c4;
  --color-inverse-primary: #8681ff;
  
  /* Container Colors */
  --color-surface-tint: #4b3fe2;
  --color-on-primary-container: #15007d;
  --color-on-secondary-container: #4f329c;
  --color-on-tertiary-container: #610243;
  --color-on-tertiary-fixed-variant: #6d104d;
  --color-on-primary-fixed-variant: #1c0098;
  --color-on-secondary-fixed-variant: #583da6;
  --color-on-tertiary-fixed: #360023;
  --color-on-primary-fixed: #000000;
  --color-on-secondary-fixed: #3b1a88;

  /* Semantic Colors */
  --color-success: #2e7d32;
  --color-warning: #f57c00;
  --color-info: #1976d2;
  
  /* Text Colors */
  --text-primary: #32284f;
  --text-secondary: #60557f;
  --text-tertiary: #999999;
  --text-light: #fafbfc;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.6s ease;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
}

/* Dark Theme */
html.dark-theme,
html[data-theme="dark"],
body.dark-theme {
  --color-primary: #8681ff;
  --color-primary-container: #3f2fd6;
  --color-on-primary: #000000;
  --color-primary-fixed: #9895ff;
  --color-primary-dim: #6348b1;
  
  --color-secondary: #cbbaff;
  --color-secondary-container: #4f329c;
  --color-on-secondary: #3b1a88;
  --color-secondary-fixed: #d8caff;
  --color-secondary-dim: #573ca4;
  
  --color-tertiary: #ee7ebb;
  --color-tertiary-container: #6d104d;
  --color-on-tertiary: #360023;
  --color-tertiary-fixed: #fe8bc9;
  --color-tertiary-dim: #892a64;
  
  --color-error: #f74b6d;
  --color-error-dim: #a70138;
  --color-error-container: #5d1a2d;
  --color-on-error: #ffefef;
  --color-on-error-container: #f9dedf;
  
  --color-background: #11062d;
  --color-surface: #1a0d36;
  --color-surface-bright: #32284f;
  --color-surface-dim: #0d0620;
  --color-surface-container-lowest: #0a0318;
  --color-surface-container-low: #170d2e;
  --color-surface-container: #1f1543;
  --color-surface-container-high: #27195b;
  --color-surface-container-highest: #322066;
  
  --color-on-background: #e3d7ff;
  --color-on-surface: #e3d7ff;
  --color-on-surface-variant: #c9bfd6;
  
  --color-outline: #978db6;
  --color-outline-variant: #504767;
  
  --color-inverse-surface: #e3d7ff;
  --color-inverse-on-surface: #11062d;
  --color-inverse-primary: #4b3fe2;
  
  --color-surface-tint: #8681ff;
  --color-on-primary-container: #e0d9ff;
  --color-on-secondary-container: #e8ddff;
  --color-on-tertiary-container: #ffd8eb;
  --color-on-tertiary-fixed-variant: #ffa6d6;
  --color-on-primary-fixed-variant: #c9beff;
  --color-on-secondary-fixed-variant: #ebe0ff;
  --color-on-tertiary-fixed: #ffc9e3;
  --color-on-primary-fixed: #31285b;
  --color-on-secondary-fixed: #5a3e9b;
  
  --text-primary: #e3d7ff;
  --text-secondary: #c9bfd6;
  --text-tertiary: #888888;
  --text-light: #1a1a1a;
}

/* ============================================================
   BASE STYLES
   ============================================================ */

/* Material Symbols Icon Configuration */
.material-symbols-outlined {
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
}

/* Root & HTML Setup */
html,
html.light-theme {
  color-scheme: light;
  --current-bg: var(--color-background);
  --current-surface: var(--color-surface);
  --current-text: var(--color-on-background);
  --current-text-secondary: var(--color-on-surface-variant);
  --current-border: var(--color-outline-variant);
  --current-primary: var(--color-primary);
}

html.dark-theme {
  color-scheme: dark;
}

/* Body Styling */
body {
  font-family: "Inter", sans-serif;
  background-color: var(--color-background);
  color: var(--color-on-background);
  min-height: 100dvh;
  transition: background-color var(--transition-normal),
              color var(--transition-normal),
              border-color var(--transition-normal);
  margin: 0;
  padding: 0;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-on-surface);
  font-family: "Manrope", sans-serif;
  font-weight: 700;
  transition: color var(--transition-normal);
}

p, span, a, li {
  color: var(--color-on-surface);
  transition: color var(--transition-normal);
}

.font-manrope {
  font-family: "Manrope", sans-serif;
}

.font-inter {
  font-family: "Inter", sans-serif;
}

/* ============================================================
   COMPONENT STYLES - BUTTONS
   ============================================================ */

button,
.button {
  background-color: var(--color-primary-container);
  color: var(--color-on-primary-container);
  border: 2px solid transparent;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: 0.75rem;
  font-family: "Inter", sans-serif;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  font-size: 1rem;
}

button:hover,
.button:hover {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(75, 63, 226, 0.3);
}

button:active,
.button:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(75, 63, 226, 0.2);
}

button:disabled,
.button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Primary Button */
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-container) 100%);
  color: var(--color-on-primary);
  font-weight: 700;
}

.btn-primary:hover {
  box-shadow: 0 8px 24px rgba(75, 63, 226, 0.4);
}

/* Secondary Button */
.btn-secondary {
  background-color: var(--color-secondary-container);
  color: var(--color-on-secondary-container);
  border-color: var(--color-secondary);
}

.btn-secondary:hover {
  background-color: var(--color-secondary);
  color: var(--color-on-secondary);
}

/* Tertiary Button */
.btn-tertiary {
  background-color: var(--color-tertiary-container);
  color: var(--color-on-tertiary-container);
}

.btn-tertiary:hover {
  background-color: var(--color-tertiary);
  color: var(--color-on-tertiary);
}

/* Outline Button */
.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary-container);
  color: var(--color-on-primary-container);
}

/* Text Button */
.btn-text {
  background-color: transparent;
  color: var(--color-primary);
  padding: var(--spacing-sm) var(--spacing-md);
}

.btn-text:hover {
  background-color: var(--color-primary-container);
  color: var(--color-on-primary-container);
  box-shadow: none;
}

/* ============================================================
   COMPONENT STYLES - INPUTS
   ============================================================ */

input,
textarea,
select {
  background-color: var(--color-surface-container);
  color: var(--color-on-surface);
  border: 2px solid var(--color-outline-variant);
  padding: var(--spacing-md);
  border-radius: 0.5rem;
  font-family: "Inter", sans-serif;
  font-size: 1rem;
  transition: all var(--transition-normal);
}

input::placeholder,
textarea::placeholder {
  color: var(--color-on-surface-variant);
  opacity: 0.7;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  background-color: var(--color-surface-container-high);
  box-shadow: 0 0 0 3px rgba(75, 63, 226, 0.1);
}

input:disabled,
textarea:disabled,
select:disabled {
  background-color: var(--color-surface-dim);
  color: var(--color-on-surface-variant);
  opacity: 0.6;
  cursor: not-allowed;
}

/* ============================================================
   COMPONENT STYLES - LINKS
   ============================================================ */

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
  position: relative;
}

a:hover {
  color: var(--color-primary-container);
  text-decoration: underline;
}

a:active {
  color: var(--color-primary-dim);
}

a:visited {
  color: var(--color-secondary);
}

/* Underline Animation */
a.link-underline {
  text-decoration: none;
  border-bottom: 2px solid var(--color-primary);
  padding-bottom: 2px;
}

a.link-underline:hover {
  border-bottom-color: var(--color-primary-container);
}

/* ============================================================
   CONTAINER STYLES
   ============================================================ */

.container {
  background-color: var(--color-surface);
  color: var(--color-on-surface);
  transition: all var(--transition-normal);
}

.card {
  background-color: var(--color-surface-container);
  color: var(--color-on-surface);
  border: 1px solid var(--color-outline-variant);
  border-radius: 1.5rem;
  padding: var(--spacing-lg);
  transition: all var(--transition-normal);
}

.card:hover {
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
  border-color: var(--color-outline);
}

.header {
  background-color: var(--color-surface-container);
  border-bottom: 1px solid var(--color-outline-variant);
  padding: var(--spacing-md) var(--spacing-lg);
  transition: all var(--transition-normal);
}

.footer {
  background-color: var(--color-surface-container-high);
  color: var(--color-on-surface-variant);
  padding: var(--spacing-xl);
  border-top: 1px solid var(--color-outline-variant);
}

/* ============================================================
   UTILITY CLASSES
   ============================================================ */

.tonal-layering {
  background-color: rgba(251, 244, 255, 0.6);
  transition: background-color var(--transition-normal);
}

html.dark-theme .tonal-layering {
  background-color: rgba(50, 40, 79, 0.6);
}

.tonal-shift {
  background-color: rgba(255, 255, 255, 0.6);
  transition: background-color var(--transition-normal);
}

html.dark-theme .tonal-shift {
  background-color: rgba(50, 40, 79, 0.6);
}

.tap-highlight-none {
  -webkit-tap-highlight-color: transparent;
}

.glass-panel {
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(20px);
  transition: all var(--transition-normal);
}

html.dark-theme .glass-panel {
  background: rgba(50, 40, 79, 0.6);
}

.divider {
  background-color: var(--color-outline-variant);
  height: 1px;
  transition: background-color var(--transition-normal);
}

/* Background Utilities */
.bg-primary { background-color: var(--color-primary); }
.bg-primary-container { background-color: var(--color-primary-container); }
.bg-secondary { background-color: var(--color-secondary); }
.bg-tertiary { background-color: var(--color-tertiary); }
.bg-surface { background-color: var(--color-surface); }
.bg-surface-container { background-color: var(--color-surface-container); }
.bg-error { background-color: var(--color-error); }

/* Text Utilities */
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-tertiary { color: var(--color-tertiary); }
.text-error { color: var(--color-error); }
.text-on-surface { color: var(--color-on-surface); }
.text-on-surface-variant { color: var(--color-on-surface-variant); }

/* Border Utilities */
.border-primary { border-color: var(--color-primary); }
.border-outline { border-color: var(--color-outline); }
.border-outline-variant { border-color: var(--color-outline-variant); }

/* Shadow Utilities */
.shadow-primary {
  box-shadow: 0 4px 12px rgba(75, 63, 226, 0.2);
}

.shadow-lg {
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
}

/* Opacity Utilities */
.opacity-hover:hover {
  opacity: 0.8;
}

/* ============================================================
   DARK MODE TOGGLE SUPPORT
   ============================================================ */

/* Smooth transition when toggling theme */
html.theme-switching,
html.theme-switching * {
  transition: background-color var(--transition-normal),
              color var(--transition-normal),
              border-color var(--transition-normal) !important;
}

/* ============================================================
   FOCUS STATES & ACCESSIBILITY
   ============================================================ */

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

/* Smooth Transitions */
.transition-all {
  transition: all 300ms ease-in-out;
}

/* Dark Mode for inputs and forms */
input:focus {
  outline: none;
}

input::placeholder {
  color: rgba(75, 63, 226, 0.3);
}

.dark input::placeholder {
  color: rgba(232, 221, 255, 0.3);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(75, 63, 226, 0.3);
  border-radius: 4px;
  transition: background 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(75, 63, 226, 0.5);
}

.dark ::-webkit-scrollbar-thumb {
  background: rgba(232, 221, 255, 0.2);
}

.dark ::-webkit-scrollbar-thumb:hover {
  background: rgba(232, 221, 255, 0.4);
}