/* ============================================
   MATERIAL DESIGN 3 - THEME SYSTEM
   Dynamic Color Tokens & Theme Variables
   ============================================ */

/* 🎨 Material Design 3 Color Tokens */
:root {
  /* === Light Theme Palette === */
  --md-sys-color-primary-light: #e50914;
  --md-sys-color-on-primary-light: #ffffff;
  --md-sys-color-primary-container-light: #ffdad6;
  --md-sys-color-on-primary-container-light: #410002;
  
  --md-sys-color-surface-light: #fefbff;
  --md-sys-color-surface-dim-light: #e0e0e0;
  --md-sys-color-surface-bright-light: #ffffff;
  --md-sys-color-surface-container-light: #f3f3f3;
  --md-sys-color-surface-container-low-light: #f8f8f8;
  --md-sys-color-surface-container-high-light: #ececec;
  --md-sys-color-surface-variant-light: #f5f5f5;
  
  --md-sys-color-on-surface-light: #1c1b1f;
  --md-sys-color-on-surface-variant-light: #49454f;
  
  --md-sys-color-outline-light: #79747e;
  --md-sys-color-outline-variant-light: #cac4d0;
  
  --md-sys-color-background-light: #fefbff;
  --md-sys-color-on-background-light: #1c1b1f;
  
  --md-sys-color-error-light: #ba1a1a;
  --md-sys-color-on-error-light: #ffffff;
  
  --md-sys-color-shadow-light: #000000;
  --md-sys-color-scrim-light: #000000;
  
  /* === Dark Theme Palette === */
  --md-sys-color-primary-dark: #ff4458;
  --md-sys-color-on-primary-dark: #690005;
  --md-sys-color-primary-container-dark: #93000a;
  --md-sys-color-on-primary-container-dark: #ffdad6;
  
  /* --md-sys-color-surface-dark: rgb(26 17 16); */
  --md-sys-color-surface-dark: #1c1b1f;
  /* --md-sys-color-surface-dim-dark: rgb(26 17 16); */
  --md-sys-color-surface-dim-dark: #141218;
  --md-sys-color-surface-bright-dark: #3b383e;
  --md-sys-color-surface-container-dark: #211f26;
  --md-sys-color-surface-container-low-dark: #1c1b1f;
  --md-sys-color-surface-container-high-dark: #2b2930;
  --md-sys-color-surface-variant-dark: #49454f;
  
  --md-sys-color-on-surface-dark: #e6e1e5;
  --md-sys-color-on-surface-variant-dark: #cac4d0;
  
  --md-sys-color-outline-dark: #938f99;
  --md-sys-color-outline-variant-dark: #49454f;
  
  --md-sys-color-background-dark: rgb(26 17 16);
  /* --md-sys-color-background-dark: #1c1b1f; */
  --md-sys-color-on-background-dark: #e6e1e5;
  
  --md-sys-color-error-dark: #ffb4ab;
  --md-sys-color-on-error-dark: #690005;
  
  --md-sys-color-shadow-dark: #000000;
  --md-sys-color-scrim-dark: #000000;
  
  /* === Material Design 3 Elevation Shadows === */
  --md-sys-elevation-0: none;
  --md-sys-elevation-1: 0px 1px 2px rgba(0, 0, 0, 0.3), 0px 1px 3px 1px rgba(0, 0, 0, 0.15);
  --md-sys-elevation-2: 0px 1px 2px rgba(0, 0, 0, 0.3), 0px 2px 6px 2px rgba(0, 0, 0, 0.15);
  --md-sys-elevation-3: 0px 4px 8px 3px rgba(0, 0, 0, 0.15), 0px 1px 3px rgba(0, 0, 0, 0.3);
  --md-sys-elevation-4: 0px 6px 10px 4px rgba(0, 0, 0, 0.15), 0px 2px 3px rgba(0, 0, 0, 0.3);
  --md-sys-elevation-5: 0px 8px 12px 6px rgba(0, 0, 0, 0.15), 0px 4px 4px rgba(0, 0, 0, 0.3);
  
  /* === Material Design 3 Shape === */
  --md-sys-shape-corner-none: 0px;
  --md-sys-shape-corner-extra-small: 4px;
  --md-sys-shape-corner-small: 8px;
  --md-sys-shape-corner-medium: 12px;
  --md-sys-shape-corner-large: 16px;
  --md-sys-shape-corner-extra-large: 28px;
  --md-sys-shape-corner-full: 9999px;
  
  /* === Material Design 3 Motion === */
  --md-sys-motion-easing-standard: cubic-bezier(0.2, 0, 0, 1);
  --md-sys-motion-easing-emphasized: cubic-bezier(0.2, 0, 0, 1);
  --md-sys-motion-easing-emphasized-decelerate: cubic-bezier(0.05, 0.7, 0.1, 1);
  --md-sys-motion-easing-emphasized-accelerate: cubic-bezier(0.3, 0, 0.8, 0.15);
  --md-sys-motion-duration-short1: 50ms;
  --md-sys-motion-duration-short2: 100ms;
  --md-sys-motion-duration-short3: 150ms;
  --md-sys-motion-duration-short4: 200ms;
  --md-sys-motion-duration-medium1: 250ms;
  --md-sys-motion-duration-medium2: 300ms;
  --md-sys-motion-duration-medium3: 350ms;
  --md-sys-motion-duration-medium4: 400ms;
  --md-sys-motion-duration-long1: 450ms;
  --md-sys-motion-duration-long2: 500ms;
  
  /* === Typography Scale === */
  --md-sys-typescale-display-large-size: 57px;
  --md-sys-typescale-display-medium-size: 45px;
  --md-sys-typescale-display-small-size: 36px;
  --md-sys-typescale-headline-large-size: 32px;
  --md-sys-typescale-headline-medium-size: 28px;
  --md-sys-typescale-headline-small-size: 24px;
  --md-sys-typescale-title-large-size: 22px;
  --md-sys-typescale-title-medium-size: 16px;
  --md-sys-typescale-title-small-size: 14px;
  --md-sys-typescale-body-large-size: 16px;
  --md-sys-typescale-body-medium-size: 14px;
  --md-sys-typescale-body-small-size: 12px;
  --md-sys-typescale-label-large-size: 14px;
  --md-sys-typescale-label-medium-size: 12px;
  --md-sys-typescale-label-small-size: 11px;

  --nav-height: 72px;
}

/* ============================================
   THEME APPLICATION - Light Mode (Default)
   ============================================ */
[data-theme="light"], 
:root:not([data-theme="dark"]) {
  --md-sys-color-primary: var(--md-sys-color-primary-light);
  --md-sys-color-on-primary: var(--md-sys-color-on-primary-light);
  --md-sys-color-primary-container: var(--md-sys-color-primary-container-light);
  --md-sys-color-on-primary-container: var(--md-sys-color-on-primary-container-light);
  
  --md-sys-color-surface: var(--md-sys-color-surface-light);
  --md-sys-color-surface-dim: var(--md-sys-color-surface-dim-light);
  --md-sys-color-surface-bright: var(--md-sys-color-surface-bright-light);
  --md-sys-color-surface-container: var(--md-sys-color-surface-container-light);
  --md-sys-color-surface-container-low: var(--md-sys-color-surface-container-low-light);
  --md-sys-color-surface-container-high: var(--md-sys-color-surface-container-high-light);
  --md-sys-color-surface-variant: var(--md-sys-color-surface-variant-light);
  
  --md-sys-color-on-surface: var(--md-sys-color-on-surface-light);
  --md-sys-color-on-surface-variant: var(--md-sys-color-on-surface-variant-light);
  
  --md-sys-color-outline: var(--md-sys-color-outline-light);
  --md-sys-color-outline-variant: var(--md-sys-color-outline-variant-light);
  
  --md-sys-color-background: var(--md-sys-color-background-light);
  --md-sys-color-on-background: var(--md-sys-color-on-background-light);
  
  --md-sys-color-error: var(--md-sys-color-error-light);
  --md-sys-color-on-error: var(--md-sys-color-on-error-light);
  
  --md-sys-color-shadow: var(--md-sys-color-shadow-light);
  --md-sys-color-scrim: var(--md-sys-color-scrim-light);
  
  color-scheme: light;
}

/* ============================================
   THEME APPLICATION - Dark Mode
   ============================================ */
[data-theme="dark"] {
  --md-sys-color-primary: var(--md-sys-color-primary-dark);
  --md-sys-color-on-primary: var(--md-sys-color-on-primary-dark);
  --md-sys-color-primary-container: var(--md-sys-color-primary-container-dark);
  --md-sys-color-on-primary-container: var(--md-sys-color-on-primary-container-dark);
  
  --md-sys-color-surface: var(--md-sys-color-surface-dark);
  --md-sys-color-surface-dim: var(--md-sys-color-surface-dim-dark);
  --md-sys-color-surface-bright: var(--md-sys-color-surface-bright-dark);
  --md-sys-color-surface-container: var(--md-sys-color-surface-container-dark);
  --md-sys-color-surface-container-low: var(--md-sys-color-surface-container-low-dark);
  --md-sys-color-surface-container-high: var(--md-sys-color-surface-container-high-dark);
  --md-sys-color-surface-variant: var(--md-sys-color-surface-variant-dark);
  
  --md-sys-color-on-surface: var(--md-sys-color-on-surface-dark);
  --md-sys-color-on-surface-variant: var(--md-sys-color-on-surface-variant-dark);
  
  --md-sys-color-outline: var(--md-sys-color-outline-dark);
  --md-sys-color-outline-variant: var(--md-sys-color-outline-variant-dark);
  
  --md-sys-color-background: var(--md-sys-color-background-dark);
  --md-sys-color-on-background: var(--md-sys-color-on-background-dark);
  
  --md-sys-color-error: var(--md-sys-color-error-dark);
  --md-sys-color-on-error: var(--md-sys-color-on-error-dark);
  
  --md-sys-color-shadow: var(--md-sys-color-shadow-dark);
  --md-sys-color-scrim: var(--md-sys-color-scrim-dark);
  
  color-scheme: dark;
}

/* ============================================
   THEME TOGGLE BUTTON - Material Design 3
   ============================================ */
.theme-toggle-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border: none;
  background: transparent;
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  border-radius: var(--md-sys-shape-corner-full);
  transition: background-color var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-standard),
              color var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-standard);
  overflow: hidden;
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}

/* State Layer - Material Design 3 */
.theme-toggle-button::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: currentColor;
  opacity: 0;
  transition: opacity var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
}

/* Hover State */
.theme-toggle-button:hover::before {
  opacity: 0.08;
}

/* Focus State */
.theme-toggle-button:focus {
  outline: none;
}

.theme-toggle-button:focus-visible {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 2px;
}

.theme-toggle-button:focus::before {
  opacity: 0.12;
}

/* Pressed State */
.theme-toggle-button:active::before {
  opacity: 0.12;
}

/* Icon Container */
.theme-toggle-icon {
  position: relative;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

/* Material Icons */
.theme-toggle-icon i {
  font-size: 24px;
  position: absolute;
  transition: transform var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-emphasized),
              opacity var(--md-sys-motion-duration-medium2) var(--md-sys-motion-easing-emphasized);
}

/* Light Mode Icon (Sun) */
.theme-toggle-icon .light-icon {
  transform: rotate(0deg) scale(1);
  opacity: 1;
}

/* Dark Mode Icon (Moon) */
.theme-toggle-icon .dark-icon {
  transform: rotate(-90deg) scale(0);
  opacity: 0;
}

/* Dark Mode Active State */
[data-theme="dark"] .theme-toggle-icon .light-icon {
  transform: rotate(90deg) scale(0);
  opacity: 0;
}

[data-theme="dark"] .theme-toggle-icon .dark-icon {
  transform: rotate(0deg) scale(1);
  opacity: 1;
}

/* Ripple Effect Container */
.theme-toggle-ripple {
  position: absolute;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.2;
  transform: scale(0);
  animation: ripple-animation 600ms var(--md-sys-motion-easing-standard);
  pointer-events: none;
}

@keyframes ripple-animation {
  0% {
    transform: scale(0);
    opacity: 0.3;
  }
  100% {
    transform: scale(2);
    opacity: 0;
  }
}

/* Tooltip for accessibility */
.theme-toggle-button[aria-label]::after {
  content: attr(aria-label);
  position: absolute;
  bottom: -36px;
  left: 50%;
  transform: translateX(-50%) scale(0.9);
  background: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface);
  padding: 6px 12px;
  border-radius: var(--md-sys-shape-corner-small);
  font-size: var(--md-sys-typescale-body-small-size);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  box-shadow: var(--md-sys-elevation-2);
  transition: opacity var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard),
              transform var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
  z-index: 1000;
}

.theme-toggle-button:hover::after {
  opacity: 1;
  transform: translateX(-50%) scale(1);
  transition-delay: 500ms;
}

/* ============================================
   BODY & GLOBAL THEME STYLES
   ============================================ */
body {
  background: radial-gradient(circle at top, 
    var(--md-sys-color-surface-dim) 0%, 
    var(--md-sys-color-surface) 100%);
  color: var(--md-sys-color-on-surface);
  transition: background var(--md-sys-motion-duration-medium4) var(--md-sys-motion-easing-standard),
              color var(--md-sys-motion-duration-medium4) var(--md-sys-motion-easing-standard);
}

/* Smooth theme transition for all elements */
* {
  transition-property: background-color, color, border-color, box-shadow;
  transition-duration: var(--md-sys-motion-duration-medium2);
  transition-timing-function: var(--md-sys-motion-easing-standard);
}

/* Prevent transition on page load */
body.no-transition * {
  transition: none !important;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
  .theme-toggle-button {
    width: 44px;
    height: 44px;
  }
  
  .theme-toggle-icon {
    width: 22px;
    height: 22px;
  }
  
  .theme-toggle-icon i {
    font-size: 22px;
  }
}

@media (max-width: 480px) {
  .theme-toggle-button {
    width: 40px;
    height: 40px;
  }
  
  .theme-toggle-icon {
    width: 20px;
    height: 20px;
  }
  
  .theme-toggle-icon i {
    font-size: 20px;
  }
}

/* ============================================
   PREFERS COLOR SCHEME SUPPORT
   ============================================ */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) {
    --md-sys-color-primary: var(--md-sys-color-primary-dark);
    --md-sys-color-on-primary: var(--md-sys-color-on-primary-dark);
    --md-sys-color-primary-container: var(--md-sys-color-primary-container-dark);
    --md-sys-color-on-primary-container: var(--md-sys-color-on-primary-container-dark);
    
    --md-sys-color-surface: var(--md-sys-color-surface-dark);
    --md-sys-color-surface-dim: var(--md-sys-color-surface-dim-dark);
    --md-sys-color-surface-bright: var(--md-sys-color-surface-bright-dark);
    --md-sys-color-surface-container: var(--md-sys-color-surface-container-dark);
    --md-sys-color-surface-container-low: var(--md-sys-color-surface-container-low-dark);
    --md-sys-color-surface-container-high: var(--md-sys-color-surface-container-high-dark);
    --md-sys-color-surface-variant: var(--md-sys-color-surface-variant-dark);
    
    --md-sys-color-on-surface: var(--md-sys-color-on-surface-dark);
    --md-sys-color-on-surface-variant: var(--md-sys-color-on-surface-variant-dark);
    
    --md-sys-color-outline: var(--md-sys-color-outline-dark);
    --md-sys-color-outline-variant: var(--md-sys-color-outline-variant-dark);
    
    --md-sys-color-background: var(--md-sys-color-background-dark);
    --md-sys-color-on-background: var(--md-sys-color-on-background-dark);
    
    --md-sys-color-error: var(--md-sys-color-error-dark);
    --md-sys-color-on-error: var(--md-sys-color-on-error-dark);
    
    --md-sys-color-shadow: var(--md-sys-color-shadow-dark);
    --md-sys-color-scrim: var(--md-sys-color-scrim-dark);
    
    color-scheme: dark;
  }
}

/* ============================================
   TOP NAVIGATION MENU
   ============================================ */
.top-navigation {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: linear-gradient(
    to bottom, 
    var(--md-sys-color-surface-container) 0%,
    var(--md-sys-color-surface-dim) 70%,
    rgba(0, 0, 0, 0.1) 100%
  );
  box-shadow: var(--md-sys-elevation-2);
  transition: background 0.3s ease, box-shadow 0.3s ease;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height, 72px);
}

.nav-left-section {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-brand {
  display: flex;
  align-items: center;
}

.nav-logo-link {
  text-decoration: none;
  color: inherit;
}

.nav-title {
  font-family: 'Montserrat', sans-serif;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 1.5px;
  background: linear-gradient(90deg, #e50914, #be6d02, #d1d804dd);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  background-size: 200% 100%;
  animation: nav-shine 5s linear infinite;
  margin: 0;
  cursor: pointer;
  user-select: none;
  transition: filter 0.3s ease;
}

@keyframes nav-shine {
  0% { background-position: 0%; }
  100% { background-position: 200%; }
}

.nav-title:hover {
  filter: drop-shadow(0 0 15px rgba(229, 9, 20, 0.5));
}

.nav-menu {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.nav-item {
  margin: 0;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  color: var(--md-sys-color-on-surface-variant);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  border-radius: 8px;
  transition: all 0.3s ease;
  position: relative;
}

.nav-link i {
  font-size: 16px;
}

.nav-link:hover {
  background: rgba(229, 9, 20, 0.15);
  color: var(--md-sys-color-on-surface);
}

.nav-link.active {
  background: rgba(229, 9, 20, 0.25);
  color: var(--md-sys-color-on-surface);
  font-weight: 600;
}

.nav-link.active::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 2px;
  background: linear-gradient(90deg, #e50914, #be6d02);
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-icon-button {
  width: 40px;
  height: 40px;
  border: none;
  background: rgba(255, 255, 255, 0.1);
  color: var(--md-sys-color-on-surface);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 18px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(5px);
}

.nav-icon-button:hover {
  background: rgba(229, 9, 20, 0.2);
  border-color: #e50914;
  transform: scale(1.05);
  box-shadow: 0 0 15px rgba(229, 9, 20, 0.3);
}

.nav-icon-button:active {
  transform: scale(0.95);
}

/* Hamburger Menu Button */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.nav-hamburger span {
  display: block;
  width: 25px;
  height: 3px;
  background: var(--md-sys-color-on-surface);
  border-radius: 3px;
  transition: all 0.3s ease;
}

.nav-hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.nav-hamburger.active span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* Mobile Styles */
@media (max-width: 768px) {
  .nav-container {
    padding: 0 20px;
    height: var(--nav-height, 60px);
  }

  .nav-title {
    font-size: 22px;
  }

  .nav-hamburger {
    display: flex;
  }

  .nav-left-section {
    gap: 12px;
  }

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: linear-gradient(
      to bottom,
      var(--md-sys-color-surface-container) 0%,
      var(--md-sys-color-surface-dim) 100%
    );
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 0;
    box-shadow: var(--md-sys-elevation-4);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.3s ease, opacity 0.3s ease, padding 0.3s ease;
    border-top: 1px solid var(--md-sys-color-outline-variant);
  }

  .nav-menu.active {
    max-height: 400px;
    opacity: 1;
    padding: 10px 0;
  }

  .nav-item {
    width: 100%;
  }

  .nav-link {
    padding: 14px 20px;
    border-radius: 0;
    width: 100%;
    justify-content: flex-start;
  }

  .nav-link.active::before {
    left: 0;
    transform: none;
    width: 4px;
    height: 100%;
    top: 0;
    border-radius: 0;
  }


  .nav-icon-button {
    width: 38px;
    height: 38px;
    font-size: 16px;
  }
}

@media (max-width: 480px) {
  .nav-container {
    padding: 0 15px;
    height: var(--nav-height, 56px);
  }

  .nav-title {
    font-size: 20px;
  }
}