/* ==========================================================================
   BACKDROP FILTER CSS - Demo específico
   Efectos Glassmorphism y filtros visuales
   Colores: #2448A6 (azul) y #F5B841 (dorado)
   ========================================================================== */

/* ==========================================================================
   PARTE 1: HEADER, NAV Y COMPONENTES REUTILIZABLES
   ========================================================================== */

.demo-header {
  background: var(--background);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: var(--spacing-lg) 0;
}

.demo-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-lg);
}

.back-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-fast);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  border: 1px solid transparent;
}

.back-link:hover {
  color: var(--primary-color);
  background: color-mix(in srgb, var(--primary-color) 8%, transparent);
  border-color: var(--primary-color);
  transform: translateX(-2px);
}

.back-link svg {
  transition: transform var(--transition-fast);
}

.back-link:hover svg {
  transform: translateX(-2px);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.brand-logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-logo img {
  width: 60px;
  height: 60px;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px color-mix(in srgb, var(--primary-color) 20%, transparent));
  transition: transform var(--transition-normal);
}

.brand-logo:hover img {
  transform: scale(1.05);
}

.brand-name {
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--font-size-base);
}

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

.theme-toggle {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--surface);
  border: 2px solid var(--border-color);
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition-normal);
  overflow: hidden;
  flex-shrink: 0;
}

.theme-toggle:hover {
  background: var(--primary-color);
  border-color: var(--primary-color);
  transform: scale(1.05);
  box-shadow: 0 8px 25px color-mix(in srgb, var(--primary-color) 30%, transparent);
}

.theme-toggle:hover .theme-toggle__icon {
  color: var(--brand-white);
}

.theme-toggle__icon {
  position: absolute;
  width: 18px;
  height: 18px;
  color: var(--text-primary);
  transition: all var(--transition-normal);
}

:root[data-theme="light"] .theme-toggle__icon--sun,
:root:not([data-theme]) .theme-toggle__icon--sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

:root[data-theme="light"] .theme-toggle__icon--moon,
:root:not([data-theme]) .theme-toggle__icon--moon {
  opacity: 0;
  transform: rotate(180deg) scale(0.5);
}

:root[data-theme="dark"] .theme-toggle__icon--sun {
  opacity: 0;
  transform: rotate(-180deg) scale(0.5);
}

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

/* ==========================================================================
   SECTION TITLES
   ========================================================================== */

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  text-align: center;
  position: relative;
  padding-bottom: var(--spacing-md);
}

.section-title::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  border-radius: 2px;
}

.section-subtitle {
  display: block;
  font-size: var(--font-size-base);
  font-weight: 400;
  color: var(--text-secondary);
  margin-top: var(--spacing-sm);
}

/* ==========================================================================
   PARTE 2: HERO SECTION CON GLASSMORPHISM
   ========================================================================== */

.hero-glass {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: var(--spacing-3xl) 0;
}

/* Fondo con orbs de colores */
.hero-glass__background {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--primary-color) 15%, var(--background)) 0%,
    var(--background) 50%,
    color-mix(in srgb, var(--secondary-color) 10%, var(--background)) 100%
  );
  z-index: 0;
}

.hero-glass__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.6;
  pointer-events: none;
}

.hero-glass__orb--1 {
  width: 400px;
  height: 400px;
  background: var(--primary-color);
  top: -10%;
  left: -5%;
  opacity: 0.4;
}

.hero-glass__orb--2 {
  width: 300px;
  height: 300px;
  background: var(--secondary-color);
  top: 20%;
  right: -5%;
  opacity: 0.5;
}

.hero-glass__orb--3 {
  width: 250px;
  height: 250px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  bottom: -5%;
  left: 30%;
  opacity: 0.4;
}

/* Hero Content con efecto glass */
.hero-glass__content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  padding: var(--spacing-3xl);
  
  /* Glassmorphism */
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: color-mix(in srgb, var(--surface) 60%, transparent);
  border: 1px solid color-mix(in srgb, var(--border-color) 50%, transparent);
  border-radius: var(--border-radius-large);
  box-shadow: 
    0 8px 32px color-mix(in srgb, var(--primary-color) 10%, transparent),
    inset 0 0 0 1px color-mix(in srgb, var(--brand-white) 10%, transparent);
}

/* Badge */
.demo-hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.badge-text {
  font-size: var(--font-size-sm);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.badge-tag {
  background: var(--secondary-color);
  color: var(--text-primary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
}

/* Title */
.demo-hero__title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.1;
}

.title-highlight {
  display: block;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 900;
  margin-top: var(--spacing-sm);
}

/* Description */
.demo-hero__description {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-2xl);
}

/* Features */
.demo-hero__features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--spacing-md);
}

.feature-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: color-mix(in srgb, var(--surface) 50%, transparent);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.feature-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px color-mix(in srgb, var(--primary-color) 15%, transparent);
  border-color: var(--primary-color);
}

.feature-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.feature-text {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  text-align: left;
}

.feature-text strong {
  color: var(--text-primary);
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.feature-text span {
  color: var(--text-muted);
  font-size: var(--font-size-xs);
}

/* ==========================================================================
   PARTE 3: PLAYGROUND SECTION
   ========================================================================== */

.demo-main {
  padding-bottom: var(--spacing-3xl);
}

.playground-section {
  padding: var(--spacing-3xl) 0;
}

.playground-container {
  display: grid;
  grid-template-columns: 350px 1fr;
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

/* ==========================================================================
   PLAYGROUND CONTROLS
   ========================================================================== */

.playground-controls {
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-xl);
  position: sticky;
  top: calc(var(--spacing-3xl) + 80px);
  align-self: start;
  max-height: calc(100vh - 150px);
  overflow-y: auto;
}

.controls-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--border-color);
}

.control-group {
  margin-bottom: var(--spacing-xl);
}

.control-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.label-text {
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', monospace;
}

.label-value {
  font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', monospace;
  font-size: var(--font-size-sm);
  color: var(--primary-color);
  font-weight: 600;
  background: color-mix(in srgb, var(--primary-color) 10%, transparent);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
}

.control-description {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
  margin-bottom: 0;
}

/* Filter Slider */
.filter-slider {
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: var(--border-color);
  outline: none;
  cursor: pointer;
  -webkit-appearance: none;
}

.filter-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 8px color-mix(in srgb, var(--primary-color) 40%, transparent);
}

.filter-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--primary-color) 50%, transparent);
}

.filter-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
}

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

/* Generated Code */
.generated-code {
  background: var(--background);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', monospace;
  font-size: var(--font-size-xs);
  color: var(--text-primary);
  overflow-x: auto;
  margin: 0;
  line-height: 1.6;
}

.generated-code code {
  background: none;
  padding: 0;
}

/* Copy Button */
.copy-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--primary-color);
  color: var(--brand-white);
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  background: var(--primary-dark);
  transform: scale(1.05);
}

.copy-btn:active {
  transform: scale(0.95);
}

/* Preset Buttons */
.preset-buttons {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-sm);
}

.preset-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--background);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
}

.preset-btn:hover {
  border-color: var(--primary-color);
  background: color-mix(in srgb, var(--primary-color) 8%, var(--background));
  transform: translateY(-2px);
}

.preset-btn:active {
  transform: translateY(0);
}

/* ==========================================================================
   PLAYGROUND PREVIEW
   ========================================================================== */

.playground-preview {
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-xl);
}

.preview-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--border-color);
}

.preview-area {
  position: relative;
  min-height: 400px;
  border-radius: var(--border-radius-large);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Preview Background with Orbs */
.preview-background {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    #667eea 0%,
    #764ba2 25%,
    #f093fb 50%,
    #f5576c 75%,
    #4facfe 100%
  );
}

.preview-orb {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.preview-orb--1 {
  width: 200px;
  height: 200px;
  background: #ff6b6b;
  top: -50px;
  left: -50px;
  opacity: 0.8;
}

.preview-orb--2 {
  width: 150px;
  height: 150px;
  background: #4ecdc4;
  top: 50%;
  right: -30px;
  opacity: 0.8;
}

.preview-orb--3 {
  width: 180px;
  height: 180px;
  background: #ffe66d;
  bottom: -40px;
  left: 30%;
  opacity: 0.8;
}

.preview-orb--4 {
  width: 120px;
  height: 120px;
  background: #95e1d3;
  top: 20%;
  left: 20%;
  opacity: 0.7;
}

/* Preview Card */
.preview-card {
  position: relative;
  z-index: 2;
  width: 90%;
  max-width: 400px;
  padding: var(--spacing-2xl);
  
  /* Default glassmorphism - will be updated by JS */
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.2);
  
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--border-radius-large);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  
  transition: backdrop-filter 0.3s ease, background 0.3s ease;
  contain: layout paint;
}

.preview-card__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--brand-white);
  margin-bottom: var(--spacing-md);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.preview-card__text {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.preview-card__footer {
  display: flex;
  gap: var(--spacing-sm);
}

.preview-card__tag {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--border-radius);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--brand-white);
}

/* ==========================================================================
   PARTE 4: EFFECTS GALLERY
   ========================================================================== */

.effects-gallery {
  padding: var(--spacing-3xl) 0;
}

.effects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.effect-card {
  border-radius: var(--border-radius-large);
  overflow: hidden;
  transition: all var(--transition-normal);
  border: 1px solid var(--border-color);
}

.effect-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px color-mix(in srgb, var(--primary-color) 20%, transparent);
}

.effect-card__preview {
  position: relative;
  height: 180px;
  background: linear-gradient(135deg,
    #667eea 0%,
    #764ba2 50%,
    #f5576c 100%
  );
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.effect-card__content {
  padding: var(--spacing-xl);
  text-align: center;
  border-radius: var(--border-radius);
  margin: var(--spacing-md);
  
  /* Default - overridden per card */
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.effect-card__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--brand-white);
  margin-bottom: var(--spacing-xs);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.effect-card__desc {
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.85);
  margin: 0;
}

.effect-card__code {
  display: block;
  padding: var(--spacing-md);
  background: var(--surface);
  font-family: 'SF Mono', Monaco, monospace;
  font-size: var(--font-size-xs);
  color: var(--primary-color);
  text-align: center;
}

/* Individual Effect Styles */
.effect-card--glass .effect-card__content {
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.2);
}

.effect-card--frost .effect-card__content {
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(255, 255, 255, 0.3);
}

.effect-card--dark .effect-card__content {
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  background: rgba(0, 0, 0, 0.4);
}

.effect-card--vibrant .effect-card__content {
  backdrop-filter: blur(8px) saturate(180%);
  -webkit-backdrop-filter: blur(8px) saturate(180%);
  background: rgba(255, 255, 255, 0.15);
}

.effect-card--muted .effect-card__content {
  backdrop-filter: blur(12px) saturate(50%);
  -webkit-backdrop-filter: blur(12px) saturate(50%);
  background: rgba(255, 255, 255, 0.25);
}

.effect-card--bright .effect-card__content {
  backdrop-filter: blur(10px) brightness(120%);
  -webkit-backdrop-filter: blur(10px) brightness(120%);
  background: rgba(255, 255, 255, 0.2);
}

/* ==========================================================================
   PARTE 5: UI EXAMPLES
   ========================================================================== */

.ui-examples {
  padding: var(--spacing-3xl) 0;
}

.ui-example {
  margin-bottom: var(--spacing-3xl);
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-2xl);
}

.ui-example:last-child {
  margin-bottom: 0;
}

.ui-example__title {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.ui-example__icon {
  font-size: 1.5rem;
}

.ui-example__description {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  max-width: 600px;
}

.ui-example__demo {
  position: relative;
  border-radius: var(--border-radius-large);
  overflow: hidden;
  margin-bottom: var(--spacing-xl);
  min-height: 200px;
}

.ui-example__code {
  background: var(--background);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.ui-example__code pre {
  margin: 0;
  padding: var(--spacing-lg);
  overflow-x: auto;
}

.ui-example__code code {
  font-family: 'SF Mono', Monaco, monospace;
  font-size: var(--font-size-sm);
  line-height: 1.6;
  color: var(--text-primary);
}

/* ==========================================================================
   NAVBAR EXAMPLE
   ========================================================================== */

.ui-example__demo--navbar {
  height: 250px;
}

.demo-navbar-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    #667eea 0%,
    #764ba2 50%,
    #f5576c 100%
  );
}

.demo-navbar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-xl);
  
  /* Glassmorphism navbar */
  backdrop-filter: blur(10px) saturate(180%);
  -webkit-backdrop-filter: blur(10px) saturate(180%);
  background: rgba(255, 255, 255, 0.7);
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.demo-navbar__brand {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
}

.demo-navbar__menu {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.demo-navbar__link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.demo-navbar__link:hover {
  color: var(--primary-color);
}

/* ==========================================================================
   MODAL EXAMPLE
   ========================================================================== */

.ui-example__demo--modal {
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--background);
}

.demo-modal-content {
  position: absolute;
  inset: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  padding: var(--spacing-xl);
}

.demo-content-line {
  height: 16px;
  background: var(--border-color);
  border-radius: 4px;
}

.demo-content-line--short {
  width: 60%;
}

.demo-modal-overlay {
  position: absolute;
  inset: 0;
  
  /* Backdrop blur */
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  background: rgba(0, 0, 0, 0.5);
  
  display: flex;
  align-items: center;
  justify-content: center;
}

.demo-modal {
  background: rgba(255, 255, 255, 0.95);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-2xl);
  max-width: 320px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.demo-modal__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.demo-modal__text {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.demo-modal__actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
}

.demo-modal__btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
}

.demo-modal__btn--secondary {
  background: var(--surface);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.demo-modal__btn--secondary:hover {
  background: var(--border-color);
}

.demo-modal__btn--primary {
  background: var(--primary-color);
  color: var(--brand-white);
}

.demo-modal__btn--primary:hover {
  background: var(--primary-dark);
}

/* ==========================================================================
   CARDS EXAMPLE
   ========================================================================== */

.ui-example__demo--cards {
  height: 350px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.demo-cards-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    #0f0c29 0%,
    #302b63 50%,
    #24243e 100%
  );
}

.demo-cards-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  padding: var(--spacing-xl);
  width: 100%;
  max-width: 700px;
}

.demo-glass-card {
  padding: var(--spacing-xl);
  text-align: center;
  
  /* Glassmorphism */
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--border-radius-large);
  
  transition: all var(--transition-normal);
}

.demo-glass-card:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.2);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.demo-glass-card__icon {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
}

.demo-glass-card__title {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--brand-white);
  margin-bottom: var(--spacing-sm);
}

.demo-glass-card__text {
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.5;
  margin: 0;
}

/* ==========================================================================
   PARTE 6: COMPARISON SECTION
   ========================================================================== */

.comparison-section {
  padding: var(--spacing-3xl) 0;
}

.comparison-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

.comparison-column {
  background: var(--surface);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-2xl);
  transition: all var(--transition-normal);
}

.comparison-column--without {
  border-color: color-mix(in srgb, var(--error) 30%, var(--border-color));
}

.comparison-column--without:hover {
  border-color: var(--error);
}

.comparison-column--with {
  border-color: color-mix(in srgb, var(--success) 30%, var(--border-color));
}

.comparison-column--with:hover {
  border-color: var(--success);
}

.comparison-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--border-color);
}

.comparison-icon {
  font-size: 1.5rem;
}

.comparison-header h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.comparison-demo {
  position: relative;
  height: 200px;
  border-radius: var(--border-radius);
  overflow: hidden;
  margin-bottom: var(--spacing-xl);
}

.comparison-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    #667eea 0%,
    #764ba2 50%,
    #f5576c 100%
  );
}

.comparison-card {
  position: absolute;
  bottom: var(--spacing-lg);
  left: var(--spacing-lg);
  right: var(--spacing-lg);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
}

.comparison-card--solid {
  background: rgba(255, 255, 255, 0.95);
}

.comparison-card--glass {
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  background: rgba(255, 255, 255, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.comparison-card h4 {
  font-size: var(--font-size-base);
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
}

.comparison-card--solid h4 {
  color: var(--text-primary);
}

.comparison-card--glass h4 {
  color: var(--brand-white);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.comparison-card p {
  font-size: var(--font-size-xs);
  margin: 0;
}

.comparison-card--solid p {
  color: var(--text-secondary);
}

.comparison-card--glass p {
  color: rgba(255, 255, 255, 0.9);
}

.comparison-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.comparison-list li {
  padding: var(--spacing-sm) 0;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  padding-left: var(--spacing-lg);
  position: relative;
}

.comparison-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
}

/* ==========================================================================
   PARTE 7: TIPS, SUPPORT, CODE SECTIONS
   ========================================================================== */

.tips-section {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(180deg,
    var(--background) 0%,
    color-mix(in srgb, var(--primary-color) 3%, var(--background)) 100%
  );
}

.tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.tip-card {
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-2xl);
  position: relative;
  transition: all var(--transition-normal);
}

.tip-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.tip-number {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  font-size: var(--font-size-2xl);
  font-weight: 900;
  color: color-mix(in srgb, var(--primary-color) 15%, transparent);
}

.tip-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  padding-right: var(--spacing-2xl);
}

.tip-description {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
}

.tip-description code {
  background: var(--background);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: calc(var(--border-radius) / 2);
  font-size: var(--font-size-xs);
  color: var(--primary-color);
}

.tip-code {
  display: block;
  font-family: 'SF Mono', Monaco, monospace;
  font-size: var(--font-size-xs);
  color: var(--text-primary);
  background: var(--background);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  margin-bottom: var(--spacing-sm);
}

.tip-code:last-child {
  margin-bottom: 0;
}

/* Browser Support */
.support-section {
  padding: var(--spacing-3xl) 0;
}

.browser-support {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-2xl) 0;
}

.browser-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--surface);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
}

.browser-item--supported {
  border-color: color-mix(in srgb, var(--success) 30%, var(--border-color));
}

.browser-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.browser-icon {
  font-size: 1.5rem;
}

.browser-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.browser-info strong {
  color: var(--text-primary);
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.browser-info span {
  color: var(--text-secondary);
  font-size: var(--font-size-xs);
}

.support-note {
  background: color-mix(in srgb, var(--info) 8%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--info) 30%, transparent);
  border-left: 4px solid var(--info);
  border-radius: var(--border-radius);
  padding: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.support-note h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.code-content {
  background: var(--background);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  overflow-x: auto;
  margin: 0;
}

.code-content code {
  font-family: 'SF Mono', Monaco, monospace;
  font-size: var(--font-size-sm);
  line-height: 1.6;
  color: var(--text-primary);
}

/* Code Section */
.code-section {
  padding: var(--spacing-3xl) 0;
}

.code-examples {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

.code-block {
  background: var(--surface);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-large);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.code-block:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) var(--spacing-xl);
  background: color-mix(in srgb, var(--primary-color) 5%, var(--surface));
  border-bottom: 1px solid var(--border-color);
}

.code-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.code-lang {
  background: var(--primary-color);
  color: var(--brand-white);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */

.footer {
  background: var(--surface);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-2xl) 0;
  margin-top: var(--spacing-3xl);
}

.footer__content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-xl);
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.footer__logo img {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.footer__info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer__text {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin: 0;
}

.footer__author {
  color: var(--primary-color);
  font-weight: 600;
}

.footer__subtitle {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  margin: 0;
}

.footer__links {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.footer__link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--primary-color);
}

.footer__separator {
  color: var(--text-muted);
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */

@media (max-width: 1024px) {
  .playground-container {
    grid-template-columns: 1fr;
  }
  
  .playground-controls {
    position: relative;
    top: 0;
    max-height: none;
  }
  
  .demo-cards-grid {
    grid-template-columns: 1fr;
    max-width: 300px;
  }
}

@media (max-width: 768px) {
  .demo-nav {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .header-brand {
    position: static;
    transform: none;
  }
  
  .hero-glass {
    min-height: auto;
    padding: var(--spacing-2xl) 0;
  }
  
  .hero-glass__content {
    padding: var(--spacing-xl);
  }
  
  .demo-hero__title {
    font-size: var(--font-size-2xl);
  }
  
  .demo-hero__features {
    grid-template-columns: 1fr;
  }
  
  .effects-grid {
    grid-template-columns: 1fr;
  }
  
  .comparison-grid {
    grid-template-columns: 1fr;
  }
  
  .tips-grid {
    grid-template-columns: 1fr;
  }
  
  .demo-navbar__menu {
    gap: var(--spacing-md);
  }
  
  .demo-cards-grid {
    grid-template-columns: 1fr;
  }
  
  .footer__content {
    flex-direction: column;
    text-align: center;
  }
  
  .footer__brand {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .hero-glass__content {
    padding: var(--spacing-lg);
  }
  
  .demo-hero__title {
    font-size: var(--font-size-xl);
  }
  
  .section-title {
    font-size: var(--font-size-xl);
  }
  
  .preset-buttons {
    grid-template-columns: 1fr;
  }
  
  .ui-example {
    padding: var(--spacing-lg);
  }
  
  .comparison-demo {
    height: 180px;
  }
}

/* ==========================================================================
   DARK MODE
   ========================================================================== */

:root[data-theme="dark"] .hero-glass__content {
  background: color-mix(in srgb, var(--surface) 70%, transparent);
}

:root[data-theme="dark"] .preview-card {
  background: rgba(0, 0, 0, 0.3);
  border-color: rgba(255, 255, 255, 0.15);
}

:root[data-theme="dark"] .demo-navbar {
  background: rgba(0, 0, 0, 0.6);
  border-color: rgba(255, 255, 255, 0.1);
}

:root[data-theme="dark"] .demo-modal {
  background: rgba(30, 30, 30, 0.95);
}

:root[data-theme="dark"] .demo-modal__title {
  color: var(--text-primary);
}

:root[data-theme="dark"] .comparison-card--solid {
  background: rgba(30, 30, 30, 0.95);
}

:root[data-theme="dark"] .comparison-card--solid h4 {
  color: var(--text-primary);
}

:root[data-theme="dark"] .comparison-card--solid p {
  color: var(--text-secondary);
}

/* ==========================================================================
   REDUCED MOTION
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  .hero-glass__orb,
  .preview-orb {
    opacity: 0.3;
  }
  
  .feature-item,
  .effect-card,
  .tip-card,
  .code-block,
  .demo-glass-card {
    transition: none;
  }
  
  .feature-item:hover,
  .effect-card:hover,
  .tip-card:hover,
  .demo-glass-card:hover {
    transform: none;
  }
}

/* ==========================================================================
   PRINT
   ========================================================================== */

@media print {
  .demo-header,
  .theme-toggle,
  .back-link,
  .footer,
  .playground-section,
  .back-to-top {
    display: none !important;
  }
  
  .hero-glass {
    min-height: auto;
    padding: var(--spacing-xl) 0;
  }
  
  * {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
  }
}

/* ==========================================================================
   PERFORMANCE
   ========================================================================== */

.hero-glass__content,
.preview-card,
.effect-card__content,
.demo-navbar,
.demo-modal-overlay,
.demo-glass-card,
.comparison-card--glass {
  contain: layout paint;
}

.preview-area,
.effect-card__preview,
.ui-example__demo {
  contain: layout paint style;
}