/* ==========================================================================
   VideoHub - Futuristic 3D Glassmorphism Stylesheet
   Pure CSS3 - Zero External Frameworks
   ========================================================================== */

/* --- Custom Variables & Theme Tokens --- */
:root {
  /* Dark Theme (Default) */
  --bg-primary: #0a0b12;
  --bg-secondary: #121422;
  --bg-tertiary: #191c30;
  
  --glass-bg: rgba(23, 26, 43, 0.65);
  --glass-bg-hover: rgba(32, 36, 61, 0.75);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-glow: rgba(99, 102, 241, 0.4);
  --glass-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--glass-border);
  --glass-shadow-hover: 0 30px 60px rgba(0, 0, 0, 0.6), 0 0 25px rgba(99, 102, 241, 0.35);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  --accent-primary: #6366f1;
  --accent-secondary: #a855f7;
  --accent-tertiary: #ec4899;
  --accent-cyan: #06b6d4;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --accent-gradient-hover: linear-gradient(135deg, #4f46e5 0%, #9333ea 50%, #db2777 100%);

  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;

  --blob-1: rgba(99, 102, 241, 0.25);
  --blob-2: rgba(236, 72, 153, 0.2);
  --blob-3: rgba(6, 182, 212, 0.2);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-primary: #f1f5f9;
  --bg-secondary: #e2e8f0;
  --bg-tertiary: #ffffff;

  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-bg-hover: rgba(255, 255, 255, 0.9);
  --glass-border: rgba(255, 255, 255, 0.8);
  --glass-border-glow: rgba(99, 102, 241, 0.4);
  --glass-shadow: 0 15px 35px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.05);
  --glass-shadow-hover: 0 25px 45px rgba(99, 102, 241, 0.2), 0 0 20px rgba(99, 102, 241, 0.2);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;

  --blob-1: rgba(99, 102, 241, 0.15);
  --blob-2: rgba(236, 72, 153, 0.12);
  --blob-3: rgba(6, 182, 212, 0.12);
}

/* --- Base & Reset --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

button, input {
  font-family: inherit;
  border: none;
  outline: none;
}

button {
  cursor: pointer;
}

/* --- Background Ambient Canvas & Floating 3D Blobs --- */
.ambient-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.ambient-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.6;
  animation: floatOrb 20s infinite alternate ease-in-out;
}

.blob-1 {
  width: 500px;
  height: 500px;
  background: var(--blob-1);
  top: -100px;
  left: -100px;
  animation-duration: 22s;
}

.blob-2 {
  width: 600px;
  height: 600px;
  background: var(--blob-2);
  top: 40%;
  right: -150px;
  animation-duration: 28s;
  animation-delay: -5s;
}

.blob-3 {
  width: 450px;
  height: 450px;
  background: var(--blob-3);
  bottom: -50px;
  left: 30%;
  animation-duration: 25s;
  animation-delay: -10s;
}

@keyframes floatOrb {
  0% {
    transform: translate(0, 0) scale(1) rotate(0deg);
  }
  50% {
    transform: translate(80px, 60px) scale(1.15) rotate(90deg);
  }
  100% {
    transform: translate(-50px, 90px) scale(0.9) rotate(180deg);
  }
}

/* Subtle Grid Texture */
.ambient-grid {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(circle at 50% 30%, black 40%, transparent 80%);
}

/* --- Container & Layout --- */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* --- Header & Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: var(--glass-bg);
  border-bottom: 1px solid var(--glass-border);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  transition: transform var(--transition-fast);
}

.brand-logo:hover {
  transform: scale(1.03);
}

.logo-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.5);
}

.logo-text span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-secondary);
  position: relative;
  padding: 0.5rem 0;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--accent-gradient);
  transition: width var(--transition-fast);
  border-radius: var(--radius-full);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  box-shadow: var(--glass-shadow);
}

.theme-toggle-btn:hover {
  transform: rotate(15deg) scale(1.08);
  border-color: var(--accent-primary);
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.theme-icon-sun {
  display: none;
}
[data-theme="light"] .theme-icon-sun {
  display: block;
}
[data-theme="light"] .theme-icon-moon {
  display: none;
}

/* Mobile Hamburger Toggle */
.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 8px;
  color: var(--text-primary);
}

.hamburger-btn span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: currentColor;
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.hamburger-btn.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger-btn.open span:nth-child(2) {
  opacity: 0;
}
.hamburger-btn.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Hero Section --- */
.hero-section {
  padding: 5rem 0 3rem;
  text-align: center;
  position: relative;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.3);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: 1.5rem;
  backdrop-filter: blur(8px);
}

.hero-pill-badge .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-primary);
  box-shadow: 0 0 10px var(--accent-primary);
  animation: pulseGlow 1.8s infinite;
}

@keyframes pulseGlow {
  0% { transform: scale(0.9); opacity: 0.7; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.7; }
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 1.25rem;
}

.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto 2.5rem;
  font-weight: 400;
}

/* --- Futuristic 3D Search Bar --- */
.search-container {
  max-width: 780px;
  margin: 0 auto 2rem;
  position: relative;
}

.search-box-glass {
  display: flex;
  align-items: center;
  background: var(--glass-bg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  padding: 0.5rem 0.6rem 0.5rem 1.4rem;
  box-shadow: var(--glass-shadow);
  transition: all var(--transition-normal);
  position: relative;
  z-index: 2;
}

.search-box-glass:focus-within {
  border-color: var(--accent-primary);
  box-shadow: 0 0 35px rgba(99, 102, 241, 0.4), 0 20px 40px rgba(0,0,0,0.4);
  transform: translateY(-2px);
}

.search-icon-prefix {
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 0.75rem;
}

.search-input {
  flex: 1;
  background: transparent;
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 400;
  min-width: 150px;
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-actions-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-paste {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.btn-paste:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-primary);
}

.btn-search {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.8rem;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  color: #ffffff;
  font-weight: 600;
  font-size: 1rem;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
  transition: all var(--transition-fast);
}

.btn-search:hover {
  background: var(--accent-gradient-hover);
  transform: scale(1.03);
  box-shadow: 0 6px 25px rgba(236, 72, 153, 0.45);
}

.btn-search:active {
  transform: scale(0.98);
}

.hero-supported-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.supported-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.75rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.supported-chip:hover {
  border-color: var(--accent-primary);
  color: var(--text-primary);
  transform: translateY(-2px);
}

/* --- 3D Platform Cards Section --- */
.section {
  padding: 4.5rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3.5rem;
}

.section-tag {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent-primary);
  margin-bottom: 0.5rem;
  display: block;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 0.85rem;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* 3D Perspective Grid */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.75rem;
  perspective: 1200px;
}

/* 3D Platform Card Container */
.card-3d-wrapper {
  position: relative;
  transform-style: preserve-3d;
  will-change: transform;
}

.card-3d {
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.6rem;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--glass-shadow);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  transform-style: preserve-3d;
  overflow: hidden;
}

/* Interactive Glare / Specular Layer */
.card-glare {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  background: radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.15), transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-fast);
  border-radius: inherit;
}

.card-3d-wrapper:hover .card-glare {
  opacity: 1;
}

.card-3d-wrapper:hover .card-3d {
  border-color: var(--card-glow, var(--glass-border-glow));
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4), 0 0 30px var(--card-glow, rgba(99, 102, 241, 0.3));
}

.platform-icon-wrap {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--card-gradient, var(--accent-gradient));
  color: #ffffff;
  margin-bottom: 1.25rem;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
  transform: translateZ(35px);
  transition: transform var(--transition-fast);
}

.card-3d-wrapper:hover .platform-icon-wrap {
  transform: translateZ(50px) scale(1.08);
}

.platform-card-info {
  transform: translateZ(25px);
  margin-bottom: 1.5rem;
}

.platform-name {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: var(--text-primary);
}

.platform-tagline {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--card-color, var(--accent-primary));
  margin-bottom: 0.6rem;
}

.platform-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

.platform-btn-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0.75rem 1.2rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  transform: translateZ(30px);
  transition: all var(--transition-fast);
}

.platform-btn-arrow svg {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-fast);
}

.card-3d-wrapper:hover .platform-btn-arrow {
  background: var(--card-gradient, var(--accent-gradient));
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.card-3d-wrapper:hover .platform-btn-arrow svg {
  transform: translateX(4px);
}

/* --- Features / Value Props Section --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 2.2rem 1.8rem;
  box-shadow: var(--glass-shadow);
  transition: all var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--glass-border-glow);
  box-shadow: var(--glass-shadow-hover);
}

.feature-icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

/* --- How It Works Section --- */
.steps-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  position: relative;
}

.step-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 2.2rem 1.8rem;
  position: relative;
  box-shadow: var(--glass-shadow);
}

.step-number {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  font-size: 2.5rem;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.05);
  line-height: 1;
}

[data-theme="light"] .step-number {
  color: rgba(0, 0, 0, 0.06);
}

.step-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent-gradient);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.step-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.step-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* --- Search History UI --- */
.history-section {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  margin-top: 3rem;
  box-shadow: var(--glass-shadow);
}

.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.history-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.history-title-wrap h3 {
  font-size: 1.3rem;
  font-weight: 700;
}

.history-clear-btn {
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-full);
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: var(--danger);
  font-size: 0.82rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.history-clear-btn:hover {
  background: var(--danger);
  color: #ffffff;
}

.history-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.history-item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.9rem 1.1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-align: left;
}

.history-item:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.history-item-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(99, 102, 241, 0.2);
  color: var(--accent-primary);
  flex-shrink: 0;
}

.history-item-info {
  flex: 1;
  overflow: hidden;
}

.history-item-title {
  font-size: 0.88rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-primary);
}

.history-item-meta {
  font-size: 0.76rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.history-empty-state {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* --- FAQ Accordion Section --- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--glass-border-glow);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  background: transparent;
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 600;
  text-align: left;
}

.faq-chevron {
  width: 20px;
  height: 20px;
  color: var(--accent-primary);
  transition: transform var(--transition-normal);
  flex-shrink: 0;
}

.faq-item.active .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 1.5rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  transition: max-height var(--transition-normal), padding var(--transition-normal);
}

.faq-item.active .faq-answer {
  max-height: 250px;
  padding: 0 1.5rem 1.25rem 1.5rem;
}

/* ==========================================================================
   DOWNLOADER PAGE SPECIFIC STYLES
   ========================================================================== */
.downloader-hero {
  padding: 3.5rem 0 2rem;
  text-align: center;
}

.downloader-badge-wrap {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.6rem 1.4rem;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  margin-bottom: 1.5rem;
  box-shadow: var(--glass-shadow);
}

.platform-badge-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--platform-accent, var(--accent-gradient));
  color: #ffffff;
}

.platform-badge-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.downloader-title {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 0.75rem;
}

.downloader-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto 2.5rem;
}

/* Quick Platform Switcher Bar */
.platform-switcher {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 2.5rem;
}

.platform-tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.platform-tab-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

.platform-tab-btn.active {
  background: var(--platform-accent, var(--accent-gradient));
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

/* --- Processing & Loading States --- */
.loading-card {
  display: none;
  background: var(--glass-bg);
  backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border-glow);
  border-radius: var(--radius-xl);
  padding: 3.5rem 2rem;
  text-align: center;
  max-width: 600px;
  margin: 2rem auto;
  box-shadow: var(--glass-shadow-hover);
  animation: fadeIn 0.4s ease-out;
}

.loading-card.active {
  display: block;
}

.spinner-3d {
  position: relative;
  width: 70px;
  height: 70px;
  margin: 0 auto 1.5rem;
}

.spinner-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 3px solid transparent;
  border-top-color: var(--accent-primary);
  border-bottom-color: var(--accent-tertiary);
  animation: spinRing 1.2s cubic-bezier(0.68, -0.55, 0.27, 1.55) infinite;
}

.spinner-ring:nth-child(2) {
  inset: 8px;
  border-top-color: var(--accent-cyan);
  border-bottom-color: var(--accent-secondary);
  animation: spinRing 1.8s linear infinite reverse;
}

@keyframes spinRing {
  0% { transform: rotate(0deg) scale(0.95); }
  50% { transform: rotate(180deg) scale(1.05); }
  100% { transform: rotate(360deg) scale(0.95); }
}

.loading-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.loading-step-msg {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  min-height: 1.5em;
}

.loading-progress-bar {
  width: 100%;
  max-width: 320px;
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  margin: 0 auto;
  overflow: hidden;
  position: relative;
}

.loading-progress-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 40%;
  background: var(--accent-gradient);
  border-radius: inherit;
  animation: loadingSlide 1.5s infinite ease-in-out;
}

@keyframes loadingSlide {
  0% { left: -40%; width: 30%; }
  50% { left: 40%; width: 50%; }
  100% { left: 100%; width: 30%; }
}

/* --- Video Information Result Card --- */
.result-card {
  display: none;
  background: var(--glass-bg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  max-width: 900px;
  margin: 2.5rem auto;
  box-shadow: var(--glass-shadow);
  animation: slideUpFade 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.result-card.active {
  display: block;
}

@keyframes slideUpFade {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result-media-header {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 1.75rem;
  margin-bottom: 2.25rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--glass-border);
}

.result-thumbnail-wrap {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: #000;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

.result-thumbnail {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.result-duration-badge {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(4px);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
  color: #ffffff;
}

.result-details {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.result-platform-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.08);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  align-self: flex-start;
}

.result-title {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.result-meta-list {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.result-meta-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

/* Format Quality Selection Tables */
.formats-section {
  margin-bottom: 2rem;
}

.formats-section-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-primary);
}

.formats-table-wrap {
  background: rgba(0, 0, 0, 0.15);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.formats-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.formats-table th {
  background: rgba(255, 255, 255, 0.03);
  padding: 0.85rem 1.25rem;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--glass-border);
}

.formats-table td {
  padding: 1rem 1.25rem;
  font-size: 0.92rem;
  border-bottom: 1px solid var(--glass-border);
  vertical-align: middle;
}

.formats-table tr:last-child td {
  border-bottom: none;
}

.formats-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.quality-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
  font-weight: 700;
  font-size: 0.82rem;
  color: var(--accent-primary);
}

.format-ext-badge {
  text-transform: uppercase;
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.file-size-text {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.btn-download-format {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  color: #ffffff;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-download-format:hover {
  transform: scale(1.04);
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-download-format.loading {
  opacity: 0.75;
  pointer-events: none;
}

/* --- Toast Notifications System --- */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  pointer-events: none;
  max-width: 380px;
  width: calc(100% - 4rem);
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 1rem 1.25rem;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  animation: toastSlideIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.toast.toast-error {
  border-color: rgba(239, 68, 68, 0.5);
}
.toast.toast-success {
  border-color: rgba(16, 185, 129, 0.5);
}
.toast.toast-warning {
  border-color: rgba(245, 158, 11, 0.5);
}
.toast.toast-info {
  border-color: rgba(59, 130, 246, 0.5);
}

.toast-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  margin-top: 2px;
}

.toast-error .toast-icon { color: var(--danger); }
.toast-success .toast-icon { color: var(--success); }
.toast-warning .toast-icon { color: var(--warning); }
.toast-info .toast-icon { color: var(--info); }

.toast-content {
  flex: 1;
}

.toast-title {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
  color: var(--text-primary);
}

.toast-message {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.toast-close-btn {
  background: transparent;
  color: var(--text-muted);
  padding: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast);
}

.toast-close-btn:hover {
  color: var(--text-primary);
}

.toast-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  width: 100%;
  background: var(--accent-gradient);
  animation: toastTimer linear forwards;
}

@keyframes toastSlideIn {
  from {
    transform: translateX(100%) scale(0.9);
    opacity: 0;
  }
  to {
    transform: translateX(0) scale(1);
  }
}

/* --- Footer --- */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--glass-border);
  padding: 4.5rem 0 2rem;
  margin-top: 5rem;
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin: 1rem 0 1.5rem;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent-primary);
  transform: translateX(3px);
}

.footer-disclaimer-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--glass-border);
  color: var(--text-muted);
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Modal / Demo Badge Notice */
.demo-banner {
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-md);
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.demo-banner strong {
  color: var(--text-primary);
}

/* In-Page Embedded Download Stream Box */
.download-stream-box {
  display: none;
  background: rgba(99, 102, 241, 0.08);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--accent-primary);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-top: 1.5rem;
  box-shadow: 0 15px 35px rgba(99, 102, 241, 0.25);
  animation: slideUpFade 0.4s ease-out;
  text-align: center;
}

.download-stream-box.active {
  display: block;
}

.stream-box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.stream-box-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-primary);
}

.stream-pulse-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-primary);
  box-shadow: 0 0 12px var(--accent-primary);
  animation: pulseGlow 1.5s infinite;
}

.stream-box-close-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--glass-border);
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  transition: all var(--transition-fast);
}

.stream-box-close-btn:hover {
  color: #ffffff;
  background: var(--danger);
  border-color: transparent;
}

.stream-box-hint {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.stream-box-iframe-wrap {
  width: 100%;
  max-width: 500px;
  height: 75px;
  margin: 0 auto;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.stream-iframe {
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}