/* ==========================================================================
   TubeKitPro - Ultra High-Speed YouTube All-in-One Media & Asset Downloader
   Target Domain: tubekitpro.online
   Production Modern CSS3 Design System
   ========================================================================== */

:root {
  --bg-primary: #080c15;
  --bg-secondary: #0e1424;
  --bg-card: rgba(18, 25, 44, 0.75);
  --bg-card-hover: rgba(25, 35, 62, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.035);
  --bg-glass-strong: rgba(255, 255, 255, 0.07);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(255, 23, 68, 0.6);
  --border-glow: rgba(255, 23, 68, 0.25);
  
  --accent-red: #ff0033;
  --accent-red-bright: #ff1744;
  --accent-red-glow: rgba(255, 0, 51, 0.4);
  --accent-cyan: #00f2fe;
  --accent-cyan-glow: rgba(0, 242, 254, 0.35);
  --accent-amber: #ffaa00;
  --accent-emerald: #00e676;
  --accent-purple: #7928ca;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-invert: #090d16;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 35px var(--accent-red-glow);
  
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 350ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background: 
    radial-gradient(circle at 15% 10%, rgba(255, 0, 51, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 25%, rgba(0, 242, 254, 0.06) 0%, transparent 45%),
    radial-gradient(circle at 50% 80%, rgba(121, 40, 202, 0.05) 0%, transparent 50%),
    var(--bg-primary);
  background-attachment: fixed;
}

img, svg, video {
  display: block;
  max-width: 100%;
}

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

button, input, select {
  font: inherit;
  border: none;
  outline: none;
  background: none;
}

/* Universal Accessible Focus Indicator */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
.tab-btn:focus-visible,
.btn-dl:focus-visible,
.btn-secondary:focus-visible,
.faq-question:focus-visible {
  outline: 2px solid var(--accent-cyan) !important;
  outline-offset: 3px !important;
  box-shadow: 0 0 14px var(--accent-cyan-glow) !important;
}

/* Screen Reader Accessible Utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.sr-only-focusable:focus {
  position: fixed;
  top: 16px;
  left: 16px;
  width: auto;
  height: auto;
  padding: 10px 18px;
  margin: 0;
  background: var(--bg-secondary);
  color: var(--accent-cyan);
  border: 2px solid var(--accent-cyan);
  border-radius: var(--radius-md);
  z-index: 9999;
  box-shadow: var(--shadow-lg);
  font-weight: 700;
  clip: auto;
}

/* Prefers Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

button {
  cursor: pointer;
  user-select: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --------------------------------------------------------------------------
   Header & Navbar
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(8, 12, 21, 0.85);
  border-bottom: 1px solid var(--border-subtle);
  transition: var(--transition-normal);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.logo-icon {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent-red) 0%, #b30024 100%);
  border-radius: 10px;
  box-shadow: 0 4px 15px var(--accent-red-glow);
  color: #fff;
  transition: transform var(--transition-normal);
}

.logo:hover .logo-icon {
  transform: scale(1.06) rotate(-3deg);
}

.logo-text span {
  background: linear-gradient(135deg, #fff 40%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-badge {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: linear-gradient(135deg, var(--accent-red) 0%, var(--accent-purple) 100%);
  color: #fff;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  margin-left: 4px;
  vertical-align: middle;
}

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

.network-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-subtle);
  padding: 6px 14px;
  border-radius: var(--radius-full);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.7; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.7; }
}

/* --------------------------------------------------------------------------
   Hero Section & Tab Switcher
   -------------------------------------------------------------------------- */
.hero {
  padding: 56px 0 24px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  background: rgba(255, 0, 51, 0.08);
  border: 1px solid rgba(255, 0, 51, 0.25);
  color: var(--accent-red-bright);
  font-size: 0.84rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.04em;
  margin-bottom: 16px;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #ffffff 20%, #cbd5e1 50%, var(--accent-red-bright) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

/* Tab Bar */
.tabs-wrapper {
  display: flex;
  justify-content: center;
  margin-bottom: 32px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding: 4px 8px;
}

.tabs-wrapper::-webkit-scrollbar {
  display: none;
}

.tabs-nav {
  display: inline-flex;
  background: var(--bg-secondary);
  padding: 6px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-md);
  max-width: 100%;
  flex-wrap: nowrap;
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  white-space: nowrap;
  flex-shrink: 0;
  min-height: 44px;
}

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

.tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-glass);
}

.tab-btn.active {
  color: #fff;
  background: linear-gradient(135deg, var(--accent-red) 0%, #b30024 100%);
  box-shadow: 0 4px 18px var(--accent-red-glow);
}

.tab-btn.active svg {
  transform: scale(1.1);
}

/* --------------------------------------------------------------------------
   Search & Input Box
   -------------------------------------------------------------------------- */
.search-container {
  max-width: 820px;
  margin: 0 auto 48px;
}

.search-box-wrap {
  position: relative;
  background: var(--bg-secondary);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 8px 8px 8px 20px;
  display: flex;
  align-items: center;
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255, 255, 255, 0.05);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.search-box-wrap:focus-within {
  border-color: var(--accent-red-bright);
  box-shadow: var(--shadow-lg), 0 0 25px var(--accent-red-glow);
}

.search-input-group {
  display: flex;
  align-items: center;
  flex: 1;
  min-width: 0;
}

.search-icon {
  color: var(--text-muted);
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  margin-right: 12px;
}

.search-input {
  flex: 1;
  min-width: 0;
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 500;
  background: transparent;
  width: 100%;
}

.search-input::placeholder {
  color: var(--text-muted);
  font-weight: 400;
}

.input-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.btn-paste, .btn-clear {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-subtle);
  transition: var(--transition-fast);
  min-height: 42px;
  cursor: pointer;
}

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

.btn-paste svg, .btn-clear svg {
  width: 15px;
  height: 15px;
}

.btn-submit {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--accent-red-bright) 0%, var(--accent-red) 100%);
  box-shadow: 0 4px 20px var(--accent-red-glow);
  transition: var(--transition-normal);
  min-height: 44px;
  cursor: pointer;
}

.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(255, 0, 51, 0.6);
}

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

.btn-submit svg {
  width: 18px;
  height: 18px;
}

.search-hints {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px 20px;
  margin-top: 14px;
  font-size: 0.84rem;
  color: var(--text-muted);
}
  font-size: 0.84rem;
  color: var(--text-muted);
}

.search-hints span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.search-hints svg {
  width: 14px;
  height: 14px;
  color: var(--accent-emerald);
}

/* --------------------------------------------------------------------------
   Loading Spinner & States
   -------------------------------------------------------------------------- */
.loading-indicator {
  display: none;
  text-align: center;
  padding: 48px 0;
}

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

.spinner {
  width: 52px;
  height: 52px;
  margin: 0 auto 20px;
  border: 4px solid var(--border-subtle);
  border-top-color: var(--accent-red-bright);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.loading-subtext {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   Results Section & Cards
   -------------------------------------------------------------------------- */
.results-container {
  display: none;
  max-width: 960px;
  margin: 0 auto 64px;
}

.results-container.active {
  display: block;
  animation: fadeIn 0.35s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.media-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-lg);
}

/* Media Header (Video/Audio/Shorts) */
.media-header {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 28px;
  margin-bottom: 32px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border-subtle);
}

.thumbnail-wrap {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  aspect-ratio: 16 / 9;
  background: #000;
}

.thumbnail-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.thumbnail-wrap:hover img {
  transform: scale(1.03);
}

.duration-badge {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0, 0, 0, 0.85);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  font-family: var(--font-mono);
  padding: 3px 8px;
  border-radius: 6px;
  letter-spacing: 0.03em;
}

.media-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.media-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-cyan);
  margin-bottom: 10px;
}

.media-title {
  font-size: 1.35rem;
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.media-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.meta-item svg {
  width: 16px;
  height: 16px;
  color: var(--accent-red-bright);
}

/* Streams Section & Tables */
.section-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-title svg {
  width: 20px;
  height: 20px;
  color: var(--accent-red-bright);
}

.streams-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0 10px;
}

.streams-table th {
  text-align: left;
  padding: 0 16px 8px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.stream-row {
  background: var(--bg-glass);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.stream-row:hover {
  background: var(--bg-card-hover);
  transform: translateY(-1px);
}

.stream-row td {
  padding: 14px 16px;
}

.stream-row td:first-child {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.stream-row td:last-child {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  text-align: right;
}

.quality-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 0.88rem;
}

.quality-pill {
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.pill-4k {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: #000;
}

.pill-1080p {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, #0088cc 100%);
  color: #000;
}

.pill-hd {
  background: rgba(0, 230, 118, 0.15);
  border: 1px solid rgba(0, 230, 118, 0.4);
  color: var(--accent-emerald);
}

.pill-sd {
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.format-tag {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.audio-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(0, 230, 118, 0.12);
  border: 1px solid rgba(0, 230, 118, 0.35);
  color: var(--accent-emerald);
  font-size: 0.74rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  margin-left: 6px;
  white-space: nowrap;
}

.filesize-tag {
  font-size: 0.84rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

/* Action Download Buttons */
.btn-dl {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--accent-red-bright) 0%, var(--accent-red) 100%);
  box-shadow: 0 2px 10px var(--accent-red-glow);
  transition: var(--transition-fast);
  cursor: pointer;
  border: none;
  min-width: 120px;
}

.btn-progress-fill {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 0%;
  background: rgba(0, 230, 118, 0.45);
  transition: width 0.25s ease-out;
  pointer-events: none;
  z-index: 1;
}

.btn-content {
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  pointer-events: none;
}

.btn-dl:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(255, 0, 51, 0.5);
}

.btn-dl svg {
  width: 15px;
  height: 15px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-subtle);
  transition: var(--transition-fast);
}

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

/* --------------------------------------------------------------------------
   Shorts Special Display (Vertical 9:16)
   -------------------------------------------------------------------------- */
.shorts-container {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 32px;
  align-items: center;
}

.shorts-preview-card {
  position: relative;
  aspect-ratio: 9 / 16;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg), 0 0 30px rgba(255, 0, 51, 0.2);
  background: #000;
}

.shorts-preview-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.shorts-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-red);
  color: #fff;
  font-size: 0.76rem;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
}

.shorts-actions {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.shorts-download-banner {
  background: linear-gradient(135deg, rgba(255, 0, 51, 0.12) 0%, rgba(0, 242, 254, 0.08) 100%);
  border: 1px solid rgba(255, 0, 51, 0.3);
  border-radius: var(--radius-md);
  padding: 24px;
}

.shorts-download-banner h4 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: #fff;
}

.shorts-download-banner p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.5;
  margin-bottom: 20px;
}

.shorts-btn-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   Audio Extractor & Bitrate Selectors
   -------------------------------------------------------------------------- */
.audio-customizer {
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 28px;
}

.audio-row-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.bitrate-selector {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.bitrate-btn {
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-subtle);
  transition: var(--transition-fast);
}

.bitrate-btn:hover {
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

.bitrate-btn.active {
  color: #000;
  background: var(--accent-cyan);
  border-color: var(--accent-cyan);
  box-shadow: 0 2px 12px var(--accent-cyan-glow);
}

.format-selector {
  display: flex;
  gap: 8px;
}

.format-btn {
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  background: var(--bg-glass-strong);
  border: 1px solid var(--border-subtle);
  transition: var(--transition-fast);
}

.format-btn.active {
  color: #fff;
  background: var(--accent-purple);
  border-color: var(--accent-purple);
}

/* --------------------------------------------------------------------------
   Thumbnail Gallery Grid (Module 4)
   -------------------------------------------------------------------------- */
.thumbnail-gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.thumb-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-fast);
  display: flex;
  flex-direction: column;
}

.thumb-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.16);
  transform: translateY(-2px);
}

.thumb-img-wrap {
  aspect-ratio: 16 / 9;
  background: #000;
  overflow: hidden;
  position: relative;
}

.thumb-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.thumb-card:hover .thumb-img-wrap img {
  transform: scale(1.04);
}

.thumb-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.thumb-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.thumb-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.thumb-dim {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.1);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.thumb-actions {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  margin-top: auto;
}

/* --------------------------------------------------------------------------
   Channel Logo & Banner Downloader (Module 5)
   -------------------------------------------------------------------------- */
.channel-profile-card {
  margin-bottom: 32px;
}

.channel-hero-banner {
  position: relative;
  width: 100%;
  height: 220px;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  overflow: hidden;
  background: #000;
}

.channel-hero-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.channel-profile-body {
  position: relative;
  padding: 0 24px 24px;
  margin-top: -50px;
}

.channel-avatar-row {
  display: flex;
  align-items: flex-end;
  gap: 20px;
  margin-bottom: 16px;
}

.channel-avatar-img {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  border: 4px solid var(--bg-card);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: #000;
  flex-shrink: 0;
}

.channel-avatar-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.channel-titles {
  padding-bottom: 8px;
}

.channel-name {
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
}

.verified-icon {
  width: 20px;
  height: 20px;
  color: var(--accent-cyan);
}

.channel-handle {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent-red-bright);
}

.channel-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 800px;
}

.asset-block-title {
  font-size: 1.15rem;
  font-weight: 800;
  margin: 32px 0 16px;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
}

.asset-block-title svg {
  width: 20px;
  height: 20px;
  color: var(--accent-red-bright);
}

.channel-assets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.asset-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: var(--transition-fast);
}

.asset-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.16);
  transform: translateY(-2px);
}

.asset-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.asset-label {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
}

.asset-dim {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-emerald);
  background: rgba(0, 230, 118, 0.12);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.asset-desc {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.45;
  margin-bottom: 16px;
}

/* --------------------------------------------------------------------------
   SEO Content & Technical Showcase
   -------------------------------------------------------------------------- */
.seo-section {
  padding: 64px 0;
  border-top: 1px solid var(--border-subtle);
}

.section-badge {
  text-align: center;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-cyan);
  margin-bottom: 10px;
}

.section-heading {
  text-align: center;
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  color: #fff;
}

.section-desc {
  text-align: center;
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 48px;
  line-height: 1.6;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
  margin-bottom: 64px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 0, 51, 0.35);
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
}

.icon-red { background: rgba(255, 0, 51, 0.12); color: var(--accent-red-bright); }
.icon-cyan { background: rgba(0, 242, 254, 0.12); color: var(--accent-cyan); }
.icon-amber { background: rgba(255, 170, 0, 0.12); color: var(--accent-amber); }
.icon-green { background: rgba(0, 230, 118, 0.12); color: var(--accent-emerald); }
.icon-purple { background: rgba(121, 40, 202, 0.12); color: var(--accent-purple); }

.feature-title {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: #fff;
}

.feature-text {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* Steps Grid */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-bottom: 64px;
}

.step-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
}

.step-number {
  font-size: 2.5rem;
  font-weight: 900;
  font-family: var(--font-mono);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.3) 0%, rgba(255, 255, 255, 0.05) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 14px;
}

.step-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
}

.step-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* FAQ Accordion */
.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition-fast);
}

.faq-item:hover {
  border-color: rgba(255, 255, 255, 0.18);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  text-align: left;
}

.faq-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-normal);
  color: var(--text-muted);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--accent-red-bright);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-smooth);
}

.faq-item.active .faq-answer {
  max-height: 800px;
}

.faq-answer-inner {
  padding: 0 24px 24px;
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Toast Notification System
   -------------------------------------------------------------------------- */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
  max-width: calc(100vw - 32px);
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 22px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: #fff;
  box-shadow: var(--shadow-lg);
  font-size: 0.92rem;
  font-weight: 600;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.toast.hide {
  opacity: 0;
  transform: translateY(20px);
}

.toast.toast-success {
  border-left: 4px solid var(--accent-emerald);
}

.toast.toast-error {
  border-left: 4px solid var(--accent-red-bright);
}

.toast.toast-info {
  border-left: 4px solid var(--accent-cyan);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  margin-top: auto;
  background: #05070d;
  border-top: 1px solid var(--border-subtle);
  padding: 48px 0 28px;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 32px;
}

.footer-nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-nav a:hover {
  color: #fff;
}

.footer-disclaimer {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 900px;
  margin-bottom: 24px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.84rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   Responsive Media Queries & Mobile Polish
   -------------------------------------------------------------------------- */

/* Tablet (iPad / Landscape / 1024px) */
@media (max-width: 1024px) {
  .container {
    padding: 0 20px;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }

  .media-header {
    grid-template-columns: 280px 1fr;
    gap: 22px;
  }
}

/* Small Tablet & Phablet (768px) */
@media (max-width: 768px) {
  .hero-title {
    font-size: clamp(2rem, 5.5vw, 2.8rem);
  }

  .hero-subtitle {
    font-size: 0.98rem;
    margin-bottom: 28px;
  }

  .media-header {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .thumbnail-wrap {
    max-width: 420px;
    margin: 0 auto;
  }

  .shorts-container {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .shorts-preview-card {
    max-width: 260px;
    margin: 0 auto;
  }

  .steps-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .tabs-wrapper {
    justify-content: flex-start;
    padding: 4px 0 10px;
  }

  .tabs-nav {
    display: inline-flex;
    flex-wrap: nowrap;
    gap: 6px;
  }
}

/* Standard Mobile (640px) */
@media (max-width: 640px) {
  .navbar {
    height: 60px;
  }

  .network-pill {
    display: none;
  }

  .hero {
    padding: 30px 0 16px;
  }

  .hero-badge {
    font-size: 0.78rem;
    padding: 5px 12px;
  }

  .search-container {
    margin-bottom: 36px;
  }

  /* Two-row mobile search form */
  .search-box-wrap {
    flex-direction: column;
    align-items: stretch;
    padding: 14px;
    border-radius: var(--radius-lg);
    gap: 10px;
  }

  .search-input-group {
    width: 100%;
    display: flex;
    align-items: center;
  }

  .search-icon {
    width: 20px;
    height: 20px;
    margin-right: 10px;
  }

  .search-input {
    font-size: 0.96rem;
    padding: 4px 0;
  }

  .input-actions {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 8px;
    padding-top: 10px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }

  .btn-paste, .btn-clear {
    padding: 10px 14px;
    min-height: 44px;
    font-size: 0.84rem;
    flex: 0 0 auto;
  }

  .btn-submit {
    flex: 1;
    min-height: 46px;
    justify-content: center;
    font-size: 0.95rem;
    padding: 10px 18px;
  }

  .search-hints {
    font-size: 0.78rem;
    gap: 8px 14px;
  }

  .media-card {
    padding: 18px 16px;
    border-radius: var(--radius-md);
  }

  .media-title {
    font-size: 1.18rem;
    line-height: 1.4;
    word-break: break-word;
  }

  /* Mobile Streams Card Transform */
  .streams-table,
  .streams-table tbody,
  .stream-row {
    display: block;
    width: 100%;
  }

  .streams-table thead {
    display: none;
  }

  .stream-row {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 14px;
    margin-bottom: 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .stream-row:hover {
    transform: none;
    background: var(--bg-card-hover);
  }

  .stream-row td {
    padding: 0;
    text-align: left !important;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: none;
  }

  .stream-row td:first-child {
    border-radius: 0;
  }

  .stream-row td:last-child {
    border-radius: 0;
    width: 100%;
    margin-top: 4px;
  }

  .stream-row .btn-dl {
    width: 100%;
    min-height: 44px;
    justify-content: center;
  }

  /* Shorts Module Mobile */
  .shorts-preview-card {
    max-width: 220px;
    margin: 0 auto 16px;
  }

  .shorts-download-banner {
    padding: 16px;
  }

  .shorts-btn-row {
    flex-direction: column;
    gap: 10px;
  }

  .shorts-btn-row .btn-dl,
  .shorts-btn-row .btn-secondary {
    width: 100%;
    min-height: 46px;
    justify-content: center;
    font-size: 0.92rem;
  }

  /* Audio Module Mobile */
  .audio-customizer {
    padding: 16px;
  }

  .format-selector {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    width: 100%;
  }

  .format-btn {
    padding: 10px 6px;
    font-size: 0.8rem;
    text-align: center;
    justify-content: center;
    min-height: 44px;
  }

  #btn-trigger-audio-dl {
    width: 100%;
    min-height: 46px;
    justify-content: center;
  }

  /* Thumbnail Module Mobile */
  .thumbnail-gallery-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .thumb-actions {
    grid-template-columns: 1fr 48px;
    gap: 8px;
  }

  .btn-thumb-dl {
    min-height: 44px;
    font-size: 0.85rem;
  }

  .btn-copy-thumb {
    min-height: 44px;
    min-width: 48px;
    justify-content: center;
  }

  /* Channel Module Mobile */
  .channel-hero-banner {
    height: 130px;
  }

  .channel-profile-body {
    padding: 0 14px 16px;
    margin-top: -40px;
  }

  .channel-avatar-img {
    width: 76px;
    height: 76px;
    border-width: 3px;
  }

  .channel-name {
    font-size: 1.25rem;
  }

  .channel-assets-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .asset-card .btn-thumb-dl {
    width: 100%;
    min-height: 44px;
  }

  /* FAQ Mobile */
  .faq-question {
    padding: 16px 18px;
    font-size: 0.95rem;
  }

  .faq-answer-inner {
    padding: 0 18px 18px;
    font-size: 0.88rem;
  }

  /* Toast Notification Mobile */
  .toast-container {
    left: 14px;
    right: 14px;
    bottom: 16px;
  }

  .toast {
    width: 100%;
    padding: 12px 16px;
    font-size: 0.88rem;
  }

  /* Footer Mobile */
  .footer-top {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 20px;
  }

  .footer-nav {
    justify-content: center;
    gap: 14px 18px;
    font-size: 0.85rem;
  }

  .footer-disclaimer {
    text-align: center;
    font-size: 0.76rem;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 10px;
  }
}

/* Compact Mobile (<= 420px & 360px) */
@media (max-width: 420px) {
  .container {
    padding: 0 14px;
  }

  .hero-title {
    font-size: 1.85rem;
  }

  .hero-badge {
    font-size: 0.72rem;
  }

  .tab-btn {
    padding: 8px 14px;
    font-size: 0.84rem;
    min-height: 42px;
  }

  .tab-btn svg {
    width: 16px;
    height: 16px;
  }

  .input-actions {
    flex-wrap: wrap;
  }

  .btn-paste, .btn-clear {
    flex: 1 1 auto;
    justify-content: center;
  }

  .btn-submit {
    flex: 1 1 100%;
  }

  .media-card {
    padding: 14px 12px;
  }

  .quality-badge {
    font-size: 0.8rem;
  }

  .format-tag, .filesize-tag {
    font-size: 0.78rem;
  }

  .feature-card, .step-card {
    padding: 20px 14px;
  }
}