:root {
  --bg-main: #090d16;
  --bg-card: rgba(18, 24, 38, 0.7);
  --bg-card-hover: rgba(26, 34, 52, 0.85);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(99, 102, 241, 0.3);
  
  --primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
  --secondary-gradient: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --tiktok-gradient: linear-gradient(135deg, #00f2fe 0%, #4facfe 50%, #fe0979 100%);
  --instagram-gradient: linear-gradient(135deg, #833ab4 0%, #fd1d1d 50%, #fcb045 100%);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-sub: #64748b;
  
  --color-success: #10b981;
  --color-error: #f43f5e;
  --color-warning: #f59e0b;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-glow: 0 10px 30px -10px rgba(99, 102, 241, 0.3);
  --shadow-card: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  line-height: 1.5;
}

/* Background luminous orbs */
.glow-bg {
  position: fixed;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.25;
  transition: transform 10s ease-in-out;
}
.glow-bg.top-left {
  top: -150px;
  left: -150px;
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, #6366f1 0%, rgba(99, 102, 241, 0) 70%);
}
.glow-bg.bottom-right {
  bottom: -150px;
  right: -150px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #ec4899 0%, rgba(236, 72, 153, 0) 70%);
}
.glow-bg.center {
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, #06b6d4 0%, rgba(6, 182, 212, 0) 70%);
  opacity: 0.12;
}

.app-layout {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px 60px 20px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  margin-bottom: 36px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.brand-text h1 {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(120deg, #ffffff 40%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.badge-desktop {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #a5b4fc;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid rgba(99, 102, 241, 0.3);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

/* Buttons */
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-fast);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  color: var(--text-main);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 700;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -5px rgba(139, 92, 246, 0.5);
}
.btn-primary:active {
  transform: translateY(0);
}

.btn-icon {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  color: var(--text-muted);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
}
.btn-icon:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-main);
}

.btn-ghost {
  background: transparent;
  color: var(--text-sub);
  padding: 8px;
  border-radius: var(--radius-sm);
}
.btn-ghost:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.06);
}

/* Main Container */
.main-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

/* Hero Section */
.hero-section {
  text-align: center;
  padding: 20px 0 10px 0;
}

.platform-chips {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  color: var(--text-muted);
  backdrop-filter: blur(10px);
}
.chip .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}
.chip-tiktok .dot { background: #00f2fe; box-shadow: 0 0 8px #00f2fe; }
.chip-instagram .dot { background: #fd1d1d; box-shadow: 0 0 8px #fd1d1d; }
.chip-universal .dot { background: #a855f7; box-shadow: 0 0 8px #a855f7; }

.hero-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #ffffff 30%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 580px;
  margin: 0 auto 30px auto;
}

/* Search Box Card */
.search-box-card {
  max-width: 780px;
  margin: 0 auto;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 12px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.05);
  transition: border-color var(--transition-smooth);
}
.search-box-card:focus-within {
  border-color: rgba(139, 92, 246, 0.6);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6), 0 0 25px rgba(99, 102, 241, 0.25);
}

.search-input-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
}

.input-icon {
  color: var(--text-sub);
  display: flex;
  align-items: center;
  padding-left: 10px;
}

#video-url-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text-main);
  padding: 12px 4px;
}
#video-url-input::placeholder {
  color: var(--text-sub);
}

.search-hint {
  font-size: 0.75rem;
  color: var(--text-sub);
  margin-top: 10px;
  text-align: left;
  padding: 0 10px;
}

/* Error Banner */
.error-banner {
  max-width: 780px;
  margin: 0 auto;
  background: rgba(244, 63, 94, 0.1);
  border: 1px solid rgba(244, 63, 94, 0.3);
  color: #fda4af;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  animation: fadeIn 0.3s ease;
}

/* Preview Card */
.preview-section {
  max-width: 780px;
  margin: 0 auto;
  width: 100%;
  animation: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.preview-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  gap: 24px;
  box-shadow: var(--shadow-card);
}

.preview-media-container {
  position: relative;
  width: 220px;
  height: 280px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #000;
  border: 1px solid var(--border-glass);
}

.preview-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.preview-card:hover .preview-thumb {
  transform: scale(1.03);
}

.preview-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
}

.preview-platform-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  color: #fff;
  letter-spacing: 0.05em;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
}
.preview-platform-badge.tiktok {
  background: var(--tiktok-gradient);
}
.preview-platform-badge.instagram {
  background: var(--instagram-gradient);
}

.preview-details {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.preview-author-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.author-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

.author-meta {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
}

.platform-name {
  font-size: 0.75rem;
  color: var(--text-sub);
}

.preview-title {
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 20px;
  color: #e2e8f0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.download-actions-card {
  margin-top: auto;
  background: rgba(0, 0, 0, 0.25);
  border-radius: var(--radius-md);
  padding: 16px;
  border: 1px solid var(--border-glass);
}

.actions-header {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-sub);
  margin-bottom: 12px;
}

.formats-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.format-btn {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-fast);
}

.format-btn-primary {
  background: var(--primary-gradient);
  color: #fff;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}
.format-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.5);
}

.format-btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-glass);
  color: var(--text-main);
}
.format-btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.format-badge {
  font-size: 0.75rem;
  background: rgba(0, 0, 0, 0.3);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: 500;
}

/* Active Downloads Queue */
.queue-section {
  max-width: 780px;
  margin: 0 auto;
  width: 100%;
}

.tasks-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.task-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  box-shadow: var(--shadow-card);
  animation: fadeIn 0.3s ease;
}

.task-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.task-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 450px;
}

.task-meta {
  font-size: 0.8rem;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-sub);
}

.progress-bar-bg {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.progress-bar-fill {
  height: 100%;
  background: var(--primary-gradient);
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
  position: relative;
}
.progress-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.3) 50%,
    rgba(255, 255, 255, 0) 100%
  );
  animation: shimmer 1.5s infinite;
}

.task-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.btn-open-finished {
  background: rgba(16, 185, 129, 0.2);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: #34d399;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 700;
}
.btn-open-finished:hover {
  background: rgba(16, 185, 129, 0.3);
  transform: translateY(-1px);
}

/* History Section */
.history-section {
  max-width: 780px;
  margin: 0 auto;
  width: 100%;
}

.section-title-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.title-with-count {
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-main);
}

.count-badge {
  background: rgba(255, 255, 255, 0.08);
  font-size: 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  color: var(--text-muted);
}

.history-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.history-item {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: all var(--transition-fast);
}
.history-item:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateX(3px);
}

.history-thumb {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  background: #000;
  flex-shrink: 0;
}

.history-info {
  flex: 1;
  min-width: 0;
}

.history-filename {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 4px;
}

.history-meta {
  font-size: 0.75rem;
  color: var(--text-sub);
  display: flex;
  gap: 12px;
}

.empty-state {
  text-align: center;
  padding: 40px 20px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px dashed rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  color: var(--text-sub);
}
.empty-icon {
  font-size: 2.2rem;
  margin-bottom: 10px;
  opacity: 0.7;
}
.empty-state p {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.empty-state span {
  font-size: 0.8rem;
}

/* Footer */
.footer {
  margin-top: auto;
  padding-top: 30px;
  text-align: center;
  border-top: 1px solid var(--border-glass);
}
.footer-content {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-sub);
}
.footer-dir {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  color: #818cf8;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: rgba(18, 24, 38, 0.95);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-glass);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  color: var(--text-main);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideInRight 0.3s ease;
}
.toast.success { border-color: rgba(16, 185, 129, 0.4); color: #34d399; }
.toast.error { border-color: rgba(244, 63, 94, 0.4); color: #fda4af; }

/* Utilities */
.hidden { display: none !important; }

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(15px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideInRight { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: translateX(0); } }
@keyframes shimmer { 0% { transform: translateX(-100%); } 100% { transform: translateX(100%); } }

/* Responsive */
@media (max-width: 640px) {
  .preview-card {
    flex-direction: column;
  }
  .preview-media-container {
    width: 100%;
    height: 220px;
  }
  .hero-title {
    font-size: 1.6rem;
  }
  .search-input-wrapper {
    flex-wrap: wrap;
  }
  #video-url-input {
    min-width: 100%;
  }
}