:root {
  --bg-primary: #090a0f;
  --bg-surface: #12151f;
  --bg-surface-glass: rgba(18, 21, 31, 0.75);
  --bg-card: #171b29;
  --bg-card-hover: #1f2538;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: #6366f1;
  --accent: #6366f1;
  --accent-glow: rgba(99, 102, 241, 0.35);
  --accent-secondary: #06b6d4;
  --accent-green: #10b981;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 26px;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  min-height: 100vh;
  line-height: 1.5;
  overflow-x: hidden;
  position: relative;
}

/* Atmospheric ambient background */
.background-glow {
  position: fixed;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(6, 182, 212, 0.08) 40%, rgba(9, 10, 15, 0) 70%);
  filter: blur(80px);
  z-index: -1;
  pointer-events: none;
}

/* Header */
.app-header {
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(16px);
  background: var(--bg-surface-glass);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.brand-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 18px var(--accent-glow);
}

.brand-text h1 {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-text h1 span {
  background: linear-gradient(135deg, #a5b4fc, #38bdf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.badge-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: 9999px;
  transition: var(--transition);
}

.badge-link:hover {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--accent);
  color: #fff;
}

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

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

/* Layout */
.main-container {
  max-width: 1100px;
  margin: 32px auto 80px;
  padding: 0 20px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* Cards */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(10px);
}

/* Worker Config Bar */
.worker-config-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.worker-config-info {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
}

.worker-input-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  max-width: 480px;
}

.worker-input-group input {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--text-primary);
  outline: none;
  transition: var(--transition);
}

.worker-input-group input:focus {
  border-color: var(--accent);
}

/* Form */
.url-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.input-wrapper {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 6px 8px 6px 16px;
  transition: var(--transition);
}

.input-wrapper:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.input-icon {
  color: var(--text-muted);
  display: flex;
  align-items: center;
  margin-right: 12px;
}

.input-wrapper input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--text-primary);
}

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

.action-mini-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

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

.form-buttons {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-family: var(--font-sans);
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  color: #ffffff;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #4f46e5, #4338ca);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-success {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
  background: linear-gradient(135deg, #059669, #047857);
  transform: translateY(-1px);
}

.btn-large {
  padding: 14px 24px;
  font-size: 0.95rem;
}

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: #fff;
  animation: spin 0.8s linear infinite;
}

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

/* Error Banner */
.error-banner {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
}

/* Media Section & Player */
.media-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.player-wrapper {
  background: #000;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7);
  position: relative;
}

.player-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #050608;
  display: flex;
  align-items: center;
  justify-content: center;
}

#videoPlayer {
  width: 100%;
  height: 100%;
  object-fit: contain;
  outline: none;
  background: #000;
}

.player-shortcut-hints {
  background: rgba(10, 12, 18, 0.95);
  border-top: 1px solid var(--border-subtle);
  padding: 10px 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.player-shortcut-hints kbd {
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
}

/* Media Info Card */
.media-info-card {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

.file-meta {
  display: flex;
  align-items: center;
  gap: 16px;
}

.file-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.25);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.file-title {
  font-size: 1.18rem;
  font-weight: 700;
  word-break: break-all;
  margin-bottom: 6px;
}

.file-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.badge {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 9999px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.badge-accent {
  background: rgba(99, 102, 241, 0.18);
  color: #a5b4fc;
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.badge-neutral {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.badge-success {
  background: rgba(16, 185, 129, 0.15);
  color: #6ee7b7;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.action-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--border-subtle);
}

/* Developer Card & Code Snippets */
.dev-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.dev-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.dev-title {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  font-weight: 700;
}

.dev-tabs {
  display: flex;
  background: var(--bg-card);
  padding: 4px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn.active {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
}

.code-wrapper {
  position: relative;
  background: #0b0d14;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.code-wrapper pre {
  padding: 16px 20px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  color: #cbd5e1;
}

.code-copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
}

.code-copy-btn:hover {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
}

/* History */
.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.history-header h3 {
  font-size: 1rem;
  font-weight: 700;
}

.clear-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.8rem;
  cursor: pointer;
}

.clear-btn:hover {
  color: #f87171;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: var(--transition);
}

.history-item:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
}

.history-item-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
}

.history-item-sub {
  font-size: 0.76rem;
  color: var(--text-muted);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: #1e293b;
  border: 1px solid var(--accent);
  color: #fff;
  padding: 10px 20px;
  border-radius: 9999px;
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  opacity: 0;
  transition: var(--transition);
  z-index: 9999;
  pointer-events: none;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Footer */
.app-footer {
  text-align: center;
  padding: 24px 20px 40px;
  color: var(--text-muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border-subtle);
  margin-top: 40px;
}

/* Responsive */
@media (max-width: 640px) {
  .header-container {
    padding: 12px 16px;
  }
  .form-buttons {
    flex-direction: column;
    align-items: stretch;
  }
  .action-grid {
    grid-template-columns: 1fr;
  }
  .player-shortcut-hints {
    display: none;
  }
}