/* App Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.logo-icon {
  font-size: 1.75rem;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.version-badge {
  font-size: 0.625rem;
  font-weight: 600;
  padding: 2px 6px;
  background: var(--accent-purple);
  color: white;
  border-radius: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  font-size: 1.25rem;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--bg-hover);
  transform: scale(1.05);
}

/* Stream Selector */
.stream-selector {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  max-height: 120px;
  flex-wrap: nowrap;
}

.stream-btn {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  min-width: 100px;
  max-width: 160px;
}

.stream-btn:hover {
  background: var(--bg-hover);
  border-color: var(--accent-purple);
}

.stream-btn.active {
  background: var(--accent-gradient);
  border-color: transparent;
  color: white;
  box-shadow: var(--shadow-glow);
}

.stream-icon {
  font-size: 1rem;
}

.stream-badge {
  font-size: 0.625rem;
  padding: 2px 6px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  margin-left: auto;
}

.stream-loading,
.stream-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: var(--spacing-lg);
  color: var(--text-muted);
  font-size: 0.875rem;
}

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

/* Scroll indicators for mobile */
.stream-selector::after,
.stream-selector::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 40px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s;
}

.stream-selector {
  position: relative;
}

/* Show scroll hint on mobile when overflow */
@media (max-width: 639px) {
  .stream-selector {
    scrollbar-width: thin;
    scrollbar-color: var(--accent-purple) var(--bg-secondary);
  }
  
  .stream-selector::-webkit-scrollbar {
    height: 6px;
  }
  
  .stream-selector::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 3px;
  }
  
  .stream-selector::-webkit-scrollbar-thumb {
    background: var(--accent-purple);
    border-radius: 3px;
  }
}

/* Tab Navigation */
.tab-nav {
  display: flex;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 57px;
  z-index: 90;
}

.tab-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: var(--spacing-sm) var(--spacing-xs);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.tab-btn.active {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
}

.tab-icon {
  font-size: 1.25rem;
}

/* Content Area */
.content-area {
  padding: var(--spacing-md);
  min-height: calc(100vh - 200px);
}

.tab-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

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

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Glass Card */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

/* Responsive */
@media (min-width: 640px) {
  .app-header {
    padding: var(--spacing-md) var(--spacing-lg);
  }
  
  .logo-text {
    font-size: 1.5rem;
  }
  
  .stream-selector {
    padding: var(--spacing-md) var(--spacing-lg);
    justify-content: flex-start;
    flex-wrap: wrap;
    max-height: none;
    overflow-x: visible;
    overflow-y: visible;
  }
  
  .stream-btn {
    flex: 0 0 auto;
    min-width: 120px;
    max-width: 180px;
    font-size: 0.9rem;
  }
  
  .tab-btn {
    flex-direction: row;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    padding: var(--spacing-md);
  }
  
  .content-area {
    padding: var(--spacing-lg);
    max-width: 800px;
    margin: 0 auto;
  }
}

@media (min-width: 1024px) {
  #app {
    display: grid;
    grid-template-columns: 280px 1fr;
    grid-template-rows: auto auto 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    max-width: 1400px;
    margin: 0 auto;
  }
  
  .app-header {
    grid-column: 1 / -1;
    position: static;
    border-radius: var(--radius-lg);
  }
  
  .stream-selector {
    grid-column: 1 / -1;
    border-radius: var(--radius-lg);
  }
  
  .tab-nav {
    grid-column: 1;
    grid-row: 3;
    flex-direction: column;
    position: static;
    border-radius: var(--radius-lg);
    height: fit-content;
  }
  
  .tab-btn {
    flex-direction: row;
    justify-content: flex-start;
    border-bottom: none;
    border-left: 2px solid transparent;
  }
  
  .tab-btn.active {
    border-bottom-color: transparent;
    border-left-color: var(--accent-cyan);
  }
  
  .content-area {
    grid-column: 2;
    grid-row: 3;
    max-width: none;
  }
}