/* ==========================================================================
   Billboard-lite Modern Administrator Dashboard Design System
   ========================================================================== */

:root {
  --bg-primary: #080c14;
  --bg-surface: rgba(15, 22, 36, 0.75);
  --bg-surface-elevated: rgba(22, 32, 54, 0.85);
  --bg-surface-hover: rgba(30, 44, 72, 0.6);
  --bg-input: rgba(10, 15, 26, 0.8);

  --border-subtle: rgba(255, 255, 255, 0.07);
  --border-light: rgba(255, 255, 255, 0.12);
  --border-accent: rgba(6, 182, 212, 0.4);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-on-accent: #041018;

  --accent-cyan: #06b6d4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.25);
  --accent-blue: #3b82f6;
  --accent-emerald: #10b981;
  --accent-emerald-glow: rgba(16, 185, 129, 0.25);
  --accent-amber: #f59e0b;
  --accent-amber-glow: rgba(245, 158, 11, 0.25);
  --accent-rose: #f43f5e;
  --accent-rose-glow: rgba(244, 63, 94, 0.25);
  --accent-purple: #8b5cf6;
  --accent-purple-glow: rgba(139, 92, 246, 0.25);

  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Menlo, monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 9999px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px 0 rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 32px 0 rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 24px -4px var(--accent-cyan-glow);

  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  background-image: 
    radial-gradient(ellipse at 15% 10%, rgba(6, 182, 212, 0.1) 0%, transparent 40%),
    radial-gradient(ellipse at 85% 85%, rgba(139, 92, 246, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, rgba(15, 23, 42, 0.5) 0%, transparent 100%);
  background-attachment: fixed;
}

/* Scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: rgba(10, 15, 26, 0.5);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-pill);
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 2rem;
  background: rgba(8, 12, 20, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px var(--accent-cyan-glow);
  color: #fff;
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(to right, #fff, #cbd5e1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-tag {
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-pill);
  background: rgba(6, 182, 212, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.status-pill {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-pill);
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-subtle);
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

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

@keyframes pulse-glow {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.region-pill {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  background: rgba(59, 130, 246, 0.1);
  color: #93c5fd;
  border: 1px solid rgba(59, 130, 246, 0.25);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.user-info {
  text-align: right;
  line-height: 1.2;
}

.user-email {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-primary);
}

.user-badge {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: #f59e0b;
}

/* ==========================================================================
   Navigation Tabs
   ========================================================================== */

.nav-tabs-container {
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem 2rem 0;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(10, 15, 26, 0.4);
  overflow-x: auto;
}

.nav-tab-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-tab-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.02);
}

.nav-tab-btn.active {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
  font-weight: 600;
}

.tab-badge {
  font-size: 0.75rem;
  padding: 0.1rem 0.45rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
}

.nav-tab-btn.active .tab-badge {
  background: rgba(6, 182, 212, 0.2);
  color: var(--accent-cyan);
}

.tab-badge.badge-alert {
  background: rgba(245, 158, 11, 0.2);
  color: var(--accent-amber);
}

/* ==========================================================================
   Main Content Layout
   ========================================================================== */

.app-main {
  padding: 2rem;
  max-width: 1440px;
  margin: 0 auto;
}

.tab-content {
  display: none;
  animation: fadeIn 0.2s ease-out;
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Card System & Glassmorphism
   ========================================================================== */

.glass-card {
  background: var(--bg-surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.glass-card:hover {
  border-color: var(--border-light);
}

.glass-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.glass-card-title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-primary);
}

/* Metric Cards Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.metric-card {
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
}

.metric-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.metric-value {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.1;
  margin-bottom: 0.5rem;
}

.metric-meta {
  font-size: 0.8125rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.metric-icon-bubble {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   Precedence Matrix Visualizer
   ========================================================================== */

.precedence-flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 1rem;
}

.precedence-card {
  padding: 1.25rem;
  border-radius: var(--radius-md);
  background: rgba(12, 18, 30, 0.7);
  border: 1px solid var(--border-subtle);
  position: relative;
}

.precedence-card.tier-1 {
  border-color: rgba(6, 182, 212, 0.4);
  box-shadow: 0 0 16px -4px var(--accent-cyan-glow);
}
.precedence-card.tier-2 {
  border-color: rgba(139, 92, 246, 0.4);
  box-shadow: 0 0 16px -4px var(--accent-purple-glow);
}
.precedence-card.tier-3 {
  border-color: rgba(59, 130, 246, 0.4);
}

.tier-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.75rem;
}

.tier-badge.tier-1-badge { background: rgba(6, 182, 212, 0.15); color: var(--accent-cyan); }
.tier-badge.tier-2-badge { background: rgba(139, 92, 246, 0.15); color: #c084fc; }
.tier-badge.tier-3-badge { background: rgba(59, 130, 246, 0.15); color: #93c5fd; }

.tier-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.tier-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* ==========================================================================
   Tables
   ========================================================================== */

.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.custom-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
}

.custom-table th {
  background: rgba(12, 17, 28, 0.9);
  padding: 0.875rem 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
}

.custom-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
  vertical-align: middle;
}

.custom-table tbody tr {
  transition: background-color var(--transition-fast);
}

.custom-table tbody tr:hover {
  background-color: var(--bg-surface-hover);
}

/* Status Badges */
.status-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-pill);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.status-tag.approved {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-tag.pending {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-amber);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.status-tag.rejected {
  background: rgba(244, 63, 94, 0.15);
  color: var(--accent-rose);
  border: 1px solid rgba(244, 63, 94, 0.3);
}

.status-tag.revoked {
  background: rgba(100, 116, 139, 0.15);
  color: #94a3b8;
  border: 1px solid rgba(100, 116, 139, 0.3);
}

.online-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
}

.online-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: #64748b;
}

.online-dot.is-online {
  background-color: var(--accent-emerald);
  box-shadow: 0 0 6px var(--accent-emerald);
}

/* ==========================================================================
   Buttons & Interactive Elements
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.55rem 1.15rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), #0284c7);
  color: #fff;
  box-shadow: 0 2px 10px var(--accent-cyan-glow);
}
.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--accent-cyan-glow);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-light);
  color: var(--text-primary);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
}

.btn-danger {
  background: rgba(244, 63, 94, 0.15);
  border-color: rgba(244, 63, 94, 0.3);
  color: var(--accent-rose);
}
.btn-danger:hover {
  background: rgba(244, 63, 94, 0.25);
  border-color: rgba(244, 63, 94, 0.5);
}

.btn-success {
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.3);
  color: var(--accent-emerald);
}
.btn-success:hover {
  background: rgba(16, 185, 129, 0.25);
  border-color: rgba(16, 185, 129, 0.5);
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8125rem;
  border-radius: var(--radius-sm);
}

.btn-icon {
  padding: 0.45rem;
  border-radius: var(--radius-sm);
}

/* Form Inputs */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.form-control {
  width: 100%;
  padding: 0.65rem 0.875rem;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.875rem;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px var(--accent-cyan-glow);
}

.filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.filter-pills {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.filter-pill {
  padding: 0.35rem 0.85rem;
  font-size: 0.8125rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-pill:hover, .filter-pill.active {
  background: rgba(6, 182, 212, 0.15);
  border-color: rgba(6, 182, 212, 0.4);
  color: var(--accent-cyan);
}

/* ==========================================================================
   Grid & Card Items for Channels & Groups
   ========================================================================== */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
}

.channel-card, .group-card {
  padding: 1.25rem;
  border-radius: var(--radius-md);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.channel-card:hover, .group-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-light);
}

.channel-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}

.channel-name {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.stream-type-tag {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.channel-url-preview {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.3);
  color: var(--text-secondary);
  word-break: break-all;
  max-height: 48px;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ==========================================================================
   Modals & Dialogs (<dialog>)
   ========================================================================== */

dialog.modal-dialog {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(24px);
  color: var(--text-primary);
  width: min(90vw, 560px);
  margin: auto;
  padding: 0;
  box-shadow: 0 24px 48px -12px rgba(0, 0, 0, 0.8), 0 0 32px var(--accent-cyan-glow);
  outline: none;
}

dialog.modal-dialog::backdrop {
  background: rgba(3, 7, 18, 0.8);
  backdrop-filter: blur(8px);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.modal-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.25rem;
  border-radius: var(--radius-sm);
}

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

.modal-body {
  padding: 1.5rem;
  max-height: 70vh;
  overflow-y: auto;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  padding: 1.25rem 1.5rem;
  border-top: 1px solid var(--border-subtle);
  background: rgba(10, 15, 26, 0.5);
}

/* ==========================================================================
   Auth / Login Overlay
   ========================================================================== */

.auth-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(8, 12, 20, 0.95);
  backdrop-filter: blur(24px);
}

.auth-overlay.hidden {
  display: none;
}

.auth-card {
  width: min(90vw, 420px);
  padding: 2.25rem;
  border-radius: var(--radius-xl);
  background: rgba(16, 24, 40, 0.85);
  border: 1px solid var(--border-light);
  box-shadow: 0 24px 64px -16px rgba(0, 0, 0, 0.8), 0 0 32px var(--accent-cyan-glow);
}

.auth-brand {
  text-align: center;
  margin-bottom: 1.75rem;
}

.auth-brand-logo {
  width: 48px;
  height: 48px;
  margin: 0 auto 1rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px var(--accent-cyan-glow);
}

.auth-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
}

.auth-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

/* ==========================================================================
   Toast Notifications
   ========================================================================== */

.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1100;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1.25rem;
  border-radius: var(--radius-md);
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-light);
  color: var(--text-primary);
  font-size: 0.875rem;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.25s ease-out;
  min-width: 280px;
}

.toast.toast-success { border-color: rgba(16, 185, 129, 0.4); }
.toast.toast-error { border-color: rgba(244, 63, 94, 0.4); }
.toast.toast-info { border-color: rgba(6, 182, 212, 0.4); }

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

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ==========================================================================
   Channel View Switcher & List View
   ========================================================================== */

.view-mode-toggle {
  display: inline-flex;
  align-items: center;
  background: rgba(10, 15, 26, 0.7);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 3px;
  gap: 3px;
}

.view-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.view-toggle-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.view-toggle-btn.active {
  background: var(--accent-cyan);
  color: var(--text-on-accent);
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.4);
}

.btn-play-channel {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.65rem;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-play-channel:hover {
  background: var(--accent-cyan);
  color: var(--text-on-accent);
  box-shadow: 0 0 12px var(--accent-cyan-glow);
  transform: translateY(-1px);
}

/* Player Modal Overlay Animations */
.player-modal {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8), 0 0 30px rgba(6, 182, 212, 0.2);
}

.player-overlay {
  transition: opacity 0.2s ease;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .app-header { padding: 0.75rem 1rem; }
  .app-main { padding: 1rem; }
  .precedence-flow { grid-template-columns: 1fr; }
  .nav-tabs-container { padding: 0.5rem 1rem 0; }
}