:root {
  color-scheme: dark;
  --bg-primary: #0a0d14;
  --bg-surface: rgba(18, 24, 38, 0.85);
  --bg-surface-raised: rgba(26, 35, 54, 0.95);
  --bg-input: #0f1422;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: #00e5ff;
  --text-primary: #f0f4fc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-cyan: #00e5ff;
  --accent-green: #10b981;
  --accent-red: #ef4444;
  --accent-purple: #8b5cf6;
  --accent-orange: #f59e0b;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-panel: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

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

body {
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(at 0% 0%, rgba(0, 229, 255, 0.07) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(139, 92, 246, 0.06) 0px, transparent 50%);
  color: var(--text-primary);
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Header */
.app-header {
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(10, 13, 20, 0.8);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
}

.brand-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(0, 229, 255, 0.35);
}

.brand-icon svg {
  width: 18px;
  height: 18px;
  fill: #0a0d14;
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.badge-ng {
  background: rgba(0, 229, 255, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 229, 255, 0.3);
  font-size: 0.7rem;
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.825rem;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  padding: 0.35rem 0.75rem;
  border-radius: 20px;
  border: 1px solid var(--border-subtle);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: all 0.3s ease;
}

.status-dot.connected {
  background: var(--accent-green);
  box-shadow: 0 0 10px var(--accent-green);
}

.status-dot.connecting {
  background: var(--accent-orange);
  box-shadow: 0 0 10px var(--accent-orange);
  animation: pulse 1.5s infinite;
}

.status-dot.error {
  background: var(--accent-red);
  box-shadow: 0 0 10px var(--accent-red);
}

@keyframes pulse {
  0% { opacity: 0.4; }
  50% { opacity: 1; }
  100% { opacity: 0.4; }
}

/* Main Layout */
.main-content {
  flex: 1;
  max-width: 1300px;
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Stream Control Card */
.control-card {
  background: var(--bg-surface);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-panel);
}

.tab-nav {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.75rem;
  margin-bottom: 1.25rem;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}

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

.tab-btn.active {
  color: var(--accent-cyan);
  background: rgba(0, 229, 255, 0.1);
  font-weight: 600;
}

.input-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 768px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.field-group label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.field-hint {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.input-text {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.65rem 0.85rem;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.input-text:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px rgba(0, 229, 255, 0.2);
}

.form-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 0.5rem;
}

.btn-group {
  display: flex;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #00c6ff, #0072ff);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(0, 114, 255, 0.35);
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 6px 20px rgba(0, 114, 255, 0.5);
}

.btn-primary.connected {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.35);
}

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

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-share {
  background: rgba(0, 229, 255, 0.08);
  border-color: rgba(0, 229, 255, 0.25);
  color: var(--accent-cyan);
}

.btn-share:hover {
  background: rgba(0, 229, 255, 0.16);
}

/* Player Grid Layout */
.stream-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

@media (max-width: 980px) {
  .stream-grid {
    grid-template-columns: 1fr;
  }
}

/* Video Frame Container */
.player-container {
  background: #000;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-panel);
  position: relative;
}

.plyr {
  border-radius: var(--radius-lg);
  --plyr-color-main: var(--accent-cyan);
}

.video-overlay-msg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  background: rgba(10, 13, 20, 0.85);
  backdrop-filter: blur(8px);
  z-index: 10;
  padding: 2rem;
  text-align: center;
}

.video-overlay-msg.hidden {
  display: none;
}

.spinner {
  width: 42px;
  height: 42px;
  border: 3px solid rgba(0, 229, 255, 0.15);
  border-top-color: var(--accent-cyan);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Telemetry Drawer / Sidebar */
.telemetry-card {
  background: var(--bg-surface);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-panel);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.card-heading {
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.stat-box {
  background: var(--bg-surface-raised);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat-value {
  font-size: 1.15rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text-primary);
}

.stat-value.highlight-green {
  color: var(--accent-green);
}

.stat-value.highlight-cyan {
  color: var(--accent-cyan);
}

.stat-value.highlight-red {
  color: var(--accent-red);
}

/* Peer List Table */
.peer-list-container {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.peer-table-wrapper {
  max-height: 220px;
  overflow-y: auto;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
}

.peer-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.75rem;
  font-family: var(--font-mono);
}

.peer-table th {
  text-align: left;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  padding: 0.4rem 0.6rem;
  font-weight: 600;
  position: sticky;
  top: 0;
  border-bottom: 1px solid var(--border-subtle);
}

.peer-table td {
  padding: 0.45rem 0.6rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
}

.peer-table tr:hover td {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-primary);
}

.peer-tag {
  display: inline-block;
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  font-size: 0.68rem;
}

.peer-tag.state-connected {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
}

.peer-tag.state-connecting {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-orange);
}

.empty-peers {
  padding: 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  background: var(--bg-surface-raised);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: slideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast.toast-success {
  border-color: rgba(16, 185, 129, 0.4);
}

.toast.toast-error {
  border-color: rgba(239, 68, 68, 0.4);
}

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

/* Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}