/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #4f46e5;
  --primary-hover: #4338ca;
  --danger-color: #dc2626;
  --danger-hover: #b91c1c;
  --bg-color: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-color: #f8fafc;
  --text-secondary: #94a3b8;
  --border-color: #475569;
  --success-color: #22c55e;
  --primary-glow: rgba(79, 70, 229, 0.3);
  --glass-bg: rgba(30, 41, 59, 0.8);
  --glass-border: rgba(255, 255, 255, 0.08);
}

/* Custom scrollbars */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  min-height: 100vh;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, #4f46e5, #6366f1);
  color: white;
  width: 100%;
  font-weight: 600;
  letter-spacing: 0.3px;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #4338ca, #4f46e5);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn-small {
  padding: 6px 12px;
  font-size: 14px;
}

/* Landing page */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.landing-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: radial-gradient(ellipse at 50% 40%, rgba(79, 70, 229, 0.12) 0%, transparent 60%), var(--bg-color);
}

.landing-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 40px;
  max-width: 450px;
  width: 100%;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  animation: fadeInUp 0.5s ease-out;
}

.landing-card h1 {
  text-align: center;
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 8px;
  background: linear-gradient(135deg, #818cf8, #4f46e5);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-size: 15px;
  letter-spacing: 0.3px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--bg-tertiary);
  color: var(--text-color);
  font-size: 16px;
  transition: border-color 0.2s ease;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2);
}

.form-group input::placeholder {
  color: var(--text-secondary);
}

/* Join error message */
.join-error {
  color: var(--danger-color);
  background-color: rgba(220, 38, 38, 0.1);
  border: 1px solid var(--danger-color);
  border-radius: 8px;
  padding: 10px 16px;
  margin-bottom: 16px;
  font-size: 14px;
}

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
}

.feature {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 14px;
}

.feature-icon {
  font-size: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(79, 70, 229, 0.1);
  color: #818cf8;
}

/* Room page */
.room-container {
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
}

.room-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 24px;
  background: linear-gradient(to right, var(--bg-secondary), rgba(30, 41, 59, 0.95));
  border-bottom: 1px solid var(--glass-border);
}

.room-info {
  display: flex;
  align-items: center;
  gap: 16px;
}

.room-info h1 {
  font-size: 20px;
}

.room-info-stack {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.room-brand {
  font-size: 10px;
  font-weight: 600;
  color: #818cf8;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.room-info-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.room-id {
  padding: 4px 12px;
  background-color: var(--bg-tertiary);
  border-radius: 4px;
  font-size: 14px;
  font-family: monospace;
}

.participant-count {
  color: var(--text-secondary);
}

/* Main content area */
.room-main {
  flex: 1;
  display: flex;
  overflow: hidden;
}

/* Video grid */
.video-grid {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
  padding: 16px;
  overflow-y: auto;
  align-content: start;
}

.video-container {
  position: relative;
  background-color: var(--bg-tertiary);
  border-radius: 12px;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.video-container:hover {
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.video-container.speaking {
  border-color: var(--success-color);
  box-shadow: 0 0 0 2px var(--success-color), 0 4px 16px rgba(34, 197, 94, 0.2);
}

.video-container video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-container.screen-share {
  grid-column: 1 / -1;
  max-height: 70vh;
  aspect-ratio: auto;
}

/* Expand / fullscreen tile */
.video-expand-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: none;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s ease, background 0.2s ease;
  z-index: 2;
}

.video-container:hover .video-expand-btn,
.video-expand-btn:focus-visible {
  opacity: 1;
}

.video-expand-btn:hover {
  background: rgba(0, 0, 0, 0.8);
}

.video-expand-btn .icon-collapse {
  display: none;
}

.video-container.expanded {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  max-height: none;
  aspect-ratio: auto;
  border-radius: 0;
  border: none;
  z-index: 9000;
  background: #000;
}

.video-container.expanded video {
  object-fit: contain;
}

.video-container.expanded .video-expand-btn {
  opacity: 1;
}

.video-container.expanded .icon-expand {
  display: none;
}

.video-container.expanded .icon-collapse {
  display: block;
}

body.tile-expanded .room-header,
body.tile-expanded .room-controls {
  display: none;
}

.video-label {
  position: absolute;
  bottom: 12px;
  left: 12px;
  padding: 4px 12px;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.2px;
}

.video-status {
  position: absolute;
  bottom: 12px;
  right: 12px;
  display: flex;
  gap: 8px;
}

.status-icon {
  font-size: 16px;
  opacity: 0.8;
  display: inline-flex;
  align-items: center;
}

.status-icon svg {
  display: block;
}

.status-icon.disabled {
  opacity: 0.3;
}

/* Sidebar */
.sidebar {
  width: 320px;
  background-color: var(--bg-secondary);
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease;
}

.sidebar.hidden {
  transform: translateX(100%);
  position: absolute;
  right: 0;
  height: calc(100vh - 140px);
}

.sidebar-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
}

.tab-btn {
  flex: 1;
  padding: 12px;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s ease;
}

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

.tab-btn.active {
  color: var(--text-color);
  border-bottom: 2px solid var(--primary-color);
}

.tab-content {
  display: none;
  flex: 1;
  flex-direction: column;
  overflow: hidden;
}

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

/* Chat */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
}

.chat-message {
  margin-bottom: 16px;
}

.chat-message-header {
  display: flex;
  gap: 8px;
  align-items: baseline;
  margin-bottom: 4px;
}

.chat-username {
  font-weight: 600;
  font-size: 14px;
}

.chat-time {
  font-size: 12px;
  color: var(--text-secondary);
}

.chat-text {
  font-size: 14px;
  line-height: 1.4;
  word-wrap: break-word;
}

.chat-system-message {
  text-align: center;
  font-size: 12px;
  color: var(--text-secondary);
  padding: 4px 0;
  margin-bottom: 8px;
  font-style: italic;
}

.chat-input-form {
  display: flex;
  gap: 8px;
  padding: 16px;
  border-top: 1px solid var(--border-color);
}

.chat-input-form input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background-color: var(--bg-tertiary);
  color: var(--text-color);
  font-size: 14px;
}

.chat-input-form input:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* Participants list */
.participants-list {
  list-style: none;
  padding: 16px;
}

.participant-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px;
  background-color: var(--bg-tertiary);
  border-radius: 8px;
  margin-bottom: 8px;
}

.participant-name {
  font-weight: 500;
}

.participant-status {
  display: flex;
  gap: 8px;
}

/* Room controls */
.room-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 16px;
  padding: 14px 16px;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.95), var(--bg-secondary));
  border-top: 1px solid var(--glass-border);
}

.controls-row {
  display: flex;
  justify-content: center;
  gap: 16px;
  width: 100%;
}

.controls-row + .controls-row {
  padding-top: 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  margin-top: 4px;
}

.control-btn {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 8px 16px;
  background-color: rgba(51, 65, 85, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  color: var(--text-color);
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 11px;
}

.control-btn:hover {
  background-color: rgba(71, 85, 105, 0.8);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.control-btn:active {
  transform: translateY(0) scale(0.97);
  box-shadow: none;
}

.control-btn.active {
  background-color: var(--danger-color);
  box-shadow: 0 0 12px rgba(220, 38, 38, 0.3);
  border-color: rgba(220, 38, 38, 0.4);
}

.control-btn.active:hover {
  background-color: var(--danger-hover);
  box-shadow: 0 0 16px rgba(220, 38, 38, 0.4);
}

.control-btn.on {
  background-color: var(--success-color);
  border-color: rgba(34, 197, 94, 0.4);
}

.control-btn.on:hover {
  background-color: #16a34a;
}

.control-btn-danger {
  background-color: var(--danger-color);
  border-color: rgba(220, 38, 38, 0.4);
}

.control-btn-danger:hover {
  background-color: var(--danger-hover);
  box-shadow: 0 0 16px rgba(220, 38, 38, 0.4);
}

.badge-beta {
  position: absolute;
  top: 4px;
  right: 4px;
  background: var(--primary-color);
  color: #fff;
  font-size: 8px;
  font-weight: 700;
  padding: 1px 4px;
  border-radius: 4px;
  letter-spacing: 0.5px;
  line-height: 1.2;
}

.control-icon {
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.control-icon svg {
  display: block;
}

.control-label {
  font-size: 12px;
  color: var(--text-secondary);
}

/* Toast notifications */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
}

.toast {
  background: rgba(30, 41, 59, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 12px 20px;
  margin-bottom: 8px;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
  animation: slideIn 0.3s ease;
}

.toast.success {
  border-color: var(--success-color);
}

.toast.error {
  border-color: var(--danger-color);
}

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

/* About Modal */
.about-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}
.about-modal {
  background: var(--bg-secondary, #1e293b);
  border-radius: 12px;
  width: 480px;
  max-width: 90vw;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.about-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.about-modal-header h2 {
  margin: 0;
  font-size: 18px;
}
.about-modal-body {
  padding: 20px;
}
.about-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.about-feature {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.about-feature-icon {
  font-size: 24px;
  flex-shrink: 0;
  width: 32px;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
}
.about-feature strong {
  color: var(--text-primary, #f1f5f9);
}
.about-feature > div {
  min-width: 0;
  overflow-wrap: break-word;
}

.about-feature span {
  color: var(--text-secondary, #94a3b8);
  font-size: 13px;
  line-height: 1.4;
}

/* AI Participant */
.ai-participant {
  background: linear-gradient(135deg, var(--primary-color), #7c3aed);
}

.ai-participant .ai-avatar {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ai-participant.speaking {
  box-shadow: 0 0 0 3px var(--success-color);
  animation: pulse 1.5s ease-in-out infinite;
}

.ai-participant.typing::after {
  content: 'Thinking...';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: rgba(0, 0, 0, 0.7);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 14px;
  animation: blink 1s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 0 0 3px var(--success-color);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(34, 197, 94, 0.5);
  }
}

@keyframes blink {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* AI Chat message styling */
.chat-message.ai-message {
  background-color: rgba(79, 70, 229, 0.1);
  border-left: 3px solid var(--primary-color);
  padding: 8px;
  border-radius: 4px;
  margin-left: -8px;
}

.chat-message.ai-message .chat-username {
  color: var(--primary-color);
}

/* Talk to AI button */
.talk-to-ai-btn {
  background: linear-gradient(135deg, var(--primary-color), #7c3aed);
}

.talk-to-ai-btn:hover {
  background: linear-gradient(135deg, var(--primary-hover), #6d28d9);
}

.talk-to-ai-btn.listening {
  background: linear-gradient(135deg, var(--success-color), #16a34a);
  animation: pulse-btn 1s ease-in-out infinite;
}

@keyframes pulse-btn {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

/* Listening text overlay */
.listening-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: rgba(0, 0, 0, 0.8);
  color: var(--text-color);
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 14px;
  max-width: 80%;
  text-align: center;
  border: 2px solid var(--success-color);
}

/* Stats panel */
.stats-panel {
  position: fixed;
  top: 60px;
  right: 16px;
  bottom: 90px;
  width: 420px;
  max-width: calc(100vw - 32px);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  z-index: 250;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

.stats-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
  font-size: 14px;
}

.stats-close-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 20px;
  cursor: pointer;
  padding: 0 4px;
}

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

.stats-panel-body {
  flex: 1;
  overflow-y: auto;
  padding: 12px 16px;
  font-size: 12px;
  font-family: 'SF Mono', 'Fira Code', 'Fira Mono', Menlo, monospace;
  line-height: 1.6;
}

.stats-section {
  margin-bottom: 16px;
}

.stats-section-title {
  font-weight: 600;
  font-size: 13px;
  color: var(--primary-color);
  margin-bottom: 6px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.stats-table {
  width: 100%;
  border-collapse: collapse;
}

.stats-table td {
  padding: 2px 0;
  vertical-align: top;
}

.stats-table td:first-child {
  color: var(--text-secondary);
  padding-right: 12px;
  white-space: nowrap;
  width: 1%;
}

.stats-table td:last-child {
  color: var(--text-color);
  word-break: break-all;
}

/* CSS tooltips for stats labels */
.has-tip {
  position: relative;
  cursor: pointer;
  border-bottom: 1px dotted var(--text-secondary);
}

.has-tip .tip-popup {
  display: none;
  position: absolute;
  left: 0;
  bottom: 100%;
  margin-bottom: 6px;
  background-color: var(--bg-color);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 12px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  white-space: normal;
  width: max-content;
  max-width: 260px;
  z-index: 300;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  line-height: 1.4;
}

.has-tip.tip-open .tip-popup {
  display: block;
}

.stats-candidate {
  padding: 4px 8px;
  margin: 2px 0;
  background-color: var(--bg-tertiary);
  border-radius: 4px;
  font-size: 11px;
}

.stats-candidate.active {
  border-left: 3px solid var(--success-color);
}

/* Settings panel */
.settings-panel {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  max-width: calc(100vw - 32px);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  z-index: 250;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

.settings-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
  font-size: 14px;
}

.settings-panel-body {
  padding: 16px;
}

.settings-group {
  margin-bottom: 10px;
}

.settings-group:last-child {
  margin-bottom: 0;
}

.settings-codec-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.settings-codec-row .settings-select {
  flex-shrink: 0;
  width: 220px;
}

.settings-codec-desc {
  font-size: 11px;
  color: #64748b;
  line-height: 1.4;
  flex: 1;
  min-width: 0;
}

.settings-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.settings-select {
  width: 220px;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background-color: var(--bg-tertiary);
  color: var(--text-color);
  font-size: 14px;
  cursor: pointer;
}

.settings-select:focus {
  outline: none;
  border-color: var(--primary-color);
}

/* Topology panel */
.panel-container {
  position: fixed;
  top: 60px;
  left: 16px;
  right: 16px;
  bottom: 90px;
  z-index: 200;
  display: flex;
  gap: 12px;
}

.topology-panel {
  flex: 1;
  min-width: 0;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

.topology-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  font-weight: 600;
  font-size: 14px;
}

.topology-panel-body {
  flex: 1;
  overflow: auto;
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 16px;
  min-height: 0;
}

.topo-svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  pointer-events: none;
}

.topo-canvas {
  flex: 1;
  position: relative;
  z-index: 1;
  min-height: 300px;
}

.topo-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  min-width: 60px;
  position: absolute;
  transform: translate(-50%, -50%);
  z-index: 1;
  cursor: pointer;
  transition: transform 0.15s ease, filter 0.15s ease;
}

.topo-node:not(.topo-node-placeholder):hover {
  transform: translate(-50%, -50%) scale(1.12);
  filter: brightness(1.2);
}

.topo-node:not(.topo-node-placeholder):hover .topo-node-icon {
  box-shadow: 0 0 12px rgba(248, 250, 252, 0.4);
}

.topo-node-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  border: 2px solid #f8fafc;
  flex-shrink: 0;
  transition: box-shadow 0.15s ease;
}

.topo-node-icon.server {
  width: 56px;
  height: 34px;
  border-radius: 8px;
  font-size: 16px;
  border-width: 1.5px;
}

.topo-node-icon.self { background: #4f46e5; }
.topo-node-icon.peer { background: #22c55e; }
.topo-node-icon.infrastructure { background: #94a3b8; }
.topo-node-icon.stun { background: #eab308; }
.topo-node-icon.turn { background: #f97316; }

.topo-node-label {
  text-align: center;
  font-size: 11px;
  line-height: 1.3;
  color: #f8fafc;
  overflow-wrap: break-word;
  word-break: break-word;
  max-width: 180px;
}

.topo-node-label .topo-name {
  font-weight: 600;
  font-size: 12px;
}

.topo-node-label .topo-detail {
  color: #94a3b8;
  font-size: 10px;
}

.topo-node-label .topo-time {
  color: #64748b;
  font-size: 9px;
}

.topo-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 8px;
  border-top: 1px solid rgba(148, 163, 184, 0.2);
  position: relative;
  z-index: 1;
  align-self: end;
}

.topo-legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  white-space: nowrap;
}

.topo-legend-line {
  width: 20px;
  height: 0;
  border-top: 2px solid;
}

.topo-legend-line.dashed {
  border-top-style: dashed;
}

/* Topology stats popup */
.topo-stats-popup {
  position: fixed;
  background: #0a0e1a;
  border: 1px solid #3b4d7a;
  border-radius: 8px;
  padding: 14px 28px 14px 18px;
  font-size: 13px;
  font-family: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  color: #e2e8f0;
  z-index: 400;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
  min-width: 360px;
  max-width: 480px;
  max-height: 70vh;
  overflow-y: auto;
  line-height: 1.6;
  pointer-events: auto;
}

.topo-popup-close {
  position: absolute;
  top: 8px;
  right: 8px;
  background: none;
  border: none;
  color: #64748b;
  font-size: 18px;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
}

.topo-popup-close:hover {
  color: #e2e8f0;
}

.topo-stats-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid #2a3354;
}

.topo-stats-name {
  font-weight: 600;
  font-size: 14px;
}

.topo-stats-badge {
  margin-left: auto;
  font-size: 11px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 10px;
  white-space: nowrap;
}

.topo-stats-badge.good { background: rgba(16, 185, 129, 0.15); color: #10b981; }
.topo-stats-badge.warn { background: rgba(245, 158, 11, 0.15); color: #f59e0b; }
.topo-stats-badge.crit { background: rgba(239, 68, 68, 0.15); color: #ef4444; }

.topo-stats-row {
  display: flex;
  justify-content: space-between;
  padding: 2px 0;
  gap: 12px;
}

.topo-stats-row.wrap {
  flex-direction: column;
  gap: 0;
}

.topo-stats-label {
  color: #64748b;
  white-space: nowrap;
  flex-shrink: 0;
}

.topo-stats-value {
  color: #e2e8f0;
  font-weight: 500;
  text-align: right;
  word-break: break-all;
}

.topo-stats-row.wrap .topo-stats-value {
  text-align: left;
  padding-left: 12px;
  font-size: 11px;
  color: #94a3b8;
}

.topo-stats-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.topo-stats-dot.green { background: #10b981; box-shadow: 0 0 6px rgba(16, 185, 129, 0.4); }
.topo-stats-dot.yellow { background: #f59e0b; box-shadow: 0 0 6px rgba(245, 158, 11, 0.4); }
.topo-stats-dot.red { background: #ef4444; box-shadow: 0 0 6px rgba(239, 68, 68, 0.4); }

.topo-stats-explain {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.5;
  color: #94a3b8;
}

/* Edge popup channel styles */
.topo-edge-section {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #64748b;
  margin-top: 10px;
  margin-bottom: 4px;
  padding-top: 6px;
  border-top: 1px solid #1e293b;
}

.topo-edge-channel {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 3px 0;
  font-size: 12px;
}

.topo-edge-kind {
  font-weight: 600;
  color: #e2e8f0;
  min-width: 70px;
}

.topo-edge-dir {
  color: #94a3b8;
  font-size: 11px;
  min-width: 80px;
}

.topo-edge-state {
  color: #64748b;
  font-size: 11px;
}

.topo-edge-state em {
  font-style: normal;
  color: #94a3b8;
}

/* SDP Inspector */
.sdp-inspector-entry {
  margin-bottom: 4px;
}

.sdp-inspector-toggle {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 5px 8px;
  background: #141926;
  border: 1px solid #1e293b;
  border-radius: 4px;
  color: #94a3b8;
  font-size: 11px;
  font-family: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s, border-color 0.15s;
}

.sdp-inspector-toggle::before {
  content: '\25B6';
  margin-right: 6px;
  font-size: 8px;
  transition: transform 0.2s;
}

.sdp-inspector-toggle.open::before {
  transform: rotate(90deg);
}

.sdp-inspector-toggle:hover {
  background: #1a2035;
  border-color: #3b4d7a;
  color: #e2e8f0;
}

.sdp-inspector-raw {
  display: none;
  margin: 0;
  padding: 8px 10px;
  background: #0d1117;
  border: 1px solid #1e293b;
  border-top: none;
  border-radius: 0 0 4px 4px;
  color: #8b949e;
  font-size: 10px;
  font-family: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 300px;
  overflow-y: auto;
}

.sdp-inspector-raw.expanded {
  display: block;
}

.sdp-inspector-raw::-webkit-scrollbar { width: 5px; }
.sdp-inspector-raw::-webkit-scrollbar-track { background: transparent; }
.sdp-inspector-raw::-webkit-scrollbar-thumb { background: #2a3354; border-radius: 3px; }
.sdp-inspector-raw::-webkit-scrollbar-thumb:hover { background: #3b4d7a; }

/* SDP Reference popup */
.sdp-reference-body {
  margin-top: 8px;
}
.sdp-ref-section-header {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  color: #60a5fa;
  margin: 12px 0 4px;
  padding: 4px 0;
  border-top: 1px solid rgba(96, 165, 250, 0.2);
}
.sdp-ref-line {
  margin: 2px 0;
  padding: 3px 6px;
  border-radius: 3px;
  transition: background 0.15s;
}
.sdp-ref-line:hover {
  background: rgba(96, 165, 250, 0.08);
}
.sdp-ref-code {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 11px;
  color: #e2e8f0;
  word-break: break-all;
  display: block;
}
.sdp-ref-annotation {
  font-size: 10px;
  color: #94a3b8;
  display: block;
  padding-left: 12px;
  margin-top: 1px;
  font-style: italic;
}

/* Topology hint */
.topo-hint {
  position: absolute;
  top: 8px;
  right: 12px;
  font-size: 11px;
  font-style: italic;
  color: #94a3b8;
  pointer-events: none;
  white-space: nowrap;
}

/* TURN placeholder (upper-left, semi-transparent) */
.topo-node.topo-node-placeholder {
  opacity: 0.35;
  cursor: default;
}

/* Animated flowing edges */
@keyframes topo-edge-flow {
  from { stroke-dashoffset: 24; }
  to { stroke-dashoffset: 0; }
}

.topo-edge-animated {
  animation: topo-edge-flow 0.8s linear infinite;
}

@keyframes topo-edge-flow-reverse {
  from { stroke-dashoffset: 0; }
  to { stroke-dashoffset: 24; }
}

.topo-edge-animated-reverse {
  animation: topo-edge-flow-reverse 0.8s linear infinite;
}

/* Configurations popup — ad-hoc SFU topology grid */
.config-popup-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}

.config-popup {
  background: #0a0e1a;
  border: 1px solid #3b4d7a;
  border-radius: 12px;
  padding: 20px;
  max-width: 640px;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.7);
  font-family: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  color: #e2e8f0;
}

.config-popup-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid #2a3354;
}

.config-popup-title {
  font-size: 15px;
  font-weight: 600;
}

.config-popup-subtitle {
  font-size: 11px;
  color: #64748b;
  margin-top: 4px;
}

.config-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 12px;
}

.config-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: #141926;
  border: 1px solid #1e293b;
  border-radius: 8px;
  padding: 10px 6px 8px;
  transition: border-color 0.15s, background 0.15s;
}

.config-card:hover {
  border-color: #3b4d7a;
  background: #1a2035;
}

.config-card svg {
  display: block;
}

.config-card-label {
  font-size: 10px;
  color: #94a3b8;
  margin-top: 6px;
  text-align: center;
  line-height: 1.3;
}

/* Dashboard panel — Mercury NOC aesthetic */
.dashboard-panel {
  --dash-bg: #0a0e1a;
  --dash-card: #1a2035;
  --dash-card-hover: #1f2847;
  --dash-border: #2a3354;
  --dash-border-accent: #3b4d7a;
  --dash-text: #e2e8f0;
  --dash-text-secondary: #94a3b8;
  --dash-text-muted: #64748b;
  --dash-cyan: #06b6d4;
  --dash-green: #10b981;
  --dash-yellow: #f59e0b;
  --dash-red: #ef4444;
  --dash-purple: #8b5cf6;
  --dash-blue: #3b82f6;
  --dash-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;

  flex: 1;
  min-width: 0;
  background: var(--dash-bg);
  border: 1px solid var(--dash-border);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
  overflow: hidden;
}

.dashboard-panel ::-webkit-scrollbar { width: 6px; height: 6px; }
.dashboard-panel ::-webkit-scrollbar-track { background: transparent; }
.dashboard-panel ::-webkit-scrollbar-thumb { background: var(--dash-border); border-radius: 3px; }
.dashboard-panel ::-webkit-scrollbar-thumb:hover { background: var(--dash-border-accent); }

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  border-bottom: 1px solid var(--dash-border);
  font-weight: 600;
  font-size: 15px;
  background: var(--dash-card);
  color: var(--dash-text);
}

.dashboard-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.dash-live-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  font-weight: 600;
  color: var(--dash-green);
  letter-spacing: 1px;
}

.dash-live-dot {
  width: 8px;
  height: 8px;
  background: var(--dash-green);
  border-radius: 50%;
  animation: dashPulse 2s ease-in-out infinite;
}

@keyframes dashPulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
  50% { opacity: 0.7; box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
}

@keyframes dashValueFlash {
  0% { color: var(--dash-cyan); }
  100% { color: inherit; }
}

.dash-value-updated {
  animation: dashValueFlash 0.5s ease;
}

.dashboard-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  background: var(--dash-bg);
}

/* KPI Bar */
.dash-kpi-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.dash-kpi-card {
  background: var(--dash-card);
  border: 1px solid var(--dash-border);
  border-radius: 8px;
  padding: 16px;
  transition: border-color 0.3s, background 0.3s;
}

.dash-kpi-card:hover {
  border-color: var(--dash-border-accent);
}

.dash-kpi-card.accent {
  border-color: rgba(6, 182, 212, 0.3);
  background: rgba(6, 182, 212, 0.05);
}

.dash-kpi-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.dash-kpi-label {
  font-size: 11px;
  color: var(--dash-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
}

.dash-health-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.dash-health-dot.green { background: var(--dash-green); box-shadow: 0 0 8px rgba(16, 185, 129, 0.4); }
.dash-health-dot.yellow { background: var(--dash-yellow); box-shadow: 0 0 8px rgba(245, 158, 11, 0.4); }
.dash-health-dot.red { background: var(--dash-red); box-shadow: 0 0 8px rgba(239, 68, 68, 0.4); }

.dash-kpi-value {
  font-family: var(--dash-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--dash-text);
  line-height: 1.1;
  margin-bottom: 2px;
  transition: color 0.3s;
}

.dash-kpi-card.accent .dash-kpi-value {
  color: var(--dash-cyan);
}

.dash-kpi-sub {
  font-size: 11px;
  color: var(--dash-text-muted);
  font-family: var(--dash-mono);
}

/* Quality colors */
.dash-quality-good { color: var(--dash-green); }
.dash-quality-warn { color: var(--dash-yellow); }
.dash-quality-crit { color: var(--dash-red); }

/* Group analytics section */
.dash-group-section {
  margin-bottom: 20px;
  background: var(--dash-card);
  border: 1px solid var(--dash-border);
  border-radius: 8px;
  padding: 20px;
  position: relative;
  overflow: hidden;
}

.dash-group-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--dash-purple), var(--dash-cyan));
}

.dash-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--dash-border);
  flex-wrap: wrap;
  gap: 12px;
}

.dash-group-title-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.dash-group-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--dash-text);
  letter-spacing: 0.5px;
}

.dash-group-subtitle {
  font-size: 12px;
  color: var(--dash-text-muted);
  font-family: var(--dash-mono);
}

.dash-health-summary {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.dash-health-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--dash-text-secondary);
  font-weight: 500;
}

/* Peer sections */
.dash-peer-section {
  margin-bottom: 16px;
  background: var(--dash-card);
  border: 1px solid var(--dash-border);
  border-radius: 8px;
  padding: 20px;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.dash-peer-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--dash-cyan);
}

.dash-peer-section:hover {
  border-color: var(--dash-border-accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.dash-peer-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--dash-border);
}

.dash-peer-name {
  font-weight: 600;
  font-size: 16px;
  color: var(--dash-text);
}

.dash-peer-state {
  font-size: 12px;
  color: var(--dash-text-muted);
  font-family: var(--dash-mono);
}

.dash-quality-badge {
  margin-left: auto;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 12px;
  letter-spacing: 0.5px;
}

.dash-quality-badge.dash-quality-good { background: rgba(16, 185, 129, 0.15); color: var(--dash-green); }
.dash-quality-badge.dash-quality-warn { background: rgba(245, 158, 11, 0.15); color: var(--dash-yellow); }
.dash-quality-badge.dash-quality-crit { background: rgba(239, 68, 68, 0.15); color: var(--dash-red); }

.dash-info-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 16px;
  font-size: 11px;
  color: var(--dash-text-muted);
  font-family: var(--dash-mono);
}

.dash-info-pill {
  padding: 3px 8px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 4px;
  border: 1px solid var(--dash-border);
}

/* Metric cards grid */
.dash-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

.dash-card {
  background: var(--dash-bg);
  border: 1px solid var(--dash-border);
  border-radius: 8px;
  padding: 14px;
  transition: border-color 0.3s;
}

.dash-card:hover {
  border-color: var(--dash-border-accent);
}

.dash-video-thumb-card {
  display: inline-flex;
  flex-direction: column;
  float: right;
  margin: 0 0 12px 12px;
  width: 180px;
}

.dash-video-thumb {
  width: 100%;
  border-radius: 4px;
  margin-top: 8px;
  background: #000;
}

.dash-card-title {
  font-size: 11px;
  color: var(--dash-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
  font-weight: 500;
}

.dash-card-value {
  font-size: 22px;
  font-weight: 700;
  font-family: var(--dash-mono);
  margin-bottom: 8px;
  color: var(--dash-text);
  transition: color 0.3s;
}

.dash-card-unit {
  font-size: 12px;
  font-weight: 400;
  color: var(--dash-text-muted);
}

.dash-val-warn { color: var(--dash-yellow); }
.dash-val-crit { color: var(--dash-red); }

/* Sparkline */
.dash-sparkline {
  width: 100%;
  height: 60px;
  display: block;
  margin-bottom: 6px;
}

/* Infra-style progress bar under sparkline */
.dash-infra-bar {
  height: 4px;
  background: var(--dash-border);
  border-radius: 2px;
  margin-bottom: 8px;
  overflow: hidden;
}

.dash-infra-bar-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.5s ease;
}

/* Min / Avg / Max stats */
.dash-card-stats {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--dash-text-muted);
  font-family: var(--dash-mono);
}

/* Resolution card */
.dash-card-res {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}

.dash-res-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 8px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 4px;
}

.dash-res-label {
  font-size: 11px;
  color: var(--dash-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.dash-res-value {
  font-size: 16px;
  font-weight: 600;
  font-family: var(--dash-mono);
  color: var(--dash-text);
}

/* Data transfer card */
.dash-data-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 8px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 4px;
  margin-bottom: 4px;
}

.dash-data-label {
  font-size: 11px;
  color: var(--dash-text-muted);
}

.dash-data-value {
  font-family: var(--dash-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--dash-text);
}

.dash-empty {
  color: var(--dash-text-muted);
  text-align: center;
  padding: 48px;
  font-size: 14px;
}

/* ICE Servers section */
.dash-ice-section {
  margin-bottom: 16px;
  background: var(--dash-card);
  border: 1px solid var(--dash-border);
  border-radius: 8px;
  padding: 16px 20px;
}

.dash-ice-title {
  font-size: 12px;
  color: var(--dash-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
  margin-bottom: 10px;
}

.dash-ice-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.dash-ice-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-family: var(--dash-mono);
  color: var(--dash-text);
  padding: 4px 8px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 4px;
  transition: background 0.15s, filter 0.15s;
}

.dash-ice-type {
  font-weight: 600;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--dash-text-secondary);
  min-width: 35px;
}

.dash-ice-url {
  color: var(--dash-text-muted);
  word-break: break-all;
}

.dash-health-dot.blue {
  background: var(--dash-blue);
  box-shadow: 0 0 8px rgba(59, 130, 246, 0.4);
}

.dash-health-dot.cyan {
  background: var(--dash-cyan);
  box-shadow: 0 0 8px rgba(6, 182, 212, 0.4);
}

/* Candidate lists */
.dash-candidates-section {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--dash-border);
}

.dash-candidates-title {
  font-size: 11px;
  color: var(--dash-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
  margin-bottom: 8px;
}

.dash-candidates-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.dash-candidate-item {
  font-size: 11px;
  font-family: var(--dash-mono);
  color: var(--dash-text-muted);
  padding: 3px 8px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 3px;
  border-left: 2px solid var(--dash-border-accent);
  cursor: pointer;
  transition: background 0.15s, filter 0.15s;
}
.dash-candidate-item.active {
  border-left: 3px solid var(--success-color);
  color: var(--text-primary);
  background: rgba(34, 197, 94, 0.08);
}

/* Hover highlights for all clickable dashboard elements */
[data-explain] {
  cursor: pointer;
  transition: color 0.15s, filter 0.15s;
}

[data-explain]:hover {
  filter: brightness(1.3);
}

.dash-candidate-item:hover {
  background: rgba(255, 255, 255, 0.06);
  filter: brightness(1.2);
}

.dash-ice-count-item {
  transition: background 0.15s, filter 0.15s;
}

.dash-ice-count-item:hover {
  background: rgba(255, 255, 255, 0.06);
  filter: brightness(1.2);
}

.dash-ice-item[data-explain]:hover {
  background: rgba(255, 255, 255, 0.06);
}

.dash-summary-table th[data-explain]:hover {
  color: var(--dash-text, #e2e8f0);
}

.dash-summary-table tr:hover td {
  background: rgba(255, 255, 255, 0.04);
}

/* Received peer telemetry section */
.dash-peer-telemetry-section {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 2px solid var(--dash-border);
}

.dash-peer-telemetry-section::before {
  content: 'Remote Peer Telemetry';
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--dash-text);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.dash-peer-telemetry-time {
  margin-left: auto;
  font-size: 11px;
  color: var(--dash-text-muted);
  font-family: var(--dash-mono);
}

/* Dashboard explanation tooltip popup */
.dash-explain-popup {
  position: fixed;
  background: var(--dash-bg, #0a0e1a);
  color: var(--dash-text, #e2e8f0);
  border: 1px solid var(--dash-border-accent, #3b4d7a);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 12px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  white-space: normal;
  width: max-content;
  max-width: 300px;
  z-index: 400;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
  line-height: 1.5;
  pointer-events: auto;
}

/* Peer media summary table */
.dash-summary-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
  font-size: 11px;
  font-family: var(--dash-mono, monospace);
}

.dash-summary-table th {
  text-align: left;
  padding: 6px 8px;
  color: var(--dash-text-secondary, #94a3b8);
  font-weight: 600;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--dash-border, #2a3354);
}

.dash-summary-table td {
  padding: 5px 8px;
  color: var(--dash-text, #e2e8f0);
  border-bottom: 1px solid rgba(42, 51, 84, 0.5);
}

.dash-summary-table td.dash-res-bold {
  font-weight: 700;
  color: #f1f5f9;
  letter-spacing: 0.3px;
}

.stats-no-peers {
  color: var(--text-secondary);
  text-align: center;
  padding: 24px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 14px;
}

/* Responsive */
/* Mobile back button for sidebar (hidden on desktop) */
.sidebar-close-btn {
  display: none;
}

@media (max-width: 480px) {
  .landing-card {
    padding: 28px 20px;
  }

  .landing-card h1 {
    font-size: 28px;
  }

  .features {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .feature {
    font-size: 13px;
  }

  .feature-icon {
    width: 30px;
    height: 30px;
  }
}

@media (max-width: 768px) {
  .room-header {
    padding: 8px 12px;
  }

  .room-info {
    gap: 8px;
    min-width: 0;
    flex: 1;
  }

  .room-info h1 {
    display: none;
  }

  .room-id {
    font-size: 12px;
    padding: 2px 8px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 120px;
  }

  .participant-count {
    font-size: 13px;
    white-space: nowrap;
  }

  /* Sidebar: fullscreen overlay on mobile with back button */
  .sidebar {
    position: fixed;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 100;
    width: 100%;
    transform: translateX(100%);
  }

  .sidebar.visible {
    transform: translateX(0);
  }

  .sidebar-close-btn {
    display: block;
    width: 100%;
    background: var(--bg-tertiary);
    border: none;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-color);
    font-size: 15px;
    padding: 14px 16px;
    text-align: left;
    cursor: pointer;
    font-weight: 600;
  }

  .video-grid {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 8px;
  }

  .video-container {
    border-radius: 8px;
  }

  .room-controls {
    flex-wrap: wrap;
    gap: 6px;
    padding: 8px 12px;
    justify-content: center;
  }

  .controls-row {
    gap: 6px;
  }

  .control-btn {
    padding: 8px 12px;
    border-radius: 8px;
    min-width: 0;
  }

  .control-btn:hover {
    transform: none;
    box-shadow: none;
  }

  .control-btn:active {
    transform: scale(0.95);
  }

  .control-icon {
    font-size: 20px;
  }

  .control-label {
    display: none;
  }

  /* ============================================
     ALL PANELS: fullscreen overlays on mobile
     No horizontal scroll, close button always visible
     ============================================ */

  /* Telemetry panel */
  .stats-panel {
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
    max-width: 100vw;
    border-radius: 0;
    overflow: hidden;
  }

  .stats-panel-header {
    flex-shrink: 0;
    padding: 14px 16px;
  }

  .stats-panel-body {
    overflow-x: hidden;
  }

  /* Topology + Dashboard container */
  .panel-container {
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
    max-width: 100vw;
    flex-direction: column;
    gap: 0;
    overflow: hidden;
  }

  .topology-panel {
    border-radius: 0;
    overflow: hidden;
  }

  .topology-panel-header {
    flex-shrink: 0;
    padding: 14px 16px;
  }

  .dashboard-panel {
    border-radius: 0;
    overflow: hidden;
  }

  .dashboard-header {
    flex-shrink: 0;
    padding: 14px 16px;
  }

  .dashboard-body {
    overflow-x: hidden;
  }

  .dash-kpi-bar {
    grid-template-columns: repeat(2, 1fr);
  }

  .dash-card-grid {
    grid-template-columns: 1fr;
  }

  /* Settings panel: fullscreen on mobile */
  .settings-panel {
    width: 100vw;
    max-width: 100vw;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    transform: none;
    border-radius: 0;
    max-height: none;
    z-index: 300;
    overflow-y: auto;
  }

  .settings-codec-row {
    flex-direction: column;
    align-items: stretch;
  }

  .settings-codec-row .settings-select {
    width: 100%;
  }

  /* About modal: fullscreen on mobile */
  .about-overlay {
    align-items: stretch;
  }

  .about-modal {
    width: 100%;
    max-width: 100%;
    max-height: 100vh;
    height: 100vh;
    border-radius: 0;
    display: flex;
    flex-direction: column;
  }

  .about-modal-header {
    flex-shrink: 0;
  }

  .about-modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
  }

  .about-feature > div {
    min-width: 0;
  }

  .about-feature span {
    word-break: break-word;
  }

  /* Make ALL close/action buttons large tap targets on mobile */
  .stats-close-btn {
    font-size: 26px;
    padding: 4px 8px;
    min-width: 44px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  /* Topology node popup: responsive on mobile */
  .topo-stats-popup {
    min-width: 0;
    max-width: calc(100vw - 32px);
    max-height: 60vh;
    overflow-y: auto;
  }
}