/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #252542;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --border-radius: 12px;
  --transition: all 0.2s ease;
}

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

/* Screens */
.screen {
  display: none;
  width: 100%;
  height: 100vh;
}

.screen.active {
  display: flex;
}

/* Pre-Join Screen */
#prejoinScreen {
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.prejoin-container {
  text-align: center;
  max-width: 400px;
  padding: 2rem;
}

.prejoin-container h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  background: linear-gradient(90deg, var(--accent), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

/* Preview */
.preview-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--bg-tertiary);
  border-radius: var(--border-radius);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.preview-container video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scaleX(-1);
}

.preview-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: var(--bg-tertiary);
}

.preview-placeholder.hidden {
  display: none;
}

.avatar-large {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.preview-controls {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.5rem;
}

/* Join Form */
.join-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.join-form input {
  padding: 1rem;
  border: 2px solid var(--bg-tertiary);
  border-radius: var(--border-radius);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 1rem;
  transition: var(--transition);
}

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

.primary-btn {
  padding: 1rem 2rem;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.primary-btn:hover {
  background: var(--accent-hover);
}

.primary-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.hint {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-top: 1rem;
}

/* Meeting Screen */
#meetingScreen {
  flex-direction: column;
}

.meeting-container {
  flex: 1;
  display: flex;
  position: relative;
  overflow: hidden;
}

/* Video Grid */
.video-grid {
  flex: 1;
  display: grid;
  gap: 8px;
  padding: 8px;
  grid-template-columns: repeat(var(--cols, 1), 1fr);
  grid-template-rows: repeat(var(--rows, 1), 1fr);
}

.video-container {
  position: relative;
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  overflow: hidden;
  min-height: 150px;
}

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

.video-container.local video {
  transform: scaleX(-1);
}

.video-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.name-badge {
  position: absolute;
  bottom: 8px;
  left: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: rgba(0, 0, 0, 0.6);
  border-radius: 20px;
  font-size: 0.875rem;
}

.name-badge .avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 0.75rem;
}

.mic-indicator {
  opacity: 0.7;
}

.mic-indicator.muted {
  color: var(--danger);
}

/* No Video Placeholder */
.no-video {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: var(--bg-secondary);
}

.no-video.hidden {
  display: none;
}

/* Speaking Indicator */
.video-container.speaking {
  box-shadow: 0 0 0 3px var(--success);
  animation: pulse-border 1.5s ease-in-out infinite;
}

@keyframes pulse-border {
  0%, 100% { box-shadow: 0 0 0 3px var(--success); }
  50% { box-shadow: 0 0 0 5px var(--success); }
}

/* Quality Badge */
.quality-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 4px 8px;
  background: rgba(0, 0, 0, 0.6);
  border-radius: 12px;
}

.quality-dot {
  display: block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-secondary);
}

.quality-dot.excellent {
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
}

.quality-dot.good {
  background: var(--warning);
  box-shadow: 0 0 6px var(--warning);
}

.quality-dot.poor {
  background: var(--danger);
  box-shadow: 0 0 6px var(--danger);
  animation: blink 1s ease-in-out infinite;
}

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

/* Control Bar */
.control-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--bg-tertiary);
}

.control-left, .control-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.control-center {
  display: flex;
  align-items: center;
  gap: 8px;
}

.room-info {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.duration {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-family: monospace;
}

/* Control Buttons */
.control-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 16px;
  background: var(--bg-tertiary);
  border: none;
  border-radius: var(--border-radius);
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.control-btn:hover {
  background: #303050;
}

.control-btn .icon,
.control-btn .icon-on,
.control-btn .icon-off {
  font-size: 1.25rem;
}

.control-btn .icon-off {
  display: none;
}

.control-btn:not(.active) .icon-on {
  display: none;
}

.control-btn:not(.active) .icon-off {
  display: inline;
  color: var(--danger);
}

.control-btn .label {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.control-btn.danger {
  background: var(--danger);
}

.control-btn.danger:hover {
  background: #dc2626;
}

.control-btn .badge {
  position: absolute;
  top: 4px;
  right: 4px;
  min-width: 18px;
  height: 18px;
  padding: 0 4px;
  background: var(--danger);
  border-radius: 9px;
  font-size: 0.7rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.badge.hidden {
  display: none;
}

.icon-btn {
  width: 40px;
  height: 40px;
  background: var(--bg-tertiary);
  border: none;
  border-radius: 8px;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 1.25rem;
  transition: var(--transition);
}

.icon-btn:hover {
  background: #303050;
}

/* Side Panels */
.side-panel {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 320px;
  background: var(--bg-secondary);
  border-left: 1px solid var(--bg-tertiary);
  display: none;
  flex-direction: column;
}

.side-panel.open {
  display: flex;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px;
  border-bottom: 1px solid var(--bg-tertiary);
}

.panel-header h3 {
  font-size: 1rem;
}

.close-btn {
  width: 32px;
  height: 32px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1.5rem;
  transition: var(--transition);
}

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

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

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

.chat-message .sender {
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 4px;
}

.chat-message .text {
  background: var(--bg-tertiary);
  padding: 8px 12px;
  border-radius: 8px;
  word-break: break-word;
}

.chat-message .time {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.chat-message.system {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.chat-message.system .text {
  background: transparent;
  padding: 0;
}

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

.chat-input input {
  flex: 1;
  padding: 10px;
  background: var(--bg-tertiary);
  border: none;
  border-radius: 8px;
  color: var(--text-primary);
}

.chat-input input:focus {
  outline: 2px solid var(--accent);
}

.chat-input button {
  padding: 10px 16px;
  background: var(--accent);
  border: none;
  border-radius: 8px;
  color: white;
  cursor: pointer;
  transition: var(--transition);
}

.chat-input button:hover {
  background: var(--accent-hover);
}

/* Participants */
.participants-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.participant-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: 8px;
  transition: var(--transition);
}

.participant-item:hover {
  background: var(--bg-tertiary);
}

.participant-item .avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: 600;
}

.participant-item .info {
  flex: 1;
}

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

.participant-item .status {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.participant-item .indicators {
  display: flex;
  gap: 8px;
  font-size: 1rem;
  opacity: 0.7;
}

.indicator.off {
  color: var(--danger);
}

/* Toast */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 20px;
  background: var(--bg-secondary);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  animation: slideIn 0.3s ease;
}

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

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

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

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

/* Loading */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 15, 26, 0.9);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 2000;
}

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

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--bg-tertiary);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 16px;
}

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

/* Responsive */
@media (max-width: 768px) {
  .control-bar {
    padding: 8px 12px;
  }

  .control-left, .control-right {
    display: none;
  }

  .control-btn .label {
    display: none;
  }

  .control-btn {
    padding: 12px;
  }

  .side-panel {
    width: 100%;
  }

  .video-grid {
    grid-template-columns: 1fr !important;
  }
}

/* Screen share layout */
.video-grid.has-screen-share {
  grid-template-columns: 2fr 1fr !important;
}

.video-container.screen-share {
  grid-row: span 3;
}

/* Spotlight/Pin Layout */
.video-grid.has-spotlight {
  grid-template-columns: 2fr 1fr !important;
}

.video-container.spotlighted {
  grid-row: span 3;
  order: -1;
}

.video-container.spotlighted .spotlight-badge {
  display: block;
}

.spotlight-badge {
  display: none;
  position: absolute;
  top: 8px;
  left: 8px;
  padding: 4px 8px;
  background: var(--accent);
  border-radius: 12px;
  font-size: 0.75rem;
}

/* Video Actions (on hover) */
.video-actions {
  position: absolute;
  top: 8px;
  right: 40px;
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: var(--transition);
}

.video-container:hover .video-actions {
  opacity: 1;
}

.video-actions button {
  width: 32px;
  height: 32px;
  background: rgba(0, 0, 0, 0.6);
  border: none;
  border-radius: 8px;
  color: var(--text-primary);
  cursor: pointer;
  font-size: 0.875rem;
  transition: var(--transition);
}

.video-actions button:hover {
  background: rgba(0, 0, 0, 0.8);
}

.video-actions button.active {
  background: var(--accent);
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 3000;
  display: flex;
  justify-content: center;
  align-items: center;
}

.modal.hidden {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
}

.modal-content {
  position: relative;
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  display: flex;
  flex-direction: column;
  animation: modalIn 0.2s ease;
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--bg-tertiary);
}

.modal-header h2 {
  font-size: 1.25rem;
  font-weight: 600;
}

.modal-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

.modal-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--bg-tertiary);
  display: flex;
  justify-content: flex-end;
}

/* Settings Sections */
.settings-section {
  margin-bottom: 24px;
}

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

.settings-section h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.setting-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.setting-row:last-child {
  margin-bottom: 0;
}

.setting-row label {
  min-width: 100px;
  font-size: 0.875rem;
}

.setting-row select {
  flex: 1;
  padding: 10px 12px;
  background: var(--bg-tertiary);
  border: 1px solid transparent;
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
}

.setting-row select:focus {
  outline: none;
  border-color: var(--accent);
}

.checkbox-row {
  flex-direction: row-reverse;
  justify-content: flex-end;
}

.checkbox-row label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  min-width: auto;
}

.checkbox-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
}

/* Audio Level Meter */
.audio-level-meter {
  flex: 1;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
}

.level-bar {
  height: 100%;
  background: var(--success);
  width: 0;
  transition: width 0.1s ease;
}

/* Settings Preview Video */
.settings-preview {
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--bg-tertiary);
  border-radius: 8px;
  overflow: hidden;
  margin-top: 12px;
}

.settings-preview video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scaleX(-1);
}

/* Push-to-Talk Indicator */
.ptt-indicator {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 24px;
  background: var(--accent);
  border-radius: 20px;
  font-weight: 600;
  animation: pttPulse 0.5s ease infinite;
  z-index: 1500;
}

.ptt-indicator.hidden {
  display: none;
}

@keyframes pttPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* Light Theme */
[data-theme="light"] {
  --bg-primary: #f5f5f7;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e5e5ea;
  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
}

[data-theme="light"] .modal-backdrop {
  background: rgba(0, 0, 0, 0.4);
}

[data-theme="light"] .video-container {
  background: var(--bg-tertiary);
}

[data-theme="light"] .name-badge,
[data-theme="light"] .quality-badge,
[data-theme="light"] .video-actions button {
  background: rgba(255, 255, 255, 0.9);
  color: var(--text-primary);
}

[data-theme="light"] .toast {
  background: var(--bg-secondary);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}