/* Google Fonts: Inter */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  /* Color Palette from DESIGN (4).md */
  --surface: #f8f9fa;
  --surface-dim: #d9dadb;
  --surface-bright: #f8f9fa;
  --surface-container-lowest: #ffffff;
  --surface-container-low: #f3f4f5;
  --surface-container: #edeeef;
  --surface-container-high: #e7e8e9;
  --surface-container-highest: #e1e3e4;
  --on-surface: #191c1d;
  --on-surface-variant: #454652;
  --inverse-surface: #2e3132;
  --inverse-on-surface: #f0f1f2;
  --outline: #767683;
  --outline-variant: #c6c5d4;
  
  --primary: #1a237e; /* Deep Indigo */
  --on-primary: #ffffff;
  --primary-container: #1a237e;
  --on-primary-container: #8690ee;
  
  --secondary: #0056c5;
  --on-secondary: #ffffff;
  --secondary-container: #0f6df3;
  --on-secondary-container: #fefcff;
  
  --accent: #2979ff; /* Bright Blue */
  --error: #ba1a1a;
  --on-error: #ffffff;
  --error-container: #ffdad6;
  --on-error-container: #93000a;

  /* Custom Video Stage Theme */
  --stage-bg: #0b0e2b; /* Darker Indigo for video stage */
  --tile-bg: #141846;
  --tile-glass: rgba(11, 14, 43, 0.4);
  
  /* Typography scales */
  --font-family: 'Inter', sans-serif;
  
  /* Corner Radii */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;      /* Default */
  --radius-lg: 0.75rem;     /* Major containers & video tiles (12px) */
  --radius-xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Spacing */
  --spacing-1: 8px;
  --spacing-2: 16px;
  --spacing-3: 24px;
  --spacing-4: 32px;
  --spacing-5: 48px;
  --spacing-6: 64px;
}

/* Reset and Global Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
}

body {
  background-color: var(--surface);
  color: var(--on-surface);
  line-height: 1.5;
  overflow-x: hidden;
}

/* Main layouts */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
}

/* Lobby Page Styles */
.lobby-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #0b0e2b 0%, #1a237e 100%);
  padding: var(--spacing-2);
}

.lobby-card {
  background: var(--surface-container-lowest);
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 32px -4px rgba(0, 0, 0, 0.15);
  width: 100%;
  max-width: 900px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  overflow: hidden;
  border: 1px solid rgba(26, 35, 126, 0.1);
}

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

.lobby-preview-section {
  background: #0b0e2b;
  padding: var(--spacing-3);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  min-height: 320px;
}

.preview-title {
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-2);
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 10;
}

.preview-video-container {
  flex: 1;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #141846;
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-video-container video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scaleX(-1); /* Mirror effect for self preview */
}

.preview-placeholder {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.6);
  gap: 12px;
  font-size: 0.9rem;
}

.preview-placeholder svg {
  width: 48px;
  height: 48px;
  fill: currentColor;
}

.preview-controls {
  position: absolute;
  bottom: var(--spacing-3);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--spacing-1);
  z-index: 10;
}

.btn-circle {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  border: none;
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  backdrop-filter: blur(8px);
  transition: all 0.2s ease;
}

.btn-circle:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.05);
}

.btn-circle.active {
  background: var(--accent);
}

.btn-circle.danger-toggle {
  background: var(--error);
}

.lobby-form-section {
  padding: var(--spacing-3) var(--spacing-4);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.lobby-logo {
  color: var(--primary);
  font-weight: 700;
  font-size: 1.8rem;
  margin-bottom: var(--spacing-1);
  display: flex;
  align-items: center;
  gap: 10px;
}

.lobby-subtitle {
  color: var(--on-surface-variant);
  font-size: 0.95rem;
  margin-bottom: var(--spacing-3);
}

.form-group {
  margin-bottom: var(--spacing-2);
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--on-surface);
  margin-bottom: 6px;
}

.form-input, .form-select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--on-surface);
  background-color: var(--surface-container-lowest);
  transition: all 0.2s ease;
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(41, 121, 255, 0.2);
}

.lobby-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: var(--spacing-3);
}

.btn-primary {
  background-color: var(--primary);
  color: var(--on-primary);
  border: none;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-primary:hover {
  background-color: #12185c;
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--secondary);
  border: 1.5px solid var(--accent);
  padding: 11px 24px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-secondary:hover {
  background-color: rgba(41, 121, 255, 0.05);
  transform: translateY(-1px);
}

/* Modal and password dialogs */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(11, 14, 43, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  backdrop-filter: blur(6px);
}

.modal-content {
  background: var(--surface-container-lowest);
  border-radius: var(--radius-lg);
  padding: var(--spacing-3) var(--spacing-4);
  width: 100%;
  max-width: 420px;
  box-shadow: 0 12px 32px -4px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(26, 35, 126, 0.1);
  text-align: center;
}

.modal-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--primary-fixed-dim);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-2);
}

.modal-icon svg {
  width: 28px;
  height: 28px;
}

.modal-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--primary);
}

.modal-description {
  font-size: 0.9rem;
  color: var(--on-surface-variant);
  margin-bottom: var(--spacing-2);
}

/* Call Room Layout */
.room-container {
  display: grid;
  grid-template-columns: 1fr;
  height: 100vh;
  width: 100vw;
  background-color: var(--stage-bg);
  position: relative;
  overflow: hidden;
}

/* Shift when sidebar is active */
.room-container.sidebar-open {
  grid-template-columns: 1fr 380px;
}

@media (max-width: 900px) {
  .room-container.sidebar-open {
    grid-template-columns: 1fr;
  }
  .room-sidebar {
    position: absolute;
    right: 0;
    top: 0;
    height: calc(100% - 80px);
    width: 320px;
    z-index: 50;
    box-shadow: -8px 0 24px rgba(0, 0, 0, 0.25);
  }
}

/* The Stage - Video Area */
.room-stage {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  width: 100%;
  padding: var(--spacing-2);
  padding-bottom: 96px; /* Space for control dock */
  overflow: hidden;
  justify-content: center;
  align-items: center;
}

/* Dynamic Grid for Video Tiles */
.video-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-content: center;
  gap: var(--spacing-2);
  width: 100%;
  height: 100%;
  max-width: 1400px;
  overflow-y: auto;
}

/* Video tile styles */
.video-tile {
  position: relative;
  aspect-ratio: 16/9;
  min-width: 240px;
  max-width: 640px;
  flex: 1 1 300px;
  background: var(--tile-bg);
  border-radius: var(--radius-lg); /* 12px */
  overflow: hidden;
  border: 2px solid transparent;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Maximize when only 1 or 2 videos */
.video-grid[data-count="1"] .video-tile {
  flex: 0 1 80%;
  max-width: 960px;
  aspect-ratio: 16/9;
}

.video-grid[data-count="2"] .video-tile {
  flex: 1 1 45%;
  max-width: 600px;
}

/* Active Speaker Border Pulsing */
.video-tile.active-speaker {
  border-color: var(--accent); /* Bright Blue */
  box-shadow: 0 0 16px rgba(41, 121, 255, 0.6);
}

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

.video-tile.mirrored video {
  transform: scaleX(-1);
}

/* Screen sharing is not mirrored */
.video-tile.screen-share-tile video {
  object-fit: contain;
}

/* Glassmorphic Overlay on Video */
.tile-overlay {
  position: absolute;
  bottom: var(--spacing-1);
  left: var(--spacing-1);
  right: var(--spacing-1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(11, 14, 43, 0.4);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 6px 12px;
  border-radius: var(--radius-md);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid rgba(255, 255, 255, 0.08);
  pointer-events: auto;
}

.tile-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 70%;
  font-weight: 600;
}

.tile-indicators {
  display: flex;
  gap: 6px;
}

.indicator-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.15);
  color: #ffffff;
}

.indicator-badge.muted {
  background: var(--error);
}

/* Video turned off preview state inside grid */
.video-off-avatar {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--tile-bg);
  color: #ffffff;
  font-size: 2.5rem;
  font-weight: 700;
  text-transform: uppercase;
}

.avatar-circle {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
  border: 2px solid rgba(255, 255, 255, 0.1);
}

/* Control Bar UI (Glassmorphic Floating Dock) */
.controls-dock {
  position: absolute;
  bottom: var(--spacing-3);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
  background: rgba(11, 14, 43, 0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 12px var(--spacing-3);
  border-radius: var(--radius-xl);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 40;
  transition: all 0.3s ease;
}

.control-btn {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  border: none;
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.control-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.05);
}

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

.control-btn.disabled-state {
  background: var(--error);
}

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

.control-btn.danger-action:hover {
  background: #a01414;
}

.control-btn svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

/* Tooltips */
.control-btn::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 60px;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: rgba(11, 14, 43, 0.9);
  color: #ffffff;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all 0.15s ease;
  pointer-events: none;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.control-btn:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* Sidebar Area */
.room-sidebar {
  background: var(--surface-container-low);
  border-left: 1px solid var(--outline-variant);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.sidebar-header {
  padding: var(--spacing-2);
  border-bottom: 1px solid var(--outline-variant);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sidebar-tabs {
  display: flex;
  gap: var(--spacing-1);
}

.tab-btn {
  background: none;
  border: none;
  padding: 6px 12px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--on-surface-variant);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.tab-btn.active {
  background: var(--primary-fixed-dim);
  color: var(--primary);
}

.tab-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.tab-panel {
  display: none;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

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

/* Chat Panel */
.chat-messages {
  flex: 1;
  padding: var(--spacing-2);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-bubble {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: var(--radius-lg);
  font-size: 0.88rem;
  position: relative;
  word-wrap: break-word;
}

.chat-bubble.incoming {
  background: var(--surface-container-lowest);
  align-self: flex-start;
  border-bottom-left-radius: var(--radius-sm);
  border: 1px solid rgba(26, 35, 126, 0.05);
}

.chat-bubble.outgoing {
  background: var(--primary-fixed-dim);
  color: var(--on-primary-fixed);
  align-self: flex-end;
  border-bottom-right-radius: var(--radius-sm);
}

.chat-bubble.system {
  background: transparent;
  color: var(--on-surface-variant);
  align-self: center;
  text-align: center;
  font-size: 0.75rem;
  font-weight: 500;
  max-width: 95%;
  padding: 2px 8px;
}

.chat-bubble-header {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-2);
  margin-bottom: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}

.chat-sender {
  color: var(--primary);
}

.chat-bubble.outgoing .chat-sender {
  color: var(--primary);
}

.chat-time {
  color: var(--on-surface-variant);
  font-weight: 400;
  font-size: 0.7rem;
}

.chat-input-area {
  padding: var(--spacing-2);
  border-top: 1px solid var(--outline-variant);
  background: var(--surface-container-lowest);
}

.chat-input-form {
  display: flex;
  gap: 8px;
}

.chat-input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  outline: none;
}

.chat-input:focus {
  border-color: var(--accent);
}

.btn-send {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: var(--primary);
  color: #ffffff;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.2s ease;
}

.btn-send:hover {
  background: #12185c;
}

/* Participants Panel */
.participants-list {
  flex: 1;
  padding: var(--spacing-2);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.participant-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px var(--spacing-2);
  background: var(--surface-container-lowest);
  border-radius: var(--radius-md);
  border: 1px solid rgba(26, 35, 126, 0.05);
}

.participant-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
}

.participant-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--primary-fixed-dim);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
}

.participant-name-text {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--on-surface);
}

.participant-status-icons {
  display: flex;
  gap: 8px;
  color: var(--on-surface-variant);
}

.participant-status-icons svg {
  width: 16px;
  height: 16px;
}

.participant-status-icons svg.muted-indicator {
  color: var(--error);
}

/* Info overlay / Toast notification system */
.toast-container {
  position: fixed;
  top: var(--spacing-2);
  right: var(--spacing-2);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 110;
}

.toast {
  background: rgba(11, 14, 43, 0.9);
  backdrop-filter: blur(8px);
  color: #ffffff;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
  font-size: 0.85rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideIn 0.3s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

@keyframes slideIn {
  from {
    transform: translateX(120%);
  }
  to {
    transform: translateX(0);
  }
}

/* Utility classes */
.hidden {
  display: none !important;
}

.status-chip {
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  background: var(--primary-fixed-dim);
  color: var(--primary);
}

.status-chip.success {
  background: #d4edda;
  color: #155724;
}

.status-chip.danger {
  background: #f8d7da;
  color: #721c24;
}

/* Loading Overlay Styles */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: radial-gradient(circle at center, #141846 0%, #0b0e2b 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.loading-overlay.fade-out {
  opacity: 0;
  visibility: hidden;
}

.loading-content {
  text-align: center;
  color: #ffffff;
  max-width: 400px;
  padding: var(--spacing-3);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.loading-spinner {
  width: 64px;
  height: 64px;
  border: 4px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: loading-spin 1s linear infinite;
  margin-bottom: var(--spacing-3);
  box-shadow: 0 0 16px rgba(41, 121, 255, 0.3);
}

.loading-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
}

.loading-subtitle {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.4;
}

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

/* Fullscreen / Maximized Video Tile Styles */
.video-tile.maximized-tile {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  max-width: 100vw !important;
  max-height: 100vh !important;
  z-index: 35 !important;
  border-radius: 0 !important;
  background: #000000 !important;
  margin: 0 !important;
  transition: all 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.video-tile.maximized-tile video {
  object-fit: contain !important;
}

.fullscreen-badge {
  background: var(--accent) !important;
  cursor: pointer;
  pointer-events: auto !important;
  transition: background 0.2s ease;
}

.fullscreen-badge:hover {
  background: #1565c0 !important;
}