/* =====================================================
   DIMMS Lab Live Hub - Activities Stylesheet
   ===================================================== */

/* CSS Variables */
:root {
  --primary-blue: #1e3a5f;
  --secondary-blue: #2d5a87;
  --accent-gold: #c9a227;
  --accent-cyan: #00bcd4;
  --light-cyan: #64ffda;

  /* Role Colors */
  --role-admin: #dc3545;
  --role-host: #ffc107;
  --role-presenter: #007bff;
  --role-member: #28a745;

  /* UI Colors */
  --bg-light: #f8f9fa;
  --bg-white: #ffffff;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --border-color: #dee2e6;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.16);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 50px;
}

/* =====================================================
   Base Styles
   ===================================================== */

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

.view {
  padding: var(--spacing-lg);
  max-width: 1400px;
  margin: 0 auto;
}

/* =====================================================
   App Header
   ===================================================== */

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--bg-white);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.app-header h1 {
  font-size: 1.25rem;
  color: var(--primary-blue);
  margin: 0;
}

.app-header-left,
.app-header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* Live Indicator */
.live-indicator {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.live-dot {
  width: 10px;
  height: 10px;
  background: var(--role-admin);
  border-radius: 50%;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.2);
  }
}

.live-indicator.offline .live-dot {
  background: var(--text-secondary);
  animation: none;
}

/* User Role Badge */
.user-role-badge {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.user-role-badge.admin {
  background: var(--role-admin);
  color: white;
}

.user-role-badge.host {
  background: var(--role-host);
  color: #212529;
}

.user-role-badge.presenter {
  background: var(--role-presenter);
  color: white;
}

.user-role-badge.member {
  background: var(--role-member);
  color: white;
}

/* =====================================================
   Loading State
   ===================================================== */

#loading-view {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--border-color);
  border-top-color: var(--accent-cyan);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* =====================================================
   Login View
   ===================================================== */

#login-view {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 70vh;
}

.login-card {
  background: var(--bg-white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  width: 100%;
  max-width: 400px;
  text-align: center;
}

.login-card h2 {
  color: var(--primary-blue);
  margin-bottom: var(--spacing-sm);
}

.login-subtitle {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

/* =====================================================
   Form Elements
   ===================================================== */

.form-group {
  margin-bottom: var(--spacing-md);
  text-align: left;
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  color: var(--text-primary);
  font-size: 0.875rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  min-height: 44px; /* Touch-friendly */
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(0, 188, 212, 0.2);
}

/* =====================================================
   Buttons
   ===================================================== */

button, .btn {
  min-height: 44px; /* Touch-friendly */
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--accent-cyan);
  color: white;
}

.btn-primary:hover {
  background: #00a0b4;
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-light);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--border-color);
}

.btn-success {
  background: var(--role-member);
  color: white;
}

.btn-success:hover {
  background: #218838;
}

.btn-danger {
  background: var(--role-admin);
  color: white;
}

.btn-danger:hover {
  background: #c82333;
}

.btn-large {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 1.1rem;
}

.btn-logout {
  background: transparent;
  color: var(--role-admin);
  border: 1px solid var(--role-admin);
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 0.875rem;
}

.btn-logout:hover {
  background: var(--role-admin);
  color: white;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* =====================================================
   Role Indicator (Login)
   ===================================================== */

.role-indicator {
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.role-indicator.admin {
  background: rgba(220, 53, 69, 0.1);
  color: var(--role-admin);
}

.role-indicator.host {
  background: rgba(255, 193, 7, 0.2);
  color: #856404;
}

.role-indicator.presenter {
  background: rgba(0, 123, 255, 0.1);
  color: var(--role-presenter);
}

.role-indicator.member {
  background: rgba(40, 167, 69, 0.1);
  color: var(--role-member);
}

/* =====================================================
   Error & Info Messages
   ===================================================== */

.error-message {
  color: var(--role-admin);
  background: rgba(220, 53, 69, 0.1);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-top: var(--spacing-md);
  font-size: 0.875rem;
}

.info-text {
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: var(--spacing-md);
}

.empty-state {
  color: var(--text-secondary);
  text-align: center;
  padding: var(--spacing-md);
  font-style: italic;
}

.empty-state-large {
  text-align: center;
  padding: var(--spacing-xl);
}

.empty-state-large .empty-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
}

.empty-state-large h3 {
  color: var(--primary-blue);
  margin-bottom: var(--spacing-sm);
}

.empty-state-large p {
  color: var(--text-secondary);
}

/* =====================================================
   Member View Layout
   ===================================================== */

.member-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--spacing-lg);
}

.main-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.content-section {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-lg);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid var(--bg-light);
}

.section-header h2 {
  margin: 0;
  color: var(--primary-blue);
  font-size: 1.25rem;
}

/* =====================================================
   Trivia Styling
   ===================================================== */

.trivia-timer {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--primary-blue);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  min-width: 80px;
}

.timer-value {
  font-size: 1.5rem;
  font-weight: bold;
  line-height: 1;
}

.timer-label {
  font-size: 0.625rem;
  text-transform: uppercase;
  opacity: 0.8;
}

.trivia-timer.warning {
  background: var(--role-host);
  color: #212529;
}

.trivia-timer.danger {
  background: var(--role-admin);
  animation: timer-pulse 0.5s ease-in-out infinite;
}

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

.question-number {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-sm);
}

.question-text {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.4;
}

.answer-options {
  display: grid;
  gap: var(--spacing-md);
}

.answer-option {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-light);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s;
  min-height: 50px;
}

.answer-option:hover:not(.selected):not(.disabled) {
  border-color: var(--accent-cyan);
  background: rgba(0, 188, 212, 0.05);
}

.answer-option.selected {
  border-color: var(--accent-cyan);
  background: rgba(0, 188, 212, 0.1);
}

.answer-option.correct {
  border-color: var(--role-member);
  background: rgba(40, 167, 69, 0.1);
}

.answer-option.incorrect {
  border-color: var(--role-admin);
  background: rgba(220, 53, 69, 0.1);
}

.answer-option.disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

.option-letter {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-blue);
  color: white;
  border-radius: 50%;
  font-weight: bold;
  flex-shrink: 0;
}

.answer-option.correct .option-letter {
  background: var(--role-member);
}

.answer-option.incorrect .option-letter {
  background: var(--role-admin);
}

.answer-feedback {
  margin-top: var(--spacing-md);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  text-align: center;
  font-weight: 500;
}

.answer-feedback.correct {
  background: rgba(40, 167, 69, 0.1);
  color: var(--role-member);
}

.answer-feedback.incorrect {
  background: rgba(220, 53, 69, 0.1);
  color: var(--role-admin);
}

.waiting-state {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-secondary);
}

.trivia-ended {
  text-align: center;
  padding: var(--spacing-xl);
}

.trivia-ended h3 {
  color: var(--accent-gold);
  margin-bottom: var(--spacing-sm);
}

/* =====================================================
   Leaderboard
   ===================================================== */

.leaderboard-panel {
  background: var(--bg-light);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.leaderboard-panel h3 {
  margin: 0 0 var(--spacing-md) 0;
  font-size: 1rem;
  color: var(--primary-blue);
}

.leaderboard-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.leaderboard-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-white);
  border-radius: var(--radius-md);
}

.leaderboard-rank {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-weight: bold;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.leaderboard-rank.gold {
  background: linear-gradient(135deg, #ffd700 0%, #ffb300 100%);
  color: #5d4e00;
}

.leaderboard-rank.silver {
  background: linear-gradient(135deg, #e0e0e0 0%, #bdbdbd 100%);
  color: #424242;
}

.leaderboard-rank.bronze {
  background: linear-gradient(135deg, #cd7f32 0%, #b87333 100%);
  color: white;
}

.leaderboard-rank.default {
  background: var(--bg-light);
  color: var(--text-secondary);
}

.leaderboard-name {
  flex: 1;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard-score {
  font-weight: bold;
  color: var(--primary-blue);
}

/* =====================================================
   Presentation/Slide Styling
   ===================================================== */

.slide-container {
  background: var(--bg-light);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.slide-display {
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
}

.slide-display iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.slide-display .empty-state {
  color: #999;
}

.slide-navigation {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.slide-preview {
  aspect-ratio: 16 / 9;
  background: var(--bg-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.slide-preview iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* =====================================================
   Poll Styling
   ===================================================== */

.poll-question {
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.poll-options {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.poll-option {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-light);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s;
  min-height: 50px;
}

.poll-option:hover:not(.voted):not(.disabled) {
  border-color: var(--accent-cyan);
}

.poll-option.selected {
  border-color: var(--role-presenter);
  background: rgba(0, 123, 255, 0.1);
}

.poll-option.voted {
  cursor: default;
}

.poll-results {
  margin-top: var(--spacing-md);
}

.poll-result-item {
  margin-bottom: var(--spacing-md);
}

.poll-result-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-xs);
  font-size: 0.875rem;
}

.poll-result-bar {
  height: 24px;
  background: var(--bg-light);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.poll-result-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-cyan) 0%, var(--light-cyan) 100%);
  border-radius: var(--radius-sm);
  transition: width 0.5s ease-out;
  display: flex;
  align-items: center;
  padding-left: var(--spacing-sm);
  color: white;
  font-size: 0.75rem;
  font-weight: bold;
}

.poll-result-fill.winner {
  background: linear-gradient(90deg, var(--role-member) 0%, #20c997 100%);
}

/* =====================================================
   Q&A Panel
   ===================================================== */

.qa-panel {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  max-height: 600px;
}

.qa-panel h3 {
  margin: 0 0 var(--spacing-md) 0;
  color: var(--primary-blue);
  font-size: 1rem;
}

.qa-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.qa-item {
  padding: var(--spacing-md);
  background: var(--bg-light);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--accent-cyan);
}

.qa-item.answered {
  border-left-color: var(--role-member);
  opacity: 0.7;
}

.qa-item-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-xs);
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.qa-item-text {
  font-size: 0.875rem;
  color: var(--text-primary);
}

.qa-input-area {
  display: flex;
  gap: var(--spacing-sm);
}

.qa-input-area input {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
}

.qa-input-area button {
  padding: var(--spacing-sm) var(--spacing-md);
}

/* =====================================================
   Host/Presenter/Admin Layouts
   ===================================================== */

.host-layout,
.presenter-layout,
.admin-layout {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* Tab Navigation */
.view-tabs {
  display: flex;
  gap: var(--spacing-sm);
  background: var(--bg-white);
  padding: var(--spacing-sm);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  flex-wrap: wrap;
}

.tab-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.tab-btn:hover {
  background: var(--bg-light);
  color: var(--text-primary);
}

.tab-btn.active {
  background: var(--primary-blue);
  color: white;
}

.tab-content {
  display: none;
}

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

/* Panels Grid */
.host-panels,
.presenter-panels,
.admin-panels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.host-panel,
.presenter-panel,
.admin-panel {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-lg);
}

.host-panel.full-width,
.presenter-panel.full-width,
.admin-panel.full-width {
  grid-column: 1 / -1;
}

.host-panel h3,
.presenter-panel h3,
.admin-panel h3 {
  margin: 0 0 var(--spacing-md) 0;
  color: var(--primary-blue);
  font-size: 1rem;
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--bg-light);
}

/* Trivia Controls */
.trivia-status,
.question-queue {
  margin-bottom: var(--spacing-md);
  font-size: 0.875rem;
}

.trivia-control-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

/* Question List */
.question-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-height: 400px;
  overflow-y: auto;
}

.question-list-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-light);
  border-radius: var(--radius-md);
}

.question-list-item .q-number {
  background: var(--primary-blue);
  color: white;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: bold;
  flex-shrink: 0;
}

.question-list-item .q-content {
  flex: 1;
}

.question-list-item .q-text {
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
}

.question-list-item .q-answer {
  font-size: 0.75rem;
  color: var(--role-member);
}

/* Q&A Management */
.qa-filters {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.filter-btn {
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--bg-light);
  border: none;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  cursor: pointer;
}

.filter-btn.active {
  background: var(--primary-blue);
  color: white;
}

.qa-management-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-height: 500px;
  overflow-y: auto;
}

.qa-management-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-light);
  border-radius: var(--radius-md);
}

.qa-management-item .qa-content {
  flex: 1;
}

.qa-management-item .qa-actions {
  display: flex;
  gap: var(--spacing-xs);
}

.qa-management-item .btn-mark-answered {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.75rem;
  background: var(--role-member);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

/* =====================================================
   Toast Notification
   ===================================================== */

.toast {
  position: fixed;
  bottom: var(--spacing-lg);
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-primary);
  color: white;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  animation: toast-in 0.3s ease-out;
}

.toast.error {
  background: var(--role-admin);
}

.toast.success {
  background: var(--role-member);
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

/* =====================================================
   Mobile Responsive
   ===================================================== */

@media (max-width: 768px) {
  .app-header {
    flex-direction: column;
    text-align: center;
  }

  .app-header-left,
  .app-header-right {
    width: 100%;
    justify-content: center;
  }

  .member-layout {
    grid-template-columns: 1fr;
  }

  .qa-panel {
    max-height: 400px;
  }

  .view-tabs {
    justify-content: center;
  }

  .host-panels,
  .presenter-panels,
  .admin-panels {
    grid-template-columns: 1fr;
  }

  .slide-navigation {
    flex-wrap: wrap;
  }

  .trivia-control-buttons {
    flex-direction: column;
  }

  .trivia-control-buttons button {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .view {
    padding: var(--spacing-md);
  }

  .login-card {
    padding: var(--spacing-lg);
  }

  .content-section {
    padding: var(--spacing-md);
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }

  .question-text {
    font-size: 1.1rem;
  }

  .answer-option {
    padding: var(--spacing-sm);
  }
}

/* =====================================================
   Connected Users List (Admin)
   ===================================================== */

.users-list {
  max-height: 300px;
  overflow-y: auto;
}

.user-list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-light);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
}

.user-list-item:last-child {
  margin-bottom: 0;
}

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

.user-name {
  font-weight: 500;
  color: var(--text-primary);
}

.user-role-tag {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  font-weight: 600;
}

.user-role-tag.admin {
  background: rgba(220, 53, 69, 0.15);
  color: var(--role-admin);
}

.user-role-tag.host {
  background: rgba(255, 193, 7, 0.15);
  color: #b38600;
}

.user-role-tag.presenter {
  background: rgba(0, 123, 255, 0.15);
  color: var(--role-presenter);
}

.user-role-tag.member {
  background: rgba(40, 167, 69, 0.15);
  color: var(--role-member);
}

.btn-remove-user {
  padding: 4px 12px;
  font-size: 0.8rem;
  background: transparent;
  color: var(--role-admin);
  border: 1px solid var(--role-admin);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-remove-user:hover {
  background: var(--role-admin);
  color: white;
}

/* =====================================================
   Member Preview (Admin/Host/Presenter View)
   ===================================================== */

.member-preview-content {
  padding: var(--spacing-md);
}

.preview-section {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.preview-header h3 {
  margin: 0;
  color: var(--primary-blue);
}

.preview-timer {
  background: var(--primary-blue);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.preview-timer .timer-value {
  font-size: 1.5rem;
  font-weight: bold;
}

.preview-timer .timer-label {
  font-size: 0.75rem;
  opacity: 0.8;
}

.preview-question-number {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-sm);
}

.preview-question-text {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.4;
}

.preview-answer-options {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.preview-answer-option {
  display: flex;
  align-items: center;
  padding: var(--spacing-md);
  background: var(--bg-light);
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  position: relative;
}

.preview-answer-option.correct-answer {
  border-color: var(--role-member);
  background: rgba(40, 167, 69, 0.1);
}

.preview-answer-option .option-letter {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-blue);
  color: white;
  border-radius: var(--radius-sm);
  font-weight: bold;
  margin-right: var(--spacing-md);
  flex-shrink: 0;
}

.preview-answer-option.correct-answer .option-letter {
  background: var(--role-member);
}

.preview-answer-option .option-text {
  flex: 1;
}

.preview-answer-option .correct-badge {
  color: var(--role-member);
  font-weight: bold;
  margin-left: var(--spacing-sm);
}

/* Poll Preview */
.preview-poll-question {
  font-size: 1.2rem;
  font-weight: 500;
  margin-bottom: var(--spacing-lg);
}

.preview-poll-options {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.preview-poll-option {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.preview-poll-option > span:first-child {
  min-width: 120px;
}

.preview-poll-bar {
  flex: 1;
  height: 24px;
  background: var(--bg-light);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.preview-poll-fill {
  height: 100%;
  background: var(--accent-cyan);
  transition: width 0.3s ease;
}

.preview-poll-option > span:last-child {
  min-width: 80px;
  text-align: right;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.preview-poll-total {
  margin-top: var(--spacing-md);
  text-align: center;
  color: var(--text-secondary);
}

/* Presentation Preview */
.preview-slide-info {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.preview-slide-frame {
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #000;
}

.preview-slide-frame iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* Online Status Indicators */
.online-indicator {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-secondary);
  margin-right: var(--spacing-xs);
}

.online-indicator.active {
  background: var(--role-member);
}

.leaderboard-item.offline {
  opacity: 0.5;
}

.leaderboard-item.offline .leaderboard-name {
  color: var(--text-secondary);
}

.leaderboard-score .role-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  background: var(--bg-light);
  color: var(--text-secondary);
}

.leaderboard-item.clickable {
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.1s ease;
}

.leaderboard-item.clickable:hover {
  background: rgba(30, 58, 95, 0.08);
  transform: translateX(2px);
}

.leaderboard-item.clickable:active {
  transform: translateX(0);
}

/* User Action Menu */
.user-action-menu {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  overflow: hidden;
  animation: menuFadeIn 0.15s ease;
}

@keyframes menuFadeIn {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.user-action-header {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-light);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.9rem;
}

.user-action-btn {
  display: block;
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background-color 0.15s ease;
}

.user-action-btn:hover {
  background: var(--bg-light);
}

.user-action-btn.remove {
  color: var(--role-admin);
}

.user-action-btn.remove:hover {
  background: rgba(220, 53, 69, 0.1);
}

.user-action-btn.cancel {
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
}

/* =====================================================
   Access Codes Management (Admin)
   ===================================================== */

.access-codes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.code-input-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.code-input-group label {
  font-weight: 500;
  color: var(--text-primary);
  font-size: 0.9rem;
}

.code-input-group input {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: monospace;
  letter-spacing: 1px;
}

.code-input-group input:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(0, 188, 212, 0.1);
}

.code-input-group .warning-text {
  color: var(--role-admin);
  font-size: 0.75rem;
  margin-top: var(--spacing-xs);
}

.access-codes-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.access-codes-buttons button {
  flex: 1;
  min-width: 150px;
}