:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --secondary: #8B5CF6;
  --danger: #dc2626;
  --success: #16a34a;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-900: #111827;
}

/* Dynamic theme colors (will be set via JS) */
body[data-theme-primary] {
  --primary: var(--theme-primary);
  --primary-dark: var(--theme-primary-dark);
}

body[data-theme-secondary] {
  --secondary: var(--theme-secondary);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary, #764ba2) 100%);
  min-height: 100vh;
  color: var(--gray-900);
}

/* Banner background */
body.has-banner {
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}

body.has-banner::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(0,0,0,0.5) 0%, rgba(0,0,0,0.3) 100%);
  z-index: -1;
}

/* Conference logo */
.conference-logo {
  max-width: 200px;
  max-height: 100px;
  margin: 0 auto 1.5rem;
  display: block;
  border-radius: 8px;
}

/* Info sections */
.info-section {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.info-section h3 {
  color: var(--primary);
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

.info-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 1rem;
}

.info-title-icon {
  display: inline-flex;
  width: 1.5rem;
  height: 1.5rem;
  color: var(--primary);
}

.info-title-icon svg {
  width: 100%;
  height: 100%;
}

.info-section p,
.info-section ul {
  color: var(--gray-700);
  line-height: 1.6;
}

.info-section ul {
  list-style-position: inside;
  padding-left: 0;
}

/* Earpiece Notice Banner */
.earpiece-notice {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: #fef3c7;
  border-bottom: 3px solid #f59e0b;
  padding: 12px 20px;
  text-align: center;
  font-weight: 600;
  color: #78350f;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header */
.header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--gray-600);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gray-300);
}

.status-dot.online {
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
  animation: pulse 2s infinite;
}

.status-dot.offline {
  background: var(--danger);
}

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

/* Main Content */
.main {
  flex: 1;
  padding: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.screen {
  display: none;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  animation: fadeIn 0.3s ease-in;
}

.screen.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Welcome Screen */
.welcome-content {
  text-align: center;
}

.conference-name {
  font-size: 2rem;
  font-weight: 700;
  color: white;
  margin-bottom: 0.5rem;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.conference-info {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 2rem;
  font-size: 1.1rem;
}

/* Card */
.card {
  background: white;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  margin-bottom: 1.5rem;
}

.card h2, .card h3 {
  margin-bottom: 0.75rem;
  color: var(--gray-900);
}

.card p {
  color: var(--gray-600);
  margin-bottom: 1.5rem;
}

/* Form */
.form {
  text-align: left;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--gray-700);
}

.form-group input {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid var(--gray-200);
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.2s;
}

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

/* Buttons */
.btn {
  width: 100%;
  padding: 0.875rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

/* LOCAL-ENTRY-SIMPLIFY-1 */
.field-optional {
  font-weight: 400;
  color: var(--gray-600);
}

.form-warning {
  margin: -0.5rem 0 1.5rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  background: #fef2f2;
  color: var(--danger);
  font-size: 0.9rem;
  line-height: 1.4;
}

.entry-secondary-link {
  display: block;
  text-align: center;
  margin-top: 1rem;
  color: var(--gray-600);
  font-size: 0.9rem;
  text-decoration: underline;
}

/* LOCAL-ENTRY-UX-CONVERGENCE-1: the real portal shell (#stream-screen) sits behind this overlay,
   visible and public-info-populated but not yet interactive or media-connected -- see the overlay's
   own comment in index.html. This is a bottom sheet over that shell, not a separate page. */
.identity-sheet-overlay {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.identity-sheet-overlay[hidden] {
  display: none;
}

.identity-scrim {
  position: absolute;
  inset: 0;
  background: rgba(17, 24, 39, 0.45);
  backdrop-filter: blur(2px);
}

.identity-sheet {
  position: relative;
  width: 100%;
  max-width: 520px;
  max-height: 88vh;
  overflow-y: auto;
  background: #fff;
  border-radius: 20px 20px 0 0;
  padding: 14px 24px calc(24px + env(safe-area-inset-bottom));
  box-shadow: 0 -12px 40px rgba(17, 24, 39, 0.25);
  animation: identity-sheet-up 0.22s ease-out;
}

@media (min-width: 560px) {
  .identity-sheet-overlay {
    align-items: center;
  }
  .identity-sheet {
    border-radius: 20px;
    margin-bottom: 5vh;
  }
}

@keyframes identity-sheet-up {
  from { transform: translateY(24px); opacity: 0.6; }
  to { transform: translateY(0); opacity: 1; }
}

.identity-sheet-grabber {
  width: 40px;
  height: 4px;
  border-radius: 999px;
  background: var(--gray-200);
  margin: 0 auto 14px;
}

.identity-sheet h1 {
  font-size: 1.3rem;
  font-weight: 700;
  text-align: center;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
  color: var(--gray-900);
}

.identity-sheet-context {
  text-align: center;
  color: var(--gray-600);
  font-size: 0.92rem;
  margin: 0 0 1.25rem;
}

.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--gray-200);
}

.btn-danger {
  background: var(--danger);
  color: white;
  width: auto;
  padding: 0.625rem 1.25rem;
}

.btn-danger:hover {
  background: #b91c1c;
}

.btn-link {
  background: transparent;
  color: white;
  text-decoration: underline;
}

.btn-link:hover {
  opacity: 0.8;
}

/* Language Selection */
.screen-content {
  text-align: center;
}

.screen-content h2 {
  color: white;
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.subtitle {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 2rem;
}

.language-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.language-btn {
  background: white;
  color: var(--gray-900);
  padding: 1rem;
  border: 2px solid transparent;
  border-radius: 12px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  min-height: 96px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.35rem;
}

.language-btn:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.language-btn small {
  color: var(--success);
  font-size: 0.8rem;
  font-weight: 700;
}

.language-btn strong {
  color: var(--primary);
  font-size: 0.9rem;
}

.language-btn.coming-soon,
.language-pill.coming-soon {
  cursor: not-allowed;
  opacity: 0.55;
}

.language-btn.coming-soon:hover {
  border-color: transparent;
  transform: none;
  box-shadow: none;
}

.language-btn.coming-soon small {
  color: var(--gray-500, #6b7280);
}

.language-pill.coming-soon:hover {
  border-color: var(--gray-200);
  color: var(--gray-900);
}

.speakers-list {
  display: grid;
  gap: 0.9rem;
}

.speaker-card {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 0.9rem;
  align-items: start;
  padding: 0.85rem;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  background: var(--gray-50);
}

.speaker-card img {
  width: 64px;
  height: 64px;
  object-fit: cover;
  border-radius: 8px;
  background: var(--gray-200);
}

.speaker-card h4 {
  margin: 0 0 0.25rem;
  color: var(--gray-900);
}

.speaker-card p {
  margin: 0.25rem 0 0;
  color: var(--gray-700);
}

.speaker-meta {
  font-weight: 600;
}

/* Stream Screen */
.stream-container {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.stream-channel {
  font-weight: 600;
  color: var(--gray-700);
  font-size: 1.05rem;
}

.stream-hub {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.stream-announcement {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1.2rem;
  border-radius: 12px;
  background: #1f2937;
  color: #fff;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 0;
  box-shadow: 0 10px 30px -20px rgba(0,0,0,0.5);
  z-index: 20;
}

.stream-announcement.info    { background: #2563eb; color: #fff; }
.stream-announcement.warning { background: #f59e0b; color: #111827; }
.stream-announcement.urgent  { background: #dc2626; color: #fff; }

/* Ensure fixed banner doesn't overlap content */
body.banner-active .header,
body.banner-active .main { margin-top: 56px; }

.stream-announcement-content {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
}

.stream-announcement-icon {
  width: 1.3rem;
  height: 1.3rem;
  border-radius: 999px;
  background: currentColor;
  mask: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="white" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"%3E%3Cpath d="M12 9v4"/%3E%3Cpath d="M12 17h.01"/%3E%3Cpath d="M21 12a9 9 0 1 1-18 0 9 9 0 0 1 18 0z"/%3E%3C/svg%3E') center/contain no-repeat;
  -webkit-mask: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="white" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"%3E%3Cpath d="M12 9v4"/%3E%3Cpath d="M12 17h.01"/%3E%3Cpath d="M21 12a9 9 0 1 1-18 0 9 9 0 0 1 18 0z"/%3E%3C/svg%3E') center/contain no-repeat;
}

.stream-announcement-close {
  border: none;
  background: transparent;
  color: inherit;
  font-size: 1.4rem;
  font-weight: 700;
  cursor: pointer;
  line-height: 1;
  padding: 0.25rem 0.5rem;
}

.stream-top-bar {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.stream-top-meta {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.stream-event-name {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
}

.stream-now-playing {
  margin: 0;
  font-weight: 600;
  color: var(--primary);
}

.stream-session-status {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  color: var(--gray-600);
  font-size: 0.95rem;
}

.stream-session-status p {
  margin: 0;
}

.session-progress {
  position: relative;
  height: 6px;
  border-radius: 999px;
  background: var(--gray-200);
  overflow: hidden;
}

.session-progress-bar {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  background: linear-gradient(90deg, var(--primary), var(--secondary, #7c3aed));
  width: 0%;
  transition: width 0.3s ease;
}

.language-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  justify-content: center;
}

.language-pill {
  border: 1px solid var(--gray-200);
  background: var(--gray-50);
  color: var(--gray-900);
  border-radius: 999px;
  padding: 0.5rem 1rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.language-pill:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.language-pill.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 0 0 1px rgba(59, 130, 246, 0.2);
}

.stream-footer {
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
  background: rgba(255, 255, 255, 0.95);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 0.9rem 1.2rem;
  justify-content: space-between;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  min-width: 180px;
}

.status-chip.is-offline {
  border-color: rgba(220, 38, 38, 0.35);
  background: rgba(254, 226, 226, 0.45);
}

.status-chip.is-offline #footer-status-value {
  color: var(--red-500);
}

.status-chip-icon {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--primary);
}

.status-chip-icon svg {
  width: 100%;
  height: 100%;
}

.status-chip-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.status-chip-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--gray-500);
}

#footer-language-value,
#footer-status-value {
  font-weight: 600;
  color: var(--gray-800);
}

.stream-hub-layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 1.5rem;
  align-items: start;
}

.stream-hub-layout.with-agenda {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  grid-template-rows: auto;
  gap: 1.5rem;
  align-items: flex-start;
}

@media (max-width: 900px) {
  .stream-hub-layout.with-agenda {
    grid-template-columns: 1fr;
  }
}

.agenda-panel {
  background: white;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  padding: 1.25rem;
  display: none;
}

.agenda-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.agenda-header h3 {
  margin: 0;
  font-size: 1.1rem;
}

.agenda-now {
  font-size: 0.9rem;
  color: var(--gray-600);
}

.agenda-days {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.agenda-day {
  border: 1px solid var(--gray-200);
  background: var(--gray-50);
  color: var(--gray-900);
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.agenda-day:hover {
  border-color: var(--primary);
}

.agenda-day.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.agenda-session-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.agenda-session {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 0.75rem;
  padding: 0.75rem;
  border-radius: 10px;
  border: 1px solid var(--gray-200);
  background: var(--gray-50);
}

.agenda-session-break {
  background: #fff8e1;
  border-color: #ffe082;
}

.agenda-session-current {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px rgba(59, 130, 246, 0.15);
}

.agenda-session-next {
  border-style: dashed;
}

.agenda-time {
  font-weight: 600;
  color: var(--gray-700);
}

.agenda-details {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.agenda-title {
  font-weight: 700;
  color: var(--gray-900);
}

.agenda-meta {
  font-size: 0.85rem;
  color: var(--gray-600);
}

.agenda-empty {
  margin: 0;
  padding: 0.75rem;
  border-radius: 8px;
  background: var(--gray-100);
  color: var(--gray-600);
}

.stream-header {
  background: var(--gray-900);
  color: white;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.stream-header h3 {
  margin: 0;
}

.stream-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.75rem;
}

.stream-actions .btn-secondary {
  width: auto;
  padding: 0.625rem 1.25rem;
}

.stream-player {
  background: black;
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.native-player {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}

.stream-player.audio-focused {
  aspect-ratio: auto;
  min-height: 160px;
  background: #111827;
}

.native-player.audio-only {
  width: 1px;
  height: 1px;
  opacity: 0;
  position: absolute;
}

.stream-player.audio-focused::before {
  content: 'Audio-focused mode';
  color: #fff;
  font-weight: 700;
  letter-spacing: 0;
}

.player-message {
  color: #fff;
  padding: 1rem;
  text-align: center;
}

.player-console {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem;
  border-top: 1px solid var(--gray-200);
  background: #fff;
}

.player-state {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
}

.player-state-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--gray-600);
}

#player-detail {
  color: var(--gray-600);
  font-size: 0.92rem;
}

.player-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
  gap: 0.5rem;
}

.player-button {
  min-height: 44px;
  border-radius: 8px;
  border: 1px solid var(--gray-300);
  background: var(--gray-50);
  color: var(--gray-900);
  padding: 0.5rem 0.75rem;
  font: inherit;
  font-weight: 600;
}

.mode-toggle {
  display: flex;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  overflow: hidden;
}

.mode-toggle-btn {
  min-height: 44px;
  min-width: 44px;
  border: none;
  border-right: 1px solid var(--gray-300);
  background: var(--gray-50);
  color: var(--gray-900);
  padding: 0.5rem 0.9rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.mode-toggle-btn:last-child {
  border-right: none;
}

.mode-toggle-btn.active {
  background: var(--primary);
  color: #fff;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
.language-btn:focus-visible,
.language-pill:focus-visible,
.player-button:focus-visible,
.mode-toggle-btn:focus-visible {
  outline: 3px solid #fbbf24;
  outline-offset: 3px;
}

.player-button {
  cursor: pointer;
}

.player-button:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.attendee-help-panel {
  background: rgba(255,255,255,0.95);
  border-radius: 12px;
  padding: 1.25rem;
  border: 1px solid var(--gray-200);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.attendee-help-panel h3 {
  margin: 0 0 0.85rem;
}

.help-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--gray-100);
}

.help-row span {
  color: var(--gray-600);
}

.attendee-help-panel p {
  margin: 0.85rem 0 0;
  color: var(--gray-700);
  line-height: 1.45;
}

.replay-panel {
  background: rgba(255,255,255,0.95);
  border-radius: 12px;
  padding: 1.25rem;
  border: 1px solid var(--gray-200);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  margin-top: 1.5rem;
}

.replay-panel h3 {
  margin: 0 0 0.85rem;
}

.replay-panel .replay-coming-soon {
  margin: 0;
  color: var(--gray-700);
  line-height: 1.45;
}

.stream-loading {
  text-align: center;
  color: white;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 1rem;
}

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

/* Error Screen */
.error-content {
  text-align: center;
  color: white;
}

.error-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
}

.error-content h2 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

.error-message {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 1rem;
  border-radius: 8px;
  margin-bottom: 2rem;
  font-size: 1.1rem;
}

/* Footer */
.footer {
  background: rgba(255, 255, 255, 0.95);
  padding: 1rem 2rem;
  text-align: center;
  color: var(--gray-600);
  font-size: 0.875rem;
}

/* Responsive */

/* Tablet and below (1024px) */
@media (max-width: 1024px) {
  .stream-hub-layout {
    grid-template-columns: 1fr;
  }

  .stream-hub-layout.with-agenda {
    grid-template-columns: 1fr;
  }

  .agenda-panel {
    max-height: none;
  }
}

/* Tablet (768px - 1024px) */
@media (max-width: 768px) {
  .header, .footer {
    padding: 1rem;
  }

  .main {
    padding: 1rem;
  }

  .conference-name {
    font-size: 1.5rem;
  }

  .card {
    padding: 1.5rem;
  }

  .language-grid {
    grid-template-columns: 1fr;
  }

  .stream-top-bar {
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
  }

  .language-pills {
    justify-content: flex-start;
  }
  
  /* Collapsible agenda on tablet */
  .agenda-panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0;
  }
  
  .agenda-panel.expanded {
    max-height: 500px;
    overflow-y: auto;
    padding: 1.25rem;
  }
  
  .agenda-header {
    cursor: pointer;
    background: var(--gray-50);
    padding: 1rem;
    border-radius: 12px;
    margin: 0;
  }
  
  .agenda-panel:not(.expanded) .agenda-header {
    background: white;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  }
  
  .agenda-header::after {
    content: '▼';
    float: right;
    transition: transform 0.3s;
    color: var(--primary);
  }
  
  .agenda-panel.expanded .agenda-header::after {
    transform: rotate(180deg);
  }
  
  .stream-footer {
    flex-direction: column;
    gap: 0.75rem;
  }

  .player-console {
    grid-template-columns: 1fr;
  }

  .player-controls {
    justify-content: stretch;
  }

  .player-button {
    flex: 1 1 calc(50% - 0.5rem);
  }

  .mode-toggle {
    flex: 1 1 100%;
  }

  .mode-toggle-btn {
    flex: 1 1 50%;
  }
  
  .status-chip {
    width: 100%;
    justify-content: space-between;
    min-width: auto;
  }
}

/* Mobile (640px and below) */
@media (max-width: 640px) {
  .header {
    padding: 0.75rem 1rem;
  }
  
  .logo {
    font-size: 1.25rem;
  }
  
  .main {
    padding: 0.75rem;
  }
  
  .conference-name {
    font-size: 1.25rem;
  }
  
  .card {
    padding: 1.25rem;
  }
  
  .stream-top-bar {
    padding: 1rem;
    gap: 0.75rem;
  }
  
  .stream-event-name {
    font-size: 1.25rem;
  }
  
  .language-pills {
    width: 100%;
  }
  
  .language-pill {
    flex: 1 1 calc(50% - 0.25rem);
    min-width: auto;
    text-align: center;
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
  }

  .speaker-card {
    grid-template-columns: 1fr;
  }
  
  .stream-announcement {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
  }
  
  .stream-announcement-content {
    gap: 0.5rem;
  }
  
  .stream-footer {
    padding: 0.75rem 1rem;
  }
  
  .agenda-panel.expanded {
    max-height: 400px;
  }
  
  .info-section {
    padding: 1.25rem;
  }
  
  .form-group input {
    padding: 0.625rem;
  }
  
  .btn {
    padding: 0.75rem 1.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

/* Landscape mobile optimization */
@media (max-height: 500px) and (orientation: landscape) {
  .main {
    padding: 0.5rem;
  }
  
  .stream-hub {
    gap: 0.75rem;
  }
  
  .stream-top-bar {
    padding: 0.75rem 1rem;
  }
  
  .agenda-panel {
    display: none !important;
  }
  
  .stream-footer {
    padding: 0.5rem 1rem;
  }
}

.hls-helper {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: #fff;
}
.hls-helper a {
  color: var(--primary, #ffcc33);
  text-decoration: underline;
}

.stream-bottom-bar {
  position: sticky;
  bottom: 0;
  z-index: 20;
  background: rgba(7,23,47,.96);
  backdrop-filter: blur(12px);
}

.mini-player {
  display: flex;
  align-items: center;
  gap: .65rem;
  min-height: 2.75rem;
  padding: .5rem .75rem;
  border-top: 1px solid rgba(255,255,255,.18);
  color: white;
}
.mini-player[hidden] { display: none; }
.mini-player-state {
  font-weight: 700;
  font-size: .82rem;
  white-space: nowrap;
}
.mini-player-language {
  font-size: .8rem;
  opacity: .8;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.mini-player-button {
  margin-left: auto;
  min-width: 2.75rem;
  min-height: 2.75rem;
  padding: .4rem .65rem;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: .6rem;
  color: white;
  background: rgba(255,255,255,.08);
  font: inherit;
  font-size: .78rem;
  font-weight: 700;
  cursor: pointer;
}
.mini-player-button + .mini-player-button { margin-left: .4rem; }
.mini-player-expand {
  background: var(--primary);
  border-color: var(--primary);
}

.attendee-portal-nav {
  display: grid;
  grid-template-columns: repeat(7, minmax(5.5rem, 1fr));
  gap: .35rem;
  padding: .65rem;
  overflow-x: auto;
  border-top: 1px solid rgba(255,255,255,.18);
}
.attendee-portal-nav button {
  min-height: 2.75rem;
  padding: .5rem .65rem;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: .75rem;
  color: white;
  background: rgba(255,255,255,.08);
  font: inherit;
  font-size: .8rem;
  font-weight: 700;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .2rem;
}
.attendee-portal-nav button:disabled { opacity: .52; }
.attendee-portal-nav button.active {
  background: var(--primary);
  border-color: var(--primary);
}
.attendee-portal-nav .nav-icon {
  width: 1.25rem;
  height: 1.25rem;
}
.attendee-portal-nav .nav-icon svg {
  width: 100%;
  height: 100%;
}
.attendee-portal-nav .nav-label {
  font-size: .78rem;
}

.nav-more-panel {
  position: absolute;
  right: .65rem;
  bottom: calc(100% + .35rem);
  z-index: 25;
  display: flex;
  flex-direction: column;
  min-width: 10rem;
  padding: .4rem;
  border-radius: .75rem;
  border: 1px solid rgba(255,255,255,.2);
  background: rgba(7,23,47,.98);
  box-shadow: 0 8px 24px rgba(0,0,0,.35);
}
.nav-more-panel[hidden] { display: none; }
.nav-more-panel button {
  min-height: 2.75rem;
  padding: .5rem .75rem;
  border: none;
  border-radius: .5rem;
  color: white;
  background: transparent;
  font: inherit;
  font-size: .88rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}
.nav-more-panel button:hover,
.nav-more-panel button:focus-visible {
  background: rgba(255,255,255,.12);
}

@media (max-width: 640px) {
  .stream-bottom-bar { position: fixed; right: 0; left: 0; }
  .attendee-portal-nav { grid-template-columns: repeat(5, minmax(4.6rem, 1fr)); }
  .attendee-portal-nav button[data-portal-target="announcement-banner"],
  .attendee-portal-nav button[data-portal-target="portal-replay"] {
    display: none;
  }
  #stream-screen { padding-bottom: 5.25rem; }
}