:root {
  --bg: #050505;
  --panel: rgba(18, 10, 24, 0.9);
  --panel-border: rgba(212, 175, 55, 0.18);
  --text: #f4ecff;
  --muted: #cbbfd8;
  --gold: #d4af37;
  --primary: #8b008b;
  --primary-strong: #b51db5;
  --danger: #ff7a7a;
  --danger-strong: #ff5d5d;
  --success: #8be6a2;
  --success-strong: #2c8e49;
  --warning: #f4d58d;
  --radius: 24px;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.4);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(139, 0, 139, 0.28), transparent 32%),
    radial-gradient(circle at top right, rgba(212, 175, 55, 0.14), transparent 24%),
    linear-gradient(160deg, #030303 0%, #0a0610 45%, #120714 72%, #040404 100%);
}

body[data-role="host"],
body[data-role="student"] {
  background: #050508;
  overflow-x: hidden;
  overflow-y: auto;
}

.page {
  width: min(1480px, calc(100% - 20px));
  margin: 0 auto;
  padding: 16px 0 18px;
}

.hero,
.panel {
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.01)),
    var(--panel);
  box-shadow: var(--shadow);
}

.hero {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 24px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 700;
}

.eyebrow.small {
  font-size: 0.74rem;
  margin-bottom: 8px;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 12px;
  font-size: clamp(2rem, 4vw, 3.4rem);
}

h2 {
  margin-bottom: 8px;
}

.lead {
  max-width: 720px;
  color: var(--muted);
  line-height: 1.7;
}

.back-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  color: var(--text);
  text-decoration: none;
  border: 1px solid rgba(212, 175, 55, 0.32);
  white-space: nowrap;
}

.hero-links,
.support-links,
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-links {
  justify-content: flex-end;
}

.support-links {
  margin-top: 14px;
}

.support-links.compact {
  margin-top: 10px;
}

.footer-links {
  justify-content: center;
  margin-top: 18px;
}

.support-links .back-link,
.footer-links .back-link,
.hero-links .back-link {
  min-height: 42px;
  padding: 0 16px;
  font-size: 0.92rem;
}

.tutorial-page {
  width: min(1200px, calc(100% - 20px));
}

.tutorial-hero {
  display: grid;
  gap: 20px;
}

.tutorial-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

.tutorial-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 18px;
  margin-top: 18px;
}

.tutorial-stack {
  display: grid;
  gap: 18px;
}

.tutorial-section {
  padding: 22px;
}

.tutorial-section h2,
.tutorial-section h3 {
  margin-top: 0;
}

.tutorial-steps {
  display: grid;
  gap: 14px;
}

.tutorial-step {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  background: rgba(255, 255, 255, 0.025);
}

.tutorial-step strong {
  color: var(--text);
}

.tutorial-list {
  margin: 14px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.7;
}

.tutorial-list li + li {
  margin-top: 8px;
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item {
  padding: 16px 18px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  background: rgba(255, 255, 255, 0.025);
}

.faq-item strong {
  display: block;
  margin-bottom: 6px;
}

.promo-card {
  padding: 22px;
  border-radius: 18px;
  border: 1px solid rgba(212, 175, 55, 0.18);
  background:
    radial-gradient(circle at top right, rgba(139, 0, 139, 0.18), transparent 34%),
    rgba(255, 255, 255, 0.025);
}

.tutorial-footer {
  margin-top: 18px;
  text-align: center;
}

.form-panel,
.help-panel,
.roster-panel,
.host-actions-panel {
  margin-top: 0;
  padding: 24px;
}

body[data-role="host"] .page {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 100vh;
}

body[data-role="student"] .page {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 100vh;
}

body[data-role="host"] .hero,
body[data-role="student"] .hero {
  padding: 12px 14px;
  border-radius: 14px;
  border-color: rgba(255, 255, 255, 0.05);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0)),
    rgba(10, 10, 14, 0.9);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.18);
  flex: 0 0 auto;
}

body[data-role="host"] .hero h1,
body[data-role="student"] .hero h1 {
  font-size: clamp(1.35rem, 2vw, 2rem);
  margin-bottom: 8px;
}

body[data-role="host"] .hero .lead,
body[data-role="student"] .hero .lead {
  max-width: none;
  font-size: 0.95rem;
  line-height: 1.5;
}

body[data-role="host"] .meeting-shell,
body[data-role="student"] .meeting-shell {
  order: 2;
  flex: 1;
  min-height: 0;
}

body[data-role="host"] .form-panel,
body[data-role="student"] .form-panel {
  order: 3;
  margin-top: 0;
  padding: 10px 14px;
  border-radius: 14px;
  border-color: rgba(255, 255, 255, 0.05);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.015), rgba(255, 255, 255, 0)),
    rgba(10, 10, 14, 0.96);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.2);
  flex: 0 0 auto;
}

.meeting-dock {
  scrollbar-width: thin;
}

.meeting-control-actions {
  position: static;
  padding-top: 0;
  padding-bottom: 0;
  margin-bottom: 10px;
  background: transparent;
}

.admin-dock,
.student-dock {
  display: grid;
  gap: 14px;
}

.admin-dock-grid,
.admin-command-grid {
  display: grid;
  gap: 14px;
}

.admin-dock-grid {
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.2fr);
}

.admin-command-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.admin-control-section {
  display: grid;
  gap: 10px;
  padding: 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.admin-control-section h3 {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text);
}

.admin-control-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.admin-control-group button,
.admin-control-group .back-link {
  min-width: 220px;
}

.recording-status {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 93, 93, 0.12);
  border: 1px solid rgba(255, 93, 93, 0.26);
  color: #ffd7d7;
  font-size: 0.9rem;
}

.recording-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #ff4d4d;
  box-shadow: 0 0 0 0 rgba(255, 77, 77, 0.55);
  animation: recording-pulse 1.4s infinite ease-out;
}

@keyframes recording-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(255, 77, 77, 0.55);
  }
  70% {
    box-shadow: 0 0 0 9px rgba(255, 77, 77, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(255, 77, 77, 0);
  }
}

.student-entry-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.student-friendly-status {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.student-control-actions {
  margin-bottom: 0;
}

.student-view-mode {
  display: grid;
  gap: 8px;
}

.student-view-mode .field {
  max-width: 340px;
}

.participant-hero .lead:empty {
  display: none;
}

.student-viewmode-panel {
  order: 2;
  margin-top: 0;
}

.host-stage-grid {
  display: grid;
  grid-template-columns: minmax(0, 2.2fr) minmax(320px, 0.95fr);
  gap: 22px;
  align-items: start;
  margin-top: 22px;
}

.host-video-column {
  min-width: 0;
}

.compact-roster-panel {
  margin-top: 0;
  position: sticky;
  top: 18px;
}

.field-grid,
.status-grid,
.video-grid {
  display: grid;
  gap: 18px;
}

.field-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.status-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

body[data-role="host"] .status-grid,
body[data-role="student"] .status-grid {
  gap: 10px;
}

.video-grid {
  margin-top: 22px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.host-stage-grid .video-grid {
  margin-top: 0;
}

.single-stage-panel {
  margin-top: 22px;
  padding: 20px;
}

.host-call-stage-panel {
  margin-top: 0;
}

.call-stage {
  overflow: hidden;
}

.call-stage-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.audio-activate-button {
  min-height: 40px;
  padding: 0 16px;
  font-size: 0.88rem;
}

.call-video-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  align-items: stretch;
}

.call-video-grid.waiting-grid {
  grid-template-columns: minmax(0, 1fr);
  max-width: 720px;
  margin: 0 auto;
}

.call-stage.connecting .call-video-grid,
.call-stage.active-call .call-video-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: none;
}

.video-tile {
  position: relative;
  overflow: hidden;
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(18, 18, 22, 0.9), rgba(10, 10, 14, 0.95));
  border: 1px solid rgba(255, 255, 255, 0.08);
  min-height: 260px;
}

.video-tile.spotlight-tile {
  min-height: 360px;
}

.video-tile.is-hidden {
  display: none;
}

.video-overlay {
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 14px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  z-index: 2;
}

.video-label {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(6, 6, 10, 0.72);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  backdrop-filter: blur(8px);
}

.field {
  display: grid;
  gap: 8px;
}

.field span,
.status-label {
  color: var(--muted);
  font-size: 0.92rem;
}

input,
select,
textarea {
  width: 100%;
  min-height: 52px;
  padding: 0 16px;
  border: 1px solid rgba(212, 175, 55, 0.18);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  font-size: 1rem;
}

textarea {
  min-height: 132px;
  padding: 16px;
  resize: vertical;
}

input::placeholder,
textarea::placeholder {
  color: rgba(244, 236, 255, 0.45);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 18px 0 22px;
}

button {
  min-height: 52px;
  padding: 0 22px;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.98rem;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  box-shadow: 0 14px 30px rgba(139, 0, 139, 0.3);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  box-shadow: none;
}

button.secondary {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(212, 175, 55, 0.24);
  box-shadow: none;
}

button.ghost {
  color: var(--muted);
  background: transparent;
  border: 1px dashed rgba(255, 255, 255, 0.16);
  box-shadow: none;
}

button.danger {
  background: linear-gradient(135deg, var(--danger-strong), #cb3b3b);
  box-shadow: none;
}

.status-box {
  padding: 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.status-box strong {
  display: block;
  margin-top: 6px;
  line-height: 1.35;
  font-size: 0.92rem;
}

.warning,
.inline-note,
.help-note,
.muted-copy {
  color: var(--muted);
  line-height: 1.7;
}

.warning,
.inline-note,
.help-note {
  margin: 16px 0 0;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 18px;
}

.participant-list {
  display: grid;
  gap: 12px;
}

.participants-sidebar .participant-list {
  max-height: calc(100% - 48px);
  overflow: auto;
  padding-right: 4px;
}

.compact-participant-list {
  max-height: 980px;
  overflow: auto;
  padding-right: 4px;
}

.student-compact-status {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.student-optional-status {
  display: none;
}

.participant-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 10px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(255, 255, 255, 0.025);
}

.participant-row.waiting {
  border-color: rgba(244, 213, 141, 0.18);
}

.participant-row.active {
  border-color: rgba(255, 255, 255, 0.06);
}

.participant-main {
  min-width: 0;
  flex: 1;
}

.participant-name {
  font-size: 0.86rem;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.participant-status,
.empty-state {
  color: var(--muted);
  line-height: 1.35;
}

.participant-status {
  margin-top: 2px;
  font-size: 0.74rem;
}

.participant-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px;
  flex-shrink: 0;
}

.participant-action-btn {
  min-height: 28px;
  padding: 0 10px;
  font-size: 0.74rem;
  font-weight: 700;
  border-radius: 999px;
  box-shadow: none;
  min-width: auto;
}

.participant-action-btn.secondary {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(212, 175, 55, 0.18);
  color: var(--text);
}

.participant-action-btn.ghost {
  background: transparent;
  border: 1px dashed rgba(255, 255, 255, 0.18);
  color: var(--muted);
}

.participant-action-btn.danger {
  background: linear-gradient(135deg, var(--danger-strong), #cb3b3b);
}

.mute-modal {
  position: fixed;
  inset: 0;
  z-index: 80;
}

.mute-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(4, 4, 8, 0.66);
  backdrop-filter: blur(6px);
}

.mute-modal-dialog {
  position: relative;
  width: min(420px, calc(100% - 24px));
  margin: min(16vh, 120px) auto 0;
  padding: 18px;
  border-radius: 16px;
  border: 1px solid rgba(212, 175, 55, 0.2);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.01)),
    rgba(14, 12, 18, 0.98);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.38);
}

.mute-modal-dialog h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.mute-modal-text,
.mute-modal-target {
  color: var(--muted);
}

.mute-modal-text {
  margin: 0;
  line-height: 1.5;
}

.mute-modal-target {
  margin-top: 8px;
  font-size: 0.82rem;
  font-weight: 700;
}

.mute-modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
}

.chip.pending {
  background: rgba(244, 213, 141, 0.14);
  color: var(--warning);
}

.chip.active {
  background: rgba(139, 0, 139, 0.18);
  color: #fff;
}

.chip.connected {
  background: rgba(43, 126, 72, 0.2);
  color: var(--success);
}

.chip.closed {
  background: rgba(255, 255, 255, 0.08);
  color: var(--muted);
}

.video-panel {
  padding: 20px;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 14px;
}

.panel-header h2 {
  margin-bottom: 0;
}

.badge {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(139, 0, 139, 0.2);
  color: #fff;
  font-size: 0.85rem;
}

.badge.muted {
  background: rgba(255, 255, 255, 0.08);
  color: var(--muted);
}

video {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 18px;
  background: #000;
  object-fit: cover;
  border: 0;
  display: block;
  height: 100%;
  min-height: 260px;
}

.help-panel ol {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.75;
}

.error-text {
  margin: 16px 0 0;
  padding: 14px 16px;
  border-radius: 16px;
  color: #fff;
  background: rgba(255, 122, 122, 0.16);
  border: 1px solid rgba(255, 122, 122, 0.32);
}

@media (max-width: 980px) {
  .hero,
  .section-head,
  .panel-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .field-grid,
  .status-grid,
  .video-grid {
    grid-template-columns: 1fr;
  }

  .host-stage-grid {
    grid-template-columns: 1fr;
  }

  .compact-roster-panel {
    position: static;
  }

  .call-video-grid,
  .call-stage.connecting .call-video-grid,
  .call-stage.active-call .call-video-grid {
    grid-template-columns: 1fr;
  }

  .video-tile,
  .video-tile.spotlight-tile,
  video {
    min-height: 240px;
  }
}

@media (max-width: 560px) {
  .page {
    width: min(100% - 20px, 100%);
    padding-top: 20px;
  }

  .hero,
  .form-panel,
  .help-panel,
  .roster-panel,
  .host-actions-panel,
  .video-panel {
    padding: 18px;
  }

  .actions,
  .participant-actions,
  .mute-modal-actions {
    flex-direction: column;
  }

  button,
  .back-link,
  .participant-action-btn {
    width: 100%;
  }

  .call-stage-actions {
    width: 100%;
  }

  .audio-activate-button {
    width: 100%;
  }

  .video-tile,
  .video-tile.spotlight-tile,
  video {
    min-height: 210px;
  }

  .video-overlay {
    left: 10px;
    right: 10px;
    bottom: 10px;
    flex-direction: column;
    align-items: flex-start;
  }
}

.meeting-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 8px;
  align-items: stretch;
  margin-top: 0;
  min-height: 0;
}

.single-column-shell {
  grid-template-columns: 1fr;
}

.meeting-stage,
.meeting-sidebar {
  padding: 8px;
}

.meeting-stage {
  min-height: 0;
  min-height: clamp(420px, 56vh, 760px);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.015), rgba(255, 255, 255, 0)),
    #050508;
  border-color: rgba(255, 255, 255, 0.04);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.18);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: 14px;
}

.meeting-sidebar {
  position: sticky;
  top: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0)),
    rgba(14, 12, 18, 0.9);
  border-color: rgba(255, 255, 255, 0.05);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.16);
  border-radius: 14px;
  align-self: start;
}

.participant-section + .participant-section {
  margin-top: 18px;
}

.participant-section h3 {
  margin: 0 0 12px;
  font-size: 0.98rem;
  color: var(--muted);
}

.room-video-grid {
  flex: 1;
  width: 100%;
  min-height: 100%;
  min-height: 0;
  display: grid;
  gap: 4px;
  margin-top: 0;
  align-items: stretch;
  justify-items: stretch;
  align-content: start;
  grid-auto-rows: minmax(0, 1fr);
  overflow: hidden;
  padding: 0;
  background: #050508;
}

.room-video-grid.waiting-grid {
  grid-template-columns: minmax(0, 720px);
  justify-content: center;
  max-width: none;
  margin: 0 auto;
}

.room-video-grid.count-1 {
  grid-template-columns: 1fr;
}

.room-video-grid.count-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.room-video-grid.count-3,
.room-video-grid.count-4 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.room-video-grid.count-5,
.room-video-grid.count-6,
.room-video-grid.count-7,
.room-video-grid.count-8,
.room-video-grid.count-9 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.room-video-grid.count-10,
.room-video-grid.count-11,
.room-video-grid.count-12,
.room-video-grid.count-13,
.room-video-grid.count-14,
.room-video-grid.count-15,
.room-video-grid.count-16 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.room-video-grid.count-17,
.room-video-grid.count-18,
.room-video-grid.count-19,
.room-video-grid.count-20 {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.participant-tile,
.stage-source {
  position: relative;
  overflow: hidden;
  border-radius: 6px;
  aspect-ratio: 16 / 9;
  min-height: 132px;
  background: #000;
  border: none;
  box-shadow: none;
  padding: 0;
}

.participant-tile::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0) 54%, rgba(0, 0, 0, 0.32) 100%);
  pointer-events: none;
}

.participant-tile.self-tile {
  border-color: rgba(255, 255, 255, 0.07);
}

.participant-video {
  width: 100%;
  height: 100%;
  min-height: 0;
  object-fit: cover;
  display: block;
  background: #000;
}

.participant-overlay {
  position: absolute;
  left: 8px;
  right: 8px;
  bottom: 8px;
  display: flex;
  justify-content: space-between;
  gap: 6px;
  align-items: flex-end;
  z-index: 2;
}

.participant-label {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 0 7px;
  border-radius: 5px;
  background: rgba(4, 6, 10, 0.56);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 600;
  backdrop-filter: blur(8px);
  max-width: calc(100% - 56px);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.participant-overlay .badge {
  min-height: 22px;
  padding: 0 7px;
  border-radius: 5px;
  background: rgba(4, 6, 10, 0.52);
  color: rgba(255, 255, 255, 0.94);
  font-size: 0.66rem;
  font-weight: 600;
  box-shadow: none;
}

.participant-overlay .badge.muted {
  background: rgba(4, 6, 10, 0.42);
  color: rgba(244, 236, 255, 0.78);
}

.room-video-grid.view-host-only {
  grid-template-columns: 1fr !important;
  position: relative;
}

.room-video-grid.view-host-only .participant-tile[data-participant-role="host"] {
  min-height: 100%;
}

.room-video-grid.view-host-only .participant-tile.local-preview-tile {
  position: absolute;
  right: 16px;
  bottom: 16px;
  width: min(24%, 220px);
  min-width: 148px;
  min-height: 104px;
  z-index: 4;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.28);
}

.empty-grid-state {
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  border: 1px dashed rgba(255, 255, 255, 0.12);
  color: var(--muted);
  background: rgba(255, 255, 255, 0.02);
  text-align: center;
  padding: 24px;
}

.meeting-ended-message {
  width: 100%;
  min-height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
  text-align: center;
  background:
    radial-gradient(circle at center, rgba(139, 0, 139, 0.18), rgba(5, 5, 8, 0.96)),
    #050508;
  border-radius: 18px;
}

.meeting-ended-card {
  max-width: 680px;
  padding: 36px 28px;
  border-radius: 22px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.04)),
    rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.34);
}

.meeting-ended-card h2 {
  margin: 0 0 14px;
  font-size: clamp(26px, 4vw, 46px);
  line-height: 1.15;
  color: #fff;
}

.meeting-ended-card p {
  margin: 0;
  font-size: clamp(18px, 2.5vw, 28px);
  line-height: 1.35;
  color: #f3d98b;
}

.debug-pre {
  white-space: pre-wrap;
  word-break: break-word;
  margin-top: 16px;
  color: #f4ecff;
  font-size: 0.92rem;
  line-height: 1.6;
}

.developer-debug {
  display: none !important;
}

@media (max-width: 980px) {
  .admin-dock-grid,
  .admin-command-grid {
    grid-template-columns: 1fr;
  }

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

  .meeting-shell {
    grid-template-columns: 1fr;
  }

  .meeting-sidebar {
    position: static;
    max-height: none;
  }

  .participants-sidebar .participant-list {
    max-height: 320px;
  }

  .room-video-grid.count-2,
  .room-video-grid.count-3,
  .room-video-grid.count-4,
  .room-video-grid.count-5,
  .room-video-grid.count-6,
  .room-video-grid.count-7,
  .room-video-grid.count-8,
  .room-video-grid.count-9,
  .room-video-grid.count-10,
  .room-video-grid.count-11,
  .room-video-grid.count-12,
  .room-video-grid.count-13,
  .room-video-grid.count-14,
  .room-video-grid.count-15,
  .room-video-grid.count-16,
  .room-video-grid.count-17,
  .room-video-grid.count-18,
  .room-video-grid.count-19,
  .room-video-grid.count-20 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  body[data-role="host"] .page,
  body[data-role="student"] .page {
    width: min(100% - 10px, 100%);
    padding: 6px 0 8px;
    gap: 8px;
  }

  body[data-role="host"] .hero,
  body[data-role="student"] .hero,
  body[data-role="host"] .form-panel,
  body[data-role="student"] .form-panel,
  .meeting-stage,
  .meeting-sidebar {
    border-radius: 10px;
  }

  .meeting-stage {
    min-height: 320px;
  }

  .shared-meeting-shell {
    min-height: 0;
  }

  body[data-role="host"] .meeting-stage,
  body[data-role="student"] .meeting-stage {
    min-height: 320px;
  }

  body[data-role="host"] .form-panel,
  body[data-role="student"] .form-panel {
    padding: 8px 10px;
  }

  .hero-links,
  .support-links,
  .footer-links,
  .tutorial-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-links .back-link,
  .support-links .back-link,
  .footer-links .back-link,
  .tutorial-actions .back-link {
    width: 100%;
  }

  .field-grid,
  .student-entry-grid,
  .student-friendly-status {
    grid-template-columns: 1fr;
  }

  .admin-control-group {
    flex-direction: column;
    align-items: stretch;
  }

  .admin-control-group button,
  .admin-control-group .back-link {
    width: 100%;
    min-width: 0;
  }

  .room-video-grid,
  .shared-stage-grid {
    gap: 4px;
    min-height: 320px;
  }

  .participant-tile,
  .participant-video {
    min-height: 116px;
  }

  .room-video-grid.count-1 {
    grid-template-columns: 1fr;
  }

  .room-video-grid.count-2,
  .room-video-grid.count-3,
  .room-video-grid.count-4,
  .room-video-grid.count-5,
  .room-video-grid.count-6,
  .room-video-grid.count-7,
  .room-video-grid.count-8,
  .room-video-grid.count-9,
  .room-video-grid.count-10,
  .room-video-grid.count-11,
  .room-video-grid.count-12,
  .room-video-grid.count-13,
  .room-video-grid.count-14,
  .room-video-grid.count-15,
  .room-video-grid.count-16,
  .room-video-grid.count-17,
  .room-video-grid.count-18,
  .room-video-grid.count-19,
  .room-video-grid.count-20 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .room-video-grid.view-host-only .participant-tile.local-preview-tile {
    right: 10px;
    bottom: 10px;
    width: min(36%, 156px);
    min-width: 110px;
    min-height: 78px;
  }
}

@media (max-width: 560px) {
  body[data-role="host"] .hero,
  body[data-role="student"] .hero {
    padding: 10px 12px;
  }

  .meeting-stage,
  .meeting-sidebar {
    padding: 6px;
  }

  .participant-tile,
  .participant-video {
    min-height: 108px;
  }

  .participant-overlay {
    left: 8px;
    right: 8px;
    bottom: 8px;
    flex-direction: row;
    align-items: flex-end;
  }

  .participant-label,
  .participant-overlay .badge {
    font-size: 0.62rem;
  }

  .actions,
  .meeting-control-actions {
    flex-direction: column;
    align-items: stretch;
  }

  button,
  .back-link {
    width: 100%;
  }

  .participant-row {
    align-items: flex-start;
  }

  .participant-actions {
    width: 100%;
    justify-content: flex-start;
  }
}