/* Classroom Starters — live polling UI */
.cs-page {
  --cs-text: #ffffff;
  --cs-muted: rgba(255, 255, 255, 0.82);
  --pm-text: var(--cs-text);
  --pm-muted: var(--cs-muted);
  background: linear-gradient(180deg, #1a2740 0%, var(--pm-bg) 35%);
  color: var(--cs-text);
}

.cs-page h1,
.cs-page h2,
.cs-page h3,
.cs-page h4,
.cs-page .cs-starter-btn,
.cs-page .cs-option-btn,
.cs-page .cs-rating-btn,
.cs-page .cs-projector-q,
.cs-page .cs-bar-label,
.cs-page .cs-discuss,
.cs-page .cs-word,
.cs-page .cs-join-card h1,
.cs-page #cs-join-question,
.cs-page #cs-done-msg,
.cs-page #cs-waiting-msg {
  color: var(--cs-text);
}

.cs-page .pm-hub-hero p,
.cs-page .pm-hub-section-desc,
.cs-page .pm-breadcrumb,
.cs-page .cs-role-card p,
.cs-page .cs-poll-card p,
.cs-page .cs-panel h3,
.cs-page .cs-room-label,
.cs-page .cs-room-links,
.cs-page .cs-field label,
.cs-page .cs-anon-toggle,
.cs-page .cs-bar-share,
.cs-page .cs-word em,
.cs-page .cs-word-meta,
.cs-page .cs-empty,
.cs-page .cs-projector-idle,
.cs-page .cs-muted,
.cs-page .cs-status-msg:not(.ok):not(.err) {
  color: var(--cs-muted);
}

.cs-page .pm-breadcrumb a,
.cs-page .cs-room-links a,
.cs-page .pm-hub-footer a {
  color: #f9a8d4;
}

.cs-page .pm-hub-footer {
  color: var(--cs-muted);
}

/* Nav brand — join/teacher omit casequest.css; constrain logo hit area */
.cs-page .pm-hub-nav { overflow: hidden; align-items: center; }
.cs-page .pm-hub-nav .lx-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
  max-height: 48px;
}
.cs-page .pm-hub-nav .lx-brand-emblem {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  display: block;
}
.cs-page .pm-hub-nav .lx-brand-emblem img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}
.cs-page .pm-hub-nav .lx-brand-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--cs-text);
  white-space: nowrap;
}
.cs-page .cs-layout { padding-top: 72px; }
.cs-join-page { padding-top: 72px; }
.cs-room-label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
}
.cs-join-intro {
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.cs-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(236, 72, 153, 0.15);
  border: 1px solid rgba(236, 72, 153, 0.35);
  color: #f9a8d4;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.cs-hero-icon {
  width: 4rem;
  height: 4rem;
  margin: 0 auto 1rem;
  border-radius: 1.1rem;
  background: linear-gradient(135deg, #ec4899, #a855f7);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  color: #fff;
  box-shadow: 0 12px 32px rgba(236, 72, 153, 0.25);
}

.cs-role-grid {
  display: grid;
  gap: 1rem;
  margin: 1.5rem 0 2rem;
}
@media (min-width: 640px) { .cs-role-grid { grid-template-columns: 1fr 1fr; } }

.cs-role-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.25rem;
  border-radius: var(--pm-radius);
  border: 1px solid var(--pm-border);
  background: var(--pm-card);
  text-decoration: none;
  color: inherit;
  transition: transform 0.15s, border-color 0.15s;
}
.cs-role-card:hover { transform: translateY(-2px); border-color: #ec489966; }
.cs-role-card i { font-size: 1.5rem; color: #f472b6; }
.cs-role-card h3 { font-size: 1.05rem; font-weight: 700; }
.cs-role-card p { font-size: 0.875rem; color: var(--pm-muted); }

.cs-poll-grid {
  display: grid;
  gap: 0.85rem;
}
@media (min-width: 768px) { .cs-poll-grid { grid-template-columns: repeat(2, 1fr); } }

.cs-poll-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.85rem;
  align-items: center;
  padding: 1rem 1.1rem;
  border-radius: var(--pm-radius);
  border: 1px solid var(--pm-border);
  background: var(--pm-surface);
}
.cs-poll-icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.06);
  color: var(--poll-color, #ec4899);
}
.cs-poll-card h4 { font-size: 0.9375rem; font-weight: 700; margin-bottom: 0.2rem; }
.cs-poll-card p { font-size: 0.8125rem; color: var(--pm-muted); }
.cs-poll-tag {
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #f9a8d4;
}

.cs-layout {
  display: grid;
  gap: 1rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.25rem 2.5rem;
}
@media (min-width: 1024px) {
  .cs-layout { grid-template-columns: 340px 1fr; align-items: start; }
}

.cs-panel {
  background: var(--pm-surface);
  border: 1px solid var(--pm-border);
  border-radius: var(--pm-radius);
  padding: 1rem;
}

.cs-panel h3 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--pm-muted);
  margin-bottom: 0.75rem;
  font-weight: 700;
}

.cs-room-box {
  text-align: center;
  padding: 1rem;
  border-radius: 0.85rem;
  background: rgba(236, 72, 153, 0.08);
  border: 1px dashed rgba(236, 72, 153, 0.35);
  margin-bottom: 1rem;
}
.cs-room-code {
  font-family: 'Space Grotesk', 'DM Sans', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: #ffffff;
}
.cs-room-links { font-size: 0.75rem; margin-top: 0.5rem; word-break: break-all; }

.cs-panel-hint {
  font-size: 0.75rem;
  margin: -0.35rem 0 0.75rem;
  line-height: 1.45;
}
.cs-starters-heading { margin-top: 1.25rem; }

.cs-custom-form {
  padding: 0.85rem;
  border-radius: 0.85rem;
  border: 1px solid rgba(236, 72, 153, 0.28);
  background: rgba(15, 23, 42, 0.35);
  margin-bottom: 0.85rem;
}
.cs-custom-form.cs-custom-disabled { opacity: 0.55; pointer-events: none; }
.cs-type-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.35rem;
  margin-bottom: 0.5rem;
}
.cs-type-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  padding: 0.45rem 0.25rem;
  border-radius: 0.6rem;
  border: 1px solid var(--pm-border);
  background: var(--pm-card);
  color: var(--cs-muted);
  font-size: 0.65rem;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}
.cs-type-btn i { font-size: 0.85rem; }
.cs-type-btn.active {
  border-color: #ec4899;
  background: rgba(236, 72, 153, 0.14);
  color: #ffffff;
}
.cs-custom-type-hint {
  font-size: 0.7rem;
  margin: 0 0 0.65rem;
  min-height: 1rem;
}
.cs-custom-form textarea {
  width: 100%;
  padding: 0.55rem 0.65rem;
  border-radius: 0.6rem;
  border: 1px solid var(--pm-border);
  background: rgba(0, 0, 0, 0.2);
  color: #ffffff;
  font-family: inherit;
  font-size: 0.8125rem;
  resize: vertical;
  min-height: 2.5rem;
}
.cs-custom-form textarea::placeholder { color: rgba(255, 255, 255, 0.4); }
.cs-custom-options label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}
.cs-custom-opt-row {
  display: grid;
  grid-template-columns: 1.4rem 1fr;
  gap: 0.4rem;
  align-items: center;
  margin-bottom: 0.35rem;
}
.cs-custom-opt-letter {
  font-size: 0.7rem;
  font-weight: 800;
  color: #f9a8d4;
  text-align: center;
}
.cs-custom-opt-input {
  width: 100%;
  padding: 0.45rem 0.55rem;
  border-radius: 0.55rem;
  border: 1px solid var(--pm-border);
  background: rgba(0, 0, 0, 0.2);
  color: #ffffff;
  font-size: 0.8rem;
  font-family: inherit;
}
.cs-custom-opt-input::placeholder { color: rgba(255, 255, 255, 0.4); }
.cs-btn-sm { padding: 0.35rem 0.6rem; font-size: 0.72rem; margin-top: 0.25rem; }
.cs-custom-more {
  margin: 0.5rem 0;
  font-size: 0.75rem;
}
.cs-custom-more summary {
  cursor: pointer;
  color: var(--cs-muted);
  font-weight: 600;
}
.cs-custom-save-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  margin: 0.65rem 0;
  cursor: pointer;
}
.cs-launch-btn {
  width: 100%;
  justify-content: center;
  margin-top: 0.25rem;
  background: linear-gradient(135deg, #ec4899, #a855f7);
  color: #fff;
}
.cs-launch-btn:hover { filter: brightness(1.08); }
.cs-launch-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.cs-custom-saved-wrap { margin-bottom: 0.5rem; }
.cs-custom-saved-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--cs-muted);
  margin-bottom: 0.45rem;
}
.cs-custom-saved-list {
  display: grid;
  gap: 0.35rem;
  max-height: 9rem;
  overflow: auto;
}
.cs-custom-saved-empty {
  font-size: 0.72rem;
  margin: 0;
  color: var(--cs-muted);
}
.cs-saved-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.25rem;
  align-items: stretch;
}
.cs-saved-load {
  display: grid;
  gap: 0.15rem;
  text-align: left;
  padding: 0.45rem 0.55rem;
  border-radius: 0.55rem;
  border: 1px solid var(--pm-border);
  background: var(--pm-card);
  color: inherit;
  cursor: pointer;
  font-family: inherit;
  transition: border-color 0.15s;
}
.cs-saved-load:hover:not(:disabled) { border-color: #ec489966; }
.cs-saved-load:disabled { opacity: 0.45; cursor: not-allowed; }
.cs-saved-type {
  font-size: 0.62rem;
  font-weight: 800;
  text-transform: uppercase;
  color: #f9a8d4;
}
.cs-saved-q {
  font-size: 0.75rem;
  line-height: 1.35;
  color: #ffffff;
}
.cs-saved-delete {
  padding: 0.35rem 0.5rem;
  border-radius: 0.55rem;
  border: 1px solid transparent;
  background: transparent;
  color: rgba(255, 255, 255, 0.45);
  cursor: pointer;
}
.cs-saved-delete:hover { color: #f87171; border-color: rgba(248, 113, 113, 0.35); }

@media (max-width: 1100px) {
  .cs-type-row { grid-template-columns: repeat(2, 1fr); }
}

.cs-starter-list { display: grid; gap: 0.55rem; max-height: 36vh; overflow: auto; }
.cs-starter-btn {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.65rem;
  align-items: start;
  width: 100%;
  text-align: left;
  padding: 0.75rem;
  border-radius: 0.75rem;
  border: 1px solid var(--pm-border);
  background: var(--pm-card);
  color: inherit;
  cursor: pointer;
  font-family: inherit;
  transition: border-color 0.15s, background 0.15s;
}
.cs-starter-btn:hover { border-color: #ec489966; }
.cs-starter-btn.active { border-color: #ec4899; background: rgba(236, 72, 153, 0.1); }
.cs-starter-btn:disabled { opacity: 0.45; cursor: not-allowed; }

.cs-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.85rem; }
.cs-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.9rem;
  border-radius: 0.7rem;
  border: none;
  font-size: 0.8125rem;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
}
.cs-btn-primary { background: linear-gradient(135deg, #ec4899, #a855f7); color: #ffffff; }
.cs-btn-ghost { background: transparent; border: 1px solid rgba(255, 255, 255, 0.35); color: #ffffff; }
.cs-btn-danger { background: rgba(239, 68, 68, 0.15); border: 1px solid rgba(239, 68, 68, 0.35); color: #fca5a5; }
.cs-btn:disabled { opacity: 0.45; cursor: not-allowed; }

.cs-projector-wrap {
  min-height: 420px;
  background: #0f1728;
  border: 1px solid var(--pm-border);
  border-radius: 1rem;
  padding: 1.25rem;
  position: relative;
}
.cs-projector-wrap.fullscreen {
  position: fixed;
  inset: 0;
  z-index: 500;
  border-radius: 0;
  min-height: 100vh;
}

.cs-projector-top {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.cs-live-pill, .cs-room-pill, .cs-count-pill {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--pm-border);
}
.cs-live-active { background: rgba(34, 197, 94, 0.15); color: #86efac; border-color: rgba(34, 197, 94, 0.35); animation: csPulse 1.6s ease-in-out infinite; }
.cs-live-closed { background: rgba(59, 130, 246, 0.12); color: #93c5fd; }
.cs-live-idle { background: rgba(148, 174, 208, 0.12); color: rgba(255, 255, 255, 0.82); }

@keyframes csPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.65; }
}

.cs-projector-cat { font-size: 0.75rem; color: #f9a8d4; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; }
.cs-projector-q {
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.35;
  margin: 0.75rem 0 1.25rem;
  color: #ffffff;
}

.cs-bar-row { margin-bottom: 0.85rem; animation: csRowIn 0.4s ease both; }
@keyframes csRowIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.cs-bar-label { display: flex; justify-content: space-between; font-size: 0.875rem; margin-bottom: 0.3rem; }
.cs-bar-track { height: 0.85rem; background: rgba(255,255,255,0.06); border-radius: 999px; overflow: hidden; }
.cs-bar-fill { height: 100%; background: linear-gradient(90deg, #ec4899, #a855f7); border-radius: 999px; transition: width 0.45s ease; }
.cs-bar-share { font-size: 0.6875rem; margin-top: 0.15rem; text-align: right; }

.cs-word-cloud { display: flex; flex-wrap: wrap; gap: 0.55rem 0.85rem; align-items: center; min-height: 120px; }
.cs-word {
  display: inline-flex;
  align-items: baseline;
  gap: 0.25rem;
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  background: rgba(236, 72, 153, 0.12);
  border: 1px solid rgba(236, 72, 153, 0.25);
  text-transform: capitalize;
}
.cs-word { color: #ffffff; }
.cs-word em { font-style: normal; font-size: 0.7em; }
.cs-word-meta { font-size: 0.75rem; margin-top: 0.75rem; }

.cs-discuss {
  margin-top: 1.25rem;
  padding: 0.9rem 1rem;
  border-radius: 0.85rem;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.25);
  font-size: 0.9375rem;
  line-height: 1.5;
}

.cs-projector-idle { text-align: center; padding: 3rem 1rem; }
.cs-projector-idle p { color: var(--cs-muted); }
.cs-projector-code { font-size: 3rem; letter-spacing: 0.25em; color: #ffffff; font-weight: 700; margin-bottom: 0.75rem; }
.cs-muted { font-size: 0.875rem; }

.cs-join-card {
  max-width: 28rem;
  margin: 2rem auto;
  padding: 1.5rem;
  padding-bottom: calc(1.5rem + env(safe-area-inset-bottom, 0px));
  background: var(--pm-surface);
  border: 1px solid var(--pm-border);
  border-radius: 1rem;
}
.cs-join-page .cs-submit-sticky {
  position: sticky;
  bottom: 0;
  padding-top: 0.75rem;
  background: linear-gradient(180deg, transparent, var(--pm-surface) 30%);
}
.cs-field { margin-bottom: 0.85rem; }
.cs-field label { display: block; font-size: 0.75rem; font-weight: 700; margin-bottom: 0.35rem; }
.cs-field input[type="text"] {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border-radius: 0.7rem;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(0, 0, 0, 0.28);
  color: #ffffff;
  font-size: 1rem;
  font-family: inherit;
}
.cs-field input[type="text"]::placeholder { color: rgba(255, 255, 255, 0.45); }
.cs-option-grid { display: grid; gap: 0.5rem; }
.cs-option-btn {
  width: 100%;
  text-align: left;
  padding: 1rem 1.1rem;
  min-height: 3rem;
  border-radius: 0.75rem;
  border: 1px solid var(--pm-border);
  background: var(--pm-card);
  color: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
}
.cs-option-btn:hover { border-color: #ec4899; }
.cs-option-btn.selected { border-color: #ec4899; background: rgba(236, 72, 153, 0.12); }

.cs-rating-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0.45rem; }
.cs-rating-btn {
  padding: 0.85rem 0;
  border-radius: 0.7rem;
  border: 1px solid var(--pm-border);
  background: var(--pm-card);
  color: inherit;
  font-weight: 700;
  cursor: pointer;
}
.cs-rating-btn.selected { border-color: #ec4899; background: rgba(236, 72, 153, 0.15); }

.cs-anon-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  margin: 0.75rem 0;
}
.cs-status-msg { font-size: 0.8125rem; margin-top: 0.75rem; min-height: 1.2rem; }
.cs-status-msg.ok { color: #86efac; }
.cs-status-msg.err { color: #fca5a5; }
.cs-empty { text-align: center; color: var(--pm-muted); padding: 2rem 1rem; }

.cs-fs-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  z-index: 2;
}

/* ── Student join — gamified mobile UI ── */
.cs-join-panel-card {
  background: linear-gradient(165deg, #1e2a45 0%, #151d32 55%, #1a1030 100%);
  border-color: rgba(236, 72, 153, 0.25);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.cs-game-hud {
  display: flex;
  gap: 0.65rem;
  margin-bottom: 0.85rem;
}
.cs-game-stat {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.55rem 0.75rem;
  border-radius: 0.85rem;
  font-weight: 700;
  font-size: 0.875rem;
}
.cs-game-points {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.22), rgba(236, 72, 153, 0.15));
  border: 1px solid rgba(245, 158, 11, 0.35);
}
.cs-game-streak {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.18), rgba(249, 115, 22, 0.12));
  border: 1px solid rgba(249, 115, 22, 0.35);
}
.cs-game-emoji { font-size: 1.1rem; line-height: 1; }
.cs-game-value { font-size: 1.15rem; color: #ffffff; }
.cs-game-label { font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.06em; color: rgba(255, 255, 255, 0.7); }

.cs-progress-track {
  height: 0.35rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 0.85rem;
}
.cs-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #ec4899, #a855f7, #3b82f6);
  border-radius: 999px;
  transition: width 0.45s cubic-bezier(0.34, 1.2, 0.64, 1);
}

.cs-join-waiting {
  margin-top: 0.5rem;
  text-align: center;
  padding: 1.25rem 0;
}
.cs-waiting-pulse {
  width: 3.5rem;
  height: 3.5rem;
  margin: 0 auto 0.75rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #f472b6;
  background: rgba(236, 72, 153, 0.15);
  border: 1px solid rgba(236, 72, 153, 0.35);
  animation: csWaitPulse 1.8s ease-in-out infinite;
}
@keyframes csWaitPulse {
  0%, 100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(236, 72, 153, 0.35); }
  50% { transform: scale(1.06); box-shadow: 0 0 0 12px rgba(236, 72, 153, 0); }
}
.cs-waiting-hint {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 0.35rem;
}

.cs-live-banner {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #86efac;
  margin-bottom: 0.5rem;
  padding: 0.4rem 0.65rem;
  border-radius: 0.6rem;
  background: rgba(34, 197, 94, 0.12);
  border: 1px solid rgba(34, 197, 94, 0.3);
}
.cs-live-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: #22c55e;
  animation: csPulse 1.4s ease-in-out infinite;
}

.cs-page #cs-join-question {
  font-size: 1.15rem;
  line-height: 1.4;
  margin: 0.5rem 0 1rem;
}

.cs-option-btn {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-left: 4px solid var(--cs-opt-accent, #ec4899);
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  transition: transform 0.15s, border-color 0.15s, background 0.15s, box-shadow 0.15s;
}
.cs-option-letter {
  flex-shrink: 0;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  font-weight: 800;
  color: #ffffff;
  background: var(--cs-opt-accent, #ec4899);
}
.cs-option-btn:hover {
  border-color: var(--cs-opt-accent, #ec4899);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}
.cs-option-btn.selected {
  border-color: var(--cs-opt-accent, #ec4899);
  background: linear-gradient(90deg, rgba(236, 72, 153, 0.2), rgba(168, 85, 247, 0.1));
  box-shadow: 0 0 0 2px rgba(236, 72, 153, 0.35);
}
.cs-tap-pop { animation: csTapPop 0.35s ease; }
@keyframes csTapPop {
  0% { transform: scale(1); }
  45% { transform: scale(1.03); }
  100% { transform: scale(1); }
}

.cs-rating-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  font-size: 0.75rem;
  transition: transform 0.15s, border-color 0.15s, background 0.15s;
}
.cs-rating-face { font-size: 1.35rem; line-height: 1; }
.cs-rating-btn.selected {
  transform: scale(1.05);
  box-shadow: 0 0 0 2px rgba(236, 72, 153, 0.4);
}

.cs-submit-btn {
  width: 100%;
  justify-content: center;
  min-height: 3rem;
  font-size: 0.9375rem;
  box-shadow: 0 8px 24px rgba(236, 72, 153, 0.35);
}
.cs-submit-btn.cs-submitting {
  opacity: 0.75;
  pointer-events: none;
}

.cs-join-done {
  text-align: center;
  padding: 1.5rem 0;
}
.cs-celebrate {
  font-size: 3rem;
  line-height: 1;
  margin-bottom: 0.75rem;
}
.cs-celebrate-pop { animation: csCelebrate 0.65s cubic-bezier(0.34, 1.4, 0.64, 1); }
@keyframes csCelebrate {
  0% { transform: scale(0.4) rotate(-12deg); opacity: 0; }
  55% { transform: scale(1.15) rotate(6deg); opacity: 1; }
  100% { transform: scale(1) rotate(0); opacity: 1; }
}
.cs-page #cs-done-msg {
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
}
.cs-done-reward {
  font-size: 0.875rem;
  font-weight: 600;
  color: #fbbf24;
  margin: 0;
}

.cs-student-id-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-size: 0.8125rem;
  padding: 0.5rem 0.75rem;
  margin-bottom: 0.65rem;
  border-radius: 0.75rem;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.35);
  color: rgba(255, 255, 255, 0.9);
}
.cs-student-id-badge strong {
  color: #93c5fd;
  letter-spacing: 0.06em;
}

.cs-subject-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: #f9a8d4;
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
  background: rgba(236, 72, 153, 0.12);
  border: 1px solid rgba(236, 72, 153, 0.3);
  margin-bottom: 0.65rem;
}

.cs-subject-picker {
  display: grid;
  gap: 1rem;
  margin-bottom: 2rem;
}
@media (min-width: 640px) { .cs-subject-picker { grid-template-columns: repeat(3, 1fr); } }

.cs-subject-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.25rem;
  border-radius: var(--pm-radius);
  border: 1px solid var(--pm-border);
  background: var(--pm-card);
  text-decoration: none;
  color: inherit;
  transition: transform 0.15s, border-color 0.15s;
}
.cs-subject-card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--subject-color, #ec4899) 55%, transparent);
}
.cs-subject-card i {
  font-size: 1.75rem;
  color: var(--subject-color, #ec4899);
}
.cs-subject-card h3 { font-size: 1.05rem; font-weight: 700; }
.cs-subject-card p { font-size: 0.875rem; color: var(--cs-muted); }
.cs-subject-card span { font-size: 0.75rem; color: #f9a8d4; font-weight: 600; }

/* ── Projector gamification ── */
.cs-proj-stats {
  display: grid;
  gap: 0.85rem;
  margin-bottom: 1rem;
}
@media (min-width: 768px) {
  .cs-proj-stats { grid-template-columns: 1fr 1fr; }
}

.cs-participation-card {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem 1rem;
  border-radius: 0.9rem;
  background: rgba(34, 197, 94, 0.08);
  border: 1px solid rgba(34, 197, 94, 0.25);
}
.cs-participation-ring {
  --cs-pct: 0;
  width: 4.25rem;
  height: 4.25rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: conic-gradient(#22c55e calc(var(--cs-pct) * 1%), rgba(255,255,255,0.08) 0);
  position: relative;
  flex-shrink: 0;
}
.cs-participation-ring::after {
  content: '';
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background: #0f1728;
}
.cs-participation-value {
  position: relative;
  z-index: 1;
  font-size: 0.95rem;
  font-weight: 800;
  color: #86efac;
}
.cs-participation-meta {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.82);
}
.cs-participation-meta strong {
  color: #ffffff;
  font-size: 0.875rem;
}

.cs-top-responders {
  padding: 0.85rem 1rem;
  border-radius: 0.9rem;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.28);
}
.cs-top-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #fbbf24;
  margin-bottom: 0.55rem;
}
.cs-top-row {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.35rem 0;
  animation: csRowIn 0.4s ease both;
}
.cs-top-id {
  flex: 1;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #ffffff;
}
.cs-top-count {
  font-size: 0.75rem;
  font-weight: 700;
  color: #fbbf24;
}
.cs-top-empty, .cs-feed-waiting {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.65);
  padding: 0.35rem 0;
}

.cs-live-feed-wrap { margin-bottom: 1rem; }
.cs-live-feed {
  padding: 0.85rem 1rem;
  border-radius: 0.9rem;
  background: rgba(168, 85, 247, 0.08);
  border: 1px solid rgba(168, 85, 247, 0.25);
}
.cs-live-feed-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #d8b4fe;
  margin-bottom: 0.6rem;
}
.cs-live-bubbles {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  min-height: 2.5rem;
}
.cs-bubble {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.65rem 0.35rem 0.35rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid color-mix(in srgb, var(--bubble-color, #ec4899) 45%, transparent);
  animation: csRowIn 0.35s ease both;
}
.cs-bubble-pop { animation: csBubblePop 0.55s cubic-bezier(0.34, 1.4, 0.64, 1); }
@keyframes csBubblePop {
  0% { transform: scale(0.5); opacity: 0; }
  60% { transform: scale(1.08); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}
.cs-bubble-text {
  font-size: 0.75rem;
  font-weight: 600;
  color: #ffffff;
  max-width: 8rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cs-avatar {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6875rem;
  font-weight: 800;
  color: #ffffff;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}
.cs-avatar-sm {
  width: 1.5rem;
  height: 1.5rem;
  font-size: 0.625rem;
}

.cs-pill-bump { animation: csPillBump 0.45s ease; }
@keyframes csPillBump {
  0% { transform: scale(1); }
  40% { transform: scale(1.12); }
  100% { transform: scale(1); }
}