* { box-sizing: border-box; }
body {
  font-family: "Segoe UI", "Segoe UI Emoji", "Apple Color Emoji", "Noto Color Emoji", Tahoma, sans-serif;
  margin: 0; padding: 24px;
  background: #0f1220; color: #eaeaf0;
  transition: background .25s, color .25s;
}
.center { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 90vh; text-align: center; }
h1 { margin: 0 0 8px; }
.sub { color: #9aa0b4; }

.row { display: flex; gap: 16px; margin-top: 24px; flex-wrap: wrap; justify-content: center; }

.btn {
  padding: 16px 28px; border-radius: 14px; text-decoration: none;
  background: #2a2f4a; color: #fff; font-weight: 600;
}
.btn.alt { background: #4a2a3f; }
.btn.big { font-size: 20px; }

.code-box { background:#1a1f38; padding:8px 14px; border-radius:10px; }
.code-box b { font-size: 22px; letter-spacing: 4px; color:#7dffb0; }

header { display:flex; justify-content: space-between; align-items:center; gap: 16px; margin-bottom: 16px; }
.header-right { display:flex; align-items:center; gap:12px; }

.ask { display:flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
.ask input { flex:1; min-width: 200px; padding: 14px; border-radius: 12px; border: none; font-size: 16px; background:#1a1f38; color:#fff; }
.ask button, .card button, .ghost { padding: 14px 20px; border: none; border-radius: 12px; background:#3b6cff; color:#fff; font-weight: 600; cursor: pointer; }
.ghost { background: #2a2f4a; margin-top: 20px; }

.current-q { font-size: 20px; margin: 12px 0; min-height: 28px; }

.legend { display:flex; align-items:center; gap: 8px; margin: 12px 0; flex-wrap: wrap; }
.dot { width: 14px; height: 14px; border-radius: 50%; display:inline-block; margin-left: 10px;}
.green { background: #2ecc71; }
.yellow { background: #f1c40f; }
.red { background: #e74c3c; }
.counter { margin-left: auto; font-family: monospace; font-size: 18px; }

.map { display: flex; flex-wrap: wrap; gap: 10px; margin: 16px 0; min-height: 60px; }
.card-student {
  padding: 14px 18px; border-radius: 12px; font-weight: 600;
  background: #2a2f4a; border: 2px solid transparent;
  transition: background .2s, border-color .2s, color .2s, transform .2s, box-shadow .2s;
}
.card-student.green { background:#1e7a4a; }
.card-student.yellow { background:#a98b0d; }
.card-student.red { background:#a8352a; }
.card-student.none { background:#2a2f4a; opacity:.6; }

.advice { background:#1a1f38; padding: 16px; border-radius: 14px; margin-top: 16px; border-left: 4px solid #3b6cff; }
.advice h3 { margin: 0 0 8px; }
.advice p { margin: 0; color: #cfd3e3; }

.qr-section { margin-top: 16px; text-align: center; }
.qr-box {
  margin-top: 12px; padding: 16px;
  background: #fff; border-radius: 14px;
  display: inline-block;
}
.qr-box img { display: block; margin: 8px auto 0; width: 220px; height: 220px; }
.qr-box .sub { color: #333; margin: 0 0 8px; }

.card { display: flex; flex-direction: column; gap: 12px; width: min(360px, 90vw); }
.card input { padding: 16px; border-radius: 12px; border: none; font-size: 18px; background:#1a1f38; color:#fff; text-align: center; }

.question { font-size: 22px; margin: 24px 0; max-width: 640px; }
.answers { display:flex; flex-direction: column; gap: 14px; width: min(420px, 90vw); }
.ans { padding: 24px; font-size: 20px; border: none; border-radius: 16px; color: #fff; font-weight: 700; cursor: pointer; }
.ans.green { background: #2ecc71; color: #06210f; }
.ans.yellow { background: #f1c40f; color: #2a2100; }
.ans.red { background: #e74c3c; }
.ans:disabled { opacity: 0.4; cursor: default; }
.err { color: #ff7b7b; }

.theme-toggle {
  background: #2a2f4a;
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 44px;
  height: 44px;
  font-size: 20px;
  cursor: pointer;
  transition: background .2s, color .2s;
}
.theme-toggle:hover { background: #3a4060; }

body.center .theme-toggle {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 1000;
}

.anon-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  background: #1a1f38;
  padding: 8px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 14px;
  user-select: none;
  transition: background .2s;
}
.anon-toggle:hover { background: #252a48; }
.anon-toggle input {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: #3b6cff;
}

/* Таймер — селектор */
.timer-select {
  padding: 14px 12px;
  border-radius: 12px;
  border: none;
  font-size: 15px;
  background: #1a1f38;
  color: #eaeaf0;
  cursor: pointer;
  font-family: inherit;
}

/* Таймер — обратный отсчёт */
.timer-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 12px auto;
  padding: 12px 28px;
  border-radius: 50px;
  background: #1a1f38;
  border: 2px solid #3b6cff;
  font-size: 36px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  min-width: 120px;
  transition: background .3s, border-color .3s, color .3s;
}
.timer-box.warning { border-color: #f1c40f; color: #f1c40f; }
.timer-box.expired { border-color: #e74c3c; background: #3a1212; color: #e74c3c; }

/* Случайный ученик */
.card-student.picked {
  border-color: #f39c12;
  box-shadow: 0 0 0 3px #f39c12, 0 0 24px rgba(243, 156, 18, .5);
  transform: scale(1.08);
}
.picked-box {
  display: flex;
  align-items: center;
  gap: 14px;
  background: linear-gradient(90deg, #3d2a00, #4a3a10);
  border: 2px solid #f39c12;
  border-radius: 14px;
  padding: 14px 20px;
  margin: 12px 0;
  font-size: 18px;
  animation: pulse-border 1.6s infinite;
}
.picked-label { color: #f5c06b; font-weight: 600; }
.picked-name { font-size: 22px; font-weight: 800; color: #ffd47f; flex: 1; }
.ghost-small {
  background: transparent; border: none; color: #f5c06b;
  font-size: 20px; cursor: pointer; padding: 4px 10px; border-radius: 8px;
}
.ghost-small:hover { background: rgba(255,255,255,.1); }

@keyframes pulse-border {
  0%, 100% { box-shadow: 0 0 0 0 rgba(243, 156, 18, .6); }
  50%      { box-shadow: 0 0 0 10px rgba(243, 156, 18, 0); }
}

.random-section { display: flex; gap: 10px; margin: 16px 0; flex-wrap: wrap; }
.btn-random {
  flex: 1;
  padding: 14px 20px;
  border: none;
  border-radius: 12px;
  background: #f39c12;
  color: #1a1d29;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  transition: background .15s, transform .1s;
  font-family: inherit;
}
.btn-random:hover { background: #ffb93d; }
.btn-random:active { transform: scale(0.98); }
.btn-random-alt { background: #6c4a12; color: #ffd88a; }
.btn-random-alt:hover { background: #8a5f1a; }

.picked-banner {
  margin: 16px auto;
  padding: 16px 24px;
  background: linear-gradient(90deg, #3d2a00, #4a3a10);
  border: 2px solid #f39c12;
  border-radius: 14px;
  font-size: 18px;
  font-weight: 700;
  color: #ffd47f;
  max-width: 90vw;
  animation: pulse-border 1.6s infinite;
}

/* История вопросов */
.history-section {
  margin-top: 20px;
  padding: 16px;
  background: #1a1f38;
  border-radius: 14px;
}
.history-section h3 { margin: 0 0 12px; font-size: 16px; }
.history-list { display: flex; flex-direction: column; gap: 8px; }
.history-row {
  display: grid;
  grid-template-columns: 36px 1fr 120px auto 48px;
  gap: 10px;
  align-items: center;
  font-size: 13px;
  padding: 6px 0;
  border-bottom: 1px solid #2a2f4a;
}
.history-row:last-child { border-bottom: none; }
.history-num { color: #6a7290; font-family: monospace; }
.history-q { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.history-bar { height: 8px; background: #2a2f4a; border-radius: 4px; overflow: hidden; }
.history-fill { display: block; height: 100%; background: linear-gradient(90deg, #2ecc71, #7dffb0); transition: width .4s; }
.history-stats { color: #9aa0b4; font-family: monospace; white-space: nowrap; }
.history-pct { text-align: right; font-weight: 700; color: #7dffb0; font-family: monospace; }

/* Финальный экран */
.action-row { display: flex; gap: 10px; margin-top: 20px; flex-wrap: wrap; }
.btn-finish {
  padding: 14px 24px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(90deg, #7d3cff, #3b6cff);
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  transition: filter .15s, transform .1s;
  font-family: inherit;
}
.btn-finish:hover { filter: brightness(1.15); }
.btn-finish:active { transform: scale(0.98); }

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .7);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  overflow-y: auto;
}
.modal-content {
  background: #1a1f38;
  padding: 28px;
  border-radius: 20px;
  max-width: 680px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  border: 1px solid #2a2f4a;
}
.modal-content h2 { margin: 0 0 20px; }
.modal-content h3 {
  margin: 24px 0 12px;
  font-size: 15px;
  color: #9aa0b4;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.summary-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.stat { background: #0f1220; padding: 16px; border-radius: 12px; text-align: center; }
.stat-num { font-size: 32px; font-weight: 800; color: #7dffb0; font-variant-numeric: tabular-nums; }
.stat-label { font-size: 12px; color: #9aa0b4; margin-top: 4px; }

.summary-chart { display: flex; flex-direction: column; gap: 8px; }
.chart-row { display: grid; grid-template-columns: 36px 1fr 56px; gap: 10px; align-items: center; font-size: 13px; }
.chart-label { color: #6a7290; font-family: monospace; }
.chart-bar { height: 12px; background: #0f1220; border-radius: 6px; overflow: hidden; }
.chart-fill { display: block; height: 100%; background: linear-gradient(90deg, #2ecc71, #7dffb0); transition: width .5s; }
.chart-pct { text-align: right; font-weight: 700; color: #7dffb0; font-family: monospace; }

.modal-actions { display: flex; gap: 10px; margin-top: 24px; justify-content: flex-end; flex-wrap: wrap; }

/* ==== СВЕТЛАЯ ТЕМА ==== */
body.light { background: #f4f6fb; color: #1a1d29; }
body.light .sub { color: #6a7290; }
body.light .btn { background: #e0e5f0; color: #1a1d29; }
body.light .btn.alt { background: #f0e0e8; }
body.light .code-box { background: #e0e5f0; color: #1a1d29; }
body.light .code-box b { color: #0a8a3f; }
body.light .ask input { background: #fff; color: #1a1d29; border: 1px solid #d0d5e0; }
body.light .ghost { background: #e0e5f0; color: #1a1d29; }
body.light .card-student { background: #e0e5f0; color: #1a1d29; }
body.light .card-student.green { background: #7ee0a3; color: #0a2415; }
body.light .card-student.yellow { background: #f5d76e; color: #2a2100; }
body.light .card-student.red { background: #f28b82; color: #2a0606; }
body.light .card-student.none { background: #e0e5f0; color: #6a7290; }
body.light .advice { background: #e0e5f0; }
body.light .advice p { color: #4a5070; }
body.light .card input { background: #fff; color: #1a1d29; border: 1px solid #d0d5e0; }
body.light .theme-toggle { background: #e0e5f0; color: #1a1d29; }
body.light .theme-toggle:hover { background: #d0d5e5; }
body.light .anon-toggle { background: #e0e5f0; color: #1a1d29; }
body.light .anon-toggle:hover { background: #d0d5e5; }
body.light .legend { color: #4a5070; }
body.light .counter { color: #1a1d29; }
body.light .timer-select { background: #fff; color: #1a1d29; border: 1px solid #d0d5e0; }
body.light .timer-box { background: #fff; color: #1a1d29; }
body.light .timer-box.warning { color: #a98b0d; border-color: #a98b0d; }
body.light .timer-box.expired { background: #ffe5e5; color: #c0392b; }
body.light .picked-box { background: linear-gradient(90deg, #fff5d6, #ffe9a8); border-color: #d68910; }
body.light .picked-label { color: #8a5a00; }
body.light .picked-name { color: #6b4400; }
body.light .ghost-small { color: #8a5a00; }
body.light .picked-banner { background: linear-gradient(90deg, #fff5d6, #ffe9a8); border-color: #d68910; color: #6b4400; }
body.light .history-section { background: #e0e5f0; }
body.light .history-row { border-bottom-color: #d0d5e0; }
body.light .history-bar { background: #c8cee0; }
body.light .history-num { color: #6a7290; }
body.light .history-stats { color: #6a7290; }
body.light .history-pct { color: #0a8a3f; }
body.light .modal-content { background: #f4f6fb; border-color: #d0d5e0; }
body.light .stat { background: #e0e5f0; }
body.light .stat-num { color: #0a8a3f; }
body.light .stat-label { color: #6a7290; }
body.light .chart-bar { background: #e0e5f0; }
body.light .chart-label { color: #6a7290; }
body.light .chart-pct { color: #0a8a3f; }
body.light .modal-content h3 { color: #6a7290; }

/* ---- Ссылка-приглашение ---- */
.invite-box {
  background: #1a1f38;
  padding: 16px 20px;
  border-radius: 14px;
  margin-bottom: 16px;
  border-left: 4px solid #7d3cff;
}
.invite-text {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
  font-size: 14px;
}
.invite-label { color: #9aa0b4; }
.invite-link {
  font-family: Consolas, monospace;
  font-size: 13px;
  color: #b19dff;
  word-break: break-all;
}
.invite-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}
.btn-invite {
  padding: 10px 16px;
  border: none;
  border-radius: 10px;
  background: #7d3cff;
  color: #fff;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: filter .15s;
  font-family: inherit;
}
.btn-invite:hover { filter: brightness(1.15); }
.btn-invite-alt { background: #4a2f7a; }
.invited-counter {
  margin-left: auto;
  font-size: 13px;
  color: #9aa0b4;
}
.invited-counter b { color: #b19dff; font-size: 15px; }

body.light .invite-box { background: #e0e5f0; border-left-color: #7d3cff; }
body.light .invite-link { color: #5c3bbf; }

/* ---- Строка присутствия ---- */
.presence-bar {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  padding: 12px 16px;
  background: #1a1f38;
  border-radius: 12px;
  margin: 12px 0;
  font-size: 14px;
}
.presence-item { color: #9aa0b4; }
.presence-item b { color: #eaeaf0; font-size: 16px; }
body.light .presence-bar { background: #e0e5f0; }
body.light .presence-item { color: #6a7290; }
body.light .presence-item b { color: #1a1d29; }

/* ---- Карточка ученика — дополнительные состояния ---- */
.card-student.hand-raised {
  border-color: #f1c40f;
  box-shadow: 0 0 0 2px #f1c40f;
  position: relative;
}
.card-student.hand-raised .hand-badge {
  position: absolute;
  top: -8px;
  right: -8px;
  background: #f1c40f;
  color: #1a1d29;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  animation: hand-wave 1.2s infinite;
}
@keyframes hand-wave {
  0%, 100% { transform: rotate(-15deg); }
  50%      { transform: rotate(15deg); }
}

.card-student.unfocused {
  opacity: 0.55;
  border-color: #6a7290;
  filter: grayscale(0.4);
}
.card-student.unfocused .unfocused-badge {
  position: absolute;
  top: -8px;
  right: -8px;
  background: #6a7290;
  color: #fff;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
}

/* ---- Кнопка «Поднять руку» ---- */
.btn-hand {
  margin-top: 20px;
  padding: 16px 28px;
  font-size: 16px;
  font-weight: 700;
  border: 2px solid #f1c40f;
  border-radius: 14px;
  background: transparent;
  color: #f1c40f;
  cursor: pointer;
  font-family: inherit;
  transition: all .15s;
}
.btn-hand:hover { background: rgba(241, 196, 15, .1); }
.btn-hand.raised {
  background: #f1c40f;
  color: #2a2100;
  animation: pulse-border 1.2s infinite;
}
body.light .btn-hand { color: #a98b0d; border-color: #a98b0d; }
body.light .btn-hand.raised { background: #a98b0d; color: #fff; }

/* ---- Двухколоночная раскладка ---- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 16px;
  align-items: start;
}
@media (max-width: 900px) {
  .two-col { grid-template-columns: 1fr; }
}
.col-main, .col-side { min-width: 0; }

/* ---- Секция вопросов от учеников ---- */
.questions-section {
  background: #1a1f38;
  padding: 16px;
  border-radius: 14px;
  border-left: 4px solid #7d3cff;
}
.questions-section h3 {
  margin: 0 0 12px;
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.questions-section .badge {
  background: #7d3cff;
  color: #fff;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 12px;
  font-weight: 700;
}
.questions-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 400px;
  overflow-y: auto;
}
.question-item {
  background: #0f1220;
  padding: 10px 12px;
  border-radius: 10px;
  border-left: 3px solid #7d3cff;
  font-size: 13px;
  transition: opacity .2s;
}
.question-item.answered {
  opacity: 0.45;
  border-left-color: #2ecc71;
}
.question-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
}
.question-who {
  font-size: 11px;
  color: #9aa0b4;
  font-weight: 600;
}
.question-actions { display: flex; gap: 4px; }
.q-act {
  background: transparent;
  border: none;
  color: #7d9dff;
  cursor: pointer;
  font-size: 14px;
  padding: 2px 6px;
  border-radius: 6px;
}
.q-act:hover { background: rgba(125, 157, 255, .15); }
.q-act-del { color: #ff7b7b; }
.q-act-del:hover { background: rgba(231, 76, 60, .15); }
.question-text { color: #eaeaf0; line-height: 1.4; }

body.light .questions-section { background: #e0e5f0; }
body.light .question-item { background: #fff; }
body.light .question-text { color: #1a1d29; }

/* ---- Лента реакций ---- */
.reactions-strip {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  background: #1a1f38;
  border-radius: 12px;
  margin: 16px 0;
  min-height: 52px;
}
.reactions-label {
  color: #9aa0b4;
  font-size: 13px;
  white-space: nowrap;
}
.reactions-list {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  flex: 1;
}
.reactions-empty { color: #4a5070; font-size: 13px; font-style: italic; }
.reaction-item {
  font-size: 24px;
  position: relative;
  animation: reaction-pop .4s;
}
.reaction-count {
  position: absolute;
  bottom: -4px;
  right: -8px;
  background: #3b6cff;
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  border-radius: 10px;
  padding: 1px 6px;
  min-width: 16px;
  text-align: center;
}
@keyframes reaction-pop {
  0% { transform: scale(0.3); opacity: 0; }
  60% { transform: scale(1.15); }
  100% { transform: scale(1); opacity: 1; }
}
body.light .reactions-strip { background: #e0e5f0; }
body.light .reactions-label { color: #6a7290; }
body.light .reactions-empty { color: #a0a5c0; }

/* ---- Панель реакций у ученика ---- */
.reactions-panel {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid #2a2f4a;
  width: min(420px, 90vw);
}
.reactions-buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 8px;
}
.reaction-btn {
  font-size: 26px;
  padding: 10px;
  background: #1a1f38;
  border: 1px solid #2a2f4a;
  border-radius: 12px;
  cursor: pointer;
  transition: transform .15s, background .15s, border-color .15s;
}
.reaction-btn:hover {
  background: #252a48;
  border-color: #3b6cff;
  transform: scale(1.08);
}
.reaction-btn:active { transform: scale(0.95); }
.reaction-btn.flash {
  background: #3b6cff;
  border-color: #7d9dff;
  transform: scale(1.15);
}
body.light .reactions-panel { border-top-color: #d0d5e0; }
body.light .reaction-btn { background: #fff; border-color: #d0d5e0; }
body.light .reaction-btn:hover { background: #eef1ff; }

/* ---- Панель вопросов у ученика ---- */
.ask-question-panel {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid #2a2f4a;
  width: min(420px, 90vw);
}
.ask-q-row {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}
.ask-q-row input {
  flex: 1;
  padding: 12px 14px;
  border-radius: 12px;
  border: none;
  background: #1a1f38;
  color: #eaeaf0;
  font-size: 14px;
  font-family: inherit;
}
.ask-q-row button {
  padding: 12px 18px;
  border: none;
  border-radius: 12px;
  background: #7d3cff;
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
}
.ask-q-row button:hover { filter: brightness(1.15); }
body.light .ask-question-panel { border-top-color: #d0d5e0; }
body.light .ask-q-row input { background: #fff; color: #1a1d29; border: 1px solid #d0d5e0; }

/* ---- Панель режимов ---- */
.mode-panel {
  background: #1a1f38;
  padding: 14px 18px;
  border-radius: 14px;
  margin-bottom: 16px;
  border-left: 4px solid #3b6cff;
}
.mode-row, .keywords-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.mode-row {
  margin-bottom: 12px;
}

.keywords-row {
  margin-top: 12px;
}
.keywords-row { margin-top: 10px; }
.mode-label {
  font-size: 13px;
  color: #9aa0b4;
  font-weight: 600;
  white-space: nowrap;
}
.mode-btn {
  padding: 10px 16px;
  border: 1px solid #2a2f4a;
  border-radius: 10px;
  background: #0f1220;
  color: #eaeaf0;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
  transition: background .15s, border-color .15s, color .15s;
}
.mode-btn:hover { background: #252a48; }
.mode-btn.active {
  background: #3b6cff;
  border-color: #5580ff;
  color: #fff;
}
.keywords-input {
  flex: 1;
  min-width: 200px;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid #2a2f4a;
  background: #0f1220;
  color: #eaeaf0;
  font-size: 14px;
  font-family: inherit;
}

body.light .mode-panel { background: #e0e5f0; }
body.light .mode-label { color: #6a7290; }
body.light .mode-btn { background: #fff; color: #1a1d29; border-color: #d0d5e0; }
body.light .mode-btn.active { background: #3b6cff; color: #fff; }
body.light .keywords-input { background: #fff; color: #1a1d29; border-color: #d0d5e0; }

/* ---- Карточки с текстовыми ответами ---- */
.map.with-text {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 12px;
}
.card-student.wide {
  padding: 12px 14px;
  border-radius: 12px;
  opacity: 1;
}
.card-name-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  margin-bottom: 6px;
}
.card-name {
  font-weight: 700;
  font-size: 13px;
}
.card-text {
  font-size: 13px;
  line-height: 1.4;
  font-weight: 400;
  word-wrap: break-word;
}
.card-text.empty {
  opacity: 0.5;
  font-style: italic;
}
.card-text mark {
  background: rgba(125, 255, 176, .35);
  color: inherit;
  padding: 0 2px;
  border-radius: 3px;
}
body.light .card-text mark {
  background: rgba(10, 138, 63, .25);
}
.card-meta {
  margin-top: 6px;
  font-size: 11px;
  opacity: 0.7;
  font-family: monospace;
}

/* ---- Текстовый ответ у ученика ---- */
.text-answer-block {
  width: min(420px, 90vw);
  margin: 20px 0;
}
.answer-textarea {
  width: 100%;
  min-height: 120px;
  padding: 14px;
  border-radius: 12px;
  border: 1px solid #2a2f4a;
  background: #1a1f38;
  color: #eaeaf0;
  font-size: 16px;
  font-family: inherit;
  resize: vertical;
  box-sizing: border-box;
}
.answer-textarea:focus {
  outline: none;
  border-color: #3b6cff;
}
.text-answer-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 8px;
}
.char-count {
  font-size: 12px;
  color: #6a7290;
  font-family: monospace;
}
.btn-send-text {
  padding: 12px 24px;
  border: none;
  border-radius: 12px;
  background: #3b6cff;
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  font-family: inherit;
}
.btn-send-text:hover { filter: brightness(1.15); }
.btn-send-text:active { transform: scale(0.98); }

body.light .answer-textarea {
  background: #fff;
  color: #1a1d29;
  border-color: #d0d5e0;
}

/* ---- Индикация выбранного ответа ---- */
.ans {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  transition: transform .15s, opacity .25s, filter .25s, box-shadow .25s;
}
.ans-emoji { font-size: 26px; }
.ans-text { font-size: 20px; }
.ans-check {
  position: absolute;
  right: 18px;
  font-size: 22px;
  font-weight: 900;
  opacity: 0;
  transform: scale(0.5);
  transition: opacity .2s, transform .3s;
}

/* Выбранная кнопка */
.ans.selected {
  box-shadow: 0 0 0 4px currentColor inset,
              0 8px 24px rgba(0, 0, 0, .35);
  transform: scale(1.04);
  animation: pop-selected .4s;
}
.ans.selected .ans-check {
  opacity: 1;
  transform: scale(1);
}
.ans.selected.green { box-shadow: 0 0 0 4px #0e5d33 inset, 0 8px 24px rgba(46, 204, 113, .4); }
.ans.selected.yellow { box-shadow: 0 0 0 4px #6b5300 inset, 0 8px 24px rgba(241, 196, 15, .4); }
.ans.selected.red { box-shadow: 0 0 0 4px #6b1500 inset, 0 8px 24px rgba(231, 76, 60, .4); }

/* Невыбранные кнопки — притухают */
.ans.not-selected {
  opacity: 0.45;
  filter: grayscale(0.5);
  transform: scale(0.96);
}
.ans.not-selected:hover {
  opacity: 0.8;
  filter: grayscale(0.2);
}

@keyframes pop-selected {
  0% { transform: scale(1); }
  50% { transform: scale(1.12); }
  100% { transform: scale(1.04); }
}

/* ---- Toast «Ответ отправлен» ---- */
.answered-toast {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 50px;
  background: #1a1f38;
  border: 2px solid #3b6cff;
  color: #eaeaf0;
  font-weight: 700;
  font-size: 15px;
  margin: 12px auto;
  opacity: 0;
  transform: translateY(-10px) scale(0.9);
  transition: opacity .3s, transform .3s;
  pointer-events: none;
}
.answered-toast.show {
  opacity: 1;
  transform: translateY(0) scale(1);
}
.answered-toast.show.green {
  border-color: #2ecc71;
  color: #7dffb0;
  background: #0e2a1a;
}
.answered-toast.show.yellow {
  border-color: #f1c40f;
  color: #ffe066;
  background: #2a2100;
}
.answered-toast.show.red {
  border-color: #e74c3c;
  color: #ff8a7a;
  background: #2a0a06;
}
body.light .answered-toast {
  background: #fff;
  color: #1a1d29;
}
body.light .answered-toast.show.green { background: #e5ffe9; color: #0a8a3f; }
body.light .answered-toast.show.yellow { background: #fff8dc; color: #a98b0d; }
body.light .answered-toast.show.red { background: #ffe5e5; color: #c0392b; }

/* ---- Текст-ответ: индикация отправки ---- */
.answer-textarea {
  transition: border-color .2s, background .2s;
}
.answer-textarea.sent {
  border-color: #2ecc71 !important;
  background: rgba(46, 204, 113, .08) !important;
  animation: text-sent-pulse .6s;
}
body.light .answer-textarea.sent {
  background: #e5ffe9 !important;
}
@keyframes text-sent-pulse {
  0% { box-shadow: 0 0 0 0 rgba(46, 204, 113, .5); }
  100% { box-shadow: 0 0 0 14px rgba(46, 204, 113, 0); }
}

/* ---- Диагностика ---- */
.diag-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.diag-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: #1a1f38;
  border-radius: 14px;
  border-left: 4px solid #2a2f4a;
  transition: border-color .2s;
}
.diag-row.available { border-left-color: #2ecc71; }
.diag-row.unavailable { border-left-color: #e74c3c; opacity: 0.6; }
.diag-status {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 900;
  flex-shrink: 0;
}
.diag-status.ok { background: #2ecc71; color: #06210f; }
.diag-status.fail { background: #e74c3c; color: #fff; }
.diag-info { flex: 1; min-width: 0; }
.diag-label { font-weight: 700; font-size: 15px; margin-bottom: 4px; }
.diag-url {
  font-family: Consolas, monospace;
  font-size: 13px;
  color: #7dffb0;
  word-break: break-all;
  margin-bottom: 4px;
}
.diag-row.unavailable .diag-url { color: #6a7290; }
.diag-note { font-size: 12px; color: #9aa0b4; }
.diag-actions-col {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex-shrink: 0;
}
.diag-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
}

body.light .diag-row { background: #e0e5f0; }
body.light .diag-url { color: #0a8a3f; }
body.light .diag-note { color: #6a7290; }

/* ---- Предупреждение о сети ---- */
.network-warning {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: linear-gradient(90deg, #3d1a00, #4a2a10);
  border: 2px solid #e67e22;
  border-radius: 14px;
  margin-bottom: 16px;
  flex-wrap: wrap;
  animation: warn-pulse 2s infinite;
}
@keyframes warn-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(230, 126, 34, .5); }
  50%      { box-shadow: 0 0 0 8px rgba(230, 126, 34, 0); }
}
.warning-text {
  color: #f5c06b;
  flex: 1;
  font-size: 14px;
}
.btn-warning {
  padding: 10px 16px;
  border: none;
  border-radius: 10px;
  background: #e67e22;
  color: #1a1d29;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
}
.btn-warning:hover { filter: brightness(1.15); }
.btn-warning-alt {
  padding: 10px 16px;
  border: none;
  border-radius: 10px;
  background: transparent;
  color: #f5c06b;
  border: 1px solid #e67e22;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
}
.btn-warning-alt:hover { background: rgba(230, 126, 34, .15); }

body.light .network-warning { background: #fff3d6; border-color: #d68910; }
body.light .warning-text { color: #8a5a00; }
body.light .btn-warning-alt { color: #8a5a00; }

/* ---- Панель доступов в панели учителя ---- */
.access-bar {
  background: #1a1f38;
  padding: 12px 16px;
  border-radius: 12px;
  margin-bottom: 12px;
  border-left: 4px solid #7d9dff;
}
.access-item {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 13px;
}
.access-label { color: #b19dff; font-weight: 600; }
.access-url {
  font-family: Consolas, monospace;
  font-size: 12px;
  color: #eaeaf0;
  word-break: break-all;
  flex: 1;
}
.btn-mini {
  background: #2a2f4a;
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 4px 8px;
  font-size: 12px;
  cursor: pointer;
  font-family: inherit;
}
.btn-mini:hover { background: #3a4060; }
body.light .access-bar { background: #e0e5f0; }
body.light .access-url { color: #1a1d29; }

/* ---- Квиз-билдер в панели учителя ---- */
.quiz-builder {
  background: #1a1f38;
  padding: 14px 18px;
  border-radius: 14px;
  margin-bottom: 16px;
  border-left: 4px solid #f39c12;
}
.quiz-builder h3 { margin: 0 0 12px; font-size: 15px; color: #f5c06b; }
.quiz-row { display: flex; gap: 10px; margin-bottom: 10px; align-items: center; flex-wrap: wrap; }
.quiz-input {
  flex: 1;
  min-width: 150px;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid #2a2f4a;
  background: #0f1220;
  color: #eaeaf0;
  font-size: 14px;
  font-family: inherit;
}
body.light .quiz-builder { background: #e0e5f0; }
body.light .quiz-input { background: #fff; color: #1a1d29; border-color: #d0d5e0; }

/* ---- Гистограмма ответов квиза ---- */
.quiz-results {
  background: #1a1f38;
  padding: 14px 18px;
  border-radius: 14px;
  margin: 12px 0;
}
.quiz-results h3 { margin: 0 0 12px; font-size: 15px; }
.quiz-bars { display: flex; flex-direction: column; gap: 8px; }
.quiz-bar-row {
  display: grid;
  grid-template-columns: 28px 1fr 120px 36px;
  gap: 10px;
  align-items: center;
  font-size: 13px;
  padding: 6px 8px;
  border-radius: 8px;
}
.quiz-bar-row.correct { background: rgba(46, 204, 113, 0.15); }
.quiz-bar-letter {
  font-weight: 800;
  color: #f5c06b;
  font-size: 15px;
}
.quiz-bar-text { color: #eaeaf0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.quiz-bar-track { height: 12px; background: #0f1220; border-radius: 6px; overflow: hidden; }
.quiz-bar-fill { display: block; height: 100%; background: linear-gradient(90deg, #f39c12, #f5c06b); transition: width .4s; }
.quiz-bar-row.correct .quiz-bar-fill { background: linear-gradient(90deg, #2ecc71, #7dffb0); }
.quiz-bar-count { text-align: right; font-weight: 700; font-family: monospace; }
body.light .quiz-results { background: #e0e5f0; }
body.light .quiz-bar-text { color: #1a1d29; }
body.light .quiz-bar-track { background: #c8cee0; }

/* ---- Квиз у ученика ---- */
.quiz-block { width: min(480px, 92vw); margin: 20px 0; }
.quiz-options { display: flex; flex-direction: column; gap: 12px; }
.quiz-option {
  padding: 20px;
  font-size: 17px;
  font-weight: 700;
  border: 3px solid #3b6cff;
  border-radius: 16px;
  background: #1a1f38;
  color: #eaeaf0;
  cursor: pointer;
  transition: transform .12s, background .15s, border-color .15s;
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: inherit;
}
.quiz-option:hover { background: #252a48; transform: scale(1.02); }
.quiz-option:active { transform: scale(0.98); }
.quiz-option.chosen {
  background: #3b6cff;
  color: #fff;
  border-color: #7d9dff;
  animation: pop-selected .4s;
}
.quiz-opt-letter {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #3b6cff;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
  flex-shrink: 0;
}
.quiz-option.chosen .quiz-opt-letter {
  background: #fff;
  color: #3b6cff;
}
.quiz-opt-text { text-align: left; }
.quiz-feedback {
  text-align: center;
  font-size: 20px;
  font-weight: 800;
  margin-top: 14px;
  min-height: 28px;
}
.quiz-feedback.correct { color: #2ecc71; }
.quiz-feedback.wrong { color: #e74c3c; }
body.light .quiz-option { background: #fff; color: #1a1d29; border-color: #d0d5e0; }
body.light .quiz-option:hover { background: #eef1ff; }
body.light .quiz-option.chosen { background: #3b6cff; color: #fff; }

/* ---- Голосовые ответы ---- */
.voice-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  background: #2a2f4a;
  padding: 8px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 13px;
  user-select: none;
}
.voice-toggle input { accent-color: #e74c3c; cursor: pointer; width: 16px; height: 16px; }
body.light .voice-toggle { background: #e0e5f0; color: #1a1d29; }

.voice-block {
  margin-top: 16px;
  padding: 14px;
  border: 1px dashed #4a5070;
  border-radius: 12px;
  background: rgba(26, 31, 56, 0.5);
}
.voice-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 8px;
}
.btn-voice {
  padding: 12px 20px;
  border: 2px solid #e74c3c;
  border-radius: 12px;
  background: transparent;
  color: #e74c3c;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: background .15s;
}
.btn-voice:hover { background: rgba(231, 76, 60, 0.15); }
.btn-voice.recording {
  background: #e74c3c;
  color: #fff;
  animation: pulse-border 1.2s infinite;
}
.btn-voice-send {
  padding: 12px 20px;
  border: none;
  border-radius: 12px;
  background: #2ecc71;
  color: #06210f;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
}
.btn-voice-send:hover { filter: brightness(1.1); }
.voice-timer {
  font-family: Consolas, monospace;
  font-size: 16px;
  font-weight: 700;
  color: #e74c3c;
  min-width: 48px;
}
.voice-preview {
  height: 38px;
  border-radius: 10px;
}
body.light .voice-block { background: rgba(224, 229, 240, 0.5); border-color: #b0b8d0; }

/* Аудио в карточке учителя */
.card-audio {
  width: 100%;
  height: 34px;
  margin-top: 6px;
  border-radius: 8px;
}
/* ============================================================ */
/* ==== НОВЫЙ ДИЗАЙН ПАНЕЛИ УЧИТЕЛЯ (редизайн v3.1) ========== */
/* ============================================================ */

/* ---------- Верхняя панель ---------- */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 22px;
  background: #131832;
  border-bottom: 1px solid #2a2f4a;
  margin: -24px -24px 20px -24px;
  gap: 16px;
  flex-wrap: wrap;
}
.topbar-left { display: flex; align-items: center; gap: 12px; }
.topbar-logo {
  font-size: 28px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #1e1a38;
  border-radius: 12px;
}
.topbar-title { font-size: 16px; font-weight: 800; }
.topbar-sub { font-size: 11px; color: #8a92b0; }
.topbar-right { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

.code-pill {
  background: #1a1f38;
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 13px;
  color: #9aa0b4;
  display: flex;
  align-items: center;
  gap: 6px;
  border: 1px solid #2a2f4a;
}
.code-pill b {
  color: #7dffb0;
  font-size: 16px;
  letter-spacing: 2px;
  font-family: Consolas, monospace;
}
.pill-copy {
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 13px;
  padding: 2px 4px;
  border-radius: 6px;
  color: #7d9dff;
}
.pill-copy:hover { background: #252a48; }

.icon-btn {
  background: #1a1f38;
  border: 1px solid #2a2f4a;
  border-radius: 10px;
  width: 42px;
  height: 42px;
  font-size: 18px;
  cursor: pointer;
  transition: background .15s, transform .1s;
  color: #eaeaf0;
}
.icon-btn:hover { background: #252a48; }
.icon-btn:active { transform: scale(0.95); }

/* ---------- Контейнер ---------- */
.container { max-width: 1100px; margin: 0 auto; }

/* ---------- Поле вопроса ---------- */
.ask-main {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.ask-main input {
  flex: 1;
  min-width: 200px;
  padding: 16px 20px;
  border-radius: 14px;
  border: 2px solid #2a2f4a;
  font-size: 16px;
  background: #1a1f38;
  color: #eaeaf0;
  font-family: inherit;
  transition: border-color .15s;
}
.ask-main input:focus {
  outline: none;
  border-color: #3b6cff;
}
.btn-primary {
  padding: 16px 28px;
  border: none;
  border-radius: 14px;
  background: linear-gradient(135deg, #3b6cff, #5f4bff);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  box-shadow: 0 4px 14px rgba(59, 108, 255, 0.35);
  transition: filter .15s, transform .1s;
}
.btn-primary:hover { filter: brightness(1.1); }
.btn-primary:active { transform: scale(0.98); }

/* ---------- Текущий вопрос ---------- */
.current-q {
  font-size: 18px;
  margin: 12px 0;
  padding: 12px 18px;
  background: #1a1f38;
  border-radius: 12px;
  border-left: 4px solid #3b6cff;
  min-height: 20px;
  font-weight: 600;
}

/* ---------- Легенда ---------- */
.legend-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 14px 0 8px;
  flex-wrap: wrap;
  font-size: 14px;
  padding: 10px 16px;
  background: #131832;
  border-radius: 12px;
}
.legend-item { display: inline-flex; align-items: center; gap: 6px; }
.legend-bar .dot { margin-left: 0; }
.counter { margin-left: auto; font-family: Consolas, monospace; font-size: 16px; font-weight: 700; }

/* ---------- Присутствие компактно ---------- */
.presence-compact {
  display: flex;
  gap: 18px;
  font-size: 13px;
  color: #9aa0b4;
  margin-bottom: 14px;
  padding: 0 6px;
}
.presence-compact b { color: #eaeaf0; font-size: 15px; }

/* ---------- Быстрые действия ---------- */
.quick-actions {
  display: flex;
  gap: 8px;
  margin: 16px 0;
  flex-wrap: wrap;
}
.btn-quick {
  padding: 12px 18px;
  border: none;
  border-radius: 12px;
  background: #f39c12;
  color: #1a1d29;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
  transition: filter .15s, transform .1s;
}
.btn-quick:hover { filter: brightness(1.1); }
.btn-quick:active { transform: scale(0.98); }
.btn-quick-alt { background: #6c4a12; color: #ffd88a; }
.btn-quick-ghost { background: #2a2f4a; color: #eaeaf0; }
.btn-quick-finish {
  background: linear-gradient(135deg, #7d3cff, #3b6cff);
  color: #fff;
  margin-left: auto;
}

/* ---------- Раскладушки ---------- */
.fold {
  background: #131832;
  border: 1px solid #2a2f4a;
  border-radius: 14px;
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color .2s;
}
.fold[open] { border-color: #3b6cff; }
.fold summary {
  padding: 16px 20px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 700;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  user-select: none;
  transition: background .15s;
}
.fold summary:hover { background: #1a1f38; }
.fold summary::-webkit-details-marker { display: none; }
.fold summary::before {
  content: '▶';
  font-size: 11px;
  color: #7d9dff;
  transition: transform .2s;
  display: inline-block;
}
.fold[open] summary::before { transform: rotate(90deg); }
.fold-title { flex: 1; }
.fold-hint { font-size: 12px; color: #8a92b0; font-weight: 400; }
.fold-badge {
  background: #e74c3c;
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 10px;
  min-width: 20px;
  text-align: center;
}
.fold-content {
  padding: 6px 20px 20px;
  border-top: 1px solid #2a2f4a;
}

.fold-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  flex-wrap: wrap;
  border-bottom: 1px solid rgba(42, 47, 74, 0.5);
}
.fold-row:last-child { border-bottom: none; }
.fold-label { font-size: 14px; color: #9aa0b4; font-weight: 600; min-width: 130px; }

/* ---------- Режимы (кнопки) ---------- */
.mode-tabs { display: flex; gap: 6px; flex-wrap: wrap; }
.mode-btn {
  padding: 8px 14px;
  border: 1px solid #2a2f4a;
  border-radius: 10px;
  background: #0f1220;
  color: #eaeaf0;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  transition: all .15s;
}
.mode-btn:hover { background: #252a48; }
.mode-btn.active {
  background: #3b6cff;
  border-color: #5580ff;
  color: #fff;
  box-shadow: 0 0 12px rgba(59, 108, 255, 0.4);
}

/* ---------- Переключатели (switch) ---------- */
.switch {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}
.switch input { display: none; }
.switch-slider {
  width: 44px;
  height: 24px;
  background: #2a2f4a;
  border-radius: 12px;
  position: relative;
  transition: background .2s;
  flex-shrink: 0;
}
.switch-slider::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  background: #fff;
  border-radius: 50%;
  top: 3px;
  left: 3px;
  transition: left .2s;
}
.switch input:checked + .switch-slider { background: #2ecc71; }
.switch input:checked + .switch-slider::after { left: 23px; }
.switch-text { font-size: 14px; color: #cfd3e3; }

/* ---------- Ключевые слова ---------- */
.keywords-input {
  flex: 1;
  min-width: 200px;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid #2a2f4a;
  background: #0f1220;
  color: #eaeaf0;
  font-size: 14px;
  font-family: inherit;
}
.btn-secondary {
  padding: 10px 16px;
  border: 1px solid #3b6cff;
  border-radius: 10px;
  background: transparent;
  color: #7d9dff;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  transition: all .15s;
}
.btn-secondary:hover { background: rgba(59, 108, 255, 0.15); }

/* ---------- Модалка настроек ---------- */
.modal-settings { max-width: 640px; }
.modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
.modal-head h2 { margin: 0; }

.settings-section {
  padding: 18px 0;
  border-bottom: 1px solid #2a2f4a;
}
.settings-section:last-child { border-bottom: none; padding-bottom: 0; }
.settings-section h3 {
  margin: 0 0 14px;
  font-size: 14px;
  color: #9aa0b4;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.access-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px;
  background: #0f1220;
  border-radius: 12px;
  margin-bottom: 10px;
}
.access-icon {
  font-size: 22px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #1a1f38;
  border-radius: 10px;
  flex-shrink: 0;
}
.access-info { flex: 1; min-width: 0; }
.access-name { font-weight: 700; font-size: 14px; margin-bottom: 2px; }
.access-desc { font-size: 11px; color: #8a92b0; margin-bottom: 6px; }
.access-url {
  font-family: Consolas, monospace;
  font-size: 12px;
  color: #b19dff;
  word-break: break-all;
  background: #0a0d1a;
  padding: 6px 8px;
  border-radius: 6px;
}
.access-actions { display: flex; gap: 6px; flex-shrink: 0; }
.access-stat {
  padding: 10px 12px;
  background: #131832;
  border-radius: 10px;
  font-size: 13px;
  color: #9aa0b4;
  margin-top: 8px;
}
.access-stat b { color: #b19dff; font-size: 15px; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: #1a1f38;
  color: #eaeaf0;
  padding: 14px 24px;
  border-radius: 12px;
  border: 2px solid #3b6cff;
  font-weight: 600;
  font-size: 14px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  transition: transform .3s;
  z-index: 3000;
  pointer-events: none;
  max-width: 90vw;
  text-align: center;
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* ---------- Светлая тема для нового дизайна ---------- */
body.light .topbar { background: #fff; border-bottom-color: #d0d5e0; }
body.light .topbar-logo { background: #e0e5f0; }
body.light .code-pill { background: #fff; border-color: #d0d5e0; }
body.light .icon-btn { background: #fff; border-color: #d0d5e0; color: #1a1d29; }
body.light .icon-btn:hover { background: #e0e5f0; }
body.light .ask-main input { background: #fff; color: #1a1d29; border-color: #d0d5e0; }
body.light .current-q { background: #e0e5f0; color: #1a1d29; }
body.light .legend-bar { background: #fff; }
body.light .presence-compact { color: #6a7290; }
body.light .presence-compact b { color: #1a1d29; }
body.light .fold { background: #fff; border-color: #d0d5e0; }
body.light .fold summary:hover { background: #e0e5f0; }
body.light .fold-content { border-top-color: #d0d5e0; }
body.light .fold-row { border-bottom-color: #e0e5f0; }
body.light .fold-label { color: #6a7290; }
body.light .mode-btn { background: #fff; color: #1a1d29; border-color: #d0d5e0; }
body.light .mode-btn:hover { background: #e0e5f0; }
body.light .switch-slider { background: #d0d5e0; }
body.light .switch-text { color: #4a5070; }
body.light .keywords-input { background: #fff; color: #1a1d29; border-color: #d0d5e0; }
body.light .btn-quick-ghost { background: #e0e5f0; color: #1a1d29; }
body.light .modal-settings .access-row { background: #e0e5f0; }
body.light .modal-settings .access-icon { background: #fff; }
body.light .modal-settings .access-url { background: #fff; }
body.light .modal-settings .access-stat { background: #e0e5f0; }
body.light .modal-settings .access-desc { color: #6a7290; }
body.light .toast { background: #fff; color: #1a1d29; }

/* ============ ПАНЕЛЬ МАТЕРИАЛА УРОКА ============ */
.material-panel {
  background: linear-gradient(135deg, rgba(123, 60, 255, 0.15), rgba(59, 108, 255, 0.08));
  border: 2px solid rgba(123, 60, 255, 0.5);
  border-radius: 16px;
  padding: 16px 20px;
  margin-bottom: 16px;
}
.mp-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}
.mp-icon { font-size: 28px; }
.mp-info { flex: 1; min-width: 0; }
.mp-title { font-size: 16px; font-weight: 800; margin-bottom: 2px; color: #b19dff; }
.mp-sub { font-size: 12px; color: #9aa0b4; }

.mp-nav {
  display: flex;
  align-items: center;
  gap: 10px;
}
.mp-nav-btn {
  padding: 8px 14px;
  background: #1a1f38;
  border: 1px solid #3b6cff;
  color: #eaeaf0;
  border-radius: 8px;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  transition: background .15s;
}
.mp-nav-btn:hover:not(:disabled) { background: #252a48; }
.mp-nav-btn:disabled { opacity: 0.4; cursor: default; }
.mp-counter {
  font-family: Consolas, monospace;
  font-size: 14px;
  font-weight: 700;
  color: #7dffb0;
  min-width: 60px;
  text-align: center;
}

.mp-current {
  background: rgba(15, 18, 32, 0.6);
  border-radius: 12px;
  padding: 14px 16px;
}
.mp-current-label {
  font-size: 11px;
  color: #9aa0b4;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.mp-current-text {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 6px;
  line-height: 1.4;
}
.mp-current-meta {
  font-size: 12px;
  color: #9aa0b4;
  margin-bottom: 12px;
}
.mp-ask-btn {
  padding: 12px 20px;
  background: linear-gradient(135deg, #7b3cff, #3b6cff);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
  transition: filter .15s;
  width: 100%;
}
.mp-ask-btn:hover { filter: brightness(1.15); }

body.light .material-panel {
  background: linear-gradient(135deg, rgba(123, 60, 255, 0.1), rgba(59, 108, 255, 0.05));
  border-color: rgba(123, 60, 255, 0.4);
}
body.light .mp-title { color: #5c3bbf; }
body.light .mp-current { background: #fff; }

/* ============================================================ */
/* ============ НОВЫЙ ИНТЕРФЕЙС УЧЕНИКА (v2) ================== */
/* ============================================================ */

.student-body {
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: #0f1220;
  color: #eaeaf0;
  overflow-x: hidden;
  user-select: none;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
body.student-body.light {
  background: #f4f6fb;
  color: #1a1d29;
}

/* ============ ЛОГИН ============ */
.st-login {
  max-width: 400px;
  margin: 0 auto;
  padding: 60px 24px;
  text-align: center;
}
.st-login-logo {
  font-size: 64px;
  margin-bottom: 16px;
}
.st-login-title {
  font-size: 22px;
  font-weight: 800;
  margin: 0 0 6px;
}
.st-login-sub {
  color: #8a92b0;
  font-size: 14px;
  margin: 0 0 24px;
}
.st-login-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.st-input {
  padding: 16px 20px;
  border-radius: 14px;
  border: 2px solid #2a2f4a;
  background: #1a1f38;
  color: #eaeaf0;
  font-size: 16px;
  font-family: inherit;
  text-align: center;
  transition: border-color .15s;
  width: 100%;
  box-sizing: border-box;
}
.st-input:focus {
  outline: none;
  border-color: #7b3cff;
}
.st-btn-primary {
  padding: 16px 24px;
  border: none;
  border-radius: 14px;
  background: linear-gradient(135deg, #7b3cff, #3b6cff);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: filter .15s;
}
.st-btn-primary:hover { filter: brightness(1.15); }
.st-btn-primary:active { transform: scale(0.98); }

/* ============ ЗАГОЛОВОК ============ */
.st-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  background: rgba(19, 24, 50, 0.7);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #2a2f4a;
  position: sticky;
  top: 0;
  z-index: 100;
}
body.student-body.light .st-header {
  background: rgba(255, 255, 255, 0.85);
  border-bottom-color: #d0d5e0;
}
.st-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}
.st-avatar {
  font-size: 24px;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #7b3cff, #3b6cff);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.st-name {
  font-size: 15px;
  font-weight: 700;
}
.st-icon-btn {
  width: 40px;
  height: 40px;
  background: #1a1f38;
  border: 1px solid #2a2f4a;
  border-radius: 10px;
  font-size: 18px;
  cursor: pointer;
  color: inherit;
  transition: background .15s;
}
.st-icon-btn:hover { background: #252a48; }
body.student-body.light .st-icon-btn {
  background: #fff;
  border-color: #d0d5e0;
}

/* ============ ЭКРАНЫ ============ */
.st-screen {
  display: none;
  flex: 1;
  padding: 24px 18px 100px 18px;
  max-width: 600px;
  margin: 0 auto;
  width: 100%;
  box-sizing: border-box;
  animation: fadeIn .35s;
}
.st-screen.active { display: flex; flex-direction: column; }

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

/* ============ ЭКРАН 1: ОЖИДАНИЕ ============ */
.st-screen-waiting {
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 20px;
}
.st-waiting-icon {
  font-size: 80px;
  opacity: 0.6;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
}
.st-waiting-title {
  font-size: 22px;
  font-weight: 800;
}
.st-waiting-sub {
  font-size: 14px;
  color: #8a92b0;
  max-width: 320px;
  line-height: 1.5;
}

.st-big-hand {
  margin-top: 20px;
  padding: 20px 40px;
  font-size: 18px;
  font-weight: 700;
  border: 3px solid #f1c40f;
  border-radius: 16px;
  background: transparent;
  color: #f1c40f;
  cursor: pointer;
  font-family: inherit;
  transition: all .15s;
  display: flex;
  align-items: center;
  gap: 12px;
}
.st-big-hand:hover { background: rgba(241, 196, 15, 0.1); }
.st-big-hand.raised {
  background: #f1c40f;
  color: #2a2100;
  animation: pulse-border 1.2s infinite;
}
.st-hand-icon { font-size: 24px; }

/* ============ ЭКРАН 2: ВОПРОС ============ */
.st-screen-question {
  gap: 16px;
}
.st-question-header {
  background: #131832;
  padding: 20px 22px;
  border-radius: 16px;
  border-left: 4px solid #7b3cff;
}
body.student-body.light .st-question-header { background: #fff; }
.st-question-label {
  font-size: 11px;
  color: #9aa0b4;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
  font-weight: 700;
}
.st-question-text {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  word-wrap: break-word;
}

.st-timer {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: center;
  padding: 10px 32px;
  border-radius: 50px;
  background: #1a1f38;
  border: 2px solid #3b6cff;
  font-size: 32px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  min-width: 100px;
  transition: all .3s;
}
.st-timer.warning { border-color: #f1c40f; color: #f1c40f; }
.st-timer.expired { border-color: #e74c3c; background: #3a1212; color: #e74c3c; }
body.student-body.light .st-timer { background: #fff; color: #1a1d29; }

/* Ответы */
.st-answers {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.st-answer {
  padding: 24px 20px;
  border-radius: 18px;
  border: none;
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  cursor: pointer;
  font-family: inherit;
  display: flex;
  align-items: center;
  gap: 16px;
  position: relative;
  transition: transform .12s, opacity .25s, filter .25s, box-shadow .25s;
}
.st-answer:active { transform: scale(0.98); }
.st-answer:disabled { opacity: 0.4; cursor: default; }
.st-answer-emoji { font-size: 32px; }
.st-answer-text { flex: 1; text-align: left; }
.st-answer-check {
  font-size: 28px;
  font-weight: 900;
  opacity: 0;
  transform: scale(0.5);
  transition: opacity .2s, transform .3s;
}
.st-answer-green { background: linear-gradient(135deg, #2ecc71, #27ae60); color: #06210f; }
.st-answer-yellow { background: linear-gradient(135deg, #f1c40f, #d4a010); color: #2a2100; }
.st-answer-red { background: linear-gradient(135deg, #e74c3c, #c0392b); }

.st-answer.selected {
  box-shadow: 0 0 0 4px currentColor inset, 0 8px 28px rgba(0,0,0,0.4);
  transform: scale(1.03);
  animation: pop .4s;
}
.st-answer.selected .st-answer-check {
  opacity: 1;
  transform: scale(1);
}
@keyframes pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.08); }
  100% { transform: scale(1.03); }
}
.st-answer.not-selected {
  opacity: 0.4;
  filter: grayscale(0.6);
  transform: scale(0.97);
}

/* Текстовый блок */
.st-text-block {
  background: #131832;
  padding: 20px 22px;
  border-radius: 16px;
}
body.student-body.light .st-text-block { background: #fff; }
.st-hint {
  font-size: 12px;
  color: #9aa0b4;
  margin: 0 0 8px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.st-hint-small {
  font-size: 12px;
  color: #8a92b0;
  margin: 6px 0 0;
}
.st-textarea {
  width: 100%;
  min-height: 120px;
  padding: 14px;
  border-radius: 12px;
  border: 2px solid #2a2f4a;
  background: #0f1220;
  color: #eaeaf0;
  font-size: 16px;
  font-family: inherit;
  resize: vertical;
  box-sizing: border-box;
}
.st-textarea:focus { outline: none; border-color: #7b3cff; }
.st-textarea.sent {
  border-color: #2ecc71;
  background: rgba(46, 204, 113, 0.08);
  animation: sent-pulse .6s;
}
@keyframes sent-pulse {
  0% { box-shadow: 0 0 0 0 rgba(46, 204, 113, 0.5); }
  100% { box-shadow: 0 0 0 14px rgba(46, 204, 113, 0); }
}
body.student-body.light .st-textarea {
  background: #fff;
  color: #1a1d29;
  border-color: #d0d5e0;
}
.st-text-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
}
.st-char-count {
  font-size: 12px;
  color: #6a7290;
  font-family: Consolas, monospace;
}
.st-btn-send {
  padding: 12px 24px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(135deg, #7b3cff, #3b6cff);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: filter .15s;
}
.st-btn-send:hover { filter: brightness(1.15); }

/* Голос */
.st-voice-block {
  margin-top: 16px;
  padding: 14px;
  border: 2px dashed #4a5070;
  border-radius: 12px;
}
.st-voice-controls {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 8px;
}
.st-btn-voice {
  padding: 12px 20px;
  border: 2px solid #e74c3c;
  border-radius: 12px;
  background: transparent;
  color: #e74c3c;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
}
.st-btn-voice.recording {
  background: #e74c3c;
  color: #fff;
  animation: pulse-border 1.2s infinite;
}
.st-voice-timer {
  font-family: Consolas, monospace;
  font-size: 16px;
  font-weight: 700;
  color: #e74c3c;
}

/* Квиз */
.st-quiz-block {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.st-quiz-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.st-quiz-option {
  padding: 20px 22px;
  border: 3px solid #3b6cff;
  border-radius: 16px;
  background: #1a1f38;
  color: #eaeaf0;
  font-size: 17px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all .15s;
  text-align: left;
}
.st-quiz-option:hover {
  background: #252a48;
  transform: scale(1.02);
}
.st-quiz-option.chosen {
  background: linear-gradient(135deg, #7b3cff, #3b6cff);
  color: #fff;
  border-color: #b19dff;
  transform: scale(1.03);
}
.st-quiz-letter {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #3b6cff;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
  flex-shrink: 0;
}
.st-quiz-option.chosen .st-quiz-letter {
  background: #fff;
  color: #7b3cff;
}
.st-quiz-feedback {
  text-align: center;
  font-size: 20px;
  font-weight: 800;
  margin-top: 8px;
  min-height: 26px;
}
.st-quiz-feedback.correct { color: #2ecc71; }
.st-quiz-feedback.wrong { color: #e74c3c; }
body.student-body.light .st-quiz-option {
  background: #fff;
  color: #1a1d29;
  border-color: #d0d5e0;
}

/* Баннер "ты отвечаешь" */
.st-picked-banner {
  margin-top: 16px;
  padding: 16px 22px;
  background: linear-gradient(135deg, #f39c12, #e67e22);
  border-radius: 14px;
  font-size: 17px;
  font-weight: 800;
  color: #1a1d29;
  text-align: center;
  animation: pulse-border 1.6s infinite;
}

/* ============ ЭКРАН 3: ОТВЕТ ОТПРАВЛЕН ============ */
.st-screen-answered {
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 14px;
}
.st-answered-icon {
  font-size: 100px;
  animation: bounce-in .6s;
}
@keyframes bounce-in {
  0% { transform: scale(0.3); opacity: 0; }
  60% { transform: scale(1.15); }
  100% { transform: scale(1); opacity: 1; }
}
.st-answered-title {
  font-size: 26px;
  font-weight: 800;
  color: #2ecc71;
}
.st-answered-sub {
  font-size: 16px;
  color: #9aa0b4;
}

/* ============ НИЖНЯЯ ПАНЕЛЬ ============ */
.st-bottom-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 70px;
  background: rgba(19, 24, 50, 0.95);
  backdrop-filter: blur(15px);
  border-top: 1px solid #2a2f4a;
  display: flex;
  z-index: 500;
  padding-bottom: env(safe-area-inset-bottom, 0);
}
body.student-body.light .st-bottom-bar {
  background: rgba(255, 255, 255, 0.95);
  border-top-color: #d0d5e0;
}
.st-nav-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: #8a92b0;
  font-family: inherit;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 8px;
  transition: color .15s, background .15s;
  font-size: 12px;
  font-weight: 600;
}
.st-nav-btn:hover { color: #eaeaf0; }
.st-nav-btn.active { color: #b19dff; }
.st-nav-icon {
  font-size: 22px;
  line-height: 1;
}
.st-nav-label { font-size: 11px; }
body.student-body.light .st-nav-btn { color: #6a7290; }
body.student-body.light .st-nav-btn.active { color: #7b3cff; }

/* ============ ПАНЕЛИ СНИЗУ ============ */
.st-panel-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s;
  z-index: 600;
}
.st-panel-backdrop.show {
  opacity: 1;
  pointer-events: auto;
}
.st-panel {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: #131832;
  border-top-left-radius: 24px;
  border-top-right-radius: 24px;
  padding: 20px 24px 90px;
  z-index: 700;
  transform: translateY(100%);
  transition: transform .3s cubic-bezier(0.4, 0, 0.2, 1);
  max-width: 600px;
  margin: 0 auto;
  max-height: 80vh;
  overflow-y: auto;
}
.st-panel.open { transform: translateY(0); }
body.student-body.light .st-panel { background: #fff; }

.st-panel-handle {
  width: 40px;
  height: 4px;
  background: #4a5070;
  border-radius: 2px;
  margin: 0 auto 16px;
}
.st-panel-title {
  font-size: 17px;
  font-weight: 800;
  margin: 0 0 6px;
}

.st-reactions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-top: 16px;
}
.st-reaction-btn {
  font-size: 32px;
  padding: 16px 8px;
  border-radius: 14px;
  background: #1a1f38;
  border: 1px solid #2a2f4a;
  cursor: pointer;
  transition: transform .12s, background .15s;
}
.st-reaction-btn:hover { background: #252a48; transform: scale(1.08); }
.st-reaction-btn.flash {
  background: linear-gradient(135deg, #7b3cff, #3b6cff);
  transform: scale(1.15);
}
body.student-body.light .st-reaction-btn { background: #f4f6fb; border-color: #d0d5e0; }

/* ============ TOAST ============ */
.st-toast {
  position: fixed;
  bottom: 90px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #131832;
  border: 2px solid #3b6cff;
  padding: 14px 24px;
  border-radius: 14px;
  font-weight: 700;
  font-size: 14px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  opacity: 0;
  transition: opacity .3s, transform .3s;
  z-index: 1000;
  pointer-events: none;
  max-width: 90vw;
  text-align: center;
}
.st-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.st-toast.success { border-color: #2ecc71; color: #7dffb0; }
body.student-body.light .st-toast { background: #fff; }

/* ============ БЛОК КЛАССА ============ */
.class-panel {
  background: #1a1f38;
  border-radius: 14px;
  margin-bottom: 16px;
  border-left: 4px solid #7dffb0;
  overflow: hidden;
}
.cp-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  cursor: pointer;
  user-select: none;
  transition: background .15s;
}
.cp-header:hover { background: #252a48; }
.cp-icon { font-size: 22px; }
.cp-title {
  font-size: 15px;
  font-weight: 700;
  color: #7dffb0;
}
.cp-stats {
  font-size: 13px;
  color: #9aa0b4;
  margin-left: auto;
}
.cp-toggle {
  font-size: 12px;
  color: #9aa0b4;
  transition: transform .2s;
}

.cp-body {
  padding: 0 18px 18px;
  border-top: 1px solid #2a2f4a;
}
.cp-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 14px;
}
.cp-col-title {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}
.cp-col-present { color: #7dffb0; }
.cp-col-absent { color: #f5c06b; }

.cp-list {
  max-height: 240px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.cp-student {
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 13px;
  background: #0f1220;
}
.cp-student.present {
  color: #7dffb0;
  border-left: 3px solid #2ecc71;
}
.cp-student.absent {
  color: #9aa0b4;
  border-left: 3px solid #f39c12;
  opacity: 0.7;
}
.cp-empty {
  padding: 12px;
  text-align: center;
  font-size: 12px;
  color: #6a7290;
  font-style: italic;
}

/* Метки в карточках */
.in-class-badge, .not-in-class-badge {
  font-size: 12px;
  padding: 1px 4px;
  border-radius: 4px;
  flex-shrink: 0;
}
.in-class-badge {
  background: rgba(46, 204, 113, 0.2);
}
.not-in-class-badge {
  background: rgba(243, 156, 18, 0.2);
}

.card-student.not-from-class {
  border: 2px dashed rgba(243, 156, 18, 0.6);
}

body.light .class-panel { background: #e0e5f0; }
body.light .cp-title { color: #0a8a3f; }
body.light .cp-stats { color: #6a7290; }
body.light .cp-student { background: #fff; }
body.light .cp-student.present { color: #0a8a3f; }
body.light .cp-student.absent { color: #8a5a00; }

/* ============ БОКОВАЯ ПАНЕЛЬ ТЕОРИИ ============ */
.theory-drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s;
  z-index: 900;
}
.theory-drawer-backdrop.show {
  opacity: 1;
  pointer-events: auto;
}

.theory-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 480px;
  max-width: 90vw;
  background: #131832;
  border-left: 1px solid #2a2f4a;
  z-index: 1000;
  transform: translateX(100%);
  transition: transform .3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
}
.theory-drawer.open {
  transform: translateX(0);
}

.theory-drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 22px;
  border-bottom: 1px solid #2a2f4a;
  flex-shrink: 0;
}
.theory-drawer-header h2 {
  font-size: 18px;
  font-weight: 800;
  margin: 0;
  color: #b19dff;
}

.theory-drawer-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.theory-drawer-item {
  background: #0f1220;
  padding: 14px 16px;
  border-radius: 12px;
  border-left: 3px solid #7b3cff;
}
.theory-drawer-title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
  color: #eaeaf0;
}

/* Переиспользуем классы теории */
.theory-drawer .theory-content {
  font-size: 14px;
  line-height: 1.6;
  color: #cfd3e3;
  word-wrap: break-word;
}
.theory-drawer .theory-content h1 { font-size: 18px; margin: 10px 0 6px; }
.theory-drawer .theory-content h2 { font-size: 16px; margin: 10px 0 6px; }
.theory-drawer .theory-content h3 { font-size: 14px; margin: 8px 0 4px; }
.theory-drawer .theory-content strong { color: #b19dff; font-weight: 800; }
.theory-drawer .theory-content em { color: #7d9dff; }
.theory-drawer .theory-content code {
  background: #1a1f38;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: Consolas, monospace;
  color: #7dffb0;
  font-size: 12px;
}
.theory-drawer .theory-content ul, .theory-drawer .theory-content ol {
  margin: 8px 0;
  padding-left: 22px;
}
.theory-drawer .theory-content li { margin: 4px 0; }
.theory-drawer .theory-content p { margin: 6px 0; }

.theory-drawer .theory-image-preview {
  max-width: 100%;
  border-radius: 10px;
  display: block;
  margin-top: 6px;
  cursor: pointer;
  transition: transform .15s;
}
.theory-drawer .theory-image-preview:hover { transform: scale(1.02); }

.theory-drawer .theory-file-info {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: #1a1f38;
  border-radius: 10px;
  margin-top: 4px;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  transition: background .15s;
}
.theory-drawer .theory-file-info:hover { background: #252a48; }
.theory-drawer .theory-file-icon { font-size: 22px; }
.theory-drawer .theory-file-name { font-size: 13px; font-weight: 600; word-break: break-all; color: #eaeaf0; }
.theory-drawer .theory-file-size { font-size: 11px; color: #9aa0b4; }

.theory-drawer .theory-link-url {
  font-size: 13px;
  color: #7d9dff;
  word-break: break-all;
  display: block;
  margin-top: 4px;
  cursor: pointer;
  text-decoration: none;
}
.theory-drawer .theory-link-url:hover { text-decoration: underline; }

body.light .theory-drawer { background: #fff; border-left-color: #d0d5e0; }
body.light .theory-drawer-header { border-bottom-color: #d0d5e0; }
body.light .theory-drawer-header h2 { color: #5c3bbf; }
body.light .theory-drawer-item { background: #f4f6fb; }
body.light .theory-drawer-title { color: #1a1d29; }
body.light .theory-drawer .theory-content { color: #4a5070; }
body.light .theory-drawer .theory-content strong { color: #5c3bbf; }
body.light .theory-drawer .theory-file-info { background: #e0e5f0; }
body.light .theory-drawer .theory-file-name { color: #1a1d29; }

/* ============================================ */
/* ============ ТЕОРИЯ У УЧЕНИКА ============= */
/* ============================================ */

/* Кнопки в шапке — правая группа */
.st-header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}
.st-theory-btn {
  color: #b19dff;
  font-size: 20px;
}
.st-theory-btn:active { transform: scale(0.9); }

/* Панель теории — шире и выше */
.st-panel-theory {
  max-height: 85vh;
}

.st-theory-content {
  max-height: 65vh;
  overflow-y: auto;
  padding-right: 6px;
}

.st-theory-item {
  background: #0f1220;
  padding: 14px 16px;
  border-radius: 12px;
  margin-bottom: 12px;
  border-left: 3px solid #7b3cff;
}
body.student-body.light .st-theory-item {
  background: #f4f6fb;
  border-left-color: #7b3cff;
}

.st-theory-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
  color: #b19dff;
  word-break: break-word;
}
.st-theory-title:empty { display: none; }

/* Markdown-контент теории */
.st-theory-md {
  font-size: 14px;
  line-height: 1.6;
  color: #eaeaf0;
  word-wrap: break-word;
}
.st-theory-md h1 { font-size: 18px; margin: 10px 0 6px; font-weight: 800; }
.st-theory-md h2 { font-size: 16px; margin: 10px 0 6px; font-weight: 800; }
.st-theory-md h3 { font-size: 14px; margin: 8px 0 4px; font-weight: 800; }
.st-theory-md p { margin: 6px 0; }
.st-theory-md strong { color: #b19dff; font-weight: 800; }
.st-theory-md em { color: #7d9dff; font-style: italic; }
.st-theory-md code {
  background: #1a1f38;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: Consolas, monospace;
  color: #7dffb0;
  font-size: 12px;
}
.st-theory-md ul, .st-theory-md ol {
  margin: 8px 0;
  padding-left: 22px;
}
.st-theory-md li { margin: 4px 0; }

body.student-body.light .st-theory-md { color: #1a1d29; }
body.student-body.light .st-theory-md strong { color: #5c3bbf; }
body.student-body.light .st-theory-md code { background: #e0e5f0; color: #0a8a3f; }

/* Ссылка */
.st-theory-link {
  display: block;
  font-size: 13px;
  color: #7d9dff;
  word-break: break-all;
  text-decoration: none;
  padding: 8px 10px;
  background: #1a1f38;
  border-radius: 8px;
  margin-top: 4px;
}
.st-theory-link:hover { text-decoration: underline; }

/* Картинка */
.st-theory-image {
  max-width: 100%;
  border-radius: 10px;
  display: block;
  margin-top: 4px;
  cursor: pointer;
}

/* Файл */
.st-theory-file {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: #1a1f38;
  border-radius: 10px;
  margin-top: 6px;
  text-decoration: none;
  color: inherit;
}
.st-theory-file:hover { background: #252a48; }
.st-theory-file-icon { font-size: 22px; }
.st-theory-file-name {
  font-size: 13px;
  font-weight: 600;
  word-break: break-all;
  color: #eaeaf0;
}
.st-theory-file-size { font-size: 11px; color: #9aa0b4; }

body.student-body.light .st-theory-link { background: #e0e5f0; color: #5c3bbf; }
body.student-body.light .st-theory-file { background: #e0e5f0; }
body.student-body.light .st-theory-file-name { color: #1a1d29; }

/* ============================================ */
/* ============ БАННЕР «НОВЫЙ ВОПРОС» ========= */
/* ============================================ */
.st-new-question-banner {
  position: fixed;
  bottom: 90px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 32px);
  max-width: 500px;
  background: linear-gradient(135deg, #f39c12, #e67e22);
  color: #1a1d29;
  padding: 14px 18px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 12px 32px rgba(243, 156, 18, 0.5);
  z-index: 800;
  cursor: pointer;
  animation: nqb-slide-up .4s;
}
@keyframes nqb-slide-up {
  from { transform: translateX(-50%) translateY(100px); opacity: 0; }
  to { transform: translateX(-50%) translateY(0); opacity: 1; }
}
.st-nqb-icon {
  font-size: 28px;
  animation: nqb-shake 1.2s infinite;
}
@keyframes nqb-shake {
  0%, 100% { transform: rotate(-10deg); }
  50% { transform: rotate(10deg); }
}
.st-nqb-content { flex: 1; min-width: 0; }
.st-nqb-title { font-size: 14px; font-weight: 800; margin-bottom: 2px; }
.st-nqb-sub {
  font-size: 12px;
  color: #2a2100;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.st-nqb-btn {
  padding: 10px 16px;
  background: #fff;
  border: none;
  border-radius: 10px;
  color: #e67e22;
  font-weight: 800;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  flex-shrink: 0;
}

/* ============================================ */
/* ============ АДАПТАЦИЯ НИЖНЕЙ ПАНЕЛИ ======= */
/* ============================================ */
/* Теперь 4 кнопки вместо 3 */
.st-nav-btn {
  flex: 1;
  min-width: 0;
}
.st-nav-label {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.logo-big {
  font-size: 80px;
  margin-bottom: 12px;
  line-height: 1;
}
.sub-small {
  color: #6f7488;
  font-size: 14px;
  margin-top: -8px;
}
/* ============================================
   ВКЛАДКИ ПАНЕЛИ УЧИТЕЛЯ
   ============================================ */

.teacher-content {
  position: relative;
  z-index: 10;
  max-width: 1400px;
  margin: 0 auto;
}

.teacher-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 20px;
  background: rgba(19, 24, 50, 0.7);
  backdrop-filter: blur(10px);
  padding: 6px;
  border-radius: 14px;
  border: 1px solid #2a2f4a;
  flex-wrap: wrap;
}

.teacher-tabs .tab-btn {
  padding: 10px 18px;
  border: none;
  border-radius: 10px;
  background: transparent;
  color: #9aa0b4;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
  transition: all .15s;
  display: flex;
  align-items: center;
  gap: 8px;
}

.teacher-tabs .tab-btn:hover {
  background: rgba(255,255,255,0.05);
  color: #eaeaf0;
}

.teacher-tabs .tab-btn.active {
  background: linear-gradient(135deg, #7c5cff, #4a7dff);
  color: #fff;
  box-shadow: 0 4px 12px rgba(124, 92, 255, 0.4);
}

.tab-badge {
  background: rgba(255,255,255,0.2);
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 700;
  min-width: 20px;
  text-align: center;
}

.teacher-tabs .tab-btn.active .tab-badge {
  background: rgba(0,0,0,0.25);
}

/* Скрываем все вкладки, показываем только активную */
.teacher-tab-content {
  display: none;
}

.teacher-tab-content.active {
  display: block;
  animation: tabFadeIn .25s;
}

@keyframes tabFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.tab-title {
  margin: 0 0 16px;
  font-size: 20px;
  font-weight: 800;
}

/* Светлая тема для вкладок */
body.light .teacher-tabs {
  background: rgba(255,255,255,0.8);
  border-color: #d0d5e0;
}

body.light .teacher-tabs .tab-btn {
  color: #6a7290;
}

body.light .teacher-tabs .tab-btn:hover {
  background: rgba(0,0,0,0.05);
  color: #1a1d29;
}

body.light .teacher-tabs .tab-btn.active {
  background: linear-gradient(135deg, #7c5cff, #4a7dff);
  color: #fff;
}

/* ============================================
   ТАБЛИЦА ОЦЕНОК
   ============================================ */

.grades-toolbar {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.grades-table {
  width: 100%;
  border-collapse: collapse;
  background: #1a1f38;
  border-radius: 14px;
  overflow: hidden;
}

.grades-table th {
  text-align: left;
  padding: 14px 16px;
  font-size: 12px;
  color: #9aa0b4;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 700;
  border-bottom: 1px solid #2a2f4a;
  background: #131832;
}

.grades-table td {
  padding: 12px 16px;
  border-bottom: 1px solid #2a2f4a;
  font-size: 14px;
}

.grades-table tr:last-child td { border-bottom: none; }
.grades-table tr:hover td { background: rgba(124, 92, 255, 0.05); }

.grade-buttons {
  display: flex;
  gap: 4px;
}

.grade-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid #2a2f4a;
  background: #0f1220;
  color: #9aa0b4;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  transition: all .15s;
}

.grade-btn:hover {
  background: rgba(124, 92, 255, 0.2);
  color: #eaeaf0;
}

.grade-btn.active {
  background: linear-gradient(135deg, #7c5cff, #4a7dff);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 4px 12px rgba(124, 92, 255, 0.4);
}

.grade-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
}

.grade-badge.g5 { background: rgba(74, 222, 128, 0.2); color: #86efac; }
.grade-badge.g4 { background: rgba(250, 204, 21, 0.2); color: #fde047; }
.grade-badge.g3 { background: rgba(248, 113, 113, 0.2); color: #fca5a5; }
.grade-badge.gnone { background: rgba(154, 160, 180, 0.2); color: #9aa0b4; }

body.light .grades-table { background: #fff; }
body.light .grades-table th { background: #f4f6fb; color: #6a7290; border-bottom-color: #d0d5e0; }
body.light .grades-table td { border-bottom-color: #e0e5f0; }
body.light .grades-table tr:hover td { background: rgba(124, 92, 255, 0.08); }
body.light .grade-btn { background: #f4f6fb; border-color: #d0d5e0; }
/* ============================================
   КНОПКА "ЗАВЕРШИТЬ ВОПРОС"
   ============================================ */

.btn-finish-question {
  width: 100%;
  padding: 14px 24px;
  margin-bottom: 16px;
  border: 2px solid #7c5cff;
  border-radius: 12px;
  background: transparent;
  color: #7c5cff;
  font-size: 15px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: all .2s;
}

.btn-finish-question:hover {
  background: rgba(124, 92, 255, 0.12);
  border-color: #9d7dff;
  color: #9d7dff;
  transform: translateY(-1px);
}

.btn-finish-question:active {
  transform: translateY(0);
  background: rgba(124, 92, 255, 0.2);
}

/* Светлая тема */
body.light .btn-finish-question {
  border-color: #7c5cff;
  color: #7c5cff;
}

body.light .btn-finish-question:hover {
  background: rgba(124, 92, 255, 0.08);
}