/* ============================================================
   Lumen — панель учителя v4 (новый дизайн)
   Подключается только в teacher.html
   ============================================================ */

/* ---------- Обёртка ---------- */
.teacher-v4 {
  position: relative;
  z-index: 10;
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
}

/* ---------- ХЕДЕР ---------- */
.teacher-v4 .header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  gap: 16px;
  flex-wrap: wrap;
}
.teacher-v4 .logo { display: flex; align-items: center; gap: 12px; }
.teacher-v4 .logo-icon {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, #7c5cff, #4a7dff);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  box-shadow: 0 8px 24px rgba(124, 92, 255, 0.5);
}
.teacher-v4 .logo-text h1 { font-size: 18px; font-weight: 700; margin: 0; }
.teacher-v4 .logo-text p { font-size: 12px; color: #9aa0b4; margin: 0; }
.teacher-v4 .header-right { display: flex; gap: 10px; align-items: center; }

.teacher-v4 .chip {
  background: rgba(26, 31, 56, 0.7);
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 13px;
  border: 1px solid rgba(255,255,255,0.08);
}
.teacher-v4 .chip b {
  color: #7dffb0;
  letter-spacing: 2px;
  font-size: 15px;
  font-family: Consolas, monospace;
}

.teacher-v4 .icon-btn {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: rgba(26, 31, 56, 0.7);
  border: 1px solid rgba(255,255,255,0.08);
  color: #eaeaf0;
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  transition: all 0.15s;
}
.teacher-v4 .icon-btn:hover { background: rgba(124, 92, 255, 0.15); }

/* ---------- ВКЛАДКИ ---------- */
.teacher-v4 .tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
  background: rgba(15, 18, 32, 0.7);
  padding: 6px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.08);
  width: fit-content;
  flex-wrap: wrap;
}
.teacher-v4 .tab {
  padding: 10px 20px;
  border-radius: 10px;
  border: none;
  background: transparent;
  color: #9aa0b4;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}
.teacher-v4 .tab.active {
  background: linear-gradient(135deg, #7c5cff, #4a7dff);
  color: #fff;
  box-shadow: 0 4px 12px rgba(124, 92, 255, 0.4);
}
.teacher-v4 .tab-badge {
  background: rgba(255,255,255,0.2);
  padding: 1px 7px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 700;
}

/* ---------- ПАНЕЛЬ ---------- */
.teacher-v4 .panel {
  background: rgba(20, 25, 45, 0.6);
  backdrop-filter: blur(24px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px;
  padding: 18px 22px;
  margin-bottom: 14px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

/* ---------- Строка контекста ---------- */
.teacher-v4 .context-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  margin-bottom: 14px;
}
.teacher-v4 .context-info {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
  font-size: 14px;
  color: #cfd3e3;
}
.teacher-v4 .context-info b { color: #b19dff; }
.teacher-v4 .context-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}
.teacher-v4 .action-btn {
  padding: 8px 14px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(255,255,255,0.04);
  color: #cfd3e3;
  font-weight: 600;
  font-size: 12px;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.teacher-v4 .action-btn:hover {
  background: rgba(124, 92, 255, 0.15);
  color: #fff;
  border-color: rgba(124, 92, 255, 0.4);
}

/* ---------- Ссылка-приглашение ---------- */
.teacher-v4 .invite-row {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  padding: 12px 16px;
  background: rgba(124, 92, 255, 0.08);
  border: 1px solid rgba(124, 92, 255, 0.25);
  border-radius: 12px;
  margin-bottom: 14px;
}
.teacher-v4 .invite-label {
  font-size: 12px;
  color: #b19dff;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}
.teacher-v4 .invite-link {
  font-family: Consolas, monospace;
  font-size: 12px;
  color: #cfd3e3;
  word-break: break-all;
  flex: 1;
  min-width: 200px;
}
.teacher-v4 .invited-counter {
  font-size: 12px;
  color: #9aa0b4;
  white-space: nowrap;
}
.teacher-v4 .invited-counter b { color: #7dffb0; font-size: 14px; }

/* ---------- Ключевые слова ---------- */
.teacher-v4 .keywords-input {
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(15, 18, 32, 0.6);
  color: #eaeaf0;
  font-size: 12px;
  font-family: inherit;
  outline: none;
  width: 220px;
  transition: border-color 0.15s;
}
.teacher-v4 .keywords-input:focus { border-color: #7c5cff; }
.teacher-v4 .keywords-input::placeholder { color: #6a7290; }

/* ---------- Анонимный чекбокс ---------- */
.teacher-v4 .anon-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 10px;
  background: rgba(15, 18, 32, 0.6);
  border: 1px solid rgba(255,255,255,0.08);
  font-size: 12px;
  color: #cfd3e3;
  cursor: pointer;
  user-select: none;
}
.teacher-v4 .anon-toggle input { accent-color: #7c5cff; cursor: pointer; }

/* ---------- Выпадашки ---------- */
.teacher-v4 .dd-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 12px;
  align-items: center;
}
.teacher-v4 .dd-field { display: flex; align-items: center; gap: 10px; }
.teacher-v4 .dd-field-label {
  font-size: 12px;
  color: #9aa0b4;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  min-width: 55px;
}
.teacher-v4 .dropdown {
  position: relative;
  display: inline-block;
  min-width: 220px;
}
.teacher-v4 .dropdown-trigger {
  width: 100%;
  padding: 10px 14px;
  border-radius: 11px;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(15, 18, 32, 0.6);
  color: #eaeaf0;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  transition: all 0.15s;
  font-weight: 600;
}
.teacher-v4 .dropdown-trigger:hover { border-color: rgba(124, 92, 255, 0.5); }
.teacher-v4 .dropdown.open .dropdown-trigger {
  border-color: #7c5cff;
  box-shadow: 0 0 0 2px rgba(124, 92, 255, 0.15);
}
.teacher-v4 .dropdown-arrow {
  color: #7c5cff;
  font-size: 10px;
  transition: transform 0.2s;
}
.teacher-v4 .dropdown.open .dropdown-arrow { transform: rotate(180deg); }
.teacher-v4 .dropdown-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: rgba(20, 25, 45, 0.98);
  backdrop-filter: blur(24px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  padding: 6px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.6);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: all 0.15s;
  z-index: 100;
  max-height: 300px;
  overflow-y: auto;
}
.teacher-v4 .dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.teacher-v4 .dropdown-item {
  padding: 9px 12px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 13px;
  color: #cfd3e3;
  transition: background 0.1s;
}
.teacher-v4 .dropdown-item:hover { background: rgba(124, 92, 255, 0.15); color: #fff; }
.teacher-v4 .dropdown-item.selected {
  background: rgba(124, 92, 255, 0.2);
  color: #fff;
  font-weight: 600;
}
.teacher-v4 .dropdown-item .check { color: #7c5cff; font-weight: 800; opacity: 0; }
.teacher-v4 .dropdown-item.selected .check { opacity: 1; }

/* ---------- Строка вопроса ---------- */
.teacher-v4 .ask-row {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}
.teacher-v4 .ask-row input[type="text"] {
  flex: 1;
  min-width: 200px;
  padding: 12px 16px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(15, 18, 32, 0.6);
  color: #eaeaf0;
  font-size: 14px;
  font-family: inherit;
  outline: none;
}
.teacher-v4 .ask-row input[type="text"]:focus { border-color: #7c5cff; }
.teacher-v4 .ask-row input[type="text"]::placeholder { color: #6a7290; }
.teacher-v4 .ask-row select {
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(15, 18, 32, 0.6);
  color: #eaeaf0;
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  outline: none;
}
.teacher-v4 .btn {
  padding: 12px 20px;
  border-radius: 12px;
  border: none;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.teacher-v4 .btn-primary {
  background: linear-gradient(135deg, #7c5cff, #4a7dff);
  color: #fff;
  box-shadow: 0 6px 20px rgba(124, 92, 255, 0.4);
}
.teacher-v4 .btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }
.teacher-v4 .btn-ghost {
  background: rgba(255,255,255,0.05);
  color: #eaeaf0;
  border: 1px solid rgba(255,255,255,0.1);
}
.teacher-v4 .btn-ghost:hover { background: rgba(255,255,255,0.1); }

/* ---------- Скрытые поля ---------- */
.teacher-v4 .hidden { display: none !important; }

/* ---------- Квиз-билдер ---------- */
.teacher-v4 .quiz-builder {
  margin-top: 12px;
  padding: 14px 16px;
  background: rgba(124, 92, 255, 0.06);
  border: 1px solid rgba(124, 92, 255, 0.2);
  border-radius: 14px;
}
.teacher-v4 .quiz-builder-label {
  font-size: 12px;
  color: #b19dff;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  margin-bottom: 10px;
}
.teacher-v4 .quiz-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 8px;
  margin-bottom: 10px;
}
.teacher-v4 .quiz-input {
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(15, 18, 32, 0.6);
  color: #eaeaf0;
  font-size: 13px;
  font-family: inherit;
  outline: none;
}
.teacher-v4 .quiz-input:focus { border-color: #7c5cff; }
.teacher-v4 .quiz-correct-row {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 13px;
  color: #9aa0b4;
}
.teacher-v4 .quiz-correct-row select {
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(15, 18, 32, 0.6);
  color: #eaeaf0;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  outline: none;
}
.teacher-v4 .quiz-correct-row select:focus { border-color: #7c5cff; }

/* ---------- Счётчики ---------- */
.teacher-v4 .stats {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 16px;
}
.teacher-v4 .stat-pill {
  padding: 10px 16px;
  border-radius: 12px;
  background: rgba(15, 18, 32, 0.6);
  border: 1px solid rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  flex: 1;
  min-width: 130px;
}
.teacher-v4 .stat-pill .emoji { font-size: 18px; }
.teacher-v4 .stat-pill .label { color: #cfd3e3; font-weight: 600; flex: 1; }
.teacher-v4 .stat-pill .num {
  font-size: 20px;
  font-weight: 800;
  font-family: Consolas, monospace;
  color: #eaeaf0;
}
.teacher-v4 .stat-pill.g { border-color: rgba(74, 222, 128, 0.3); }
.teacher-v4 .stat-pill.g .num { color: #4ade80; }
.teacher-v4 .stat-pill.y { border-color: rgba(250, 204, 21, 0.3); }
.teacher-v4 .stat-pill.y .num { color: #facc15; }
.teacher-v4 .stat-pill.r { border-color: rgba(248, 113, 113, 0.3); }
.teacher-v4 .stat-pill.r .num { color: #f87171; }
.teacher-v4 .stat-pill.n { border-color: rgba(154, 160, 180, 0.2); }
.teacher-v4 .stat-pill.n .num { color: #9aa0b4; }

/* ---------- Карта класса ---------- */
.teacher-v4 .map {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.teacher-v4 .student {
  padding: 10px 14px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 13px;
  border: 1px solid;
  transition: transform 0.15s;
  position: relative;
}
.teacher-v4 .student:hover { transform: scale(1.05); }
.teacher-v4 .student.green { background: rgba(74, 222, 128, 0.15); border-color: rgba(74, 222, 128, 0.4); color: #86efac; }
.teacher-v4 .student.yellow { background: rgba(250, 204, 21, 0.15); border-color: rgba(250, 204, 21, 0.4); color: #fde047; }
.teacher-v4 .student.red { background: rgba(248, 113, 113, 0.15); border-color: rgba(248, 113, 113, 0.4); color: #fca5a5; }
.teacher-v4 .student.gray { background: rgba(154, 160, 180, 0.1); border-color: rgba(154, 160, 180, 0.3); color: #9aa0b4; }
.teacher-v4 .student.picked {
  border-color: #f39c12;
  box-shadow: 0 0 0 3px #f39c12, 0 0 24px rgba(243, 156, 18, .5);
  transform: scale(1.08);
}
.teacher-v4 .student.hand-raised {
  border-color: #f1c40f;
  box-shadow: 0 0 0 2px #f1c40f;
}
.teacher-v4 .student.unfocused {
  opacity: 0.55;
  filter: grayscale(0.4);
}

/* ---------- Нижняя строка ---------- */
.teacher-v4 .bottom-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
}
.teacher-v4 .bottom-row .group { display: flex; gap: 6px; flex-wrap: wrap; }

.teacher-v4 .hint {
  background: rgba(124, 92, 255, 0.1);
  border-left: 3px solid #7c5cff;
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 13px;
  color: #cfd3e3;
  margin-top: 12px;
}

/* ---------- Присутствие (сворачиваемое) ---------- */
.teacher-v4 .presence {
  margin-bottom: 14px;
  background: rgba(15, 18, 32, 0.6);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  overflow: hidden;
}
.teacher-v4 .presence summary {
  padding: 10px 16px;
  cursor: pointer;
  font-size: 13px;
  color: #9aa0b4;
  font-weight: 600;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  user-select: none;
}
.teacher-v4 .presence summary::-webkit-details-marker { display: none; }
.teacher-v4 .presence summary::before {
  content: '▶';
  font-size: 10px;
  color: #7c5cff;
  transition: transform 0.2s;
}
.teacher-v4 .presence[open] summary::before { transform: rotate(90deg); }
.teacher-v4 .presence-content {
  padding: 0 16px 14px;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 13px;
}
.teacher-v4 .presence-item { color: #9aa0b4; }
.teacher-v4 .presence-item b { color: #eaeaf0; font-size: 15px; }

/* ---------- Класс: списки зашли/не зашли ---------- */
.teacher-v4 .class-col-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 8px 4px 4px;
}
.teacher-v4 .class-col-present { color: #7dffb0; }
.teacher-v4 .class-col-absent { color: #f5c06b; }
.teacher-v4 .class-student-item {
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 2px;
}
.teacher-v4 .class-student-item.present {
  color: #7dffb0;
  border-left: 3px solid #2ecc71;
}
.teacher-v4 .class-student-item.absent {
  color: #9aa0b4;
  border-left: 3px solid #f39c12;
  opacity: 0.7;
}

/* ---------- Светлая тема ---------- */
body.light .teacher-v4 .panel { background: rgba(255,255,255,0.7); border-color: #d0d5e0; }
body.light .teacher-v4 .chip { background: #fff; border-color: #d0d5e0; }
body.light .teacher-v4 .icon-btn { background: #fff; border-color: #d0d5e0; color: #1a1d29; }
body.light .teacher-v4 .tabs { background: rgba(255,255,255,0.8); border-color: #d0d5e0; }
body.light .teacher-v4 .tab { color: #6a7290; }
body.light .teacher-v4 .tab.active { color: #fff; }
body.light .teacher-v4 .dropdown-trigger { background: #fff; color: #1a1d29; border-color: #d0d5e0; }
body.light .teacher-v4 .dropdown-menu { background: #fff; }
body.light .teacher-v4 .dropdown-item { color: #1a1d29; }
body.light .teacher-v4 .ask-row input[type="text"] { background: #fff; color: #1a1d29; border-color: #d0d5e0; }
body.light .teacher-v4 .ask-row select { background: #fff; color: #1a1d29; border-color: #d0d5e0; }
body.light .teacher-v4 .keywords-input { background: #fff; color: #1a1d29; border-color: #d0d5e0; }
body.light .teacher-v4 .anon-toggle { background: #fff; color: #1a1d29; }
body.light .teacher-v4 .stat-pill { background: #fff; }
body.light .teacher-v4 .student.gray { background: rgba(154, 160, 180, 0.1); }
body.light .teacher-v4 .presence { background: #fff; border-color: #d0d5e0; }
/* Кнопки в модалках (вне .teacher-v4) */
.modal .btn-primary {
  background: linear-gradient(135deg, #7c5cff, #4a7dff);
  color: #fff;
  border: none;
  border-radius: 12px;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  box-shadow: 0 6px 20px rgba(124, 92, 255, 0.4);
  transition: all 0.15s;
}
.modal .btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }

.modal .btn-ghost {
  background: rgba(255,255,255,0.05);
  color: #eaeaf0;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  font-weight: 700;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
}
.modal .btn-ghost:hover { background: rgba(255,255,255,0.1); }

body.light .modal .btn-ghost {
  background: rgba(0,0,0,0.05);
  color: #1a1d29;
  border-color: rgba(0,0,0,0.1);
}
body.light .modal .btn-ghost:hover { background: rgba(0,0,0,0.1); }

/* Активная тема */
.theme-btn-active {
  box-shadow: 0 0 0 2px #7c5cff, 0 6px 20px rgba(124, 92, 255, 0.4) !important;
}

/* ============================================================
   ДОСКА (v2.0) — базовый layout, остальное в board.css
   ============================================================ */

.teacher-v4 .board-layout {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 14px;
  min-height: 620px;
  margin-bottom: 14px;
}

@media (max-width: 1000px) {
  .teacher-v4 .board-layout {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   ДОСКА v2.0 — 3-колоночный layout (тулбар / canvas / панель)
   ============================================================ */

.teacher-v4 .board-layout {
  display: grid;
  grid-template-columns: 56px 1fr 380px;
  gap: 14px;
  min-height: 640px;
  margin-bottom: 14px;
  align-items: start;
}

@media (max-width: 1400px) {
  .teacher-v4 .board-layout {
    grid-template-columns: 56px 1fr 340px;
  }
}

@media (max-width: 1150px) {
  .teacher-v4 .board-layout {
    grid-template-columns: 1fr;
  }
  .teacher-v4 .board-toolbar {
    flex-direction: row !important;
    flex-wrap: wrap;
    position: static !important;
    height: auto !important;
    width: 100%;
  }
  .teacher-v4 .board-tool-sep {
    width: 1px;
    height: 26px;
    margin: 0 4px;
  }
}