:root {
  --bg-color: var(--tg-theme-bg-color, #ffffff);
  --text-color: var(--tg-theme-text-color, #111827);
  --hint-color: var(--tg-theme-hint-color, #6b7280);
  --btn-color: var(--tg-theme-button-color, #2563eb);
  --btn-text-color: var(--tg-theme-button-text-color, #ffffff);
  --secondary-bg: var(--tg-theme-secondary-bg-color, #f3f4f6);
  --card-bg: var(--tg-theme-secondary-bg-color, #ffffff);
  --border-color: rgba(0, 0, 0, 0.08);
  --accent-color: #2563eb;
  --accent-light: rgba(37, 99, 235, 0.1);
  --ongoing-color: #10b981;
  --ongoing-bg: rgba(16, 185, 129, 0.12);
  --next-color: #f59e0b;
  --next-bg: rgba(245, 158, 11, 0.12);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: var(--tg-theme-bg-color, #181c24);
    --text-color: var(--tg-theme-text-color, #f9fafb);
    --hint-color: var(--tg-theme-hint-color, #9ca3af);
    --btn-color: var(--tg-theme-button-color, #3b82f6);
    --btn-text-color: var(--tg-theme-button-text-color, #ffffff);
    --secondary-bg: var(--tg-theme-secondary-bg-color, #1f2937);
    --card-bg: var(--tg-theme-secondary-bg-color, #242c3d);
    --border-color: rgba(255, 255, 255, 0.08);
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  user-select: none;
}

.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 600px;
  margin: 0 auto;
  width: 100%;
}

/* Шапка */
.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background-color: var(--bg-color);
  padding: 12px 16px 8px;
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

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

.group-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--secondary-bg);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
}

.group-btn:active {
  opacity: 0.7;
}

.chevron-icon {
  transition: transform 0.2s ease;
}

.week-toggle {
  display: flex;
  background: var(--secondary-bg);
  padding: 3px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.week-btn {
  background: transparent;
  border: none;
  color: var(--hint-color);
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 600;
  border-radius: 9px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.week-btn.active {
  background: var(--btn-color);
  color: var(--btn-text-color);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

/* Дни недели */
.days-nav {
  display: flex;
  justify-content: space-between;
  gap: 6px;
}

.day-chip {
  flex: 1;
  background: var(--secondary-bg);
  border: 1px solid transparent;
  color: var(--hint-color);
  padding: 8px 0;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s ease;
  text-align: center;
}

.day-chip.active {
  background: var(--btn-color);
  color: var(--btn-text-color);
  border-color: var(--btn-color);
}

.day-chip.today-badge {
  position: relative;
}

.day-chip.today-badge::after {
  content: "";
  position: absolute;
  bottom: 3px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: currentColor;
}

/* Плашка живого статуса */
.live-status-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 10px 16px 4px;
  padding: 9px 14px;
  background: var(--accent-light);
  border-radius: 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-color);
}

/* Баннер установки PWA для браузера */
.pwa-install-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 8px 16px 4px;
  padding: 10px 14px;
  background: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: 14px;
}

.pwa-banner-content {
  display: flex;
  align-items: center;
  gap: 10px;
}

.pwa-icon {
  width: 28px;
  height: 28px;
  border-radius: 7px;
}

.pwa-banner-text {
  display: flex;
  flex-direction: column;
  font-size: 13px;
}

.pwa-banner-text span {
  font-size: 11px;
  color: var(--hint-color);
}

.pwa-action-btn {
  background: var(--btn-color);
  color: var(--btn-text-color);
  border: none;
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-color);
  animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.6; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.6; }
}

/* Контейнер карточек */
.schedule-container {
  flex: 1;
  padding: 12px 16px 80px;
  position: relative;
}

.cards-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Карточка пары */
.para-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 14px 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.para-card.is-ongoing {
  border: 1.5px solid var(--ongoing-color);
  background: var(--ongoing-bg);
}

.para-card.is-next {
  border: 1.5px solid var(--next-color);
  background: var(--next-bg);
}

.para-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.para-num-time {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--hint-color);
}

.para-num {
  background: var(--secondary-bg);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 12px;
}

.para-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.badge-ongoing {
  background: var(--ongoing-color);
  color: #ffffff;
}

.badge-next {
  background: var(--next-color);
  color: #ffffff;
}

.badge-completed {
  background: var(--secondary-bg);
  color: var(--hint-color);
}

.para-subject {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 8px;
}

.type-pill {
  font-size: 12px;
  font-weight: 500;
  color: var(--hint-color);
}

.para-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--hint-color);
}

.aud-pill {
  background: var(--secondary-bg);
  color: var(--text-color);
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
}

.subgroup-block {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--border-color);
}

.subgroup-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-color);
  text-transform: uppercase;
  margin-bottom: 2px;
}

/* Пустое состояние и лоадер */
.empty-state, .loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
  color: var(--hint-color);
}

.empty-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--text-color);
}

.empty-subtitle {
  font-size: 14px;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3.5px solid var(--border-color);
  border-top-color: var(--btn-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 16px;
}

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

/* Нижняя панель */
.app-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-color);
  border-top: 1px solid var(--border-color);
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom, 0px));
  z-index: 20;
}

.subgroup-selector {
  display: flex;
  background: var(--secondary-bg);
  padding: 3px;
  border-radius: 12px;
  max-width: 600px;
  margin: 0 auto;
}

.sg-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--hint-color);
  padding: 8px 0;
  font-size: 13px;
  font-weight: 600;
  border-radius: 9px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.sg-btn.active {
  background: var(--btn-color);
  color: var(--btn-text-color);
}

/* Модальное окно выбора группы */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 100;
  display: flex;
  align-items: flex-end;
  transition: opacity 0.2s ease;
}

.modal-sheet {
  background: var(--bg-color);
  width: 100%;
  max-height: 85vh;
  border-radius: 20px 20px 0 0;
  padding: 16px;
  display: flex;
  flex-direction: column;
  animation: slideUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

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

.close-btn {
  background: var(--secondary-bg);
  border: none;
  font-size: 20px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  color: var(--text-color);
}

.search-box {
  margin-bottom: 12px;
}

.search-box input {
  width: 100%;
  padding: 12px 14px;
  background: var(--secondary-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  font-size: 15px;
  color: var(--text-color);
  outline: none;
}

.groups-list {
  overflow-y: auto;
  max-height: 60vh;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.course-section-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--hint-color);
  text-transform: uppercase;
  margin-top: 8px;
  margin-bottom: 4px;
}

.group-item-btn {
  background: var(--secondary-bg);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s ease;
}

.group-item-btn:active {
  background: var(--btn-color);
  color: var(--btn-text-color);
}

.group-btn:hover {
  background: var(--border-color);
}


/* Кнопка преподавателя в карточке пары */
.teacher-btn-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--accent-light);
  color: var(--accent-color);
  border: 1px solid rgba(37, 99, 235, 0.25);
  border-radius: 8px;
  padding: 3px 8px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  outline: none;
  transition: all 0.15s ease;
  max-width: 100%;
  text-align: left;
  line-height: 1.3;
}

.teacher-btn-chip:hover {
  background: var(--accent-color);
  color: #fff;
  border-color: var(--accent-color);
}

.teacher-btn-chip:active {
  transform: scale(0.97);
}

.teacher-btn-chip .teacher-icon {
  flex-shrink: 0;
}

.teacher-btn-chip .teacher-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.teacher-btn-chip .teacher-post-hint {
  font-size: 11px;
  opacity: 0.85;
  font-weight: normal;
  white-space: nowrap;
}

.teacher-btn-chip .teacher-arrow {
  flex-shrink: 0;
  opacity: 0.7;
}

/* Карточка и модальное окно преподавателя */
.teacher-modal-sheet {
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.teacher-modal-sheet .modal-header {
  flex-shrink: 0;
  position: sticky;
  top: 0;
  background: var(--card-bg);
  z-index: 10;
}

.teacher-details {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-bottom: 8px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  flex: 1;
}

.teacher-profile-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-color);
}

.teacher-avatar-wrap {
  position: relative;
  width: 80px;
  height: 80px;
  flex-shrink: 0;
  border-radius: 50%;
  overflow: hidden;
  background: var(--secondary-bg);
  border: 2px solid var(--border-color);
}

.teacher-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.teacher-avatar-fallback {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--hint-color);
}

.teacher-main-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.teacher-fullname {
  font-size: 18px;
  font-weight: 700;
  margin: 0;
  line-height: 1.25;
  color: var(--text-color);
}

.teacher-post {
  font-size: 13px;
  color: var(--hint-color);
  line-height: 1.35;
}

.teacher-dept-badge {
  display: inline-block;
  align-self: flex-start;
  margin-top: 4px;
  padding: 3px 8px;
  background: var(--accent-light);
  color: var(--accent-color);
  font-size: 11px;
  font-weight: 600;
  border-radius: 6px;
}

.teacher-info-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--secondary-bg);
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.teacher-info-row {
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 13px;
}

.info-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--hint-color);
  text-transform: uppercase;
}

.info-value {
  color: var(--text-color);
  line-height: 1.4;
}

.info-link {
  color: var(--accent-color);
  text-decoration: none;
}

.info-link:hover {
  text-decoration: underline;
}

.info-disciplines {
  font-size: 12px;
  color: var(--text-color);
  max-height: 120px;
  overflow-y: auto;
}

.teacher-actions {
  display: flex;
  gap: 10px;
  margin-top: 4px;
  padding-top: 10px;
  border-top: 1px solid var(--border-color);
  background: var(--card-bg);
  flex-shrink: 0;
}

.teacher-close-btn {
  flex: 1;
  padding: 11px 14px;
  background: transparent;
  color: var(--text-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.teacher-close-btn:hover {
  background: var(--secondary-bg);
}

.teacher-close-btn:active {
  opacity: 0.7;
}

.teacher-site-btn {
  flex: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 16px;
  background: var(--btn-color);
  color: var(--btn-text-color);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  border-radius: 12px;
  transition: opacity 0.15s ease;
}

.teacher-site-btn:active {
  opacity: 0.8;
}

.hidden {
  display: none !important;
}