:root {
  --color-bg: #ffffff;
  --color-text: #333333;
  --color-accent: #1e88e5;
  --color-accent-hover: #1976d2;
  --color-light: #eaeff4;
  --card-bg: #ffffff;
  --font-main: 'Inter', sans-serif;
  --radius: 10px;
  --spacing: 1.6rem;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.08);
  --transition: all 0.3s ease;
  --transition-fast: all 0.2s ease;
}
.dark-mode {
  --color-bg: #121212;
  --color-text: #f5f5f5;
  --color-accent: #64b5f6;
  --color-accent-hover: #90caf9;
  --color-light: #1e1e1e;
  --card-bg: #1e1e1e;
  --shadow: 0 4px 20px rgba(255, 255, 255, 0.05);
  --shadow-hover: 0 8px 25px rgba(255, 255, 255, 0.08);
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html, body {
  height: 100%;
}
body {
  font-family: var(--font-main);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}
.teachers-page {
  padding: 60px 0;
  background-color: var(--color-bg);
  min-height: calc(100vh - 200px);
}
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}
.page-title {
  text-align: center;
  color: var(--color-accent);
  margin-bottom: 50px;
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  position: relative;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.8s ease forwards;
}
.page-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--color-accent);
  border-radius: 2px;
  opacity: 0;
  animation: fadeIn 0.5s ease 0.4s forwards;
}
@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes fadeIn {
  to {
    opacity: 1;
  }
}
.teachers-controls-tc {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 30px;
  width: 100%;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
.search-container-tc {
  position: relative;
  width: 100%;
  max-width: 700px;
  margin: 0 auto;
}
.search-icon-tc {
  position: absolute;
  left: 25px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-accent);
  opacity: 0.7;
  transition: var(--transition);
  pointer-events: none;
  font-size: 1rem;
}
.search-input-tc {
  width: 100%;
  padding: 14px 25px 14px 50px;
  font-size: 1rem;
  border: 3px solid var(--color-light);
  border-radius: 30px;
  background-color: var(--card-bg);
  color: var(--color-text);
  transition: var(--transition);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
  font-family: var(--font-main);
  height: 50px;
}
.search-input-tc::placeholder {
  padding-left: 40px;
}
.search-input-tc:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(30, 136, 229, 0.2);
}
.search-input-tc:focus + .search-icon-tc {
  opacity: 1;
  color: var(--color-accent-hover);
}
.search-input-tc:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}
.clear-search-tc {
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--color-text);
  opacity: 0.5;
  cursor: pointer;
  padding: 5px;
  border-radius: 50%;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  font-size: 0.9rem;
}
.clear-search-tc:hover {
  opacity: 0.8;
  background-color: var(--color-light);
}
.clear-search-tc:focus-visible {
  outline: 3px solid var(--color-accent);
  opacity: 0.8;
}
.clear-search-tc:active {
  transform: translateY(-50%) scale(0.95);
}
.filters-container {
  display: flex;
  flex-wrap: nowrap;
  overflow-x: auto;
  gap: 10px;
  justify-content: flex-start;
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  padding-bottom: 8px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.filters-container::-webkit-scrollbar {
  display: none;
}
.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background-color: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-light);
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.filter-btn:hover {
  background-color: var(--color-light);
  border-color: color-mix(in srgb, var(--color-light) 50%, var(--color-accent) 50%);
  transform: translateY(-1px);
}
.filter-btn:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}
.filter-btn--active {
  background-color: color-mix(in srgb, var(--color-accent) 15%, transparent 85%);
  color: var(--color-accent);
  border-color: var(--color-accent);
  font-weight: 600;
}
.filter-btn--active:hover {
  background-color: color-mix(in srgb, var(--color-accent) 20%, transparent 80%);
}
.filter-btn i {
  font-size: 0.9rem;
}
.department-filter-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 15px;
  background-color: var(--card-bg);
  border-radius: 8px;
  border: 1px solid var(--color-light);
  box-shadow: var(--shadow);
  animation: fadeInSlideDown 0.3s ease forwards;
  max-width: 600px;
  margin: 0 auto;
}
@keyframes fadeInSlideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.department-filter-label {
  font-weight: 500;
  color: var(--color-text);
  font-size: 1rem;
}
.department-select {
  padding: 10px 15px;
  border: 1px solid var(--color-light);
  border-radius: 6px;
  background-color: var(--card-bg);
  color: var(--color-text);
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  min-width: 250px;
  font-family: var(--font-main);
}
.department-select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(30, 136, 229, 0.2);
}
.department-select:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}
.teachers-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 50px;
}
.teacher-card__accent {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  border-radius: var(--radius);
  overflow: hidden;
  opacity: 0;
  transition: var(--transition);
  z-index: -1;
}
.teacher-card__accent::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, rgba(30, 136, 229, 0.1) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.5s ease;
}
.teacher-card:hover .teacher-card__accent {
  opacity: 1;
}
.teacher-card:hover .teacher-card__accent::before {
  opacity: 0.4;
}
.teacher-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 25px 30px;
  position: relative;
  transition: var(--transition);
  border: 2px solid transparent;
  overflow: visible;
  opacity: 0;
  transform: translateY(20px);
  animation: cardSlideIn 0.6s ease forwards;
  z-index: 1;
}
@keyframes cardSlideIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.teacher-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--color-accent);
  transform: translateY(-3px);
  z-index: 2;
}
.teacher-card:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
  border-color: transparent;
}
.teacher-main-info {
  display: flex;
  align-items: center;
  gap: 20px;
  position: relative;
}
.teacher-card__decoration {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 24px;
  height: 24px;
  opacity: 0.1;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--color-accent);
}
.teacher-card__decoration::after {
  content: "♪";
}
.teacher-card:hover .teacher-card__decoration {
  opacity: 0.3;
  transform: rotate(15deg) scale(1.1);
}
.teacher-avatar {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-light), color-mix(in srgb, var(--color-light) 70%, #000 30%));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--color-accent);
  flex-shrink: 0;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  transition: var(--transition-fast);
  position: relative;
  overflow: hidden;
}
.teacher-card:hover .teacher-avatar {
  transform: scale(1.05);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.15);
}
.teacher-avatar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.4), transparent 70%);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.teacher-card:hover .teacher-avatar::before {
  opacity: 1;
}
.teacher-text-info {
  flex: 1;
  position: relative;
}
.teacher-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
  line-height: 1.2;
  letter-spacing: -0.3px;
  transition: var(--transition-fast);
}
.teacher-card:hover .teacher-name {
  color: var(--color-accent);
}
.teacher-position {
  font-size: 1.1rem;
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: 10px;
  line-height: 1.3;
  transition: var(--transition-fast);
}
.teacher-card:hover .teacher-position {
  letter-spacing: 0.3px;
}
.teacher-department {
  font-size: 0.95rem;
  color: color-mix(in srgb, var(--color-text) 60%, transparent 40%);
  background: var(--color-light);
  padding: 6px 12px;
  border-radius: 20px;
  display: inline-block;
  font-weight: 500;
  transition: var(--transition-fast);
}
.teacher-card:hover .teacher-department {
  background: color-mix(in srgb, var(--color-light) 70%, var(--color-accent) 15%);
  transform: translateY(-2px);
}
.teacher-hover-indicator {
  color: var(--color-accent);
  font-size: 1.2rem;
  opacity: 0.6;
  transition: var(--transition);
  align-self: center;
  margin-left: 10px;
  flex-shrink: 0;
}
.teacher-card:hover .teacher-hover-indicator {
  opacity: 1;
  transform: scale(1.15) rotate(10deg);
  text-shadow: 0 0 8px rgba(30, 136, 229, 0.3);
}
.teacher-detail-popup {
  position: absolute;
  left: 100%;
  top: 50%;
  transform: translateY(-50%) translateX(10px);
  width: 280px;
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
  z-index: 1000;
  margin-left: 10px;
  border: 1px solid color-mix(in srgb, var(--color-accent) 30%, transparent 70%);
  font-size: 0.9rem;
}
.teacher-detail-popup::before {
  content: '';
  position: absolute;
  right: 100%;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
  border-right: 10px solid var(--card-bg);
}
.teacher-card:hover .teacher-detail-popup {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
}
.teacher-detail-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-light);
}
.teacher-detail-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.teacher-detail-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.teacher-detail-label {
  font-weight: 500;
  color: var(--color-accent);
  font-size: 0.8rem;
  display: block;
}
.teacher-detail-value {
  font-size: 0.9rem;
  color: var(--color-text);
  line-height: 1.3;
}
.loading {
  text-align: center;
  padding: 60px 20px;
  font-size: 1.2rem;
  color: var(--color-text);
  opacity: 0.7;
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.no-teachers {
  text-align: center;
  padding: 60px 20px;
  font-size: 1.2rem;
  color: var(--color-text);
  opacity: 0.6;
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.error-message {
  text-align: center;
  padding: 60px 20px;
  font-size: 1.2rem;
  color: #e74c3c;
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
#loadMoreBtn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 30px;
  border-radius: 25px;
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  border: 2px solid var(--color-accent);
  cursor: pointer;
  font-size: 1rem;
  min-width: 180px;
  background: transparent;
  color: var(--color-accent);
  margin: 30px auto;
  max-width: 300px;
  width: 100%;
  box-sizing: border-box;
}
#loadMoreBtn:hover {
  background: var(--color-accent);
  color: white;
  transform: translateY(-3px);
  box-shadow: 0 4px 10px rgba(30, 136, 229, 0.2);
}
#loadMoreBtn:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}
#loadMoreBtn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
  background: transparent;
  color: var(--color-accent);
}
#noMoreTeachers {
  text-align: center;
  padding: 40px 20px;
  font-size: 1.1rem;
  color: var(--color-text);
  opacity: 0.6;
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-top: 20px;
}
@media (max-width: 768px) {
  .teachers-page {
    padding: 40px 0;
  }
  .page-title {
    font-size: 2rem;
    margin-bottom: 40px;
  }
  .container {
    padding: 0 15px;
  }
  .teachers-controls-tc {
    gap: 15px;
    padding: 0 10px;
  }
  .search-input-tc {
    padding: 10px 12px 10px 35px;
    font-size: 0.95rem;
  }
  .search-icon-tc {
    left: 10px;
    font-size: 0.85rem;
  }
  .clear-search-tc {
    right: 10px;
    width: 18px;
    height: 18px;
    font-size: 0.75rem;
  }
  .filters-container {
    gap: 6px;
  }
  .filter-btn {
    padding: 6px 12px;
    font-size: 0.85rem;
    gap: 5px;
  }
  .filter-btn span {
    font-size: 0.8rem;
  }
  .filter-btn i {
    font-size: 0.9rem;
  }
  .department-filter-container {
    padding: 12px;
  }
  .department-filter-label {
    font-size: 0.9rem;
  }
  .department-select {
    min-width: 200px;
    font-size: 0.9rem;
    padding: 8px 12px;
  }
  .teacher-card {
    padding: 20px;
    cursor: pointer;
  }
  .teacher-card:hover {
    transform: translateY(-3px);
  }
  .teacher-main-info {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 15px;
  }
  .teacher-avatar {
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
    margin: 0 auto;
  }
  .teacher-name {
    font-size: 1.3rem;
  }
  .teacher-position {
    font-size: 1rem;
  }
  .teacher-department {
    font-size: 0.95rem;
    margin: 0 auto;
  }
  .teacher-hover-indicator {
    display: none;
  }
  .teacher-card__decoration {
    top: 5px;
    right: 5px;
    width: 20px;
    height: 20px;
    font-size: 14px;
  }
  .teacher-detail-popup {
    display: none;
  }
}
.bottom-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2000;
  background: var(--card-bg);
  border-radius: 24px 24px 0 0;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.2);
  transform: translateY(100%);
  transition: transform 0.3s ease;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
}
.bottom-sheet.open {
  transform: translateY(0);
}
.bottom-sheet__drag-handle {
  width: 40px;
  height: 4px;
  background: var(--color-light);
  border-radius: 2px;
  margin: 12px auto;
  cursor: pointer;
}
.bottom-sheet__content {
  padding: 20px;
  overflow-y: auto;
  flex: 1;
}
.bottom-sheet__close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text);
  opacity: 0.6;
  transition: opacity 0.2s;
}
.bottom-sheet__close:hover {
  opacity: 1;
}
.bottom-sheet__title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 12px;
  padding-right: 30px;
}
.bottom-sheet__position {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: 8px;
}
.bottom-sheet__department {
  font-size: 0.95rem;
  background: var(--color-light);
  padding: 6px 12px;
  border-radius: 20px;
  display: inline-block;
  margin-bottom: 20px;
}
.bottom-sheet__info-item {
  margin-bottom: 16px;
}
.bottom-sheet__info-label {
  font-weight: 600;
  color: var(--color-accent);
  font-size: 0.85rem;
  text-transform: uppercase;
  display: block;
  margin-bottom: 4px;
}
.bottom-sheet__info-value {
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.4;
}
.bottom-sheet-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s;
}
.bottom-sheet-overlay.open {
  opacity: 1;
  visibility: visible;
}
@media (max-width: 768px) {
  .bottom-sheet {
    display: flex;
  }
}
@media (min-width: 769px) {
  .bottom-sheet,
  .bottom-sheet-overlay {
    display: none;
  }
}
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}