/* ============================================
   DERS TAKIP — Premium Attendance Tracking CSS
   ============================================ */

/* === CSS Variables === */
:root {
  --primary-cream: #FAFAD0;
  --primary-navy: #002B47;
  --accent-green: #3B7A57;
  --text-color: #000000;
  --white: #FFFFFF;
  --navy-hover: #003D63;
  --green-hover: #4A9A6E;
  --danger: #DC3545;
  --warning: #F0AD4E;
  --shadow: 0 4px 24px rgba(0, 43, 71, 0.12);
  --shadow-lg: 0 8px 40px rgba(0, 43, 71, 0.2);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === Reset & Base === */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--primary-cream);
  color: var(--text-color);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
}

input, select, textarea {
  font-family: inherit;
}

/* === Login View === */
#login-view {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  background: linear-gradient(135deg, #002B47 0%, #003D63 50%, #002B47 100%);
  position: relative;
  overflow: visible;
  padding: 60px 20px 40px 20px;
  box-sizing: border-box;
}

#login-view::before {
  content: '';
  position: absolute;
  top: -150px;
  left: -150px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(59, 122, 87, 0.12);
  animation: float 8s ease-in-out infinite;
  pointer-events: none;
}

#login-view::after {
  content: '';
  position: absolute;
  bottom: -100px;
  right: -100px;
  width: 350px;
  height: 350px;
  border-radius: 50%;
  background: rgba(250, 250, 208, 0.08);
  animation: float 10s ease-in-out infinite reverse;
  pointer-events: none;
}

.login-container {
  max-width: 440px;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  position: relative;
  z-index: 2;
  animation: slideUp 0.6s ease;
}

.login-header {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo {
  font-size: 48px;
  color: var(--accent-green);
  margin-bottom: 12px;
}

.login-header h1 {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary-navy);
  margin-bottom: 6px;
  letter-spacing: -0.5px;
}

.login-header p {
  font-size: 15px;
  color: #888;
  font-weight: 400;
}

#google-login-btn {
  width: 100%;
  background: var(--white);
  border: 1px solid #ddd;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 14px 24px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-color);
  cursor: pointer;
  transition: var(--transition);
}

#google-login-btn:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  transform: translateY(-1px);
}

#google-login-btn:active {
  transform: translateY(0);
}

#google-login-btn svg {
  flex-shrink: 0;
}

.login-divider {
  display: flex;
  align-items: center;
  margin: 24px 0;
  gap: 16px;
}

.login-divider::before,
.login-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: #ddd;
}

.login-divider span {
  font-size: 13px;
  color: #888;
  font-weight: 500;
}

/* === Auth Tabs === */
.auth-tabs {
  display: flex;
  margin-bottom: 24px;
  border-bottom: 2px solid #e0e0e0;
  gap: 8px;
}

.auth-tab {
  flex: 1;
  background: none;
  border: none;
  padding: 12px;
  font-weight: 600;
  font-size: 14px;
  color: #888;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
  margin-bottom: -2px;
}

.auth-tab:hover {
  color: var(--primary-navy);
}

.auth-tab.active {
  color: var(--primary-navy);
  border-bottom: 2px solid var(--accent-green);
}

/* === Form Groups === */
.form-group {
  margin-bottom: 20px;
  position: relative;
}

.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-navy);
  margin-bottom: 6px;
  display: block;
  letter-spacing: 0.2px;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid #e0e0e0;
  border-radius: 10px;
  font-size: 15px;
  color: var(--text-color);
  background: var(--white);
  transition: var(--transition);
  appearance: none;
  -webkit-appearance: none;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
  cursor: pointer;
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--accent-green);
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 122, 87, 0.1);
}

.form-group input::placeholder {
  color: #aaa;
}

.form-row {
  display: flex;
  gap: 16px;
}

.form-row > .form-group {
  flex: 1;
}

#login-submit,
#signup-submit {
  width: 100%;
  background: var(--primary-navy);
  color: var(--primary-cream);
  padding: 14px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 16px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

#login-submit:hover,
#signup-submit:hover {
  background: var(--navy-hover);
  transform: translateY(-1px);
}

#login-submit:active,
#signup-submit:active {
  transform: translateY(0);
}

#auth-error {
  background: rgba(220, 53, 69, 0.1);
  color: var(--danger);
  padding: 12px;
  border-radius: 8px;
  font-size: 14px;
  display: none;
  margin-bottom: 16px;
  text-align: center;
  font-weight: 500;
}

#auth-error.show {
  display: block;
}

.auth-toggle {
  text-align: center;
  margin-top: 20px;
  font-size: 14px;
  color: #666;
}

.auth-toggle button {
  color: var(--accent-green);
  font-weight: 600;
  cursor: pointer;
  text-decoration: underline;
  background: none;
  border: none;
  font-size: 14px;
  margin-left: 4px;
}

.auth-toggle button:hover {
  color: var(--green-hover);
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--primary-navy);
  color: var(--primary-cream);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

.navbar-brand {
  font-size: 20px;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.3px;
}

.navbar-brand i {
  color: var(--accent-green);
  font-size: 22px;
}

.navbar-user {
  display: flex;
  align-items: center;
  gap: 16px;
}

#user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid var(--accent-green);
  object-fit: cover;
}

#user-display-name {
  font-size: 14px;
  font-weight: 500;
}

#logout-btn {
  background: transparent;
  border: 1px solid rgba(250, 250, 208, 0.3);
  color: var(--primary-cream);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

#logout-btn:hover {
  background: rgba(250, 250, 208, 0.1);
  border-color: rgba(250, 250, 208, 0.5);
}

/* === Dashboard View === */
#dashboard-view {
  padding-top: 88px;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
  padding-bottom: 40px;
}

/* === Stats Grid === */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--white);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
}

.stat-card:nth-child(1)::before {
  background: var(--accent-green);
}

.stat-card:nth-child(2)::before {
  background: var(--primary-navy);
}

.stat-card:nth-child(3)::before {
  background: var(--danger);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.stat-card .stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 16px;
}

.stat-card:nth-child(1) .stat-icon {
  background: rgba(59, 122, 87, 0.1);
  color: var(--accent-green);
}

.stat-card:nth-child(2) .stat-icon {
  background: rgba(0, 43, 71, 0.1);
  color: var(--primary-navy);
}

.stat-card:nth-child(3) .stat-icon {
  background: rgba(220, 53, 69, 0.1);
  color: var(--danger);
}

.stat-value {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary-navy);
  line-height: 1;
}

.stat-label {
  font-size: 14px;
  color: #666;
  margin-top: 4px;
  font-weight: 400;
}

/* === Actions Bar === */
.actions-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.actions-bar h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary-navy);
  display: flex;
  align-items: center;
  gap: 10px;
}

.actions-bar h2 i {
  color: var(--accent-green);
}

.actions-buttons {
  display: flex;
  gap: 12px;
}

/* === Buttons === */
.btn {
  padding: 12px 24px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
  white-space: nowrap;
}

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

.btn-primary {
  background: var(--primary-navy);
  color: var(--primary-cream);
}

.btn-primary:hover {
  background: var(--navy-hover);
  transform: translateY(-1px);
}

.btn-success {
  background: var(--accent-green);
  color: var(--white);
}

.btn-success:hover {
  background: var(--green-hover);
  transform: translateY(-1px);
}

.btn-danger {
  background: var(--danger);
  color: var(--white);
}

.btn-danger:hover {
  background: #c82333;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary-navy);
  color: var(--primary-navy);
}

.btn-outline:hover {
  background: var(--primary-navy);
  color: var(--primary-cream);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* === Day Tabs === */
.day-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: none;
}

.day-tabs::-webkit-scrollbar {
  display: none;
}

.day-tab {
  padding: 10px 20px;
  border-radius: 30px;
  background: var(--white);
  border: 2px solid #ddd;
  color: var(--primary-navy);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
}

.day-tab:hover {
  background: #eee;
}

.day-tab.active {
  background: var(--primary-navy);
  color: var(--primary-cream);
  border-color: var(--primary-navy);
  box-shadow: 0 4px 12px rgba(0, 43, 71, 0.15);
}

/* === Agenda List === */
.agenda-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.agenda-card {
  background: var(--white);
  border-radius: 16px;
  padding: 20px 24px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-left: 6px solid #ccc;
  cursor: pointer;
  transition: var(--transition);
  gap: 16px;
}

.agenda-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.agenda-card.status-safe {
  border-left-color: var(--accent-green);
}

.agenda-card.status-warning {
  border-left-color: var(--warning);
}

.agenda-card.status-danger {
  border-left-color: var(--danger);
}

.agenda-time {
  min-width: 110px;
  font-weight: 700;
  color: var(--primary-navy);
  font-size: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-right: 2px solid #eee;
  padding-right: 16px;
}

.agenda-time .end-time {
  font-size: 13px;
  color: #888;
  font-weight: 500;
}

.agenda-info {
  flex: 1;
}

.agenda-info .course-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary-navy);
  margin-bottom: 6px;
}

.agenda-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12px;
  color: #666;
}

.agenda-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.agenda-meta i {
  color: var(--accent-green);
}

.agenda-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.quick-absence-btn {
  background: rgba(220, 53, 69, 0.1);
  color: var(--danger);
  border: 1px dashed var(--danger);
  padding: 8px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.quick-absence-btn:hover {
  background: var(--danger);
  color: var(--white);
  border-color: var(--danger);
}

/* === Agenda Dots === */
.agenda-dots {
  display: flex;
  gap: 4px;
  align-items: center;
}

/* === Course Card === */
.course-card {
  background: var(--white);
  border-radius: 10px;
  padding: 10px 12px;
  margin: 2px;
  border-left: 4px solid;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.course-card.status-safe {
  border-left-color: var(--accent-green);
}

.course-card.status-warning {
  border-left-color: var(--warning);
}

.course-card.status-danger {
  border-left-color: var(--danger);
}

.course-card:hover {
  transform: scale(1.02);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.course-card .course-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-navy);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.course-card .course-instructor {
  font-size: 11px;
  color: #888;
  margin-bottom: 6px;
}

.absence-indicator {
  display: flex;
  gap: 4px;
  align-items: center;
}

.absence-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #e0e0e0;
  transition: var(--transition);
}

.absence-dot.filled {
  background: var(--danger);
}

.absence-dot.filled.safe {
  background: var(--accent-green);
}

.absence-dot.filled.warning {
  background: var(--warning);
}

.absence-count {
  font-size: 11px;
  font-weight: 700;
  margin-left: auto;
}

/* === Empty State === */
.empty-state {
  text-align: center;
  padding: 80px 40px;
}

.empty-state i {
  font-size: 64px;
  color: #ccc;
  margin-bottom: 20px;
}

.empty-state h3 {
  font-size: 20px;
  color: var(--primary-navy);
  margin-bottom: 8px;
  font-weight: 700;
}

.empty-state p {
  color: #888;
  font-size: 15px;
  margin-bottom: 24px;
}

/* === Modal === */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 43, 71, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 36px;
  max-width: 520px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.9);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.active .modal-content {
  transform: scale(1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
}

.modal-header h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary-navy);
  display: flex;
  align-items: center;
  gap: 10px;
}

.modal-header h2 i {
  color: var(--accent-green);
}

.modal-close {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #f5f5f5;
  border: none;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #666;
  transition: var(--transition);
  flex-shrink: 0;
}

.modal-close:hover {
  background: #eee;
  color: var(--text-color);
}

.modal-footer {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid #f0f0f0;
}

/* === Upload / Drop Zone === */
#drop-zone {
  border: 2px dashed #ccc;
  border-radius: 16px;
  padding: 48px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
}

#drop-zone:hover {
  border-color: #bbb;
  background: rgba(0, 0, 0, 0.01);
}

.drop-zone-icon {
  font-size: 48px;
  color: #ccc;
  margin-bottom: 16px;
}

.drop-zone-text {
  font-size: 15px;
  color: #888;
  font-weight: 500;
}

.drop-zone-hint {
  font-size: 12px;
  color: #aaa;
  margin-top: 8px;
}

#drop-zone.dragover {
  border-color: var(--accent-green);
  background: rgba(59, 122, 87, 0.05);
}

#drop-zone.dragover .drop-zone-icon {
  color: var(--accent-green);
}

#drop-zone.has-file {
  border-color: var(--accent-green);
  border-style: solid;
  background: rgba(59, 122, 87, 0.03);
}

/* === File Preview === */
#file-preview {
  margin-top: 20px;
}

#file-preview table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

#file-preview th {
  background: var(--primary-navy);
  color: var(--primary-cream);
  padding: 10px 12px;
  text-align: left;
  font-weight: 600;
}

#file-preview th:first-child {
  border-radius: 8px 0 0 0;
}

#file-preview th:last-child {
  border-radius: 0 8px 0 0;
}

#file-preview td {
  padding: 8px 12px;
  border-bottom: 1px solid #f0f0f0;
  color: var(--text-color);
}

#file-preview tr:hover td {
  background: rgba(59, 122, 87, 0.03);
}

/* === Detail Modal === */
#detail-absence-bar {
  height: 12px;
  background: #f0f0f0;
  border-radius: 6px;
  overflow: hidden;
  margin: 16px 0;
}

#detail-absence-bar .bar-fill {
  height: 100%;
  border-radius: 6px;
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.bar-fill.safe {
  background: linear-gradient(90deg, #3B7A57, #4A9A6E);
}

.bar-fill.warning {
  background: linear-gradient(90deg, #F0AD4E, #f5c778);
}

.bar-fill.danger {
  background: linear-gradient(90deg, #DC3545, #e8606a);
}

#detail-absence-text {
  text-align: center;
  font-size: 24px;
  font-weight: 800;
  color: var(--primary-navy);
}

.history-list {
  list-style: none;
  padding: 0;
  max-height: 200px;
  overflow-y: auto;
  margin-top: 16px;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background: #f9f9f9;
  border-radius: 8px;
  margin-bottom: 6px;
  font-size: 14px;
  transition: var(--transition);
}

.history-item:hover {
  background: #f0f0f0;
}

.history-item .history-date {
  font-weight: 500;
  color: var(--primary-navy);
}

.history-item .history-undo {
  color: var(--danger);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  background: none;
  border: none;
  transition: var(--transition);
}

.history-item .history-undo:hover {
  text-decoration: underline;
}

.detail-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 20px;
}

/* === Toast === */
#toast-container {
  position: fixed;
  top: 80px;
  right: 24px;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 14px 20px;
  border-radius: 12px;
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 300px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  transform: translateX(120%);
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.4s ease;
  opacity: 0;
}

.toast.show {
  transform: translateX(0);
  opacity: 1;
}

.toast.success {
  background: var(--accent-green);
}

.toast.error {
  background: var(--danger);
}

.toast.warning {
  background: var(--warning);
  color: #000;
}

.toast.info {
  background: var(--primary-navy);
}

.toast i {
  font-size: 18px;
  flex-shrink: 0;
}

.toast-close {
  margin-left: auto;
  cursor: pointer;
  opacity: 0.7;
  background: none;
  border: none;
  color: inherit;
  font-size: 16px;
  padding: 2px;
  transition: var(--transition);
}

.toast-close:hover {
  opacity: 1;
}

/* === Utility Classes === */
.hidden {
  display: none !important;
}

.fade-in {
  animation: fadeIn 0.4s ease;
}

.slide-up {
  animation: slideUp 0.4s ease;
}

.shake {
  animation: shake 0.5s ease;
}

/* === Keyframe Animations === */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes shake {
  0%, 100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-5px);
  }
  75% {
    transform: translateX(5px);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(5deg);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* === Custom Scrollbar === */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: #f0f0f0;
  border-radius: 3px;
}

::-webkit-scrollbar-thumb {
  background: var(--primary-navy);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--navy-hover);
}

/* Firefox scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--primary-navy) #f0f0f0;
}

/* === Responsive — Tablet & Below === */
@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .navbar {
    padding: 0 16px;
  }

  .login-container {
    padding: 32px 24px;
    margin: 16px;
  }

  #schedule-grid {
    overflow-x: hidden;
  }

  #schedule-grid table {
    min-width: 100%;
  }

  .actions-bar {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }

  .actions-buttons {
    width: 100%;
  }

  .actions-buttons .btn {
    width: 100%;
    justify-content: center;
  }

  .modal-content {
    padding: 24px;
    margin: 16px;
  }

  .form-row {
    flex-direction: column;
    gap: 0;
  }

  .navbar-user {
    gap: 10px;
  }

  #user-display-name {
    display: none;
  }

  #dashboard-view {
    padding-left: 16px;
    padding-right: 16px;
  }

  .detail-actions {
    grid-template-columns: 1fr;
  }

  .toast {
    min-width: 260px;
  }
}

/* === Responsive — Mobile === */
@media (max-width: 480px) {
  .stat-value {
    font-size: 28px;
  }

  .navbar-brand {
    font-size: 16px;
  }

  .navbar-brand i {
    font-size: 18px;
  }

  .login-header h1 {
    font-size: 24px;
  }

  .login-logo {
    font-size: 40px;
  }

  #drop-zone {
    padding: 32px 20px;
  }

  .drop-zone-icon {
    font-size: 36px;
  }

  .empty-state {
    padding: 60px 24px;
  }

  .empty-state i {
    font-size: 48px;
  }
}

/* === Selection Color === */
::selection {
  background: rgba(59, 122, 87, 0.2);
  color: var(--primary-navy);
}

/* === Focus Visible for Accessibility === */
:focus-visible {
  outline: 2px solid var(--accent-green);
  outline-offset: 2px;
}

/* === Print Styles === */
@media print {
  .navbar,
  .actions-bar,
  .modal-overlay,
  #toast-container {
    display: none !important;
  }

  #dashboard-view {
    padding-top: 0;
  }

  .stat-card {
    box-shadow: none;
    border: 1px solid #ddd;
  }

  .course-card {
    break-inside: avoid;
  }
}

/* === Landing Page Sections (FAQ, Testimonials, Footer) === */
.login-page-container {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 20px 0 40px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 48px;
  position: relative;
  z-index: 2;
}

.landing-section-title {
  font-size: 22px;
  font-weight: 700;
  color: #FFFFFF;
  text-align: center;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

/* Testimonials Grid */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  width: 100%;
}

.testimonial-card {
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  padding: 24px;
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.25);
  display: flex;
  flex-direction: column;
  gap: 14px;
  border: 1px solid rgba(255, 255, 255, 0.4);
}

.testimonial-stars {
  color: #FFB800;
  font-size: 15px;
}

.testimonial-text {
  font-size: 14px;
  color: #2D3748;
  font-style: italic;
  line-height: 1.6;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: auto;
}

.testimonial-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--primary-navy);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
}

.testimonial-info h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--primary-navy);
}

.testimonial-info span {
  font-size: 12px;
  color: #718096;
}

/* FAQ Accordion */
.faq-list {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: rgba(255, 255, 255, 0.96);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: rgba(255, 255, 255, 0.98);
  border: none;
  text-align: left;
  font-size: 15px;
  font-weight: 600;
  color: var(--primary-navy);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-question i {
  transition: transform 0.3s ease;
  color: var(--accent-green);
}

.faq-item.active .faq-question i {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
  font-size: 14px;
  color: #4A5568;
  line-height: 1.6;
  background: #FFFFFF;
}

.faq-item.active .faq-answer {
  max-height: 200px;
  padding: 0 24px 20px 24px;
  border-top: 1px solid #EDF2F7;
}

/* Landing Footer */
.landing-footer {
  width: 100%;
  padding: 30px 20px;
  margin-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
  font-size: 13px;
  color: #E2E8F0;
}

.landing-footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}

.landing-footer-links button {
  background: none;
  border: none;
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: underline;
  transition: color 0.2s ease;
}

.landing-footer-links button:hover {
  color: var(--primary-cream);
}