/* Class Attendance — Modern UI Styling for Class Teachers */

:root {
  --ca-primary: #4710EB;
  --ca-primary-light: #f0ecfd;
  --ca-primary-hover: #370bc0;
  --ca-success: #10b981;
  --ca-success-light: #ecfdf5;
  --ca-warning: #f59e0b;
  --ca-warning-light: #fffbeb;
  --ca-danger: #ef4444;
  --ca-danger-light: #fef2f2;
  --ca-text: #1e293b;
  --ca-text-muted: #64748b;
  --ca-border: #e2e8f0;
  --ca-card-bg: #ffffff;
}

.ca-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 18px 16px 120px;
  font-family: inherit;
}

/* Glassmorphism Header */
.ca-header-card {
  background: linear-gradient(135deg, #4710EB 0%, #6320EE 50%, #7B2CBF 100%);
  border-radius: 20px;
  padding: 22px 24px;
  color: #ffffff;
  margin-bottom: 20px;
  box-shadow: 0 10px 25px -5px rgba(71, 16, 235, 0.35);
  position: relative;
  overflow: hidden;
}

.ca-header-card::after {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 140px;
  height: 140px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  pointer-events: none;
}

.ca-header-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
}

.ca-header-title {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 10px;
}

.ca-header-sub {
  margin: 6px 0 0;
  font-size: 13px;
  opacity: 0.9;
  line-height: 1.4;
}

.ca-badge-row {
  display: flex;
  gap: 8px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.ca-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: white;
}

.ca-badge-gold {
  background: rgba(251, 191, 36, 0.25);
  border-color: rgba(251, 191, 36, 0.4);
  color: #fef3c7;
}

/* Date Control Toolbar */
.ca-toolbar {
  background: var(--ca-card-bg);
  border: 1px solid var(--ca-border);
  border-radius: 16px;
  padding: 14px 18px;
  margin-bottom: 20px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.04);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.ca-date-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.ca-nav-btn {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--ca-border);
  background: #f8fafc;
  color: var(--ca-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.ca-nav-btn:hover {
  background: var(--ca-primary-light);
  color: var(--ca-primary);
  border-color: #cbd5e1;
}

.ca-date-input {
  padding: 7px 12px;
  border: 1px solid var(--ca-border);
  border-radius: 10px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ca-text);
  background: #f8fafc;
  outline: none;
  cursor: pointer;
}

.ca-date-input:focus {
  border-color: var(--ca-primary);
  box-shadow: 0 0 0 3px rgba(71, 16, 235, 0.12);
}

.ca-today-btn {
  padding: 8px 14px;
  border-radius: 10px;
  border: none;
  background: var(--ca-primary);
  color: #ffffff;
  font-size: 12.5px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s ease;
}

.ca-today-btn:hover {
  background: var(--ca-primary-hover);
}

.ca-class-select {
  padding: 8px 14px;
  border: 1px solid var(--ca-border);
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ca-text);
  background: #ffffff;
  outline: none;
  cursor: pointer;
}

/* Metric Cards Grid */
.ca-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

@media (max-width: 640px) {
  .ca-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.ca-stat-card {
  background: var(--ca-card-bg);
  border: 1px solid var(--ca-border);
  border-radius: 16px;
  padding: 14px 16px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
  position: relative;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.ca-stat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
}

.ca-stat-label {
  font-size: 11.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--ca-text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.ca-stat-number {
  font-size: 26px;
  font-weight: 800;
  margin: 6px 0 2px;
  line-height: 1.1;
}

.ca-stat-sub {
  font-size: 11px;
  color: var(--ca-text-muted);
}

/* Card Accent Colors */
.ca-stat-total .ca-stat-number { color: var(--ca-primary); }
.ca-stat-present .ca-stat-number { color: var(--ca-success); }
.ca-stat-absent .ca-stat-number { color: var(--ca-danger); }
.ca-stat-late .ca-stat-number { color: var(--ca-warning); }

/* Search & Filter Bar */
.ca-filter-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.ca-search-box {
  flex: 1 1 260px;
  position: relative;
  display: flex;
  align-items: center;
}

.ca-search-icon {
  position: absolute;
  left: 14px;
  color: #94a3b8;
  font-size: 14px;
  pointer-events: none;
}

.ca-search-input {
  width: 100%;
  padding: 10px 36px 10px 38px;
  border: 1px solid var(--ca-border);
  border-radius: 12px;
  font-size: 13.5px;
  background: #ffffff;
  outline: none;
  transition: all 0.2s ease;
}

.ca-search-input:focus {
  border-color: var(--ca-primary);
  box-shadow: 0 0 0 3px rgba(71, 16, 235, 0.12);
}

.ca-search-clear {
  position: absolute;
  right: 12px;
  background: none;
  border: none;
  color: #94a3b8;
  cursor: pointer;
  padding: 4px;
  display: none;
}

.ca-search-clear:hover {
  color: var(--ca-text);
}

/* Filter Pills */
.ca-pills-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.ca-pill {
  padding: 7px 14px;
  border-radius: 20px;
  border: 1px solid var(--ca-border);
  background: #ffffff;
  color: var(--ca-text-muted);
  font-size: 12.5px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.ca-pill:hover {
  background: #f8fafc;
  color: var(--ca-text);
}

.ca-pill.active {
  background: var(--ca-primary);
  color: #ffffff;
  border-color: var(--ca-primary);
  box-shadow: 0 2px 8px rgba(71, 16, 235, 0.25);
}

.ca-print-btn {
  padding: 8px 14px;
  border-radius: 10px;
  border: 1px solid var(--ca-border);
  background: #ffffff;
  color: var(--ca-text);
  font-size: 12.5px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.ca-print-btn:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
}

/* Student Attendance List */
.ca-student-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ca-student-card {
  background: var(--ca-card-bg);
  border: 1px solid var(--ca-border);
  border-radius: 16px;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
  transition: all 0.2s ease;
}

.ca-student-card:hover {
  border-color: #cbd5e1;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
}

.ca-student-card.is-absent {
  border-left: 4px solid var(--ca-danger);
  background: #fafafa;
}

.ca-student-card.is-present {
  border-left: 4px solid var(--ca-success);
}

.ca-student-card.is-late {
  border-left: 4px solid var(--ca-warning);
}

.ca-student-info {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
  flex: 1 1 240px;
}

.ca-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #e2e8f0;
  color: var(--ca-primary);
  font-weight: 800;
  font-size: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
  border: 2px solid #ffffff;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

.ca-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ca-student-details {
  min-width: 0;
}

.ca-student-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--ca-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ca-student-meta {
  font-size: 12px;
  color: var(--ca-text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 3px;
  flex-wrap: wrap;
}

.ca-type-tag {
  font-size: 10.5px;
  padding: 1px 7px;
  border-radius: 12px;
  background: #f1f5f9;
  color: #475569;
  font-weight: 600;
}

/* Time & Status Column */
.ca-status-col {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  flex-shrink: 0;
}

.ca-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 11.5px;
  font-weight: 700;
}

.ca-status-badge.present {
  background: var(--ca-success-light);
  color: #065f46;
}

.ca-status-badge.late {
  background: var(--ca-warning-light);
  color: #92400e;
}

.ca-status-badge.absent {
  background: var(--ca-danger-light);
  color: #991b1b;
}

.ca-time-text {
  font-size: 12px;
  color: var(--ca-text-muted);
  font-weight: 600;
}

.ca-comment-text {
  font-size: 11px;
  color: #d97706;
  max-width: 220px;
  text-align: right;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ca-action-btn {
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--ca-border);
  background: #ffffff;
  color: var(--ca-primary);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.ca-action-btn:hover {
  background: var(--ca-primary-light);
  border-color: #c7d2fe;
}

/* Empty & Loading States */
.ca-empty-state {
  text-align: center;
  padding: 48px 20px;
  background: #ffffff;
  border: 1px dashed var(--ca-border);
  border-radius: 16px;
  color: var(--ca-text-muted);
}

.ca-empty-icon {
  font-size: 40px;
  color: #cbd5e1;
  margin-bottom: 12px;
}

.ca-empty-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ca-text);
  margin: 0 0 6px;
}

.ca-empty-desc {
  font-size: 13px;
  margin: 0;
}

/* Student History Modal */
.ca-modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  z-index: 5000;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.ca-modal-dialog {
  background: #ffffff;
  border-radius: 20px;
  width: 100%;
  max-width: 520px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  animation: caModalSlideUp 0.25s ease-out;
}

@keyframes caModalSlideUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.ca-modal-header {
  padding: 18px 20px;
  border-bottom: 1px solid var(--ca-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.ca-modal-title {
  margin: 0;
  font-size: 16px;
  font-weight: 800;
  color: var(--ca-text);
}

.ca-modal-close {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--ca-border);
  background: #f8fafc;
  color: var(--ca-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ca-modal-close:hover {
  background: #e2e8f0;
  color: var(--ca-text);
}

.ca-modal-body {
  padding: 18px 20px;
  overflow-y: auto;
}

.ca-history-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ca-history-item {
  padding: 10px 14px;
  background: #f8fafc;
  border: 1px solid var(--ca-border);
  border-radius: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Print Styles */
@media print {
  body * {
    visibility: hidden;
  }
  #class-attendance-tab, #class-attendance-tab * {
    visibility: visible;
  }
  #class-attendance-tab {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    margin: 0;
    padding: 0;
  }
  .ca-toolbar, .ca-filter-bar, .ca-action-btn, .tab-navigation, .app-header {
    display: none !important;
  }
  .ca-header-card {
    background: #ffffff !important;
    color: #000000 !important;
    border: 1px solid #ccc;
    box-shadow: none !important;
  }
  .ca-student-card {
    box-shadow: none !important;
    border: 1px solid #ccc !important;
    break-inside: avoid;
  }
}