.attendance-section {color: #333; line-height: 1.6; }
.attendance-container { }
.check-in-section { text-align: center; margin: 30px 0; padding: 0; }
.calendar-section h3 { font-size: 22px; font-weight: 700; margin-bottom: 25px; color: #333; text-align: center; display: flex; align-items: center; justify-content: center; gap: 8px; white-space: nowrap; }
.calendar-header { display: flex; justify-content: center; align-items: center; margin-bottom: 30px; }
.calendar-nav { display: flex; align-items: center; gap: 20px; }
.current-month { font-size: 20px; font-weight: 700; color: #333; min-width: 180px; text-align: center; }
.calendar { width: 100%; border-collapse: collapse; margin-bottom: 20px; font-size: 16px; border-radius: 8px; overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,0.1); }
.calendar th, .calendar td { width: 14.28%; height: 60px; text-align: center; vertical-align: middle; border: 1px solid #e9ecef; position: relative; }
.calendar th { background: #f8f9fa; font-weight: 700; color: #495057; font-size: 16px; height: 50px; }
.calendar th:first-child { color: #dc3545; }
.calendar th:last-child { color: #007bff; }
.calendar td { font-size: 16px; font-weight: 500; cursor: pointer; transition: all 0.2s; background: white; }
.calendar td:hover { background: #f8f9fa; }
.calendar td:first-child { color: #dc3545; }
.calendar td:last-child { color: #007bff; }
.calendar .empty-cell { background: #f8f9fa; cursor: default; }
.calendar .empty-cell:hover { background: #f8f9fa; }
.calendar .today { background: white; color: #4361ee; font-weight: 700; font-size: 18px; }
.calendar .attended { background: white; color: #333; font-weight: 500; position: relative; }
.calendar .attended::after { content: '\f00c'; font-family: 'FontAwesome'; position: absolute; bottom: 2px; right: 2px; font-size: 12px; font-weight: normal; color: #37b24d; }
.calendar .today.attended { background: white; color: #4361ee; font-weight: 700; font-size: 18px; }
.calendar td a { color: inherit; text-decoration: none; display: block; width: 100%; height: 100%; line-height: 60px; }
.calendar td a:hover { text-decoration: none; color: inherit; }
.calendar .selected { background: #e3f2fd; color: #1976d2; font-weight: 700; }
.current-month-btn { text-align: center; margin-top: 15px; }
.today-attendance-list { margin-top: 30px; }
.today-attendance-list h5 { font-size: 18px; font-weight: 700; color: #333; margin-bottom: 15px; display: flex; align-items: center; gap: 8px; }
.today-attendance-list .card { border: 1px solid #e9ecef; border-radius: 8px; overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,0.05); }
.na-table-head { background: #f8f9fa; font-weight: 600; color: #495057; border-bottom: 2px solid #dee2e6; }
.na-table-head .d-md-table-cell { padding: 12px 15px; font-size: 14px; }
.today-attendance-list .na-table li { border-bottom: 1px solid #f1f3f4; transition: background-color 0.2s ease; }
.today-attendance-list .na-table li:hover { background-color: #f8f9fa; }
.today-attendance-list .na-table li:last-child { border-bottom: none; }
.today-attendance-list .d-md-table-cell { padding: 12px 15px; font-size: 14px; vertical-align: middle; }
.bottom-buttons { text-align: center; padding: 0 15px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
@keyframes pulse { 0% { transform: scale(1); } 50% { transform: scale(1.05); } 100% { transform: scale(1); } }
.loading { opacity: 0.6; pointer-events: none; }
.loading::after { content: ''; position: absolute; top: 50%; left: 50%; width: 20px; height: 20px; margin: -10px 0 0 -10px; border: 2px solid #f3f3f3; border-top: 2px solid #4361ee; border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

/* 반응형 디자인 */
@media (max-width: 768px) {
  .attendance-container { }
  .check-in-section { padding: 0; margin: 25px 15px 30px; }
  .calendar-section h3 { font-size: 18px; gap: 6px; }
  .calendar th, .calendar td { height: 45px; font-size: 14px; }
  .calendar td a { line-height: 45px; }
  .calendar th { font-size: 14px; height: 40px; }
  .calendar .attended::after { font-size: 10px; bottom: 1px; right: 1px; }
  .calendar .today.attended::after { font-size: 10px; bottom: 1px; right: 1px; }
  .current-month { font-size: 18px; min-width: 140px; }
  .calendar-nav { gap: 15px; }
  .today-attendance-list .na-table li { padding: 8px 0 !important; display: table !important; width: 100%; }
  .today-attendance-list .d-md-table-cell { display: table-cell !important; padding: 8px 4px !important; margin: 0 !important; vertical-align: middle; text-align: center; }
  .today-attendance-list .d-md-table-cell:nth-child(1) { width: 40%; text-align: left; padding-left: 15px !important; }
  .today-attendance-list .d-md-table-cell:nth-child(2) { width: 20%; font-size: 11px; color: #6c757d; }
  .today-attendance-list .d-md-table-cell:nth-child(3) { width: 20%; font-size: 12px; }
  .today-attendance-list .d-md-table-cell:nth-child(4) { width: 20%; font-size: 12px; }
  .today-attendance-list .d-md-none { display: none !important; }
}

@media (max-width: 480px) {
  .attendance-container { }
  .calendar-section h3 { font-size: 16px; gap: 4px; }
  .check-in-section { padding: 0; margin: 20px 10px 25px; }
  .calendar th, .calendar td { height: 40px; font-size: 12px; }
  .calendar td a { line-height: 40px; }
  .calendar th { height: 35px; }
  .calendar .attended::after { font-size: 9px; bottom: 1px; right: 1px; }
  .calendar .today.attended::after { font-size: 9px; bottom: 1px; right: 1px; }
  .current-month { font-size: 16px; min-width: 120px; }
  .today-attendance-list .na-table li { padding: 6px 0 !important; }
  .today-attendance-list .d-md-table-cell:nth-child(2) { font-size: 10px; }
  .today-attendance-list .d-md-table-cell:nth-child(3), .today-attendance-list .d-md-table-cell:nth-child(4) { font-size: 11px; }
}