:root{--primary-color:#4a90e2;--secondary-color:#50c878;--danger-color:#e74c3c;--warning-color:#f39c12;--text-color:#333;--bg-color:#f5f7fa;--white:#fff;--border-color:#e1e8ed;--shadow:0 2px 8px rgba(0,0,0,.1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue","Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic",YuGothic,Meiryo,sans-serif;background-color:var(--bg-color);color:var(--text-color);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.container{max-width:100%;padding:20px;min-height:100vh}.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,var(--primary-color) 0%,#667eea 100%)}.login-box{background:var(--white);padding:40px 30px;border-radius:16px;box-shadow:0 10px 40px rgba(0,0,0,.2);width:100%;max-width:400px}.logo{text-align:center;margin-bottom:30px}.logo h1{font-size:28px;color:var(--primary-color);margin-bottom:8px}.logo p{font-size:14px;color:#666}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;font-weight:600;font-size:14px;color:var(--text-color)}.form-group input,.form-group select,.form-group textarea{width:100%;padding:14px 16px;border:2px solid var(--border-color);border-radius:8px;font-size:16px;transition:border-color .3s;-webkit-appearance:none;appearance:none}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--primary-color)}.form-group textarea{resize:vertical;min-height:100px}.btn{display:inline-block;padding:14px 24px;border:none;border-radius:8px;font-size:16px;font-weight:600;text-align:center;cursor:pointer;transition:all .3s;text-decoration:none;-webkit-tap-highlight-color:transparent}.btn-primary{background-color:var(--primary-color);color:var(--white)}.btn-primary:active{background-color:#3a7bc8;transform:scale(.98)}.btn-secondary{background-color:var(--secondary-color);color:var(--white)}.btn-secondary:active{background-color:#40b868;transform:scale(.98)}.btn-danger{background-color:var(--danger-color);color:var(--white)}.btn-danger:active{background-color:#c0392b;transform:scale(.98)}.btn-block{width:100%;display:block}.btn-sm{padding:8px 16px;font-size:14px}.header{background:var(--white);padding:16px 20px;box-shadow:var(--shadow);position:sticky;top:0;z-index:100;display:flex;justify-content:space-between;align-items:center}.header h1{font-size:20px;color:var(--primary-color)}.header .user-info{font-size:14px;color:#666}.card{background:var(--white);border-radius:12px;padding:20px;margin-bottom:16px;box-shadow:var(--shadow)}.card-header{font-size:18px;font-weight:600;margin-bottom:16px;padding-bottom:12px;border-bottom:2px solid var(--border-color)}.lesson-list{list-style:none}.lesson-item{padding:16px;border-bottom:1px solid var(--border-color);cursor:pointer;transition:background-color .2s}.lesson-item:last-child{border-bottom:none}.lesson-item:active{background-color:#f8f9fa}.lesson-title{font-size:16px;font-weight:600;margin-bottom:8px;color:var(--text-color)}.lesson-info{font-size:14px;color:#666;display:flex;gap:12px;flex-wrap:wrap}.lesson-info span{display:inline-flex;align-items:center;gap:4px}.student-list{list-style:none}.student-item{display:flex;justify-content:space-between;align-items:center;padding:12px;border-bottom:1px solid var(--border-color)}.student-item:last-child{border-bottom:none}.student-name{font-size:16px;font-weight:500}.student-item.attended{background-color:#e8f5e9}.ticket-selector{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:16px}.ticket-option{padding:16px;border:2px solid var(--border-color);border-radius:8px;text-align:center;cursor:pointer;transition:all .3s;font-weight:600}.ticket-option:active{transform:scale(.95)}.ticket-option.selected{border-color:var(--primary-color);background-color:#e3f2fd;color:var(--primary-color)}.error-message{background-color:#ffebee;color:var(--danger-color);padding:12px 16px;border-radius:8px;margin-bottom:16px;font-size:14px}.success-message{background-color:#e8f5e9;color:var(--secondary-color);padding:12px 16px;border-radius:8px;margin-bottom:16px;font-size:14px}.modal{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background-color:rgba(0,0,0,.5);z-index:1000;align-items:center;justify-content:center}.modal.active{display:flex}.modal-content{background:var(--white);border-radius:16px;padding:24px;max-width:90%;max-height:80vh;overflow-y:auto;box-shadow:0 10px 40px rgba(0,0,0,.3)}.modal-header{font-size:20px;font-weight:600;margin-bottom:20px;padding-bottom:12px;border-bottom:2px solid var(--border-color)}.modal-footer{margin-top:20px;display:flex;gap:12px}.loading{text-align:center;padding:40px;color:#666}.spinner{border:3px solid var(--border-color);border-top:3px solid var(--primary-color);border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite;margin:0 auto 16px}@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}.badge{display:inline-block;padding:4px 8px;border-radius:4px;font-size:12px;font-weight:600}.badge-primary{background-color:#e3f2fd;color:var(--primary-color)}.badge-success{background-color:#e8f5e9;color:var(--secondary-color)}.badge-warning{background-color:#fff3e0;color:var(--warning-color)}.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}.text-center{text-align:center}.text-right{text-align:right}@media (min-width:768px){.container{max-width:768px;margin:0 auto}}.student-item.clickable{transition:background-color .2s}.student-item.clickable:hover{background-color:#f0f7ff}.student-item.clickable:active{background-color:#e3f2fd}.admin-page .admin-container{max-width:1200px}.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.stat-item{text-align:center;padding:20px;border-radius:12px;background:#f8f9fa;transition:transform .2s}.stat-item:hover{transform:translateY(-2px)}.stat-value{font-size:28px;font-weight:700;margin-bottom:4px}.stat-label{font-size:14px;color:#666;font-weight:500}.stat-item.blue{background:#e3f2fd;color:#1565c0}.stat-item.blue .stat-value{color:#1565c0}.stat-item.green{background:#e8f5e9;color:#2e7d32}.stat-item.green .stat-value{color:#2e7d32}.stat-item.orange{background:#fff3e0;color:#ef6c00}.stat-item.orange .stat-value{color:#ef6c00}.stat-item.pink{background:#fce4ec;color:#c2185b}.stat-item.pink .stat-value{color:#c2185b}@media (min-width:768px){.admin-layout{display:grid;grid-template-columns:280px 1fr;gap:24px;align-items:start}.admin-sidebar{position:sticky;top:80px}.stat-grid{grid-template-columns:repeat(4,1fr)}}.btn-outline{background:transparent;border:2px solid var(--primary-color);color:var(--primary-color)}.btn-outline:hover{background:var(--primary-color);color:var(--white)}.text-left{text-align:left}