@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";:root{--primary: #4f7cff;--primary-dark: #3b63db;--primary-light: #eef2ff;--accent: #06c;--success: #10b981;--warning: #f59e0b;--danger: #ef4444;--bg: #f5f7fb;--surface: #ffffff;--border: #e5e7eb;--text: #111827;--text-secondary: #6b7280;--sidebar-w: 220px;--radius: 12px;--shadow: 0 1px 4px rgba(0, 0, 0, .08);--shadow-md: 0 4px 16px rgba(0, 0, 0, .1)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,-apple-system,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased}.layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-w);background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:100}.sidebar-logo{padding:20px 16px 16px;font-size:16px;font-weight:700;color:var(--primary);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:8px}.sidebar-nav{flex:1;padding:12px 0;overflow-y:auto}.nav-item{display:flex;align-items:center;gap:10px;padding:10px 16px;margin:2px 8px;border-radius:8px;font-size:14px;font-weight:500;color:var(--text-secondary);cursor:pointer;text-decoration:none;transition:all .15s ease;border:none;background:none;width:calc(100% - 16px);text-align:left}.nav-item:hover{background:var(--bg);color:var(--text)}.nav-item.active{background:var(--primary-light);color:var(--primary)}.nav-more-section{margin-top:8px;border-top:1px solid var(--border);padding-top:8px}.nav-more-toggle{display:flex;align-items:center;gap:8px;padding:8px 16px;margin:2px 8px;border-radius:8px;font-size:13px;font-weight:500;color:var(--text-secondary);cursor:pointer;background:none;border:none;width:calc(100% - 16px);text-align:left;transition:all .15s ease}.nav-more-toggle:hover{background:var(--bg);color:var(--text)}.nav-more-badge{margin-left:auto;font-size:10px;font-weight:600;padding:2px 7px;border-radius:100px;background:#fff7ed;color:#c2410c;letter-spacing:.02em}.nav-more-items{animation:slideDown .15s ease}@keyframes slideDown{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}.nav-item-secondary{padding-left:24px;font-size:13px}.sidebar-footer{padding:16px;border-top:1px solid var(--border);font-size:13px;color:var(--text-secondary)}.main-content{margin-left:var(--sidebar-w);flex:1;padding:28px;max-width:100%}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}.page-title{font-size:20px;font-weight:700;color:var(--text)}.card{background:var(--surface);border-radius:var(--radius);border:1px solid var(--border);box-shadow:var(--shadow)}.card-body{padding:20px}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;border:none;transition:all .15s ease;text-decoration:none;line-height:1.4}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-dark)}.btn-ghost{background:none;color:var(--text-secondary);border:1px solid var(--border)}.btn-ghost:hover:not(:disabled){background:var(--bg);color:var(--text)}.btn-danger{background:#fee2e2;color:var(--danger)}.btn-danger:hover:not(:disabled){background:#fecaca}.btn-success{background:#d1fae5;color:var(--success)}.btn-sm{padding:4px 10px;font-size:12px;border-radius:6px}.btn-icon{padding:6px;border-radius:8px;background:none;border:1px solid var(--border);cursor:pointer;color:var(--text-secondary);transition:all .15s}.btn-icon:hover{background:var(--bg)}.form-group{margin-bottom:16px}.form-label{display:block;font-size:13px;font-weight:500;color:var(--text);margin-bottom:6px}.form-label .required{color:var(--danger);margin-left:2px}.form-control{width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit;background:var(--surface);color:var(--text);transition:border-color .15s;outline:none}.form-control:focus{border-color:var(--primary);box-shadow:0 0 0 3px #4f7cff1f}.form-control::placeholder{color:var(--text-secondary)}select.form-control{-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:32px}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}.form-row-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse}th,td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--border)}th{font-size:12px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;background:var(--bg)}tr:last-child td{border-bottom:none}tbody tr:nth-child(2n) td{background:#fafafa}tr:hover td{background:#f1f5f9}.td-actions{display:flex;gap:8px}.badge{display:inline-flex;align-items:center;padding:2px 8px;border-radius:100px;font-size:12px;font-weight:500}.badge-blue{background:var(--primary-light);color:var(--primary)}.badge-green{background:#d1fae5;color:#065f46}.badge-orange{background:#fff7ed;color:#c2410c}.badge-gray{background:var(--bg);color:var(--text-secondary)}.badge-red{background:#fee2e2;color:var(--danger)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000059;z-index:1000;display:flex;align-items:center;justify-content:center;padding:16px;animation:fadeIn .15s ease}.modal{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow-md);width:100%;max-width:520px;max-height:90vh;overflow-y:auto;animation:slideUp .2s ease}.modal-header{padding:20px 24px 0;font-size:16px;font-weight:700;display:flex;align-items:center;justify-content:space-between}.modal-body{padding:20px 24px}.modal-footer{padding:0 24px 20px;display:flex;justify-content:flex-end;gap:10px}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(24px);opacity:0}to{transform:translateY(0);opacity:1}}.alert{padding:10px 14px;border-radius:8px;font-size:13px;margin-bottom:14px}.alert-warning{background:#fffbeb;border:1px solid #fde68a;color:#92400e}.alert-error{background:#fee2e2;border:1px solid #fca5a5;color:#991b1b}.alert-success{background:#d1fae5;border:1px solid #6ee7b7;color:#065f46}.alert-info{background:var(--primary-light);border:1px solid #c7d7ff;color:#1d4ed8}.empty-state{text-align:center;padding:60px 20px;color:var(--text-secondary)}.empty-state-icon{font-size:40px;margin-bottom:12px}.divider{height:1px;background:var(--border);margin:16px 0}.text-right{text-align:right}.text-secondary{color:var(--text-secondary)}.font-bold{font-weight:700}.mt-12{margin-top:12px}.mt-16{margin-top:16px}.flex{display:flex}.flex-center{display:flex;align-items:center}.gap-8{gap:8px}.gap-12{gap:12px}.flex-1{flex:1}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#eef2ff,#e0e7ff)}.login-card{background:#fff;border-radius:18px;box-shadow:var(--shadow-md);padding:44px 40px;width:380px}.login-logo{text-align:center;margin-bottom:28px}.login-logo h1{font-size:22px;font-weight:800;color:var(--primary);margin-top:8px}.login-logo p{color:var(--text-secondary);font-size:13px}.student-picker{border:1px solid var(--border);border-radius:8px;overflow:hidden}.student-picker-search{padding:8px;border-bottom:1px solid var(--border)}.student-picker-list{max-height:200px;overflow-y:auto}.student-picker-item{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;cursor:pointer;transition:background .1s;border-bottom:1px solid var(--border)}.student-picker-item:last-child{border-bottom:none}.student-picker-item:hover{background:var(--bg)}.student-picker-item.selected{background:var(--primary-light)}.student-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}.student-tag{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:100px;background:var(--primary-light);color:var(--primary);font-size:12px;font-weight:500}.student-tag-remove{cursor:pointer;line-height:1;margin-left:2px}.autocomplete{position:relative}.autocomplete-dropdown{position:absolute;top:calc(100% + 4px);left:0;right:0;background:var(--surface);border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow-md);z-index:200;max-height:200px;overflow-y:auto}.autocomplete-item{padding:8px 12px;cursor:pointer;font-size:14px}.autocomplete-item:hover{background:var(--bg)}.autocomplete-item.selected{background:var(--primary-light);color:var(--primary)}.billing-summary-card{padding:16px 20px}.billing-total{font-size:28px;font-weight:800;color:var(--primary)}.billing-label{font-size:13px;color:var(--text-secondary)}.receipt{background:#fff;border:1px solid var(--border);border-radius:10px;padding:24px;font-size:14px}.receipt h3{font-size:16px;font-weight:700;margin-bottom:4px}.receipt-items td{padding:6px 8px}.receipt-items tr:last-child td{border-top:1px solid var(--border);font-weight:700}.message-box{width:100%;min-height:140px;background:#f9fafb;border:1px solid var(--border);border-radius:8px;padding:12px;font-family:inherit;font-size:14px;resize:vertical;outline:none}.tab-bar{display:flex;gap:4px;border-bottom:1px solid var(--border);margin-bottom:20px}.tab{padding:8px 16px;font-size:14px;font-weight:500;color:var(--text-secondary);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px}.tab.active{color:var(--primary);border-bottom-color:var(--primary)}.student-price-row{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;border:1px solid var(--border);border-radius:8px;margin-bottom:8px;background:var(--bg)}.student-price-input{width:100px}.spinner{display:inline-block;width:20px;height:20px;border:2.5px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .65s linear infinite;flex-shrink:0}.spinner-sm{width:14px;height:14px;border-width:2px}.spinner-lg{width:36px;height:36px;border-width:3px}@keyframes spin{to{transform:rotate(360deg)}}.table-loading-wrap{position:relative}.table-loading-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#ffffffbf;display:flex;align-items:center;justify-content:center;z-index:10;border-radius:0 0 var(--radius) var(--radius)}.pagination{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-top:1px solid var(--border);gap:12px;flex-wrap:wrap}.pagination-info{font-size:13px;color:var(--text-secondary)}.pagination-controls{display:flex;align-items:center;gap:4px}.page-btn{min-width:32px;height:32px;padding:0 8px;border-radius:6px;border:1px solid var(--border);background:var(--surface);font-size:13px;cursor:pointer;color:var(--text);display:inline-flex;align-items:center;justify-content:center;transition:all .12s}.page-btn:hover:not(:disabled){background:var(--bg);border-color:var(--primary);color:var(--primary)}.page-btn.active{background:var(--primary);color:#fff;border-color:var(--primary);font-weight:600}.page-btn:disabled{opacity:.4;cursor:not-allowed}.page-size-select{height:32px;font-size:13px;border:1px solid var(--border);border-radius:6px;padding:0 28px 0 8px;background:var(--surface);cursor:pointer;outline:none}