:root{--primary:#472170;--primary-shadow:#47217026;--bg:#f8fafc;--card:#fff;--border:#0000001a;--border-strong:#0000002e;--muted:#f1f5f9;--muted-fg:#64748b;--fg:#0f172a;--fg-secondary:#475569;--green-bg:#f0fdf4;--green-text:#16a34a;--green-border:#bbf7d0;--red-bg:#fef2f2;--red-text:#dc2626;--red-border:#fecaca;--yellow-bg:#fefce8;--yellow-text:#ca8a04;--yellow-border:#fef08a}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--fg);padding:32px 24px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:14px;line-height:1.5}.shell{grid-template-columns:1fr 1fr;gap:20px;max-width:900px;margin:0 auto;display:grid}.card{background:var(--card);border:.5px solid var(--border);border-radius:16px;padding:24px}.card-title{color:var(--primary);align-items:center;gap:8px;margin-bottom:20px;font-size:15px;font-weight:700;display:flex}.card-title svg{flex-shrink:0}.form-row{margin-bottom:14px}.form-row label{color:var(--fg);letter-spacing:.01em;margin-bottom:5px;font-size:12px;font-weight:600;display:block}.form-row input,.form-row select{border:.5px solid var(--border-strong);width:100%;color:var(--fg);background:#fff;border-radius:8px;outline:none;padding:9px 12px;font-size:13px;transition:border-color .15s,box-shadow .15s}.form-row input:focus,.form-row select:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-shadow)}.form-row select{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='%2364748b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-position:right 12px center;background-repeat:no-repeat;padding-right:32px}.divider{border:none;border-top:.5px solid var(--border);margin:18px 0}.row-split{grid-template-columns:80px 1fr;align-items:end;gap:10px;margin-bottom:14px;display:grid}.row-split .form-row{margin:0}.btn{cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;gap:6px;padding:9px 14px;font-family:inherit;font-size:13px;font-weight:600;transition:background .15s,box-shadow .15s,opacity .15s;display:inline-flex}.btn:disabled{opacity:.7;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff;box-shadow:0 2px 8px var(--primary-shadow);border-radius:10px;width:100%;margin-top:4px;padding:13px;font-size:14px}.btn-primary:hover:not(:disabled){background:#5a2d8e}.btn-outline{color:var(--primary);border:.5px solid var(--border-strong);background:#fff;height:38px}.btn-outline:hover:not(:disabled){background:var(--muted)}.btn-ghost-danger{color:var(--muted-fg);cursor:pointer;background:0 0;border:none;border-radius:6px;padding:4px 6px;transition:color .12s,background .12s}.btn-ghost-danger:hover{background:var(--red-bg);color:var(--red-text)}.cart-table{border-collapse:collapse;width:100%;margin:14px 0 16px}.cart-table th{text-transform:uppercase;color:var(--muted-fg);border-top:.5px solid var(--border);border-bottom:.5px solid var(--border);text-align:left;background:var(--muted);padding:8px 10px;font-size:10px;font-weight:700}.cart-table td{border-bottom:.5px solid var(--border);color:var(--fg-secondary);padding:9px 10px;font-size:13px}.cart-table td.item-name{color:var(--fg);font-weight:500}.qty-badge{background:var(--muted);color:var(--muted-fg);border-radius:5px;padding:2px 8px;font-size:12px;font-weight:600;display:inline-block}.cart-empty{text-align:center;color:var(--muted-fg);padding:20px 0;font-size:13px;font-style:italic}.order-card{background:var(--card);border:.5px solid var(--border);border-radius:12px;margin-bottom:10px;padding:14px 16px}.order-header{justify-content:space-between;align-items:flex-start;margin-bottom:10px;display:flex}.order-student{color:var(--fg);font-size:13px;font-weight:600}.order-email{color:var(--muted-fg);margin-top:2px;font-family:monospace;font-size:11px}.order-items{color:var(--muted-fg);margin-bottom:8px;font-size:12px}.badge{white-space:nowrap;border:.5px solid;border-radius:6px;align-items:center;gap:4px;padding:3px 10px;font-size:11px;font-weight:600;display:inline-flex}.badge-pending{background:var(--yellow-bg);color:var(--yellow-text);border-color:var(--yellow-border)}.badge-paid{background:var(--green-bg);color:var(--green-text);border-color:var(--green-border)}.badge-expired{background:var(--red-bg);color:var(--red-text);border-color:var(--red-border)}.order-link-row{align-items:center;gap:8px;display:flex}.link-pill{background:var(--muted);color:var(--muted-fg);text-overflow:ellipsis;white-space:nowrap;border-radius:6px;flex:1;padding:6px 10px;font-family:monospace;font-size:11px;overflow:hidden}.btn-copy{border:.5px solid var(--border-strong);cursor:pointer;color:var(--primary);background:#fff;border-radius:6px;padding:6px 10px;font-size:11px;font-weight:600;transition:background .12s,color .12s}.btn-copy:hover{background:var(--muted)}.autocomplete-wrapper{position:relative}.autocomplete-list{border:.5px solid var(--border-strong);z-index:100;background:#fff;border-radius:8px;max-height:220px;padding:4px;list-style:none;position:absolute;top:calc(100% + 4px);left:0;right:0;overflow-y:auto;box-shadow:0 4px 16px #00000014}.autocomplete-list li{cursor:pointer;color:var(--fg);border-radius:6px;flex-direction:column;gap:2px;padding:8px 10px;display:flex}.autocomplete-list li:hover{background:var(--muted)}.student-name{font-size:13px;font-weight:500}.student-id{color:var(--muted-fg);font-family:monospace;font-size:11px}.modal-overlay{z-index:1000;background:#0006;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.modal-card{background:#fff;border-radius:16px;width:100%;max-width:400px;padding:28px;box-shadow:0 8px 32px #00000026}.modal-title{color:var(--primary);align-items:center;gap:8px;margin-bottom:16px;font-size:15px;font-weight:700;display:flex}.modal-row{border-bottom:.5px solid var(--border);color:var(--fg-secondary);justify-content:space-between;padding:6px 0;font-size:13px;display:flex}.modal-total{color:var(--fg);justify-content:space-between;padding:12px 0 0;font-size:15px;font-weight:700;display:flex}.modal-actions{gap:10px;margin-top:20px;display:flex}.modal-actions .btn-primary{flex:1;margin:0}.modal-actions .btn-outline{flex:none;padding:12px 16px}.toast{color:#fff;z-index:9999;background:#472170;border-radius:10px;max-width:320px;padding:12px 18px;font-size:13px;font-weight:600;transition:opacity .3s;position:fixed;bottom:24px;right:24px;box-shadow:0 4px 16px #47217040}@keyframes spin{to{transform:rotate(360deg)}}.spinner{animation:1s linear infinite spin}@media (width<=640px){.shell{grid-template-columns:1fr}}.tabs-container{gap:10px;max-width:900px;margin:0 auto 20px;display:flex}.tab-btn{cursor:pointer;background:var(--muted);color:var(--muted-fg);border:none;border-radius:8px;padding:10px 18px;font-family:inherit;font-size:13px;font-weight:600;transition:all .2s}.tab-btn.active{background:var(--primary);color:#fff;box-shadow:0 2px 8px var(--primary-shadow)}.tab-btn:hover:not(.active){background:#e2e8f0}.history-card{background:var(--card);border:.5px solid var(--border);border-radius:16px;max-width:900px;margin:0 auto;padding:24px;overflow-x:auto}.history-table{border-collapse:collapse;text-align:left;width:100%}.history-table th{text-transform:uppercase;letter-spacing:.05em;color:var(--muted-fg);border-bottom:1px solid var(--border-strong);white-space:nowrap;padding:12px 10px;font-size:11px;font-weight:700}.history-table td{border-bottom:.5px solid var(--border);color:var(--fg);vertical-align:middle;padding:14px 10px;font-size:13px}.history-table tr:hover td{background-color:var(--bg)}.history-table tr.clickable-row{cursor:pointer;transition:background-color .15s}.history-table tr.clickable-row:hover td{background-color:var(--muted)}.expanded-row td{background-color:var(--bg);border-bottom:1px solid var(--border-strong)!important;padding:0!important}.sub-table-container{border-left:3px solid var(--primary);background:#fafafa;padding:16px 24px 16px 42px}.sub-table{border-collapse:collapse;width:100%;font-size:12px}.sub-table th{text-transform:uppercase;color:var(--muted-fg);border-bottom:.5px solid var(--border);padding:6px 10px;font-size:10px}.sub-table td{color:var(--fg-secondary);border-bottom:.5px solid var(--border);padding:8px 10px}.chevron{vertical-align:middle;color:var(--muted-fg);margin-right:8px;transition:transform .2s}.chevron.open{color:var(--primary);transform:rotate(90deg)}