:root{--bg: #fafafa;--surface: #ffffff;--text: #1a1a1a;--text-secondary: #666666;--border: #e0e0e0;--primary: #6750a4;--primary-light: #e8def8;--green: #4caf50;--yellow: #ff9800;--red: #f44336}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}.container{max-width:1200px;margin:0 auto;padding:24px}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:16px}.card-clickable{cursor:pointer;transition:box-shadow .2s}.card-clickable:hover{box-shadow:0 2px 8px #0000001a}h1{font-size:28px;margin-bottom:24px}h2{font-size:22px;margin-bottom:16px}h3{font-size:18px;margin-bottom:12px}.header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid var(--border)}.back-link{color:var(--primary);text-decoration:none;font-weight:500}.back-link:hover{text-decoration:underline}.btn{display:inline-block;padding:10px 24px;border:none;border-radius:20px;font-size:14px;font-weight:500;cursor:pointer;transition:opacity .2s}.btn:hover{opacity:.9}.btn-primary{background:var(--primary);color:#fff}.btn-outline{background:transparent;color:var(--primary);border:1px solid var(--primary)}.stat-row{display:flex;justify-content:space-between;align-items:center;padding:8px 0}.stat-label{color:var(--text-secondary);font-size:14px}.stat-value{font-weight:600}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}.badge{display:inline-block;padding:2px 10px;border-radius:12px;font-size:12px;font-weight:500}.badge-green{background:#e8f5e9;color:#2e7d32}.badge-yellow{background:#fff3e0;color:#e65100}.badge-red{background:#ffebee;color:#c62828}.empty-state{text-align:center;padding:48px 24px;color:var(--text-secondary)}.loading{text-align:center;padding:48px;color:var(--text-secondary)}.session-group-header{font-size:14px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin-top:24px;margin-bottom:8px}.session-row{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid var(--border);cursor:pointer}.session-row:hover{background:var(--bg)}.attempt-row{display:grid;grid-template-columns:1fr 1fr 1fr 100px;gap:8px;padding:10px 0;border-bottom:1px solid var(--border);font-size:14px}.attempt-header{font-weight:600;color:var(--text-secondary)}.btn-small{padding:6px 14px;font-size:13px}.btn-danger{background:var(--red);color:#fff}.btn:disabled{opacity:.5;cursor:not-allowed}.card-header-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.card-header-row h1,.card-header-row h2{margin-bottom:0}.inline-form{display:flex;gap:8px;align-items:center}.form-field{margin-bottom:16px}.form-field label{display:block;font-size:14px;font-weight:500;margin-bottom:4px;color:var(--text-secondary)}.form-field input[type=text]{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit}.form-field input[type=text]:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-light)}input[type=text]{padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit}input[type=text]:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-light)}.pin-field{display:flex;gap:8px;align-items:center}.pin-field input{width:80px;font-family:monospace;font-size:18px;text-align:center;letter-spacing:4px}.form-fieldset{border:1px solid var(--border);border-radius:8px;padding:16px;margin-bottom:16px}.form-fieldset legend{font-size:14px;font-weight:500;color:var(--text-secondary);padding:0 6px}.toggle-label{display:flex;align-items:center;gap:8px;padding:6px 0;font-size:14px;cursor:pointer}.toggle-label input[type=checkbox]{width:18px;height:18px;accent-color:var(--primary)}.form-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:16px}.form-card{background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:16px;margin:12px 0}.text-secondary{color:var(--text-secondary);font-size:14px}.student-row{border-bottom:1px solid var(--border);padding:12px 0}.student-row:last-child{border-bottom:none}.student-row-content{display:flex;align-items:center;justify-content:space-between}.student-info{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.student-name{font-weight:500}.student-badges{display:flex;gap:4px}.badge-sen{background:var(--primary-light);color:var(--primary)}.student-actions{display:flex;gap:6px}.student-form{max-width:400px}.bulk-textarea{width:100%;padding:12px;border:1px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit;resize:vertical}.bulk-textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-light)}.pin-sheet-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:100}.pin-sheet{background:var(--surface);border-radius:12px;padding:24px;max-width:500px;width:90%;max-height:80vh;overflow-y:auto}.pin-sheet-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.pin-sheet-header h2{margin-bottom:0}.pin-sheet-title{text-align:center;margin-bottom:16px}.pin-table{width:100%;border-collapse:collapse}.pin-table th,.pin-table td{padding:10px 16px;border-bottom:1px solid var(--border);text-align:left}.pin-table th{font-size:13px;color:var(--text-secondary);font-weight:600}.pin-value{font-family:monospace;font-size:18px;letter-spacing:4px;font-weight:600}.error-banner{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-radius:8px;margin-bottom:16px;font-size:14px;font-weight:500}.error-banner-quota{background:#fff3e0;color:#e65100;border:1px solid #ffcc80}.error-banner-generic{background:#ffebee;color:#c62828;border:1px solid #ef9a9a}.error-banner-dismiss{background:none;border:none;color:inherit;font-weight:600;cursor:pointer;padding:4px 8px;border-radius:4px;font-size:13px;flex-shrink:0;margin-left:12px}.error-banner-dismiss:hover{opacity:.7}@media print{body *{visibility:hidden}.pin-sheet-content,.pin-sheet-content *{visibility:visible}.pin-sheet-content{position:absolute;left:0;top:0;width:100%}.pin-sheet-overlay{position:static;background:none}.pin-sheet{box-shadow:none;border-radius:0;max-height:none;max-width:none;width:100%}.no-print{display:none!important}.pin-table th,.pin-table td{border-bottom:1px solid #000}.pin-value{font-size:20px}}