:root{--bg:#f4f6fb;--primary:#4f46e5;--primary-dark:#3730a3;--primary-light:#eef2ff;--primary-mid:#c7d2fe;--success:#059669;--success-light:#ecfdf5;--success-mid:#a7f3d0;--danger:#dc2626;--danger-light:#fef2f2;--text:#0f172a;--text-2:#475569;--text-3:#94a3b8;--border-2:#cbd5e1;--sh-xs:0 1px 3px #0f172a12;--sh-sm:0 4px 14px #0f172a17;--sh-md:0 8px 28px #0f172a1c;--r-sm:8px;--r:12px;--r-md:16px;--r-lg:20px;--r-xl:24px;--ease:180ms ease;font-family:DM Sans,Inter,system-ui,sans-serif}body{background:#f4f6fb;color:var(--text)}.app-shell{display:flex;flex-direction:column;min-height:100vh}.topbar{background:#fff;background:var(--surface);border-bottom:1.5px solid #e2e8f0;border-bottom:1.5px solid var(--border);box-shadow:0 1px 3px #0f172a12;box-shadow:var(--sh-xs);gap:20px;height:60px;justify-content:space-between;padding:0 32px;position:sticky;top:0;z-index:50}.topbar,.topbar-brand{align-items:center;display:flex}.topbar-brand{color:#0f172a;color:var(--text);font-size:16px;font-weight:800;gap:10px;letter-spacing:-.03em}.topbar-brand-icon{background:#4f46e5;background:var(--primary);border-radius:8px;border-radius:var(--r-sm);color:#fff;display:grid;height:34px;place-items:center;width:34px}.topbar-right{align-items:center;display:flex;gap:12px}.backend-pill{align-items:center;background:#f4f6fb;background:var(--bg);border:1.5px solid #cbd5e1;border:1.5px solid var(--border-2);border-radius:999px;color:#475569;color:var(--text-2);display:inline-flex;font-size:12px;font-weight:600;gap:6px;height:28px;padding:0 12px}.backend-pill.ok{background:#ecfdf5;background:var(--success-light);border-color:#a7f3d0;border-color:var(--success-mid);color:#059669;color:var(--success)}.backend-pill.err{background:#fef2f2;background:var(--danger-light);border-color:#fecaca;color:#dc2626;color:var(--danger)}.status-dot{background:currentColor;border-radius:50%;height:7px;width:7px}.status-dot.pulse{animation:pulse 1.6s infinite}.wizard-outer{flex:1 1;flex-direction:column;gap:28px;padding:36px 24px 60px}.step-track,.wizard-outer{align-items:center;display:flex}.step-track{gap:0;width:min(600px,100%)}.step-node{align-items:center;background:none;border:none;cursor:pointer;display:flex;flex:1 1;flex-direction:column;gap:6px;padding:0;position:relative}.step-node:disabled{cursor:not-allowed}.step-bubble{background:#fff;background:var(--surface);border:2px solid #cbd5e1;border:2px solid var(--border-2);border-radius:50%;color:#94a3b8;color:var(--text-3);display:grid;font-size:13px;font-weight:800;height:38px;place-items:center;position:relative;transition:all .18s ease;transition:all var(--ease);width:38px;z-index:1}.step-node.active .step-bubble{background:#4f46e5;background:var(--primary);border-color:#4f46e5;border-color:var(--primary);box-shadow:0 0 0 5px #eef2ff;box-shadow:0 0 0 5px var(--primary-light);color:#fff}.step-node.done .step-bubble{background:#059669;background:var(--success);border-color:#059669;border-color:var(--success);color:#fff}.step-label{color:#94a3b8;color:var(--text-3);font-size:11px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;white-space:nowrap}.step-node.active .step-label{color:#4f46e5;color:var(--primary)}.step-node.done .step-label{color:#059669;color:var(--success)}.step-connector{background:#e2e8f0;background:var(--border);flex:1 1;height:2px;margin-bottom:22px;overflow:hidden;position:relative}.step-connector-fill{background:#059669;background:var(--success);bottom:0;left:0;position:absolute;top:0;transition:width .3s ease}.wizard-card{background:#fff;background:var(--surface);border:1.5px solid #e2e8f0;border:1.5px solid var(--border);border-radius:24px;border-radius:var(--r-xl);box-shadow:0 4px 14px #0f172a17;box-shadow:var(--sh-sm);overflow:hidden;width:min(820px,100%)}.wizard-card-header{align-items:flex-start;border-bottom:1px solid #e2e8f0;border-bottom:1px solid var(--border);display:flex;gap:16px;justify-content:space-between;padding:28px 32px 20px}.wizard-card-header-left{align-items:center;display:flex;gap:16px}.wizard-step-badge{background:#4f46e5;background:var(--primary);border-radius:12px;border-radius:var(--r);box-shadow:0 4px 12px #4f46e54d;color:#fff;display:grid;flex-shrink:0;font-size:14px;font-weight:800;height:46px;letter-spacing:.04em;place-items:center;width:46px}.wizard-step-badge.done{background:#059669;background:var(--success);box-shadow:0 4px 12px #0596694d}.wizard-card-title{color:#0f172a;color:var(--text);font-size:20px;font-weight:800;letter-spacing:-.025em}.wizard-card-subtitle{color:#475569;color:var(--text-2);font-size:14px;margin-top:3px}.wizard-card-body{grid-gap:22px;display:grid;gap:22px;padding:28px 32px}.wizard-card-footer{align-items:center;background:#f4f6fb;background:var(--bg);border-top:1px solid #e2e8f0;border-top:1px solid var(--border);display:flex;gap:12px;justify-content:space-between;padding:20px 32px}.template-scroll{grid-gap:16px;display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}.template-option{background:#fff;background:var(--surface);border:2px solid #e2e8f0;border:2px solid var(--border);border-radius:20px;border-radius:var(--r-lg);cursor:pointer;overflow:hidden;padding:0;position:relative;text-align:left;transition:all .18s ease;transition:all var(--ease)}.template-option:hover{border-color:#c7d2fe;border-color:var(--primary-mid);box-shadow:0 8px 28px #0f172a1c;box-shadow:var(--sh-md);transform:translateY(-2px)}.template-option.chosen{border-color:#4f46e5;border-color:var(--primary);box-shadow:0 0 0 3px #eef2ff,0 8px 28px #0f172a1c;box-shadow:0 0 0 3px var(--primary-light),var(--sh-md)}.tpl-preview{align-items:center;aspect-ratio:3/2;background:#eef2ff;background:var(--primary-light);display:flex;justify-content:center;overflow:hidden;position:relative;width:100%}.tpl-preview img{display:block;height:100%;object-fit:cover;width:100%}.tpl-preview-fallback{align-items:center;color:#4f46e5;color:var(--primary);display:flex;flex-direction:column;gap:8px;justify-content:center;padding:24px;text-align:center}.tpl-preview-fallback .tpl-icon{background:#4f46e5;background:var(--primary);border-radius:12px;border-radius:var(--r);color:#fff;display:grid;height:52px;place-items:center;width:52px}.tpl-preview-fallback .tpl-school-name{color:#475569;color:var(--text-2);font-size:13px;font-weight:700;line-height:1.4}.tpl-preview-badge{align-items:center;background:#fff;background:var(--surface);border:1.5px solid #cbd5e1;border:1.5px solid var(--border-2);border-radius:999px;color:#475569;color:var(--text-2);display:inline-flex;font-size:11px;font-weight:700;height:24px;padding:0 10px;position:absolute;right:10px;top:10px}.template-option.chosen .tpl-preview-badge{background:#ecfdf5;background:var(--success-light);border-color:#a7f3d0;border-color:var(--success-mid);color:#059669;color:var(--success)}.tpl-info{grid-gap:6px;display:grid;gap:6px;padding:14px 16px 16px}.tpl-name{align-items:center;color:#0f172a;color:var(--text);display:flex;font-size:16px;font-weight:800;gap:8px;justify-content:space-between;letter-spacing:-.02em}.tpl-school{color:#94a3b8;color:var(--text-3);font-size:12px;font-weight:500}.tpl-desc{color:#475569;color:var(--text-2);font-size:13px;line-height:1.5}.tpl-checkmark{background:#059669;background:var(--success);border-radius:50%;color:#fff;display:grid;flex-shrink:0;height:24px;place-items:center;width:24px}.source-tabs{background:#f4f6fb;background:var(--bg);border:1.5px solid #e2e8f0;border:1.5px solid var(--border);border-radius:16px;border-radius:var(--r-md);display:flex;gap:8px;padding:4px;width:fit-content}.source-tab{align-items:center;background:#0000;border:none;border-radius:12px;border-radius:var(--r);color:#475569;color:var(--text-2);cursor:pointer;display:inline-flex;font-size:13px;font-weight:600;gap:7px;height:36px;padding:0 16px;transition:all .18s ease;transition:all var(--ease)}.source-tab.active{background:#fff;background:var(--surface);box-shadow:0 1px 3px #0f172a12;box-shadow:var(--sh-xs);color:#4f46e5;color:var(--primary)}.dropzone{align-items:center;background:#f4f6fb;background:var(--bg);border:2px dashed #cbd5e1;border:2px dashed var(--border-2);border-radius:20px;border-radius:var(--r-lg);cursor:pointer;display:flex;flex-direction:column;gap:10px;justify-content:center;min-height:180px;padding:36px 24px;text-align:center;transition:all .18s ease;transition:all var(--ease)}.dropzone.drag-over,.dropzone:hover{background:#eef2ff;background:var(--primary-light);border-color:#4f46e5;border-color:var(--primary)}.dropzone.uploading{opacity:.8;pointer-events:none}.dropzone-icon{background:#eef2ff;background:var(--primary-light);border:1.5px solid #c7d2fe;border:1.5px solid var(--primary-mid);border-radius:12px;border-radius:var(--r);color:#4f46e5;color:var(--primary);display:grid;height:48px;place-items:center;width:48px}.dropzone-title{color:#0f172a;color:var(--text);font-size:15px;font-weight:700}.dropzone-sub{color:#94a3b8;color:var(--text-3);font-size:13px}.api-panel{grid-gap:14px;display:grid;gap:14px}.api-row{align-items:flex-end;display:flex;flex-wrap:wrap;gap:10px}.api-hint{color:#94a3b8;color:var(--text-3);font-size:12px;gap:7px}.api-hint,.load-success{align-items:center;display:flex}.load-success{background:#ecfdf5;background:var(--success-light);border:1.5px solid #a7f3d0;border:1.5px solid var(--success-mid);border-radius:16px;border-radius:var(--r-md);gap:14px;padding:16px 20px}.load-success-icon{background:#059669;background:var(--success);border-radius:8px;border-radius:var(--r-sm);color:#fff;display:grid;flex-shrink:0;height:40px;place-items:center;width:40px}.load-success strong{color:#0f172a;color:var(--text);font-size:14px;font-weight:700}.load-success p{color:#475569;color:var(--text-2);font-size:13px;margin-top:2px}.gen-hero{align-items:center;background:#eef2ff;background:var(--primary-light);border:1.5px solid #c7d2fe;border:1.5px solid var(--primary-mid);border-radius:20px;border-radius:var(--r-lg);display:flex;flex-wrap:wrap;gap:20px;justify-content:space-between;padding:22px}.gen-hero h3{color:#0f172a;color:var(--text);font-size:17px;font-weight:800;letter-spacing:-.025em}.gen-hero p{color:#475569;color:var(--text-2);font-size:13px;margin-top:4px}.gen-actions{flex-shrink:0}.gen-actions,.tools-row{display:flex;flex-wrap:wrap;gap:10px}.search-field,.tools-row{align-items:center}.search-field{background:#fff;background:var(--surface);border:1.5px solid #cbd5e1;border:1.5px solid var(--border-2);border-radius:12px;border-radius:var(--r);color:#94a3b8;color:var(--text-3);display:flex;flex:1 1;gap:8px;height:38px;min-width:180px;padding:0 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var(--primary-mid);border-radius:8px;border-radius:var(--r-sm);color:#4f46e5;color:var(--primary);display:grid;flex-shrink:0;height:36px;place-items:center;width:36px}.class-name{color:#0f172a;color:var(--text);font-size:14px;font-weight:700}.class-count{color:#475569;color:var(--text-2);font-size:12px}.class-actions{grid-gap:6px;display:grid;gap:6px;grid-template-columns:1fr 1fr}.advanced-panel{grid-gap:16px;background:#f4f6fb;background:var(--bg);border:1.5px solid #e2e8f0;border:1.5px solid var(--border);border-radius:20px;border-radius:var(--r-lg);display:grid;gap:16px;padding:20px}.advanced-title{color:#0f172a;color:var(--text);font-size:14px;font-weight:700}.advanced-sub{color:#475569;color:var(--text-2);font-size:13px}.student-row{grid-gap:12px;display:grid;gap:12px;grid-template-columns:1fr 1fr}.status-banner{align-items:center;background:#eef2ff;background:var(--primary-light);border:1.5px solid #c7d2fe;border:1.5px solid var(--primary-mid);border-radius:12px;border-radius:var(--r);color:#4f46e5;color:var(--primary);display:flex;font-size:13px;font-weight:500;gap:10px;padding:12px 16px}.form-group{grid-gap:6px;display:grid;gap:6px}.form-label{color:#94a3b8;color:var(--text-3);font-size:12px;font-weight:700;letter-spacing:.05em;text-transform:uppercase}.custom-select{position:relative}.custom-select select{appearance:none;background:#fff;background:var(--surface);border:1.5px solid #cbd5e1;border:1.5px solid var(--border-2);border-radius:12px;border-radius:var(--r);color:#0f172a;color:var(--text);cursor:pointer;font-size:14px;height:40px;padding:0 36px 0 12px;transition:border-color .18s ease;transition:border-color var(--ease);width:100%}.custom-select select:focus{border-color:#4f46e5;border-color:var(--primary);box-shadow:0 0 0 3px #eef2ff;box-shadow:0 0 0 3px var(--primary-light);outline:none}.custom-select.disabled select{cursor:not-allowed;opacity:.5}.select-arrow{color:#94a3b8;color:var(--text-3);pointer-events:none;position:absolute;right:10px;top:50%;transform:translateY(-50%)}.btn{align-items:center;border:1.5px solid #0000;border-radius:12px;border-radius:var(--r);cursor:pointer;display:inline-flex;font-size:14px;font-weight:600;gap:7px;min-height:40px;padding:0 18px;text-decoration:none;transition:all .18s ease;transition:all var(--ease);white-space:nowrap}.btn:hover{transform:translateY(-1px)}.btn:active{transform:translateY(0)}.btn:disabled{cursor:not-allowed;opacity:.5;transform:none}.btn-primary{background:#4f46e5;background:var(--primary);border-color:#3730a3;border-color:var(--primary-dark);box-shadow:0 2px 6px #4f46e547;color:#fff}.btn-primary:hover:not(:disabled){background:#3730a3;background:var(--primary-dark);box-shadow:0 4px 12px #4f46e561}.btn-secondary{background:#fff;background:var(--surface);border-color:#cbd5e1;border-color:var(--border-2);box-shadow:0 1px 3px #0f172a12;box-shadow:var(--sh-xs);color:#0f172a;color:var(--text)}.btn-secondary:hover:not(:disabled){border-color:#4f46e5;border-color:var(--primary);color:#4f46e5;color:var(--primary)}.btn-ghost{background:#0000;border-color:#0000;color:#475569;color:var(--text-2)}.btn-ghost:hover:not(:disabled){background:#f4f6fb;background:var(--bg);color:#0f172a;color:var(--text)}.btn-icon{justify-content:center;min-height:38px;padding:0;width:38px}.btn-lg{border-radius:16px;border-radius:var(--r-md);font-size:15px;min-height:46px;padding:0 22px}.btn-sm{border-radius:8px;border-radius:var(--r-sm);font-size:13px;min-height:32px;padding:0 12px}.btn-spinner{animation:spin .7s linear infinite;border:2px solid;border-radius:50%;border-right:2px solid #0000;flex-shrink:0;height:14px;width:14px}.modal-overlay{animation:fadeBg .2s 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20px}.modal-title{font-size:15px;font-weight:700}.modal-actions,.modal-title{align-items:center;display:flex;gap:8px}.modal-body{overflow:hidden}.pdf-iframe{background:#f4f6fb;background:var(--bg);border:0;display:block;min-height:72vh;width:100%}.toast-container{grid-gap:8px;display:grid;gap:8px;position:fixed;right:18px;top:18px;width:min(340px,calc(100% - 36px));z-index:110}.toast{align-items:center;animation:toastIn .26s ease;background:#fff;background:var(--surface);border:1.5px solid #cbd5e1;border:1.5px solid var(--border-2);border-radius:16px;border-radius:var(--r-md);box-shadow:0 8px 28px #0f172a1c;box-shadow:var(--sh-md);display:flex;gap:10px;padding:12px 14px}.toast-success{background:#ecfdf5;background:var(--success-light);border-color:#059669;border-color:var(--success)}.toast-error{background:#fef2f2;background:var(--danger-light);border-color:#dc2626;border-color:var(--danger)}.toast-info{background:#eef2ff;background:var(--primary-light);border-color:#c7d2fe;border-color:var(--primary-mid)}.toast-icon{border-radius:8px;border-radius:var(--r-sm);display:grid;flex-shrink:0;height:30px;place-items:center;width:30px}.toast-success .toast-icon{background:#a7f3d0;background:var(--success-mid);color:#059669;color:var(--success)}.toast-error .toast-icon{background:#fee2e2;color:#dc2626;color:var(--danger)}.toast-info .toast-icon{background:#c7d2fe;background:var(--primary-mid);color:#4f46e5;color:var(--primary)}.toast-copy{color:#0f172a;color:var(--text);flex:1 1;font-size:13px;font-weight:500}.toast-close{background:#0000;border:0;border-radius:8px;border-radius:var(--r-sm);color:#94a3b8;color:var(--text-3);cursor:pointer;padding:2px;transition:background .18s ease;transition:background var(--ease)}.toast-close:hover{background:#0f172a0f}.toast-out{animation:toastOut .26s ease forwards}.empty-state{font-size:14px;grid-column:1/-1;padding:32px;text-align:center}.empty-icon,.empty-state{color:#94a3b8;color:var(--text-3)}.empty-icon{background:#f4f6fb;background:var(--bg);border:1.5px solid #e2e8f0;border:1.5px solid var(--border);border-radius:12px;border-radius:var(--r);display:grid;height:44px;margin:0 auto 10px;place-items:center;width:44px}code{background:#f1f5f9;border:1px solid #cbd5e1;border:1px solid var(--border-2);border-radius:8px;border-radius:var(--r-sm);font-size:12px;padding:2px 7px;word-break:break-word}.spin-icon{animation:spin .9s linear infinite}.loading-dots{display:inline-flex;gap:3px;margin-left:4px}.loading-dots 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