@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";
*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#f5f5f5;--white:#fff;--brand:#e8440a;--dark:#1a1a1a;--text:#1a1a1a;--text-muted:#6b6b6b;--text-light:#999;--border:#e5e5e5;--border-input:#d8d8d8;--sidebar-w:280px;--header-h:60px;--radius-sm:6px;--radius-md:10px;--radius-lg:14px;--shadow-card:0 1px 3px #00000014, 0 1px 2px #0000000a;--shadow-drop:0 4px 16px #0000001f}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;font-size:14px;line-height:1.5}a{color:inherit;text-decoration:none}button{cursor:pointer;background:0 0;border:none;font-family:inherit;font-size:14px}input,select,textarea{outline:none;font-family:inherit;font-size:14px}.app-shell{min-height:100vh;display:flex}.main-content{margin-left:var(--sidebar-w);flex-direction:column;flex:1;min-height:100vh;display:flex;position:relative}.sidebar{width:var(--sidebar-w);background:var(--white);border-right:1px solid var(--border);z-index:100;flex-direction:column;height:100vh;padding:24px 16px;display:flex;position:fixed;top:0;left:0}.sidebar-logo{align-items:center;gap:10px;margin-bottom:24px;padding:0 4px;display:flex}.logo-icon{background:var(--brand);color:#fff;border-radius:10px;justify-content:center;align-items:center;width:38px;height:38px;font-size:18px;font-weight:700;display:flex}.logo-text{color:var(--text);font-size:20px;font-weight:700}.create-btn{background:var(--dark);color:#fff;border-radius:999px;align-items:center;gap:8px;margin-bottom:28px;padding:11px 16px;font-size:14px;font-weight:600;transition:background .15s;display:flex}.create-btn:hover{background:#333}.sidebar-nav{flex-direction:column;flex:1;gap:2px;display:flex}.nav-item{border-radius:var(--radius-md);color:var(--text-muted);align-items:center;gap:12px;padding:10px 12px;font-size:14px;font-weight:500;transition:all .15s;display:flex;position:relative}.nav-item:hover{color:var(--text);background:#f5f5f5}.nav-item.active{color:var(--text);background:#f0f0f0}.nav-badge{background:var(--brand);color:#fff;text-align:center;border-radius:999px;min-width:22px;margin-left:auto;padding:2px 7px;font-size:11px;font-weight:700}.sidebar-bottom{margin-top:auto}.school-card{border:1px solid var(--border);border-radius:var(--radius-lg);background:#f7f7f7;align-items:center;gap:12px;margin-top:12px;padding:12px 14px;display:flex}.school-avatar{background:#e8440a20;border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;display:flex;position:relative;overflow:hidden}.school-avatar img{object-fit:cover;width:100%;height:100%}.school-avatar-fallback{color:var(--brand);font-size:16px;font-weight:700}.school-name{font-size:13px;font-weight:600}.school-sub{color:var(--text-muted);font-size:12px}.topbar{height:var(--header-h);background:var(--white);border-bottom:1px solid var(--border);z-index:50;justify-content:space-between;align-items:center;padding:0 24px;display:flex;position:sticky;top:0}.topbar-left{color:var(--text-muted);align-items:center;gap:12px;display:flex}.back-btn{width:32px;height:32px;color:var(--text-muted);border-radius:8px;justify-content:center;align-items:center;transition:background .15s;display:flex}.back-btn:hover{color:var(--text);background:#f0f0f0}.topbar-icon{color:var(--text-muted)}.topbar-title{color:var(--text-muted);font-weight:500}.topbar-right{align-items:center;gap:12px;display:flex}.notif-btn{width:36px;height:36px;color:var(--text-muted);border-radius:50%;justify-content:center;align-items:center;transition:background .15s;display:flex;position:relative}.notif-btn:hover{background:#f0f0f0}.notif-dot{background:var(--brand);border:1.5px solid #fff;border-radius:50%;width:7px;height:7px;position:absolute;top:7px;right:8px}.user-btn{border-radius:999px;align-items:center;gap:8px;padding:6px 10px;font-size:14px;font-weight:500;transition:background .15s;display:flex}.user-btn:hover{background:#f0f0f0}.user-avatar{background:#e8440a20;border-radius:50%;justify-content:center;align-items:center;width:30px;height:30px;display:flex;overflow:hidden}.user-avatar img{object-fit:cover;width:100%;height:100%}.user-avatar-fallback{color:var(--brand);font-size:13px;font-weight:700}.page-content{flex:1;padding:24px}.page-heading{align-items:flex-start;gap:12px;margin-bottom:24px;display:flex}.status-dot{border-radius:50%;flex-shrink:0;width:10px;height:10px;margin-top:5px}.status-dot.green{background:#22c55e}.page-title{margin-bottom:2px;font-size:22px;font-weight:700}.page-sub{color:var(--text-muted);font-size:14px}.empty-state{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;padding:80px 24px;display:flex}.empty-illustration{margin-bottom:24px}.empty-title{margin-bottom:12px;font-size:20px;font-weight:700}.empty-desc{color:var(--text-muted);max-width:480px;margin-bottom:32px;font-size:14px;line-height:1.7}.empty-cta{background:var(--dark);color:#fff;border-radius:999px;align-items:center;gap:8px;padding:13px 28px;font-size:15px;font-weight:600;transition:background .15s;display:inline-flex}.empty-cta:hover{background:#333}.list-toolbar{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.filter-btn{border:1px solid var(--border);color:var(--text-muted);background:var(--white);border-radius:999px;align-items:center;gap:6px;padding:8px 16px;font-size:13px;font-weight:500;transition:all .15s;display:flex}.filter-btn:hover{color:var(--text);border-color:#999}.search-wrap{width:320px;position:relative}.search-icon{color:var(--text-light);position:absolute;top:50%;left:14px;transform:translateY(-50%)}.search-input{border:1px solid var(--border);background:var(--white);border-radius:999px;width:100%;padding:10px 16px 10px 38px;font-size:14px}.search-input:focus{border-color:#999}.assignments-grid{grid-template-columns:1fr 1fr;gap:16px;display:grid}.assignment-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);flex-direction:column;justify-content:space-between;min-height:140px;padding:20px;display:flex}.card-header{justify-content:space-between;align-items:flex-start;margin-bottom:12px;display:flex}.card-title{font-size:17px;font-weight:700;line-height:1.3}.card-menu-wrap{position:relative}.card-menu-btn{width:32px;height:32px;color:var(--text-muted);border-radius:8px;justify-content:center;align-items:center;transition:background .15s;display:flex}.card-menu-btn:hover{background:#f0f0f0}.dropdown-menu{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-drop);z-index:10;min-width:160px;position:absolute;top:36px;right:0;overflow:hidden}.dropdown-menu button{text-align:left;width:100%;color:var(--text);padding:11px 16px;font-size:14px;transition:background .1s}.dropdown-menu button:hover{background:#f5f5f5}.dropdown-menu button.danger{color:#dc2626}.card-footer{color:var(--text-muted);border-top:1px solid var(--border);justify-content:space-between;align-items:center;margin-top:auto;padding-top:16px;font-size:13px;display:flex}.card-footer strong{color:var(--text)}.status-badge{border-radius:999px;margin-bottom:8px;padding:3px 10px;font-size:12px;font-weight:600;display:inline-block}.status-queued{color:#92400e;background:#fef3c7}.status-processing{color:#1e40af;background:#dbeafe}.status-completed{color:#065f46;background:#d1fae5}.status-failed{color:#991b1b;background:#fee2e2}.floating-cta{background:var(--dark);color:#fff;z-index:50;border-radius:999px;align-items:center;gap:8px;padding:14px 28px;font-size:15px;font-weight:600;transition:background .15s;display:flex;position:fixed;bottom:28px;left:50%;transform:translate(-50%);box-shadow:0 4px 24px #00000040}.floating-cta:hover{background:#333}.form-page{max-width:820px}.form-progress{background:#e5e5e5;border-radius:999px;height:3px;margin-bottom:28px;overflow:hidden}.form-progress-bar{background:var(--dark);border-radius:999px;width:50%;height:100%}.form-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px}.form-card-header{margin-bottom:24px}.form-section-title{margin-bottom:4px;font-size:18px;font-weight:700}.form-section-sub{color:var(--text-muted);font-size:14px}.upload-caption{text-align:center;color:var(--text-muted);margin:8px 0 24px;font-size:13px}.upload-zone{border:1.5px dashed var(--border-input);border-radius:var(--radius-md);text-align:center;cursor:pointer;background:#fafafa;padding:40px 24px;transition:all .2s}.upload-zone:hover,.upload-zone.dragging{border-color:var(--dark);background:#f5f5f5}.upload-zone.has-file{background:#f0fdf4;border-color:#22c55e}.upload-icon{width:48px;height:48px;color:var(--text-muted);background:#f0f0f0;border-radius:50%;justify-content:center;align-items:center;margin:0 auto 12px;display:flex}.upload-label{margin-bottom:4px;font-size:15px;font-weight:500}.upload-hint{color:var(--text-muted);margin-bottom:16px;font-size:13px}.browse-btn{border:1px solid var(--border-input);border-radius:var(--radius-sm);background:var(--white);padding:8px 20px;font-size:13px;font-weight:500;transition:all .15s;display:inline-block}.browse-btn:hover{background:#f5f5f5;border-color:#999}.upload-filename{margin-bottom:4px;font-size:15px;font-weight:600}.upload-filesize{color:var(--text-muted);margin-bottom:12px;font-size:13px}.upload-remove{border-radius:var(--radius-sm);color:#dc2626;background:#fee2e2;padding:6px 16px;font-size:13px;font-weight:500}.form-field{margin-bottom:20px}.form-field label{color:var(--text);margin-bottom:8px;font-size:13px;font-weight:600;display:block}.optional{color:var(--text-muted);font-weight:400}.form-input{border:1px solid var(--border-input);border-radius:var(--radius-sm);background:var(--white);width:100%;color:var(--text);padding:11px 14px;font-size:14px;transition:border-color .15s}.form-input:focus{border-color:var(--dark)}.form-input.error{border-color:#dc2626}.form-textarea{resize:vertical;min-height:80px}.form-row{grid-template-columns:1fr 1fr;gap:16px;display:grid}.field-error{color:#dc2626;margin-top:4px;font-size:12px;display:block}.qt-header{color:var(--text-muted);grid-template-columns:1fr 140px 100px;gap:12px;margin-left:40px;padding:0 0 8px;font-size:12px;font-weight:600;display:grid}.qt-row{align-items:center;gap:10px;margin-bottom:10px;display:flex}.qt-select{flex:1}.qt-remove{border:1px solid var(--border);width:28px;height:28px;color:var(--text-muted);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;transition:all .15s;display:flex}.qt-remove:hover:not(:disabled){color:#dc2626;background:#fee2e2;border-color:#fca5a5}.qt-remove:disabled{opacity:.3;cursor:not-allowed}.stepper{border:1px solid var(--border-input);border-radius:var(--radius-sm);flex-shrink:0;align-items:center;gap:0;display:flex;overflow:hidden}.stepper button{width:32px;height:36px;color:var(--text-muted);background:#fafafa;justify-content:center;align-items:center;transition:background .15s;display:flex}.stepper button:hover{color:var(--text);background:#f0f0f0}.stepper span{text-align:center;border-left:1px solid var(--border);border-right:1px solid var(--border);width:36px;padding:8px 0;font-size:14px;font-weight:600}.add-qt-btn{color:var(--text-muted);align-items:center;gap:6px;padding:8px 0;font-size:13px;font-weight:500;transition:color .15s;display:inline-flex}.add-qt-btn:hover{color:var(--text)}.submit-error{color:#dc2626;margin-bottom:16px;font-size:13px}.submit-btn{background:var(--dark);color:#fff;border-radius:var(--radius-sm);width:100%;margin-top:8px;padding:14px;font-size:15px;font-weight:600;transition:background .15s}.submit-btn:hover:not(:disabled){background:#333}.submit-btn:disabled{opacity:.6;cursor:not-allowed}.progress-screen{justify-content:center;align-items:center;min-height:60vh;display:flex}.progress-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);text-align:center;width:100%;max-width:480px;box-shadow:var(--shadow-card);padding:48px 40px}.progress-icon{margin-bottom:24px}.progress-title{margin-bottom:8px;font-size:20px;font-weight:700}.progress-message{color:var(--text-muted);margin-bottom:24px;font-size:14px}.progress-bar-track{background:#f0f0f0;border-radius:999px;height:6px;margin-bottom:24px;overflow:hidden}.progress-bar-fill{background:var(--brand);border-radius:999px;height:100%;transition:width .5s}.progress-steps{text-align:left;flex-direction:column;gap:10px;display:flex}.progress-step{color:var(--text-muted);align-items:center;gap:10px;font-size:13px;display:flex}.progress-step.done{color:var(--text)}.step-dot{background:var(--border);border-radius:50%;flex-shrink:0;width:8px;height:8px;transition:background .3s}.progress-step.done .step-dot{background:#22c55e}.progress-error{color:#dc2626;margin-top:16px;font-size:14px}.output-page{flex-direction:column;flex:1;display:flex}.output-banner{background:var(--dark);color:#fff;padding:28px 32px}.banner-text{max-width:780px;margin-bottom:16px;font-size:15px;line-height:1.6}.banner-actions{gap:12px;display:flex}.pdf-btn{color:var(--dark);background:#fff;border-radius:999px;align-items:center;gap:8px;padding:10px 20px;font-size:14px;font-weight:600;transition:background .15s;display:inline-flex}.pdf-btn:hover{background:#f0f0f0}.regen-btn{color:#fff;background:#ffffff26;border-radius:999px;align-items:center;gap:8px;padding:10px 20px;font-size:14px;font-weight:600;transition:background .15s;display:inline-flex}.regen-btn:hover{background:#ffffff40}.nav-disabled{opacity:.4;cursor:not-allowed;pointer-events:none}.paper-card{background:var(--white);border-radius:var(--radius-lg);border:1px solid var(--border);max-width:900px;margin:24px;padding:48px 56px}.paper-header{text-align:center;margin-bottom:32px}.paper-school{margin-bottom:6px;font-size:22px;font-weight:700}.paper-subject{margin-bottom:4px;font-size:16px;font-weight:500}.paper-grade{font-size:16px;font-weight:500}.paper-meta{border-top:1px solid var(--border);border-bottom:1px solid var(--border);justify-content:space-between;margin-bottom:16px;padding:16px 0;font-size:14px;font-weight:600;display:flex}.paper-instruction{margin-bottom:20px;font-size:14px;font-weight:500}.student-info{flex-direction:column;gap:10px;margin-bottom:32px;font-size:14px;font-weight:500;display:flex}.info-line{border-bottom:1.5px solid var(--dark);vertical-align:bottom;width:180px;margin-left:4px;display:inline-block}.info-line.short{width:100px}.paper-section{margin-bottom:36px}.section-title{text-align:center;margin-bottom:6px;font-size:18px;font-weight:700}.section-type-label{margin-bottom:4px;font-size:14px;font-weight:600}.section-instruction{color:var(--text-muted);margin-bottom:20px;font-size:13px;font-style:italic}.questions-list{flex-direction:column;gap:20px;padding-left:20px;list-style:decimal;display:flex}.question-item{font-size:14px;line-height:1.6}.question-row{justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.question-text{flex:1}.question-marks{white-space:nowrap;color:var(--text-muted);font-size:13px;font-weight:600}.diff-badge{vertical-align:middle;border-radius:4px;margin-right:4px;padding:2px 8px;font-size:11px;font-weight:700;display:inline-block}.badge-easy{color:#065f46;background:#d1fae5}.badge-medium{color:#92400e;background:#fef3c7}.badge-hard{color:#991b1b;background:#fee2e2}.options-list{color:var(--text-muted);flex-direction:column;gap:6px;margin:10px 0 0 20px;font-size:14px;display:flex}.option-item::marker{color:var(--text-muted)}.answer-lines{flex-direction:column;gap:10px;margin-top:10px;display:flex}.answer-line{background:#d0d0d0;border-radius:1px;height:1px}.paper-footer{text-align:center;border-top:1px solid var(--border);color:var(--text-muted);padding-top:32px;font-size:13px;font-style:italic}.loading-grid{grid-template-columns:1fr 1fr;gap:16px;display:grid}.card-skeleton{border-radius:var(--radius-lg);background:linear-gradient(90deg,#f0f0f0 25%,#e8e8e8 50%,#f0f0f0 75%) 0 0/200% 100%;height:140px;animation:1.5s infinite shimmer}@keyframes shimmer{to{background-position:-200% 0}}@media print{.sidebar,.topbar,.output-banner,.regen-btn,.pdf-btn{display:none!important}.main-content{margin-left:0}.paper-card{box-shadow:none;border:none;margin:0;padding:24px}}@media (max-width:768px){:root{--sidebar-w:0px}.sidebar{display:none}.assignments-grid,.form-row{grid-template-columns:1fr}.paper-card{margin:12px;padding:24px 20px}.qt-header{display:none}}