*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;margin:0;padding:0}body{color:#0f172a;background-color:#f1f5f9;font-family:Hind Siliguri,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:15px;line-height:1.5}.app-container{background-color:#fff;flex-direction:column;max-width:540px;min-height:100vh;margin:0 auto;display:flex;box-shadow:0 4px 20px -2px #0000000d}.app-header{z-index:40;background-color:#fff;border-bottom:1px solid #e2e8f0;justify-content:space-between;align-items:center;padding:12px 16px;display:flex;position:sticky;top:0}.alias-badge{color:#334155;letter-spacing:.3px;background-color:#f8fafc;border:1px solid #cbd5e1;border-radius:9999px;align-items:center;gap:5px;padding:3px 10px;font-size:12px;font-weight:600;display:inline-flex}.verified-badge{color:#047857;background-color:#ecfdf5;border:1px solid #a7f3d0;border-radius:6px;align-items:center;gap:4px;padding:2px 8px;font-size:11px;font-weight:600;display:inline-flex}.question-card{cursor:pointer;border-bottom:1px solid #f1f5f9;padding:16px;transition:background-color .15s}.question-card:hover{background-color:#f8fafc}.card-meta{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.tag-subject{color:#1d4ed8;background-color:#eff6ff;border-radius:4px;padding:2px 8px;font-size:12px;font-weight:600}.tag-chapter{color:#475569;background-color:#f1f5f9;border-radius:4px;margin-left:6px;padding:2px 8px;font-size:12px}.question-title{color:#0f172a;word-break:break-word;margin-bottom:8px;font-size:16px;font-weight:600;line-height:1.4}.question-footer{color:#64748b;border-top:1px dashed #f1f5f9;justify-content:space-between;align-items:center;margin-top:12px;padding-top:8px;font-size:13px;display:flex}.btn-primary{color:#fff;cursor:pointer;background-color:#2563eb;border:none;border-radius:8px;justify-content:center;align-items:center;gap:6px;padding:10px 16px;font-size:14px;font-weight:600;transition:background-color .15s;display:inline-flex}.btn-primary:hover{background-color:#1d4ed8}.btn-primary:disabled{cursor:not-allowed;background-color:#94a3b8}.btn-secondary{color:#334155;cursor:pointer;background-color:#f8fafc;border:1px solid #cbd5e1;border-radius:8px;justify-content:center;align-items:center;gap:6px;padding:8px 14px;font-size:13px;font-weight:500;display:inline-flex}.btn-secondary:hover{background-color:#f1f5f9}.btn-helpful{color:#475569;cursor:pointer;background-color:#fff;border:1px solid #e2e8f0;border-radius:6px;align-items:center;gap:5px;padding:6px 12px;font-size:13px;font-weight:500;transition:all .15s;display:inline-flex}.btn-helpful.active{color:#1d4ed8;background-color:#eff6ff;border-color:#3b82f6;font-weight:600}.fab-ask{z-index:50;color:#fff;cursor:pointer;background-color:#2563eb;border:none;border-radius:9999px;align-items:center;gap:8px;padding:12px 20px;font-size:15px;font-weight:600;transition:transform .15s;display:flex;position:fixed;bottom:24px;right:max(20px,50% - 240px);box-shadow:0 10px 25px -3px #2563eb66}.fab-ask:active{transform:scale(.95)}.form-input{border:1px solid #cbd5e1;border-radius:8px;outline:none;width:100%;padding:10px 14px;font-family:inherit;font-size:14px;transition:border-color .15s}.form-input:focus{border-color:#2563eb;box-shadow:0 0 0 2px #2563eb26}.filter-bar{background-color:#fff;border-bottom:1px solid #f1f5f9;gap:8px;padding:12px 16px;display:flex}.filter-select{background-color:#fff;border:1px solid #cbd5e1;border-radius:6px;outline:none;flex:1;padding:8px 10px;font-family:inherit;font-size:13px}.similar-box{background-color:#fffbeb;border:1px solid #fef3c7;border-radius:8px;margin-top:12px;padding:12px}.similar-item{cursor:pointer;border-bottom:1px dashed #fde68a;padding:8px 0}.similar-item:last-child{border-bottom:none}.load-more-section{text-align:center;padding:20px 16px}