:root{--primary:#1a73e8;--primary-hover:#1557b0;--background:#f8f9fa;--surface:#fff;--text-main:#202124;--text-muted:#5f6368;--border:#dadce0;--success:#34a853;--warning:#fbbc04;--danger:#ea4335;--offline:#607d8b;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a;--font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--background);color:var(--text-main);-webkit-font-smoothing:antialiased;line-height:1.5}h1,h2,h3,h4,h5,h6{color:var(--text-main);font-weight:600;line-height:1.2}.text-muted{color:var(--text-muted)}.text-center{text-align:center}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 1rem}.card{background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow-sm);border-radius:8px;padding:1.5rem}.btn{cursor:pointer;border:1px solid #0000;border-radius:6px;justify-content:center;align-items:center;padding:.5rem 1rem;font-family:inherit;font-size:.875rem;font-weight:500;transition:all .2s;display:inline-flex}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-primary{background-color:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background-color:var(--primary-hover)}.btn-outline{border-color:var(--border);color:var(--text-main);background-color:#0000}.btn-outline:hover:not(:disabled){background-color:var(--background)}.exam-layout{flex-direction:column;min-height:100vh;display:flex}.exam-header{background:var(--surface);border-bottom:1px solid var(--border);z-index:10;padding:1rem;position:sticky;top:0}.exam-header-inner{justify-content:space-between;align-items:center;max-width:1200px;margin:0 auto;display:flex}.exam-main{flex:1;gap:1.5rem;width:100%;max-width:1200px;margin:0 auto;padding:1.5rem 1rem;display:flex}.exam-content{flex:1}.question-text{margin-bottom:1.5rem;font-size:1.125rem}.options-list{flex-direction:column;gap:.75rem;display:flex}.option-item{border:1px solid var(--border);cursor:pointer;border-radius:6px;align-items:flex-start;padding:1rem;transition:background-color .2s;display:flex}.option-item:hover{background-color:var(--background)}.option-item.selected{border-color:var(--primary);background-color:#e8f0fe}.option-radio{cursor:pointer;margin-top:.25rem;margin-right:1rem}.exam-nav{flex-shrink:0;width:250px;min-width:0;max-width:100%}.nav-grid{grid-template-columns:repeat(10,minmax(0,1fr));gap:.25rem;margin-top:.5rem;display:grid}@media (width>=769px) and (width<=1024px){.exam-nav{width:220px}.nav-grid{grid-template-columns:repeat(8,minmax(0,1fr))}}.nav-btn{aspect-ratio:1;border:1px solid var(--border);background:var(--surface);cursor:pointer;border-radius:3px;justify-content:center;align-items:center;padding:0;font-size:.75rem;font-weight:600;transition:all .15s;display:flex}.nav-btn:hover{background:var(--background)}.nav-btn.answered{color:#fff;background-color:#16a34a;border-color:#16a34a}.nav-btn.pending{color:#fff;background-color:#ef4444;border-color:#ef4444}.nav-btn.current{border:2px solid #000;font-weight:800}.nav-btn.unsynced{position:relative}.sync-dot{background-color:#ef4444;border:1px solid #fff;border-radius:50%;width:6px;height:6px;position:absolute;top:2px;right:2px}.network-banner{background-color:var(--warning);color:#000;text-align:center;padding:.5rem;font-size:.875rem;font-weight:500}.network-banner.offline{background-color:var(--danger);color:#fff}@media (width<=768px){.exam-main{flex-direction:column}.exam-nav{order:2;width:100%}.exam-content{order:1}}.network-inner.svelte-1fo336k{justify-content:center;align-items:center;max-width:1200px;margin:0 auto;display:flex}.network-banner{z-index:100;position:sticky;top:0}.cache-banner.svelte-1fo336k{background-color:var(--card-bg);color:var(--text-main);border-bottom:1px solid var(--border);z-index:99;padding:.75rem 1rem;position:sticky;top:0}.progress-bar-bg.svelte-1fo336k{background-color:var(--border);border-radius:2px;width:100%;height:4px;overflow:hidden}.progress-bar-fill.svelte-1fo336k{background-color:var(--primary);height:100%;transition:width .3s}