:root{font-family:Inter,system-ui,sans-serif;color:#111827;background:#f6f7fb}*{box-sizing:border-box}body{margin:0;background:#f6f7fb}button,input,textarea,select{font:inherit}.app-shell{max-width:900px;margin:0 auto;padding:16px}.topbar{display:flex;justify-content:space-between;align-items:center}.nav{display:flex;gap:12px;margin:12px 0 20px}.nav a{text-decoration:none;color:#374151;font-weight:600}.nav a.active{color:#2563eb}.page{display:flex;flex-direction:column;gap:16px}.card,.test-card{background:#fff;border:1px solid #dbe2f0;border-radius:14px;padding:16px}.stack{display:flex;flex-direction:column;gap:12px}.test-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:12px}.test-card{width:100%;text-align:left;cursor:pointer}.question-block{display:flex;flex-direction:column;gap:12px}.question-head{display:flex;justify-content:space-between;align-items:center;gap:12px}.option-row{display:flex;gap:8px;align-items:flex-start}.actions-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.timer-box{align-self:flex-start;background:#eff6ff;border:1px solid #bfdbfe;border-radius:999px;padding:6px 10px;color:#1d4ed8}.option-row input[type=text],.option-row input[type=radio],.option-row input[type=checkbox]{width:auto}input,textarea,select{width:100%;padding:10px 12px;border:1px solid #cbd5e1;border-radius:10px}textarea{min-height:80px}button{border:none;border-radius:10px;background:#e5e7eb;padding:10px 14px;cursor:pointer}button.primary{background:#2563eb;color:#fff}button.secondary{background:#dbeafe;color:#1d4ed8}.muted{color:#6b7280}.error{color:#b91c1c}.progress-track{height:12px;background:#dbeafe;border-radius:999px;overflow:hidden}.progress-fill{height:100%;background:#2563eb}.option{display:grid;grid-template-columns:auto 1fr;align-items:flex-start;gap:10px;width:100%;padding:12px;border:1px solid #d1d5db;border-radius:10px}.option input{margin-top:3px}.option span{word-break:break-word;line-height:1.35}.option.selected{border-color:#2563eb;background:#eff6ff}.badge{margin-left:8px;font-size:12px;background:#e0f2fe;color:#0c4a6e;border-radius:999px;padding:2px 8px}