*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;background:#f5f6f8;color:#1a1a2e;min-height:100vh}button{cursor:pointer;font-family:inherit;font-size:.875rem;border:none;border-radius:6px;padding:.5rem 1rem;transition:opacity .15s}button:hover{opacity:.85}button:disabled{opacity:.45;cursor:not-allowed}input{font-family:inherit;font-size:1rem;border:1px solid #d1d5db;border-radius:6px;padding:.5rem .75rem;width:100%;outline:none}input:focus{border-color:#3b82f6;box-shadow:0 0 0 3px #3b82f620}.card{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 1px 3px #0000001a}.btn-primary{background:#3b82f6;color:#fff}.btn-danger{background:#ef4444;color:#fff}.btn-ghost{background:transparent;color:#6b7280;border:1px solid #d1d5db}.score-badge{display:inline-flex;flex-direction:column;align-items:center;background:#f0f4ff;border-radius:10px;padding:.75rem 1.25rem;min-width:100px}.score-badge .label{font-size:.75rem;color:#6b7280;font-weight:500}.score-badge .value{font-size:1.75rem;font-weight:700;color:#1d4ed8}.score-badge.math .value{color:#c2410c}.score-badge.total .value{color:#166534}