.app{min-height:100vh;padding:1.5rem;max-width:32rem;margin:0 auto;display:flex;flex-direction:column}.loading{margin:auto;font-size:1.125rem;color:#a0a0a0}.header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;font-size:1.875rem;color:#b0b0b0}.header .score{font-weight:600}.main{flex:1}.question{font-size:2.5rem;font-weight:700;margin:0 0 1.5rem;line-height:1.3}.options{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.75rem}.options .option{display:block;width:100%;padding:2rem 1.75rem;font-size:1.6rem;text-align:left;color:#e8e8e8;background:#2d2d2d;border:2px solid transparent;border-radius:8px;cursor:pointer;transition:background .15s,border-color .15s}.options .option:hover:not(:disabled){background:#3a3a3a}.options .option:disabled{cursor:default}.options .option.correct{background:#1b3d1b;border-color:#2e7d32}.options .option.wrong{background:#4a2020;border-color:#c62828}.btn{margin-top:1.5rem;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;background:#2563eb;color:#fff;border:none;border-radius:8px;cursor:pointer}.btn:hover{background:#3b82f6}.btn.btn-next{width:100%}.result{margin:auto;text-align:center}.result h1{font-size:1.75rem;margin-bottom:1rem}.result .score{font-size:1.25rem;margin-bottom:1.5rem;color:#d0d0d0}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,sans-serif;-webkit-font-smoothing:antialiased;background:#1a1a1a;color:#e8e8e8;font-size:16px}#root{min-height:100vh}