body{font-family:system-ui,sans-serif;max-width:760px;margin:0 auto;padding:24px;color:#1b1b1f;line-height:1.5}
a{color:#5b3bd6}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}
.logo{font-weight:800;text-decoration:none;color:#1b1b1f}form{display:flex;gap:8px}input{flex:1;padding:12px;font-size:16px;border:2px solid #ccc;border-radius:8px}
button,.btn{padding:12px 18px;font-size:16px;border:0;border-radius:8px;background:#5b3bd6;color:#fff;cursor:pointer;text-decoration:none;display:inline-block}
.btn.alt{background:#222}.score{font-size:56px;font-weight:800}.fail{color:#b3261e}.pass{color:#1e7b34}
li{margin:6px 0}.small{font-size:13px;color:#666}footer{margin-top:48px;font-size:13px;color:#666}pre{background:#f4f4f6;padding:12px;overflow:auto}
.todo{background:#fff3cd;padding:4px 8px;border-radius:4px;font-size:12px}