body{font-family:Inter, system-ui, Arial; background:#f3f4f6; color:#111; margin:0; padding:20px;}
.container{max-width:980px;margin:0 auto;}
header h1{margin:0 0 12px 0;}
.card{background:white;padding:16px;border-radius:8px;margin:12px 0;box-shadow:0 2px 6px rgba(0,0,0,0.06);}
input{display:block;padding:8px;margin:8px 0;width:100%;box-sizing:border-box;border-radius:6px;border:1px solid #ddd;}
button{padding:10px 12px;border-radius:6px;border:0;background:#0b74ff;color:white;cursor:pointer;}
.small{font-size:13px;color:#444;}
pre{background:#0f1720;color:#e6eef6;padding:8px;border-radius:6px;overflow:auto;max-height:240px;}