:root{--bg:#f7f8fa;--card:#fff;--accent:#1a73e8;--text:#222}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,'Hiragino Kaku Gothic ProN',Meiryo,Arial;background:var(--bg);color:var(--text);display:flex;align-items:center;justify-content:center;padding:24px}
.card{width:100%;max-width:520px;background:var(--card);padding:24px;border-radius:10px;box-shadow:0 6px 18px rgba(20,20,30,.06)}
h1{margin-top:0;font-size:1.25rem}
label{display:block;margin:12px 0}
input[type=text],select{width:100%;padding:10px;border:1px solid #ddd;border-radius:6px}
button{background:var(--accent);color:#fff;padding:10px 14px;border-radius:8px;border:none;cursor:pointer}
button[disabled]{opacity:.6;cursor:not-allowed}
#status{margin-top:12px;color:#0b6}