:root{--bg:#f7f9fb;--card:#fff;--accent:#4f46e5;--text:#0f172a}
*{box-sizing:border-box}
body{font-family:Inter,system-ui,Segoe UI,Roboto,'Noto Sans KR',sans-serif;background:var(--bg);color:var(--text);margin:0;padding:24px}
.container{max-width:760px;margin:0 auto}
h1{margin-bottom:16px}
.card{background:var(--card);padding:16px;border-radius:8px;box-shadow:0 1px 3px rgba(16,24,40,.05);margin-bottom:16px}
label{display:block;margin-bottom:8px;font-weight:600}
textarea,input,select{width:100%;padding:8px;border:1px solid #e6e9ef;border-radius:6px;margin-top:6px}
button{background:var(--accent);color:#fff;padding:10px 14px;border:0;border-radius:6px;cursor:pointer}
.result{margin-top:12px;color:#0b1220}
.overlay{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;padding:20px;background:rgba(0,0,0,0.6);color:#fff;font-size:18px}
.hidden{display:none}