:root{--bg:#f6f8ff;--card:#fff;--muted:#6b7280;--accent:#0b5fff}
*{box-sizing:border-box}
body{font-family:Inter,system-ui,Segoe UI,Roboto,Arial,sans-serif;margin:0;background:var(--bg);color:#0f172a}
.container{max-width:900px;margin:28px auto;padding:16px}
header h1{margin:0 0 6px;font-size:1.6rem}
.lede{margin:0 0 12px;color:var(--muted)}
.card{background:var(--card);padding:16px;border-radius:10px;box-shadow:0 1px 2px rgba(16,24,40,.04);margin-bottom:14px}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
label{display:flex;flex-direction:column;font-size:0.95rem}
input,select{padding:8px;border:1px solid #e6edf7;border-radius:6px;margin-top:8px}
.results{display:flex;flex-direction:column;gap:8px;font-size:1.05rem}
.muted{color:var(--muted)}
.mutedBtn{background:transparent;border:1px solid #e6edf7;padding:8px 12px;border-radius:8px;color:var(--muted);cursor:pointer;margin-top:12px}
.hidden{display:none}
.about p{margin:6px 0}
.footer{text-align:center;margin-top:8px;color:var(--muted)}

@media (max-width:640px){.grid{grid-template-columns:1fr}.container{padding:12px}}