:root{--brand:#0f172a;--text:#111827;--muted:#6b7280;--bg:#f8fafc;--card:#ffffff;}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,'Helvetica Neue',Arial,'Noto Sans',sans-serif;color:var(--text);background:var(--bg);}
a{color:#0ea5e9;text-decoration:none}
a:hover{text-decoration:underline}
header.site{background:var(--brand);color:#fff;padding:10px 0}
header .wrap{max-width:960px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 12px}
header nav a{color:#fff;margin-right:12px;font-size:14px}
main.content{max-width:960px;margin:16px auto;padding:0 12px}
.card{background:var(--card);border:1px solid #e5e7eb;border-radius:12px;padding:16px;margin-bottom:14px;box-shadow:0 1px 0 rgba(0,0,0,.02)}
.muted{color:var(--muted)}
.btn{display:inline-block;background:#111827;color:#fff;padding:8px 12px;border-radius:10px;border:1px solid #0b1220}
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}
.tool-item{display:block;border:1px solid #e5e7eb;border-radius:10px;padding:12px;background:#fff}
.tool-item h3{margin:.2rem 0 .1rem 0;font-size:16px}
.tool-item p{margin:0;color:var(--muted);font-size:13px}
footer.site{max-width:960px;margin:16px auto;padding:12px;color:var(--muted);font-size:13px}
.tool-form .form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px}
.field label{display:block;font-size:13px;margin-bottom:6px}
.field input,.field select{width:100%;padding:8px 10px;border:1px solid #d1d5db;border-radius:8px}
.results{margin-top:10px;padding:12px;border-radius:10px;background:#f1f5f9;border:1px solid #e2e8f0}
table{width:100%;border-collapse:collapse}
th,td{border-bottom:1px solid #e5e7eb;padding:8px;text-align:right}
th:first-child,td:first-child{text-align:left}
.breadcrumbs{font-size:13px;color:var(--muted);margin:4px 0 10px}
.sep{margin:0 6px}
.hide{display:none}