*{box-sizing:border-box}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:#f8fafc;color:#0f172a;margin:0;line-height:1.65}header{background:#fff;color:#0f172a;position:sticky;top:0;z-index:50;border-bottom:1px solid #e2e8f0;box-shadow:0 1px 8px rgba(15,23,42,.06)}header a{color:#334155;text-decoration:none}.topbar{display:none}.nav{max-width:1080px;margin:0 auto;padding:13px 16px;display:flex;gap:16px;flex-wrap:wrap;align-items:center;justify-content:space-between}.logo{font-weight:800;font-size:20px;color:#0f172a}.logomark{display:inline-block;background:#2563eb;color:#fff;border-radius:8px;padding:2px 8px;margin-right:7px}.brandby{font-size:12px;color:#64748b;font-weight:400}nav a{margin-right:16px;font-size:15px}nav a:hover{color:#2563eb}.cta{background:#2563eb;color:#fff!important;padding:9px 18px;border-radius:999px;font-weight:700;white-space:nowrap}.cta:hover{background:#1d4ed8}main{max-width:1080px;margin:0 auto;padding:26px 16px 44px;background:#fff}h1{font-size:32px;line-height:1.25}h2{margin-top:32px}.sub{color:#475569;font-size:18px}.card{background:#f8fafc;border:1px solid #e2e8f0;border-radius:14px;padding:20px;margin:18px 0}label{font-weight:700;display:block;margin:14px 0 6px}select,input,textarea{width:100%;padding:11px;border:2px solid #cbd5e1;border-radius:10px;font-size:16px;background:#fff}button{border:0;border-radius:999px;padding:12px 20px;font-size:16px;cursor:pointer;background:#2563eb;color:#fff;margin:12px 8px 0 0}button.secondary{background:#fff;color:#0f172a;border:2px solid #cbd5e1}.grid3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}.result{margin-top:16px;background:#fff;border:1px solid #bfdbfe;border-radius:10px;padding:14px}.out{padding:11px;background:#f8fafc;border:1px solid #e2e8f0;border-radius:10px}.small{color:#475569;font-size:14px}table{width:100%;border-collapse:collapse;margin:14px 0}th,td{border-bottom:1px solid #e2e8f0;padding:9px;text-align:left;vertical-align:top}footer{background:#0f172a;color:#e2e8f0}footer a{color:#cbd5e1;text-decoration:none}.foot{max-width:1080px;margin:0 auto;padding:28px 16px}.footgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:20px}.swatch{width:36px;height:36px;border-radius:50%;border:2px solid #cbd5e1;cursor:pointer;padding:0;margin:8px 6px 0 0}.swatch.active{border-color:#2563eb;outline:2px solid #bfdbfe}.pill{border:2px solid #cbd5e1;background:#fff;color:#0f172a;padding:9px 16px;border-radius:999px;cursor:pointer;margin:8px 6px 0 0}.pill.active{background:#0f172a;color:#fff;border-color:#0f172a}.sheet{background:#fff;border:1px solid #e2e8f0;border-radius:10px;padding:28px 44px 20px;box-shadow:0 4px 18px rgba(15,23,42,.07);overflow:hidden}.hwline{height:var(--lh,38px);border-bottom:1px solid #93c5fd;display:flex;align-items:flex-end;padding-bottom:3px;overflow:hidden;white-space:nowrap}.hwline.plain{border-bottom-color:transparent}.sheetfoot{text-align:center;font-size:13px;color:#64748b;margin-top:14px}.pagenav{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:14px 0}.pagenav button{margin:0}.badge{display:inline-block;background:#eff6ff;border:1px solid #bfdbfe;border-radius:999px;padding:4px 12px;font-size:14px}
@media(max-width:700px){.grid3,.grid2,.footgrid{grid-template-columns:1fr}h1{font-size:26px}.sheet{padding:24px 20px 16px}.cta{display:none}}
@media print{header,footer,.card,.pagenav,.noprint{display:none!important}main{max-width:none;padding:0}.sheet{box-shadow:none;border:1px solid #e2e8f0;page-break-after:always}}

/* UX polish — 2026-10-28, per UX_DESIGN_GUIDE.md */
.hero{background:linear-gradient(180deg,#eff6ff,#ffffff);border:1px solid #dbeafe;border-radius:16px;padding:28px 24px;margin:8px 0 20px}
.hero h1{margin:0 0 8px}.hero .sub{margin:0;font-size:19px}
.featuregrid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:18px 0}
.featuregrid div{background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:14px;font-weight:600;font-size:15px}
.featuregrid small{display:block;color:#64748b;font-weight:400;font-size:13px;margin-top:2px}
.toolcard{background:#fff;border:2px solid #dbeafe;border-radius:16px;box-shadow:0 8px 24px rgba(15,23,42,.07);padding:24px}
button{min-height:48px;font-weight:700}button:hover{background:#1d4ed8}button.secondary:hover{background:#f1f5f9}
select,input,textarea{padding:13px}select:focus,input:focus,textarea:focus{outline:none;border-color:#2563eb;box-shadow:0 0 0 3px #dbeafe}
.result{font-size:17px}.result b{font-size:20px}
h2{margin-top:36px;font-size:22px}main{padding-top:20px}
nav a{padding:8px 4px}nav a:hover{color:#2563eb}
.sheet{box-shadow:0 8px 24px rgba(15,23,42,.08)}
@media(max-width:700px){.featuregrid{grid-template-columns:1fr 1fr}.hero{padding:22px 18px}.toolcard{padding:18px}.cta{display:inline-block;padding:8px 14px;font-size:14px}nav a{font-size:14px}}