:root{--pri:#2563eb;--pri-d:#1d4ed8;--pri-l:#eff6ff;--ink:#0f172a;--sub:#64748b;--line:#e5e7eb;--bg:#f4f6fb}
body{font-family:'Pretendard Variable',Pretendard,sans-serif;background:var(--bg);color:var(--ink);margin:0}
a{color:var(--pri);text-decoration:none}
.top{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.top-in{max-width:1080px;margin:0 auto;padding:0 16px;display:flex;align-items:center;gap:22px;height:62px}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:19px;color:var(--ink);white-space:nowrap}
.brand b{color:var(--pri)}
.tabs{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
.tabs a{padding:8px 13px;border-radius:9px;color:#334155;font-weight:600;font-size:14.5px;white-space:nowrap}
.tabs a:hover{background:#f1f5f9}.tabs a.on{background:var(--pri-l);color:var(--pri)}
.hero{background:linear-gradient(120deg,#1e3a8a,#2563eb 60%,#38bdf8);color:#fff}
.hero-in{max-width:1080px;margin:0 auto;padding:34px 16px 64px}
.hero h1{font-size:28px;font-weight:800;margin:0 0 6px}.hero p{opacity:.85;margin:0}
.main{max-width:1080px;margin:-40px auto 40px;padding:0 16px}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:0 6px 24px -12px rgba(15,23,42,.18);margin-bottom:18px}
.form-control{border-radius:10px;padding:.6rem .9rem}
.btn-go{background:var(--pri);color:#fff;border:0;border-radius:10px;padding:.6rem 1.4rem;font-weight:700;white-space:nowrap}
.btn-go:hover{background:var(--pri-d);color:#fff}
.btn-outline-success{--bs-btn-color:var(--pri);--bs-btn-border-color:var(--pri);--bs-btn-hover-bg:var(--pri);--bs-btn-hover-border-color:var(--pri)}
.btn-success{background:var(--pri);border-color:var(--pri);border-radius:10px;font-weight:700}
.table{margin:0}.table th{color:var(--sub);font-weight:600;font-size:13px;background:#f8fafc}
.table td,.table th{padding:.7rem .6rem;border-color:#eef0f3}
.good,.soso,.bad{display:inline-block;padding:2px 10px;border-radius:99px;font-weight:700;font-size:13px}
.good{background:#dcfce7;color:#15803d}.soso{background:#fef3c7;color:#b45309}.bad{background:#fee2e2;color:#b91c1c}
.err{background:#fef2f2;color:#b91c1c;border:1px solid #fecaca;padding:12px 14px;border-radius:12px}
.tools{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:12px;margin-top:6px}
.tools a{display:block;border:1px solid var(--line);border-radius:12px;padding:14px;color:var(--ink);background:#fff}
.tools a:hover{border-color:var(--pri);box-shadow:0 4px 14px -8px rgba(37,99,235,.5)}
.tools b{display:block}.tools span{font-size:13px;color:var(--sub)}
.foot{text-align:center;color:var(--sub);font-size:13px;padding:10px 0 30px}
@media(max-width:640px){.top-in{gap:10px}.brand span{display:none}.hero h1{font-size:22px}.card{padding:16px}}
.guide h2{font-size:19px;font-weight:800;margin:22px 0 10px}.guide li{margin-bottom:6px}.guide p{line-height:1.8}