* { margin: 0; padding: 0; box-sizing: border-box; }
:root { --primary:#16a34a; --primary-dark:#15803d; --primary-light:#dcfce7; --primary-text:#14532d; }
body { font-family:'Apple SD Gothic Neo','Pretendard',sans-serif; color:#1a1a1a; background:#fafafa; line-height:1.75; }
a { color: var(--primary-dark); }

.page-header {
  position: sticky; top: 0; z-index: 10; height: 52px;
  background: rgba(255,255,255,.97); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid #e0e0e0;
  display: flex; align-items: center; justify-content: space-between; padding: 0 20px;
}
.page-header .logo { font-size:14px; font-weight:800; letter-spacing:1.5px; color:var(--primary); text-decoration:none; }
.page-header .back { font-size:12px; font-weight:600; background:var(--primary); color:#fff; border-radius:20px; padding:5px 14px; text-decoration:none; }

main { max-width: 760px; margin: 0 auto; padding: 36px 20px 60px; }
h1 { font-size: 26px; font-weight: 800; letter-spacing: -.5px; margin-bottom: 6px; line-height: 1.35; }
.meta { font-size: 13px; color: #888; margin-bottom: 28px; }
h2 { font-size: 18px; font-weight: 800; color: var(--primary-text); margin: 34px 0 10px; }
h3 { font-size: 15px; font-weight: 700; margin: 20px 0 6px; }
p, li { font-size: 14.5px; color: #333; }
p { margin-bottom: 12px; }
ul, ol { padding-left: 20px; margin-bottom: 12px; }
li { margin-bottom: 4px; }
table { width: 100%; border-collapse: collapse; margin: 10px 0 16px; font-size: 13.5px; background: #fff; }
th, td { border: 1px solid #e5e5e5; padding: 9px 10px; text-align: left; vertical-align: top; }
th { background: var(--primary-light); color: var(--primary-text); }
.card { display:block; background:#fff; border:1px solid #eee; border-radius:14px; padding:18px 20px; margin-bottom:12px; text-decoration:none; color:inherit; transition: border-color .15s; }
.card:hover { border-color: var(--primary); }
.card-title { font-size: 16px; font-weight: 700; }
.card-desc { font-size: 13px; color: #777; margin-top: 4px; }
.cta { display:inline-block; margin-top:24px; background:var(--primary); color:#fff; padding:12px 22px; border-radius:12px; font-weight:700; text-decoration:none; }
.cta:hover { background: var(--primary-dark); }

.site-footer { border-top: 1px solid #e5e5e5; padding: 24px 20px; text-align: center; font-size: 12px; color: #999; }
.site-footer a { color: #666; margin: 0 8px; text-decoration: none; }
.site-footer a:hover { color: var(--primary); }

@media (max-width: 640px) {
  main { padding: 28px 18px 48px; }
  h1 { font-size: 22px; }
  table { font-size: 12.5px; }
}