:root {
  color-scheme: light;
  --ink: #102a43;
  --muted: #607789;
  --line: #d6e2ea;
  --paper: #fffdf8;
  --teal: #0b8f83;
  --teal-soft: #e8f7f4;
  --navy: #102a43;
  --amber: #f2b84b;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: linear-gradient(180deg, #f4faf9 0, var(--paper) 310px);
  color: var(--ink);
  font: 16px/1.72 system-ui, -apple-system, "Segoe UI", "PingFang TC", "Hiragino Sans", "Noto Sans KR", sans-serif;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 76px;
  padding: 12px max(24px, calc((100vw - 880px) / 2));
  border-bottom: 1px solid rgba(16, 42, 67, .12);
  background: rgba(255, 253, 248, .94);
  backdrop-filter: blur(14px);
}

.brand { display: flex; align-items: center; gap: 11px; color: inherit; text-decoration: none; }
.brand img { border-radius: 11px; box-shadow: 0 7px 20px rgba(16, 42, 67, .18); }
.brand span { display: grid; line-height: 1.15; }
.brand strong { font-size: 17px; letter-spacing: -.01em; }
.brand small { margin-top: 4px; color: var(--muted); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 5px; }
nav button {
  min-height: 34px;
  padding: 5px 10px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font: 700 12px/1 system-ui, sans-serif;
  cursor: pointer;
}
nav button:hover { background: var(--teal-soft); color: var(--ink); }
nav button[aria-current="true"] { border-color: var(--teal); background: var(--teal); color: #fff; }

main { width: min(100% - 40px, 820px); margin: 0 auto; padding: 72px 0 76px; }
article { min-height: 70vh; }
.eyebrow { margin: 0 0 8px; color: var(--teal); font-size: 12px; font-weight: 850; letter-spacing: .16em; }
h1 { margin: 0; font-size: clamp(38px, 7vw, 64px); line-height: 1.03; letter-spacing: -.045em; }
.effective { margin: 15px 0 32px; color: var(--muted); font-size: 14px; }
.lead {
  margin: 0 0 42px;
  padding: 24px 26px;
  border: 1px solid #b9ded8;
  border-left: 5px solid var(--teal);
  border-radius: 14px;
  background: var(--teal-soft);
  font-size: 18px;
}
h2 { margin: 37px 0 8px; font-size: 22px; line-height: 1.3; letter-spacing: -.02em; }
p { margin: 0 0 16px; }
ul { margin: 9px 0 20px; padding-left: 25px; }
li + li { margin-top: 8px; }
strong { color: #092139; }
footer { padding: 28px 20px; border-top: 1px solid var(--line); color: var(--muted); text-align: center; font-size: 13px; }
button:focus-visible, a:focus-visible { outline: 3px solid var(--amber); outline-offset: 3px; }

@media (max-width: 620px) {
  .site-header { position: static; align-items: flex-start; padding: 13px 18px; }
  .brand small { display: none; }
  nav { max-width: 180px; }
  nav button { min-height: 30px; padding: 4px 8px; }
  main { width: min(100% - 32px, 820px); padding-top: 46px; }
  .lead { padding: 19px; font-size: 16px; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }