:root {
  --bg: #0F1B2E;
  --paper: #F7F3EA;
  --ink: #23201A;
  --ink-muted: #6B6558;
  --accent: #F6C453;
  --border: #E4DCC8;
  --header-bg: #12213B;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo",
    "Noto Sans KR", "Hiragino Kaku Gothic ProN", "Noto Sans JP", Roboto, sans-serif;
  color: var(--ink);
  line-height: 1.7;
}

header.top {
  background: var(--header-bg);
  padding: 20px 16px 16px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.top-inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.brand {
  color: var(--accent);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.5px;
  text-decoration: none;
}

.lang-switch {
  display: flex;
  gap: 6px;
  background: rgba(255,255,255,0.08);
  padding: 4px;
  border-radius: 10px;
}

.lang-switch button {
  appearance: none;
  border: none;
  background: transparent;
  color: #C9D2E3;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 7px;
  cursor: pointer;
}

.lang-switch button.active {
  background: var(--accent);
  color: #12213B;
}

.doc-switch {
  max-width: 720px;
  margin: 12px auto 0;
  padding: 0 16px;
  display: flex;
  gap: 16px;
}

.doc-switch a {
  color: #C9D2E3;
  font-size: 13px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.doc-switch a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

main {
  max-width: 720px;
  margin: 0 auto;
  background: var(--paper);
  padding: 32px 24px 64px;
  min-height: 100vh;
}

.lang-block { display: none; }
.lang-block.active { display: block; }

.lang-block h1 {
  font-size: 22px;
  margin: 0 0 4px;
  color: var(--ink);
}

.lang-block > p:first-of-type {
  color: var(--ink-muted);
  font-size: 13px;
  margin-top: 0;
}

.lang-block h2 {
  font-size: 16px;
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: var(--ink);
}

.lang-block h3 {
  font-size: 14px;
  margin-top: 20px;
  color: var(--ink);
}

.lang-block p, .lang-block li {
  font-size: 14.5px;
  color: var(--ink);
}

.lang-block ul {
  padding-left: 20px;
}

.lang-block a {
  color: #8A6A1E;
}

.lang-block strong {
  color: var(--ink);
}

footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 16px 40px;
  text-align: center;
  color: #7C88A0;
  font-size: 12px;
}