:root {
  color-scheme: light dark;
  --color-canvas: #ffffff;
  --color-surface: #f7f6f3;
  --color-text: #191919;
  --color-muted: #787774;
  --color-border: #e9e9e7;
  --color-accent: #2383e2;
  --color-accent-strong: #191919;
  --color-wash: rgb(0 0 0 / 6%);
  --color-warning-surface: #fbf3db;
  --color-warning-border: #e9d9a7;
  --radius-control: 6px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-canvas: #191919;
    --color-surface: #202020;
    --color-text: #f1f1ef;
    --color-muted: #9b9a97;
    --color-border: #373737;
    --color-accent: #529cca;
    --color-accent-strong: #f1f1ef;
    --color-wash: rgb(255 255 255 / 8%);
    --color-warning-surface: #2d281e;
    --color-warning-border: #554a2b;
  }
}

* {
  box-sizing: border-box;
}

html {
  background: var(--color-canvas);
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--color-canvas);
  color: var(--color-text);
  font-family:
    Inter, Pretendard, -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo",
    "Malgun Gothic", "Noto Sans KR", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration-color: var(--color-muted);
  text-underline-offset: 3px;
}

a:hover {
  text-decoration-color: currentColor;
}

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.guide-shell {
  width: min(100%, 760px);
  margin: 0 auto;
  padding: 0 24px 80px;
}

.guide-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 72px;
  border-bottom: 1px solid var(--color-border);
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
}

.brand-link img {
  width: 22px;
  height: 22px;
}

.language-links {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-muted);
  font-size: 13px;
}

.language-links [aria-current="page"] {
  color: var(--color-text);
  font-weight: 600;
  text-decoration: none;
}

.language-links a,
.guide-footer a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

main {
  padding-top: clamp(48px, 9vw, 80px);
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 600;
}

h1,
h2 {
  margin: 0;
  letter-spacing: -0.025em;
  word-break: keep-all;
}

h1 {
  max-width: 680px;
  font-size: clamp(32px, 7vw, 48px);
  line-height: 1.14;
}

h2 {
  font-size: 22px;
  line-height: 1.35;
}

.lead {
  max-width: 620px;
  margin: 20px 0 0;
  color: var(--color-muted);
  font-size: 17px;
  line-height: 1.7;
}

.primary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  margin-top: 28px;
  padding: 0 18px;
  border-radius: var(--radius-control);
  background: var(--color-accent-strong);
  color: var(--color-canvas);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.primary-link:hover {
  background: linear-gradient(var(--color-wash), var(--color-wash)) var(--color-accent-strong);
}

.guide-section {
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.guide-section > p,
.guide-section li {
  font-size: 16px;
  line-height: 1.75;
}

.guide-section > p {
  margin: 14px 0 0;
}

.steps {
  display: grid;
  gap: 24px;
  margin: 24px 0 0;
  padding-left: 24px;
}

.steps li {
  padding-left: 8px;
}

.steps strong {
  display: block;
  margin-bottom: 4px;
  font-weight: 600;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  padding: 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  background: var(--color-surface);
}

.feature-list strong {
  display: block;
  margin-bottom: 5px;
  font-size: 14px;
}

.feature-list span {
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.55;
}

.warning {
  margin-top: 64px;
  padding: 24px;
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius-control);
  background: var(--color-warning-surface);
}

.warning p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.7;
}

.guide-footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 13px;
}

@media (max-width: 560px) {
  .guide-shell {
    padding-right: 16px;
    padding-bottom: 56px;
    padding-left: 16px;
  }

  .guide-header {
    gap: 12px;
  }

  .language-links {
    gap: 10px;
  }

  .feature-list {
    grid-template-columns: 1fr;
  }

  .guide-section,
  .warning,
  .guide-footer {
    margin-top: 48px;
  }

  .warning {
    padding: 20px;
  }
}