:root {
  color-scheme: light;
  --surface-primary: #ffffff;
  --surface-secondary: #f7f7f7;
  --surface-elevated: #ffffff;
  --text-primary: #111111;
  --text-secondary: #555555;
  --text-tertiary: #888888;
  --border-default: #dddddd;
  --border-subtle: #eeeeee;
  --accent-primary: #111111;
  --accent-hover: #555555;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--surface-primary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}

:lang(ko) body {
  word-break: keep-all;
}

a {
  color: var(--text-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  overflow-wrap: anywhere;
}

a:hover {
  color: var(--accent-hover);
}

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

.skip-link {
  position: fixed;
  left: var(--space-4);
  top: var(--space-4);
  transform: translateY(-160%);
  background: var(--text-primary);
  color: var(--surface-primary);
  padding: var(--space-2) var(--space-3);
  z-index: 10;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  border-bottom: 1px solid var(--border-default);
}

.site-nav,
.page,
.site-footer {
  max-width: 720px;
  margin: 0 auto;
  padding-inline: var(--space-5);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-5);
}

.site-name {
  font-weight: 700;
  text-decoration: none;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: 14px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--text-primary);
  text-decoration: underline;
}

.page {
  padding-block: var(--space-16);
}

.intro {
  margin-bottom: var(--space-16);
}

.intro h1 {
  margin: 0 0 var(--space-4);
  font-size: 36px;
  line-height: 1.15;
}

.intro p,
.section > p {
  max-width: 66ch;
  margin: 0;
  color: var(--text-secondary);
  font-size: 18px;
  line-height: 1.65;
}

.section {
  margin-top: var(--space-12);
}

.section h2 {
  margin: 0 0 var(--space-4);
  font-size: 22px;
  line-height: 1.3;
}

.entry-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--border-default);
}

.entry-list li {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: var(--space-5);
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--border-subtle);
}

.entry-list time {
  color: var(--text-tertiary);
  font-size: 14px;
  line-height: 1.4;
}

.entry-list h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.35;
}

.entry-list p {
  margin: var(--space-2) 0 0;
  color: var(--text-secondary);
  line-height: 1.6;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-5) !important;
  font-size: 16px !important;
}

.site-footer {
  border-top: 1px solid var(--border-default);
  padding-block: var(--space-8);
  color: var(--text-tertiary);
  font-size: 13px;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 640px) {
  .site-nav,
  .page,
  .site-footer {
    padding-inline: var(--space-4);
  }

  .site-nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .page {
    padding-block: var(--space-10);
  }

  .intro {
    margin-bottom: var(--space-12);
  }

  .intro h1 {
    font-size: 32px;
  }

  .intro p,
  .section > p {
    font-size: 16px;
  }

  .entry-list li {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }
}