:root {
  --color-bg: #fafaf7;
  --color-text: #1a1a1a;
  --color-muted: #666;
  --color-accent: #d24d2c;
  --color-line: #e0e0dc;
  --font-serif: Georgia, "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --space-s: 0.5rem;
  --space-m: 1rem;
  --space-l: 2rem;
  --space-xl: 4rem;
  --space-xxl: 8rem;
  --max-width-text: 38rem;
  --max-width-wide: 72rem;
}
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-serif);
  font-size: 17px; line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: underline; text-underline-offset: 0.2em; }
a:hover { color: var(--color-accent); }
img { max-width: 100%; height: auto; display: block; }
main { padding: var(--space-l) var(--space-m); max-width: var(--max-width-wide); margin: 0 auto; }
article { max-width: var(--max-width-text); }
h1 { font-size: 2.5rem; font-weight: 400; margin: 0 0 var(--space-l); line-height: 1.2; }
h2 { font-size: 1.5rem; font-weight: 400; margin: var(--space-l) 0 var(--space-m); }
h3 { font-size: 1.1rem; font-weight: 500; margin: var(--space-m) 0 var(--space-s); }
p { margin: 0 0 var(--space-m); }
.muted { color: var(--color-muted); font-size: 0.9rem; }
.site-header {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: var(--space-m) var(--space-l); border-bottom: 1px solid var(--color-line);
  font-family: var(--font-sans); font-size: 0.85rem; letter-spacing: 0.05em; text-transform: uppercase;
}
a.site-logo, a.site-logo:link, a.site-logo:visited, a.site-logo:hover, a.site-logo:focus, a.site-logo:active { font-weight: 700 !important; letter-spacing: 0.06em; text-decoration: none !important; -webkit-text-decoration: none !important; color: inherit; border: none !important; box-shadow: none !important; background-image: none !important; }
a.site-logo:hover { color: var(--color-accent); }
.site-header nav a { margin-left: var(--space-m); text-decoration: none; }
.site-header nav a:hover { text-decoration: underline; }
.site-footer {
  padding: var(--space-l) var(--space-l); border-top: 1px solid var(--color-line);
  font-family: var(--font-sans); font-size: 0.8rem; color: var(--color-muted); text-align: center;
}
.compare-banner {
  position: fixed; top: 0; left: 0; right: 0;
  background: #ffe; border-bottom: 1px solid #cc8;
  padding: 0.5rem 1rem; font-family: var(--font-sans); font-size: 0.85rem; z-index: 100;
}


/* === Mobile (≤768px) === */
@media (max-width: 768px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    padding: var(--space-m);
  }
  .site-header nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    width: 100%;
  }
  a.site-logo, a.site-logo:link, a.site-logo:visited, a.site-logo:hover, a.site-logo:focus, a.site-logo:active { font-weight: 700 !important; letter-spacing: 0.06em; text-decoration: none !important; -webkit-text-decoration: none !important; color: inherit; border: none !important; box-shadow: none !important; background-image: none !important; }
a.site-logo:hover { color: var(--color-accent); }
.site-header nav a {
    margin-left: 0;
    margin-right: 0.6rem;
    font-size: 0.8rem;
  }
  main {
    padding: var(--space-m) var(--space-m);
  }
  h1 { font-size: 2rem !important; margin-bottom: var(--space-l) !important; }
  .site-footer { padding: var(--space-m) var(--space-m); }
  /* Diary calendar mobile: smaller cells */
  .diary-calendar [class*="month"] { grid-template-columns: repeat(7, 1fr); font-size: 0.7rem; }
}