/* BY High archive — single shared stylesheet. No frameworks, no external fonts. */

:root {
  --byh-bg: #ffffff;
  --byh-ink: #1a1a1a;
  --byh-accent: #00008b;
  --byh-accent-soft: #6699ff;
  --byh-panel: #eef4ff;
  --byh-line: #cbd8ee;
  --byh-link: #0645ad;
  --byh-link-visited: #663366;
  --byh-banner-bg: #f2f2f2;
  --byh-banner-ink: #333333;
  --byh-banner-border: #d0d0d0;
  --byh-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --byh-font-serif: Georgia, "Times New Roman", serif;
  --byh-max-width: 46rem;
}

* { box-sizing: border-box; }

html { color-scheme: light; }

body {
  margin: 0;
  background: var(--byh-bg);
  color: var(--byh-ink);
  font-family: var(--byh-font);
  line-height: 1.55;
  font-size: clamp(1rem, 0.94rem + 0.3vw, 1.125rem);
}

img, svg { max-width: 100%; height: auto; }

a { color: var(--byh-link); }
a:visited { color: var(--byh-link-visited); }
a:hover, a:focus-visible { text-decoration-thickness: 2px; }

/* --- Archival notice banner --- */
.archive-banner {
  background: var(--byh-banner-bg);
  color: var(--byh-banner-ink);
  border-bottom: 1px solid var(--byh-banner-border);
  font-size: 0.8rem;
  line-height: 1.4;
  padding: 0.6em 1em;
  text-align: center;
}
.archive-banner strong { font-weight: 600; }

/* --- Page shell --- */
.site-header { text-align: center; padding: 1rem 1rem 0; }
.site-header img { display: block; margin: 0 auto; }

.page {
  max-width: var(--byh-max-width);
  margin: 0 auto;
  padding: 1.25rem 1rem 3rem;
}

.page-layout {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  max-width: 64rem;
  margin: 0 auto;
  padding: 0 1rem 3rem;
  align-items: flex-start;
}
.page-layout > .page { padding: 1.25rem 0 0; flex: 1 1 32rem; }

h1, h2, h3 {
  font-family: var(--byh-font-serif);
  color: var(--byh-accent);
  line-height: 1.2;
}
h1 { font-size: clamp(1.6rem, 1.3rem + 1.6vw, 2.4rem); text-align: center; margin: 0.6em 0 0.3em; }
h2 { font-size: clamp(1.15rem, 1.05rem + 0.6vw, 1.5rem); margin: 1.2em 0 0.4em; }
h3 { font-size: 1.05rem; margin: 1em 0 0.3em; }

p { margin: 0 0 1em; }
blockquote {
  margin: 0 0 1em 0;
  padding-left: 1em;
  border-left: 3px solid var(--byh-line);
  color: var(--byh-ink);
}

hr {
  border: none;
  border-top: 1px solid var(--byh-line);
  margin: 1.5em auto;
  max-width: var(--byh-max-width);
}

figure { margin: 1em 0; text-align: center; }
figure img { border-radius: 2px; }
figcaption { font-size: 0.85rem; color: #444; margin-top: 0.4em; }

ul.bullet-list { padding-left: 1.2em; margin: 0 0 1em; }
ul.bullet-list li { margin: 0.5em 0; }

/* --- Nav / sidebar sections (Directory, Pictures, History, ...) --- */
nav.site-nav {
  background: var(--byh-panel);
  border: 1px solid var(--byh-line);
  border-radius: 6px;
  padding: 1rem;
  flex: 0 1 14rem;
}
nav.site-nav h2 {
  font-family: var(--byh-font);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--byh-accent);
  margin: 1em 0 0.3em;
}
nav.site-nav h2:first-child { margin-top: 0; }
nav.site-nav ul { list-style: none; margin: 0 0 0.5em; padding: 0; }
nav.site-nav li { margin: 0.25em 0; }
nav.site-nav a { text-decoration: none; display: flex; align-items: center; gap: 0.4em; }
nav.site-nav a:hover { text-decoration: underline; }
nav.site-nav svg { width: 0.9em; height: 0.9em; flex: none; fill: var(--byh-accent-soft); }

nav.button-bar ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em 1em;
  margin: 1em 0;
  padding: 0;
  justify-content: center;
}
nav.button-bar a {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  text-decoration: none;
  padding: 0.3em 0.7em;
  border: 1px solid var(--byh-line);
  border-radius: 5px;
}
nav.button-bar a:hover { background: var(--byh-panel); }

/* --- Footer --- */
.site-footer {
  text-align: center;
  font-size: 0.85rem;
  color: #333;
  border-top: 1px solid var(--byh-line);
  padding: 1.5rem 1rem 2rem;
  max-width: var(--byh-max-width);
  margin: 0 auto;
}
.site-footer p { margin: 0.4em 0; }
.site-footer a { display: inline-flex; align-items: center; gap: 0.3em; }
.site-footer svg { width: 0.9em; height: 0.9em; fill: currentColor; }
.site-footer .copyright { color: #666; }

/* --- Forms (AddMe / UpdateMe) --- */
form.archive-form { display: grid; gap: 0.9rem; max-width: 32rem; margin: 1.5rem auto; }
form.archive-form label { display: grid; gap: 0.3em; font-weight: 600; }
form.archive-form input, form.archive-form select, form.archive-form textarea {
  font: inherit;
  padding: 0.5em 0.6em;
  border: 1px solid var(--byh-line);
  border-radius: 4px;
}
form.archive-form button {
  font: inherit;
  padding: 0.6em 1.2em;
  border: none;
  border-radius: 5px;
  background: var(--byh-accent-soft);
  color: #fff;
  cursor: pointer;
  justify-self: start;
}

@media (max-width: 640px) {
  .page-layout { flex-direction: column; }
  nav.site-nav { flex: 1 1 auto; width: 100%; }
}

@media print {
  .archive-banner, nav.site-nav, nav.button-bar, .site-footer { display: none; }
}