/* The Rimu Systems site header, shared by the Flask pages and the MkDocs
   documentation at /docs/.
 *
 * These rules mirror the header section of style.css. They live in their own
 * file because the documentation cannot load style.css: that stylesheet sets
 * global "*", "body" and "a" rules that would break the Material theme's
 * layout and typography.
 *
 * Everything is scoped under .rimu-site-header. Material's own header is also
 * a <header> element, so an unscoped "header" rule would restyle it.
 *
 * Lengths are in px, not rem. Material sets html{font-size:125%}, so a rem
 * here would be 20px instead of the site's 16px and the header would render
 * a quarter larger. The px values are the rem values from style.css
 * multiplied by 16, so both contexts match.
 *
 * KEEP IN STEP with the header rules in style.css. If the header changes
 * there, change it here too.
 */

.rimu-site-header {
  --bg-primary: #0a1a3a;
  --bg-secondary: #0f3d7a;
  --text-primary: #ffffff;
  --text-secondary: #c7d0e0;
  --accent-cyan: #00e5ff;
  --accent-green: #00ff7f;
  --border-subtle: #1f2b55;
  --font-heading: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  border-bottom: 1px solid var(--border-subtle);
  background: rgba(5, 10, 30, 0.9);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 10;
  line-height: 1.5;
}

.rimu-site-header *,
.rimu-site-header *::before,
.rimu-site-header *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.rimu-site-header a {
  color: inherit;
  text-decoration: none;
}

.rimu-site-header img {
  max-width: 100%;
  display: block;
}

.rimu-site-header .nav {
  max-width: 1120px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.rimu-site-header .nav-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.rimu-site-header .nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.rimu-site-header .nav-logo {
  width: auto;
  height: 46px;
}

.rimu-site-header .nav-title {
  font-family: var(--font-heading);
  font-weight: 600;
  letter-spacing: 0.04em;
  font-size: 24px;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--text-primary);
}

.rimu-site-header .nav-title-llc {
  font-size: 0.65em;
}

.rimu-site-header .nav-links {
  display: flex;
  gap: 20px;
  font-size: 15.2px;
  color: var(--text-secondary);
}

.rimu-site-header .nav-links a:hover {
  color: var(--accent-cyan);
}

.rimu-site-header .nav-cta {
  display: flex;
  gap: 12px;
}

.rimu-site-header .nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
}

.rimu-site-header .nav-toggle:hover {
  border-color: var(--accent-cyan);
}

.rimu-site-header .nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
}

.rimu-site-header .btn {
  border-radius: 999px;
  padding: 8px 17.6px;
  font-size: 14.4px;
  border: 1px solid transparent;
  cursor: pointer;
  background: transparent;
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5.6px;
  white-space: nowrap;
  font-family: inherit;
}

.rimu-site-header .btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
  color: #020617;
  font-weight: 600;
}

.rimu-site-header .btn-outline {
  border-color: var(--border-subtle);
  color: var(--text-secondary);
}

.rimu-site-header .btn-outline:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

/* Collapse the nav to the hamburger before the wordmark can crowd the links */
@media (max-width: 1040px) {
  .rimu-site-header .nav {
    gap: 16px;
    flex-wrap: wrap;
  }

  .rimu-site-header .nav-toggle {
    display: inline-flex;
  }

  .rimu-site-header .nav-links {
    display: none;
  }

  .rimu-site-header .nav.nav-open .nav-links {
    display: flex;
    flex-direction: column;
    gap: 0;
    order: 5;
    width: 100%;
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border-subtle);
  }

  .rimu-site-header .nav.nav-open .nav-links a {
    padding: 10.4px 0;
  }
}

@media (max-width: 640px) {
  .rimu-site-header .nav {
    padding-inline: 16px;
    flex-wrap: wrap;
  }

  .rimu-site-header .nav-logo {
    height: 38px;
  }

  .rimu-site-header .nav-title {
    font-size: 14.4px;
  }

  .rimu-site-header .nav-cta {
    order: 3;
    width: 100%;
    justify-content: stretch;
    gap: 8px;
  }

  .rimu-site-header .nav-cta .btn {
    flex: 1;
    padding: 10.4px 16px;
    font-size: 13.6px;
  }
}

@media (max-width: 400px) {
  .rimu-site-header .nav-logo {
    height: 32px;
  }

  .rimu-site-header .nav-title {
    font-size: 12.8px;
  }
}

@media (hover: none) and (pointer: coarse) {
  .rimu-site-header .btn,
  .rimu-site-header .nav-links a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
}