/* ==========================================================================
   Site chrome — header, navigation, announcement bar, footer
   ========================================================================== */

/* ------------------------------------------------------------- Header -- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: .75rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: var(--header-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: .8rem;
  color: var(--ink);
  flex-shrink: 0;
}
.brand:hover { color: var(--ink); }

.brand-logo {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong {
  font-size: .95rem;
  letter-spacing: .04em;
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}
.brand-text small {
  font-size: .68rem;
  letter-spacing: .24em;
  color: var(--teal-500);
  margin-top: .18rem;
}

/* ------------------------------------------------------------ Primary nav -- */

.primary-nav {
  display: flex;
  align-items: center;
  gap: 1.6rem;
  margin-left: auto;
}

.primary-nav ul {
  display: flex;
  align-items: center;
  gap: 1.55rem;
}

.primary-nav a {
  color: var(--teal-700);
  font-size: .87rem;
  font-weight: 600;
  letter-spacing: .01em;
  white-space: nowrap;
  padding: .35rem 0;
  border-bottom: 1px solid transparent;
  transition: border-color .16s ease, color .16s ease;
}
.primary-nav a:hover,
.primary-nav a[aria-current="page"] {
  color: var(--teal-500);
  border-bottom-color: var(--teal-400);
}

.nav-side { display: flex; align-items: center; gap: .9rem; }

/* ------------------------------------------------------- Language menu -- *
 *
 * <details>/<summary> rather than a <select> or a scripted menu: it opens on
 * click with JavaScript disabled, and keyboard and screen-reader behaviour
 * come for free. The list is 9 languages long, so it overlays the page rather
 * than reflowing the header.
 */

.lang-menu { position: relative; }

.lang-menu > summary {
  display: flex;
  align-items: center;
  gap: .4rem;
  list-style: none;                 /* hides the default disclosure triangle */
  cursor: pointer;
  font-size: .78rem;
  font-weight: 700;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: .36rem .78rem;
  white-space: nowrap;
  transition: border-color .16s ease, color .16s ease;
}
.lang-menu > summary::-webkit-details-marker { display: none; }
.lang-menu > summary:hover { border-color: var(--teal-300); color: var(--teal-600); }
.lang-menu > summary svg { width: 10px; height: 7px; flex: none; transition: transform .18s ease; }
.lang-menu[open] > summary { border-color: var(--teal-300); color: var(--teal-600); }
.lang-menu[open] > summary svg { transform: rotate(180deg); }

.lang-menu > ul {
  position: absolute;
  top: calc(100% + .5rem);
  right: 0;
  z-index: 60;
  min-width: 13rem;
  margin: 0;
  padding: .4rem;
  list-style: none;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.lang-menu > ul a {
  display: block;
  padding: .48rem .7rem;
  border-radius: 2px;
  font-size: .88rem;
  color: var(--body);
}
.lang-menu > ul a:hover { background: var(--teal-50); color: var(--teal-600); }
/* aria-current is set by the renderer, so the reader can see which language
   they are already reading without comparing the labels. */
.lang-menu > ul a[aria-current] { background: var(--teal-500); color: #fff; font-weight: 700; }

/* CSS-only disclosure: the checkbox drives the panel, so navigation works
   with JavaScript disabled. */
.nav-toggle { position: absolute; opacity: 0; pointer-events: none; }

.nav-toggle-label {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  cursor: pointer;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-left: auto;
}
.nav-toggle-label span {
  display: block;
  height: 2px;
  background: var(--teal-600);
  border-radius: 2px;
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle:focus-visible + .nav-toggle-label { outline: 2px solid var(--teal-500); outline-offset: 3px; }

/* ------------------------------------------------- Announcement bar -- */

.announce {
  background: var(--teal-500);
  color: #fff;
  text-align: center;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .04em;
  padding: .6rem var(--gutter);
}

/* ------------------------------------------------------------- Footer -- */

.site-footer {
  background: var(--teal-800);
  color: #cfe4e1;
  margin-top: 0;
}

.footer-grid {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(3rem, 6vw, 5rem) var(--gutter) 2.5rem;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: clamp(1.8rem, 4vw, 3.5rem);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: .8rem;
  margin-bottom: 1.1rem;
}
.footer-brand img { width: 52px; height: 52px; border-radius: 50%; object-fit: cover; }
.footer-brand .brand-text strong { color: #fff; }
.footer-brand .brand-text small { color: var(--teal-300); }

.footer-about p {
  font-size: .88rem;
  line-height: 1.75;
  color: #a9c8c4;
  max-width: 38ch;
}

.footer-contact { margin-top: 1.2rem; display: grid; gap: .4rem; }
.footer-contact li { font-size: .85rem; color: #a9c8c4; }
.footer-contact a { color: #cfe4e1; border-bottom: 1px solid rgba(207, 228, 225, .28); }
.footer-contact a:hover { color: #fff; border-bottom-color: #fff; }

.footer-heading {
  font-family: var(--font-sans);
  font-size: .74rem;
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--teal-300);
  margin: 0 0 1.1rem;
}

.footer-col ul { display: grid; gap: .55rem; }
.footer-col li a {
  color: #cfe4e1;
  font-size: .88rem;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
}
.footer-col li a:hover { color: #fff; border-bottom-color: rgba(255, 255, 255, .5); }

.footer-tagline {
  margin-top: 1.1rem;
  font-family: var(--font-serif);
  font-size: .92rem;
  color: var(--teal-300);
  font-style: italic;
}

/* Social icons — inline SVG on brand-coloured tiles, so no sprite sheet or
   icon font is needed and the set can be edited from data/site.json. */
.social-icons { display: flex; flex-wrap: wrap; gap: .6rem; }

.social-icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--tile, var(--teal-500));
  color: #fff;
  transition: transform .16s ease, box-shadow .16s ease;
}
.social-icon:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0, 0, 0, .3); }
.social-icon svg { width: 22px; height: 22px; }
.social-icon svg .cut { fill: var(--tile, var(--teal-500)); }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .12);
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.4rem var(--gutter) 2.2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .6rem 1.5rem;
}
.footer-bottom p { margin: 0; font-size: .78rem; color: #90b3af; }
.footer-bottom a { color: #a9c8c4; }
.footer-credit { font-family: var(--font-serif); font-style: italic; }

/* --------------------------------------------------------- Responsive -- */

@media (max-width: 1080px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-about { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .nav-toggle-label { display: flex; }

  .primary-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: .5rem var(--gutter) 1.4rem;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }
  .nav-toggle:checked ~ .primary-nav { display: flex; }

  .primary-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .primary-nav ul li { border-bottom: 1px solid var(--line-soft); }
  .primary-nav ul a {
    display: block;
    padding: .95rem 0;
    font-size: 1rem;
    border-bottom: 0;
  }

  .nav-side {
    margin-top: 1.1rem;
    justify-content: space-between;
    align-items: flex-start;
  }

  /* Inside the slide-down panel there is no room for an overlay, and 9 entries
     in a dropdown on a phone is a worse experience than 9 visible rows. The
     list opens in place and the panel grows with it. */
  .lang-menu { flex: 1; }
  .lang-menu > ul {
    position: static;
    margin-top: .5rem;
    min-width: 0;
    width: 100%;
    box-shadow: none;
    background: var(--teal-50);
  }
  .lang-menu > ul a { padding: .6rem .7rem; }
  .lang-menu > ul a[aria-current] { background: var(--teal-500); }

  .nav-toggle:checked + .nav-toggle-label span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle:checked + .nav-toggle-label span:nth-child(2) { opacity: 0; }
  .nav-toggle:checked + .nav-toggle-label span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

@media (max-width: 760px) {
  .header-inner { padding: .6rem var(--gutter); gap: .75rem; }
  .brand-logo { width: 40px; height: 40px; }
  .brand-text strong { font-size: .82rem; }
  .brand-text small { font-size: .6rem; letter-spacing: .18em; }
  .footer-grid { grid-template-columns: 1fr; }
}