/* Shared: design tokens, base, layout shell, header chrome, language dropdown */

:root {
  --content-max: 72rem;
  --page-pad: 1.25rem;
  --color-text: #1a1f24;
  --color-text-muted: #4a5568;
  --color-border: #e2e6eb;
  --color-header-bg: #fafbfc;
  --color-accent: #1e3a5f;
  --color-accent-hover: #152a45;
  --color-locale-active-bg: #e8eef4;
  --radius-sm: 6px;
  --focus-ring: 0 0 0 2px var(--color-header-bg), 0 0 0 4px var(--color-accent);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
  color: var(--color-text);
  background: #f6f8fb;
}

/* Full-width sticky bar; content aligned with .site-main */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  padding: 0.625rem max(var(--page-pad), calc((100% - var(--content-max)) / 2));
  border-bottom: 1px solid var(--color-border);
  background: var(--color-header-bg);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.04);
}

.site-brand {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.site-brand a {
  color: var(--color-text);
  text-decoration: none;
}

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

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem;
}

.site-home-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.3rem 0.55rem;
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.2;
  color: var(--color-accent);
  text-decoration: none;
  border-radius: var(--radius-sm);
}

.site-home-link:hover {
  background: var(--color-locale-active-bg);
  color: var(--color-accent-hover);
}

.site-home-link[aria-current="page"] {
  color: var(--color-text);
}

.site-home-link[aria-current="page"]:hover {
  color: var(--color-accent);
}

.site-header-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  flex: 1 1 auto;
  justify-content: flex-end;
  min-width: 0;
}

/* Language dropdown */
.site-lang {
  position: relative;
  flex: 0 0 auto;
}

.site-lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0;
  padding: 0.4rem 0.55rem 0.4rem 0.65rem;
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-transform: none;
  color: var(--color-accent);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  line-height: 1.2;
}

.site-lang-toggle:hover {
  background: var(--color-locale-active-bg);
  border-color: #cdd4dc;
}

.site-lang-chevron {
  flex-shrink: 0;
  color: var(--color-text-muted);
  transition: transform 0.15s ease;
}

.site-lang.is-open .site-lang-chevron {
  transform: rotate(180deg);
}

.site-lang-dropdown {
  position: absolute;
  top: calc(100% + 0.35rem);
  right: 0;
  min-width: 7rem;
  padding: 0.35rem 0;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
  z-index: 200;
}

.site-lang-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-lang-list a {
  display: block;
  padding: 0.45rem 0.85rem;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  text-transform: none;
  color: var(--color-text-muted);
  text-decoration: none;
}

.site-lang-list a:hover {
  background: var(--color-locale-active-bg);
  color: var(--color-accent);
}

.site-lang-list a[aria-current="true"] {
  background: var(--color-locale-active-bg);
  color: var(--color-accent);
  font-weight: 600;
}

.site-header a:focus-visible,
.site-lang-toggle:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.site-lang-list a:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--color-accent);
}

.site-main {
  max-width: var(--content-max);
  margin-left: auto;
  margin-right: auto;
  padding: 1.5rem var(--page-pad) 2.5rem;
}

.site-main a {
  color: var(--color-accent);
}

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

.site-main input,
.site-main select,
.site-main textarea {
  width: 100%;
  margin-top: 0.3rem;
  padding: 0.48rem 0.62rem;
  font: inherit;
  font-size: 0.92rem;
  color: var(--color-text);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.site-main select {
  padding-right: 2rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='%234a5568'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.55rem center;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
}

.site-main input:focus-visible,
.site-main select:focus-visible,
.site-main textarea:focus-visible,
.site-main button:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.site-footer {
  max-width: var(--content-max);
  margin-left: auto;
  margin-right: auto;
  padding: 1.5rem var(--page-pad);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.site-footer p {
  margin: 0;
}

.hero {
  margin-bottom: 2rem;
}

@media (max-width: 42rem) {
  .site-header {
    flex-direction: column;
    align-items: stretch;
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
  }

  .site-brand {
    text-align: center;
  }

  .site-nav {
    justify-content: center;
  }

  .site-header-tools {
    flex-direction: column;
    align-items: stretch;
    justify-content: stretch;
  }

  .site-lang {
    align-self: flex-end;
  }

  .site-lang-dropdown {
    right: 0;
    left: auto;
  }
}

@media (max-width: 28rem) {
  .site-lang-toggle {
    font-size: 0.75rem;
    padding: 0.35rem 0.45rem 0.35rem 0.55rem;
  }
}