/* Shared site header for every page except index.html.
   Edit here to change the header everywhere. */

:root {
  --bv-header-height: 3.75rem;
  --bv-wine: #ad0220;
  --bv-wine-dark: #790116;
  --bv-ease: 280ms cubic-bezier(.2, .7, .2, 1);
}

body {
  padding-top: var(--bv-header-height);
}

body.bv-menu-open {
  overflow: hidden;
}

.bv-header {
  position: fixed;
  z-index: 90;
  top: 0;
  right: 0;
  left: 0;
  display: flex;
  height: var(--bv-header-height);
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
  color: #fff;
  background: #0d0d0d;
}

.bv-header__brand {
  display: block;
}

.bv-header__brand img {
  display: block;
  width: 2.75rem;
  height: auto;
}

.bv-header__controls {
  display: flex;
  align-items: center;
  gap: .6rem;
}

.bv-lang-toggle,
.bv-menu-toggle {
  display: grid;
  height: 2.75rem;
  place-items: center;
  color: #fff;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .35);
  border-radius: 999px;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  font: inherit;
}

.bv-lang-toggle {
  min-width: 2.75rem;
  padding: 0 .3rem;
  font-family: "Oswald", "Noto Sans JP", sans-serif;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .04em;
}

.bv-menu-toggle {
  width: 2.75rem;
}

.bv-menu-toggle span,
.bv-menu-toggle span::before,
.bv-menu-toggle span::after {
  display: block;
  width: 1rem;
  height: 1px;
  background: currentColor;
  transition: transform var(--bv-ease), opacity var(--bv-ease);
  content: "";
}

.bv-menu-toggle span { position: relative; }
.bv-menu-toggle span::before { position: absolute; top: -.32rem; }
.bv-menu-toggle span::after { position: absolute; top: .32rem; }

.bv-menu-open .bv-menu-toggle span { background: transparent; }
.bv-menu-open .bv-menu-toggle span::before { top: 0; transform: rotate(45deg); }
.bv-menu-open .bv-menu-toggle span::after { top: 0; transform: rotate(-45deg); }

.bv-drawer {
  position: fixed;
  z-index: 80;
  inset: 0;
  display: grid;
  align-content: center;
  padding: 5rem 1.5rem;
  color: #fff;
  background: rgba(0, 0, 0, .97);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-1rem);
  transition: opacity var(--bv-ease), visibility var(--bv-ease), transform var(--bv-ease);
  overflow-y: auto;
}

.bv-menu-open .bv-drawer {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.bv-drawer nav {
  display: grid;
  gap: .65rem;
}

.bv-drawer nav a {
  padding: .45rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, .14);
  color: #fff;
  font-family: "Oswald", "Noto Sans JP", sans-serif;
  font-size: clamp(2.1rem, 10vw, 4rem);
  line-height: 1;
  text-decoration: none;
}

.bv-drawer__meta {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 2rem;
}

.bv-button {
  display: inline-flex;
  min-height: 3rem;
  align-items: center;
  justify-content: center;
  padding: .85rem 1.2rem;
  color: #fff;
  background: var(--bv-wine);
  border: 1px solid var(--bv-wine);
  border-radius: 999px;
  font-family: "Noto Sans JP", system-ui, sans-serif;
  font-size: .86rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--bv-ease), border-color var(--bv-ease);
}

.bv-button:hover { background: var(--bv-wine-dark); border-color: var(--bv-wine-dark); }

.bv-button--ghost {
  color: #fff;
  background: transparent;
  border-color: rgba(255, 255, 255, .68);
}

.bv-button--ghost:hover { color: #0d0d0d; background: #fff; border-color: #fff; }

@media (prefers-reduced-motion: reduce) {
  .bv-drawer,
  .bv-menu-toggle span,
  .bv-menu-toggle span::before,
  .bv-menu-toggle span::after,
  .bv-button {
    transition: none;
  }
}