/* Hallmark · component: fixed site header · genre: corporate modern-minimal · theme: locked Hida system
 * pre-emit critique: P5 H5 E5 S5 R5 V5 · contrast: pass · mobile: 320 / 375 / 414 / 768
 */
:root {
  --site-header-font: "Noto Sans JP", "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  --site-header-latin: Arial, sans-serif;
  --site-header-height: 88px;
  --site-header-inner-width: 85rem;
  --site-content-width: 73.75rem;
  --site-side-gutter: 1.5rem;
  --site-page-top-space: clamp(4rem, 6vw, 5.5rem);
}
.site-header.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  height: var(--site-header-height);
  color: var(--ink);
  background: color-mix(in srgb, var(--paper) 96%, transparent);
  border-bottom: 1px solid var(--line, var(--rule));
  backdrop-filter: blur(12px);
  font-family: var(--site-header-font);
}

body > .site-header + main { padding-block-start: var(--site-header-height); }

.site-header .header-inner {
  width: min(var(--site-header-inner-width), calc(100% - (2 * var(--site-side-gutter))));
  height: 100%;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: clamp(1rem, 2vw, 2rem);
}

.site-header .logo {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  color: inherit;
  text-decoration: none;
  white-space: nowrap;
}

.site-header .logo-mark {
  width: 3.625rem;
  height: 3.625rem;
  flex: 0 0 3.625rem;
  object-fit: contain;
}

.site-header .logo-copy { display: grid; min-width: 0; gap: .125rem; line-height: 1; }
.site-header .logo-copy strong { font-size: 1rem; line-height: 1.15; letter-spacing: .04em; white-space: nowrap; }
.site-header .logo-copy small { font-family: var(--site-header-latin); font-size: .5625rem; line-height: 1; letter-spacing: .16em; white-space: nowrap; }

.site-header .desktop-nav {
  margin-inline-start: auto;
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2vw, 2rem);
}

.site-header .desktop-nav > a {
  position: relative;
  color: inherit;
  font-size: .91rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
}

.site-header .desktop-nav > a:not(.button):not(.header-contact)::after {
  position: absolute;
  right: 0;
  bottom: -.75rem;
  left: 0;
  height: 2px;
  content: "";
  background: var(--tomato);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.site-header .desktop-nav > a:not(.button):not(.header-contact):hover::after,
.site-header .desktop-nav > a:not(.button):not(.header-contact)[aria-current="page"]::after { transform: scaleX(1); }

.site-header .desktop-nav > .button,
.site-header .desktop-nav > .header-contact {
  min-height: 3rem;
  padding: .8rem 1.35rem;
  display: inline-flex;
  align-items: center;
  gap: .8rem;
  border: 1px solid var(--ink);
  border-radius: 999px;
  color: var(--paper);
  background: var(--ink);
  font-size: .91rem;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  transition: color 160ms ease, background 160ms ease, border-color 160ms ease, transform 120ms ease;
}
.site-header .desktop-nav > .button::after,
.site-header .desktop-nav > .header-contact::after { content: "→"; font-family: var(--site-header-latin); }
.site-header .desktop-nav > .button:hover,
.site-header .desktop-nav > .header-contact:hover { color: var(--paper); background: var(--tomato-dark); border-color: var(--tomato-dark); }
.site-header .desktop-nav > .button:active,
.site-header .desktop-nav > .header-contact:active { transform: translateY(1px); }

.site-header .header-tools,
.site-header .a-header-tools {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: .65rem;
}

.site-header .language { position: relative; }
.site-header .language-button .visually-hidden,
.standalone-language .language-button .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.site-header .language-button {
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--line, var(--rule));
  border-radius: 50%;
  color: var(--ink);
  background: transparent;
  font: inherit;
  font-size: .88rem;
  font-weight: 800;
  cursor: pointer;
  transition: color 160ms ease, background 160ms ease, border-color 160ms ease;
}

.site-header .language-button:hover,
.site-header .language-button[aria-expanded="true"] {
  color: var(--paper);
  background: var(--ink);
  border-color: var(--ink);
}
.site-header .language-button:active { transform: translateY(1px); }

.site-header .language-button:focus-visible,
.site-header .menu-toggle:focus-visible,
.site-header a:focus-visible {
  outline: 3px solid var(--tomato);
  outline-offset: 4px;
}

.site-header .language-menu {
  position: absolute;
  top: calc(100% + .65rem);
  right: 0;
  width: min(20rem, calc(100vw - 2rem));
  max-height: min(34rem, calc(100dvh - 7rem));
  padding: .45rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .15rem;
  overflow-y: auto;
  border: 1px solid var(--line, var(--rule));
  background: var(--paper);
  box-shadow: 0 1rem 2.5rem color-mix(in srgb, var(--ink) 14%, transparent);
}

.site-header .language-menu[hidden] { display: none; }
.site-header .language-menu button {
  width: 100%;
  padding: .7rem .75rem;
  border: 0;
  color: var(--ink);
  background: transparent;
  font: inherit;
  font-size: .84rem;
  font-weight: 700;
  text-align: left;
  white-space: nowrap;
  cursor: pointer;
}
.site-header .language-menu button:hover,
.site-header .language-menu button[aria-pressed="true"] { background: var(--cream, var(--paper-2)); }
.site-header .language-menu button[aria-pressed="true"]::after { float: right; content: "✓"; }
.site-header .language-menu button:disabled { opacity: .45; cursor: not-allowed; }
.site-header .language-button[aria-busy="true"] { cursor: progress; }
.site-header .language.has-error .language-button { border-color: var(--tomato); }
.site-header .language.is-success .language-button { border-color: var(--green, var(--leaf)); }

.site-header .menu-toggle {
  position: relative;
  display: none;
  width: 3rem;
  height: 3rem;
  padding: 0;
  flex: 0 0 3rem;
  border: 1px solid var(--line, var(--rule));
  border-radius: 50%;
  color: var(--ink);
  background: var(--paper);
  cursor: pointer;
}
.site-header .menu-toggle span {
  position: absolute;
  top: 50%;
  left: 50%;
  display: block;
  width: 1.25rem;
  height: 2px;
  margin: 0;
  background: currentColor;
  transition: opacity 160ms ease, transform 160ms ease;
}
.site-header .menu-toggle span:first-child { transform: translate(-50%, calc(-50% - .4375rem)); }
.site-header .menu-toggle span:nth-child(2) { transform: translate(-50%, -50%); }
.site-header .menu-toggle span:last-child { transform: translate(-50%, calc(-50% + .4375rem)); }
.site-header .menu-toggle[aria-expanded="true"] span:first-child { transform: translate(-50%, -50%) rotate(45deg); }
.site-header .menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.site-header .menu-toggle[aria-expanded="true"] span:last-child { transform: translate(-50%, -50%) rotate(-45deg); }
.site-header .menu-toggle:hover { color: var(--paper); background: var(--ink); border-color: var(--ink); }
.site-header .menu-toggle:active { transform: translateY(1px); }
.site-header .menu-toggle:disabled { opacity: .55; cursor: not-allowed; }
.site-header .mobile-nav {
  position: absolute;
  inset: 100% 0 auto;
  display: none;
  height: calc(100dvh - var(--site-header-height));
  padding: 1rem var(--site-side-gutter) 2rem;
  overflow-y: auto;
  border-bottom: 1px solid var(--line, var(--rule));
  background: var(--paper);
}
.site-header .mobile-nav.is-open { display: grid; align-content: start; }
.site-header .mobile-nav a {
  min-height: 3.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line, var(--rule));
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}
.site-header .mobile-nav a > span { display: none; }
.site-header .mobile-nav a::after { margin-inline-start: auto; content: "→"; }

@media (max-width: 1120px) {
  .site-header .desktop-nav { gap: 1rem; }
  .site-header .desktop-nav > a { font-size: .82rem; }
  .site-header .desktop-nav > .button,
  .site-header .desktop-nav > .header-contact { padding-inline: 1rem; }
}

@media (max-width: 900px) {
  .site-header .header-inner { justify-content: space-between; }
  .site-header .desktop-nav { display: none; }
  .site-header .header-tools,
  .site-header .a-header-tools { margin-inline-start: auto; }
  .site-header .menu-toggle { display: inline-grid; }
}

@media (max-width: 640px) {
  :root {
    --site-header-height: 74px;
    --site-side-gutter: .875rem;
    --site-page-top-space: 3rem;
  }
  .site-header .header-inner { width: calc(100% - 1.75rem); gap: .65rem; }
  .site-header .logo { gap: .45rem; }
  .site-header .logo-mark { width: 3rem; height: 3rem; flex-basis: 3rem; }
  .site-header .logo-copy strong { font-size: .82rem; }
  .site-header .logo-copy small { font-size: .47rem; }
  .site-header .language-button { width: 2.45rem; height: 2.45rem; }
  .site-header .menu-toggle { width: 2.75rem; height: 2.75rem; flex-basis: 2.75rem; }
}

@media (max-width: 390px) {
  .site-header .logo-copy small { display: none; }
  .site-header .logo-copy strong { font-size: .76rem; }
  .site-header .language-menu { width: min(18rem, calc(100vw - 1.25rem)); }
}

@media (prefers-reduced-motion: reduce) {
  .site-header *, .site-header *::before, .site-header *::after { transition-duration: .01ms !important; }
}

.standalone-language {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 1001;
}
.standalone-language .language-button {
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--line, var(--rule));
  border-radius: 50%;
  color: var(--ink);
  background: var(--paper);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}
.standalone-language .language-menu {
  position: absolute;
  top: calc(100% + .5rem);
  right: 0;
  width: 12rem;
  padding: .45rem;
  display: grid;
  gap: .15rem;
  border: 1px solid var(--line, var(--rule));
  background: var(--paper);
  box-shadow: 0 1rem 2.5rem color-mix(in srgb, var(--ink) 14%, transparent);
}
.standalone-language .language-menu[hidden] { display: none; }
.standalone-language .language-menu button {
  padding: .7rem .75rem;
  border: 0;
  color: var(--ink);
  background: transparent;
  font: inherit;
  font-weight: 700;
  text-align: left;
  white-space: nowrap;
  cursor: pointer;
}
.standalone-language .language-menu button:hover,
.standalone-language .language-menu button[aria-pressed="true"] { background: var(--cream, var(--paper-2)); }