:root {
  --bg: #FFFFFF;
  --bg-alt: #F6F4EF;
  --ink: #242019;
  --ink-soft: #524A3E;
  --copper: #B43B41;
  --copper-bright: #9E3036;
  --patina: #5B7F73;
  --patina-deep: #3F5C53;
  --card-bg: #FBFAF7;
  --line: rgba(36,32,25,0.12);
  --font-serif: "Yu Gothic Medium", "YuGothic", "Yu Gothic", "Noto Sans JP", sans-serif;
  --font-sans: "Noto Sans JP", sans-serif;
}
:root {
  color-scheme: light;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
.wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}
/* ---------- NAV ---------- */
header.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 0;
}
.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 18px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  text-decoration: none;
  display: flex;
  align-items: center;
}
.logo-plate {
  display: inline-flex;
  align-items: center;
}
.logo-plate img {
  height: 60px;
  width: auto;
  display: block;
}
@media (max-width: 480px) {
  .logo-plate img {
    height: 40px;
  }
}
nav.links {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 30px;
  font-size: 16px;
  flex: 1;
}
nav.links a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 3px;
  white-space: nowrap;
  transition: color .2s, border-color .2s;
}
nav.links a:hover {
  color: var(--copper);
  border-color: var(--copper);
}


.menu-toggle {
  display: none;
}
.menu-toggle:focus-visible, nav.links a:focus-visible {
  outline: 2px solid var(--copper);
  outline-offset: 4px;
}
section[id], #top {
  scroll-margin-top: var(--header-height, 96px);
}
@media (min-width: 781px) and (max-width: 1100px) {
  .logo-plate img {
    height: 44px;
  }
  nav.links {
    gap: 16px;
    font-size: 14px;
  }
  .nav-inner {
    gap: 20px;
    padding-left: 24px;
    padding-right: 24px;
  }
}
@media (max-width: 780px) {
  .nav-inner {
    flex-wrap: wrap;
    gap: 16px;
    padding: 14px 20px;
  }
  .brand {
    flex: 1;
    min-width: 0;
  }
  .logo-plate img {
    width: min(100%, 300px);
    height: auto;
    max-height: 50px;
    object-fit: contain;
  }
  .menu-toggle:not([hidden]) {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-width: 52px;
    min-height: 48px;
    padding: 4px;
    border: 0;
    background: transparent;
    color: var(--ink);
    font: inherit;
    font-size: 10px;
    line-height: 1.2;
    cursor: pointer;
  }
  .menu-icon {
    position: relative;
    display: block;
    width: 24px;
    height: 18px;
  }
  .menu-icon span {
    position: absolute;
    left: 0;
    width: 24px;
    height: 2px;
    background: currentColor;
  }
  .menu-icon span:nth-child(1) {
    top: 0;
  }
  .menu-icon span:nth-child(2) {
    top: 8px;
  }
  .menu-icon span:nth-child(3) {
    top: 16px;
  }
  .menu-toggle[aria-expanded="true"] .menu-icon span:nth-child(1) {
    top: 8px;
    transform: rotate(45deg);
  }
  .menu-toggle[aria-expanded="true"] .menu-icon span:nth-child(2) {
    opacity: 0;
  }
  .menu-toggle[aria-expanded="true"] .menu-icon span:nth-child(3) {
    top: 8px;
    transform: rotate(-45deg);
  }
  nav.links {
    flex: 0 0 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 4px 0 8px;
  }
  .nav-inner.menu-ready nav.links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: flex;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-14px);
    transition: opacity 380ms ease, transform 480ms cubic-bezier(0.22, 1, 0.36, 1), visibility 0s linear 480ms;
    padding: 16px 24px 24px;
    background: rgba(255, 255, 255, 0.86);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
    box-shadow: 0 10px 24px rgba(36, 32, 25, 0.10);
    max-height: calc(100dvh - 90px);
    overflow-y: auto;
    overscroll-behavior: contain;
  }
  .nav-inner.menu-open nav.links {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
    transition-delay: 0s;
  }
  .menu-icon span {
    transition: transform 180ms ease, top 180ms ease, opacity 120ms ease;
  }
  @media (prefers-reduced-motion: reduce) {
    .nav-inner.menu-ready nav.links {
      transition: none;
      transform: none;
    }
    .menu-icon span {
      transition: none;
    }
  }
  nav.links a {
    padding: 12px 4px;
    min-height: 48px;
  }

}

footer {
  padding: 40px 0;
  font-size: 13px;
  color: var(--ink-soft);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
/* Shared alignment for header and page content. */
:root { --page-gutter: 32px; }
.nav-inner, .wrap, .gallery-page .wrap {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--page-gutter);
  padding-right: var(--page-gutter);
}
@media (max-width: 780px) {
  :root { --page-gutter: 20px; }
}

button, a { -webkit-tap-highlight-color: transparent; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

.footer-inner { display: flex; justify-content: space-between; width: 100%; flex-wrap: wrap; gap: 12px; }