/* Shared: base, header, CONTACT band, footer, opening */

/* Base */
:root {
  --red: #d30104;
  --ink: #161616;
  --paper: #f5f3ef;
  --serif: "Yu Mincho", "Hiragino Mincho ProN", "Noto Serif JP", serif;
  --sans: "Yu Gothic", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: var(--sans);
  font-feature-settings: "palt";
}
img {
  display: block;
  width: 100%;
}
a {
  text-decoration: none;
  color: inherit;
}
/* Header (PC) */
header {
  position: fixed;
  z-index: 80;
  top: 0;
  left: 0;
  right: 0;
  transform: translateY(-100%);
  transition: 0.6s ease;
}
header.show {
  transform: none;
}
.frame-header {
  height: 94px;
  padding: 0 3.2vw;
  background: transparent !important;
  backdrop-filter: none !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.28) !important;
  color: #fff;
  transition:
    transform 0.6s ease,
    background 0.45s ease,
    color 0.45s ease,
    border-color 0.45s ease;
  display: grid;
  grid-template-columns: 140px 1fr auto;
  gap: 28px;
  align-items: center;
}
.frame-header:before,
.frame-header:after {
  content: "";
  position: fixed;
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(255, 255, 255, 0.18);
  pointer-events: none;
  transition: 0.45s;
}
.frame-header:before {
  left: 3.2vw;
}
.frame-header:after {
  right: 3.2vw;
}
.frame-header .logo {
  width: 54px;
  height: 54px;
  display: block;
  position: relative;
  z-index: 2;
  margin-left: 18px;
}
.frame-header .logo img {
  position: absolute;
  inset: 0;
  width: 54px;
  height: 54px;
  object-fit: contain;
  object-position: center;
  background: transparent !important;
  padding: 0 !important;
  transition: opacity 0.35s ease;
}
.frame-header .logo .logo-light {
  opacity: 1;
}
.frame-header .logo .logo-dark {
  opacity: 0;
}
.header-mark {
  font:
    9px/1.45 Georgia,
    serif;
  letter-spacing: 0.25em;
  opacity: 0.68;
  align-self: center;
  border-left: 1px solid rgba(255, 255, 255, 0.35);
  padding-left: 20px;
}
.frame-nav {
  height: 100%;
  display: flex;
  gap: 0 !important;
  align-items: stretch !important;
  font-size: 12px;
  letter-spacing: 0.08em;
}
.frame-nav > a {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 19px;
  border-left: 1px solid rgba(255, 255, 255, 0.18);
  transition: 0.35s;
}
.frame-nav > a:last-child {
  border-right: 1px solid rgba(255, 255, 255, 0.18);
}
.frame-nav b {
  font:
    10px Georgia,
    serif;
  color: var(--red);
  font-weight: 400;
  align-self: flex-start;
  margin-top: 29px;
}
.frame-nav span {
  font:
    11px Georgia,
    serif;
  letter-spacing: 0.15em;
  line-height: 1.1;
}
.frame-nav small {
  display: block;
  font: 9px var(--sans);
  letter-spacing: 0.08em;
  margin-top: 7px;
  opacity: 0.62;
}
.frame-nav > a:hover {
  background: rgba(255, 255, 255, 0.1);
}
.contact-nav {
  color: inherit !important;
  padding-left: 19px !important;
}
.frame-nav a.is-current {
  background: rgba(255, 255, 255, 0.07);
}
.menu-toggle {
  display: none;
}
.frame-header.scrolled {
  background: rgba(250, 249, 246, 0.96) !important;
  color: #171717;
  border-bottom-color: rgba(0, 0, 0, 0.12) !important;
  backdrop-filter: blur(16px) !important;
}
.frame-header.scrolled:before,
.frame-header.scrolled:after {
  background: rgba(0, 0, 0, 0.09);
}
.frame-header.scrolled .header-mark {
  border-color: rgba(0, 0, 0, 0.18);
}
.frame-header.scrolled .frame-nav > a {
  border-color: rgba(0, 0, 0, 0.09);
}
.frame-header.scrolled .frame-nav > a:hover {
  background: rgba(0, 0, 0, 0.035);
}
.frame-header.scrolled .logo .logo-light {
  opacity: 0;
}
.frame-header.scrolled .logo .logo-dark {
  opacity: 1;
}
/* CONTACT band (TOP) */
.contact.contact-red {
  position: relative;
  overflow: hidden;
  padding: 52px 9vw 56px;
  background: #fff;
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 7vw;
}
.contact-red .contact-copy {
  position: relative;
  z-index: 2;
  max-width: 760px;
}
.contact-red .small-en {
  color: var(--red);
  margin-bottom: 18px;
}
.contact-red .contact-catch {
  letter-spacing: 0.04em;
  margin: 0 0 14px;
  color: var(--ink);
}
.contact-red .contact-title {
  font-family: var(--serif);
  font-size: clamp(18px, 1.55vw, 25px);
  font-weight: 400;
  letter-spacing: 0.05em;
  margin: 0;
  color: var(--ink);
}
.contact-red .contact-btn {
  position: relative;
  z-index: 2;
  width: min(420px, 38vw);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(0, 0, 0, 0.42);
  border-bottom: 1px solid rgba(0, 0, 0, 0.42);
  padding: 20px 4px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ink);
}
.contact-red .contact-btn span {
  font-size: 24px;
  color: var(--red);
  transition: transform 0.3s ease;
}
.contact-red .contact-btn:hover span {
  transform: translate(4px, -4px);
}
/* Footer */
footer {
  background: var(--red);
  color: #fff;
  padding: 55px 5vw 35px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 35px;
  align-items: end;
}
footer img {
  width: 58px;
}
footer div {
  display: flex;
  gap: 28px;
  letter-spacing: 0.08em;
}
footer small {
  grid-column: 1/3;
  font:
    9px Georgia,
    serif;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.72);
}
@media (max-width: 800px) {
  .contact.contact-red {
    padding: 90px 8vw 95px;
    display: block;
  }
  .contact-red .contact-title {
    font-size: 6vw;
  }
  .contact-red .contact-btn {
    width: 100%;
    margin-top: 58px;
  }
  footer div {
    display: none;
  }
}
footer div {
  font-size: 14px;
}
footer div a {
  position: relative;
}
footer div a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -7px;
  width: 100%;
  height: 1px;
  background: #fff;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
footer div a:hover::after {
  transform: scaleX(1);
}
/* Header (mobile) */
@media (max-width: 980px) {
  .frame-header {
    background: transparent !important;
  }
  .frame-header .logo {
    z-index: 4;
  }
  .menu-toggle {
    cursor: pointer;
    transition:
      border-color 0.35s ease,
      color 0.35s ease;
  }
  .menu-toggle span {
    transition:
      transform 0.38s cubic-bezier(0.22, 0.75, 0.2, 1),
      top 0.38s cubic-bezier(0.22, 0.75, 0.2, 1);
  }
  .mobile-menu-links a:active {
    background: rgba(0, 0, 0, 0.025);
  }
  .mobile-menu-links a:active i {
    transform: translate(3px, -3px);
  }
}
@media (prefers-reduced-motion: reduce) {
  .mobile-menu,
  .mobile-menu-links a,
  .menu-toggle span {
    transition: none !important;
  }
}
@media (max-width: 800px) {
  footer {
    height: 74px;
    min-height: 74px;
    padding: 0 6vw;
    grid-template-columns: 1fr auto;
    gap: 20px;
    align-items: center;
  }
  footer > img {
    grid-column: 1;
    grid-row: 1;
    width: 48px;
    height: 48px;
    object-fit: contain;
    align-self: center;
  }
  footer small {
    grid-column: 2;
    grid-row: 1;
    align-self: center;
    text-align: right;
    white-space: nowrap;
  }
}
/* Opening: shown once per tab/session */
.opening {
  position: fixed;
  inset: 0;
  background: #fff;
  z-index: 999;
  display: grid;
  place-items: center;
  opacity: 1;
  visibility: visible;
  transition:
    opacity 0.72s ease,
    visibility 0s linear 0.72s;
}
.opening.hide {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.opening img {
  width: 116px;
  display: block;
  object-fit: contain;
  background: transparent !important;
}
html.opening-seen .opening {
  display: none;
}
@media (max-width: 768px) {
  .opening img {
    width: 96px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .opening {
    transition: none !important;
  }
}