:root {
  --color-bg: #f6f2e8;
  --color-forest: #1f3a2e;
  --color-accent: #8a6a2e;
  --color-night: #0e1a14;
  --color-moss: #7fa88b;
  --color-mist: #efe9d9;
  --color-card: #fbf8ef;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow-soft: 0 16px 44px rgba(14, 26, 20, 0.16);
  --header-height: 76px;
  --container-max: 1200px;
  --section-space: clamp(5rem, 10vw, 8rem);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--color-forest);
  background: radial-gradient(circle at 10% 10%, #fcfaf3 0%, var(--color-bg) 55%, #ebe4d2 100%);
  font-family: "Noto Sans JP", "Hiragino Sans", sans-serif;
  line-height: 1.9;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

img {
  max-width: 100%;
  display: block;
}

main {
  overflow-x: clip;
}

.container {
  width: min(var(--container-max), 100% - clamp(2.5rem, 8vw, 6rem));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  transform: translateY(-150%);
  background: #fff;
  color: var(--color-forest);
  padding: 0.5rem 0.85rem;
  border-radius: 0.5rem;
  z-index: 2000;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1200;
  transition: background-color 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}

.site-header.is-scrolled,
.site-header.menu-open {
  background: rgba(246, 242, 232, 0.9);
  box-shadow: 0 12px 32px rgba(14, 26, 20, 0.14);
  backdrop-filter: blur(8px);
}

.nav-wrap {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  font-family: "Shippori Mincho", serif;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.brand img {
  width: 34px;
  height: 34px;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: clamp(0.4rem, 2vw, 1.2rem);
}

.site-nav a {
  text-decoration: none;
  font-size: 0.94rem;
  letter-spacing: 0.04em;
  padding: 0.45rem 0.6rem;
  border-radius: 999px;
  transition: background-color 0.25s ease, color 0.25s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: rgba(31, 58, 46, 0.1);
}

.site-nav .nav-cta {
  color: #fff;
  background: var(--color-accent);
}

.site-nav .nav-cta:hover,
.site-nav .nav-cta:focus-visible {
  background: #735723;
}

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(31, 58, 46, 0.3);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.85);
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-forest);
  margin: 4px auto;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle.is-open span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.section {
  padding-block: var(--section-space);
  position: relative;
}

.section-kicker {
  margin: 0 0 0.5rem;
  font-family: "Cormorant Garamond", serif;
  font-style: italic;
  font-size: clamp(1.4rem, 3vw, 2rem);
  color: var(--color-moss);
  letter-spacing: 0.04em;
}

.section-title {
  margin: 0;
  font-family: "Shippori Mincho", serif;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.5;
  letter-spacing: 0.08em;
  max-width: 22em;
}

.section-lead {
  margin: 1.25rem 0 0;
  max-width: 58ch;
  font-size: clamp(1rem, 1.4vw, 1.08rem);
}

.section-dark {
  color: var(--color-bg);
}

.hero {
  min-height: 100svh;
  background:
    linear-gradient(180deg, #0a120f 0%, #0e1a14 45%, #1b2f26 100%),
    radial-gradient(circle at 80% 20%, rgba(127, 168, 139, 0.22) 0%, transparent 50%);
  padding-block: 0;
  display: grid;
  align-items: center;
  isolation: isolate;
}

.hero-layers {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-layer {
  position: absolute;
  left: 50%;
  width: 125%;
  min-width: 1200px;
  transform: translateX(-50%);
  will-change: transform;
}

.layer-1 {
  bottom: 35%;
  opacity: 0.34;
}

.layer-2 {
  bottom: 27%;
  opacity: 0.45;
}

.layer-3 {
  bottom: 19%;
  opacity: 0.62;
}

.layer-4 {
  bottom: 11%;
  opacity: 0.78;
}

.layer-5 {
  bottom: 0;
  opacity: 0.95;
}

.hero-mist {
  position: absolute;
  inset: auto -15% -15% -15%;
  height: 42%;
  background:
    radial-gradient(circle at 20% 35%, rgba(239, 233, 217, 0.36) 0%, transparent 40%),
    radial-gradient(circle at 70% 60%, rgba(239, 233, 217, 0.3) 0%, transparent 45%),
    linear-gradient(180deg, transparent 0%, rgba(14, 26, 20, 0.52) 100%);
  filter: blur(8px);
  animation: mist-drift 28s linear infinite alternate;
  pointer-events: none;
}

@keyframes mist-drift {
  from {
    transform: translateX(-2%);
  }
  to {
    transform: translateX(2%);
  }
}

.hero-content {
  position: relative;
  z-index: 2;
  padding-top: clamp(5rem, 18vh, 11rem);
  padding-bottom: clamp(8rem, 20vh, 12rem);
}

.hero-kicker {
  margin: 0;
  font-family: "Cormorant Garamond", serif;
  font-size: clamp(1.2rem, 2.4vw, 1.7rem);
  letter-spacing: 0.08em;
  color: #d9cfb8;
}

.hero-title {
  margin: 0.3em 0 0;
  font-family: "Shippori Mincho", serif;
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: 0.08em;
  font-size: clamp(2.6rem, 7vw, 5.4rem);
}

.title-line {
  display: block;
}

.hero-copy {
  margin: 1.4rem 0 0;
  max-width: 58ch;
  color: #ece2cd;
  font-size: clamp(1rem, 1.6vw, 1.1rem);
}

.hero-actions {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border-radius: 999px;
  padding: 0.75rem 1.3rem;
  border: 1px solid transparent;
  font-weight: 600;
  letter-spacing: 0.03em;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:focus-visible {
  outline: 3px solid #fff;
  outline-offset: 2px;
}

.btn-primary {
  color: #fff;
  background: var(--color-accent);
  box-shadow: 0 10px 24px rgba(138, 106, 46, 0.35);
}

.btn-primary:hover {
  background: #735723;
}

.btn-ghost {
  color: var(--color-bg);
  border-color: rgba(246, 242, 232, 0.55);
  background: rgba(246, 242, 232, 0.08);
}

.btn-ghost:hover {
  background: rgba(246, 242, 232, 0.18);
}

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: clamp(1rem, 3vh, 1.8rem);
  transform: translateX(-50%);
  font-family: "Cormorant Garamond", serif;
  letter-spacing: 0.2em;
  font-size: 0.95rem;
  opacity: 0.76;
  animation: cue-bob 1.9s ease-in-out infinite;
}

.scroll-cue::after {
  content: "";
  display: block;
  width: 1px;
  height: 26px;
  margin: 0.35rem auto 0;
  background: rgba(246, 242, 232, 0.75);
}

@keyframes cue-bob {
  0%,
  100% {
    transform: translate(-50%, 0);
  }
  50% {
    transform: translate(-50%, 4px);
  }
}

.noscript-note {
  margin: 0;
  padding: 0.8rem 1rem;
  background: #ece6d8;
  text-align: center;
}

.concept {
  background:
    linear-gradient(160deg, rgba(239, 233, 217, 0.9) 0%, rgba(246, 242, 232, 1) 45%, rgba(232, 225, 207, 0.82) 100%);
}

.concept-grid {
  display: grid;
  grid-template-columns: minmax(150px, 240px) minmax(0, 1fr);
  gap: clamp(1.4rem, 4vw, 4.5rem);
  align-items: start;
}

.concept-tag {
  margin: 0;
  font-family: "Shippori Mincho", serif;
  font-size: clamp(1rem, 2.1vw, 1.3rem);
  color: rgba(31, 58, 46, 0.78);
  writing-mode: vertical-rl;
  letter-spacing: 0.18em;
  justify-self: center;
}

.learn {
  background: radial-gradient(circle at 95% 5%, #efe7d6 0%, #f6f2e8 45%, #ece3cd 100%);
}

.learn-grid {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(0.9rem, 2vw, 1.4rem);
}

.learn-card {
  background: color-mix(in srgb, var(--color-card) 92%, white 8%);
  border: 1px solid rgba(31, 58, 46, 0.12);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  overflow: clip;
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 100%;
}

.learn-body {
  padding: 1rem 1rem 1.2rem;
}

.learn-title {
  margin: 0;
  font-family: "Cormorant Garamond", serif;
  font-size: 1.8rem;
  letter-spacing: 0.04em;
}

.learn-body p {
  margin: 0.6rem 0 0;
  font-size: 0.95rem;
}

.media-frame {
  background: #d6ddcf;
  position: relative;
}

.media-frame img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.media-frame.is-fallback {
  min-height: 200px;
  display: grid;
  place-items: center;
}

.media-frame.is-fallback img {
  display: none;
}

.media-frame.is-fallback::after {
  content: attr(data-fallback);
  color: var(--color-forest);
  font-size: 0.92rem;
  line-height: 1.6;
  text-align: center;
  padding: 1rem;
}

.kamiyama {
  color: var(--color-bg);
  background:
    linear-gradient(180deg, #12231b 0%, #102019 45%, #0e1914 100%),
    radial-gradient(circle at 15% 80%, rgba(127, 168, 139, 0.2) 0%, transparent 55%);
}

.kamiyama .section-kicker,
.kamiyama .section-lead {
  color: #d4c9b3;
}

.kamiyama .section-title {
  color: #f2ead8;
}

.section-head {
  margin-bottom: 2rem;
}

.kamiyama-pin {
  position: relative;
}

.kamiyama-track {
  display: flex;
  gap: clamp(0.8rem, 2vw, 1.3rem);
  padding-inline: max(1.2rem, calc((100vw - var(--container-max)) / 2));
  width: max-content;
  will-change: transform;
}

.gallery-card {
  width: min(78vw, 470px);
  border-radius: var(--radius-lg);
  overflow: clip;
  border: 1px solid rgba(246, 242, 232, 0.2);
  background: rgba(246, 242, 232, 0.08);
  backdrop-filter: blur(4px);
}

.gallery-card img {
  aspect-ratio: 4 / 5;
}

.gallery-card figcaption {
  padding: 0.7rem 0.95rem;
  font-family: "Cormorant Garamond", serif;
  font-size: 1.3rem;
  letter-spacing: 0.06em;
}

.admission {
  background:
    linear-gradient(170deg, #f6f2e8 0%, #eee6d4 48%, #f3ecdc 100%),
    radial-gradient(circle at 85% 70%, rgba(138, 106, 46, 0.14) 0%, transparent 50%);
}

.admission-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  gap: clamp(1rem, 3vw, 2.5rem);
  align-items: start;
}

.admission-actions {
  margin-top: 1.7rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.admission .btn-ghost {
  color: var(--color-forest);
  border-color: rgba(31, 58, 46, 0.3);
  background: rgba(31, 58, 46, 0.04);
}

.access-card {
  border: 1px solid rgba(31, 58, 46, 0.22);
  border-radius: var(--radius-lg);
  padding: clamp(1rem, 2.5vw, 1.6rem);
  background: rgba(255, 255, 255, 0.52);
  box-shadow: var(--shadow-soft);
}

.access-card h3 {
  margin: 0 0 0.5rem;
  font-family: "Shippori Mincho", serif;
  font-size: 1.2rem;
}

.access-card p {
  margin: 0;
}

.access-sub {
  margin-top: 0.8rem;
  font-size: 0.9rem;
  opacity: 0.78;
}

.site-footer {
  background: #132219;
  color: #e9dfca;
  padding-block: clamp(2.2rem, 6vw, 3rem);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr repeat(2, minmax(0, 1fr));
  gap: clamp(1.2rem, 3vw, 2rem);
}

.footer-brand {
  margin: 0;
  font-family: "Shippori Mincho", serif;
  font-size: 1.2rem;
  letter-spacing: 0.06em;
}

.site-footer h3 {
  margin: 0;
  font-family: "Cormorant Garamond", serif;
  font-size: 1.5rem;
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0.7rem 0 0;
}

.site-footer li + li {
  margin-top: 0.4rem;
}

.site-footer a {
  color: #f3e9d3;
}

.js .reveal-item {
  will-change: transform, opacity;
}

@media (max-width: 1023.98px) {
  .hero-layer {
    min-width: 900px;
  }

  .concept-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .concept-tag {
    writing-mode: horizontal-tb;
    justify-self: start;
    opacity: 0.8;
    letter-spacing: 0.06em;
  }

  .learn-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .admission-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767.98px) {
  .container {
    width: min(var(--container-max), 100% - 2rem);
  }

  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    position: absolute;
    top: calc(var(--header-height) - 4px);
    left: 0;
    right: 0;
    margin: 0;
    display: grid;
    gap: 0.4rem;
    background: rgba(246, 242, 232, 0.96);
    backdrop-filter: blur(8px);
    border-top: 1px solid rgba(31, 58, 46, 0.12);
    max-height: 0;
    overflow: hidden;
    padding: 0;
    transition: max-height 0.35s ease, padding 0.35s ease;
  }

  .site-nav a {
    margin-inline: 1rem;
    padding: 0.7rem 0.8rem;
  }

  .site-nav.is-open {
    max-height: 380px;
    padding: 0.8rem 0 1rem;
  }

  .hero-content {
    padding-top: 8.5rem;
  }

  .hero-copy {
    max-width: 38ch;
  }

  .scroll-cue {
    letter-spacing: 0.14em;
    font-size: 0.8rem;
  }

  .learn-grid {
    grid-template-columns: 1fr;
  }

  .kamiyama-track {
    width: auto;
    padding-inline: 1rem;
    display: grid;
    grid-template-columns: 1fr;
  }

  .gallery-card {
    width: auto;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .hero-mist,
  .scroll-cue {
    animation: none !important;
  }
}