:root {
  color-scheme: light;
  --ink: #171714;
  --paper: #f4f0e8;
  --signal: #ff5c35;
  --line: rgba(23, 23, 20, 0.18);
  --muted: #68675f;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", Arial, sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 4px;
}

.gallery-shell {
  width: min(100% - 40px, 1440px);
  margin-inline: auto;
}

.gallery-header {
  position: sticky;
  z-index: 30;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(14px);
}

.gallery-brand {
  font-weight: 900;
  letter-spacing: -0.05em;
  text-decoration: none;
}

.gallery-brand span {
  color: var(--signal);
}

.gallery-nav {
  display: flex;
  gap: clamp(16px, 3vw, 40px);
  align-items: center;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.gallery-nav a {
  text-decoration-thickness: 1px;
  text-underline-offset: 5px;
}

.gallery-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(250px, 0.5fr);
  gap: clamp(40px, 8vw, 120px);
  padding-block: clamp(80px, 12vw, 170px) clamp(70px, 10vw, 130px);
  border-bottom: 1px solid var(--line);
}

.gallery-kicker,
.collection-label,
.concept-type {
  margin: 0 0 18px;
  color: var(--signal);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.gallery-hero h1 {
  max-width: 1040px;
  margin: 0;
  font-size: clamp(3.4rem, 9.5vw, 10rem);
  font-weight: 900;
  letter-spacing: -0.085em;
  line-height: 0.84;
}

.gallery-hero h1 em {
  display: block;
  color: transparent;
  font-style: normal;
  -webkit-text-stroke: 1.5px var(--ink);
}

.gallery-intro {
  align-self: end;
}

.gallery-intro p {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 0.95rem;
}

.gallery-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--line);
}

.gallery-facts div {
  padding: 16px;
  background: var(--paper);
}

.gallery-facts strong,
.gallery-facts span {
  display: block;
}

.gallery-facts strong {
  font-size: 1.55rem;
  line-height: 1;
}

.gallery-facts span {
  margin-top: 5px;
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.collection {
  padding-block: clamp(72px, 9vw, 132px);
}

.collection + .collection {
  border-top: 1px solid var(--line);
}

.collection-heading {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: end;
  margin-bottom: clamp(36px, 5vw, 70px);
}

.collection-heading h2 {
  margin: 0;
  font-size: clamp(2.6rem, 6vw, 6rem);
  letter-spacing: -0.07em;
  line-height: 0.9;
}

.collection-heading p:last-child {
  max-width: 430px;
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(26px, 4vw, 64px) clamp(18px, 2.8vw, 42px);
}

.concept-card {
  grid-column: span 4;
  min-width: 0;
}

.concept-card:nth-child(2) {
  margin-top: clamp(0px, 6vw, 90px);
}

.concept-visual {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 5;
  margin-bottom: 24px;
  border-radius: 2px;
  background: #d8d4ca;
  isolation: isolate;
}

.concept-visual::after {
  position: absolute;
  z-index: 2;
  inset: 0;
  border: 1px solid rgba(255, 255, 255, 0.28);
  content: "";
  pointer-events: none;
}

.concept-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 700ms cubic-bezier(0.2, 0.7, 0, 1);
}

.concept-card:hover .concept-visual img {
  transform: scale(1.035);
}

.concept-visual.is-missing img,
img.is-missing {
  visibility: hidden;
}

.concept-visual--kuon {
  background: linear-gradient(145deg, #ddd7c9, #8d9187);
}

.concept-visual--pico {
  background: linear-gradient(145deg, #f7d932 0 50%, #ef3d28 50%);
}

.concept-visual--mizube {
  background: radial-gradient(circle at 50% 20%, #27e5ef, #071328 50%, #02050d);
}

.concept-visual--noa {
  display: grid;
  place-items: center;
  background: #070812;
}

.mini-system {
  position: relative;
  width: 68%;
  aspect-ratio: 1;
  border: 1px solid rgba(151, 140, 255, 0.45);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(117, 96, 255, 0.55), transparent 36%);
  box-shadow: 0 0 70px rgba(108, 91, 255, 0.35);
}

.mini-system::before,
.mini-system::after {
  position: absolute;
  inset: 16%;
  border: 1px dashed #bdff62;
  border-radius: 50%;
  content: "";
}

.mini-system::after {
  inset: 38%;
  border: 0;
  background: #bdff62;
  box-shadow: 0 0 30px #bdff62;
}

.concept-visual--sui {
  background: linear-gradient(145deg, #ded4c5, #879275);
}

.concept-visual--neon {
  background: linear-gradient(145deg, #eaff00, #ff3bd4 55%, #5136ff);
}

.concept-meta {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: baseline;
  margin-bottom: 12px;
}

.concept-meta h3 {
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.8rem);
  letter-spacing: -0.055em;
  line-height: 1;
}

.concept-meta span {
  flex: none;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.concept-card > p {
  min-height: 4.8em;
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 0.86rem;
}

.concept-link {
  display: inline-flex;
  gap: 14px;
  align-items: center;
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.concept-link::after {
  content: "↗";
  font-size: 1.1rem;
  transition: transform 180ms ease;
}

.concept-link:hover::after {
  transform: translate(3px, -3px);
}

.research-note {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 8vw, 130px);
  padding-block: clamp(70px, 9vw, 120px);
  border-top: 1px solid var(--line);
}

.research-note h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 4rem);
  letter-spacing: -0.055em;
  line-height: 1;
}

.research-note p {
  margin: 0 0 18px;
  color: var(--muted);
}

.research-note a {
  font-weight: 800;
  text-underline-offset: 5px;
}

.gallery-footer {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  padding-block: 30px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.72rem;
}

@media (max-width: 850px) {
  .gallery-hero,
  .research-note {
    grid-template-columns: 1fr;
  }

  .gallery-intro {
    max-width: 580px;
  }

  .concept-card {
    grid-column: span 6;
  }

  .concept-card:nth-child(2) {
    margin-top: 0;
  }

  .concept-card:last-child {
    grid-column: 4 / span 6;
  }
}

@media (max-width: 600px) {
  .gallery-shell {
    width: min(100% - 28px, 1440px);
  }

  .gallery-header {
    min-height: 62px;
  }

  .gallery-nav {
    gap: 14px;
    font-size: 0.62rem;
  }

  .gallery-nav a:last-child {
    display: none;
  }

  .gallery-hero {
    gap: 48px;
    padding-block: 70px 76px;
  }

  .gallery-hero h1 {
    font-size: clamp(3.5rem, 21vw, 5.3rem);
  }

  .collection-heading {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .concept-grid {
    grid-template-columns: 1fr;
    row-gap: 58px;
    column-gap: 0;
  }

  .concept-card,
  .concept-card:last-child {
    grid-column: 1;
  }

  .concept-card > p {
    min-height: 0;
  }

  .gallery-footer {
    flex-direction: column;
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}