/* ==========================================================================
   ikuto32 portfolio
   配色やフォントを変えるときは :root の変数だけ触れば足ります。
   （点群やデモの色も、この変数を JS が読んで Wasm に渡しています）
   ========================================================================== */

:root {
  --bg: #F2F0EA;
  --fg: #111110;
  --muted: #62615C;
  --line: rgba(17, 17, 16, .2);
  --accent: #FF4A1C;      /* 塗り・大きな文字用 */
  --accent-ink: #C2330C;  /* 小さな文字用（背景とのコントラスト確保） */
  --on-accent: #111110;

  --font-jp: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "BIZ UDPGothic", "Yu Gothic UI", "Noto Sans JP", Meiryo, sans-serif;
  --font-display: "Archivo", "Helvetica Neue", Arial, var(--font-jp);
  --font-body: "Archivo", var(--font-jp);
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --gutter: clamp(1.125rem, 4vw, 3.5rem);
  --header-h: 3.5rem;
  --ease: cubic-bezier(.16, 1, .3, 1);
}

/* ---------- base ---------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: var(--header-h);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.9;
  line-break: strict;
  overflow-x: hidden;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--accent);
  color: var(--on-accent);
}

h1, h2, h3, h4, p, ul, ol, dl, dd, figure {
  margin: 0;
}

ul, ol {
  padding: 0;
  list-style: none;
}

a {
  color: inherit;
}

img, video {
  max-width: 100%;
}

button, input {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--fg);
  outline-offset: 4px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.sprite {
  position: absolute;
  width: 0;
  height: 0;
}

.icon {
  width: 1em;
  height: 1em;
  flex: none;
}

.label {
  font-family: var(--font-mono);
  font-size: .6875rem;
  font-weight: 400;
  line-height: 1.7;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
}

.dot {
  display: inline-block;
  width: .55em;
  height: .55em;
  margin-right: .7em;
  border-radius: 50%;
  background: var(--accent);
}

.skip {
  position: fixed;
  top: .5rem;
  left: .5rem;
  z-index: 60;
  padding: .5rem 1rem;
  background: var(--fg);
  color: var(--bg);
  font-size: .875rem;
  text-decoration: none;
  transform: translateY(-200%);
}

.skip:focus {
  transform: none;
}

.progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* ---------- intro / cursor（アニメーションが有効なときだけ出る） ---------- */

.intro {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: none;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--gutter);
  background: var(--fg);
  color: var(--bg);
}

.is-intro .intro {
  display: flex;
}

.intro__name {
  position: absolute;
  top: 1.1rem;
  left: var(--gutter);
  font-family: var(--font-display);
  font-stretch: 125%;
  font-weight: 800;
  letter-spacing: -.03em;
}

.intro__count {
  margin-left: -.04em;
  font-family: var(--font-display);
  font-stretch: 125%;
  font-weight: 800;
  font-size: clamp(5rem, 24vw, 22rem);
  line-height: .8;
  letter-spacing: -.055em;
  font-variant-numeric: tabular-nums;
}

.intro__bar {
  display: block;
  height: 2px;
  margin-top: clamp(1rem, 2.5vw, 2rem);
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: 0 50%;
}

.cursor {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 40;
  display: none;
  place-items: center;
  width: .7rem;
  height: .7rem;
  margin: -.35rem 0 0 -.35rem;
  border-radius: 50%;
  background: var(--accent);
  pointer-events: none;
  opacity: 0;
  transition: width .4s var(--ease), height .4s var(--ease), margin .4s var(--ease), opacity .3s;
}

.has-cursor .cursor {
  display: grid;
}

.cursor.is-on {
  opacity: 1;
}

.cursor.is-label {
  width: 4.5rem;
  height: 4.5rem;
  margin: -2.25rem 0 0 -2.25rem;
}

.cursor__label {
  font-family: var(--font-mono);
  font-size: .625rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--on-accent);
  opacity: 0;
  transition: opacity .2s;
}

.cursor.is-label .cursor__label {
  opacity: 1;
}

/* ---------- header ---------- */

.header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: var(--header-h);
  padding: 0 var(--gutter);
  background: rgba(242, 240, 234, .86);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.header__logo {
  font-family: var(--font-display);
  font-stretch: 125%;
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: -.03em;
  text-decoration: none;
}

.nav {
  display: flex;
  gap: clamp(.875rem, 2.5vw, 2rem);
}

.nav__link {
  position: relative;
  padding: .75rem 0;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
  transition: color .3s;
}

.nav__link::after {
  content: "";
  position: absolute;
  inset: auto 0 .5rem;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform .5s var(--ease);
}

.nav__link:hover,
.nav__link[aria-current="true"] {
  color: var(--fg);
}

.nav__link[aria-current="true"]::after {
  transform: scaleX(1);
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 100vh;
  min-height: 100svh;
  padding: calc(var(--header-h) + 2rem) var(--gutter) clamp(1.5rem, 4vw, 3rem);
  touch-action: pan-y;
}

/* 点群の描画先。p5.js がこの中に canvas を作る */
.hero__stage {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.hero__stage canvas {
  display: block;
}

.hero__hud {
  position: absolute;
  top: calc(var(--header-h) + .75rem);
  right: var(--gutter);
  z-index: 1;
  display: grid;
  gap: .1rem;
  text-align: right;
  pointer-events: none;
}

.hero__hud .dot {
  margin-right: .6em;
}

.hero__label,
.hero__title,
.hero__foot {
  position: relative;
  z-index: 1;
}

.hero__label {
  margin-bottom: clamp(.75rem, 2vw, 1.5rem);
}

.hero__title {
  margin-left: -.045em;
  font-family: var(--font-display);
  font-stretch: 125%;
  font-weight: 800;
  /* "ikuto32" の字幅は約 4.3em。左右の余白を除いた幅にちょうど収める */
  font-size: 21vw;
  font-size: calc((100vw - 2 * var(--gutter)) / 4.3);
  line-height: .82;
  letter-spacing: -.055em;
  white-space: nowrap;
  pointer-events: none;
}

.hero__letters {
  display: block;
}

.hero__line {
  display: inline-block;
  padding-block: .04em;
  overflow: hidden;
  overflow: clip;
  vertical-align: bottom;
}

.hero__line:last-child {
  color: var(--accent);
}

.hero__letter {
  display: inline-block;
}

/* 縦長の狭い画面では "ikuto" / "32" の2段にして、1段目の字幅（約 2.85em）で幅いっぱいに組む */
@media (max-width: 40rem) and (orientation: portrait) {
  .hero__title {
    font-size: calc((100vw - 2 * var(--gutter)) / 2.85);
  }

  .hero__line {
    display: block;
  }
}

.hero__foot {
  display: grid;
  gap: 1.5rem;
  margin-top: clamp(1.5rem, 4vw, 3.5rem);
  padding-top: clamp(1rem, 2vw, 1.5rem);
  border-top: 1px solid var(--line);
}

.hero__lead {
  font-family: var(--font-jp);
  font-size: clamp(1.125rem, 2.1vw, 1.75rem);
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: .02em;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: .25rem 1.5rem;
}

.hero__scroll {
  display: inline-flex;
  align-items: center;
  gap: .6em;
  justify-self: start;
  text-decoration: none;
  color: var(--fg);
}

.hero__scroll .icon {
  font-size: 1rem;
}

@media (min-width: 48rem) {
  .hero__foot {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) auto;
    align-items: end;
  }

  .hero__meta {
    flex-direction: column;
  }

  .hero__scroll {
    justify-self: end;
  }
}

@media (hover: hover) {
  .hero {
    cursor: grab;
  }

  .hero.is-dragging {
    cursor: grabbing;
    user-select: none;
  }
}

@media (hover: none) {
  .hero__hint {
    display: none;
  }
}

/* ---------- section ---------- */

.section {
  padding: clamp(5rem, 13vw, 12rem) var(--gutter) 0;
}

.section__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  column-gap: clamp(.75rem, 2vw, 1.5rem);
}

.section__num {
  padding-top: .5em;
  color: var(--accent-ink);
}

.section__title {
  margin-left: -.04em;
  padding-block: .05em;
  overflow: hidden;
  overflow: clip;
  font-family: var(--font-display);
  font-stretch: 125%;
  font-weight: 800;
  font-size: clamp(3.25rem, 13vw, 13rem);
  line-height: .86;
  letter-spacing: -.05em;
}

.mask__in {
  display: block;
}

.char {
  display: inline-block;
}

.section__note {
  grid-column: 2;
  margin-top: .75rem;
}

@media (min-width: 48rem) {
  .section__head {
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: end;
  }

  .section__num {
    align-self: start;
  }

  .section__note {
    grid-column: auto;
    margin: 0 0 .9em;
    text-align: right;
  }
}

.rule {
  height: 1px;
  margin-top: clamp(1rem, 2.5vw, 2rem);
  background: var(--fg);
  transform-origin: 0 50%;
}

/* ---------- about ---------- */

.about {
  display: grid;
  gap: clamp(2rem, 6vw, 6rem);
  padding-top: clamp(2rem, 5vw, 5rem);
}

.about__lead {
  font-family: var(--font-jp);
  font-size: clamp(1.5rem, 3.3vw, 3rem);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .01em;
  font-feature-settings: "palt";
  word-break: auto-phrase;
  text-wrap: balance;
}

.about__body {
  display: grid;
  gap: 1.5rem;
  max-width: 40rem;
}

.about__body p {
  text-align: justify;
}

.facts {
  margin-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.facts__row {
  display: grid;
  grid-template-columns: 7.5rem minmax(0, 1fr);
  gap: 1rem;
  padding: .85rem 0;
  border-bottom: 1px solid var(--line);
  font-size: .9375rem;
  line-height: 1.7;
}

.facts__row dt {
  padding-top: .3em;
}

@media (min-width: 60rem) {
  .about {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: start;
  }

  .about__lead {
    position: sticky;
    top: calc(var(--header-h) + 2rem);
  }

  .about__body {
    justify-self: end;
  }
}

/* ---------- works: projects ---------- */

.projects {
  display: grid;
  gap: clamp(5rem, 12vw, 11rem);
  padding-top: clamp(2.5rem, 6vw, 5rem);
}

.project {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: center;
}

.project__body {
  display: grid;
  gap: 1.1rem;
  justify-items: start;
  align-content: center;
}

.project__num {
  color: var(--accent-ink);
}

.project__name {
  font-family: var(--font-display);
  font-stretch: 100%;
  font-weight: 700;
  font-size: clamp(2rem, 4.6vw, 4.25rem);
  line-height: 1.02;
  letter-spacing: -.035em;
  overflow-wrap: anywhere;
  text-wrap: balance;
}

.project__name a {
  text-decoration: none;
  background: linear-gradient(var(--accent), var(--accent)) 0 100% / 0 .08em no-repeat;
  transition: background-size .6s var(--ease);
}

.project__name a:hover,
.project__name a:focus-visible {
  background-size: 100% .08em;
}

.project__desc {
  max-width: 34rem;
  font-size: .9375rem;
  line-height: 1.9;
}

.project__cta {
  display: inline-flex;
  align-items: center;
  gap: .6em;
  margin-top: .4rem;
  padding: .8rem 1.2rem;
  border: 1px solid var(--fg);
  border-radius: 999px;
  color: var(--fg);
  text-decoration: none;
  transition: background-color .3s, color .3s;
}

.project__cta:hover {
  background: var(--fg);
  color: var(--bg);
}

.project__cta .icon {
  font-size: .875rem;
}

@media (min-width: 60rem) {
  .project {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    column-gap: clamp(2.5rem, 6vw, 6rem);
  }

  .project--flip .project__media {
    order: 2;
  }

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

/* スクリーンショット（MyImageSearch） */

.shot {
  position: relative;
  padding: 0 7% 8% 0;
}

.shot__link {
  position: absolute;
  inset: 0;
  z-index: 3;
}

.shot__desktop {
  overflow: hidden;
  border: 1px solid var(--fg);
  border-radius: .6rem;
  background: #fff;
}

.shot__bar {
  display: flex;
  gap: .4rem;
  padding: .6rem .75rem;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}

.shot__bar i {
  width: .55rem;
  height: .55rem;
  border-radius: 50%;
  background: var(--line);
}

.shot__bar i:first-child {
  background: var(--accent);
}

.shot__view {
  aspect-ratio: 3 / 2;
  overflow: hidden;
}

.shot__view img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 0;
}

.shot__mobile {
  position: absolute;
  right: 0;
  bottom: 0;
  z-index: 2;
  width: 23%;
  overflow: hidden;
  border: 1px solid var(--fg);
  border-radius: clamp(.5rem, 1.2vw, 1rem);
  background: #fff;
  box-shadow: 0 1.5rem 3rem -1.25rem rgba(17, 17, 16, .5);
}

.shot__mobile img {
  display: block;
  width: 100%;
  height: auto;
}

/* インタラクティブデモ（Wasm + p5.js） */

.demo {
  display: grid;
  gap: 1rem;
  width: 100%;
  max-width: 38rem;
  justify-self: center;
}

.demo__canvas {
  position: relative;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border: 1px solid var(--fg);
  background: var(--bg);
  touch-action: pan-y;
}

.demo__canvas canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.demo__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .6rem 1.25rem;
}

.demo__group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem;
}

.chip {
  min-width: 2.25rem;
  padding: .45rem .7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: none;
  font-family: var(--font-mono);
  font-size: .6875rem;
  line-height: 1.2;
  letter-spacing: .04em;
  cursor: pointer;
  transition: background-color .25s, color .25s, border-color .25s;
}

.chip:hover {
  border-color: var(--fg);
}

.chip[aria-pressed="true"] {
  border-color: var(--fg);
  background: var(--fg);
  color: var(--bg);
}

.demo__field {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  margin-right: .35rem;
}

.demo__input {
  width: 3rem;
  height: 2.25rem;
  padding: 0;
  border: 1px solid var(--fg);
  border-radius: .35rem;
  background: #fff;
  font-family: var(--font-jp);
  font-size: 1.125rem;
  font-weight: 700;
  text-align: center;
}

.demo__read {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 2.5rem;
  padding: .75rem 0;
  border-block: 1px solid var(--line);
}

.demo__read dd {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
}

.demo__note,
.demo__fallback {
  font-size: .8125rem;
  line-height: 1.8;
  color: var(--muted);
}

/* JS が動いていて、読み込みにも失敗していないときは代替メッセージを隠す */
.js .demo:not(.is-failed) .demo__fallback {
  display: none;
}

/* 逆に、デモを出せないとき（JS なし・読み込み失敗）は空の枠と操作ボタンを片付ける */
html:not(.js) .demo__canvas,
html:not(.js) .demo__bar,
html:not(.js) .demo__read,
.demo.is-failed .demo__canvas,
.demo.is-failed .demo__bar,
.demo.is-failed .demo__read {
  display: none;
}

.demo__fallback {
  padding: 1rem 1.25rem;
  border: 1px solid var(--line);
}

/* 映像の列（MV_test） */

.films {
  margin: clamp(.5rem, 2vw, 1.5rem) calc(var(--gutter) * -1) 0;
  padding: 0 var(--gutter) 1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--fg) transparent;
}

.films__track {
  display: flex;
  gap: clamp(1rem, 2.5vw, 2rem);
  width: max-content;
}

.film {
  flex: none;
  width: min(82vw, 58rem);
  scroll-snap-align: center;
}

.film__media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--fg);
  background: var(--fg);
}

.film__video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.film__meta {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: .15rem 1.25rem;
  padding-top: 1rem;
}

.film__num {
  grid-row: span 3;
  color: var(--accent-ink);
}

.film__title {
  font-family: var(--font-jp);
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: .02em;
}

.film__theme {
  font-size: .9375rem;
  line-height: 1.8;
}

/* PC のリッチ表示では、縦スクロールに合わせて JS が横へ送る */
.films.is-pinned {
  padding-bottom: 0;
  overflow: visible;
  scroll-snap-type: none;
}

/* ---------- works: forks ---------- */

.works {
  padding-top: clamp(1rem, 2.5vw, 2rem);
}

.work {
  border-bottom: 1px solid var(--line);
}

.work__link {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr) 1.5rem;
  gap: .75rem 0;
  padding: clamp(1.25rem, 2.6vw, 2.25rem) 0;
  text-decoration: none;
  transition: color .35s;
}

/* ホバー時に下からせり上がる塗り。左右は画面端まで伸ばす */
.work__link::before {
  content: "";
  position: absolute;
  inset: 0 calc(var(--gutter) * -1);
  z-index: -1;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: 50% 100%;
  transition: transform .55s var(--ease);
}

.work__num {
  padding-top: .55em;
  transition: color .35s;
}

.work__name {
  font-family: var(--font-display);
  font-stretch: 100%;
  font-weight: 700;
  font-size: clamp(1.375rem, 3vw, 2.5rem);
  line-height: 1.02;
  letter-spacing: -.025em;
  overflow-wrap: anywhere;
  text-wrap: balance;
  transition: transform .55s var(--ease);
}

.work__detail {
  grid-column: 2 / -1;
  display: grid;
  gap: .75rem;
}

.work__desc {
  font-size: .9375rem;
  line-height: 1.85;
}

.work__tags {
  transition: color .35s;
}

.work__arrow {
  grid-column: 3;
  grid-row: 1;
  align-self: start;
  justify-self: end;
  margin-top: .25em;
  font-size: 1.25rem;
  transition: transform .55s var(--ease);
}

.subhead {
  display: flex;
  align-items: center;
  margin-top: clamp(5rem, 11vw, 9rem);
  padding-bottom: .9rem;
  border-bottom: 1px solid var(--fg);
  color: var(--fg);
}

@media (min-width: 60rem) {
  .work__link {
    grid-template-columns: 4rem minmax(0, 1.15fr) minmax(0, 1fr) 3.5rem;
    align-items: start;
    column-gap: 0;
  }

  .work__name {
    padding-right: 2rem;
  }

  .work__detail {
    grid-column: 3;
    padding-top: .25rem;
  }

  .work__arrow {
    grid-column: 4;
    font-size: 1.75rem;
  }
}

@media (hover: hover) {
  .work__link:hover {
    color: var(--on-accent);
  }

  .work__link:hover::before {
    transform: scaleY(1);
  }

  .work__link:hover .label {
    color: var(--on-accent);
  }

  .work__link:hover .work__name {
    transform: translateX(.2em);
  }

  .work__link:hover .work__arrow {
    transform: translate(.2em, -.2em);
  }
}

/* ---------- skills ---------- */

.marquee {
  display: grid;
  margin: clamp(1.5rem, 4vw, 3.5rem) calc(var(--gutter) * -1) 0;
  padding: .28em 0 .2em;
  overflow: hidden;
  border-block: 1px solid var(--line);
  font-family: var(--font-display);
  font-stretch: 112%;
  font-weight: 800;
  font-size: clamp(2.5rem, 8.5vw, 7.5rem);
  line-height: 1.02;
  letter-spacing: -.04em;
  white-space: nowrap;
}

.marquee__track {
  display: inline-flex;
  width: max-content;
  padding-left: var(--gutter);
}

.marquee__track span {
  display: inline-flex;
  align-items: center;
}

.marquee__track span::after {
  content: "";
  width: .22em;
  height: .22em;
  margin: 0 .38em;
  border-radius: 50%;
  background: var(--accent);
}

.marquee__track span:nth-child(even) {
  color: transparent;
  -webkit-text-stroke: 1px var(--fg);
}

.marquee__track.is-looped {
  padding-left: 0;
  will-change: transform;
}

.skills {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10.5rem, 1fr));
  gap: clamp(2rem, 4vw, 3.5rem) clamp(1.25rem, 3vw, 2.5rem);
  padding-top: clamp(2.5rem, 6vw, 5rem);
}

.skills__group h3 {
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--fg);
  color: var(--accent-ink);
}

.skills__group li {
  padding: .6rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 1.0625rem;
  font-weight: 500;
  line-height: 1.5;
}

/* ---------- links ---------- */

.links {
  padding-top: clamp(.5rem, 1.5vw, 1rem);
}

.link {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  column-gap: 1rem;
  padding: clamp(.75rem, 1.6vw, 1.5rem) 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.link__name {
  font-family: var(--font-display);
  font-stretch: 125%;
  font-weight: 800;
  font-size: clamp(3rem, 13.5vw, 13rem);
  line-height: .9;
  letter-spacing: -.055em;
  margin-left: -.04em;
  transition: color .35s, transform .55s var(--ease);
}

.link__handle {
  grid-column: 1;
  grid-row: 2;
  margin-top: .5rem;
  text-transform: none;
}

.link__arrow {
  grid-column: 2;
  grid-row: 1;
  font-size: clamp(1.75rem, 6vw, 5rem);
  transition: color .35s, transform .55s var(--ease);
}

@media (min-width: 48rem) {
  .link {
    grid-template-columns: minmax(0, 1fr) auto auto;
    align-items: end;
    column-gap: clamp(1rem, 3vw, 3rem);
  }

  .link__handle {
    grid-column: 2;
    grid-row: 1;
    margin: 0 0 1.2em;
  }

  .link__arrow {
    grid-column: 3;
    align-self: center;
  }
}

@media (hover: hover) {
  .link:hover .link__name {
    color: var(--accent);
    transform: translateX(.06em);
  }

  .link:hover .link__arrow {
    color: var(--accent);
    transform: rotate(45deg);
  }
}

/* ---------- footer ---------- */

.footer {
  margin-top: clamp(5rem, 12vw, 10rem);
  overflow: hidden;
  border-top: 1px solid var(--fg);
}

.footer__mark {
  margin: clamp(1.5rem, 4vw, 3.5rem) var(--gutter) 0 calc(var(--gutter) - .045em);
  font-family: var(--font-display);
  font-stretch: 125%;
  font-weight: 800;
  font-size: 21vw;
  font-size: calc((100vw - 2 * var(--gutter)) / 4.3);
  line-height: .82;
  letter-spacing: -.055em;
  white-space: nowrap;
  color: transparent;
  -webkit-text-stroke: 1px var(--fg);
}

.footer__row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: .5rem 2rem;
  padding: clamp(1.5rem, 4vw, 3rem) var(--gutter) 2rem;
}

.footer__top {
  color: var(--fg);
  text-underline-offset: .3em;
}

/* ---------- 404 ---------- */

.notfound {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 100vh;
  min-height: 100svh;
  padding: calc(var(--header-h) + 2rem) var(--gutter) clamp(1.5rem, 4vw, 3rem);
}

.notfound__title {
  margin-left: -.045em;
  font-family: var(--font-display);
  font-stretch: 125%;
  font-weight: 800;
  font-size: clamp(6rem, 38vw, 40rem);
  line-height: .8;
  letter-spacing: -.06em;
}

.notfound__title span {
  color: var(--accent);
}

.notfound__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: 1rem 2rem;
  margin-top: clamp(1.5rem, 4vw, 3.5rem);
  padding-top: clamp(1rem, 2vw, 1.5rem);
  border-top: 1px solid var(--line);
}

.notfound__lead {
  font-family: var(--font-jp);
  font-size: clamp(1.125rem, 2.1vw, 1.75rem);
  font-weight: 700;
}

.notfound__back {
  font-weight: 700;
  text-underline-offset: .3em;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
}

/* ==========================================================================
   Motion
   3つのモードがある。
     1. JS なし            … 最初から全部見える
     2. html.js            … 基本表示。CSS のトランジションでせり上がる
     3. html.js.is-rich    … GSAP が読み込めたとき。動きは rich.js が担当するので、
                             下の基本表示用のルールは :not(.is-rich) で外れる
   ========================================================================== */

/* Lenis（慣性スクロール）が要求するスタイル */
html.lenis,
html.lenis body {
  height: auto;
}

html.lenis {
  scroll-behavior: auto !important;
}

.lenis.lenis-stopped {
  overflow: hidden;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }

  /* せり上がり（既定） */
  .js:not(.is-rich) [data-reveal] {
    opacity: 0;
    transform: translate3d(0, 2rem, 0);
    transition: opacity .9s var(--ease) var(--d, 0s), transform 1.1s var(--ease) var(--d, 0s);
  }

  .js:not(.is-rich) [data-reveal].is-in {
    opacity: 1;
    transform: none;
  }

  /* 見出し：マスクの下から文字が上がる */
  .js:not(.is-rich) [data-reveal="mask"] {
    opacity: 1;
    transform: none;
  }

  .js:not(.is-rich) [data-reveal="mask"] .mask__in {
    transform: translate3d(0, 108%, 0);
    transition: transform 1.2s var(--ease);
  }

  .js:not(.is-rich) [data-reveal="mask"].is-in .mask__in {
    transform: none;
  }

  /* 罫線：左から伸びる */
  .js:not(.is-rich) [data-reveal="rule"] {
    opacity: 1;
    transform: scaleX(0);
    transition: transform 1.4s var(--ease);
  }

  .js:not(.is-rich) [data-reveal="rule"].is-in {
    transform: scaleX(1);
  }

  /* Hero：1文字ずつ立ち上がる */
  .js:not(.is-rich) .hero__letter {
    transform: translate3d(0, 108%, 0);
    transition: transform 1.2s var(--ease);
  }

  .js:not(.is-rich) .hero__letter:nth-child(2) { transition-delay: .06s; }
  .js:not(.is-rich) .hero__letter:nth-child(3) { transition-delay: .12s; }
  .js:not(.is-rich) .hero__letter:nth-child(4) { transition-delay: .18s; }
  .js:not(.is-rich) .hero__letter:nth-child(5) { transition-delay: .24s; }
  .js:not(.is-rich) .hero__line:last-child .hero__letter:nth-child(1) { transition-delay: .30s; }
  .js:not(.is-rich) .hero__line:last-child .hero__letter:nth-child(2) { transition-delay: .36s; }

  .js:not(.is-rich) .hero__label,
  .js:not(.is-rich) .hero__foot,
  .js:not(.is-rich) .hero__hud {
    opacity: 0;
    transform: translate3d(0, 1rem, 0);
    transition: opacity .9s var(--ease) .55s, transform .9s var(--ease) .55s;
  }

  .js.is-loaded:not(.is-rich) .hero__letter,
  .js.is-loaded:not(.is-rich) .hero__label,
  .js.is-loaded:not(.is-rich) .hero__foot,
  .js.is-loaded:not(.is-rich) .hero__hud {
    opacity: 1;
    transform: none;
  }

  /* 基本表示の帯は CSS だけで流す */
  .js:not(.is-rich) .marquee__track.is-looped {
    animation: marquee 48s linear infinite;
  }

  .js:not(.is-rich) .marquee__track--reverse.is-looped {
    animation-direction: reverse;
  }

  /* スクロール連動（対応ブラウザのみ）：進捗バーと Hero のパララックス */
  @supports (animation-timeline: scroll()) {
    .js:not(.is-rich) .progress,
    html:not(.js) .progress {
      animation: progress linear both;
      animation-timeline: scroll(root);
    }

    .js:not(.is-rich) .hero__title {
      animation: hero-out linear both;
      animation-timeline: scroll(root);
      animation-range: 0 100vh;
    }
  }
}

@keyframes marquee {
  to {
    transform: translate3d(-50%, 0, 0);
  }
}

@keyframes progress {
  to {
    transform: scaleX(1);
  }
}

@keyframes hero-out {
  to {
    transform: translate3d(0, 18%, 0);
    opacity: .25;
  }
}

/* 動きを減らす設定のとき：移動・帯・パララックス・オープニングをやめ、短いフェードだけ残す。
   点群とデモは静止画になり、操作したときだけ描き直す。動画は自動再生しない */
@media (prefers-reduced-motion: reduce) {
  .js [data-reveal] {
    opacity: 0;
    transition: opacity .4s linear;
  }

  .js [data-reveal].is-in {
    opacity: 1;
  }

  .intro,
  .cursor {
    display: none !important;
  }

  .work__link::before,
  .work__name,
  .work__arrow,
  .link__name,
  .link__arrow,
  .nav__link::after,
  .project__name a {
    transition: none;
  }
}

@media print {
  .header,
  .progress,
  .intro,
  .cursor,
  .marquee,
  .hero__stage,
  .hero__hud,
  .hero__scroll {
    display: none !important;
  }

  .hero {
    min-height: 0;
  }
}