/* Portfolio pages (index.html, work/*.html).
   Tokens follow takaoumehara.com (src/styles/tokens.css): monochrome, one blue,
   fill-separated cards, 8px radius, Outfit + Geist Mono, bilingual EN/JP. */
:root {
  --ink: #000;
  --ink-2: #666;
  --canvas: #fff;
  --card: #f4f4f4;
  --card-2: #e9e9e9;
  --line: #e2e2e2;
  --blue: #0062cc;
  --ff: "Outfit", -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", "Inter", "Helvetica Neue", Arial, sans-serif;
  --ff-mono: "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --text-xs: clamp(12px, 0.26vw + 8.65px, 15px);
  --text-sm: clamp(13px, 0.28vw + 9.4px, 16.5px);
  --text-body: clamp(15px, 0.31vw + 11px, 19px);
  --text-lg: clamp(18px, 0.39vw + 13px, 23px);
  --text-xl: clamp(24px, 1.4vw + 14px, 40px);
  --text-hero: clamp(34px, 3.6vw + 16px, 76px);
  --gap: clamp(8px, 0.45vw + 2.2px, 12px);
  --pad: clamp(20px, 3vw, 32px);
  --gutter: clamp(16px, 2.2vw, 40px);
  --r: 8px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --max: 1440px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #fff; --ink-2: #a3a3a3; --canvas: #000; --card: #161616; --card-2: #232323;
    --line: #262626; --blue: #3b9cff; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --ink: #fff; --ink-2: #a3a3a3; --canvas: #000; --card: #161616; --card-2: #232323;
  --line: #262626; --blue: #3b9cff; color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--canvas); color: var(--ink);
  font-family: var(--ff); font-size: var(--text-body); line-height: 1.45;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
img, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
h1, h2, h3 { font-weight: 600; margin: 0; letter-spacing: 0.005em; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 4px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Bilingual: EN by default, html.lang-jp swaps */
.t-jp { display: none; }
html.lang-jp .t-en { display: none; }
html.lang-jp .t-jp { display: inline; }
html.lang-jp .t-jp.is-block { display: block; }
html.lang-jp body { font-feature-settings: "palt"; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.mono { font-family: var(--ff-mono); font-weight: 300; letter-spacing: 0.02em; font-size: var(--text-xs); text-transform: uppercase; }
.muted { color: var(--ink-2); }

/* ── Top bar ─────────────────────────────────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--canvas) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(12px); -webkit-backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--line);
}
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; height: 56px; }
.brand { text-decoration: none; font-weight: 600; font-size: var(--text-sm); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.brand .muted { font-weight: 400; }
.topbar nav { display: flex; align-items: center; gap: 4px; flex-shrink: 0; }
.topbar nav a { text-decoration: none; font-size: var(--text-sm); padding: 6px 10px; border-radius: var(--r); }
.topbar nav a:hover { background: var(--card); }
.lang-toggle {
  font: inherit; font-size: var(--text-xs); font-family: var(--ff-mono); cursor: pointer;
  border: 1px solid var(--line); background: transparent; color: var(--ink);
  border-radius: 999px; padding: 5px 10px; min-width: 44px; min-height: 32px;
}
.lang-toggle:hover { background: var(--card); }
@media (max-width: 560px) { .topbar nav .hide-sm { display: none; } }

/* ── Buttons ─────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px; min-height: 44px;
  padding: 10px 18px; border-radius: 999px; text-decoration: none; font-size: var(--text-sm);
  border: 1px solid var(--ink); transition: background .2s var(--ease), color .2s var(--ease);
}
.btn-primary { background: var(--ink); color: var(--canvas); }
.btn-primary:hover { background: var(--blue); border-color: var(--blue); }
.btn-ghost:hover { background: var(--ink); color: var(--canvas); }
.btn .arrow { transition: transform .25s var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

/* ── Hub ─────────────────────────────────────────────────────────────── */
.hub-intro { padding: clamp(48px, 9vw, 128px) 0 clamp(32px, 5vw, 64px); }
.hub-intro h1 { font-size: var(--text-hero); line-height: 1.04; max-width: 16ch; }
.hub-intro .lead { font-size: var(--text-lg); color: var(--ink-2); max-width: 46ch; margin-top: 20px; line-height: 1.4; }
.hub-intro .meta { display: flex; flex-wrap: wrap; gap: 8px 24px; margin-top: 28px; }

.tier { padding-bottom: clamp(40px, 6vw, 80px); }
.tier-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; border-top: 1px solid var(--line); padding: 16px 0 20px; }
.tier-head h2 { font-size: var(--text-sm); font-weight: 500; }

.grid { display: grid; gap: var(--gap); }
.grid-3 { grid-template-columns: 1.45fr 1fr 1fr; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 1000px) { .grid-3 { grid-template-columns: 1fr 1fr; } .grid-3 > :first-child { grid-column: 1 / -1; } }
@media (max-width: 640px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }

.card {
  position: relative; display: flex; flex-direction: column; background: var(--card);
  border-radius: var(--r); overflow: hidden; text-decoration: none; color: inherit;
  transition: background .25s var(--ease);
}
.card:hover { background: var(--card-2); }
.card-media { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: var(--card-2); }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease); }
.card:hover .card-media img { transform: scale(1.035); }
.card-media .pair { display: grid; grid-template-columns: 1fr 1fr; height: 100%; gap: 2px; }
.card-body { display: flex; flex-direction: column; gap: 10px; padding: var(--pad); flex: 1; }
.card-body h3 { font-size: var(--text-lg); line-height: 1.2; }
.card-body p { color: var(--ink-2); font-size: var(--text-sm); }
.card-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: auto; padding-top: 8px; }
.roles { display: flex; flex-wrap: wrap; gap: 6px; }
.role { font-family: var(--ff-mono); font-weight: 300; font-size: var(--text-xs); letter-spacing: 0.02em; border: 1px solid var(--line); border-radius: 999px; padding: 3px 9px; }
.card:hover .role { border-color: var(--ink-2); }
.card-cta { font-size: var(--text-sm); white-space: nowrap; }
.card-cta .arrow { display: inline-block; transition: transform .25s var(--ease); }
.card:hover .card-cta .arrow { transform: translateX(3px); }
.badge { position: absolute; top: 12px; left: 12px; background: var(--canvas); color: var(--ink); border-radius: 999px; padding: 4px 10px; }
.card.is-feature .card-body h3 { font-size: var(--text-xl); }

/* Compact cards for the lower tiers: image beside text, so they read as secondary */
.card.is-compact { flex-direction: row; }
.card.is-compact .card-media { flex: 0 0 42%; aspect-ratio: auto; min-height: 100%; }
.card.is-compact .card-media img { position: absolute; inset: 0; }
.card.is-compact .card-body { padding: 18px 20px; gap: 8px; }
.card.is-compact .card-body h3 { font-size: var(--text-body); }
.card.is-compact .card-body p { font-size: var(--text-xs); }
@media (max-width: 480px) {
  .card.is-compact { flex-direction: column; }
  .card.is-compact .card-media { aspect-ratio: 16 / 9; flex: none; min-height: 0; }
}

.site-foot { border-top: 1px solid var(--line); padding: 32px 0 48px; font-size: var(--text-sm); color: var(--ink-2); }
.site-foot .wrap { display: flex; flex-wrap: wrap; gap: 12px 32px; justify-content: space-between; }
.site-foot a { color: var(--ink); }

/* ── Case study ──────────────────────────────────────────────────────── */
.cs-hero { position: relative; background: #0d0d0d; color: #fff; overflow: hidden; }
.cs-hero-media { position: relative; aspect-ratio: 1374 / 704; max-height: 78vh; width: 100%; overflow: hidden; }
.cs-hero-media img { width: 100%; height: 100%; object-fit: cover; }
.cs-hero-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 45%, rgba(0,0,0,.72)); }
.cs-hero-text { position: absolute; left: 0; right: 0; bottom: 0; padding-bottom: clamp(20px, 4vw, 48px); }
.cs-hero h1 { font-size: var(--text-hero); line-height: 1; }
.cs-hero .oneliner { font-size: var(--text-lg); margin-top: 12px; max-width: 34ch; opacity: .92; }
@media (max-width: 720px) {
  .cs-hero-text { position: static; background: #0d0d0d; padding-top: 20px; }
  .cs-hero-media::after { display: none; }
}

.cs-meta { display: grid; grid-template-columns: repeat(4, 1fr) auto; gap: var(--gap); padding: var(--gap) 0; }
.cs-meta .cell { background: var(--card); border-radius: var(--r); padding: 16px 20px; display: flex; flex-direction: column; gap: 6px; }
.cs-meta .cell b { font-weight: 500; font-size: var(--text-sm); }
.cs-meta .actions { display: flex; gap: 8px; align-items: center; padding: 0 0 0 8px; }
@media (max-width: 1000px) { .cs-meta { grid-template-columns: 1fr 1fr; } .cs-meta .actions { grid-column: 1 / -1; padding: 8px 0 0; flex-wrap: wrap; } }

.section { padding: clamp(56px, 8vw, 120px) 0 0; }
.section-head { display: grid; grid-template-columns: minmax(160px, 1fr) 3fr; gap: 16px var(--gap); margin-bottom: clamp(24px, 3vw, 40px); }
.section-head .kicker { padding-top: 0.55em; }
.section-head h2 { font-size: var(--text-xl); line-height: 1.12; max-width: 22ch; }
.section-head p { color: var(--ink-2); max-width: 58ch; margin-top: 14px; }
@media (max-width: 720px) { .section-head { grid-template-columns: 1fr; } .section-head .kicker { padding-top: 0; } }

.idea { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap); }
.idea .panel { background: var(--card); border-radius: var(--r); padding: var(--pad); display: flex; flex-direction: column; gap: 12px; }
.idea .panel h3 { font-size: var(--text-lg); }
.idea .panel p { color: var(--ink-2); }
.idea .panel.accent { background: #59A7E1; color: #fff; }
.idea .panel.accent p { color: rgba(255,255,255,.92); }
@media (max-width: 720px) { .idea { grid-template-columns: 1fr; } }

/* Perception stage: one moment, five brains */
.stage-wrap { background: #0d0d0d; border-radius: var(--r); overflow: hidden; color: #fff; }
.stage {
  position: relative; aspect-ratio: 5 / 3; overflow: hidden; background: #1a1a1a;
  --brain: #EB1800; touch-action: pan-y;
}
.stage .flat { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.stage .scene {
  position: absolute; left: 0; top: 0; width: 1500px; height: 900px;
  transform-origin: 0 0; transform: scale(var(--s, .5));
}
.stage .scene .layer {
  position: absolute; inset: -30px; background-position: center; background-repeat: no-repeat;
  will-change: transform; transition: opacity .4s var(--ease);
}
.stage.is-loading .scene { opacity: 0; }
.stage .scene { transition: opacity .45s var(--ease); }
.hint-touch { display: none; }
@media (hover: none) { .hint-hover { display: none; } .hint-touch { display: inline; } }
.stage-hint { position: absolute; right: 12px; bottom: 12px; background: rgba(0,0,0,.55); color: #fff; border-radius: 999px; padding: 6px 12px; pointer-events: none; }
.stage-bar { display: grid; grid-template-columns: 1fr auto; gap: 16px 24px; align-items: center; padding: 16px clamp(16px, 2vw, 24px) 20px; border-top: 4px solid var(--brain, #EB1800); transition: border-color .4s var(--ease); }
.stage-caption h3 { font-size: var(--text-lg); }
.stage-caption p { color: rgba(255,255,255,.72); font-size: var(--text-sm); margin-top: 4px; max-width: 60ch; }
.brain-tabs { display: flex; flex-wrap: wrap; gap: 6px; }
.brain-tab {
  display: inline-flex; align-items: center; gap: 8px; min-height: 40px; cursor: pointer;
  font: inherit; font-size: var(--text-sm); color: #fff; background: rgba(255,255,255,.08);
  border: 1px solid transparent; border-radius: 999px; padding: 6px 14px 6px 8px;
  transition: background .2s var(--ease), border-color .2s var(--ease);
}
.brain-tab img { width: 26px; height: 26px; }
.brain-tab .dot { width: 26px; height: 26px; border-radius: 50%; background: #fff; display: grid; place-items: center; color: #000; font-size: 13px; }
.brain-tab:hover { background: rgba(255,255,255,.16); }
.brain-tab[aria-selected="true"] { background: var(--c); border-color: var(--c); }
.brain-tab[aria-selected="true"].is-light { color: #000; }
@media (max-width: 900px) { .stage-bar { grid-template-columns: 1fr; } }

/* Journey */
.journey { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: var(--gap); }
.step { background: var(--card); border-radius: var(--r); overflow: hidden; display: flex; flex-direction: column; }
.step .shot { aspect-ratio: 16 / 9; overflow: hidden; background: var(--card-2); cursor: zoom-in; border: 0; padding: 0; display: block; width: 100%; }
.step .shot img { width: 100%; height: 100%; object-fit: cover; }
.step .txt { padding: 12px 14px 16px; display: flex; flex-direction: column; gap: 4px; }
.step .num { color: var(--ink-2); }
.step h3 { font-size: var(--text-sm); font-weight: 600; }
.step p { font-size: var(--text-xs); color: var(--ink-2); line-height: 1.4; }
@media (max-width: 1200px) { .journey { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
@media (max-width: 720px) {
  .journey { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; margin: 0 calc(var(--gutter) * -1); padding: 0 var(--gutter) 8px; }
  .journey .step { flex: 0 0 72%; scroll-snap-align: start; }
}

/* Design moments */
.moment { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2fr); gap: var(--gap); margin-bottom: var(--gap); }
.moment .note { background: var(--card); border-radius: var(--r); padding: var(--pad); display: flex; flex-direction: column; gap: 12px; }
.moment .note h3 { font-size: var(--text-lg); }
.moment .note p { color: var(--ink-2); font-size: var(--text-sm); }
.moment .note ul { margin: 4px 0 0; padding-left: 1.1em; color: var(--ink-2); font-size: var(--text-sm); display: grid; gap: 6px; }
.moment .media { background: var(--card); border-radius: var(--r); overflow: hidden; }
@media (max-width: 900px) { .moment { grid-template-columns: 1fr; } }

.clips { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; background: var(--line); align-content: start; }
.clip-label { display: flex; flex-direction: column; justify-content: flex-end; gap: 4px; padding: 14px; background: var(--card-2); font-size: var(--text-sm); }
.moment .media.is-dark { background: #2b2b2b; display: flex; align-items: center; }
.clip { position: relative; background: #eee; margin: 0; }
.clip video { width: 100%; aspect-ratio: 1280 / 752; object-fit: cover; }
.clip figcaption { position: absolute; left: 6px; bottom: 6px; color: #fff; background: var(--c); border-radius: 999px; padding: 2px 8px; font-size: var(--text-xs); }
.clip figcaption.is-light { color: #000; }
@media (max-width: 720px) { .clips { grid-template-columns: repeat(2, 1fr); } }

.zoomable { cursor: zoom-in; border: 0; padding: 0; background: none; display: block; width: 100%; }
.zoomable img { width: 100%; height: auto; }

.photos { display: grid; grid-template-columns: 1.2fr 1fr; grid-template-rows: auto auto; gap: var(--gap); }
.photos figure { margin: 0; border-radius: var(--r); overflow: hidden; background: var(--card); position: relative; }
.photos figure:first-child { grid-row: span 2; }
.photos img { width: 100%; height: 100%; object-fit: cover; }
.photos figcaption { position: absolute; left: 10px; bottom: 10px; background: var(--canvas); color: var(--ink); border-radius: 999px; padding: 4px 10px; font-size: var(--text-xs); }
@media (max-width: 720px) { .photos { grid-template-columns: 1fr; } .photos figure:first-child { grid-row: auto; } }

.teacher { display: grid; grid-template-columns: 2fr 1fr; gap: var(--gap); }
.teacher .media { border-radius: var(--r); overflow: hidden; background: var(--card); }
.teacher .note { background: var(--card); border-radius: var(--r); padding: var(--pad); display: flex; flex-direction: column; gap: 14px; }
.teacher blockquote { margin: 0; font-size: var(--text-lg); line-height: 1.35; }
.teacher .note p { color: var(--ink-2); font-size: var(--text-sm); }
@media (max-width: 900px) { .teacher { grid-template-columns: 1fr; } }

.facts { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap); margin-top: var(--gap); }
.fact { background: var(--card); border-radius: var(--r); padding: 20px; }
.fact b { display: block; font-size: var(--text-xl); font-weight: 600; line-height: 1.1; }
.fact span { color: var(--ink-2); font-size: var(--text-sm); }
@media (max-width: 720px) { .facts { grid-template-columns: 1fr 1fr; } }

/* Every screen gallery */
.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: var(--gap); }
.gallery button { border: 0; padding: 0; background: var(--card); border-radius: var(--r); overflow: hidden; cursor: zoom-in; aspect-ratio: 16 / 10; position: relative; }
.gallery button img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.gallery button:hover img { transform: scale(1.04); }
.gallery button span { position: absolute; left: 8px; bottom: 8px; background: var(--canvas); color: var(--ink); border-radius: 999px; padding: 2px 8px; font-size: var(--text-xs); opacity: 0; transition: opacity .2s; }
.gallery button:hover span, .gallery button:focus-visible span { opacity: 1; }
@media (max-width: 480px) { .gallery { grid-template-columns: 1fr 1fr; } }

.next { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap); margin: clamp(56px, 8vw, 120px) 0 var(--gap); }
.next a { background: var(--card); border-radius: var(--r); padding: var(--pad); text-decoration: none; display: flex; flex-direction: column; gap: 8px; min-height: 140px; justify-content: space-between; transition: background .2s var(--ease); }
.next a:hover { background: var(--card-2); }
.next a h3 { font-size: var(--text-xl); }
@media (max-width: 640px) { .next { grid-template-columns: 1fr; } }
.credits { font-size: var(--text-sm); color: var(--ink-2); max-width: 70ch; }

/* Lightbox */
.lb { position: fixed; inset: 0; z-index: 100; background: rgba(0,0,0,.92); display: none; flex-direction: column; color: #fff; }
.lb.is-open { display: flex; }
.lb-top { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; gap: 12px; }
.lb-count { opacity: .7; }
.lb-fig { flex: 1; display: flex; align-items: center; justify-content: center; margin: 0; padding: 0 56px; min-height: 0; flex-direction: column; gap: 12px; }
.lb-fig img { max-width: 100%; max-height: calc(100vh - 150px); object-fit: contain; border-radius: 4px; }
.lb-cap { font-size: var(--text-sm); opacity: .85; text-align: center; max-width: 70ch; padding: 0 16px; }
.lb button { font: inherit; color: #fff; background: rgba(255,255,255,.1); border: 0; border-radius: 999px; width: 44px; height: 44px; cursor: pointer; font-size: 20px; display: grid; place-items: center; }
.lb button:hover { background: rgba(255,255,255,.22); }
.lb-prev, .lb-next { position: absolute; top: 50%; transform: translateY(-50%); }
.lb-prev { left: 8px; } .lb-next { right: 8px; }
@media (max-width: 640px) { .lb-fig { padding: 0 8px; } .lb-prev, .lb-next { top: auto; bottom: 16px; transform: none; } .lb-prev { left: calc(50% - 52px); } .lb-next { right: calc(50% - 52px); } .lb-fig img { max-height: calc(100vh - 190px); } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}