/* 余白設計室 YOHAKU ARCHITECTS — SAMPLE 02 · SIGNATURE (Novaia Labs, self-initiated, fictional office).
   Art direction: concrete grey ground, ink lines, one signal red; IBM Plex Sans JP + Plex Mono labels; a visible 12-column hairline grid; drawings are first-class content.
   The one distinctive motion: the section is drawn, then each room opens onto the same building's picture (CG render from the same model). */
:root { --bg: #e4e1da; --paper: #efede7; --ink: #1b1b1a; --ink-2: #55534e; --red: #c8442f; --red-t: #a3301c; --line: rgba(27, 27, 26, .26); --line-2: rgba(27, 27, 26, .12);
  --sans: "IBM Plex Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif; --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace; --gut: clamp(18px, 3.4vw, 52px); --p: 0; }
* { box-sizing: border-box; margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { background: var(--bg); color: var(--ink); font: 400 16px/1.9 var(--sans); letter-spacing: .04em; -webkit-font-smoothing: antialiased; }
body::before { content: ""; position: fixed; z-index: 0; inset: 0 var(--gut); pointer-events: none; background: repeating-linear-gradient(to right, var(--line-2) 0 1px, transparent 1px calc((100% - 1px) / 12)); opacity: .55; }
body::after { content: ""; position: fixed; z-index: 0; top: 0; bottom: 0; right: var(--gut); width: 1px; background: var(--line-2); opacity: .55; }
a { color: inherit; text-decoration: none; } a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible { outline: 2px solid var(--red); outline-offset: 4px; }
main, .foot, .top { position: relative; z-index: 1; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip { position: absolute; left: 12px; top: -60px; z-index: 60; padding: 10px 16px; background: var(--ink); color: var(--bg); } .skip:focus { top: 12px; }
em { font-style: normal; }

.top { position: fixed; z-index: 40; inset: 0 0 auto 0; display: flex; justify-content: space-between; align-items: center; padding: clamp(14px, 1.8vw, 24px) var(--gut); transition: background .4s, border-color .4s; border-bottom: 1px solid transparent; }
.top.bar { background: rgba(228, 225, 218, .92); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border-color: var(--line); }
.logo { display: inline-flex; align-items: baseline; gap: 10px; }
.logo b { font: 600 15px/1 var(--mono); letter-spacing: .22em; } .logo span { font: 500 12px/1 var(--mono); letter-spacing: .2em; color: var(--ink-2); } .logo i { font: 500 13px/1 var(--sans); font-style: normal; letter-spacing: .16em; margin-left: 4px; }
.top nav { display: flex; gap: clamp(18px, 2.6vw, 40px); }
.top nav a { position: relative; display: inline-flex; align-items: baseline; gap: 8px; padding: .8em 0; font: 500 12.5px/1 var(--mono); letter-spacing: .16em; text-transform: uppercase; }
.top nav a i { font: 500 12px/1 var(--sans); font-style: normal; letter-spacing: .12em; color: var(--ink-2); text-transform: none; }
.top nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: .3em; height: 1px; background: var(--red); transform: scaleX(0); transform-origin: right; transition: transform .55s cubic-bezier(.65, 0, .25, 1); }
.top nav a:hover::after, .top nav a:focus-visible::after, .top nav a[aria-current="page"]::after { transform: scaleX(1); transform-origin: left; }

/* ───────── stage: the section becomes a space ───────── */
.js .stage { height: 460vh; }
.pin { position: relative; height: 100vh; height: 100svh; overflow: hidden; }
.js .pin { position: sticky; top: 0; }
.draw { position: absolute; left: calc(var(--gut) + 2vw); top: 64px; bottom: 28px; width: min(54vw, calc((100svh - 92px) * .9)); }
.draw svg { display: block; width: 100%; height: 100%; overflow: visible; }
.sec-svg { --w-cut: 3px; --w-edge: 1.5px; --w-dim: 1px; } /* line-weight hierarchy: cut section > edges seen beyond > dimension / extension lines */
.sec-svg .ground line { stroke: var(--ink); stroke-width: 1.6; stroke-dasharray: 4 7; opacity: .5; }
.sec-svg .poche { fill: var(--ink); stroke: var(--ink); stroke-width: var(--w-cut); fill-opacity: 1; }
.sec-svg .thin { fill: none; stroke: var(--ink); stroke-width: var(--w-edge); opacity: .8; } .sec-svg .thin rect, .sec-svg .thin polyline { fill: none; }
.sec-svg .dim line { stroke: var(--ink); stroke-width: var(--w-dim); opacity: .7; } .sec-svg .dim text { font: 500 17px var(--mono); fill: var(--ink); letter-spacing: .06em; }
.sec-svg .lab text { font: 500 24px var(--sans); fill: var(--ink); letter-spacing: .1em; paint-order: stroke; stroke: var(--bg); stroke-width: 6px; } .sec-svg .lab .en { font: 500 14px var(--mono); letter-spacing: .16em; fill: var(--ink-2); }
.sec-svg .rw { opacity: 0; }
.js .stage .sec-svg .rw { opacity: 0; } html:not(.js) .stage .sec-svg .rw { opacity: 1; }
.panel { position: absolute; right: var(--gut); top: 0; bottom: 0; width: min(34vw, 520px); display: flex; flex-direction: column; justify-content: center; padding: 72px 0 40px; }
.k { display: flex; gap: 1.4em; margin-bottom: clamp(16px, 2.6vh, 28px); font: 500 12.5px/1.6 var(--sans); letter-spacing: .16em; color: var(--ink-2); } .k span { font: 500 12px/1.6 var(--mono); color: var(--red-t); }
.panel h1 { font: 600 clamp(38px, 4.4vw, 76px)/1.18 var(--sans); letter-spacing: .02em; margin-bottom: clamp(14px, 2.4vh, 26px); }
.lead { font: 400 clamp(15px, 1.15vw, 18px)/2 var(--sans); letter-spacing: .06em; color: var(--ink-2); max-width: 28em; }
.phase { margin-top: clamp(22px, 4.4vh, 48px); border-top: 1px solid var(--line); padding-top: 14px; }
.ph-k { display: flex; gap: 1.2em; align-items: baseline; font: 500 clamp(18px, 1.5vw, 24px)/1.5 var(--sans); letter-spacing: .12em; } .ph-k span:first-child { font: 500 12.5px/1 var(--mono); color: var(--red-t); letter-spacing: .16em; }
.bar { height: 1px; background: var(--line); margin-top: 12px; } .bar i { display: block; height: 3px; margin-top: -1px; width: calc(var(--p) * 100%); background: var(--ink); }
.rooms { list-style: none; padding: 0; margin-top: 16px; min-height: 5.6em; position: relative; }
.rooms li { position: absolute; inset: 0 0 auto 0; display: grid; gap: 2px; opacity: 0; transform: translateY(8px); transition: opacity .22s, transform .22s; pointer-events: none; }
.rooms li.on { opacity: 1; transform: none; transition: opacity .6s .22s, transform .6s .22s; }
.rooms b { font: 500 clamp(17px, 1.3vw, 21px)/1.6 var(--sans); letter-spacing: .1em; } .rooms .en { font: 500 11.5px/1.6 var(--mono); letter-spacing: .18em; color: var(--ink-2); } .rooms .fact { font: 500 clamp(14px, 1.05vw, 16px)/1.8 var(--mono); letter-spacing: .06em; color: var(--red-t); }
.credit { margin-top: clamp(14px, 2.4vh, 28px); font: 400 12.5px/1.8 var(--sans); letter-spacing: .06em; color: var(--ink-2); }
.hint { position: absolute; left: 0; bottom: 64px; display: flex; align-items: center; gap: 14px; font: 500 12px/1 var(--sans); letter-spacing: .14em; color: var(--ink-2); transition: opacity .6s; } .hint i { width: 36px; height: 1px; background: currentColor; transform-origin: left; animation: hint 2.4s ease-in-out infinite; }
@keyframes hint { 0%, 100% { transform: scaleX(.3); } 50% { transform: scaleX(1); } } .stage.moved .hint { opacity: 0; }
html:not(.js) .stage .rooms li { position: static; opacity: 1; transform: none; margin-bottom: 8px; } html:not(.js) .stage .rooms { min-height: 0; } html:not(.js) .hint { display: none; }

/* ───────── sections ───────── */
.sec { max-width: 1560px; margin: 0 auto; padding: clamp(80px, 10vw, 170px) var(--gut) 0; }
.sh { display: flex; justify-content: space-between; align-items: baseline; gap: 24px; padding-top: 14px; border-top: 1px solid var(--ink); margin-bottom: clamp(32px, 4vw, 64px); }
.sh h2 { display: flex; align-items: baseline; gap: 1.2em; font: 600 clamp(24px, 2.6vw, 40px)/1.4 var(--sans); letter-spacing: .06em; }
.sh h2 em { font: 500 12.5px/1 var(--mono); letter-spacing: .18em; color: var(--ink-2); text-transform: uppercase; }
.no { font: 500 12.5px/1 var(--mono); letter-spacing: .18em; color: var(--red-t); }
.all, .btn { display: inline-flex; align-items: center; gap: 18px; font: 500 14px/1.4 var(--sans); letter-spacing: .12em; padding: 10px 0; border-bottom: 1px solid currentColor; }
.all i, .btn i, .back i, .pc-go i, .chip i { display: inline-block; width: 28px; height: 1px; background: currentColor; transition: width .5s cubic-bezier(.2, .7, .1, 1); } .all:hover i, .btn:hover i, .back:hover i { width: 52px; }
.btn--red { color: var(--red-t); }
.pcs { list-style: none; padding: 0; display: grid; gap: clamp(20px, 2.6vw, 44px) clamp(16px, 2vw, 32px); }
.pcs--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); } .pcs--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .pcs--1 { grid-template-columns: minmax(0, 1fr); max-width: 760px; }
.pc a, .pc > div { display: grid; gap: 14px; height: 100%; align-content: start; }
.pc-img { position: relative; display: block; aspect-ratio: 4 / 3; overflow: hidden; background: #d4d1c9; }
.pc-img img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 50% 52%; transition: transform 1.2s cubic-bezier(.2, .7, .1, 1); }
.pc-meta { display: grid; gap: 4px; }
.pc-meta b { font: 600 clamp(18px, 1.5vw, 24px)/1.5 var(--sans); letter-spacing: .06em; } .pc-meta em { font: 500 11.5px/1.5 var(--mono); letter-spacing: .18em; color: var(--ink-2); }
.pc-meta > span { font: 400 14px/1.8 var(--mono); letter-spacing: .04em; color: var(--ink-2); } .pc-meta .pc-note { font-family: var(--sans); letter-spacing: .06em; color: var(--ink); }
.pc-go { display: inline-flex; align-items: center; gap: 14px; margin-top: 6px; color: var(--red-t) !important; font: 500 13.5px/1.4 var(--sans) !important; letter-spacing: .1em !important; }
.pc-skip { margin-top: 6px; font: 400 13px/1.7 var(--sans) !important; color: var(--ink-2) !important; }
@media (hover: hover) { .pc a:hover .pc-img img { transform: scale(1.035); } .pc a:hover .pc-go i { width: 52px; } }
.sec--quote .quote { font: 600 clamp(26px, 3.5vw, 58px)/1.7 var(--sans); letter-spacing: .04em; max-width: 22em; margin-bottom: clamp(36px, 5vw, 80px); } .quote mark { background: none; color: var(--red-t); }
.trio { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 3vw, 48px); margin-bottom: clamp(32px, 4vw, 56px); }
.trio > div { border-top: 1px solid var(--line); padding-top: 14px; } .trio .n { font: 500 13px/1 var(--mono); color: var(--red-t); letter-spacing: .16em; } .trio h3 { margin: 10px 0 6px; font: 600 clamp(17px, 1.4vw, 22px)/1.6 var(--sans); letter-spacing: .06em; } .trio p { font-size: 15px; color: var(--ink-2); }
.sec--cta { padding-bottom: clamp(60px, 8vw, 120px); } .cta-t { font: 600 clamp(30px, 4vw, 66px)/1.5 var(--sans); letter-spacing: .04em; } .cta-p { margin: 18px 0 32px; font-size: 16px; color: var(--ink-2); }

.pagehead { max-width: 1560px; margin: 0 auto; padding: clamp(120px, 14vw, 220px) var(--gut) 0; }
.pagehead .no { margin-bottom: 18px; } .pagehead h1 { font: 600 clamp(44px, 7vw, 120px)/1.1 var(--sans); letter-spacing: .02em; } .pagehead h1 em { display: block; margin-top: 12px; font: 500 12.5px/1.6 var(--mono); letter-spacing: .2em; color: var(--ink-2); } .pagehead .lead { margin-top: 22px; max-width: 34em; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: clamp(28px, 3vw, 48px); }
.chip-f { display: inline-flex; align-items: baseline; gap: 10px; padding: 10px 18px; border: 1px solid var(--ink); border-radius: 99px; background: transparent; color: var(--ink); font: 500 14px/1.4 var(--sans); letter-spacing: .1em; cursor: pointer; transition: background .3s, color .3s; } .chip-f i { font: 500 11.5px/1 var(--mono); font-style: normal; color: var(--ink-2); }
.chip-f[aria-pressed="true"] { background: var(--ink); color: var(--bg); } .chip-f[aria-pressed="true"] i { color: var(--bg); opacity: .75; }
.none { font-size: 15px; color: var(--ink-2); }

.cmp { margin: 0; display: grid; grid-template-columns: minmax(0, 1fr); gap: 14px; }
.cmp-stage { position: relative; width: min(100%, calc((100svh - 140px) * .9)); aspect-ratio: 9 / 10; margin: 0 auto; background: var(--paper); overflow: hidden; }
.cmp-stage img, .cmp-lines { position: absolute; inset: 0; width: 100%; height: 100%; }
.cmp-stage img { object-fit: cover; clip-path: inset(0 calc((100 - var(--v, 100)) * 1% ) 0 0); } .cmp-lines svg { width: 100%; height: 100%; display: block; } .cmp-lines .poche { fill-opacity: calc(1 - var(--vv, 1)); fill: var(--ink); }
.cmp-lines { background: transparent; }
.cmp figcaption { display: grid; gap: 8px; width: min(100%, calc((100svh - 140px) * .9)); margin: 0 auto; }
.cmp label { display: flex; justify-content: space-between; font: 500 12.5px/1 var(--mono); letter-spacing: .16em; } .cmp input[type=range] { width: 100%; accent-color: var(--red-t); height: 32px; }
.cmp-n { font: 400 13.5px/1.8 var(--sans); color: var(--ink-2); }
.facts { max-width: 880px; margin: clamp(40px, 5vw, 72px) auto 0; } .facts div { display: grid; grid-template-columns: 9em minmax(0, 1fr); gap: 16px; padding: 13px 0; border-top: 1px solid var(--line); } .facts div:last-child { border-bottom: 1px solid var(--line); }
.facts dt { font: 500 12.5px/2 var(--mono); letter-spacing: .14em; color: var(--ink-2); } .facts dd { margin: 0; font: 500 16px/1.8 var(--sans); letter-spacing: .06em; } .facts--s { max-width: none; margin-top: 0; }
.gal { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(18px, 2.4vw, 40px); } .gf { margin: 0; } .gf:first-child { grid-column: 1 / -1; }
.gf img { display: block; width: 100%; height: auto; aspect-ratio: 3 / 2; object-fit: cover; background: #d4d1c9; } .gf figcaption { margin-top: 10px; font: 400 14px/1.8 var(--sans); color: var(--ink-2); } .gf figcaption span { margin-right: 1em; font: 500 12px var(--mono); color: var(--red-t); letter-spacing: .16em; }
.prin { list-style: none; padding: 0; display: grid; gap: 0; } .prin li { display: grid; grid-template-columns: 5em minmax(0, .9fr) minmax(0, 1.4fr); gap: clamp(16px, 3vw, 48px); padding: 26px 0; border-top: 1px solid var(--line); align-items: baseline; } .prin li:last-child { border-bottom: 1px solid var(--line); }
.prin span { font: 500 13px/1 var(--mono); color: var(--red-t); letter-spacing: .16em; } .prin h3 { font: 600 clamp(20px, 1.9vw, 30px)/1.5 var(--sans); letter-spacing: .06em; } .prin p { font-size: 15.5px; color: var(--ink-2); max-width: 34em; }
.mem { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(16px, 2vw, 32px); } .mem li { border-top: 1px solid var(--line); padding-top: 16px; display: grid; gap: 6px; align-content: start; }
.av { display: grid; place-items: center; width: 64px; height: 64px; border: 1px solid var(--ink); border-radius: 50%; font: 500 14px var(--mono); letter-spacing: .08em; margin-bottom: 8px; } .mem b { font: 600 15px/1.6 var(--sans); letter-spacing: .08em; } .mem p { font-size: 14.5px; color: var(--ink-2); }
.fine { margin-top: 16px; font-size: 13px; color: var(--ink-2); }
.flow { list-style: none; padding: 0; counter-reset: f; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--ink); } .flow li { counter-increment: f; display: grid; gap: 6px; align-content: start; padding: 18px clamp(10px, 1.6vw, 24px) 22px 0; } .flow li + li { padding-left: clamp(10px, 1.6vw, 24px); border-left: 1px solid var(--line); }
.flow li::before { content: counter(f, decimal-leading-zero); font: 500 12.5px/1 var(--mono); color: var(--red-t); letter-spacing: .16em; } .flow b { font: 600 clamp(16px, 1.3vw, 20px)/1.6 var(--sans); letter-spacing: .06em; } .flow span { font-size: 14.5px; color: var(--ink-2); }
.flow--v { grid-template-columns: minmax(0, 1fr); margin-bottom: 32px; } .flow--v li + li { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; }
.two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(32px, 6vw, 112px); align-items: start; }
.faq details { border-top: 1px solid var(--line); } .faq details:last-child { border-bottom: 1px solid var(--line); } .faq summary { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 20px 0; cursor: pointer; list-style: none; font: 500 clamp(15px, 1.25vw, 18px)/1.7 var(--sans); letter-spacing: .06em; } .faq summary::-webkit-details-marker { display: none; }
.faq summary i { position: relative; flex: none; width: 14px; height: 14px; } .faq summary i::before, .faq summary i::after { content: ""; position: absolute; left: 0; top: 50%; width: 14px; height: 1px; background: currentColor; transition: transform .4s; } .faq summary i::after { transform: rotate(90deg); } .faq details[open] summary i::after { transform: rotate(0); } .faq p { margin: 0 0 22px; max-width: 40em; font-size: 15px; color: var(--ink-2); }

.foot { margin-top: clamp(60px, 8vw, 130px); background: var(--ink); color: var(--bg); padding: clamp(40px, 5vw, 80px) var(--gut) 100px; }
.foot-in { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 112px); max-width: 1560px; margin: 0 auto; }
.fiction { font: 400 14px/2 var(--sans); color: rgba(228, 225, 218, .82); } .fiction b { display: block; font: 600 clamp(17px, 1.5vw, 22px)/1.8 var(--sans); color: var(--bg); margin-bottom: 8px; letter-spacing: .06em; }
.spec-k { font: 500 12.5px/1.8 var(--mono); letter-spacing: .14em; color: #f08b72; margin-bottom: 8px; } .spec ul { list-style: none; padding: 0; } .spec li { padding: 8px 0; border-top: 1px solid rgba(228, 225, 218, .22); font-size: 14px; } .spec-n { margin-top: 12px; font-size: 13px; line-height: 1.9; color: rgba(228, 225, 218, .75); }
.back { display: inline-flex; align-items: center; gap: 16px; margin-top: 18px; padding: 10px 0; border-bottom: 1px solid currentColor; font: 500 14px/1.4 var(--sans); letter-spacing: .12em; }
.copy { max-width: 1560px; margin: 40px auto 0; font: 400 12px/1.6 var(--mono); letter-spacing: .1em; color: rgba(228, 225, 218, .6); }
.chip { position: fixed; z-index: 45; left: 50%; bottom: 14px; transform: translateX(-50%); display: inline-flex; align-items: center; gap: 12px; padding: 9px 16px; border-radius: 99px; background: rgba(27, 27, 26, .92); color: var(--bg); font: 500 11.5px/1 var(--mono); letter-spacing: .12em; white-space: nowrap; backdrop-filter: blur(8px); } .chip span { opacity: .75; font-family: var(--sans); letter-spacing: .08em; }

.js .rv { opacity: 0; transform: translateY(18px); transition: opacity 1s ease, transform 1.2s cubic-bezier(.16, .84, .2, 1); } .js .rv.in { opacity: 1; transform: none; }

/* ───────── narrow: the drawing on top (pinned), the words below — a different composition ───────── */
@media (max-width: 900px) {
  body::before { opacity: .35; }
  .logo span, .logo i, .top nav a i { display: none; } .logo b { font-size: 14px; letter-spacing: .2em; } .top nav { gap: 4px; } .top nav a { min-height: 44px; padding: 0 10px; align-items: center; font-size: 12px; letter-spacing: .12em; } .top { padding-top: 6px; padding-bottom: 6px; }
  .draw { left: var(--gut); right: var(--gut); top: 62px; bottom: auto; width: auto; height: calc(100svh - 62px - 226px); max-height: 56svh; }
  .draw svg { margin: 0 auto; width: auto; max-width: 100%; }
  .panel { left: var(--gut); right: var(--gut); width: auto; top: auto; bottom: 0; padding: 0 0 62px; justify-content: flex-end; }
  .panel h1 { font-size: 30px; margin-bottom: 8px; } .panel .k, .panel .lead, .credit, .hint { display: none; }
  .phase { margin-top: 0; } .rooms { min-height: 5.2em; }
  .pcs--3, .pcs--2, .trio, .mem, .flow, .two, .foot-in, .gal { grid-template-columns: minmax(0, 1fr); } .gf:first-child { grid-column: auto; }
  .flow li + li { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; }
  .prin li { grid-template-columns: 3em minmax(0, 1fr); } .prin p { grid-column: 2; }
  .facts div { grid-template-columns: 7em minmax(0, 1fr); } .chip span { display: none; }
  .sh { flex-direction: column; gap: 8px; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .hint i { animation: none; } .rooms li, .rooms li.on, .top nav a::after, .pc-img img { transition: none; } }

/* header labels never wrap */
.top, .top a, .top nav a, .logo, .top .shop { white-space: nowrap; }