/* DB — Portfolio (index + case pages). Same tokens and grid as /index and /brief. */
:root{
  --bg:#F3F3F1; --surface:#FFFFFF; --line:#E2E2DF; --ink:#222222; --muted:#66645F;
  --mint:#8EDDC2; --yellow:#F2D04B; --coral:#E8674A; --guide:#D9D9D5;
  --f-display:"Host Grotesk", ui-sans-serif, system-ui, sans-serif;
  --f-mono:"Martian Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --cols:4; --gutter:12px; --margin:16px; --max:1440px; --chamfer:14px;
  --ease:cubic-bezier(.7,0,.2,1); --ease-out:cubic-bezier(.16,1,.3,1);
}
@media (min-width:1024px){ :root{ --cols:12; --gutter:20px; --margin:40px; --chamfer:18px; } }

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--f-display);font-size:16px;line-height:1.45;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit}
button{font:inherit;color:inherit}
img,video{display:block;max-width:100%}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px}
.mono{font-family:var(--f-mono);font-stretch:87.5%;font-size:10.5px;letter-spacing:.02em;text-transform:uppercase;line-height:1.5}
.muted{color:var(--muted)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

.guides{position:fixed;inset:0;z-index:0;pointer-events:none;display:grid;grid-template-columns:repeat(calc(var(--cols) / 2),1fr);column-gap:var(--gutter);width:100%;max-width:var(--max);margin:0 auto;padding:0 var(--margin)}
.guides i{border-left:1px dashed var(--guide);border-right:1px dashed var(--guide)}

.page{position:relative;z-index:1;display:grid;grid-template-columns:repeat(var(--cols),minmax(0,1fr));column-gap:var(--gutter);max-width:var(--max);margin:0 auto;padding:0 var(--margin);min-height:100svh;align-content:start}

/* ── top bar ── */
.top{grid-column:1/-1;display:flex;gap:14px;align-items:center;padding:16px 0 14px;color:var(--muted)}
.top a{text-decoration:none;color:var(--ink);display:inline-flex;gap:6px;align-items:center;white-space:nowrap}
.top a:hover{text-decoration:underline;text-underline-offset:3px}
.top > :nth-child(2){margin-left:auto}
.top > :nth-child(3){white-space:nowrap;color:var(--ink)}
.top > :nth-child(4){display:none}
.dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--mint);margin-right:7px;vertical-align:1px}
.lang{display:inline-flex;gap:2px;align-items:center;color:var(--muted)}
.lang button{background:none;border:0;padding:4px 3px;cursor:pointer;color:var(--muted);font:inherit;letter-spacing:inherit;text-transform:inherit}
.lang button.on{color:var(--ink);text-decoration:underline;text-decoration-color:var(--coral);text-decoration-thickness:2px;text-underline-offset:4px}
.lang button:hover{color:var(--ink)}

.tag{display:none}
.bar{grid-column:1/-1;background:var(--ink);color:#D9D8D3;display:flex;flex-wrap:wrap;gap:6px 22px;justify-content:space-between;padding:13px 16px 12px;margin:56px 0 16px}

/* reveal on scroll */
.js .rv{opacity:0;transform:translateY(16px);transition:opacity .9s var(--ease-out),transform 1s var(--ease-out)}
.js .rv.in{opacity:1;transform:none}

/* chamfered media frame */
.frame{position:relative;overflow:hidden;background:var(--line);clip-path:polygon(0 0,calc(100% - var(--chamfer)) 0,100% var(--chamfer),100% 100%,0 100%)}
.frame img,.frame video{width:100%;height:100%;object-fit:cover}

/* ═════════════════════════ INDEX ═════════════════════════ */
.pf-side{grid-column:1/-1;padding:14px 0 6px}
.pf-title{margin:0;font-weight:600;font-size:clamp(52px,15vw,66px);line-height:.86;letter-spacing:-.058em}
.pf-meta{margin:14px 0 0}
.filters{display:flex;flex-wrap:wrap;gap:6px;margin-top:22px}
.filters button{background:var(--surface);border:1px solid var(--line);padding:8px 10px 7px;cursor:pointer;color:var(--ink);font:inherit;letter-spacing:inherit;text-transform:inherit;display:inline-flex;gap:8px;align-items:center;transition:background .25s,color .25s,border-color .25s}
.filters button i{font-style:normal;color:var(--muted)}
.filters button[aria-pressed="true"]{background:var(--ink);color:var(--surface);border-color:var(--ink)}
.filters button[aria-pressed="true"] i{color:var(--yellow)}
@media (hover:hover){ .filters button:hover{border-color:var(--ink)} }

.pf-main{grid-column:1/-1;padding:26px 0 0}
.pf-list{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.pf-row[hidden]{display:none}
.pf-row a{
  position:relative;isolation:isolate;display:grid;grid-template-columns:1fr auto;grid-template-areas:"img img" "code arrow" "name name" "sector sector" "tags tags";
  gap:2px 14px;background:var(--surface);padding:0 0 16px;text-decoration:none;
  clip-path:polygon(0 0,calc(100% - var(--chamfer)) 0,100% var(--chamfer),100% 100%,0 100%);
}
.pf-row a::before{content:"";position:absolute;inset:0;z-index:-1;background:var(--yellow);transform:scaleX(0);transform-origin:left;transition:transform .55s var(--ease)}
.pf-row__img{grid-area:img;aspect-ratio:3/2;width:100%;object-fit:cover;margin-bottom:14px;background:var(--line)}
.pf-row__code{grid-area:code;color:var(--muted);padding-left:16px}
.pf-row__arrow{grid-area:arrow;width:16px;height:16px;margin-right:16px;align-self:center;transition:transform .45s var(--ease)}
.pf-row__name{grid-area:name;font-weight:600;font-size:32px;letter-spacing:-.045em;line-height:1;margin-top:6px;padding:0 16px}
.pf-row__sector{grid-area:sector;color:var(--muted);font-size:14.5px;padding:0 16px;margin-top:4px}
.pf-row__tags{grid-area:tags;color:var(--muted);padding:0 16px;margin-top:8px}
.pf-row a:focus-visible{outline:none}
.pf-row a:focus-visible::before{transform:scaleX(1)}
@media (hover:hover){
  .pf-row a:hover::before{transform:scaleX(1)}
  .pf-row a:hover .pf-row__arrow{transform:translateX(4px)}
  .pf-row a:hover .pf-row__sector,.pf-row a:hover .pf-row__code,.pf-row a:hover .pf-row__tags{color:var(--ink)}
}
.pf-empty{display:none;color:var(--muted);padding:20px 0}
.pf-empty.on{display:block}

.follow{position:fixed;left:0;top:0;z-index:50;width:280px;pointer-events:none;opacity:0;transform:translate3d(-999px,-999px,0);transition:opacity .25s}
.follow.on{opacity:1}
.follow__img{aspect-ratio:3/2;overflow:hidden;background:var(--ink);clip-path:polygon(0 0,calc(100% - 14px) 0,100% 14px,100% 100%,0 100%)}
.follow__img img{width:100%;height:100%;object-fit:cover}
.follow__cap{display:flex;justify-content:space-between;background:var(--ink);color:var(--bg);padding:6px 8px 5px}

/* ═════════════════════════ CASE ═════════════════════════ */
.case-head{grid-column:1/-1;padding:18px 0 0;display:grid;gap:14px}
.case-code{display:flex;gap:10px;align-items:center;color:var(--muted)}
.case-code b{font-weight:500;background:var(--yellow);color:var(--ink);padding:2px 6px 1px}
.case-name{margin:0;font-weight:600;font-size:clamp(56px,16vw,72px);line-height:.86;letter-spacing:-.06em;text-wrap:balance}
.case-sum{margin:0;font-size:20px;line-height:1.28;letter-spacing:-.02em;max-width:26ch;text-wrap:pretty}
.case-tags{display:flex;flex-wrap:wrap;gap:6px}
.case-tags span{background:var(--surface);padding:4px 7px 3px}
.case-cover{grid-column:1/-1;margin:26px 0 0;aspect-ratio:3/2}

.case-info{grid-column:1/-1;display:grid;grid-template-columns:subgrid;align-items:start}
.case-spec{grid-column:1/-1;margin:34px 0 0}
.case-spec h2,.case-story h2,.sec-h{margin:0 0 14px;font-size:17px;font-weight:600;letter-spacing:-.02em}
.spec .r{display:flex;align-items:baseline;gap:8px;padding:6px 0}
.spec dt{color:var(--muted);white-space:nowrap}
.spec .lead{flex:1;border-bottom:1px dotted #AEADA8;transform:translateY(-3px);min-width:16px}
.spec dd{margin:0;text-align:right;max-width:70%}
.spec dd.long{text-transform:none;font-family:var(--f-display);font-stretch:normal;letter-spacing:0;font-size:14px;line-height:1.35}

.case-story{grid-column:1/-1;margin:40px 0 0;display:grid;gap:8px}
.beat{background:var(--surface);padding:18px 18px 20px;display:grid;gap:10px}
.beat__n{color:var(--muted);display:flex;gap:10px}
.beat__n b{font-weight:500;color:var(--ink)}
.beat p{margin:0;font-size:17px;line-height:1.45;letter-spacing:-.01em;text-wrap:pretty}

.case-gallery{grid-column:1/-1;margin:48px 0 0;display:grid;grid-template-columns:1fr;gap:8px}
.case-gallery .frame{aspect-ratio:4/5}

.case-motion{grid-column:1/-1;margin:48px 0 0;display:grid;gap:16px}
.case-motion .frame{aspect-ratio:9/16;max-height:82svh;width:auto;justify-self:center;background:var(--ink)}
.case-motion p{margin:0;color:var(--muted);max-width:34ch}

/* process: the one dark band per page */
.case-process{grid-column:1/-1;margin:56px calc(50% - 50vw) 0;background:var(--ink);color:var(--bg);padding:40px var(--margin) 44px}
.case-process .inner{max-width:var(--max);margin:0 auto;display:grid;gap:18px}
.case-process .sec-h{color:var(--bg)}
.case-process .lede{margin:0;color:#B9B8B3;max-width:44ch}
.proc{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.proc figure{margin:0}
.proc .frame{aspect-ratio:1/1;background:#333}
.proc figcaption{color:#8F8D87;padding-top:6px}

.case-next{grid-column:1/-1;margin:56px 0 0}
.case-next a{display:grid;gap:14px;text-decoration:none;position:relative}
.case-next .mono{color:var(--muted);display:flex;justify-content:space-between}
.case-next__name{font-weight:600;font-size:clamp(44px,12vw,56px);letter-spacing:-.055em;line-height:.9;display:flex;align-items:center;gap:14px}
.case-next__name svg{width:30px;height:30px;transition:transform .45s var(--ease)}
.case-next .frame{aspect-ratio:3/1}
.case-next .frame img{transition:transform 1.2s var(--ease-out)}
@media (hover:hover){
  .case-next a:hover .case-next__name svg{transform:translateX(8px)}
  .case-next a:hover .frame img{transform:scale(1.03)}
}

/* ═════════════════════════ TABLET ═════════════════════════ */
@media (min-width:640px){
  .case-gallery{grid-template-columns:1fr 1fr}
  .proc{grid-template-columns:repeat(3,1fr)}
  .case-story{grid-template-columns:repeat(2,1fr)}
}

/* ═════════════════════════ DESKTOP ═════════════════════════ */
@media (min-width:1024px){
  .mono{font-size:11px}
  .top{display:grid;grid-template-columns:subgrid;padding:22px 0 18px}
  .top > :nth-child(1){grid-column:1/4}
  .top > :nth-child(2){grid-column:5/7;margin-left:0;justify-self:start}
  .top > :nth-child(3){grid-column:7/10;color:var(--muted)}
  .top > :nth-child(4){display:block;grid-column:10/13;justify-self:end}
  .tag{display:block;grid-column:6;grid-row:2;justify-self:center;align-self:start;margin-top:48px;writing-mode:vertical-rl;background:var(--yellow);color:var(--ink);padding:14px 8px;font-size:13px;letter-spacing:.06em;position:sticky;top:48px}
  .bar{flex-wrap:nowrap;padding:13px 20px 12px;margin-top:80px}

  /* index */
  .pf-side{grid-column:1/6;grid-row:2;position:sticky;top:0;align-self:start;padding:40px 0}
  .pf-title{font-size:clamp(76px,7.6vw,118px)}
  .pf-meta{margin-top:18px}
  .filters{margin-top:36px}
  .pf-main{grid-column:7/13;grid-row:2;padding:40px 0 0}
  .pf-list{gap:8px}
  .pf-row a{grid-template-columns:96px 1fr auto;grid-template-areas:"code name arrow" "code sector arrow" "code tags arrow";padding:22px 24px 22px 22px;column-gap:20px}
  .pf-row__img{display:none}
  .pf-row__code,.pf-row__name,.pf-row__sector,.pf-row__tags{padding:0}
  .pf-row__code{align-self:start;padding-top:8px}
  .pf-row__name{font-size:44px;margin:0}
  .pf-row__arrow{margin:0}

  /* case */
  .case-head{grid-column:1/-1;grid-template-columns:subgrid;align-items:end;padding:44px 0 0;row-gap:16px}
  .case-code{grid-column:1/7}
  .case-name{grid-column:1/8;font-size:clamp(96px,10vw,156px)}
  .case-sum{grid-column:9/13;font-size:24px;justify-self:end;max-width:24ch}
  .case-tags{grid-column:9/13;justify-content:flex-end}
  .case-cover{margin-top:36px}
  .case-spec{grid-column:1/6;margin-top:56px;align-self:start;position:sticky;top:24px}
  .case-story{grid-column:7/13;margin-top:56px;grid-template-columns:1fr;gap:8px}
  .beat{grid-template-columns:170px 1fr;padding:24px}
  .beat p{font-size:19px}
  .case-gallery{gap:20px;margin-top:80px;grid-template-columns:1fr 1fr}
  .case-motion{grid-template-columns:subgrid;margin-top:80px;align-items:center}
  .case-motion .txt{grid-column:1/6}
  .case-motion .frame{grid-column:7/13;justify-self:start;height:82svh;max-height:880px}
  .case-process{margin-top:96px;padding:72px 0 80px}
  .case-process .inner{grid-template-columns:repeat(12,1fr);column-gap:var(--gutter);padding:0 var(--margin)}
  .case-process .head{grid-column:1/5}
  .proc{grid-column:6/13;grid-template-columns:repeat(3,1fr);gap:12px}
  .case-next{margin-top:96px}
  .case-next .frame{aspect-ratio:4/1}
  .case-next__name{font-size:clamp(64px,7vw,112px)}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition-duration:.01ms!important}
  .js .rv{opacity:1;transform:none}
}

/* ── case: call to action (links back to the brief) ── */
.case-cta{grid-column:1/-1;margin:56px 0 0;background:var(--surface);padding:22px 18px;display:grid;gap:16px;clip-path:polygon(0 0,calc(100% - var(--chamfer)) 0,100% var(--chamfer),100% 100%,0 100%)}
.case-cta p{margin:0;font-weight:600;font-size:26px;letter-spacing:-.04em;line-height:1.05}
.btn{position:relative;isolation:isolate;display:inline-flex;align-items:center;justify-content:center;gap:10px;border:0;cursor:pointer;padding:15px 20px 14px;font-weight:600;font-size:16px;letter-spacing:-.01em;text-decoration:none;background:var(--ink);color:var(--surface);clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,0 100%);transition:color .35s var(--ease)}
.btn::before{content:"";position:absolute;inset:0;z-index:-1;background:var(--coral);transform:scaleX(0);transform-origin:left;transition:transform .5s var(--ease)}
.btn svg{width:16px;height:16px;transition:transform .4s var(--ease)}
.btn:focus-visible::before,.btn:active::before{transform:scaleX(1)}
.btn:focus-visible{color:var(--ink)}
@media (hover:hover){ .btn:hover::before{transform:scaleX(1)} .btn:hover{color:var(--ink)} .btn:hover svg{transform:translateX(3px)} }
@media (min-width:1024px){
  .case-cta{grid-template-columns:1fr auto;align-items:center;padding:32px 32px 32px 28px;margin-top:96px}
  .case-cta p{font-size:40px}
}