/* Production build. Layout: overview of selected work; opening a project keeps the others one step away
   in a rail beside the case study. Visual direction is provisional until the visual system is applied. */
:root{
  --bg:#ECEEF0; --surface:#FFFFFF; --ink:#14181D; --muted:#59616B; --line:#D3D8DD; --accent:#2D4FB5;
  --accent-soft:#DCE3F7; --scrim:rgba(20,24,29,.28); --good:#1F7A4A; --warn:#9A6100; --bad:#B23A3A;
  --p-aeria:#C3D7EC; --p-vikasa:#ECDAB8; --p-nura:#C8DBCB; --mark:rgba(20,24,29,.16); --pane:rgba(255,255,255,.55);
  --f-display:"Bricolage Grotesque", "Helvetica Neue", Arial, sans-serif;
  --f-body:"Figtree", "Helvetica Neue", Arial, sans-serif;
  --f-mono:"IBM Plex Mono", ui-monospace, Menlo, monospace;
  --hdr:56px; --rail-h:0px; --ease:cubic-bezier(.2,.7,.2,1); --dur:440ms;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#101317; --surface:#181C22; --ink:#E6E9ED; --muted:#98A0AA; --line:#2A3038; --accent:#93A9F5;
  --accent-soft:#232C45; --scrim:rgba(0,0,0,.5); --good:#6BCB97; --warn:#E3B05A; --bad:#F08A8A;
  --p-aeria:#22364C; --p-vikasa:#43361F; --p-nura:#243A2B; --mark:rgba(230,233,237,.16); --pane:rgba(230,233,237,.12); color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#101317; --surface:#181C22; --ink:#E6E9ED; --muted:#98A0AA; --line:#2A3038; --accent:#93A9F5;
  --accent-soft:#232C45; --scrim:rgba(0,0,0,.5); --good:#6BCB97; --warn:#E3B05A; --bad:#F08A8A;
  --p-aeria:#22364C; --p-vikasa:#43361F; --p-nura:#243A2B; --mark:rgba(230,233,237,.16); --pane:rgba(230,233,237,.12); color-scheme:dark}

*{box-sizing:border-box}
body{background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}
button,input{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer;padding:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
h1,h2,h3{font-family:var(--f-display);font-weight:650;letter-spacing:-.01em;text-wrap:balance;margin:0}
h1:focus,h2:focus{outline:none}
h1:focus-visible,h2:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
.mono{font-family:var(--f-mono);font-size:12px;letter-spacing:.04em}
.wrap{max-width:1120px;margin:0 auto;padding-inline:24px}
@media (max-width:600px){.wrap{padding-inline:16px}}

/* Site header */
.site{position:sticky;top:env(safe-area-inset-top,0px);z-index:30;height:var(--hdr);background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.site .wrap{height:100%;display:flex;align-items:center;gap:16px}
.brand{display:flex;align-items:baseline;gap:10px;min-width:0}
.brand b{font-family:var(--f-display);font-weight:650;font-size:17px;white-space:nowrap}
.brand span{color:var(--muted);font-size:14px;white-space:nowrap}
.site nav{margin-left:auto;display:flex;gap:4px}
.site nav button{padding:6px 10px;border-radius:8px;font-size:14px;color:var(--muted)}
.site nav button:hover{color:var(--ink);background:var(--surface)}
@media (max-width:520px){.brand span{display:none}}

/* Overview */
#overview{padding-block:56px 96px}
.intro{max-width:720px;display:grid;gap:16px;margin-bottom:56px}
.intro h1{font-size:clamp(32px,5vw,52px);line-height:1.06}
.intro p{color:var(--muted);font-size:18px;max-width:60ch;margin:0}
.eyebrow{font-family:var(--f-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0}
.sechead{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:20px}
.sechead h2{font-size:22px}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
@media (max-width:860px){.grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.grid{grid-template-columns:1fr}}
.card{display:grid;gap:12px;text-align:left;padding:12px 12px 18px;border-radius:16px;background:var(--surface);border:1px solid var(--line);transition:border-color .2s, transform .2s var(--ease)}
.card:hover{border-color:color-mix(in srgb,var(--accent) 45%,var(--line));transform:translateY(-2px)}
.card .cover{aspect-ratio:4/3;border-radius:10px}
.card .meta{padding-inline:6px;display:grid;gap:4px;min-width:0}
.card h3{font-size:22px}
.card p{margin:0;color:var(--muted);font-size:15px}
.memo{display:flex;align-items:center;gap:8px;color:var(--accent);margin-top:6px}
.memo::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent);flex:none}
.card.returned{animation:pulse 1.6s var(--ease)}
@keyframes pulse{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--accent) 50%,transparent)}100%{box-shadow:0 0 0 14px transparent}}
.about{margin-top:72px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.4fr);gap:32px;border-top:1px solid var(--line);padding-top:32px}
@media (max-width:760px){.about{grid-template-columns:1fr}}
.about p{margin:0 0 12px;color:var(--muted);max-width:62ch}
.xp{list-style:none;margin:0;padding:0;display:grid}
.xp li{display:flex;justify-content:space-between;gap:16px;padding-block:14px;border-bottom:1px solid var(--line)}
.xp li span:last-child{color:var(--muted);white-space:nowrap}
.ph{color:var(--muted);font-style:italic}

/* Covers */
.cover{background-color:var(--pc);background-repeat:no-repeat}
.cover{position:relative;overflow:hidden}
.cover.has-img,.cover.cv-bars{background:var(--surface);border:1px solid var(--line)}
.cover img{display:block;width:100%;height:100%;object-fit:contain}
.rail-item .cover img{object-fit:cover}
.cv-tag{position:absolute;left:8px;bottom:8px;max-width:calc(100% - 16px);font-family:var(--f-mono);font-size:10.5px;letter-spacing:.02em;line-height:1.3;color:var(--ink);background:color-mix(in srgb,var(--bg) 88%,transparent);padding:3px 8px;border-radius:999px}
.bars{position:absolute;left:12%;right:12%;top:16%;bottom:24%;display:flex;align-items:flex-end;gap:5%}
.rail-item .bars{left:14%;right:14%;top:18%;bottom:14%;gap:6%}
.bars i{flex:1;background:var(--accent);border-radius:3px 3px 0 0}
.bars i.b{opacity:.35}
.card-dec{font-size:13.5px!important;color:var(--ink)!important;margin-top:6px!important;line-height:1.45}
.card-dec span,.keydec .eyebrow{display:block;font-family:var(--f-mono);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);margin-bottom:2px}
.keydec{margin:0;max-width:60ch;font-size:16px;padding:10px 0 10px 14px;border-left:2px solid var(--accent)}
.status{font-size:13px;color:var(--muted);margin:0 0 8px;max-width:70ch}

.c-aeria{--pc:var(--p-aeria);background-image:linear-gradient(var(--pane),var(--pane)),linear-gradient(var(--pane),var(--pane)),linear-gradient(var(--pane),var(--pane));background-size:44% 50%;background-position:20% 74%,40% 50%,60% 26%}
.c-vikasa{--pc:var(--p-vikasa);background-image:linear-gradient(90deg,transparent 58%,var(--pane) 58% 78%,transparent 78%),radial-gradient(var(--mark) 1.6px,transparent 2.2px);background-size:100% 100%,16px 16px;background-repeat:no-repeat,repeat}
.c-nura{--pc:var(--p-nura);background-image:repeating-radial-gradient(circle at 72% 115%,transparent 0 20px,var(--mark) 20px 21.5px)}

/* Study shell */
#study{position:relative}
#study .shell{max-width:1120px;margin:0 auto;padding-inline:24px}
@media (max-width:600px){#study .shell{padding-inline:16px}}
.studybar{position:sticky;z-index:20;top:calc(env(safe-area-inset-top,0px) + var(--hdr) + var(--rail-h));background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.studybar .row{display:flex;align-items:center;gap:12px;padding:10px 0;min-width:0}
.btn{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;border:1px solid var(--line);background:var(--surface);font-size:14px;font-weight:500;white-space:nowrap}
.btn:hover{border-color:var(--accent)}
.btn.primary{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.btn.sm{padding:5px 10px;font-size:13px}
#trail{flex:1;min-width:0;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;color:var(--muted)}
#trail b{color:var(--ink);font-weight:500}
.toc{display:flex;gap:4px;overflow-x:auto;padding-bottom:10px;scrollbar-width:none}
.toc::-webkit-scrollbar{display:none}
.toc button{padding:5px 10px;border-radius:999px;font-size:13px;color:var(--muted);white-space:nowrap}
.toc button[aria-current]{background:var(--accent-soft);color:var(--ink)}
.progress{height:2px;margin-top:-1px}
.progress i{display:block;height:100%;width:0;background:var(--accent)}

#article{padding-block:28px 96px;max-width:760px}
.ahead{display:grid;gap:14px;margin-bottom:24px}
.ahead .hero{aspect-ratio:21/9;border-radius:14px;max-width:100%}
.ahead h1{font-size:clamp(34px,5vw,54px);line-height:1.04}
.lede{font-size:19px;color:var(--muted);margin:0;max-width:56ch}
.facts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:8px 0 0;padding:16px 0;border-block:1px solid var(--line)}
@media (max-width:600px){.facts{grid-template-columns:1fr 1fr}}
.facts dt{font-family:var(--f-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.facts dd{margin:2px 0 0;font-size:15px}
.sec{padding-top:36px}
.sec h2{font-size:26px;margin-bottom:12px}
.sec p{margin:0 0 14px;max-width:64ch}
.prompt{color:var(--muted)}
.prompt em{color:var(--ink);font-style:normal;font-weight:500}
.prose{max-width:64ch}
.prose p{margin:0 0 14px}
.prose ul{margin:0 0 14px;padding-left:20px;display:grid;gap:6px}
.prose h3{font-size:19px;margin:22px 0 8px}
.prose h3:first-child{margin-top:0}
.pull{margin:22px 0;padding:4px 0 4px 18px;border-left:2px solid var(--accent);font-family:var(--f-display);font-weight:500;font-size:20px;line-height:1.35;text-wrap:pretty}
.pull cite{display:block;margin-top:8px;font-family:var(--f-mono);font-style:normal;font-size:12px;letter-spacing:.04em;color:var(--muted)}
.figx{margin:22px 0 8px;display:grid;gap:10px}
.figrow{display:grid;gap:12px;align-items:start}
.figrow.cols-1{grid-template-columns:minmax(0,1fr)}
.figrow.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.figrow.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.figrow.phones{max-width:620px}
.figrow.cols-2.phones{max-width:440px}
@media (max-width:520px){.figrow.cols-2:not(.phones){grid-template-columns:minmax(0,1fr)}}
.figitem{display:grid;gap:6px;min-width:0}
.figitem img{display:block;width:100%;height:auto;border-radius:10px;border:1px solid var(--line);background:var(--surface)}
.phones .figitem img{border-radius:18px}
.figlabel{font-family:var(--f-mono);font-size:11px;letter-spacing:.04em;color:var(--muted)}
.figx figcaption{font-size:13px;color:var(--muted);max-width:64ch}
.painchart{border:1px solid var(--line);border-radius:12px;background:var(--surface);padding:12px 14px;overflow-x:auto}
.pc-head{display:grid;grid-template-columns:minmax(0,2.2fr) minmax(0,1.6fr) minmax(0,1.2fr);gap:12px;font-family:var(--f-mono);font-size:11px;letter-spacing:.04em;color:var(--muted);padding-bottom:8px;border-bottom:1px solid var(--line)}
.pc-list{list-style:none;margin:0;padding:0}
.pc-row{display:grid;grid-template-columns:minmax(0,2.2fr) minmax(0,1fr) minmax(0,.6fr) minmax(0,1.2fr);gap:12px;align-items:center;padding:8px 0;border-bottom:1px solid var(--line);font-size:13px}
.pc-row:last-child{border-bottom:0}
.pc-who b{font-family:var(--f-mono);font-weight:500;margin-right:4px}
.pc-bar{height:6px;border-radius:3px;background:var(--line);overflow:hidden}
.pc-bar i{display:block;height:100%;background:var(--accent);border-radius:3px}
.pc-lv{font-variant-numeric:tabular-nums;color:var(--muted)}
.pc-g{font-size:12px}.pc-b{color:var(--muted)}.pc-p{color:var(--ink)}
@media (max-width:600px){.pc-head{display:none}.pc-row{grid-template-columns:minmax(0,1fr) minmax(0,1fr);row-gap:4px}.pc-who{grid-column:1/-1}}
.rv{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
@media (max-width:600px){.rv{grid-template-columns:minmax(0,1fr)}}
.rv-col{display:grid;gap:6px;min-width:0}
.rv-frame{border:1px solid var(--line);border-radius:12px;background:var(--surface);aspect-ratio:4/3;max-width:100%;padding:12px;position:relative;font-size:12px;overflow:hidden}
.rv-lin{margin:0;padding-left:18px;display:grid;gap:6px}
.rv-node{position:absolute;padding:3px 7px;border:1px solid var(--line);border-radius:999px;background:var(--bg);white-space:nowrap;font-size:11px}
.rv-node.n0{left:8%;top:12%}.rv-node.n1{right:8%;top:24%}.rv-node.n2{left:30%;top:44%;border-color:var(--accent);color:var(--accent)}.rv-node.n3{left:6%;bottom:14%}.rv-node.n4{right:6%;bottom:22%}
.rv-hyb{display:grid;grid-template-rows:1fr auto;gap:8px}
.rv-mini{position:relative;border:1px dashed var(--line);border-radius:8px}
.rv-dot{position:absolute;width:9px;height:9px;border-radius:50%;background:var(--line)}
.rv-dot.d0{left:18%;top:28%}.rv-dot.d1{right:22%;top:20%}.rv-dot.d2{left:46%;top:56%;background:var(--accent)}.rv-dot.d3{right:16%;bottom:18%}
.rv-next{border:1px solid var(--accent);border-radius:8px;padding:8px;background:var(--bg)}
.rv-next small{display:block;font-family:var(--f-mono);font-size:10px;color:var(--muted)}
.fig{margin:20px 0 6px;aspect-ratio:16/9;max-width:100%;border-radius:12px;border:1px dashed var(--line);display:grid;place-items:center;text-align:center;padding:12px;color:var(--muted);background:var(--surface)}
.anext{margin-top:56px;padding-top:24px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.anext .big{font-family:var(--f-display);font-size:24px;font-weight:650;display:inline-flex;gap:10px;align-items:center}
.anext .big:hover{color:var(--accent)}

/* Rail (pattern A) */
#rail{display:none}
.rail-item{display:flex;align-items:center;gap:10px;padding:8px;border-radius:12px;text-align:left;width:100%;border:1px solid transparent}
.rail-item .cover{width:44px;height:44px;border-radius:8px;flex:none}
.rail-item b{display:block;font-family:var(--f-display);font-weight:650;font-size:15px}
.rail-item small{display:block;color:var(--muted);font-size:12px;line-height:1.3}
.rail-item:hover{background:var(--surface)}
.rail-item[aria-current="page"]{background:var(--surface);border-color:var(--line)}
.rail-label{padding:4px 8px 8px}

body.in-study #overview{display:none}
body #study .shell{display:grid;grid-template-columns:220px minmax(0,1fr);gap:40px}
body #rail{display:block;position:sticky;top:calc(var(--hdr) + 20px);align-self:start;padding-top:20px}
body #rail .list{display:grid;gap:4px}
@media (max-width:860px){
  body.in-study{--rail-h:60px}
  body #study .shell{grid-template-columns:minmax(0,1fr);gap:0}
  body #rail{position:sticky;top:calc(env(safe-area-inset-top,0px) + var(--hdr));z-index:21;height:var(--rail-h);padding:0;margin-inline:-24px;padding-inline:24px;background:var(--bg);border-bottom:1px solid var(--line);overflow-x:auto;scrollbar-width:none}
  body #rail .rail-label{display:none}
  body #rail .list{display:flex;gap:6px;height:100%;align-items:center;width:max-content}
  body .rail-item{padding:5px 10px 5px 5px;width:auto}
  body .rail-item .cover{width:32px;height:32px;border-radius:6px}
  body .rail-item small{display:none}
}
@media (max-width:600px){body #rail{margin-inline:-16px;padding-inline:16px}}

/* Short windows (200% zoom, landscape phones): unpin the site header and drop the section tabs,
   but keep the project strip and back bar pinned so switching projects never costs the reading position */
@media (max-height:600px){
  .site{position:relative;top:auto}
  body #rail{top:calc(env(safe-area-inset-top,0px) + 12px)}
  .studybar{top:env(safe-area-inset-top,0px)}
  body .studybar{top:calc(env(safe-area-inset-top,0px) + var(--rail-h))}
  .toc{display:none}
}
@media (max-height:600px) and (max-width:860px){
  body #rail{top:env(safe-area-inset-top,0px)}
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce){
  :root{--dur:1ms}
  .card, #toast,   .card:hover{transform:none}
  .card.returned{animation:none}
}

/* Toast */
#toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translate(-50%,20px);opacity:0;pointer-events:none;z-index:60;display:flex;align-items:center;gap:12px;padding:10px 10px 10px 16px;border-radius:999px;background:var(--ink);color:var(--bg);font-size:14px;transition:opacity .25s,transform .25s var(--ease);max-width:calc(100vw - 32px)}
#toast.on{opacity:1;transform:translate(-50%,0);pointer-events:auto}
#toast button{padding:6px 12px;border-radius:999px;background:color-mix(in srgb,var(--bg) 18%,transparent);font-weight:500;white-space:nowrap}


.note{color:var(--muted);font-size:13px;margin:0}

[hidden]{display:none!important}
.loop{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;counter-reset:step}
@media (max-width:600px){.loop{grid-template-columns:minmax(0,1fr)}}
.loop li{display:grid;gap:6px;align-content:start;padding:14px;border:1px solid var(--line);border-radius:12px;background:var(--surface);font-size:14px;position:relative}
.loop li b{font-family:var(--f-display);font-weight:650;font-size:17px}
.loop li span:last-child{color:var(--muted)}
.loop li:not(:last-child)::after{content:"→";position:absolute;right:-11px;top:50%;transform:translateY(-50%);color:var(--muted);background:var(--bg);font-size:14px;line-height:1}
@media (max-width:600px){.loop li:not(:last-child)::after{content:"↓";right:auto;left:50%;top:auto;bottom:-11px;transform:translateX(-50%)}}
/* Production sections */
.block{margin-top:72px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.4fr);gap:32px;border-top:1px solid var(--line);padding-top:32px}
@media (max-width:760px){.block{grid-template-columns:1fr}}
.block h2{font-size:26px;margin-top:8px}
.xp li span:first-child{min-width:0}
.xp small{display:block;color:var(--muted);font-size:14px}
.contact-links{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.contact-links a{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--ink);text-decoration:none;min-height:44px}
.contact-links a:hover{border-color:var(--accent)}
.contact-links .mono{color:var(--muted);overflow-wrap:anywhere;text-align:right}
.site nav a{padding:6px 10px;border-radius:8px;font-size:14px;color:var(--muted);text-decoration:none}
.site nav a:hover{color:var(--ink);background:var(--surface)}
@media (max-width:480px){
  .brand{min-width:0}
  .brand b{white-space:normal;font-size:15px;line-height:1.15}
  .site nav{gap:0;flex:none}
  .site nav button,.site nav a{padding:6px 7px;font-size:13px}
}
/* Three-up figures become a swipeable row on phones so screen text stays readable */
@media (max-width:600px){
  .figrow.cols-3{grid-template-columns:none;grid-auto-flow:column;grid-auto-columns:72%;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:8px;max-width:100%}
  .figrow.cols-3 .figitem{scroll-snap-align:start}
  .figrow.cols-3.phones{grid-auto-columns:58%}
}
.figrow:focus-visible{outline:2px solid var(--accent);outline-offset:4px;border-radius:10px}
.noscript{margin:24px 0;padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:var(--surface)}
.foot{margin-top:72px;padding-top:20px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}
.credit{font-family:var(--f-mono);font-size:11px;letter-spacing:.02em;color:var(--muted)}
picture{display:contents}