/* Home page (/), version 2: AI for Cities Commons. Loaded after hub.css, on this page only (hub.css is shared with the frozen
   archives and stays untouched). Own classes start with hm- so they never meet a class of hub.css or hub.js.
   Theme "night to dawn" as on /declaration: the hero and the footer stay night, the entries, roles and materials sit on warm paper.
   The paper tokens below are read by scripts/checks/check-home.py for the contrast check. */

:root{
  --hm-paper:#F8F3E9;    /* warm paper (variant C of spec 05) */
  --hm-card:#FFFDF8;     /* card on paper */
  --hm-ink:#1C2752;      /* headings: ink, never pure black */
  --hm-text:#262C42;     /* body text on paper */
  --hm-muted:#5A6077;    /* secondary text, group labels */
  --hm-line:rgba(28,39,82,.08);
  --hm-shadow:0 1px 2px rgba(60,40,20,.04),0 12px 32px rgba(60,40,20,.06);
  --hm-link:#0A6A89;     /* links and cyan labels on paper */
  --hm-cta:#B0148E;      /* the call on paper: deep magenta, white text */
  --hm-wd-bg:#F3E6CC; --hm-wd-fg:#8C5300;
}

main{overflow-x:clip}

/* ---------- hero (night) ---------- */
.hm-hero{padding:clamp(32px,5vw,72px) 0 clamp(8px,2vw,24px)}
.hm-hero .hub-bg::after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 40% 46% at 78% 62%,rgba(255,181,71,.11),transparent 70%)}
.hm-hero-grid{display:grid;grid-template-columns:minmax(0,1fr) clamp(380px,32vw,480px);align-items:center;gap:clamp(24px,4vw,56px)}
.hm-copy{max-width:640px}
.hm-copy .h-display{margin-top:22px;max-width:none;font-size:clamp(34px,2.3vw + 21px,54px)}
.hm-copy .h-sub{font-size:clamp(19.5px,.6vw + 17px,26px);max-width:26em}
.hm-trust{margin-top:clamp(14px,1.6vw,22px);padding-top:16px;max-width:60ch;border-top:1px solid var(--line);font-size:14px;line-height:1.55;color:var(--faint)}
.hm-art{pointer-events:none}
.hm-art img{display:block;width:100%;height:auto;opacity:.92;filter:brightness(.94);
  -webkit-mask-image:radial-gradient(closest-side,#000 72%,transparent 100%);mask-image:radial-gradient(closest-side,#000 72%,transparent 100%)}
/* eyebrow: one line from 1100 px (it may run over the picture column), at most two lines on phones */
.hm-copy{position:relative;z-index:2}
@media screen and (min-width:1100px){.hm-copy .eyebrow{white-space:nowrap}}
@media screen and (max-width:760px){.hm-copy .eyebrow{font-size:11px;letter-spacing:.1em}}
@media screen and (max-width:960px){
  .hm-hero-grid{grid-template-columns:minmax(0,1fr);gap:8px}
  .hm-copy{max-width:none}
  .hm-art{justify-self:center;margin-top:20px}
  .hm-art img{width:auto;height:300px;max-width:100%}
}
@media screen and (max-width:760px){
  .hm-art img{height:220px}
}

/* ---------- night to dawn and back: layered paper hills ---------- */
.hm-edge{position:relative;overflow:hidden;pointer-events:none;height:clamp(84px,14vw,200px)}
.hm-edge svg{position:absolute;left:0;bottom:0;display:block;width:100%;height:100%}
.hm-edge-glow{position:absolute;left:0;right:0;top:0;bottom:0;background:radial-gradient(ellipse 46% 70% at 50% 100%,rgba(255,196,120,.30),rgba(255,196,120,.10) 45%,transparent 72%)}
/* dawn: paper with grain under the lower part, so the join runs into the next section without a seam */
.hm-edge--dawn{margin-bottom:-1px}
.hm-edge--dawn::before{content:"";position:absolute;inset:0;background:var(--hm-paper) url(declaration/paper-grain.webp) 0 0/192px 192px repeat;
  -webkit-mask-image:linear-gradient(180deg,transparent 50%,#000 78%);mask-image:linear-gradient(180deg,transparent 50%,#000 78%)}
.hm-edge--dawn svg{-webkit-mask-image:linear-gradient(180deg,#000 72%,transparent 100%);mask-image:linear-gradient(180deg,#000 72%,transparent 100%)}
.hm-edge--dusk{margin-top:-1px;background:var(--hm-paper) url(declaration/paper-grain.webp) 0 0/192px 192px repeat}
@media screen and (max-width:760px){.hm-edge{height:clamp(64px,20vw,96px)}}

/* ---------- paper ---------- */
.hm-paper{position:relative;isolation:isolate;background:var(--hm-paper) url(declaration/paper-grain.webp) 0 0/192px 192px repeat;color:var(--hm-text)}
@media screen{.hm-paper{color-scheme:light}}
.hm-wrap{padding-top:clamp(24px,3vw,48px);padding-bottom:clamp(48px,6vw,88px)}
.hm-paper a:focus-visible{outline:2px solid var(--hm-link);outline-offset:3px;border-radius:6px}

/* groups: air between groups is more than twice the air inside */
.hm-group + .hm-group{margin-top:clamp(56px,7vw,96px)}
.hm-glabel{margin-bottom:16px;font-size:12.5px;font-weight:700;letter-spacing:.18em;line-height:1.5;color:var(--hm-muted)}
.hm-cards{display:grid;gap:20px}
.hm-cards--2{grid-template-columns:repeat(2,minmax(0,1fr))}

.hm-card{--bar:#29F0FF;--deep:#0A6A89;position:relative;display:flex;gap:20px;padding:clamp(24px,2.4vw,32px);padding-top:clamp(26px,2.6vw,34px);
  background:var(--hm-card);border:1px solid var(--hm-line);border-radius:18px;box-shadow:var(--hm-shadow);overflow:hidden}
.hm-card::before{content:"";position:absolute;left:0;right:0;top:0;height:4px;background:var(--bar)}
.hm-cyan{--bar:#29F0FF;--deep:#0A6A89}
.hm-magenta{--bar:#FF2BD6;--deep:#B0148E}
.hm-amber{--bar:#FFB547;--deep:#8C5300}
.hm-green{--bar:#4ADE80;--deep:#2A6D47}
.hm-thumb{flex:none;display:block;width:96px;height:96px;border-radius:14px;object-fit:cover;background:#E9E3D5}
.hm-wide .hm-thumb{width:136px;height:136px;border-radius:16px}
.hm-thumb--mark{display:grid;place-items:center;padding:4px;background:radial-gradient(circle at 50% 50%,#1A1440,#0B1020 72%)}
.hm-rings{display:block;width:100%;height:100%}
.hm-body{min-width:0;flex:1;display:flex;flex-direction:column}
.hm-label{font-size:12px;font-weight:700;letter-spacing:.14em;line-height:1.55;color:var(--deep)}
.hm-title{margin-top:10px;font-size:clamp(20px,.6vw + 16px,25px);font-weight:750;line-height:1.2;letter-spacing:-.02em;color:var(--hm-ink)}
.hm-text{margin-top:10px;max-width:56ch;font-size:15.5px;line-height:1.6;color:var(--hm-text)}
.hm-links{display:flex;flex-wrap:wrap;align-items:center;gap:4px 22px;margin-top:auto;padding-top:20px}
.hm-main{display:inline-flex;align-items:center;gap:10px;min-height:44px;padding:0 20px;border-radius:999px;font-size:15px;font-weight:650;color:var(--hm-ink);text-decoration:none;
  box-shadow:inset 0 0 0 1.5px rgba(28,39,82,.45);transition:background .2s,color .2s,box-shadow .2s}
.hm-main:hover,.hm-card:hover .hm-main{background:var(--hm-ink);color:#fff;box-shadow:inset 0 0 0 1.5px var(--hm-ink)}
.hm-sec{display:inline-flex;align-items:center;min-height:44px;font-size:15px;font-weight:600;color:var(--hm-link);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:5px}
.hm-sec:hover{color:var(--hm-ink)}

/* roles */
.hm-roles{margin-top:clamp(56px,7vw,96px)}
.hm-h3{font-size:clamp(20px,.6vw + 16px,25px);font-weight:750;line-height:1.25;letter-spacing:-.02em;color:var(--hm-ink)}
.hm-chips{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 0;padding:0;list-style:none}
.hm-chips a{display:inline-flex;align-items:center;min-height:44px;padding:0 18px;border-radius:999px;background:var(--hm-card);box-shadow:inset 0 0 0 1px rgba(28,39,82,.22);
  font-size:15px;font-weight:600;color:var(--hm-ink);text-decoration:none;transition:background .2s,color .2s,box-shadow .2s}
.hm-chips a:hover{background:var(--hm-ink);color:#fff;box-shadow:inset 0 0 0 1px var(--hm-ink)}

/* materials */
.hm-materials{margin-top:clamp(72px,9vw,128px)}
.hm-eyebrow{font-size:12.5px;font-weight:700;letter-spacing:.18em;line-height:1.5;color:var(--hm-link)}
.hm-h2{margin-top:14px;max-width:22ch;font-size:var(--fs-h2);font-weight:800;line-height:1.1;letter-spacing:-.025em;color:var(--hm-ink)}
.hm-mgroup{margin-top:clamp(28px,3.4vw,44px);max-width:980px}
.hm-mgroup + .hm-mgroup{margin-top:clamp(24px,3vw,36px)}
.hm-mlabel{font-size:14px;font-weight:700;letter-spacing:.02em;color:var(--hm-muted)}
.hm-files{margin:12px 0 0;padding:0;list-style:none;background:var(--hm-card);border:1px solid var(--hm-line);border-radius:16px;box-shadow:var(--hm-shadow)}
.hm-files li{display:grid;grid-template-columns:minmax(0,1fr) auto 64px auto auto;align-items:center;gap:4px 20px;padding:10px 22px;border-top:1px solid var(--hm-line)}
.hm-files li:first-child{border-top:0}
.hm-fname{font-size:16px;font-weight:650;line-height:1.4;color:var(--hm-ink)}
.hm-fmeta,.hm-fsize{font-size:14px;line-height:1.4;color:var(--hm-muted);font-variant-numeric:tabular-nums}
.hm-fsize{text-align:right}
.hm-wd{display:inline-block;margin-left:8px;padding:2px 9px;border-radius:999px;background:var(--hm-wd-bg);font-style:normal;font-size:12px;font-weight:700;letter-spacing:.04em;color:var(--hm-wd-fg);vertical-align:1px;white-space:nowrap}
.hm-dl{display:inline-flex;align-items:center;min-height:44px;font-size:15px;font-weight:650;color:var(--hm-link);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:5px}
.hm-dl:hover{color:var(--hm-ink)}
.hm-sr{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
@media screen and (max-width:700px){
  .hm-files li{grid-template-columns:auto auto minmax(0,1fr);grid-template-areas:"n n n" "m m s" "d x x";gap:4px 18px;padding:14px 18px}
  .hm-fname{grid-area:n}
  .hm-fmeta{grid-area:m}
  .hm-fsize{grid-area:s}
  .hm-dl{grid-area:d;justify-self:start}
  .hm-share{grid-area:x;justify-self:start}
}

/* Share button of a material row: a magenta pill, white text (the same pair as the call button) */
.hm-share{display:inline-flex;align-items:center;gap:8px;min-height:40px;padding:0 16px 0 14px;border-radius:999px;background:var(--hm-cta);color:#fff;font-size:14.5px;font-weight:700;text-decoration:none;white-space:nowrap;
  box-shadow:0 6px 16px -10px rgba(176,20,142,.7);transition:background .2s}
.hm-share:hover{background:#930F76;color:#fff}
.hm-share-ic{flex:none;display:block}
.hm-paper a.hm-share:focus-visible{outline:2px solid var(--hm-ink);outline-offset:3px}

/* closing */
.hm-close{max-width:760px;margin-top:clamp(72px,9vw,128px);padding-top:clamp(28px,3.6vw,44px);border-top:1px solid rgba(28,39,82,.14)}
.hm-close-line{max-width:52ch;font-size:clamp(17px,.5vw + 14.5px,21px);line-height:1.55;color:var(--hm-ink)}
.hm-close-act{margin-top:clamp(20px,2.4vw,28px)}
.hm-cta{display:inline-flex;align-items:center;gap:12px;min-height:52px;padding:0 28px;border-radius:999px;background:var(--hm-cta);color:#fff;font-size:16px;font-weight:700;text-decoration:none;
  box-shadow:0 10px 28px -12px rgba(176,20,142,.6);transition:background .2s,transform .2s}
.hm-cta:hover{background:#930F76;transform:translateY(-1px)}

/* ---------- footer: night, solid, joined to the dusk hills ---------- */
.site-foot{margin-top:0;border-top:0;background:#0B1020}

/* ---------- phones ---------- */
@media screen and (max-width:900px){
  .hm-cards--2{grid-template-columns:minmax(0,1fr)}
}
@media screen and (max-width:560px){
  .hm-card{flex-direction:column;gap:16px}
  .hm-thumb,.hm-wide .hm-thumb{width:72px;height:72px;border-radius:12px}
  .hm-links{flex-direction:column;align-items:flex-start}
  .hm-main{width:100%;justify-content:space-between}
  .hm-cta{width:100%;justify-content:space-between}
}

@media (prefers-reduced-motion:reduce){
  .hm-main,.hm-chips a,.hm-cta{transition:none}
  .hm-cta:hover{transform:none}
}

/* ---------- Share dialog (assets/share.js) and share cards (/share/<slug>) ---------- */
.sh-dlg{width:min(560px,calc(100vw - 32px));max-height:calc(100vh - 32px);max-height:calc(100dvh - 32px);margin:auto;padding:0;border:1px solid var(--hm-line);border-radius:18px;
  background:var(--hm-card);color:var(--hm-text);color-scheme:light;box-shadow:0 24px 64px -16px rgba(11,16,32,.5);overflow:auto}
.sh-dlg::backdrop{background:rgba(11,16,32,.62)}
.sh-in{padding:clamp(18px,3vw,26px)}
.sh-hd{display:flex;align-items:center;justify-content:space-between;gap:12px}
.sh-hd h2{font-size:clamp(20px,.6vw + 16px,24px);font-weight:750;line-height:1.2;letter-spacing:-.02em;color:var(--hm-ink)}
.sh-x{flex:none;display:grid;place-items:center;width:44px;height:44px;margin:-8px -10px -8px 0;border:0;border-radius:50%;background:none;color:var(--hm-ink);cursor:pointer}
.sh-x:hover{background:rgba(28,39,82,.08)}
.sh-pv{display:block;width:100%;height:auto;aspect-ratio:1200/630;margin-top:14px;border-radius:12px;background:#E9E3D5;object-fit:cover;box-shadow:inset 0 0 0 1px var(--hm-line)}
.sh-cap{display:block;margin-top:16px;font-size:14px;font-weight:700;color:var(--hm-ink)}
.sh-dlg textarea{display:block;width:100%;min-height:9.5em;margin-top:8px;padding:12px 14px;border:1.5px solid rgba(28,39,82,.45);border-radius:12px;background:#fff;color:var(--hm-text);font:inherit;font-size:15px;line-height:1.55;resize:vertical}
.sh-dlg textarea:focus-visible,.sh-dlg button:focus-visible{outline:2px solid var(--hm-link);outline-offset:2px}
.sh-btns{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.sh-b{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border:0;border-radius:999px;background:var(--hm-card);box-shadow:inset 0 0 0 1.5px rgba(28,39,82,.45);color:var(--hm-ink);font:inherit;font-size:15px;font-weight:650;cursor:pointer;transition:background .2s,color .2s}
.sh-b:hover{background:var(--hm-ink);color:#fff}
.sh-b1{background:var(--hm-ink);color:#fff;box-shadow:none}
.sh-b1:hover{background:#0F1636}
.sh-b[hidden]{display:none}
.sh-small{margin-top:14px;font-size:13.5px;line-height:1.5;color:var(--hm-muted)}
.sh-st{min-height:1.5em;margin-top:8px;font-size:14px;line-height:1.5;font-weight:600;color:var(--hm-link)}
@media screen and (prefers-reduced-motion:no-preference){
  .sh-dlg[open]{animation:sh-in .22s ease-out}
  @keyframes sh-in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
}
@media screen and (max-width:560px){
  .sh-dlg{width:calc(100vw - 32px)}
  .sh-btns{flex-direction:column}
  .sh-b{width:100%}
}
@media (prefers-reduced-motion:reduce){.sh-b,.hm-share{transition:none}}

/* share card page */
.sh-paper .hm-wrap{padding-top:clamp(28px,4vw,56px)}
.sh-card{max-width:820px}
.sh-h1{margin-top:14px;font-size:clamp(30px,2vw + 20px,46px);font-weight:800;line-height:1.1;letter-spacing:-.025em;color:var(--hm-ink)}
.sh-img{display:block;width:100%;height:auto;aspect-ratio:1200/630;margin-top:clamp(20px,2.6vw,30px);border-radius:16px;border:1px solid var(--hm-line);box-shadow:var(--hm-shadow);background:#E9E3D5}
.sh-line{margin-top:clamp(16px,2vw,22px);max-width:56ch;font-size:clamp(17px,.5vw + 14.5px,21px);line-height:1.5;color:var(--hm-ink)}
.sh-act{margin-top:clamp(18px,2.2vw,26px)}
.sh-block{margin-top:clamp(32px,4vw,48px)}
.hm-files.sh-files li{grid-template-columns:minmax(0,1fr) auto auto}
.sh-fname{font-size:16px;font-weight:650;line-height:1.4;color:var(--hm-ink)}
.sh-fmeta{font-size:14px;line-height:1.4;color:var(--hm-muted);font-variant-numeric:tabular-nums}
.sh-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}
.sh-note{margin-top:12px;font-size:14px;line-height:1.5;color:var(--hm-muted)}
@media screen and (max-width:700px){
  .hm-files.sh-files li{grid-template-columns:minmax(0,1fr);grid-template-areas:none}
  .sh-links{flex-direction:column}
  .sh-links .hm-main{width:100%;justify-content:space-between}
  .sh-card .hm-cta{width:100%;justify-content:space-between}
}