/* ==========================================================================
   ResearchDen - design system
   Editorial / academic. Light + dark. Responsive.
   Tokens mirror the critical CSS inlined in each page's <head>.
   ========================================================================== */

/* ---------- Tokens : LIGHT (default) ---------------------------------- */
:root{
  --ink:#0E1B2C;          /* primary text / strong ink            */
  --ink-2:#1B2A40;
  --ink-soft:#2D3D55;
  --paper:#F7F4EE;        /* page background - warm paper          */
  --paper-2:#EFEADF;      /* raised surfaces / cards               */
  --paper-3:#E8E2D4;
  --line:#D8CFB7;         /* hard rules                            */
  --line-soft:#E3DBC9;    /* soft hairlines                        */
  --muted:#6B7587;
  --muted-ink:#5C6677;

  --accent:oklch(0.50 0.11 250);        /* scholarly indigo-blue   */
  --accent-2:oklch(0.45 0.12 250);
  --accent-soft:oklch(0.93 0.03 250);
  --accent-ink:#ffffff;                 /* text on accent          */
  --gold:oklch(0.70 0.10 80);

  --serif:"Newsreader",ui-serif,Georgia,serif;
  --sans:"Inter",ui-sans-serif,system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,monospace;

  --nav-h:68px;
  --container:1180px;
  --radius:14px;
  --shadow:0 1px 2px rgba(14,27,44,.04), 0 8px 30px -12px rgba(14,27,44,.12);
  color-scheme:light;
}

/* ---------- Tokens : DARK --------------------------------------------- */
[data-theme="dark"]{
  --ink:#ECE7DA;
  --ink-2:#D8D2C4;
  --ink-soft:#B8B2A4;
  --paper:#10141B;
  --paper-2:#161C26;
  --paper-3:#1E2632;
  --line:#2A3340;
  --line-soft:#222A35;
  --muted:#8A93A2;
  --muted-ink:#9AA3B2;

  --accent:oklch(0.74 0.10 245);
  --accent-2:oklch(0.80 0.09 245);
  --accent-soft:oklch(0.30 0.06 250);
  --accent-ink:#0B0F15;
  --gold:oklch(0.78 0.09 80);

  --shadow:0 1px 2px rgba(0,0,0,.3), 0 12px 34px -14px rgba(0,0,0,.6);
  color-scheme:dark;
}

/* ---------- Base ------------------------------------------------------ */
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 16px)}
body{
  font-family:var(--sans);
  background:var(--paper);
  color:var(--ink);
  font-size:16px;line-height:1.65;
  -webkit-font-smoothing:antialiased;
  transition:background .35s ease, color .35s ease;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit}
.skip{position:absolute;left:-9999px;top:0}
.skip:focus{left:16px;top:12px;z-index:200;background:var(--ink);color:var(--paper);padding:10px 16px;border-radius:8px}
.wrap{max-width:var(--container);margin:0 auto;padding:0 32px}
::selection{background:var(--accent-soft);color:var(--ink)}

/* hide content visually but keep for SR */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- Typography ------------------------------------------------ */
.display{
  font-family:var(--serif);
  font-weight:500;
  letter-spacing:-.015em;
  line-height:1.08;
  font-size:clamp(2rem,1.2rem + 3.2vw,3.4rem);
  margin:0;
}
.display em{font-style:italic;font-weight:400;color:var(--accent)}
h1,h2,h3,h4{color:var(--ink)}
p{margin:0 0 1rem}

.sec-index{
  display:flex;align-items:center;gap:12px;
  font-family:var(--mono);font-size:11px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--muted-ink);margin-bottom:18px;
}
.sec-index .num{color:var(--accent);font-weight:500}
.sec-index::after{content:"";flex:1;height:1px;background:var(--line-soft);margin-left:6px}

.eyebrow{
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted-ink);
}

/* ---------- Sections -------------------------------------------------- */
section{padding:84px 0;border-top:1px solid var(--line-soft)}
section:first-of-type{border-top:0}
.sec-head{max-width:760px;margin-bottom:44px}
.sec-head p{color:var(--ink-soft);font-size:17px;margin-top:18px;margin-bottom:0}
.page-head{padding:64px 0 0}
.page-head .lede{font-size:19px;color:var(--ink-soft);max-width:680px;margin-top:20px}

/* ---------- Nav ------------------------------------------------------- */
.nav{
  position:sticky;top:0;z-index:50;height:var(--nav-h);
  backdrop-filter:saturate(140%) blur(10px);
  -webkit-backdrop-filter:saturate(140%) blur(10px);
  background:color-mix(in oklab,var(--paper) 84%,transparent);
  border-bottom:1px solid var(--line-soft);
}
.nav-inner{display:flex;align-items:center;gap:24px;height:100%}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.brand-mark{
  width:34px;height:34px;border:1.5px solid var(--ink);
  display:grid;place-items:center;font-family:var(--serif);
  font-weight:500;font-size:17px;background:transparent;flex-shrink:0;border-radius:8px;
}
.brand-mark span{transform:translateY(-1px);display:block}
.brand-name{font-family:var(--serif);font-weight:500;font-size:19px;letter-spacing:-.01em;line-height:1}
.brand-name em{font-style:italic;font-weight:400;color:var(--muted-ink)}
.brand-org{font-family:var(--mono);font-size:9.5px;letter-spacing:.09em;color:var(--muted-ink);text-transform:uppercase;margin-top:3px;line-height:1}
.nav-links{display:flex;gap:6px;margin-left:auto;font-size:14px}
.nav-links a{
  text-decoration:none;color:var(--ink-soft);
  padding:7px 12px;border-radius:8px;line-height:1;
  transition:background .2s,color .2s;
}
.nav-links a:hover{background:var(--paper-2);color:var(--ink)}
.nav-links a.active{color:var(--accent);font-weight:500}
.nav-actions{display:flex;align-items:center;gap:10px}
.nav-cta{
  text-decoration:none;font-size:13.5px;font-weight:500;
  background:var(--ink);color:var(--paper);padding:9px 16px;border-radius:999px;
  transition:opacity .2s;white-space:nowrap;
}
.nav-cta:hover{opacity:.88}

/* theme toggle */
.theme-toggle{
  width:40px;height:40px;border:1px solid var(--line);border-radius:10px;
  background:var(--paper-2);color:var(--ink);cursor:pointer;
  display:grid;place-items:center;flex-shrink:0;transition:background .2s,border-color .2s;
}
.theme-toggle:hover{border-color:var(--accent)}
.theme-toggle svg{width:18px;height:18px}
.theme-toggle .moon{display:none}
[data-theme="dark"] .theme-toggle .sun{display:none}
[data-theme="dark"] .theme-toggle .moon{display:block}

.menu-toggle{
  display:none;background:var(--paper-2);border:1px solid var(--line);
  width:40px;height:40px;align-items:center;justify-content:center;
  cursor:pointer;border-radius:10px;color:var(--ink);
}
.menu-toggle svg{width:20px;height:20px}
.menu-toggle .x{display:none}

/* mobile menu */
.mobile-menu{
  display:none;position:fixed;inset:var(--nav-h) 0 auto 0;z-index:49;
  background:var(--paper);border-bottom:1px solid var(--line);
  padding:14px 32px 24px;flex-direction:column;gap:2px;
  max-height:calc(100dvh - var(--nav-h));overflow-y:auto;
}
.mobile-menu[data-open="true"]{display:flex}
.mobile-menu a{
  text-decoration:none;color:var(--ink);font-size:17px;
  padding:14px 4px;border-bottom:1px solid var(--line-soft);
  display:flex;justify-content:space-between;align-items:center;
}
.mobile-menu a.active{color:var(--accent)}
.mobile-menu .arr{color:var(--muted-ink)}
.mobile-menu .m-cta{
  margin-top:16px;background:var(--ink);color:var(--paper);
  justify-content:center;border-radius:999px;border:0;font-weight:500;
}

@media(max-width:980px){
  .nav-links{display:none}
  .nav-cta{display:none}
  .menu-toggle{display:inline-flex}
  .nav-actions{margin-left:auto}   /* push theme toggle + hamburger to the right */
}
@media(max-width:640px){.wrap{padding:0 20px}.mobile-menu{padding:14px 20px 24px}}

/* ---------- Buttons / pills ------------------------------------------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;text-decoration:none;
  font-size:14.5px;font-weight:500;padding:12px 20px;border-radius:999px;
  border:1px solid transparent;cursor:pointer;line-height:1;transition:all .2s;
}
.btn .arr{transition:transform .2s}
.btn:hover .arr{transform:translateX(3px)}
.btn-primary{background:var(--ink);color:var(--paper)}
.btn-primary:hover{opacity:.9}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-accent{background:var(--accent);color:var(--accent-ink)}
.btn-accent:hover{filter:brightness(1.05)}

.pill{
  display:inline-flex;align-items:center;gap:8px;text-decoration:none;
  font-family:var(--mono);font-size:12px;letter-spacing:.04em;
  color:var(--ink-soft);border:1px solid var(--line);
  padding:6px 13px;border-radius:999px;background:var(--paper-2);
}
.pill .dot,.dot{width:7px;height:7px;border-radius:50%;background:var(--accent);display:inline-block;flex-shrink:0}

.badge{
  display:inline-block;font-family:var(--mono);font-size:11px;letter-spacing:.04em;
  padding:5px 10px;border-radius:7px;border:1px solid var(--line);
  color:var(--ink-soft);background:var(--paper-2);white-space:nowrap;
}
.badge.is-accent{background:var(--accent-soft);border-color:transparent;color:var(--accent-2)}
[data-theme="dark"] .badge.is-accent{color:var(--accent)}
.badge.is-gold{border-color:color-mix(in oklab,var(--gold) 50%,transparent);color:var(--gold);background:transparent}

/* ---------- Hero ------------------------------------------------------ */
.hero{padding:72px 0 84px;border-top:0}
.hero-copy{max-width:840px;margin:0 auto;text-align:center}
.hero-copy .hero-meta{justify-content:center}
.hero-copy .lede{margin-left:auto;margin-right:auto}
.hero-copy .hero-ctas{justify-content:center}
.hero-copy .badges{justify-content:center}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:64px;align-items:center}
.hero-meta{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;
  color:var(--muted-ink);text-transform:uppercase;margin-bottom:24px;
}
.hero .display{margin-bottom:0}
.lede{font-size:19px;line-height:1.6;color:var(--ink-soft);margin:22px 0 28px;max-width:560px}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap}
.hero-trust{margin-top:18px;font-size:13px;color:var(--muted-ink)}
.badges{display:flex;flex-wrap:wrap;gap:8px;margin-top:30px}

/* hero figure card */
.hero-visual{
  position:relative;border:1px solid var(--line);border-radius:var(--radius);
  background:var(--paper-2);padding:22px;box-shadow:var(--shadow);color:var(--ink-soft);
}
.hv-stamp{display:flex;justify-content:space-between;font-family:var(--mono);font-size:10px;letter-spacing:.08em;color:var(--muted-ink);margin-bottom:6px}
.hero-visual svg{width:100%;height:auto;color:var(--ink-soft)}
.net-node{fill:var(--accent);opacity:.55}
.net-node.hi{opacity:.9}
.net-node.gold{fill:var(--gold);opacity:1}
.net-line{fill:none;stroke:var(--accent);stroke-width:.8;opacity:.3}
.net-line.hi{opacity:.6;stroke-width:1.1}
.hv-foot{display:flex;justify-content:space-between;gap:16px;margin-top:8px;border-top:1px solid var(--line-soft);padding-top:12px}
.hv-title{font-size:13px;color:var(--ink-soft);max-width:240px;line-height:1.45}
.hv-foot span:last-child{font-family:var(--serif);font-size:13px;text-align:right;color:var(--muted-ink)}

@media(max-width:920px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-visual{order:-1;max-width:480px}
}

/* ---------- Stats ----------------------------------------------------- */
.kpi{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;margin-top:34px}
.kpi > div{border-left:2px solid var(--accent);padding-left:16px}
.kpi .v{font-family:var(--serif);font-size:clamp(1.8rem,1.2rem+1.6vw,2.6rem);line-height:1;color:var(--ink)}
.kpi .l{font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted-ink);margin-top:8px}
@media(max-width:680px){.kpi{grid-template-columns:repeat(2,1fr);gap:22px}}

/* ---------- Cards grids ----------------------------------------------- */
.cards{display:grid;gap:18px}
.cards.cols-2{grid-template-columns:repeat(2,1fr)}
.cards.cols-3{grid-template-columns:repeat(3,1fr)}
.cards.cols-4{grid-template-columns:repeat(4,1fr)}
.card{
  background:var(--paper-2);border:1px solid var(--line-soft);
  border-radius:var(--radius);padding:24px;transition:transform .2s,border-color .2s,box-shadow .2s;
}
.card:hover{transform:translateY(-3px);border-color:var(--line);box-shadow:var(--shadow)}
.card .num{font-family:var(--mono);font-size:12px;color:var(--accent);margin-bottom:14px}
.card h3{font-family:var(--serif);font-weight:500;font-size:20px;margin:0 0 8px}
.card p{color:var(--ink-soft);font-size:14.5px;margin:0}
.card .ico{width:26px;height:26px;color:var(--accent);margin-bottom:14px}
@media(max-width:900px){.cards.cols-3,.cards.cols-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.cards.cols-2,.cards.cols-3,.cards.cols-4{grid-template-columns:1fr}}

/* ---------- Research areas (tag cloud style) -------------------------- */
.areas{display:flex;flex-wrap:wrap;gap:10px}
.areas span,.areas a{
  font-size:14px;padding:9px 15px;border:1px solid var(--line);
  border-radius:999px;color:var(--ink-soft);background:var(--paper-2);
  text-decoration:none;transition:all .2s;
}
.areas a:hover{border-color:var(--accent);color:var(--accent)}

/* ---------- News / blog list ------------------------------------------ */
.news-list{display:flex;flex-direction:column}
.news-item{
  display:grid;grid-template-columns:160px 1fr auto;gap:24px;align-items:baseline;
  padding:22px 0;border-bottom:1px solid var(--line-soft);text-decoration:none;color:inherit;
  transition:padding .2s;
}
.news-item:hover{padding-left:8px}
.news-date{font-family:var(--mono);font-size:12px;letter-spacing:.04em;color:var(--muted-ink);text-transform:uppercase}
.news-item h3{font-family:var(--serif);font-weight:500;font-size:19px;margin:0 0 4px}
.news-item p{font-size:14.5px;color:var(--ink-soft);margin:0}
.news-item .arr{color:var(--muted-ink);transition:transform .2s,color .2s}
.news-item:hover .arr{transform:translateX(4px);color:var(--accent)}
@media(max-width:640px){.news-item{grid-template-columns:1fr;gap:6px}.news-item .arr{display:none}}

/* blog cards */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.post-card{
  display:flex;flex-direction:column;background:var(--paper-2);
  border:1px solid var(--line-soft);border-radius:var(--radius);overflow:hidden;
  text-decoration:none;color:inherit;transition:transform .2s,box-shadow .2s,border-color .2s;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line)}
.post-card .cover{aspect-ratio:16/9;background:linear-gradient(135deg,var(--accent-soft),var(--paper-3));position:relative}
.post-card .cover .tag{position:absolute;left:14px;top:14px}
.post-card .body{padding:20px;display:flex;flex-direction:column;flex:1}
.post-card .meta{font-family:var(--mono);font-size:11px;letter-spacing:.05em;color:var(--muted-ink);text-transform:uppercase;margin-bottom:10px}
.post-card h3{font-family:var(--serif);font-weight:500;font-size:20px;margin:0 0 8px;line-height:1.25}
.post-card p{font-size:14px;color:var(--ink-soft);margin:0 0 16px;flex:1}
.post-card .byline{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted-ink);margin-top:auto}
.post-card .avatar{width:26px;height:26px;border-radius:50%;background:var(--accent-soft);border:1px solid var(--line-soft)}
@media(max-width:900px){.post-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.post-grid{grid-template-columns:1fr}}

/* ---------- Publications ---------------------------------------------- */
.filter-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:32px}
.filter-tabs button{
  font-family:var(--mono);font-size:12px;letter-spacing:.04em;text-transform:uppercase;
  padding:8px 15px;border:1px solid var(--line);border-radius:999px;
  background:transparent;color:var(--ink-soft);cursor:pointer;transition:all .2s;
}
.filter-tabs button:hover{border-color:var(--accent);color:var(--accent)}
.filter-tabs button.active{background:var(--ink);color:var(--paper);border-color:var(--ink)}

.pub-list{display:flex;flex-direction:column;gap:0}
.pub{
  display:grid;grid-template-columns:auto 1fr;gap:22px;
  padding:26px 0;border-bottom:1px solid var(--line-soft);
}
.pub-thumb{
  width:120px;height:90px;border:1px solid var(--line);border-radius:10px;
  background:linear-gradient(135deg,var(--paper-3),var(--paper-2));
  display:grid;place-items:center;font-family:var(--mono);font-size:10px;
  color:var(--muted-ink);text-align:center;flex-shrink:0;overflow:hidden;
}
.pub-thumb img{width:100%;height:100%;object-fit:cover}
.pub-venue{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:8px}
.pub h3{font-family:var(--serif);font-weight:500;font-size:19px;margin:0 0 6px;line-height:1.3}
.pub .authors{font-size:14px;color:var(--ink-soft);margin:0 0 4px}
.pub .authors .me{color:var(--accent);font-weight:500}
.pub .venue-line{font-size:13.5px;color:var(--muted-ink);font-style:italic;margin:0 0 14px}
.pub-links{display:flex;flex-wrap:wrap;gap:8px}
.pub-links a,.pub-links button{
  display:inline-flex;align-items:center;gap:6px;font-family:var(--mono);
  font-size:11.5px;letter-spacing:.03em;text-transform:uppercase;
  padding:6px 12px;border:1px solid var(--line);border-radius:8px;
  color:var(--ink-soft);background:var(--paper-2);text-decoration:none;cursor:pointer;transition:all .2s;
}
.pub-links a:hover,.pub-links button:hover{border-color:var(--accent);color:var(--accent)}
.pub-links svg{width:13px;height:13px}
@media(max-width:640px){
  .pub{grid-template-columns:auto 1fr;gap:16px}
  .pub-thumb{width:84px;height:64px;font-size:9px}
}
@media(max-width:420px){
  .pub-thumb{width:64px;height:52px}
}

/* ---------- Team ------------------------------------------------------ */
.team-group{margin-bottom:56px}
.team-group-head{display:flex;align-items:baseline;gap:14px;margin-bottom:24px}
.team-group-head h2{font-family:var(--serif);font-weight:500;font-size:24px;margin:0}
.team-group-head .count{font-family:var(--mono);font-size:12px;color:var(--muted-ink)}
.team-group-head::after{content:"";flex:1;height:1px;background:var(--line-soft)}
.team-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.person{
  background:var(--paper-2);border:1px solid var(--line-soft);
  border-radius:var(--radius);padding:22px;text-align:center;
  transition:transform .2s,box-shadow .2s,border-color .2s;
}
.person:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line)}
.person .photo{
  width:96px;height:96px;border-radius:50%;margin:0 auto 16px;
  object-fit:cover;border:2px solid var(--paper-3);background:var(--accent-soft);
  display:grid;place-items:center;font-family:var(--serif);font-size:30px;color:var(--accent-2);
}
.person h3{font-family:var(--serif);font-weight:500;font-size:18px;margin:0 0 3px}
.person .affil{font-size:13px;color:var(--ink-soft);margin:0 0 10px;line-height:1.4}
.person .p-areas{display:flex;flex-wrap:wrap;gap:5px;justify-content:center;margin-bottom:16px}
.person .p-areas span{font-family:var(--mono);font-size:10px;letter-spacing:.03em;padding:3px 8px;border-radius:6px;background:var(--paper-3);color:var(--muted-ink)}
.person .socials{display:flex;justify-content:center;gap:8px}
.person .socials a{
  width:32px;height:32px;border:1px solid var(--line-soft);border-radius:8px;
  display:grid;place-items:center;color:var(--ink-soft);transition:all .2s;
}
.person .socials a:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.person .socials svg{width:15px;height:15px}
@media(max-width:1000px){.team-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:720px){.team-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:440px){.team-grid{grid-template-columns:1fr}}

/* ---------- Resources ------------------------------------------------- */
.res-table{width:100%;border-collapse:collapse;font-size:14.5px}
.res-table thead th{
  text-align:left;font-family:var(--mono);font-size:11px;letter-spacing:.06em;
  text-transform:uppercase;color:var(--muted-ink);font-weight:500;
  padding:0 16px 12px;border-bottom:1px solid var(--line);
}
.res-table tbody td{padding:16px;border-bottom:1px solid var(--line-soft);vertical-align:top}
.res-table tbody tr{transition:background .15s}
.res-table tbody tr:hover{background:var(--paper-2)}
.res-table .name{font-weight:500;color:var(--ink)}
.res-table .deadline{font-family:var(--mono);font-size:13px;color:var(--accent)}
.res-table a.ext{color:var(--accent);text-decoration:none;font-family:var(--mono);font-size:13px;white-space:nowrap}
.res-table a.ext:hover{text-decoration:underline}
.res-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
@media(max-width:640px){.res-table{min-width:560px}}

.res-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.res-card{
  display:flex;flex-direction:column;gap:8px;background:var(--paper-2);
  border:1px solid var(--line-soft);border-radius:var(--radius);padding:22px;
  text-decoration:none;color:inherit;transition:transform .2s,box-shadow .2s,border-color .2s;
}
.res-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--line)}
.res-card .ico{width:24px;height:24px;color:var(--accent)}
.res-card h3{font-family:var(--serif);font-weight:500;font-size:18px;margin:0}
.res-card p{font-size:14px;color:var(--ink-soft);margin:0;flex:1}
.res-card .go{font-family:var(--mono);font-size:11px;letter-spacing:.05em;text-transform:uppercase;color:var(--accent);margin-top:6px}
@media(max-width:900px){.res-cards{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.res-cards{grid-template-columns:1fr}}

/* ---------- Article (blog post) --------------------------------------- */
.article{max-width:720px;margin:0 auto}
.article .a-meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;font-family:var(--mono);font-size:12px;color:var(--muted-ink);text-transform:uppercase;letter-spacing:.05em;margin-bottom:18px}
.article h1{font-family:var(--serif);font-weight:500;font-size:clamp(2rem,1.4rem+2vw,2.8rem);line-height:1.1;letter-spacing:-.01em;margin:0 0 20px}
.article .a-byline{display:flex;align-items:center;gap:12px;padding:18px 0;border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);margin-bottom:36px}
.article .a-byline .avatar{width:42px;height:42px;border-radius:50%;background:var(--accent-soft);border:1px solid var(--line-soft)}
.article .a-byline .who{font-weight:500}
.article .a-byline .role{font-size:13px;color:var(--muted-ink)}
.prose{font-size:17.5px;line-height:1.8;color:var(--ink-2)}
.prose h2{font-family:var(--serif);font-weight:500;font-size:26px;margin:40px 0 14px}
.prose h3{font-family:var(--serif);font-weight:500;font-size:21px;margin:32px 0 10px}
.prose p{margin:0 0 22px}
.prose a{color:var(--accent);text-decoration:underline;text-underline-offset:2px}
.prose ul,.prose ol{padding-left:22px;margin:0 0 22px}
.prose li{margin-bottom:8px}
.prose blockquote{margin:28px 0;padding:6px 22px;border-left:3px solid var(--accent);color:var(--ink-soft);font-style:italic;font-family:var(--serif);font-size:20px}
.prose code{font-family:var(--mono);font-size:.86em;background:var(--paper-2);padding:2px 6px;border-radius:6px;border:1px solid var(--line-soft)}
.prose pre{background:var(--paper-2);border:1px solid var(--line-soft);border-radius:10px;padding:18px;overflow-x:auto;margin:0 0 22px}
.prose pre code{background:none;border:0;padding:0}
.prose img{border-radius:10px;border:1px solid var(--line-soft);margin:22px 0}
.prose hr{border:0;border-top:1px solid var(--line-soft);margin:36px 0}

/* ---------- CTA strip ------------------------------------------------- */
.strip{background:var(--ink);color:var(--paper);border-radius:var(--radius);padding:56px;position:relative;overflow:hidden}
[data-theme="dark"] .strip{background:var(--paper-2);border:1px solid var(--line)}
.strip-grid{display:grid;grid-template-columns:1.4fr .9fr;gap:48px;align-items:center;position:relative;z-index:1}
.strip .sec-index,.strip .sec-index .num{color:color-mix(in oklab,var(--paper) 60%,transparent)}
[data-theme="dark"] .strip .sec-index{color:var(--muted-ink)}
.strip .sec-index::after{background:color-mix(in oklab,var(--paper) 25%,transparent)}
.strip h2{font-family:var(--serif);font-weight:500;font-size:clamp(1.7rem,1.2rem+1.6vw,2.4rem);line-height:1.1;margin:0 0 14px;color:var(--paper)}
[data-theme="dark"] .strip h2{color:var(--ink)}
.strip h2 em{font-style:italic;color:color-mix(in oklab,var(--paper) 72%,transparent)}
[data-theme="dark"] .strip h2 em{color:var(--accent)}
.strip p{color:color-mix(in oklab,var(--paper) 80%,transparent);margin:0 0 24px;max-width:460px}
[data-theme="dark"] .strip p{color:var(--ink-soft)}
.strip .btn-primary{background:var(--paper);color:var(--ink)}
[data-theme="dark"] .strip .btn-primary{background:var(--accent);color:var(--accent-ink)}
.strip .btn-ghost{color:var(--paper);border-color:color-mix(in oklab,var(--paper) 35%,transparent)}
[data-theme="dark"] .strip .btn-ghost{color:var(--ink);border-color:var(--line)}
.meta-card{
  border:1px solid color-mix(in oklab,var(--paper) 25%,transparent);border-radius:12px;
  padding:22px;font-family:var(--mono);font-size:12px;letter-spacing:.05em;
  color:color-mix(in oklab,var(--paper) 78%,transparent);line-height:2;
}
[data-theme="dark"] .meta-card{border-color:var(--line);color:var(--muted-ink)}
.meta-card .domain{margin-top:14px;color:var(--paper)}
[data-theme="dark"] .meta-card .domain{color:var(--accent)}
@media(max-width:760px){.strip{padding:36px 24px}.strip-grid{grid-template-columns:1fr;gap:28px}}

/* ---------- Contact cards --------------------------------------------- */
.contact-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.contact-card{background:var(--paper-2);border:1px solid var(--line-soft);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column}
.contact-card .num{font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--accent);text-transform:uppercase;margin-bottom:14px}
.contact-card h3{font-family:var(--serif);font-weight:500;font-size:20px;margin:0 0 8px}
.contact-card p{font-size:14.5px;color:var(--ink-soft);flex:1;margin:0 0 18px}
@media(max-width:820px){.contact-cards{grid-template-columns:1fr}}

/* ---------- Footnote -------------------------------------------------- */
.footnote{font-size:13px;color:var(--muted-ink);margin-top:28px;max-width:760px;line-height:1.6}

/* ---------- Footer ---------------------------------------------------- */
footer{background:var(--ink);color:var(--paper);padding:64px 0 32px;margin-top:0}
[data-theme="dark"] footer{background:var(--paper-2);border-top:1px solid var(--line)}
.f-top{display:grid;grid-template-columns:1.6fr repeat(3,1fr);gap:40px;padding-bottom:40px;border-bottom:1px solid color-mix(in oklab,var(--paper) 18%,transparent)}
[data-theme="dark"] .f-top{border-color:var(--line)}
footer .brand-name,footer p strong{color:var(--paper)}
[data-theme="dark"] footer .brand-name,[data-theme="dark"] footer p strong{color:var(--ink)}
footer h4{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:color-mix(in oklab,var(--paper) 60%,transparent);margin:0 0 16px;font-weight:500}
[data-theme="dark"] footer h4{color:var(--muted-ink)}
footer ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}
footer ul a{color:color-mix(in oklab,var(--paper) 78%,transparent);text-decoration:none;font-size:14px}
[data-theme="dark"] footer ul a{color:var(--ink-soft)}
footer ul a:hover{color:var(--paper)}
[data-theme="dark"] footer ul a:hover{color:var(--accent)}
.f-bot{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;padding-top:24px;font-size:12.5px}
.f-bot .copy{font-family:var(--mono);letter-spacing:.05em;color:color-mix(in oklab,var(--paper) 60%,transparent)}
[data-theme="dark"] .f-bot .copy{color:var(--muted-ink)}
.f-bot .disc{max-width:520px;color:color-mix(in oklab,var(--paper) 55%,transparent);line-height:1.6}
[data-theme="dark"] .f-bot .disc{color:var(--muted-ink)}
@media(max-width:820px){
  .f-top{grid-template-columns:repeat(3,1fr);gap:30px 24px}
  .f-top>div:first-child{grid-column:1/-1}   /* brand block spans full width on top */
}
@media(max-width:520px){
  .f-top{grid-template-columns:1fr 1fr;gap:26px 20px}
  footer{padding:48px 0 28px}
}

/* ---------- Toast ----------------------------------------------------- */
#toast{
  position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(20px);
  background:var(--ink);color:var(--paper);padding:12px 20px;border-radius:999px;
  font-size:13.5px;z-index:120;opacity:0;pointer-events:none;transition:opacity .25s,transform .25s;
  box-shadow:var(--shadow);
}
[data-theme="dark"] #toast{background:var(--accent);color:var(--accent-ink)}
#toast[data-visible="true"]{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- Misc reveal animation ------------------------------------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal{opacity:1;transform:none}
}
