/* ============================================================
   Leta — project page
   Design tokens first, then layout, then components.
   ============================================================ */

:root{
  /* neutrals */
  --bg:#fbfbfc;
  --surface:#ffffff;
  --surface-2:#f4f6f9;
  --ink:#141a22;
  --ink-2:#39414d;
  --muted:#6b7482;
  --line:#e3e7ec;
  --line-2:#eef1f5;

  /* accents: Leta = indigo, DMD = coral */
  --leta:#3d63f0;
  --leta-soft:#ecf0ff;
  --leta-ink:#2746b8;
  --dmd:#e06a4f;
  --dmd-soft:#fdeee9;
  --dmd-ink:#b44a31;

  --video-bg:#0d1118;

  --shadow-sm:0 1px 2px rgba(18,24,34,.05), 0 2px 8px rgba(18,24,34,.04);
  --shadow-md:0 4px 12px rgba(18,24,34,.06), 0 12px 32px rgba(18,24,34,.06);
  --shadow-lg:0 18px 48px rgba(18,24,34,.12), 0 2px 8px rgba(18,24,34,.06);

  --r-sm:8px; --r-md:12px; --r-lg:16px; --r-xl:22px;
  --shell:1280px;
  --gut:clamp(18px,4vw,40px);

  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,"Helvetica Neue",Arial,sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
}

@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0c0f14;
    --surface:#13171f;
    --surface-2:#1a1f29;
    --ink:#f2f4f7;
    --ink-2:#c6ccd6;
    --muted:#8b95a3;
    --line:#242b36;
    --line-2:#1d232d;
    --leta:#7b97ff;
    --leta-soft:#1a2340;
    --leta-ink:#a8bbff;
    --dmd:#f08d72;
    --dmd-soft:#33201a;
    --dmd-ink:#f5ab95;
    --shadow-sm:0 1px 2px rgba(0,0,0,.4);
    --shadow-md:0 4px 14px rgba(0,0,0,.45);
    --shadow-lg:0 20px 50px rgba(0,0,0,.6);
  }
}
:root[data-theme="dark"]{
  --bg:#0c0f14;
  --surface:#13171f;
  --surface-2:#1a1f29;
  --ink:#f2f4f7;
  --ink-2:#c6ccd6;
  --muted:#8b95a3;
  --line:#242b36;
  --line-2:#1d232d;
  --leta:#7b97ff;
  --leta-soft:#1a2340;
  --leta-ink:#a8bbff;
  --dmd:#f08d72;
  --dmd-soft:#33201a;
  --dmd-ink:#f5ab95;
  --shadow-sm:0 1px 2px rgba(0,0,0,.4);
  --shadow-md:0 4px 14px rgba(0,0,0,.45);
  --shadow-lg:0 20px 50px rgba(0,0,0,.6);
}

/* ---------- base ---------- */

*,*::before,*::after{box-sizing:border-box}

html{scroll-behavior:smooth;scroll-padding-top:80px;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

a{color:inherit;text-decoration:none}
img{max-width:100%}
h1,h2,h3{text-wrap:balance}
p{text-wrap:pretty}

:focus-visible{outline:2px solid var(--leta);outline-offset:3px;border-radius:4px}

.skip-link{
  position:absolute;left:-9999px;top:0;z-index:100;
  padding:12px 18px;background:var(--ink);color:var(--bg);
  border-radius:0 0 var(--r-md) 0;font-size:14px;font-weight:600;
}
.skip-link:focus{left:0}

.shell{max-width:var(--shell);margin-inline:auto;padding-inline:var(--gut)}

/* ---------- header ---------- */

.site-header{
  position:sticky;top:0;z-index:30;
  background:color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter:blur(16px) saturate(180%);
  -webkit-backdrop-filter:blur(16px) saturate(180%);
  border-bottom:1px solid transparent;
  transition:border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:var(--shadow-sm)}

.nav{display:flex;align-items:center;gap:clamp(16px,3vw,32px);height:62px}

.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;letter-spacing:-.02em}
.brand-mark{
  width:28px;height:28px;flex:none;display:grid;place-items:center;
  border-radius:9px;background:var(--ink);color:var(--bg);
  font-size:14px;font-weight:800;letter-spacing:-.04em;
}

.nav-links{display:flex;gap:4px;margin-left:auto;font-size:14px}
.nav-links a{
  padding:7px 12px;border-radius:var(--r-sm);color:var(--muted);
  font-weight:500;transition:color .18s var(--ease), background .18s var(--ease);
}
.nav-links a:hover{color:var(--ink);background:var(--surface-2)}
.nav-links a[aria-current="true"]{color:var(--leta);background:var(--leta-soft)}

.theme-toggle{
  width:34px;height:34px;flex:none;display:grid;place-items:center;
  border:1px solid var(--line);border-radius:50%;
  background:var(--surface);color:var(--muted);cursor:pointer;
  transition:color .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease);
}
.theme-toggle:hover{color:var(--ink);border-color:var(--muted);transform:rotate(-15deg)}
.theme-toggle svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.7}
.icon-sun{display:none}
.icon-moon{display:block}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]) .icon-sun{display:block}
  :root:not([data-theme="light"]) .icon-moon{display:none}
}
:root[data-theme="dark"] .icon-sun{display:block}
:root[data-theme="dark"] .icon-moon{display:none}
:root[data-theme="light"] .icon-sun{display:none}
:root[data-theme="light"] .icon-moon{display:block}

/* ---------- shared bits ---------- */

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font:600 11px/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);margin:0;
}
.eyebrow::before{
  content:"";width:6px;height:6px;flex:none;border-radius:50%;
  background:var(--leta);box-shadow:0 0 0 4px var(--leta-soft);
}
.eyebrow.dmd-dot::before{background:var(--dmd);box-shadow:0 0 0 4px var(--dmd-soft)}

.section-head{max-width:720px;margin-bottom:clamp(28px,4vw,44px)}
.section-head h2{
  font-size:clamp(28px,4.2vw,44px);line-height:1.1;letter-spacing:-.035em;
  font-weight:700;margin:16px 0 0;
}
.section-head p{margin:14px 0 0;color:var(--muted);font-size:clamp(15px,1.4vw,17px);max-width:62ch}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:12px 22px;border-radius:999px;border:1px solid transparent;
  font-size:14px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform .18s var(--ease), box-shadow .18s var(--ease),
             background .18s var(--ease), border-color .18s var(--ease);
}
.btn svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:2;flex:none}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--ink);color:var(--bg);box-shadow:var(--shadow-md)}
.btn-primary:hover{box-shadow:var(--shadow-lg)}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{border-color:var(--muted);box-shadow:var(--shadow-md)}

/* Placeholder for a link that is not live yet (paper pending release).
   Styled as inert so it never reads as a broken link. */
.btn.is-pending{
  background:var(--surface-2);color:var(--muted);
  border-color:var(--line);box-shadow:none;cursor:default;
}
.btn.is-pending:hover{transform:none;box-shadow:none;border-color:var(--line)}
.btn.is-pending svg{opacity:.75}

/* ---------- hero ---------- */

.hero{
  position:relative;overflow:hidden;
  padding-block:clamp(56px,9vw,104px) clamp(44px,6vw,72px);
  text-align:center;
}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(60% 50% at 22% 0%, color-mix(in srgb,var(--leta) 13%,transparent), transparent 70%),
    radial-gradient(52% 46% at 82% 8%, color-mix(in srgb,var(--dmd) 11%,transparent), transparent 70%);
}
.hero-inner{max-width:1000px;margin-inline:auto}

.badge{
  display:inline-flex;align-items:center;gap:10px;
  padding:7px 15px 7px 11px;border-radius:999px;
  border:1px solid var(--line);background:var(--surface);
  box-shadow:var(--shadow-sm);
  font:600 11px/1 var(--mono);letter-spacing:.11em;text-transform:uppercase;
  color:var(--ink-2);
}
.badge i{
  width:6px;height:6px;border-radius:50%;background:var(--leta);
  box-shadow:0 0 0 4px var(--leta-soft);
}

h1.hero-title{
  font-size:clamp(38px,7.2vw,78px);line-height:1.03;letter-spacing:-.045em;
  font-weight:800;margin:24px 0 0;
}
h1.hero-title em{
  font-style:normal;
  background:linear-gradient(100deg,var(--leta),var(--dmd));
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}
.hero-sub{
  max-width:40ch;margin:20px auto 0;
  font-size:clamp(17px,2.1vw,23px);line-height:1.35;letter-spacing:-.02em;
  font-weight:600;color:var(--ink-2);
}
.hero-lede{
  max-width:60ch;margin:20px auto 0;
  color:var(--muted);font-size:clamp(15px,1.5vw,16px);
}

.authors{
  display:flex;justify-content:center;flex-wrap:wrap;
  gap:6px 18px;margin:30px auto 0;max-width:760px;
  font-size:15px;color:var(--ink-2);
}
.authors span{white-space:nowrap}
.authors b{font-weight:600}
sup{font-size:.62em;font-weight:700;color:var(--leta);margin-left:1px}

.affil{
  display:flex;justify-content:center;flex-wrap:wrap;gap:4px 10px;
  margin:16px 0 0;font-size:13.5px;color:var(--muted);
}
.affil span{white-space:nowrap}
.affil span::after{content:"·";margin-left:10px;opacity:.5}
.affil span:last-child::after{content:""}
.note{margin:10px 0 0;font-size:12.5px;color:var(--muted)}

.hero-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin-top:32px}

/* metric strip */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:1px;margin:clamp(40px,6vw,60px) auto 0;max-width:860px;
  background:var(--line);border:1px solid var(--line);
  border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-sm);
}
.metric{background:var(--surface);padding:20px 14px;text-align:center}
.metric dt{
  font:600 10px/1 var(--mono);letter-spacing:.12em;text-transform:uppercase;
  color:var(--muted);margin:0 0 9px;
}
.metric dd{margin:0;font-size:clamp(21px,2.6vw,27px);font-weight:700;letter-spacing:-.03em;line-height:1}
.metric dd small{font-size:12px;font-weight:600;color:var(--leta);margin-left:5px;letter-spacing:0}
.metric .sub{display:block;margin-top:7px;font-size:11.5px;font-weight:500;color:var(--muted);letter-spacing:0;text-wrap:balance}

/* ---------- section frames ---------- */

.section{padding-block:clamp(56px,8vw,96px);border-top:1px solid var(--line)}

/* ---------- results ---------- */

.toolbar{
  display:flex;align-items:center;flex-wrap:wrap;gap:14px 20px;
  padding:14px 18px;margin-bottom:22px;
  border:1px solid var(--line);border-radius:var(--r-lg);
  background:var(--surface);box-shadow:var(--shadow-sm);
}
.key{display:flex;align-items:center;gap:18px;font-size:13.5px}
.key span{display:flex;align-items:center;gap:7px;font-weight:600}
.key i{width:9px;height:9px;border-radius:50%;flex:none}
.key i.leta{background:var(--leta);box-shadow:0 0 0 3px var(--leta-soft)}
.key i.dmd{background:var(--dmd);box-shadow:0 0 0 3px var(--dmd-soft)}
.key small{font:500 11px var(--mono);text-transform:uppercase;letter-spacing:.07em;color:var(--muted)}
.toolbar-hint{margin-left:auto;font-size:12.5px;color:var(--muted)}

.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(14px,2vw,22px)}

.card{
  min-width:0;display:flex;flex-direction:column;
  border:1px solid var(--line);border-radius:var(--r-xl);
  background:var(--surface);box-shadow:var(--shadow-sm);
  transition:transform .26s var(--ease), box-shadow .26s var(--ease), border-color .26s var(--ease);
}
.card:hover,.card:focus-within{
  transform:translateY(-3px);box-shadow:var(--shadow-lg);
  border-color:color-mix(in srgb,var(--leta) 32%,var(--line));
}

.card-head{display:flex;align-items:flex-start;gap:12px;padding:16px 18px 12px}
.card-num{font:600 11px/1 var(--mono);letter-spacing:.1em;color:var(--leta)}
.card-head h3{margin:7px 0 0;font-size:16px;line-height:1.3;letter-spacing:-.02em;font-weight:650}
.expand{
  margin-left:auto;flex:none;width:30px;height:30px;display:grid;place-items:center;
  border:1px solid var(--line);border-radius:50%;
  background:transparent;color:var(--muted);cursor:pointer;
  transition:color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}
.expand svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2}
.expand:hover{color:var(--leta);border-color:var(--leta);background:var(--leta-soft)}

.card-prompt{padding:0 18px 14px}
.card-prompt>p{
  margin:0;font-size:13px;line-height:1.5;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-prompt details{margin-top:9px}
.card-prompt summary{
  list-style:none;cursor:pointer;width:max-content;
  font:600 11px var(--mono);letter-spacing:.06em;text-transform:uppercase;
  color:var(--leta);display:inline-flex;align-items:center;gap:6px;
}
.card-prompt summary::-webkit-details-marker{display:none}
.card-prompt summary::after{content:"+";font-size:14px;line-height:1}
.card-prompt details[open] summary::after{content:"\2013"}
.card-prompt summary:hover{text-decoration:underline;text-underline-offset:3px}
.card-prompt p.full{
  margin:10px 0 0;font-size:12.5px;line-height:1.6;color:var(--muted);
  padding:12px 14px;border-radius:var(--r-md);
  background:var(--surface-2);border:1px solid var(--line-2);
}

/* video pair */
.pair{
  display:grid;grid-template-columns:1fr 1fr;gap:1px;
  margin-top:auto;background:var(--line);
  border-top:1px solid var(--line);
  border-radius:0 0 var(--r-xl) var(--r-xl);overflow:hidden;
}
.tile{position:relative;min-width:0;background:var(--video-bg)}
.tile video{
  display:block;width:100%;aspect-ratio:832/480;
  object-fit:cover;background:var(--video-bg);
}
.tag{
  position:absolute;z-index:2;left:9px;top:9px;
  display:inline-flex;align-items:center;gap:5px;
  padding:5px 9px;border-radius:999px;
  background:rgba(10,14,20,.68);backdrop-filter:blur(8px);
  color:#fff;font:600 10px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;
}
.tag::before{content:"";width:5px;height:5px;border-radius:50%;background:currentColor}
.tag.leta{box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--leta) 60%,transparent)}
.tag.leta::before{background:#8fa6ff}
.tag.dmd{box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--dmd) 60%,transparent)}
.tag.dmd::before{background:#f5a98f}
.tag em{font-style:normal;opacity:.6;font-weight:500}

/* ---------- method ---------- */

.figure{
  margin:0;border:1px solid var(--line);border-radius:var(--r-xl);
  background:var(--surface);overflow:hidden;box-shadow:var(--shadow-sm);
}
.figure-bar{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px 16px;
  padding:13px 18px;border-bottom:1px solid var(--line);background:var(--surface-2);
}
.figure-bar b{font:600 10px/1 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--leta)}
.figure-bar span{font-size:12.5px;color:var(--muted);margin-left:auto}
.figure picture,.figure>img{display:block}
.figure img{width:100%;height:auto;background:#fff}
.figure figcaption{padding:16px 18px 18px;font-size:13px;line-height:1.6;color:var(--muted)}
.figure figcaption strong{color:var(--ink);font-weight:650}

.cards-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(14px,2vw,20px);margin:20px 0}

.concept{
  position:relative;display:flex;flex-direction:column;
  padding:24px 26px 26px;border:1px solid var(--line);border-radius:var(--r-xl);
  background:var(--surface);box-shadow:var(--shadow-sm);overflow:hidden;
}
.concept::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px}
.concept.a::before{background:var(--leta)}
.concept.b::before{background:var(--dmd)}
.concept-top{display:flex;align-items:center;gap:10px}
.concept-num{font:600 11px/1 var(--mono);letter-spacing:.1em}
.concept.a .concept-num{color:var(--leta)}
.concept.b .concept-num{color:var(--dmd)}
.concept-tag{
  margin-left:auto;padding:4px 10px;border-radius:999px;
  font:600 10px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;
}
.concept.a .concept-tag{background:var(--leta-soft);color:var(--leta-ink)}
.concept.b .concept-tag{background:var(--dmd-soft);color:var(--dmd-ink)}
.concept h3{margin:18px 0 10px;font-size:clamp(21px,2.4vw,26px);letter-spacing:-.03em;font-weight:700}
.concept p{margin:0;font-size:14.5px;line-height:1.62;color:var(--muted)}
.eq{
  display:flex;align-items:center;gap:10px;margin:20px 0 0;padding:12px 15px;
  border-radius:var(--r-md);background:var(--surface-2);border:1px solid var(--line-2);
  font:500 11px var(--mono);letter-spacing:.05em;text-transform:uppercase;color:var(--muted);
}
.eq b{font-family:var(--sans);font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em;text-transform:none}
.eq b sub{font-size:.68em;font-weight:600}

/* ---------- abstract ---------- */

.abstract-card{
  max-width:900px;margin-inline:auto;padding:clamp(28px,4vw,48px);
  border-radius:var(--r-xl);background:var(--ink);color:#f3f5f8;
  box-shadow:var(--shadow-lg);
}
.abstract-card .eyebrow{color:#9aa4b4}
.abstract-card .eyebrow::before{background:#8fa6ff;box-shadow:0 0 0 4px rgba(143,166,255,.16)}
.abstract-card p{
  margin:22px 0 0;font-size:clamp(15px,1.6vw,17px);line-height:1.72;
  color:#ccd3dd;
}
.abstract-card strong{color:#fff;font-weight:650}
.abstract-card .sd{color:#a8bbff}
.abstract-card .fc{color:#f5ab95}

/* ---------- citation / paper ---------- */

.paper-row{
  display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:24px;
}
.paper-row h2{margin:14px 0 6px;font-size:clamp(22px,2.6vw,30px);letter-spacing:-.03em;font-weight:700;max-width:30ch}
.paper-row p{margin:0;color:var(--muted);font-size:14px;max-width:52ch}
.paper-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}

.cite{
  margin-top:28px;border:1px solid var(--line);border-radius:var(--r-lg);
  background:var(--surface);overflow:hidden;box-shadow:var(--shadow-sm);
}
.cite-bar{
  display:flex;align-items:center;gap:12px;padding:11px 16px;
  border-bottom:1px solid var(--line);background:var(--surface-2);
}
.cite-bar b{font:600 10px/1 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.copy-btn{
  margin-left:auto;display:inline-flex;align-items:center;gap:7px;
  padding:6px 13px;border:1px solid var(--line);border-radius:999px;
  background:var(--surface);color:var(--ink-2);cursor:pointer;
  font:600 11px var(--mono);letter-spacing:.06em;text-transform:uppercase;
  transition:color .18s var(--ease), border-color .18s var(--ease);
}
.copy-btn:hover{color:var(--leta);border-color:var(--leta)}
.copy-btn.ok{color:var(--leta);border-color:var(--leta)}
.cite pre{
  margin:0;padding:16px 18px;overflow-x:auto;
  font:400 12.5px/1.75 var(--mono);color:var(--ink-2);
  -webkit-overflow-scrolling:touch;
}

/* ---------- footer ---------- */

.site-footer{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  padding-block:28px 40px;border-top:1px solid var(--line);
  font:500 11px var(--mono);letter-spacing:.07em;text-transform:uppercase;color:var(--muted);
}

/* ---------- modal ---------- */

.modal{display:none;position:fixed;inset:0;z-index:60}
.modal.open{display:block}
.modal-scrim{position:absolute;inset:0;background:rgba(8,11,16,.74);backdrop-filter:blur(6px)}
.modal-panel{
  position:relative;max-width:1120px;margin:clamp(12px,4vh,56px) auto;
  max-height:min(92vh,980px);overflow:auto;
  padding:clamp(22px,3vw,34px);border-radius:var(--r-xl);
  background:var(--surface);box-shadow:0 30px 90px rgba(0,0,0,.5);
  -webkit-overflow-scrolling:touch;
}
.modal-close{
  position:absolute;right:16px;top:16px;z-index:2;
  width:34px;height:34px;display:grid;place-items:center;
  border:1px solid var(--line);border-radius:50%;
  background:var(--surface);color:var(--muted);cursor:pointer;
  transition:color .18s var(--ease), border-color .18s var(--ease);
}
.modal-close svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:2}
.modal-close:hover{color:var(--ink);border-color:var(--muted)}
.modal-panel .eyebrow{margin-bottom:12px}
.modal-panel h2{margin:0 48px 10px 0;font-size:clamp(21px,2.6vw,29px);letter-spacing:-.035em;font-weight:700}
.modal-panel>p{margin:0;font-size:14px;line-height:1.65;color:var(--muted);max-width:76ch}
.modal-pair{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:22px}
.modal-pair figure{margin:0}
.modal-pair figcaption{
  display:flex;align-items:center;gap:7px;margin-bottom:9px;
  font:600 11px var(--mono);letter-spacing:.08em;text-transform:uppercase;
}
.modal-pair figcaption i{width:7px;height:7px;border-radius:50%;flex:none}
.modal-pair .m-leta figcaption{color:var(--leta)}
.modal-pair .m-leta figcaption i{background:var(--leta)}
.modal-pair .m-dmd figcaption{color:var(--dmd)}
.modal-pair .m-dmd figcaption i{background:var(--dmd)}
.modal-pair figcaption em{font-style:normal;color:var(--muted);font-weight:500}
.modal-pair video{
  display:block;width:100%;aspect-ratio:832/480;
  border-radius:var(--r-md);background:var(--video-bg);
}

/* ---------- responsive ---------- */

@media (max-width:980px){
  .metrics{grid-template-columns:repeat(2,1fr)}
  .cards-2{grid-template-columns:1fr}
}

@media (max-width:760px){
  .nav-links{display:none}
  .nav{height:56px}
  .theme-toggle{margin-left:auto}
  .grid{grid-template-columns:1fr}
  .toolbar-hint{margin-left:0;width:100%}
  .paper-row{display:block}
  .paper-actions{margin-top:22px}
  .modal-pair{grid-template-columns:1fr}
  .modal-panel{margin:0;border-radius:0;max-height:100vh;min-height:100vh}
  .site-footer{display:block}
  .site-footer span{display:block;margin-top:7px}
  .abstract-card{padding:26px 22px}
}

@media (max-width:420px){
  .metrics{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
}

@media print{
  .site-header,.theme-toggle,.modal,.hero-actions,.expand,.copy-btn{display:none!important}
  body{background:#fff}
}