/* motion-skills samples site — shared look for the hub (docs/index.html) and every skill page (docs/<skill>/index.html).
   Theme: an editing timeline. Cool graphite neutrals so the thumbnails carry the color, one playhead accent, monospace for
   timecodes and meta, and a ruler with a playhead under each page header.
   Dark by default, light when the system prefers it; <html data-theme="light|dark"> overrides both.
   Every color, font, size and radius below comes from these tokens; add a token instead of a raw value.
   Contrast (WCAG 2.2), measured on --bg / --card: dark ink 16.4 / 15.3, mute 7.4 / 6.9, accent 6.8 / 6.4, link 8.7 / 8.1,
   text on accent 6.8; light ink 16.6 / 18.3, mute 5.9 / 6.5, accent 4.7 / 5.2, link 5.9 / 6.5, text on accent 5.2;
   control borders (--ctl) ≥ 3.0 in both. */
@font-face{font-family:"JetBrains Mono";src:url(fonts/JetBrainsMono.woff2) format("woff2");font-weight:100 800;font-display:swap}
/* meta face: the same font without the space, so Korean meta rows ("21 화풍 · 11개 언어") take Pretendard's space and Hangul */
@font-face{font-family:"Meta Mono";src:url(fonts/JetBrainsMono.woff2) format("woff2");font-weight:100 800;font-display:swap;unicode-range:U+0021-007E,U+00A1-024F,U+2010-2027,U+2030-206F,U+2190-21FF,U+2212}
:root{
  --bg:#0c0e11;--card:#14171c;--line:#232830;--tick:#2f3640;--ctl:#5f6975;--ink:#e9edf1;--mute:#97a1ac;
  --acc:#ff6b3d;--acc2:#ff9068;--on-acc:#1a0b05;--sel:rgba(255,107,61,.14);
  --img-bg:#000;--demo-bg:#07080c;
  --font-body:"Pretendard Variable",Pretendard,system-ui,-apple-system,"Apple SD Gothic Neo","Noto Sans KR",sans-serif;
  --font-head:var(--font-body);
  --font-mono:"JetBrains Mono",ui-monospace,Menlo,monospace;
  --font-meta:"Meta Mono","Pretendard Variable",Pretendard,system-ui,"Apple SD Gothic Neo","Noto Sans KR",sans-serif;
  --fs-xs:12px;--fs-mono:13px;--fs-s:14px;--fs-m:16px;--fs-l:20px;--fs-xl:26px;--fs-h1:clamp(32px,6vw,54px);
  --r-s:4px;--r-m:6px;--r-l:8px;
  --ease:180ms ease-out;
  color-scheme:dark}
:root[data-theme="light"]{--bg:#f3f4f6;--card:#ffffff;--line:#dde1e6;--tick:#c9ced5;--ctl:#7b8590;--ink:#12151a;--mute:#565f6b;--acc:#c2410c;--acc2:#a8380b;--on-acc:#ffffff;--sel:rgba(194,65,12,.1);color-scheme:light}
@media (prefers-color-scheme: light){:root:not([data-theme="dark"]){--bg:#f3f4f6;--card:#ffffff;--line:#dde1e6;--tick:#c9ced5;--ctl:#7b8590;--ink:#12151a;--mute:#565f6b;--acc:#c2410c;--acc2:#a8380b;--on-acc:#ffffff;--sel:rgba(194,65,12,.1);color-scheme:light}}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:var(--fs-m)/1.7 var(--font-body);overflow-x:hidden;word-break:keep-all;overflow-wrap:anywhere}
a{color:var(--acc2)}
:focus-visible{outline:2px solid var(--acc);outline-offset:2px;border-radius:var(--r-s)}
img{max-width:100%}
code{font:var(--fs-mono) var(--font-mono);background:var(--card);border:1px solid var(--line);padding:1px 6px;border-radius:var(--r-s);overflow-wrap:anywhere}
pre{margin:0;background:var(--card);border:1px solid var(--line);border-radius:var(--r-m);padding:12px 14px;overflow-x:auto;font:var(--fs-mono)/1.7 var(--font-mono);color:var(--ink)}
pre code{background:none;border:0;padding:0;font:inherit;overflow-wrap:normal}
.wrap{max-width:1180px;margin:0 auto;padding:0 16px}
h1{font:700 var(--fs-h1)/1.18 var(--font-head);letter-spacing:-.03em;margin:0 0 .4em;text-wrap:balance}
h2{font:700 var(--fs-xl)/1.3 var(--font-head);letter-spacing:-.02em;margin:0 0 8px;text-wrap:balance}
h3{font:700 var(--fs-l)/1.35 var(--font-head);letter-spacing:-.01em;margin:0 0 4px}
.lead{color:var(--mute);max-width:720px;margin:0}
.mute{color:var(--mute)}

/* top bar (every page) */
.topbar{border-bottom:1px solid var(--line);font-size:var(--fs-s)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:52px}
.topbar a{display:inline-flex;align-items:center;min-height:44px;color:var(--mute);text-decoration:none}
.topbar a:hover{color:var(--acc2)}
.topbar .brand{color:var(--ink);font:600 var(--fs-s) var(--font-meta);gap:10px}
/* keyframe diamond: the mark a timeline puts where a value is set */
.topbar .brand::before{content:"";width:9px;height:9px;background:var(--acc);transform:rotate(45deg);flex:none}
.topbar nav{display:flex;gap:20px}

/* page header */
.hero{position:relative;padding:44px 0 52px}
/* timeline ruler along the bottom of every page header: fine ticks every 8px, a long tick every 80px, and the playhead */
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:16px;border-bottom:1px solid var(--line);
  background:repeating-linear-gradient(to right,var(--tick) 0 1px,transparent 1px 8px) left bottom/100% 6px no-repeat,
             repeating-linear-gradient(to right,var(--ctl) 0 1px,transparent 1px 80px) left bottom/100% 12px no-repeat;
  pointer-events:none}
.hero::before{content:"";position:absolute;left:min(62%,calc(50% + 300px));bottom:0;width:11px;height:26px;background:var(--acc);
  clip-path:polygon(0 0,100% 0,100% 30%,60% 48%,60% 100%,40% 100%,40% 48%,0 30%);z-index:1;pointer-events:none}
.hero p{color:var(--mute);max-width:680px;margin:0}
.crumb{font:var(--fs-mono)/1.6 var(--font-meta);color:var(--mute);margin-bottom:8px}
.crumb a{color:var(--mute)}
.crumb a:hover{color:var(--acc2)}
/* tags: plain facts in one line, not pills */
.tags{display:flex;flex-wrap:wrap;list-style:none;padding:0;margin:14px 0 0;font:var(--fs-mono)/1.7 var(--font-meta);color:var(--mute)}
.tags li:not(:last-child)::after{content:"·";padding:0 .5em;color:var(--ctl)}

section{padding:44px 0;border-bottom:1px solid var(--line)}
section > .wrap > h2 + .lead{margin-bottom:4px}

/* buttons (links styled as buttons, demo switches, filter chips) */
.btns{display:flex;flex-wrap:wrap;gap:8px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:8px 16px;border:1px solid var(--ctl);border-radius:var(--r-s);text-decoration:none;color:var(--ink);font:var(--fs-s)/1.3 var(--font-body);background:var(--card);cursor:pointer;transition:border-color var(--ease),background-color var(--ease)}
.btn:hover{border-color:var(--acc)}
.btn.p{background:var(--acc);border-color:var(--acc);color:var(--on-acc);font-weight:600}
.btn[aria-pressed="true"]{border-color:var(--acc);box-shadow:inset 0 0 0 1px var(--acc);background:var(--sel);font-weight:600}
.btn .n{color:var(--mute);font:var(--fs-xs) var(--font-meta);margin-left:6px;font-variant-numeric:tabular-nums}

/* copy button added to command blocks by site.js */
.cmd{display:flex;flex-direction:column-reverse;align-items:flex-end;gap:6px}
.cmd pre{width:100%}
.cmd .copy{padding:4px 14px}

/* hub: the skill cards come first, right under a short header: the poster is each skill's real frames */
.hero.hub{padding:40px 0 56px}
.hero.hub h1{max-width:16em}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,420px),1fr));gap:24px;margin-top:20px}
.card{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.card .img{display:block;background:var(--img-bg);border-radius:var(--r-m);overflow:hidden;margin-top:20px}
.card .img img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover}
.card .body{display:flex;flex-direction:column;gap:10px;padding:16px 0 4px;flex:1}
.card h3{font-size:var(--fs-xl);margin:0}
.card h3 a{color:var(--ink);text-decoration:none}
.card h3 a:hover{color:var(--acc2)}
.card .tagline{margin:0;color:var(--mute)}
.card .tags{margin:0}
.card .stats{margin:0;font:600 var(--fs-mono)/1.6 var(--font-meta);color:var(--acc2)}
.card .from{margin:0;color:var(--mute);font-size:var(--fs-s)}
.card .btns{margin-top:auto;padding-top:6px}
.duo{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:28px 48px;align-items:start}
.duo p{color:var(--mute);margin:0 0 14px;max-width:640px}

/* skill page: workflow + demo side by side */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.35fr);gap:32px;align-items:start}
.how dl{display:grid;grid-template-columns:max-content minmax(0,1fr);gap:8px 16px;margin:14px 0 20px}
.how dt{font-weight:600}
.how dd{margin:0;color:var(--mute)}
.how > pre,.how > .cmd{margin-bottom:12px}
.demo{background:var(--card);border:1px solid var(--line);border-radius:var(--r-l);overflow:hidden}
.demo iframe{display:block;width:100%;aspect-ratio:var(--ar,16/10.6);border:0;background:var(--demo-bg)}
.demo .bar{display:flex;gap:8px;align-items:center;justify-content:space-between;flex-wrap:wrap;padding:8px 12px;border-top:1px solid var(--line);font:var(--fs-mono)/1.6 var(--font-meta);color:var(--mute);font-variant-numeric:tabular-nums}
.demo noscript a{display:block;padding:12px}

/* galleries */
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.chips[hidden]{display:none}
.group{margin-top:32px}
.group > h3{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.group > h3 small{font:400 var(--fs-mono)/1.4 var(--font-meta);color:var(--mute)}
.group > p{color:var(--mute);margin:0;max-width:760px;font-size:var(--fs-s)}
.group[hidden],.tile[hidden]{display:none}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,260px),1fr));gap:16px;margin-top:16px}
.tile{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--r-m);overflow:hidden;text-decoration:none;color:var(--ink);transition:border-color var(--ease)}
.tile:hover{border-color:var(--acc)}
.tile:focus-visible{border-color:var(--acc);border-radius:var(--r-m)}
.tile img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;background:var(--img-bg)}
.cap{padding:12px 14px 14px;display:flex;flex-direction:column;gap:2px}
.cap .no{color:var(--acc);font:600 var(--fs-xs)/1.5 var(--font-meta)}
.cap b{font-size:var(--fs-m);margin-top:4px;line-height:1.45}
.cap .en{color:var(--mute);font-size:var(--fs-s);line-height:1.5}
.cap .sc{color:var(--acc2);font-size:var(--fs-s);margin-top:4px}
.cap .how{color:var(--mute);font-size:var(--fs-s);line-height:1.6;margin-top:6px}

/* worked examples: a plain list of rows, not another set of cards */
.works{list-style:none;padding:0;margin:18px 0 0;max-width:820px}
.work{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:2px 24px;padding:14px 0;border-top:1px solid var(--line);text-decoration:none;color:var(--ink)}
.work:last-child{border-bottom:1px solid var(--line)}
.work b{font-weight:600;grid-column:1}
.work span{color:var(--mute);font-size:var(--fs-s);grid-column:1}
.work .url{color:var(--acc2);grid-column:2;grid-row:1 / span 2;align-self:center;text-decoration:underline}
.work:hover b{color:var(--acc2)}
.links{list-style:none;padding:0;margin:16px 0 0;display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,260px),1fr));gap:0 24px}
.links li{padding:4px 0 8px;border-bottom:1px dashed var(--line)}
.links li a{display:inline-flex;align-items:center;min-height:44px}
.links li span{display:block;color:var(--mute);font-size:var(--fs-s);line-height:1.5}

footer{padding:28px 0 48px;color:var(--mute);font-size:var(--fs-s)}
footer a{display:inline-flex;align-items:center;min-height:44px}

@media (max-width:820px){
  .split,.duo{grid-template-columns:minmax(0,1fr)}
  .demo iframe{aspect-ratio:auto;height:var(--h-phone,min(86vh,760px))}
  .hero{padding-top:30px}
  .work{grid-template-columns:minmax(0,1fr)}
  .work .url{grid-column:1;grid-row:auto}
}
@media (max-width:480px){
  .how dl{grid-template-columns:minmax(0,1fr);gap:0}
  .how dd{margin-bottom:10px}
}
@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important}}