:root{
  --bg:#050912;--bg2:#0a1222;--panel:#0b1524cc;--line:#1c2c44;--line2:#2a4262;
  --text:#e6f1ff;--muted:#8199b8;--cyan:#5fe3f5;--cyan-dim:#5fe3f533;--red:#ff4d6d;--amber:#ffbf5c;
  --sans:"Hiragino Sans","Noto Sans JP",system-ui,sans-serif;
  --mono:"SF Mono",ui-monospace,Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html{background:var(--bg)}
body{
  margin:0;min-height:100vh;color:var(--text);font:15px/1.7 var(--sans);
  background:
    radial-gradient(1200px 600px at 85% -10%,#0f2c4a66,transparent 60%),
    radial-gradient(900px 500px at -10% 110%,#3a0d1c44,transparent 60%),
    linear-gradient(var(--bg),var(--bg2));
}
body::before{ /* 細かいグリッド */
  content:"";position:fixed;inset:0;pointer-events:none;opacity:.35;
  background-image:linear-gradient(#5fe3f50d 1px,transparent 1px),linear-gradient(90deg,#5fe3f50d 1px,transparent 1px);
  background-size:32px 32px;mask-image:linear-gradient(#000,transparent 85%);
}
a{color:inherit}
i{font-style:normal;color:var(--muted)}

.masthead{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:16px;
  max-width:1280px;margin:0 auto;padding:22px 32px;border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:12px;font:600 15px/1.2 var(--mono);letter-spacing:.18em}
.brand svg{width:34px;height:34px;fill:none;stroke:var(--cyan);stroke-width:1.4;filter:drop-shadow(0 0 6px var(--cyan-dim))}
.brand small{display:block;margin-top:4px;font:500 11px var(--sans);letter-spacing:.08em;color:var(--muted)}
.eyebrow{margin:0;font:500 11px var(--mono);letter-spacing:.22em;color:var(--cyan)}

main{position:relative;max-width:1280px;margin:0 auto;padding:56px 32px 40px}
.intro{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:48px;align-items:end;margin-bottom:48px}
.intro h1{margin:0;font-size:clamp(30px,4.4vw,52px);line-height:1.2;letter-spacing:.02em;font-weight:800}
.intro p{margin:0;color:var(--muted);max-width:52ch}
.error{padding:14px 18px;border:1px solid var(--red);background:#ff4d6d14;color:#ffd5dc;font-size:14px}

.grid{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,380px),1fr));gap:28px}
.card{
  position:relative;display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--line);
  backdrop-filter:blur(8px);opacity:0;transform:translateY(10px);
  animation:rise .6s cubic-bezier(.2,.7,.2,1) forwards;animation-delay:calc(var(--i)*70ms);
  transition:border-color .25s,box-shadow .25s;
}
.card::before,.card::after{ /* 角ブラケット */
  content:"";position:absolute;width:14px;height:14px;border:1px solid var(--cyan);opacity:.0;transition:opacity .25s;
}
.card::before{top:-1px;left:-1px;border-right:0;border-bottom:0}
.card::after{bottom:-1px;right:-1px;border-left:0;border-top:0}
.card:hover,.card:focus-within{border-color:var(--line2);box-shadow:0 0 0 1px #5fe3f514,0 18px 50px -20px #5fe3f540}
.card:hover::before,.card:hover::after,.card:focus-within::before,.card:focus-within::after{opacity:1}
@keyframes rise{to{opacity:1;transform:none}}

.shot{position:relative;display:block;aspect-ratio:16/10;overflow:hidden;border-bottom:1px solid var(--line);background:#000}
.shot img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .6s cubic-bezier(.2,.7,.2,1),filter .3s;filter:saturate(.9) brightness(.92)}
.shot::after{ /* 走査線 */
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(#0000 0 2px,#0000002e 2px 3px);
}
.card:hover .shot img{transform:scale(1.035);filter:none}
.open{
  position:absolute;right:14px;bottom:12px;z-index:1;padding:5px 10px;font:600 11px var(--mono);letter-spacing:.2em;
  color:var(--bg);background:var(--cyan);opacity:0;transform:translateY(4px);transition:.25s;
}
.open i{color:inherit}
.card:hover .open,.shot:focus-visible .open{opacity:1;transform:none}

.meta{display:flex;flex-direction:column;gap:10px;padding:18px 20px 20px;flex:1}
.code{margin:0;font:500 11px var(--mono);letter-spacing:.18em;color:var(--cyan)}
.meta h2{margin:0;font-size:21px;line-height:1.35;letter-spacing:.02em}
.meta h2 a{text-decoration:none}
.desc{margin:0;color:var(--muted);font-size:14px}
.tags{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:2px 0 0;padding:0}
.tags li{padding:2px 8px;border:1px solid var(--line2);font:500 11px var(--mono);letter-spacing:.06em;color:#b8cbe4}
.actions{display:flex;align-items:center;gap:10px;margin-top:auto;padding-top:8px}
.actions a{
  padding:7px 14px;border:1px solid var(--line2);font-size:13px;text-decoration:none;white-space:nowrap;
  transition:border-color .2s,background .2s,color .2s;
}
.actions a:hover{border-color:var(--cyan);color:var(--cyan)}
.actions a.primary{border-color:#5fe3f580;background:#5fe3f514;color:var(--cyan)}
.actions a.primary:hover{background:#5fe3f526}
.actions a.primary i{color:inherit}
.actions time{margin-left:auto;font:11px var(--mono);color:var(--muted)}
a:focus-visible{outline:1px solid var(--cyan);outline-offset:3px}

.foot{
  max-width:1280px;margin:0 auto;padding:22px 32px 40px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:6px 28px;color:var(--muted);font-size:12px;
}

@media (max-width:760px){
  .masthead{padding:16px}
  .eyebrow{display:none}
  main{padding:36px 16px 28px}
  .intro{grid-template-columns:1fr;gap:16px;margin-bottom:32px}
  .grid{gap:20px}
  .foot{padding:18px 16px 32px}
}
@media (prefers-reduced-motion:reduce){
  .card{animation:none;opacity:1;transform:none}
  .shot img,.open{transition:none}
}