:root{--bg:#070d1f;--bg2:#0c1530;--line:#1c2b55;--tx:#e6edff;--mut:#8ea0cf;--ac:#00e5c4;--ac2:#4aa3ff;--warn:#ffd166}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--tx);font:16px/1.85 -apple-system,"Hiragino Sans","Noto Sans JP",system-ui,sans-serif;overflow-x:hidden}
#bg{position:fixed;inset:0;width:100%;height:100%;z-index:0;opacity:.55}
main,.top,.ft{position:relative;z-index:2}
a{color:var(--ac2)}
.top{display:flex;justify-content:space-between;align-items:center;padding:14px 20px;backdrop-filter:blur(10px);background:rgba(7,13,31,.72);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.logo{display:flex;align-items:center;gap:10px;color:var(--tx);text-decoration:none;font-weight:800}
.top nav{display:flex;gap:16px;flex-wrap:wrap}.top nav a{color:var(--mut);text-decoration:none;font-size:14px}.top nav a:hover{color:var(--ac)}
main{max-width:920px;margin:0 auto;padding:0 18px 80px}
.hero{padding:64px 0 28px}.hero.small{padding:34px 0 10px}
.k{font:800 11px ui-monospace,Menlo,monospace;letter-spacing:.3em;color:var(--ac)}
h1{font:900 clamp(44px,10vw,92px)/1.02 "Hiragino Mincho ProN","Yu Mincho",serif;margin:12px 0 14px;letter-spacing:.02em}
h1 span{display:block;font:italic 700 clamp(16px,3vw,26px)/1.3 Georgia,serif;color:var(--ac);letter-spacing:.32em;margin-top:6px;text-transform:uppercase}
.lead{font-size:clamp(16px,2.2vw,19px);color:#c6d3f5;max-width:720px}.lead b{color:#fff;background:linear-gradient(transparent 62%,rgba(0,229,196,.35) 62%)}
.chainbar{margin-top:22px;display:flex;gap:12px;align-items:center;flex-wrap:wrap;padding:12px 16px;border:1px solid var(--line);border-radius:14px;background:linear-gradient(135deg,rgba(12,21,48,.9),rgba(8,40,60,.7));position:relative;overflow:hidden}
.chainbar:before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,transparent 30%,rgba(0,229,196,.18) 50%,transparent 70%);transform:translateX(-100%);animation:sweep 5s linear infinite}
@keyframes sweep{to{transform:translateX(100%)}}
.chainbar .lbl{font:800 10px ui-monospace,monospace;letter-spacing:.25em;color:var(--mut)}
.chainbar code{font:600 12px ui-monospace,Menlo,monospace;color:var(--ac);word-break:break-all;flex:1;min-width:200px}
.vs{font-size:12px;font-weight:700;color:var(--warn)}.vs.ok{color:#4ee0b5}.vs.ng{color:#ff6b8b}
h2{font:800 22px/1.4 "Hiragino Mincho ProN","Yu Mincho",serif;margin:42px 0 14px}
.rules .five{padding-left:1.2em}.rules .five li{margin:6px 0;color:#c6d3f5}.rules .five b{color:#fff}
.notice{margin:18px 0;padding:14px 18px;border:1px solid rgba(255,209,102,.5);border-radius:12px;background:rgba(255,209,102,.07);font-size:14px}
.types{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:10px}
.types li{border:1px solid var(--line);border-left:3px solid var(--tc);border-radius:10px;padding:10px 14px;background:rgba(12,21,48,.7);font-size:13px}.types b{display:block;color:var(--tc)}.types span{color:var(--mut)}
.row{display:flex;justify-content:space-between;align-items:center;gap:12px}
.btn{cursor:pointer;border:0;border-radius:999px;padding:10px 22px;font:700 14px inherit;color:#04121f;background:linear-gradient(90deg,var(--ac2),var(--ac));box-shadow:0 0 22px rgba(0,229,196,.35)}
.btn:disabled{opacity:.5;cursor:wait}.btn.ghost{background:transparent;color:var(--ac);border:1px solid var(--ac);box-shadow:none}
.topics{display:grid;gap:12px;margin-top:14px}
.topic{display:block;text-decoration:none;color:var(--tx);border:1px solid var(--line);border-radius:16px;padding:16px 20px;background:linear-gradient(135deg,rgba(12,21,48,.92),rgba(10,28,50,.8));transition:.25s;position:relative;overflow:hidden}
.topic:hover{border-color:var(--ac);transform:translateY(-2px);box-shadow:0 8px 30px rgba(0,229,196,.15)}
.topic .n{font:700 12px ui-monospace,monospace;color:var(--ac);margin-right:8px}.topic b{font-size:18px}.topic p{margin:6px 0;color:var(--mut);font-size:14px}.topic .m{display:flex;gap:14px;flex-wrap:wrap;font-size:12px;color:var(--mut)}
.ai{display:inline-block;font:700 10px/1 system-ui;letter-spacing:.08em;padding:3px 7px;border-radius:999px;border:1px solid var(--warn);color:var(--warn);margin-left:6px}
.back{color:var(--mut);text-decoration:none;font-size:14px}
.thread{margin-top:14px}
.nest{position:relative}.nest .nest{margin-left:26px;padding-left:18px;border-left:1px dashed rgba(0,229,196,.35)}
.blk{display:grid;grid-template-columns:34px 1fr;gap:10px;margin:14px 0;animation:rise .6s both}
@keyframes rise{from{opacity:0;transform:translateY(14px)}}
.rail{display:flex;flex-direction:column;align-items:center;gap:6px}
.rail .dot{width:12px;height:12px;border-radius:50%;background:var(--tc);box-shadow:0 0 0 4px rgba(255,255,255,.05),0 0 16px var(--tc);margin-top:8px;animation:pulse 3s infinite}
@keyframes pulse{50%{box-shadow:0 0 0 7px rgba(255,255,255,.02),0 0 26px var(--tc)}}
.rail .no{font:700 10px ui-monospace,monospace;color:var(--mut)}
.card{border:1px solid var(--line);border-left:3px solid var(--tc);border-radius:14px;padding:14px 18px;background:linear-gradient(135deg,rgba(12,21,48,.94),rgba(8,18,40,.86))}
.card header{display:flex;gap:10px;align-items:center;flex-wrap:wrap;font-size:13px}
.ty{font:800 11px ui-monospace,monospace;letter-spacing:.12em;color:#04121f;background:var(--tc);padding:2px 9px;border-radius:999px}
.hd{color:#fff}.tg{color:var(--mut);font:12px ui-monospace,monospace}time{color:var(--mut);font-size:12px;margin-left:auto}
.tt{font:800 22px/1.5 "Hiragino Mincho ProN","Yu Mincho",serif;margin:10px 0 4px}
.bd{margin:8px 0;word-break:break-word}.rs{margin:8px 0;padding:8px 12px;border-left:3px solid var(--tc);background:rgba(255,122,168,.07);border-radius:0 8px 8px 0;font-size:14px;color:#d9e2ff}.rs span{display:block;font:800 10px ui-monospace,monospace;letter-spacing:.14em;color:var(--tc)}
.hid{color:var(--mut);font-style:italic}
.ulink{display:inline-flex;align-items:center;gap:6px;color:var(--ac2);word-break:break-all}.ulink .dom{font:700 10px ui-monospace,monospace;color:#04121f;background:var(--ac2);border-radius:5px;padding:1px 6px}
.med{margin:10px 0}.med img,.med video{max-width:100%;max-height:420px;border-radius:12px;border:1px solid var(--line);background:#000}.med figcaption{font-size:11px;color:var(--mut);margin-top:3px}
.card footer{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:10px;font-size:12px}
.hs{font:600 11px ui-monospace,Menlo,monospace;color:var(--ac)}.hs em{font-style:normal;margin-left:6px;color:var(--warn)}.hs em.ok{color:#4ee0b5}.hs em.ng{color:#ff6b8b}
.pv{font:11px ui-monospace,monospace;color:var(--mut)}
.rx,.rp,.rpt{cursor:pointer;border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--mut);border-radius:999px;padding:3px 10px;font:inherit;font-size:12px}.rx:hover,.rp:hover{border-color:var(--ac);color:var(--ac)}.rpt{opacity:.6}.rx b{color:#fff}
.rp{margin-left:auto}
.compose{border:1px solid var(--ac);border-radius:16px;padding:18px;background:rgba(7,18,40,.95);margin:16px 0;box-shadow:0 0 40px rgba(0,229,196,.12)}
.compose h3{margin:0 0 10px;font-size:15px;color:var(--ac)}
.chips{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}.chips button{cursor:pointer;border:1px solid var(--line);background:transparent;color:var(--mut);border-radius:999px;padding:4px 12px;font:700 12px inherit}.chips button.on{background:var(--tc);color:#04121f;border-color:var(--tc)}
.compose input,.compose textarea{width:100%;background:#050a1a;color:var(--tx);border:1px solid var(--line);border-radius:10px;padding:10px 12px;font:inherit;margin:4px 0 8px}.compose textarea{min-height:110px;resize:vertical}.compose label{font-size:12px;color:var(--mut);display:block}
.compose .hint{font-size:12px;color:var(--mut);margin:0 0 8px}.compose .err{color:#ff6b8b;font-size:13px;min-height:1.2em}
.files{display:flex;gap:8px;flex-wrap:wrap;margin:6px 0}.files .f{font-size:12px;border:1px solid var(--line);border-radius:8px;padding:4px 8px;color:var(--mut)}.files .f b{color:var(--ac)}
.prog{height:3px;background:var(--line);border-radius:3px;overflow:hidden;margin:6px 0}.prog i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--ac2),var(--ac));transition:width .2s}
.empty{color:var(--mut)}
.ft{text-align:center;padding:30px 18px 50px;color:var(--mut);font-size:12px}
.chaingrid{display:flex;flex-wrap:wrap;gap:6px;margin:16px 0}.cell{width:30px;height:30px;border-radius:6px;border:1px solid var(--line);background:#0b1430;font:600 9px/30px ui-monospace,monospace;text-align:center;color:var(--mut);transition:.2s}.cell.ok{background:rgba(0,229,196,.18);border-color:var(--ac);color:var(--ac);box-shadow:0 0 10px rgba(0,229,196,.4)}.cell.ng{background:rgba(255,107,139,.2);border-color:#ff6b8b;color:#ff6b8b}.cell.hid{opacity:.6}
.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;font-size:13px}.kv dt{color:var(--mut)}.kv dd{margin:0;font-family:ui-monospace,monospace;word-break:break-all;color:#fff}
.honest{border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin:16px 0;font-size:14px;color:#c6d3f5;background:rgba(12,21,48,.7)}
@media(max-width:640px){.blk{grid-template-columns:22px 1fr}.nest .nest{margin-left:10px;padding-left:10px}time{margin-left:0}.card{padding:12px 14px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}