:root{
  --bg: #0b0c10;
  --bg-elev: #111317;
  --text: #e8eaed;
  --muted: #b4b7bd;
  --accent: #4fc3f7;
  --card: #161a20;
  --border: #232732;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,"Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;line-height:1.7}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1100px;margin:0 auto;padding:24px}
header{position:sticky;top:0;z-index:100;background:rgba(11,12,16,.8);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.nav{display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.nav a{padding:10px 12px;border-radius:10px}
.nav .brand{font-weight:700;letter-spacing:.2px}
.nav a.active{background:var(--card);text-decoration:none}
.hero{padding:56px 0;border-bottom:1px solid var(--border);background:linear-gradient(180deg, rgba(79,195,247,0.08), rgba(0,0,0,0))}
.hero h1{font-size:36px;margin:4px 0 8px}
.hero p{margin:0 0 16px;color:var(--muted)}
.btn{display:inline-block;background:var(--accent);color:#032333;padding:10px 16px;border-radius:999px;font-weight:700}
.btn:hover{text-decoration:none;opacity:.9}
.section{padding:32px 0;border-bottom:1px solid var(--border)}
.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;overflow:hidden}
.card .pad{padding:18px}
.avatar{width:100%;aspect-ratio:1/1;object-fit:cover;display:block}
.h2{font-size:24px;margin:0 0 8px}
.h3{font-size:18px;margin:0 0 8px;color:var(--text)}
.meta{color:var(--muted);font-size:14px}
footer{color:var(--muted);padding:40px 0}
blockquote{border-left:3px solid var(--accent);margin:8px 0;padding:8px 12px;color:#cfe9f9;background:#0c1a22}
.schedule{display:grid;grid-template-columns:1fr;gap:16px}
.slot{border:1px solid var(--border);border-radius:12px;background:var(--card);padding:16px}
.time{font-weight:700;color:#a7c3cf;margin-bottom:6px}
.slot h3{margin:6px 0}
.slot .desc{color:var(--muted)}
.kicker{letter-spacing:.08em;text-transform:uppercase;color:#a7c3cf;font-weight:700;font-size:12px}
.badge{display:inline-block;padding:2px 8px;border-radius:999px;border:1px solid var(--border);color:var(--muted);font-size:12px}
.two-col{display:grid;grid-template-columns:1fr;gap:16px}
.schedule.two-col{grid-template-columns:1fr 1fr}
.grid.speakers{grid-template-columns:repeat(12,1fr)}
.speaker-card{grid-column:span 12}
@media (min-width: 900px){
  .schedule.two-col{grid-template-columns:1fr 1fr}
  .grid.speakers{grid-template-columns:repeat(12,1fr)}
  .speaker-card{grid-column:span 6}
}
.small{font-size:13px;color:var(--muted)}
hr{border:none;border-top:1px solid var(--border);margin:24px 0}
ol,ul{padding-left:1.2rem}
img.responsive{max-width:100%;height:auto;display:block;border-radius:10px;border:1px solid var(--border);background:#0a0d12}