:root{
  --bg:#ffffff;
  --ink:#1a2330;
  --muted:#5a6578;
  --line:#e4e8ef;
  --alt:#f5f9fc;
  --accent:#4bb6e8;
  --accent-deep:#2a8fc4;
  --radius:14px;
  --maxw:980px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Noto Sans JP",system-ui,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{font-family:"Noto Serif JP",serif;line-height:1.3;font-weight:700}
a{color:var(--accent-deep);text-decoration:none}
a:hover{text-decoration:underline}

.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* header */
.site-header{
  position:sticky;top:0;z-index:10;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:60px;gap:16px}
.brand{font-weight:700;color:var(--ink)}
.nav{display:flex;gap:18px;flex-wrap:wrap}
.nav a{color:var(--muted);font-size:14px}
.nav a:hover{color:var(--accent-deep);text-decoration:none}

/* hero */
.hero{padding:64px 0 40px;background:linear-gradient(180deg,#eaf6fd 0%,#ffffff 100%)}
.hero-inner{display:flex;gap:32px;align-items:center;flex-wrap:wrap}
.avatar{
  width:140px;height:140px;border-radius:50%;
  object-fit:cover;border:4px solid #fff;
  box-shadow:0 6px 24px rgba(42,143,196,.18);
  background:#dbeefb;
}
.eyebrow{
  color:var(--accent-deep);letter-spacing:.15em;
  font-size:12px;text-transform:uppercase;margin:0 0 8px;
}
.hero h1{margin:0 0 8px;font-size:clamp(28px,5vw,40px)}
.hero h1 .en{font-size:.55em;color:var(--muted);margin-left:12px;font-weight:500}
.tagline{margin:4px 0;font-size:18px}
.school{margin:4px 0 0;color:var(--muted);font-size:14px}

/* sections */
.section{padding:72px 0}
.section.alt{background:var(--alt)}
.section h2{
  font-size:26px;margin:0 0 24px;
  padding-left:14px;border-left:4px solid var(--accent);
}
.lead{font-size:16px;max-width:680px}

/* about values */
.values{list-style:none;padding:0;display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));margin-top:24px}
.values li{
  background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:16px 18px;
}
.values strong{display:block;color:var(--accent-deep);font-size:13px;margin-bottom:4px}
.values span{color:var(--muted);font-size:14px}

/* lists */
.cert-list,.timeline,.community-list{list-style:none;padding:0;margin:0}
.cert-list li,.timeline li{
  padding:12px 0;border-bottom:1px dashed var(--line);
  display:flex;gap:16px;align-items:baseline;
}
.date{
  color:var(--accent-deep);font-size:13px;font-weight:500;
  min-width:72px;font-variant-numeric:tabular-nums;
}
.role{color:var(--muted);margin-bottom:16px}
.note{color:var(--muted);margin-top:20px;font-size:14px}

/* works */
.works-grid{
  display:grid;gap:20px;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
}
.work{
  background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:18px;
  transition:transform .2s,box-shadow .2s;
}
.work:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(42,143,196,.12)}
.thumb{
  aspect-ratio:16/10;border-radius:10px;margin-bottom:12px;
  background:linear-gradient(135deg,#eaf6fd,#c7e6f7);
}
.work h3{margin:0 0 6px;font-size:17px}
.work p{margin:4px 0;font-size:14px;color:var(--muted)}
.work .tech{color:var(--accent-deep);font-size:12px;font-weight:500}
.work .learn{color:var(--ink);font-size:13px;margin-top:8px}

/* community */
.community-list{display:grid;gap:16px}
.community-list li{
  background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:18px;
}
.community-list h3{margin:0 0 4px;font-size:17px}
.community-list .date{display:block;margin-bottom:6px}

.updated{color:var(--muted);font-size:13px;margin-top:16px}

/* footer */
.site-footer{
  padding:32px 0;text-align:center;
  color:var(--muted);font-size:13px;
  border-top:1px solid var(--line);
}

@media (max-width:640px){
  .nav{gap:12px;font-size:13px}
  .hero{padding:48px 0 32px}
  .avatar{width:110px;height:110px}
  .section{padding:56px 0}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .work{transition:none}
}