/* ===== tokens ===== */
:root{
  --bg:#ffffff;
  --card:#ffffff;
  --text:#1a1a1a;
  --muted:#555;
  --accent:#0b63ff;
  --accent-weak:#e6edff;
  --border:#dfe3ea;
  --maxw:980px;
  --radius:12px;
}

/* 背景を強制的に白に固定。以前のlinear-gradientを打ち消す */
html{background:var(--bg) !important}
body{
  margin:0;
  font-family:system-ui,"Hiragino Sans","Noto Sans JP",Meiryo,Arial,sans-serif;
  color:var(--text);
  background:var(--bg) !important;     /* ← shorthandで上書き */
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:var(--accent); text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:var(--maxw); margin:0 auto; padding:0 20px}

/* ===== header/nav ===== */
/* 暗い半透明+blurをやめて白背景に */
.site-header{
  position:sticky; top:0; z-index:50;
  background:#fff;
  border-bottom:1px solid var(--border);
  backdrop-filter:none;
}
.header-inner{display:flex; align-items:center; gap:24px; padding:14px 0}
.identity{flex:1 1 auto}
.site-title{font-size:26px; line-height:1.2; margin:0}
.site-subtitle{margin:2px 0 0; color:var(--muted); font-size:14px}
.site-nav{display:flex; gap:16px; flex-wrap:wrap}
.site-nav a{padding:8px 10px; border-radius:10px; color:var(--text)}
.site-nav a:hover{background:var(--accent-weak); text-decoration:none}

/* ===== sections ===== */
.section{padding:44px 0}
.section-title{
  font-size:22px; margin:0 0 18px;
  padding-bottom:10px; border-bottom:1px solid var(--border);
}
.lead{font-size:17px; color:var(--text); line-height:1.8}

/* ===== timeline ===== */
.timeline{list-style:none; padding:0; margin:0}
.timeline-item{
  display:grid; grid-template-columns:150px 1fr; gap:16px; padding:16px;
  background:#fff; border:1px solid var(--border); border-radius:var(--radius);
  margin-bottom:12px; box-shadow:0 2px 6px rgba(0,0,0,.04);
}
.timeline-year{color:var(--muted); font-weight:600}
.item-title{font-weight:700; margin-bottom:6px}
.item-meta{color:var(--muted); line-height:1.7}
@media (max-width:650px){
  .timeline-item{grid-template-columns:1fr}
  .timeline-year{order:2}
}

/* ===== publications / lists ===== */
.pub-list, .basic-list{list-style:none; padding:0; margin:0}
.pub-item, .basic-list li{
  background:#fff;
  border:1px solid var(--border);
  border-radius:var(--radius);
  margin-bottom:12px;
  padding:14px 16px;
  box-shadow:0 2px 6px rgba(0,0,0,.04);
}
.pub-title{font-weight:700; margin-bottom:6px}
.pub-meta, .pub-venue{color:var(--muted); font-size:.95rem}

/* ===== skeleton ===== */
/* 濃いグラデをやめて薄いシマーに */
.skeleton li{
  height:18px; border-radius:6px;
  background:linear-gradient(90deg, #f3f6fb, #eef2f7, #f3f6fb);
  background-size:200% 100%; animation:shine 1.2s infinite linear;
  border:1px solid var(--border);
}
@keyframes shine{
  0%{background-position:200% 0}
  100%{background-position:-200% 0}
}

/* ===== footer ===== */
/* 暗色半透明をやめて白に */
.site-footer{border-top:1px solid var(--border); margin-top:40px; background:#fff}
.footer-inner{padding:18px 0; color:var(--muted)}

/* ===== print ===== */
@media print{
  .site-header,.site-nav,.site-footer{display:none !important}
  .section{padding:0}
  a{text-decoration:underline}
}