/* =============================
   styles.css — 宇宙物理（理論）M1 個人ページ
   ============================= */

/* ===== 基本レイアウトとテーマ ===== */

:root{
  --bg:#ffffff;
  --fg:#101418;
  --muted:#5b6470;
  --card:#f6f8fa;
  --accent:#2d6cdf;
  --border:#e5e7eb;
  --shadow:0 6px 24px rgba(2,6,23,.06);
  color-scheme: light dark;
}

html[data-theme="dark"]{
  --bg:#0b0f14;
  --fg:#eef2f7;
  --muted:#9aa4af;
  --card:#121821;
  --accent:#6aa8ff;
  --border:#293241;
  --shadow:0 6px 24px rgba(0,0,0,.45);
}

html,body{height:100%}
body{
  margin:0;
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Hiragino Kaku Gothic ProN","Yu Gothic UI","Yu Gothic","Noto Sans JP",sans-serif;
  background:var(--bg);
  color:var(--fg);
  line-height:1.65;
  letter-spacing:.02em;
}

a{color:var(--accent); text-decoration:none}
a:hover{text-decoration:underline}

.wrap{max-width:980px; margin:0 auto; padding:0 20px}
.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:16px;
  box-shadow:var(--shadow);
}

/* ===== ヘッダー／ナビ ===== */
header.site-header{
  position:sticky; top:0; z-index:50;
  backdrop-filter:saturate(180%) blur(8px);
  background:var(--bg); /* fallback */
  background:color-mix(in oklab, var(--bg) 85%, transparent);
  border-bottom:1px solid var(--border);
}
.nav{display:flex; align-items:center; justify-content:space-between; gap:12px; padding:12px 0}
.brand{display:flex; align-items:center; gap:12px; font-weight:700}
.brand .avatar{
  width:40px; height:40px; border-radius:50%;
  background:linear-gradient(135deg,#8ec5fc,#e0c3fc);
  border:1px solid var(--border);
}
nav a{padding:8px 10px; border-radius:10px}
nav a:hover{
  background:var(--card); /* fallback */
  background:color-mix(in oklab, var(--card) 65%, transparent);
  text-decoration:none;
}
nav a[aria-current="page"]{
  background: color-mix(in oklab, var(--card) 75%, transparent);
  border: 1px solid var(--border);
}
.toolbar{display:flex; gap:8px; align-items:center}
.btn{
  border:1px solid var(--border);
  background:var(--bg);
  color:var(--fg);
  border-radius:12px;
  padding:8px 12px;
  cursor:pointer;
  font:inherit;
}
.btn:hover{
  background:var(--card); /* fallback */
  background:color-mix(in oklab, var(--card) 70%, transparent);
}

/* ===== ヒーロー ===== */
.hero{
  display:grid;
  grid-template-columns:120px 1fr;
  gap:20px;
  padding:28px 0 12px;
  align-items:center;
}
.hero .photo{
  width:120px; height:120px; border-radius:20px;
  background:linear-gradient(135deg,#a8edea 0%, #fed6e3 100%);
  border:1px solid var(--border);
}
.hero h1{margin:0; font-size:clamp(24px,3vw,34px); letter-spacing:.01em}
.hero p.tagline{margin:6px 0 0; color:var(--muted)}
.meta{
  display:flex; flex-wrap:wrap; gap:10px 14px;
  margin-top:12px; font-size:14px; color:var(--muted);
}

/* ===== セクション ===== */
section{padding:28px 0}
section h2{font-size:20px; margin:0 0 12px}
.grid{display:grid; grid-template-columns:1fr; gap:14px}
.item{padding:16px}
.kicker{color:var(--muted); font-size:13px; letter-spacing:.08em; text-transform:uppercase}

/* ===== リスト ===== */
.pubs{padding-left:20px}
.pubs li{margin:10px 0}

/* ===== フッター／その他 ===== */
footer{
  padding:28px 0 40px;
  color:var(--muted);
  font-size:14px;
  border-top:1px solid var(--border);
  margin-top:20px;
}
.pill{
  display:inline-flex; align-items:center; gap:6px;
  padding:6px 10px; border-radius:999px;
  background:var(--card); border:1px solid var(--border);
  font-size:13px;
}
.icons{display:flex; flex-wrap:wrap; gap:8px}

.two{display:grid; grid-template-columns:1fr; gap:14px}
@media (min-width:820px){ .two{ grid-template-columns:1fr 1fr } }

/* ===== アクセシビリティ（フォーカス表示） ===== */
a:focus-visible, .btn:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:2px;
  border-radius:12px;
}

/* ===== 印刷（PDF化向け） ===== */
@media print{
  header,.toolbar,#backToTop{display:none !important}
  .card{box-shadow:none}
  a[href^="http"]::after{
    content:" (" attr(href) ")"; font-size:10px; color:var(--muted);
  }
}

/* ===== 浮遊ボタン ===== */
#backToTop{position:fixed; right:16px; bottom:16px; display:none}












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/* ===== 基本レイアウトとテーマ ===== */
:root {
  --bg: #ffffff;
  --fg: #101418;
  --muted: #5b6470;
  --card: #f6f8fa;
  --accent: #2d6cdf;
  --border: #e5e7eb;
  --shadow: 0 6px 24px rgba(2, 6, 23, .06);
  color-scheme: light dark;
}
html[data-theme="dark"] {
  --bg: #0b0f14;
  --fg: #eef2f7;
  --muted: #9aa4af;
  --card: #121821;
  --accent: #6aa8ff;
  --border: #293241;
  --shadow: 0 6px 24px rgba(0,0,0,.45);
}
html, body { height: 100%; }
body {
  margin: 0; font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Yu Gothic", "Noto Sans JP", sans-serif;
  background: var(--bg); color: var(--fg);
  line-height: 1.65; letter-spacing: .02em;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 980px; margin: 0 auto; padding: 0 20px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; box-shadow: var(--shadow); }
/* ===== ヘッダー／ナビ ===== */
header.site-header { position: sticky; top: 0; z-index: 50; backdrop-filter: saturate(180%) blur(8px); background: color-mix(in oklab, var(--bg) 85%, transparent); border-bottom: 1px solid var(--border); }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 0; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; }
.brand .avatar { width: 40px; height: 40px; border-radius: 50%; background: linear-gradient(135deg, #8ec5fc, #e0c3fc); border: 1px solid var(--border); }
nav a { padding: 8px 10px; border-radius: 10px; }
nav a:hover { background: color-mix(in oklab, var(--card) 65%, transparent); text-decoration: none; }
.toolbar { display: flex; gap: 8px; align-items: center; }
.btn { border: 1px solid var(--border); background: var(--bg); color: var(--fg); border-radius: 12px; padding: 8px 12px; cursor: pointer; font: inherit; }
.btn:hover { background: color-mix(in oklab, var(--card) 70%, transparent); }
/* もともと nav にスタイルなければ新規に追加 */
.site-header nav {flex: 1; /* 左右の余白を飲み込む */ display: flex; justify-content: center;  /* 中央揃え */ gap: 8px;  /* リンク間の間隔はお好みで */}
/* ===== ヒーロー ===== */
.hero { display: grid; grid-template-columns: 120px 1fr; gap: 20px; padding: 28px 0 12px; align-items: center; }
.hero .photo { width: 120px; height: 120px; border-radius: 20px; background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%); border: 1px solid var(--border); }
.hero h1 { margin: 0; font-size: clamp(24px, 3vw, 34px); letter-spacing: .01em; }
.hero p.tagline { margin: 6px 0 0; color: var(--muted); }
.meta { display: flex; flex-wrap: wrap; gap: 10px 14px; margin-top: 12px; font-size: 14px; color: var(--muted); }
/* ===== セクション ===== */
section { padding: 28px 0; }
section h2 { font-size: 20px; margin: 0 0 12px; }
.grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
.item { padding: 16px; }
.kicker { color: var(--muted); font-size: 13px; letter-spacing: .08em; text-transform: uppercase; }
/* ===== リスト ===== */
.pubs { padding-left: 20px; }
.pubs li { margin: 10px 0; }
/* ===== フッター／その他 ===== */
footer { padding: 28px 0 40px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--border); margin-top: 20px; }
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 6px 10px; border-radius: 999px; background: var(--card); border: 1px solid var(--border); font-size: 13px; }
.icons { display: flex; flex-wrap: wrap; gap: 8px; }
.two { display: grid; grid-template-columns: 1fr; gap: 14px; }
@media (min-width: 820px) {
  .two { grid-template-columns: 1fr 1fr; }
}

/* ===== 印刷（PDF化向け） ===== */
@media print {
  header, .toolbar, #backToTop { display: none !important; }
  .card { box-shadow: none; }
  a[href^="http"]::after { content: " (" attr(href) ")"; font-size: 10px; color: var(--muted); }
}
/* ===== 浮遊ボタン ===== */
#backToTop { position: fixed; right: 16px; bottom: 16px; display: none; }