/* 外光源宇宙論と層時間魔法学（HTML版） - compact & clear */

:root{
  --text:#111;
  --muted:#555;
  --border:#d9d9d9;
  --bg:#ffffff;
  --bg2:#fafafa;
  --link:#0b57d0;
}

html{ scroll-behavior:smooth; }

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Noto Serif JP","Noto Serif CJK JP","Hiragino Mincho ProN","Yu Mincho","MS Mincho",serif;
  line-height:1.75;
  font-size:14px; /* about 80% of previous */
}

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

.site-header{
  border-bottom:1px solid var(--border);
  background:var(--bg);
}

.header-inner{
  max-width:860px;
  margin:0 auto;
  padding:14px 16px 10px;
}

.site-title{
  font-family:"Noto Sans JP","Noto Sans CJK JP","Hiragino Kaku Gothic ProN","Yu Gothic","Meiryo",sans-serif;
  font-size:18px;
  margin:0;
  letter-spacing:0.02em;
}

.site-subtitle{
  margin:6px 0 0;
  color:var(--muted);
  font-size:13px;
}

.container{
  max-width:860px;
  margin:0 auto;
  padding:14px 16px 34px;
}

.page-title{
  font-family:"Noto Sans JP","Noto Sans CJK JP","Hiragino Kaku Gothic ProN","Yu Gothic","Meiryo",sans-serif;
  font-size:22px;
  margin:10px 0 6px;
}

.lead{ color:var(--muted); margin:6px 0 14px; }

nav.pager{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  align-items:center;
  justify-content:flex-start;
  padding:8px 0 12px;
  border-bottom:1px dashed var(--border);
  margin-bottom:14px;
  font-family:"Noto Sans JP","Noto Sans CJK JP","Hiragino Kaku Gothic ProN","Yu Gothic","Meiryo",sans-serif;
  font-size:13px;
}

nav.pager.bottom{
  border-top:1px dashed var(--border);
  border-bottom:none;
  margin-top:20px;
  padding-top:12px;
}

.pill{
  display:inline-block;
  padding:5px 9px;
  border:1px solid var(--border);
  border-radius:999px;
  background:var(--bg2);
  color:var(--text);
}

.pill:hover{ background:#f1f1f1; text-decoration:none; }

h2{
  font-family:"Noto Sans JP","Noto Sans CJK JP","Hiragino Kaku Gothic ProN","Yu Gothic","Meiryo",sans-serif;
  font-size:18px;
  margin-top:22px;
  margin-bottom:8px;
}

h3{
  font-family:"Noto Sans JP","Noto Sans CJK JP","Hiragino Kaku Gothic ProN","Yu Gothic","Meiryo",sans-serif;
  font-size:16px;
  margin-top:18px;
  margin-bottom:6px;
}

ul,ol{ padding-left:1.35em; }

.box{
  border:1px solid var(--border);
  background:var(--bg2);
  padding:12px 14px;
  border-radius:10px;
  margin:14px 0;
}

.box .box-title{
  font-family:"Noto Sans JP","Noto Sans CJK JP","Hiragino Kaku Gothic ProN","Yu Gothic","Meiryo",sans-serif;
  font-weight:700;
  margin:0 0 6px;
  font-size:13px;
  color:var(--text);
}

.definition{ border-left:5px solid #222; }
.note{ border-left:5px solid #666; }
.example{ border-left:5px solid #0b57d0; }

figure{
  margin:14px 0;
  padding:10px;
  border:1px solid var(--border);
  border-radius:12px;
  background:#fff;
}

figure img{
  width:100%;
  height:auto;
  display:block;
  max-width:760px;
  margin:0 auto;
}

figcaption{
  margin-top:8px;
  color:var(--muted);
  font-size:13px;
}

/* HTMLで描く図（ボックス図など） */
.diagram{
  border:1px solid var(--border);
  border-radius:10px;
  background:#fff;
  padding:10px;
  max-width:760px;
  margin:0 auto;
}

.flow{
  display:flex;
  gap:10px;
  align-items:center;
  justify-content:center;
  flex-wrap:wrap;
}

.node{
  min-width:160px;
  padding:10px 10px;
  border:1px solid var(--border);
  border-radius:10px;
  background:var(--bg2);
  font-family:"Noto Sans JP","Noto Sans CJK JP","Hiragino Kaku Gothic ProN","Yu Gothic","Meiryo",sans-serif;
  font-size:13px;
  text-align:center;
  line-height:1.45;
}

.arrow{
  font-family:"Noto Sans JP","Noto Sans CJK JP","Hiragino Kaku Gothic ProN","Yu Gothic","Meiryo",sans-serif;
  font-size:18px;
  color:var(--muted);
}

.layers{
  display:grid;
  grid-template-rows:auto auto;
  gap:10px;
}

.layers .layer{
  border:1px solid var(--border);
  border-radius:10px;
  padding:10px 10px;
  background:var(--bg2);
}

.layers .layer-title{
  font-family:"Noto Sans JP","Noto Sans CJK JP","Hiragino Kaku Gothic ProN","Yu Gothic","Meiryo",sans-serif;
  font-weight:700;
  font-size:13px;
  margin:0 0 4px;
}

.layers .layer-body{ color:var(--muted); font-size:13px; margin:0; }

.grid2{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:10px;
}

@media (max-width:640px){
  .grid2{ grid-template-columns:1fr; }
}

pre{
  overflow:auto;
  padding:9px 11px;
  background:#fff;
  border:1px solid var(--border);
  border-radius:10px;
  font-size:12px;
  line-height:1.6;
}

code{ font-family:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono","Courier New", monospace; }

table{
  width:100%;
  border-collapse:collapse;
  margin:12px 0;
  font-size:13px;
}

th,td{
  border:1px solid var(--border);
  padding:8px 8px;
  vertical-align:top;
}

footer{
  border-top:1px solid var(--border);
  color:var(--muted);
  font-size:12px;
  padding:10px 16px 14px;
}