/* ------------------------------
 Base
------------------------------ */
:root{
--bg: #ffffff;
--text: #111111;
--muted: #555555;
--border: #e6e6e6;
--surface: #f7f7f7;
--link: #0b57d0;
--maxw: 700px;
--radius: 10px;
--shadow: 0 1px 8px rgba(0,0,0,.06);
}
*{ box-sizing: border-box; }
html{ -webkit-text-size-adjust: 100%; }
body{
margin: 0;
background: var(--bg);
color: var(--text);
font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
line-height: 1.8;
}
a{
color: var(--link);
text-decoration: underline;
text-underline-offset: .18em;
}
a:hover{ text-decoration-thickness: 2px; }
img{
max-width: 100%;
height: auto;
}
/* ------------------------------
 Layout (1 column)
------------------------------ */
.wrap{
min-height: 100svh;
display: flex;
flex-direction: column;
}
header, main, footer{
width: 100%;
}
.container{
width: 100%;
max-width: var(--maxw);
margin: 0 auto;
padding: 0 16px;
}
header{
border-bottom: 1px solid var(--border);
background: var(--bg);
}
header .container{
padding-top: 18px;
padding-bottom: 14px;
}
header h1{
margin: 0;
font-size: clamp(20px, 3.2vw, 28px);
line-height: 1.35;
letter-spacing: .02em;
}
main{
flex: 1;
padding: 18px 0 28px;
}
footer{
border-top: 1px solid var(--border);
background: var(--surface);
padding: 16px 0;
}
/* ------------------------------
 Content styling (no classes on tags)
------------------------------ */
main .content{
background: var(--bg);
}
/* Paragraph spacing */
main p{
margin: 0 0 1em;
}
main p + p{
margin-top: .9em;
}
/* Headings */
main h2, main h3, main h4{
margin: 1.4em 0 .6em;
line-height: 1.35;
letter-spacing: .02em;
}
main h2{
font-size: 1.35rem;
padding: .55em .75em;
background: var(--surface);
border: 1px solid var(--border);
border-left: 4px solid #333333;
border-radius: var(--radius);
}
main h3{
font-size: 1.18rem;
padding-bottom: .25em;
border-bottom: 1px solid var(--border);
}
main h4{
font-size: 1.05rem;
color: var(--muted);
}
/* Lists */
main ul, main ol{
padding-left: 1.3em;
margin: .6em 0 1.1em;
}
main li{
margin: .35em 0;
}
/* Tables */
main table{
width: 100%;
border-collapse: collapse;
border: 1px solid var(--border);
border-radius: var(--radius);
overflow: hidden; /* for rounded corners */
margin: 1em 0 1.2em;
background: var(--bg);
}
main thead th{
background: var(--surface);
text-align: left;
font-weight: 600;
}
main th, main td{
border-bottom: 1px solid var(--border);
padding: 10px 12px;
vertical-align: top;
}
main tr:last-child td{
border-bottom: none;
}
/* Content images center align by default */
main img{
display: block;
margin: 14px auto;
}
/* Blockquote (optional but useful) */
main blockquote{
margin: 1.1em 0;
padding: .8em 1em;
background: var(--surface);
border-left: 4px solid #333333;
border-radius: var(--radius);
color: var(--muted);
}
/* Code (optional) */
main code{
font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
font-size: .95em;
background: var(--surface);
padding: .15em .35em;
border: 1px solid var(--border);
border-radius: 6px;
}
main pre{
margin: 1.1em 0;
padding: 12px 14px;
background: var(--surface);
border: 1px solid var(--border);
border-radius: var(--radius);
overflow: auto;
}
main pre code{
background: transparent;
border: none;
padding: 0;
}
/* ------------------------------
 Footer menu (inline, responsive)
------------------------------ */
footer nav ul{
list-style: none;
padding: 0;
margin: 0;
display: flex;
flex-wrap: wrap;
gap: 10px 14px;
justify-content: center;
align-items: center;
}
footer nav a{
display: inline-block;
padding: 8px 10px;
border: 1px solid var(--border);
border-radius: 999px;
text-decoration: none;
color: var(--text);
background: #ffffff;
}
footer nav a:hover{
box-shadow: var(--shadow);
}
footer .small{
margin-top: 12px;
text-align: center;
color: var(--muted);
font-size: .92rem;
}
/* ------------------------------
 Small screen adjustments
------------------------------ */
@media (max-width: 480px){
header .container{
padding-top: 16px;
padding-bottom: 12px;
}
main{
padding-top: 14px;
}
main th, main td{
padding: 9px 10px;
}
footer nav a{
padding: 8px 12px;
}
}