/* ===== blog-app風テーマ（crimsonアクセント / light・dark） ===== */
:root{
  --bg:#ffffff; --text:#0a0a0a; --softBg:#f0f0f0; --softText:#626262;
  --accent:crimson; --border:#e7e7e7;
}
/* 手動トグル未設定時はOSのダーク設定に追従 */
@media (prefers-color-scheme: dark){
  :root{--bg:#0f172a; --text:#dddddd; --softBg:#1f273a; --softText:#a6a6a6; --border:#28324a;}
}
/* 手動トグル時はクラスで上書き */
html.light{--bg:#ffffff;--text:#0a0a0a;--softBg:#f0f0f0;--softText:#626262;--border:#e7e7e7;}
html.dark{--bg:#0f172a;--text:#dddddd;--softBg:#1f273a;--softText:#a6a6a6;--border:#28324a;}

*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--text);overflow-x:hidden;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Sans","Noto Sans JP",Meiryo,sans-serif;
  line-height:1.7;transition:background .2s,color .2s}
a{color:inherit;text-decoration:none}
.wrapper{max-width:1100px;margin:0 auto;padding:0 40px}
@media (max-width:768px){.wrapper{padding:0 22px}}

/* ---- navbar ---- */
.navbar{display:flex;align-items:center;justify-content:space-between;height:90px}
.nav-left{flex:1}
.nav-logo{flex:2;text-align:center;font-size:30px;font-weight:700;letter-spacing:.01em}
.nav-logo a:hover{color:var(--accent)}
.nav-right{flex:1;display:flex;align-items:center;justify-content:flex-end;gap:18px;font-size:15px}
.nav-right a:hover{color:var(--accent)}
.nav-social{display:inline-flex;align-items:center;font-size:16px;font-weight:700;color:var(--softText)}
.nav-social:hover{color:var(--accent)}
.nav-social svg{display:block}
.theme-toggle{cursor:pointer;border:1px solid var(--border);background:var(--softBg);
  color:var(--text);border-radius:999px;width:40px;height:26px;font-size:14px;line-height:1;
  display:inline-flex;align-items:center;justify-content:center}
@media (max-width:768px){.nav-left{display:none}.nav-logo{text-align:left;font-size:24px}}

/* ---- hero ---- */
.hero{margin:26px 0 10px}
.hero h1{font-size:64px;font-weight:300;line-height:1.15}
.hero p{margin-top:18px;font-size:19px;font-weight:300;color:var(--softText);max-width:680px}
@media (max-width:1024px){.hero h1{font-size:52px}}
@media (max-width:768px){.hero h1{font-size:38px}.hero p{font-size:16px}}

/* ---- category pills ---- */
.cats{display:flex;flex-wrap:wrap;gap:14px;margin:40px 0}
.cat{display:flex;align-items:center;justify-content:center;text-align:center;
  height:64px;min-width:120px;flex:1 1 120px;max-width:180px;border-radius:10px;
  font-weight:600;text-transform:capitalize;color:var(--text)}
.cat:hover{text-decoration:none;opacity:.85}
.cat.c0{background:#57c4ff31}.cat.c1{background:#da85c731}.cat.c2{background:#7fb88133}
.cat.c3{background:#ff795736}.cat.c4{background:#ffb04f45}.cat.c5{background:#5e4fff31}

/* ---- post cards ---- */
.cardlist-title{margin:30px 0 10px;font-size:24px;font-weight:600}
.cards{display:flex;flex-direction:column}
.card{display:flex;gap:30px;align-items:flex-start;
  padding:34px 0;border-bottom:1px solid var(--border)}
.card-text{flex:1;display:flex;flex-direction:column;gap:14px}
.card .date{color:var(--softText);font-size:.86rem}
.card .meta-cat{color:var(--accent);font-weight:600;font-size:.86rem}
.card h2{font-size:1.5rem;line-height:1.35}
.card:hover h2{color:var(--accent)}
.card .desc{color:var(--softText);font-weight:300;font-size:1rem}
.card .more{align-self:flex-start;border-bottom:1px solid var(--accent);
  padding:2px 0;color:var(--text);font-size:.92rem}
.empty{color:var(--softText);padding:40px 0}

/* ---- post page ---- */
.post-wrap{max-width:760px;margin:0 auto}
.back{font-size:.88rem;color:var(--softText)}
.back:hover{color:var(--accent)}
.post-head{margin:18px 0 26px;padding-bottom:20px;border-bottom:1px solid var(--border)}
.post-head .date{color:var(--softText);font-size:.86rem}
.post-head h1{font-size:2.1rem;line-height:1.3;font-weight:300;margin:10px 0 12px}
.post-tags{display:flex;flex-wrap:wrap;gap:8px}
.post-tags a,.post-tags span{font-size:.8rem;color:var(--accent);font-weight:500}
.post-body{font-size:1.05rem}
.post-body h1,.post-body h2,.post-body h3{line-height:1.35;margin:1.8em 0 .6em;font-weight:600}
.post-body h2{border-bottom:1px solid var(--border);padding-bottom:.3em}
.post-body a{color:var(--accent);border-bottom:1px solid transparent}
.post-body a:hover{border-color:var(--accent)}
.post-body img{max-width:100%;height:auto;border-radius:10px}
.post-body blockquote{margin:1em 0;padding:.5em 1.1em;border-left:4px solid var(--accent);
  background:var(--softBg);color:var(--softText);border-radius:0 8px 8px 0}
.post-body table{border-collapse:collapse;width:100%;margin:1em 0;font-size:.95rem}
.post-body th,.post-body td{border:1px solid var(--border);padding:8px 10px;text-align:left}
.post-body th{background:var(--softBg)}
.post-body code{background:var(--softBg);border:1px solid var(--border);border-radius:5px;
  padding:.1em .4em;font-size:.9em}
.post-body pre{background:var(--softBg);border:1px solid var(--border);border-radius:10px;
  padding:14px 16px;overflow:auto;line-height:1.5}
.post-body pre code{background:none;border:none;padding:0}
.codehilite{background:var(--softBg);border:1px solid var(--border);border-radius:10px;
  padding:14px 16px;overflow:auto;margin:1em 0}
.codehilite pre{margin:0;border:none;padding:0;background:none}
.toc{margin:0 0 26px;background:var(--softBg);border:1px solid var(--border);border-radius:10px;padding:6px 16px}
.toc summary{cursor:pointer;font-weight:600;padding:8px 0}

/* ---- footer ---- */
.footer{margin-top:50px;padding:34px 0;border-top:1px solid var(--border);
  color:var(--softText);display:flex;justify-content:space-between;align-items:flex-start;gap:40px;flex-wrap:wrap}
.footer .f-logo{font-size:22px;font-weight:700;color:var(--text)}
.footer .f-desc{font-weight:300;margin-top:8px;max-width:420px}
.footer .f-links{display:flex;gap:60px}
.footer .f-col{display:flex;flex-direction:column;gap:8px;font-weight:300}
.footer .f-col b{color:var(--text)}
@media (max-width:768px){.footer{flex-direction:column;gap:24px}}


/* ---- code highlight (light) ---- */
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td.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
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.codehilite .vm { color: #19177C } /* Name.Variable.Magic */
.codehilite .il { color: #666 } /* Literal.Number.Integer.Long */

/* ---- code highlight (dark via prefers) ---- */
@media (prefers-color-scheme: dark){
pre { line-height: 125%; }
td.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
.codehilite .hll { background-color: #49483e }
.codehilite { background: #272822; color: #F8F8F2 }
.codehilite .c { color: #959077 } /* Comment */
.codehilite .err { color: #ED007E; background-color: #1E0010 } /* Error */
.codehilite .esc { color: #F8F8F2 } /* Escape */
.codehilite .g { color: #F8F8F2 } /* Generic */
.codehilite .k { color: #66D9EF } /* Keyword */
.codehilite .l { color: #AE81FF } /* Literal */
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.codehilite .o { color: #FF4689 } /* Operator */
.codehilite .x { color: #F8F8F2 } /* Other */
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/* ---- code highlight (manual dark) ---- */
html.dark{}