:root{
  --bg:#0f1115; --card:#171a21; --ink:#e8eaed; --muted:#9aa0a6;
  --line:#2a2e37; --brand:#4f9dff; --accent:#2bd4a4;
  --danger:#ff5c5c; --draft:#c9a227;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,"Segoe UI","Hiragino Kaku Gothic ProN","Noto Sans JP",sans-serif;
  line-height:1.8;font-size:16px}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
code{background:#0b0d11;padding:1px 6px;border-radius:4px;font-size:.9em;color:#e6c07b}

.site-header{display:flex;justify-content:space-between;align-items:center;
  padding:14px 20px;border-bottom:1px solid var(--line);background:#12141a;position:sticky;top:0;z-index:5}
.brand{font-weight:700;font-size:1.15rem;color:var(--ink)}
.site-header nav a{margin-left:16px;color:var(--muted)}
.wrap{max-width:820px;margin:0 auto;padding:28px 20px 60px}
.site-footer{border-top:1px solid var(--line);padding:24px 20px;color:var(--muted);font-size:.85rem;text-align:center}

.page-title{font-size:1.5rem;margin:0 0 20px}

/* 記事 */
.post h1{font-size:1.9rem;line-height:1.4;margin:0 0 24px}
.post-body h2{font-size:1.35rem;margin:38px 0 14px;padding-bottom:8px;border-bottom:2px solid var(--brand)}
.post-body h3{font-size:1.12rem;margin:26px 0 10px;color:var(--accent)}
.post-body p{margin:0 0 18px}
.post-figure{margin:22px 0;text-align:center}
.post-figure img{max-width:100%;height:auto;border-radius:10px;border:1px solid var(--line)}
.post-figure figcaption{margin-top:8px;color:var(--muted);font-size:.9rem}
.post-figure.placeholder .ph-box{border:2px dashed var(--line);border-radius:10px;
  padding:48px 12px;color:var(--muted);background:#0c0e13}
.post-note{margin-top:36px;padding:14px 16px;border-left:3px solid var(--draft);
  background:#1b1a12;color:#d8cfa6;font-size:.9rem;border-radius:6px}

.breadcrumb{font-size:.82rem;color:var(--muted);margin-bottom:16px}
.breadcrumb span{margin:0 4px}
.draft-banner{background:#2a2412;border:1px solid var(--draft);color:#e6d493;
  padding:10px 14px;border-radius:8px;margin-bottom:18px;font-size:.88rem}
.faq{margin-top:40px;border-top:1px solid var(--line);padding-top:24px}
.faq h2{font-size:1.3rem;margin:0 0 14px}
.faq details{border:1px solid var(--line);border-radius:8px;padding:12px 14px;margin-bottom:10px;background:var(--card)}
.faq summary{cursor:pointer;font-weight:600}
.faq details p{margin:10px 0 0;color:#cfd3d8}
.related{margin-top:34px;padding:18px 20px;background:var(--card);border:1px solid var(--line);border-radius:12px}
.related h2{font-size:1.15rem;margin:0 0 12px}
.related ul{margin:0;padding-left:18px}
.related li{margin:6px 0}

.post-list{list-style:none;padding:0}
.post-list li{padding:16px 0;border-bottom:1px solid var(--line)}
.post-list a{font-size:1.15rem;font-weight:600}
.post-list .excerpt{margin:6px 0;color:var(--muted);font-size:.92rem}
.post-list .date{color:var(--muted);font-size:.8rem}

/* 管理 */
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;margin-bottom:22px}
.card h2{margin:0 0 14px;font-size:1.15rem}
.inline-form{display:flex;gap:10px;flex-wrap:wrap}
.inline-form input[type=text]{flex:1;min-width:220px}
input,textarea,select{width:100%;background:#0b0d11;border:1px solid var(--line);color:var(--ink);
  border-radius:8px;padding:10px 12px;font-size:.95rem;font-family:inherit}
textarea.mono{font-family:"Consolas","Courier New",monospace;font-size:.88rem;line-height:1.6}
label{display:block;margin:0 0 14px;font-size:.9rem;color:var(--muted)}
label input,label textarea{margin-top:6px}
.checkbox-row{display:flex;align-items:center;gap:8px}
.checkbox-row input{width:auto}
button{cursor:pointer;background:var(--brand);color:#04101f;border:none;border-radius:8px;
  padding:10px 16px;font-weight:600;font-size:.92rem}
button:hover{filter:brightness(1.08)}
.btn-primary{background:var(--accent);color:#062018;font-size:1rem;padding:12px 22px}
.btn-secondary{display:inline-block;background:transparent;border:1px solid var(--line);
  color:var(--ink);padding:8px 14px;border-radius:8px;font-size:.85rem}
.btn-danger{background:var(--danger);color:#210606}
.link-btn{background:transparent;color:var(--brand);padding:4px 6px;font-weight:500}
.danger-form{margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}
.help{color:var(--muted);font-size:.82rem;margin:10px 0}

.admin-table{width:100%;border-collapse:collapse;font-size:.9rem}
.admin-table th,.admin-table td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line)}
.admin-table th{color:var(--muted);font-weight:600}
.row-actions{display:flex;gap:10px;align-items:center}
.pub{color:var(--accent)} .draft{color:var(--draft)}

.edit-head{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px}
.edit-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
@media(max-width:900px){.edit-grid{grid-template-columns:1fr}}
.add-slot{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:18px;
  padding-bottom:16px;border-bottom:1px solid var(--line)}
.add-slot input[type=text]{flex:1;min-width:140px}
.slots{display:flex;flex-direction:column;gap:16px}
.slot{border:1px solid var(--line);border-radius:10px;padding:14px;background:#0e1015}
.slot-head{font-weight:600;margin-bottom:10px;display:flex;gap:10px;align-items:center}
.slot-thumb{max-width:100%;max-height:220px;border-radius:8px;border:1px solid var(--line);display:block;margin-bottom:10px}
.slot-empty{color:var(--muted);border:2px dashed var(--line);border-radius:8px;padding:24px;text-align:center;margin-bottom:10px}
.slot-upload,.slot-caption{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:8px}
.slot-upload input[type=text],.slot-caption input{flex:1;min-width:120px}