*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,'Segoe UI',Roboto,Arial,Helvetica,sans-serif;font-size:14px;background:var(--bg);color:var(--fg);transition:background .15s,color .15s}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}

[data-theme="modern"]{--bg:#f5f6f8;--fg:#1b1e25;--bar:#2c3446;--bar-fg:#fff;--post-bg:#ffffff;--post-border:#e2e5eb;--quote:#3d8b5f;--link:#2b5fc7;--input-bg:#fff;--muted:#767c8a;--accent:#e0663d;--radius:10px;--shadow:0 1px 3px rgba(20,22,30,.08)}
[data-theme="yotsuba"]{--bg:#ffffee;--fg:#800000;--bar:#ff8000;--bar-fg:#fff;--post-bg:#f0e0d6;--post-border:#d9bfb7;--quote:#789922;--link:#34345c;--input-bg:#fff;--muted:#707070;--accent:#ff8000;--radius:4px;--shadow:none}
[data-theme="yotsuba-b"]{--bg:#eef2ff;--fg:#0f0c5d;--bar:#8b98d8;--bar-fg:#fff;--post-bg:#d6daf0;--post-border:#b7c5d9;--quote:#789922;--link:#34345c;--input-bg:#fff;--muted:#707070;--accent:#8b98d8;--radius:4px;--shadow:none}
[data-theme="futaba"]{--bg:#ffffee;--fg:#aa0000;--bar:#f0c8c0;--bar-fg:#800000;--post-bg:#f0e0d6;--post-border:#d9bfb7;--quote:#789922;--link:#0000ee;--input-bg:#fff;--muted:#707070;--accent:#aa0000;--radius:4px;--shadow:none}
[data-theme="tomorrow"]{--bg:#1d1f21;--fg:#c5c8c6;--bar:#282a2e;--bar-fg:#c5c8c6;--post-bg:#282a2e;--post-border:#373b41;--quote:#b5bd68;--link:#81a2be;--input-bg:#141414;--muted:#969896;--accent:#cc6666;--radius:8px;--shadow:0 1px 4px rgba(0,0,0,.4)}

header.topbar{background:var(--bar);color:var(--bar-fg);padding:10px 16px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;position:sticky;top:0;z-index:40;box-shadow:var(--shadow)}
header.topbar h1{margin:0;font-size:19px;letter-spacing:.2px}
header.topbar h1 a{color:inherit}
.board-nav{display:flex;gap:10px;flex-wrap:wrap;font-size:12px}
.board-nav a{color:var(--bar-fg);opacity:.9}
.board-nav a:hover{opacity:1}
select#themeSelect{font-size:12px;padding:4px 6px;border-radius:6px;border:none}
.search-form{display:flex;gap:4px}
.search-form input{padding:6px 10px;border-radius:6px;border:1px solid var(--post-border);font-size:12px;min-width:160px}
.search-form button{padding:6px 10px;border-radius:6px;border:none;background:var(--accent);color:#fff;font-size:12px;cursor:pointer}

main{max-width:960px;margin:0 auto;padding:14px}
.board-title{text-align:center;margin:16px 0 4px;font-size:28px;color:var(--fg);font-weight:800}
.board-desc{text-align:center;color:var(--muted);margin-bottom:16px}
.section-title{margin:24px 0 10px;font-size:16px}

.board-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.board-card{border:1px solid var(--post-border);background:var(--post-bg);padding:16px;text-align:center;border-radius:var(--radius);box-shadow:var(--shadow)}
.board-card a{font-weight:700;font-size:15px}
.board-card p{margin:6px 0 0;color:var(--muted);font-size:11px}

.postform{border:1px solid var(--post-border);background:var(--post-bg);padding:14px;margin-bottom:18px;border-radius:var(--radius);box-shadow:var(--shadow)}
.form-row{display:flex;flex-direction:column;gap:5px;margin-bottom:12px}
.form-row label{color:var(--fg);font-weight:700;font-size:12px}
.form-row input[type=text],.form-row input[type=url],.form-row textarea{width:100%;background:var(--input-bg);color:var(--fg);border:1px solid var(--post-border);border-radius:8px;padding:10px;font-family:inherit;font-size:16px}
.form-row textarea{min-height:110px;resize:vertical}
.form-row-inline{flex-direction:row;align-items:center}
.checkbox-label{display:flex;align-items:center;gap:6px;font-weight:400 !important;font-size:13px !important}
.checkbox-label input{width:18px;height:18px}
.form-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.postform button{background:var(--accent);color:#fff;border:none;border-radius:8px;padding:12px 22px;cursor:pointer;font-weight:700;font-size:15px;flex:1 1 auto;min-width:120px}
.postform .err{color:#d33;font-size:12px;margin-top:8px}
.postform .hint{font-size:11px;color:var(--muted)}
.charcount{font-size:10px;color:var(--muted);text-align:right}

.catalog-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px}
.thread-tile{border:1px solid var(--post-border);background:var(--post-bg);padding:8px;font-size:12px;border-radius:var(--radius);cursor:pointer;box-shadow:var(--shadow);transition:transform .1s}
.thread-tile:hover{transform:translateY(-2px)}
.thread-tile img,.thread-tile video{max-width:100%;max-height:150px;display:block;margin-bottom:5px;object-fit:cover;border-radius:6px}
.thread-tile .meta{color:var(--muted);font-size:10px;margin-bottom:3px}
.thread-tile .subject,.search-result .subject{font-weight:700;font-size:12px;margin-bottom:2px}
.thread-tile .snippet{max-height:60px;overflow:hidden}
.thread-subject{margin:0 0 8px;font-size:20px;font-weight:800}
.pin-badge{color:var(--accent);font-weight:700;font-size:10px}

.post{border:1px solid var(--post-border);background:var(--post-bg);padding:10px 12px;margin-bottom:9px;border-radius:var(--radius);box-shadow:var(--shadow);transition:outline .1s}
.post.op{background:transparent;border:none;box-shadow:none;padding:4px 0 10px}
.post.post-highlight{outline:2px solid var(--accent)}
.post .postinfo{font-size:12px;margin-bottom:5px;display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.post .postinfo .name{color:#117743;font-weight:700}
.post .postinfo .trip{color:#228}
.post .postinfo .num{color:var(--muted)}
.post .postinfo a.postnum-link{color:var(--muted)}
.post .postinfo a.reply-link{font-size:11px}
.poster-id{font-family:monospace;font-size:10px;color:#fff;padding:1px 6px;border-radius:10px;cursor:pointer}
.poster-id.id-highlight{outline:2px solid #fff;outline-offset:1px}
.post .comment{white-space:pre-wrap;word-wrap:break-word;line-height:1.45}
.post .comment .quote{color:var(--quote)}
.post .comment .greentext{color:var(--quote)}
.post img.media,.post video.media{max-width:280px;max-height:280px;float:left;margin:0 12px 8px 0;border-radius:8px}
.post::after{content:"";display:table;clear:both}
.yt-embed{max-width:400px;aspect-ratio:16/9;border-radius:8px}

.quote-preview{position:absolute;border:1px solid var(--post-border);background:var(--post-bg);padding:10px;max-width:320px;box-shadow:0 4px 14px rgba(0,0,0,.25);z-index:50;border-radius:var(--radius)}

.search-list{display:flex;flex-direction:column;gap:8px}
.search-result{display:block;border:1px solid var(--post-border);background:var(--post-bg);padding:10px;border-radius:var(--radius);box-shadow:var(--shadow);color:var(--fg)}
.search-result:hover{text-decoration:none;outline:1px solid var(--accent)}
.search-result .meta{color:var(--muted);font-size:11px;margin-bottom:4px}

.stats-box{display:flex;align-items:center;gap:8px;justify-content:center;font-size:11px;color:var(--muted);flex-wrap:wrap;margin-bottom:6px}
.pulse-dot{width:8px;height:8px;border-radius:50%;background:#2a7;box-shadow:0 0 0 rgba(42,170,119,.5);animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(42,170,119,.5)}70%{box-shadow:0 0 0 6px rgba(42,170,119,0)}100%{box-shadow:0 0 0 0 rgba(42,170,119,0)}}
.footer-links{font-size:11px}

.board-banner-img{display:block;max-width:100%;max-height:200px;margin:10px auto;border-radius:var(--radius);box-shadow:var(--shadow)}
.board-quote{text-align:center;font-style:italic;color:var(--muted);font-size:12px;margin:-6px 0 14px}

footer{text-align:center;color:var(--muted);font-size:11px;padding:16px}
.back-link{display:inline-block;margin-bottom:10px;font-size:12px}
.thread-nav{display:flex;gap:14px;font-size:12px;font-weight:700;margin-bottom:10px;padding:6px 0}
.thread-nav a{color:var(--link)}

@media(max-width:640px){
  header.topbar{gap:6px}
  .search-form input{min-width:0;flex:1}
  .board-grid{grid-template-columns:repeat(auto-fill,minmax(120px,1fr))}
  .catalog-grid{grid-template-columns:repeat(auto-fill,minmax(130px,1fr))}
  .post img.media,.post video.media{max-width:100%;float:none}
  .postinfo{font-size:11px}
  .form-actions{flex-direction:column;align-items:stretch}
  .postform button{width:100%}
  .thread-nav{font-size:11px;gap:10px}
}