:root{--bg:#f6f8f8;--card:#fff;--ink:#1c2626;--sub:#5b6a6a;--line:#dbe4e4;--acc:#14938a;--acc-ink:#fff;--acc-soft:#e0f4f2;--like:#e0426b;--danger:#c0392b;--shadow:0 1px 3px rgba(20,40,40,.12);color-scheme:light}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#10171a;--card:#182226;--ink:#e8f0f0;--sub:#9fb2b2;--line:#2a3a3e;--acc:#3cc6bb;--acc-ink:#062320;--acc-soft:#173a38;--like:#ff6d92;--danger:#ff7a6b;--shadow:0 1px 3px rgba(0,0,0,.5);color-scheme:dark}}
:root[data-theme="dark"]{--bg:#10171a;--card:#182226;--ink:#e8f0f0;--sub:#9fb2b2;--line:#2a3a3e;--acc:#3cc6bb;--acc-ink:#062320;--acc-soft:#173a38;--like:#ff6d92;--danger:#ff7a6b;--shadow:0 1px 3px rgba(0,0,0,.5);color-scheme:dark}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 system-ui,-apple-system,"Hiragino Sans","Noto Sans JP","Yu Gothic UI",Meiryo,sans-serif;min-height:100vh;display:flex;flex-direction:column}
a{color:var(--acc)}
img{max-width:100%}
.top{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap;padding:10px 16px;background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--ink);text-decoration:none;font-size:17px}
.logo{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:8px;background:var(--acc-soft)}
#nav{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
main{flex:1;width:100%;max-width:1180px;margin:0 auto;padding:16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:40px;padding:6px 16px;border-radius:999px;border:1px solid var(--line);background:var(--card);color:var(--ink);font:inherit;font-size:15px;cursor:pointer;text-decoration:none}
.btn:hover{border-color:var(--acc)}
.btn.pri{background:var(--acc);color:var(--acc-ink);border-color:var(--acc);font-weight:700}
.btn.danger{color:var(--danger);border-color:var(--danger)}
.btn.sm{min-height:34px;padding:2px 12px;font-size:14px}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.tabs{display:flex;gap:8px;margin:0 0 14px;flex-wrap:wrap;align-items:center}
.tab{padding:6px 16px;border-radius:999px;border:1px solid var(--line);background:var(--card);color:var(--ink);font:inherit;cursor:pointer;min-height:40px}
.tab.on{background:var(--acc);color:var(--acc-ink);border-color:var(--acc);font-weight:700}
.chip{display:inline-flex;gap:6px;align-items:center;padding:4px 12px;border-radius:999px;background:var(--acc-soft);font-size:14px}
.grid{column-width:240px;column-gap:12px}
.card{break-inside:avoid;margin:0 0 12px;background:var(--card);border-radius:12px;box-shadow:var(--shadow);overflow:hidden;position:relative}
.card a.im{display:block;background:var(--acc-soft)}
.card img{display:block;width:100%;height:auto}
.card .meta{display:flex;align-items:center;justify-content:space-between;gap:6px;padding:8px 10px;font-size:14px}
.card .by{color:var(--sub);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}
.card .ttl{padding:8px 10px 0;font-weight:700;font-size:15px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.like{display:inline-flex;align-items:center;gap:4px;border:1px solid var(--line);background:var(--card);color:var(--sub);border-radius:999px;padding:2px 12px;min-height:34px;font:inherit;font-size:14px;cursor:pointer}
.like.on{color:var(--like);border-color:var(--like)}
.like:hover{border-color:var(--like)}
.badge{position:absolute;top:8px;left:8px;background:rgba(0,0,0,.65);color:#fff;border-radius:8px;padding:2px 8px;font-size:12px}
.more{text-align:center;margin:18px 0}
.empty{text-align:center;color:var(--sub);padding:40px 12px}
.panel{background:var(--card);border-radius:14px;box-shadow:var(--shadow);padding:20px;margin:0 0 16px}
.panel.narrow{max-width:560px;margin-left:auto;margin-right:auto}
h1{font-size:22px;margin:4px 0 12px}
h2{font-size:18px;margin:20px 0 8px}
label.f{display:block;margin:12px 0 4px;font-weight:700;font-size:14px}
input[type=text],input[type=email],textarea,select{width:100%;font:inherit;font-size:16px;padding:8px 12px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--ink)}
textarea{min-height:84px;resize:vertical}
.ck{display:flex;gap:8px;align-items:flex-start;margin:10px 0;font-size:14px;line-height:1.5}
.ck input{margin-top:4px;width:18px;height:18px;flex:none}
.hint{color:var(--sub);font-size:13px}
.err{color:var(--danger);font-size:14px;min-height:1.2em;margin:8px 0}
.preview{margin:10px 0;border-radius:10px;max-height:300px;overflow:hidden;background:var(--acc-soft);text-align:center}
.preview img{max-height:300px;object-fit:contain}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.72);z-index:50;overflow-y:auto;padding:12px;display:flex;align-items:flex-start;justify-content:center}
.modal[hidden]{display:none}
.sheet{background:var(--card);border-radius:14px;width:100%;max-width:1000px;margin:8px auto;position:relative;overflow:hidden}
.sheet .x{position:absolute;top:8px;right:8px;z-index:2;width:40px;height:40px;border-radius:50%;border:0;background:rgba(0,0,0,.55);color:#fff;font-size:22px;cursor:pointer}
.sheet .big{background:#000;text-align:center}
.sheet .big img{display:block;margin:0 auto;max-height:76vh;width:auto;max-width:100%;height:auto}
.sheet .info{padding:14px 18px 18px}
.sheet h2{margin:0 0 4px;font-size:20px}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin:10px 0}
.cap{white-space:pre-wrap;overflow-wrap:anywhere}
.toast{position:fixed;left:50%;bottom:20px;transform:translateX(-50%);background:#222;color:#fff;padding:10px 18px;border-radius:999px;z-index:80;max-width:90vw;font-size:14px}
.toast[hidden]{display:none}
.foot{max-width:1180px;margin:0 auto;padding:20px 16px 40px;color:var(--sub);font-size:13px;width:100%}
.foot p{margin:4px 0}
.doc{max-width:760px;margin:0 auto;background:var(--card);border-radius:14px;box-shadow:var(--shadow);padding:20px 22px}
.doc h1{font-size:24px}
.doc h2{font-size:18px;border-left:4px solid var(--acc);padding-left:10px;margin-top:26px}
.doc li{margin:4px 0}
.doc .note{background:var(--acc-soft);border-radius:10px;padding:10px 14px;font-size:14px}
.adm{display:grid;grid-template-columns:140px 1fr;gap:12px;margin:0 0 14px}
.adm img{width:140px;border-radius:8px}
@media (max-width:640px){main{padding:12px}.grid{column-width:150px;column-gap:8px}.card{margin-bottom:8px}.card .meta{padding:6px 8px}.sheet .info{padding:12px}.adm{grid-template-columns:90px 1fr}.adm img{width:90px}.brand span:last-child{font-size:15px}.panel{padding:16px}.doc{padding:16px}}
.tbl{width:100%;border-collapse:collapse;font-size:14px;margin:8px 0}
.tbl th,.tbl td{border:1px solid var(--line);padding:6px 8px;text-align:left;vertical-align:top}
.tbl th{background:var(--acc-soft)}
@media (max-width:640px){.tbl{display:block;overflow-x:auto}}