:root{
  --surface:#0e1116; --surface-1:#171a21; --surface-2:#21252e; --surface-3:#2b303a;
  --on-surface:#e7e9ee; --on-surface-var:#9aa3b2; --outline:#3a4150; --outline-low:#262b34;
  --primary:#4aa8ff; --primary-container:#2b4d86; --on-primary-container:#d8e2ff;
  --accent:#1d9bf0; --accent-hover:#3aa9f5; --on-accent:#ffffff;
  --secondary-container:#262b34; --on-secondary-container:#e7e9ee; --error:#ff6b6b;
}
*{box-sizing:border-box;}
body{margin:0;color:var(--on-surface);
  background-color:var(--surface);
  background-image:radial-gradient(circle, rgba(154,163,178,.10) 1.1px, transparent 1.2px);
  background-size:23px 23px;background-position:-11px -11px;background-attachment:fixed;
  font-family:"Roboto",-apple-system,"Segoe UI","Hiragino Sans","Meiryo",sans-serif;-webkit-font-smoothing:antialiased;}
a{color:var(--primary);text-decoration:none;} a:hover{text-decoration:underline;}
.muted{color:var(--on-surface-var);font-size:12px;font-weight:400;}

/* ===== 3カラム・アプリシェル（左ナビ／中央／右） ===== */
.app{max-width:1190px;margin:0 auto;display:flex;gap:28px;justify-content:center;align-items:flex-start;padding:0 16px;}
.col-nav{width:218px;flex:none;position:sticky;top:0;height:100vh;overflow-y:auto;display:flex;flex-direction:column;padding:14px 6px 16px;}
.col-main{width:600px;flex:none;min-width:0;padding:14px 0 70px;}
.col-aside{width:300px;flex:none;position:sticky;top:0;height:100vh;overflow-y:auto;padding:14px 0 0;display:flex;flex-direction:column;gap:16px;}

.brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:16px;color:var(--on-surface);padding:8px 12px;margin-bottom:6px;}
.brand:hover{text-decoration:none;}
.navlinks{display:flex;flex-direction:column;gap:2px;}
.navitem{display:flex;align-items:center;gap:14px;padding:11px 12px;border-radius:999px;color:var(--on-surface);font-weight:600;font-size:15px;}
.navitem:hover{background:var(--surface-2);text-decoration:none;}
.navitem.on{font-weight:800;}
.navitem svg{width:23px;height:23px;flex:none;stroke:currentColor;}
.navitem.on svg{stroke:var(--accent);}
.nav-foot{margin-top:auto;display:flex;flex-direction:column;gap:2px;padding:16px 12px 0;}
.nav-foot a{color:var(--on-surface-var);font-size:12px;}

.side-card{background:var(--surface-1);border:1px solid var(--outline-low);border-radius:16px;padding:15px;}
.side-prof{display:flex;align-items:center;gap:11px;}
.side-prof:hover{text-decoration:none;}
.side-id{display:flex;flex-direction:column;min-width:0;}
.side-name{font-weight:800;font-size:14.5px;color:var(--on-surface);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.side-counts{display:flex;gap:16px;margin-top:13px;font-size:12.5px;}
.side-counts a{color:var(--on-surface-var);}
.side-counts a:hover{color:var(--on-surface);text-decoration:none;}
.side-counts b{color:var(--on-surface);font-weight:800;}
.side-card.info .side-h{font-weight:800;font-size:13.5px;margin-bottom:7px;}
.side-card.info p{margin:0;line-height:1.7;}

@media(max-width:1060px){ .col-aside{display:none;} }
@media(max-width:820px){
  .app{gap:8px;padding:0 8px;}
  .col-nav{width:64px;padding:14px 4px;}
  .brand span,.navitem span,.nav-foot{display:none;}
  .brand{justify-content:center;padding:8px 0;font-size:20px;}
  .navitem{justify-content:center;padding:12px 0;}
  .col-main{width:100%;max-width:600px;}
}

h1{font-size:20px;margin:0 0 12px;} h2{font-size:15px;margin:0 0 10px;}
.card{background:var(--surface-1);border:1px solid var(--outline-low);border-radius:16px;padding:16px 18px;margin-bottom:16px;box-shadow:0 1px 3px rgba(0,0,0,.4);}
.note{color:var(--on-surface-var);font-size:12.5px;line-height:1.7;}
.err{color:var(--error);font-size:13px;background:rgba(147,0,10,.18);border:1px solid #93000a;border-radius:10px;padding:10px 13px;}
label{display:block;font-size:13px;color:var(--on-surface-var);margin:0 0 12px;}
input,textarea{display:block;width:100%;margin-top:5px;background:var(--surface-2);color:var(--on-surface);border:1px solid var(--outline-low);border-radius:10px;padding:10px 12px;font-size:14px;font-family:inherit;outline:none;}
input:focus,textarea:focus{border-color:var(--primary);}
button,.btn{display:inline-block;background:var(--secondary-container);color:var(--on-secondary-container);border:1px solid var(--outline-low);border-radius:999px;padding:9px 18px;font-size:13.5px;font-weight:700;cursor:pointer;font-family:inherit;line-height:1.2;}
button.pri,.btn.pri{background:var(--accent);color:var(--on-accent);border-color:var(--accent);}
button.pri:hover,.btn.pri:hover{background:var(--accent-hover);}
.btn.outline,button.outline{background:transparent;color:var(--on-surface);border:1px solid var(--outline);}
.btn.outline:hover,button.outline:hover{background:var(--surface-2);}
button:hover,.btn:hover{filter:none;text-decoration:none;background:var(--surface-3);}
/* フォローボタン */
.ff{display:inline-block;}
.btn.follow{background:var(--accent);color:var(--on-accent);border-color:var(--accent);}
.btn.follow:hover{background:var(--accent-hover);}
.btn.following{background:transparent;color:var(--on-surface);border:1px solid var(--outline);min-width:96px;text-align:center;}
.btn.following:hover{border-color:var(--error);color:var(--error);background:rgba(255,107,107,.08);}
.btn.following:hover span{display:none;}
.btn.following:hover::after{content:attr(data-h);}
/* 招待ロック（解除不可の相互）はホバー変化なし */
.btn.following.locked,.btn.following.locked:hover{border-color:var(--outline);color:var(--on-surface-var);background:transparent;cursor:default;}
.btn.following.locked:hover::after{content:"";}
.profile{text-align:center;}
.profile .avatar{width:72px;height:72px;border-radius:50%;background:var(--primary-container);color:var(--on-primary-container);display:flex;align-items:center;justify-content:center;font-size:32px;font-weight:700;margin:0 auto 10px;text-transform:uppercase;}
.profile .bio{color:var(--on-surface);font-size:14px;line-height:1.7;margin:6px 0;}
.inv{padding:8px 0;border-top:1px solid var(--outline-low);font-size:14px;}
.inv code{background:var(--surface-2);border:1px solid var(--outline-low);border-radius:8px;padding:4px 10px;font-size:14px;letter-spacing:.06em;}
.inv.used{opacity:.6;}
.board{display:flex;gap:14px;padding:12px 0;border-top:1px solid var(--outline-low);align-items:flex-start;}
.board:first-of-type{border-top:0;}
.bthumb{width:120px;height:84px;object-fit:cover;border-radius:10px;background:var(--surface-2);border:1px solid var(--outline-low);display:block;}
.bthumb.noimg{display:flex;align-items:center;justify-content:center;color:var(--on-surface-var);font-size:11px;}
.bmeta{flex:1;min-width:0;}
.bname{font-size:14px;font-weight:600;margin-bottom:2px;word-break:break-word;}
.bact{margin-top:8px;display:flex;gap:8px;align-items:center;flex-wrap:wrap;}
.bact .btn{padding:7px 14px;font-size:13px;}
.bact button{padding:7px 14px;font-size:13px;}
.rep{margin-top:8px;}
.rep summary{display:inline-block;cursor:pointer;color:var(--on-surface-var);font-size:12px;list-style:none;}
.rep summary::-webkit-details-marker{display:none;}
.rep summary:hover{color:var(--error);}
.rep textarea{margin:8px 0;}
.rep button{padding:7px 14px;font-size:13px;}
.flash{background:rgba(43,77,134,.35);border:1px solid var(--primary-container);color:var(--on-surface);border-radius:10px;padding:10px 14px;margin-bottom:14px;font-size:13px;}
.foot{margin-top:28px;padding-top:16px;border-top:1px solid var(--outline-low);text-align:center;color:var(--on-surface-var);font-size:12px;}
.rep-item{padding:12px 0;border-top:1px solid var(--outline-low);font-size:14px;}
.rep-item:first-of-type{border-top:0;}
.rep-item .bact{margin-top:8px;}
.doc h2{margin-top:18px;font-size:15px;}
.doc p{font-size:13.5px;line-height:1.85;color:var(--on-surface);margin:6px 0;}
.doc ul{margin:6px 0;padding-left:20px;}
.doc li{font-size:13.5px;line-height:1.8;margin:4px 0;color:var(--on-surface);}

/* ===== アバター（共通） ===== */
.av{display:inline-flex;align-items:center;justify-content:center;border-radius:50%;color:#fff;font-weight:700;flex:none;text-transform:uppercase;overflow:hidden;}

/* ===== プロフィールヘッダー（バナー＋アバター） ===== */
.pcard{padding:0;overflow:hidden;position:relative;}
.banner{height:130px;width:100%;}
.phead{padding:0 18px 18px;position:relative;}
.pav{margin-top:-42px;margin-bottom:6px;}
.pav .av{border:4px solid var(--surface-1);box-shadow:0 2px 8px rgba(0,0,0,.4);}
.pact{position:absolute;right:16px;top:96px;z-index:2;}
img.av{object-fit:cover;}
.pname{font-size:19px;font-weight:800;margin:2px 0 2px;}
.pbio{font-size:14px;line-height:1.7;color:var(--on-surface);margin:6px 0 10px;white-space:pre-wrap;}
.pcounts{display:flex;gap:18px;font-size:13.5px;color:var(--on-surface-var);margin-top:4px;}
.pcounts a{color:var(--on-surface-var);}
.pcounts a:hover{color:var(--on-surface);text-decoration:none;}
.pcounts b{color:var(--on-surface);font-weight:800;}
/* プロフィールのリンクチップ */
.plinks{display:flex;flex-wrap:wrap;gap:8px;margin:2px 0 12px;}
.plink{display:inline-flex;align-items:center;gap:5px;max-width:100%;background:var(--surface-2);border:1px solid var(--outline-low);color:var(--primary);border-radius:999px;padding:5px 12px;font-size:12.5px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.plink::before{content:"🔗";font-size:11px;}
.plink:hover{background:var(--surface-3);text-decoration:none;}
/* リンク管理（設定） */
.linkrow{display:flex;align-items:center;gap:10px;padding:10px 0;border-top:1px solid var(--outline-low);}
.linkrow:first-of-type{border-top:0;}
.linkrow-t{flex:1;min-width:0;display:flex;flex-direction:column;}
.linkrow-t b{font-size:13.5px;}
.linkrow-t .muted{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.linkrow button{padding:6px 12px;font-size:12.5px;}
.linkadd{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px;align-items:center;}
.linkadd input{width:auto;flex:1;min-width:150px;margin-top:0;}
.linkadd input[name=label]{flex:0 1 190px;}
.linkadd button{padding:9px 16px;}

/* ===== タブ／セクションヘッダー（上部に固定） ===== */
.ptabs{display:flex;gap:4px;margin:0 0 16px;border-bottom:1px solid var(--outline-low);position:sticky;top:0;z-index:5;background:rgba(14,17,22,.82);backdrop-filter:blur(8px);}
.ptabs a,.ptabs span{padding:13px 16px;font-size:14.5px;font-weight:700;color:var(--on-surface-var);border-bottom:2px solid transparent;cursor:pointer;}
.ptabs a:hover{color:var(--on-surface);text-decoration:none;}
.ptabs .on,.ptabs a.on{color:var(--on-surface);border-bottom-color:var(--accent);}
/* セクションの小見出し（例：アカウント設定） */
.sechead{font-size:13px;font-weight:800;color:var(--on-surface-var);letter-spacing:.02em;margin:24px 4px 12px;}

/* ===== タイムライン／ボードカード ===== */
.feed{display:flex;flex-direction:column;gap:16px;}
.feednote{margin-top:16px;text-align:center;}
.bcard{background:var(--surface-1);border:1px solid var(--outline-low);border-radius:16px;padding:16px;box-shadow:0 1px 3px rgba(0,0,0,.35);}
.bcard-h{display:flex;align-items:center;gap:10px;margin-bottom:10px;}
.bcard-u{display:flex;align-items:center;gap:9px;min-width:0;}
.bcard-u:hover{text-decoration:none;}
.bcard-uname{font-weight:700;font-size:14px;color:var(--on-surface);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.bcard-h .muted{margin-left:auto;white-space:nowrap;}
.bcard-name{font-size:14.5px;font-weight:600;margin-bottom:10px;word-break:break-word;}
.bcard-img{display:block;border-radius:13px;overflow:hidden;border:1px solid var(--outline-low);background:var(--surface-2);}
.bcard-img img{display:block;width:100%;max-height:420px;object-fit:cover;}
.bcard-img.noimg{height:120px;display:flex;align-items:center;justify-content:center;color:var(--on-surface-var);font-size:12px;}
.bcard-act{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:12px;}
.bcard-act .btn{padding:8px 16px;font-size:13px;}
.bcard-act button{padding:8px 16px;font-size:13px;}

/* ===== ユーザー一覧（フォロー/フォロワー） ===== */
.listcard{padding:0;overflow:hidden;}
.listhead{display:flex;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid var(--outline-low);}
.listhead .back{font-size:18px;color:var(--on-surface);width:34px;height:34px;display:flex;align-items:center;justify-content:center;border-radius:50%;}
.listhead .back:hover{background:var(--surface-2);text-decoration:none;}
.listtitle{font-size:16px;font-weight:800;}
.listcard .ptabs{margin:0;}
.urow{display:flex;align-items:center;gap:12px;padding:12px 18px;border-bottom:1px solid var(--outline-low);}
.urow:last-child{border-bottom:0;}
.urow-l{display:flex;align-items:center;gap:12px;flex:1;min-width:0;}
.urow-l:hover{text-decoration:none;}
.urow-meta{display:flex;flex-direction:column;min-width:0;}
.urow-name{font-weight:700;font-size:14.5px;color:var(--on-surface);}
.urow-bio{font-size:12.5px;color:var(--on-surface-var);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.urow .btn{padding:7px 14px;font-size:13px;}
.listcard .note{padding:18px;}

/* ===== 画像アップロード（アイコン/ヘッダー） ===== */
.updrow{display:flex;align-items:center;gap:14px;padding:14px 0;border-top:1px solid var(--outline-low);flex-wrap:wrap;}
.updrow:first-of-type{border-top:0;padding-top:6px;}
.upprev{display:flex;flex-direction:column;gap:6px;align-items:flex-start;}
.upprev-l{font-size:11px;color:var(--on-surface-var);}
.upbanner{width:132px;height:44px;border-radius:8px;border:1px solid var(--outline-low);background-size:cover;background-position:center;}
.upform{display:flex;align-items:center;gap:10px;flex-wrap:wrap;flex:1;min-width:200px;}
.upform input[type=file]{flex:1;min-width:150px;font-size:12.5px;padding:8px 10px;}
.upform input[type=file]::-webkit-file-upload-button,.upform input[type=file]::file-selector-button{background:var(--secondary-container);color:var(--on-secondary-container);border:0;border-radius:8px;padding:6px 12px;margin-right:10px;cursor:pointer;font-family:inherit;font-weight:600;}

/* ===== 投稿コンポーザー ===== */
.composer{background:var(--surface-1);border:1px solid var(--outline-low);border-radius:16px;padding:14px 16px;margin-bottom:16px;box-shadow:0 1px 3px rgba(0,0,0,.35);}
.composer-top{display:flex;gap:12px;align-items:flex-start;}
.composer-top textarea{margin-top:0;border:0;background:transparent;padding:9px 4px;font-size:15px;resize:vertical;min-height:44px;}
.composer-top textarea:focus{border:0;outline:none;}
.composer-bar{display:flex;align-items:center;gap:12px;margin-top:10px;padding-top:10px;border-top:1px solid var(--outline-low);}
.composer-bar input[type=file]{width:auto;flex:1;min-width:0;margin-top:0;font-size:12.5px;padding:6px 8px;}
.composer-bar input[type=file]::-webkit-file-upload-button,.composer-bar input[type=file]::file-selector-button{background:var(--secondary-container);color:var(--on-secondary-container);border:0;border-radius:8px;padding:6px 12px;margin-right:8px;cursor:pointer;font-family:inherit;font-weight:600;}
.composer-bar button{margin-left:auto;}

/* ===== 投稿カード ===== */
.post{display:flex;gap:12px;background:var(--surface-1);border:1px solid var(--outline-low);border-radius:16px;padding:14px 16px;box-shadow:0 1px 3px rgba(0,0,0,.35);}
.post-av{flex:none;}
.post-av:hover{text-decoration:none;}
.post-body{flex:1;min-width:0;}
.post-head{display:flex;align-items:center;gap:8px;}
.post-name{font-weight:700;font-size:14.5px;color:var(--on-surface);}
.post-name:hover{text-decoration:none;color:var(--accent);}
.post-text{font-size:14.5px;line-height:1.65;margin:3px 0 0;white-space:pre-wrap;word-break:break-word;}
.post-imgs{display:grid;gap:5px;margin-top:10px;border-radius:14px;overflow:hidden;}
.post-imgs.n2,.post-imgs.n3,.post-imgs.n4{grid-template-columns:1fr 1fr;}
.post-img{display:block;overflow:hidden;background:var(--surface-2);}
.post-img img{display:block;width:100%;height:100%;object-fit:cover;max-height:300px;}
.post-imgs.n1 .post-img img{width:100%;height:auto;max-height:520px;object-fit:contain;}
.post-imgs.n3 .post-img:first-child{grid-row:span 2;}
.post-act{margin-top:9px;display:flex;gap:14px;align-items:center;}
.linklike{background:none;border:0;color:var(--on-surface-var);font-size:12.5px;cursor:pointer;padding:0;font-weight:600;}
.linklike:hover{color:var(--error);text-decoration:underline;}
.post-act .rep{margin-top:0;}
.post-act .rep summary{font-size:12.5px;}

/* ===== ランディング ===== */
.landing .bact{margin-top:14px;}