/* Layout: 3-pane workspace — dark green channel rail / message feed / thread drawer. Collapses to one pane + drawers on phones. */
:root{
  --bg:#F3F6F4; --panel:#FFFFFF; --fg:#16201D; --muted:#5C6B66; --line:#DDE5E1; --line-strong:#C4D1CB; --hover:#F1F6F3;
  --side:#173A31; --side-fg:#CFE2DA; --side-muted:#8DAEA2; --side-hover:#21493E; --side-active:#2E8068; --side-on:#FFFFFF; --side-line:#24493F; --side-strong:#FFFFFF;
  --accent:#1E7A62; --accent-fg:#FFFFFF; --accent-soft:#E0F1EA; --dot:#7FE0BE;
  --danger:#B3261E; --hl:#FFF3BF; --shadow:0 4px 16px rgba(18,40,33,.12); --scrim:rgba(10,20,17,.45);
  --f-body:"IBM Plex Sans JP","Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP",system-ui,sans-serif;
  --f-disp:"Zen Maru Gothic","Hiragino Maru Gothic ProN","IBM Plex Sans JP",sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){:root{
  --bg:#0E1513; --panel:#131C19; --fg:#E2EBE7; --muted:#93A59F; --line:#24322D; --line-strong:#33453F; --hover:#18231F;
  --side:#0A110F; --side-fg:#C3D6CE; --side-muted:#7C978D; --side-hover:#15211D; --side-active:#2A735E; --side-line:#1A2622;
  --accent:#4FC39F; --accent-fg:#06140F; --accent-soft:#17322A; --dot:#6FD9B4;
  --danger:#F28B82; --hl:#3B3517; --shadow:0 4px 18px rgba(0,0,0,.5); --scrim:rgba(0,0,0,.6); color-scheme:dark}}

html{height:100%;box-sizing:border-box}
*,*::before,*::after{box-sizing:border-box}
body{height:100%;margin:0;background:var(--bg);color:var(--fg);font-family:var(--f-body);font-size:15px;line-height:1.6;overflow:hidden;-webkit-text-size-adjust:100%}
[hidden]{display:none!important}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important}}

/* auth */
#auth{position:fixed;inset:0;background:var(--side);display:grid;place-items:center;padding:16px;padding-top:max(16px,env(safe-area-inset-top));overflow:auto}
.auth-card{background:var(--panel);border-radius:16px;box-shadow:var(--shadow);width:min(400px,100%);padding:24px}
.auth-brand{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.auth-brand .ws-name{color:var(--fg)}
.auth-sub{font-size:12px;color:var(--muted)}
.auth-card h2{font-family:var(--f-disp);font-size:20px;margin:0 0 4px}
.auth-card .lead{color:var(--muted);font-size:13.5px;margin:0 0 16px}
.auth-card .btn.pri{width:100%;padding:10px}
.auth-err{color:var(--danger);font-size:13.5px;margin:0 0 10px}
.auth-note{font-size:12.5px;color:var(--muted);margin-top:14px}

#app{height:100%;display:grid;grid-template-columns:264px minmax(0,1fr);padding-top:env(safe-area-inset-top,0px)}
#app.has-thread{grid-template-columns:264px minmax(0,1fr) minmax(300px,380px)}

/* sidebar */
#side{background:var(--side);color:var(--side-fg);display:flex;flex-direction:column;min-height:0}
.ws{padding:16px 16px 12px;border-bottom:1px solid var(--side-line);display:flex;align-items:center;gap:10px}
.ws-mark{width:34px;height:34px;border-radius:9px;background:var(--side-active);color:var(--side-on);display:grid;place-items:center;font-family:var(--f-disp);font-size:18px;flex:none}
.ws-name{font-family:var(--f-disp);font-weight:700;font-size:17px;color:var(--side-strong);line-height:1.25}
.ws-sub{font-size:11.5px;color:var(--side-muted);letter-spacing:.04em}
.side-search{margin:12px 12px 4px;display:flex;align-items:center;gap:8px;width:calc(100% - 24px);background:var(--side-hover);border:0;border-radius:7px;padding:6px 10px;color:var(--side-muted);cursor:pointer;font-size:13px;text-align:left}
.side-scroll{flex:1;overflow-y:auto;padding:4px 8px 16px}
.grp-h{font-size:11.5px;font-weight:700;letter-spacing:.08em;color:var(--side-muted);padding:14px 10px 4px}
.ch{display:flex;align-items:center;gap:7px;width:100%;border:0;background:none;color:inherit;padding:6px 10px;border-radius:6px;cursor:pointer;text-align:left;font-size:14.5px}
.ch:hover{background:var(--side-hover)}
.ch.on{background:var(--side-active);color:var(--side-on)}
.ch .hash{opacity:.55;font-weight:500;width:12px;flex:none}
.ch .nm{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ch.unread .nm{font-weight:700;color:var(--side-strong)}
.ch .dot{margin-left:auto;width:8px;height:8px;border-radius:50%;background:var(--dot);flex:none}
.side-add{display:flex;align-items:center;gap:7px;width:100%;border:0;background:none;color:var(--side-muted);padding:6px 10px;border-radius:6px;cursor:pointer;font-size:14px;margin-top:6px}
.side-add:hover{background:var(--side-hover);color:var(--side-fg)}
.arch-t{border:0;background:none;color:var(--side-muted);font-size:11.5px;font-weight:700;letter-spacing:.08em;padding:14px 10px 4px;cursor:pointer}
.side-foot{border-top:1px solid var(--side-line);padding:10px 12px calc(10px + env(safe-area-inset-bottom,0px));display:flex;flex-direction:column;gap:2px}
.me-btn{display:flex;align-items:center;gap:9px;border:0;background:none;padding:6px;border-radius:8px;cursor:pointer;text-align:left;width:100%}
.me-btn:hover{background:var(--side-hover)}
.me-btn .nm{font-weight:700;color:var(--side-strong);font-size:14px}
.me-btn .sub{font-size:11.5px;color:var(--side-muted)}
.foot-link{display:block;border:0;background:none;color:var(--side-muted);font-size:12.5px;text-align:left;padding:5px 6px;cursor:pointer;border-radius:6px;text-decoration:none}
.foot-link:hover{color:var(--side-fg);background:var(--side-hover)}

/* main */
#main,#thread{display:flex;flex-direction:column;min-width:0;min-height:0;background:var(--panel)}
.top{display:flex;align-items:center;gap:8px;padding:8px 16px;border-bottom:1px solid var(--line);min-height:58px}
.top-txt{min-width:0;flex:1}
.top h1,.top h2{font-family:var(--f-disp);font-size:18px;margin:0;line-height:1.3;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.top h2{font-size:16px}
.top .desc,.top .sub{color:var(--muted);font-size:12.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ibtn{position:relative;border:1px solid transparent;background:none;border-radius:8px;padding:6px 9px;cursor:pointer;color:var(--muted);font-size:13px;display:inline-flex;align-items:center;gap:5px;flex:none}
.ibtn:hover{background:var(--hover);color:var(--fg)}
.ibtn svg{width:18px;height:18px}
.menu-btn{display:none}
.menu-dot{position:absolute;top:5px;right:5px;width:8px;height:8px;border-radius:50%;background:var(--accent)}
.feed{flex:1;overflow-y:auto;padding:6px 0 12px;overscroll-behavior:contain;-webkit-overflow-scrolling:touch}
.feed-note{color:var(--muted);text-align:center;padding:32px 16px;font-size:14px}
.older{display:block;margin:10px auto 4px;border:1px solid var(--line);background:var(--panel);border-radius:999px;padding:5px 14px;color:var(--muted);font-size:12.5px;cursor:pointer}
.older:hover{color:var(--fg);border-color:var(--line-strong)}
.empty{margin:auto;max-width:420px;padding:40px 16px;text-align:center}
.empty h3{font-family:var(--f-disp);font-size:20px;margin:0 0 6px;text-wrap:balance}
.empty p{color:var(--muted);margin:0 0 16px;font-size:14px}
.chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.chip{border:1px solid var(--line-strong);background:var(--panel);border-radius:999px;padding:6px 14px;cursor:pointer;font-size:14px}
.chip:hover{border-color:var(--accent);background:var(--accent-soft)}
.banner{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:10px 16px 0;padding:10px 12px;border-radius:10px;background:var(--accent-soft);font-size:13.5px}
.banner .t{flex:1;min-width:180px}
.banner .btn{padding:5px 12px}

.day-sep{display:flex;align-items:center;gap:12px;margin:14px 16px 6px;font-size:12px;color:var(--muted);font-weight:700;letter-spacing:.03em}
.day-sep::before,.day-sep::after{content:"";flex:1;height:1px;background:var(--line)}
.msg{display:grid;grid-template-columns:38px minmax(0,1fr);column-gap:10px;padding:6px 16px;position:relative}
.msg:hover,.msg.act-open{background:var(--hover)}
.msg.cont{padding-top:1px;padding-bottom:3px}
.msg.hl{background:var(--hl)}
.av{width:36px;height:36px;border-radius:9px;display:grid;place-items:center;font-weight:700;color:#FFFFFF;font-size:15px;flex:none}
.av.sm{width:28px;height:28px;border-radius:8px;font-size:13px}
.stamp{visibility:hidden;font-size:10.5px;color:var(--muted);text-align:right;padding-top:4px;font-variant-numeric:tabular-nums}
.msg.cont:hover .stamp,.msg.cont.act-open .stamp{visibility:visible}
.meta{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.who{font-weight:700;font-size:14.5px}
.meta time{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.text{white-space:pre-wrap;overflow-wrap:anywhere}
.text a{color:var(--accent)}
.text .edited{color:var(--muted);font-size:12px;margin-left:4px}
.text.deleted{color:var(--muted);font-style:italic;font-size:14px}
.imgs{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}
.imgs img{max-width:min(300px,100%);max-height:220px;border-radius:8px;border:1px solid var(--line);cursor:zoom-in;object-fit:cover;background:var(--hover)}
.reacts{display:flex;flex-wrap:wrap;gap:4px;margin-top:5px}
.rc{border:1px solid var(--line);background:var(--bg);border-radius:999px;padding:0 9px;font-size:13px;cursor:pointer;line-height:24px;font-variant-numeric:tabular-nums}
.rc.mine{border-color:var(--accent);background:var(--accent-soft)}
.rep-link{margin-top:4px;border:0;background:none;color:var(--accent);font-size:13px;font-weight:700;cursor:pointer;padding:2px 0;display:inline-flex;gap:8px;align-items:baseline}
.rep-link span{color:var(--muted);font-weight:400;font-size:12px}
.acts{position:absolute;right:14px;top:-15px;display:none;background:var(--panel);border:1px solid var(--line);border-radius:9px;box-shadow:var(--shadow);padding:2px;z-index:2;flex-wrap:wrap;max-width:calc(100% - 28px)}
.msg:hover .acts,.msg.act-open .acts{display:flex}
@media (hover:none){.msg:hover .acts{display:none}.msg.act-open .acts{display:flex}.msg:hover{background:none}.msg.act-open{background:var(--hover)}}
.acts button{border:0;background:none;padding:4px 8px;border-radius:6px;cursor:pointer;font-size:13.5px;white-space:nowrap}
.acts button:hover{background:var(--hover)}
.acts .sep{width:1px;background:var(--line);margin:4px 2px}
.acts .del{color:var(--danger)}
.editbox textarea{width:100%;min-height:64px;border:1px solid var(--accent);border-radius:8px;padding:8px 10px;font:inherit;font-size:16px;background:var(--panel);color:var(--fg);resize:vertical}
.editbox .row{display:flex;gap:6px;justify-content:flex-end;margin-top:6px}

/* composer */
.composer{padding:0 16px calc(14px + env(safe-area-inset-bottom,0px))}
.cbox{border:1px solid var(--line-strong);border-radius:11px;background:var(--panel)}
.cbox:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.cbox textarea{display:block;width:100%;border:0;resize:none;background:transparent;color:var(--fg);font:inherit;font-size:16px;padding:10px 12px 4px;max-height:200px;outline:none;min-height:44px}
.cbox textarea::placeholder{color:var(--muted)}
.ctools{display:flex;align-items:center;gap:4px;padding:2px 6px 6px}
.ctools .hint{font-size:11.5px;color:var(--muted);margin-left:4px}
.send{margin-left:auto;background:var(--accent);color:var(--accent-fg);border:0;border-radius:8px;padding:6px 16px;font-weight:700;cursor:pointer}
.send:disabled{opacity:.35;cursor:default}
.attach{display:flex;flex-wrap:wrap;gap:6px;padding:0 10px}
.attach:empty{display:none}
.att{position:relative;width:64px;height:64px;border-radius:8px;overflow:hidden;border:1px solid var(--line);margin-top:8px}
.att img{width:100%;height:100%;object-fit:cover}
.att.busy img{opacity:.4}
.att button{position:absolute;top:2px;right:2px;width:22px;height:22px;border-radius:50%;border:0;background:var(--fg);color:var(--panel);font-size:12px;line-height:22px;cursor:pointer;padding:0}
.ro-note{margin:0 16px calc(14px + env(safe-area-inset-bottom,0px));padding:10px 12px;border-radius:9px;background:var(--hover);color:var(--muted);font-size:13px}

/* thread */
#thread{border-left:1px solid var(--line)}
.th-count{display:flex;align-items:center;gap:10px;margin:8px 16px;font-size:12px;color:var(--muted)}
.th-count::after{content:"";flex:1;height:1px;background:var(--line)}

/* overlays */
#scrim{display:none}
.modal-wrap{position:fixed;inset:0;background:var(--scrim);display:grid;place-items:center;z-index:50;padding:16px}
.modal{background:var(--panel);color:var(--fg);border-radius:14px;box-shadow:var(--shadow);width:min(460px,100%);max-height:calc(100% - 32px);overflow:auto;padding:20px}
.modal.wide{width:min(620px,100%)}
.modal h3{font-family:var(--f-disp);font-size:19px;margin:0 0 4px;text-wrap:balance}
.modal h4{font-size:13px;margin:18px 0 8px;color:var(--muted);letter-spacing:.04em}
.modal .lead{color:var(--muted);font-size:13.5px;margin:0 0 14px}
.fld{display:flex;flex-direction:column;gap:4px;margin-bottom:12px}
.fld label{font-size:12.5px;font-weight:700;color:var(--muted)}
.fld input,.fld textarea{font:inherit;font-size:16px;border:1px solid var(--line-strong);border-radius:8px;padding:8px 10px;background:var(--panel);color:var(--fg);width:100%}
.fld input:focus,.fld textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.fld .help{font-size:12px;color:var(--muted)}
.acts-row{display:flex;gap:8px;justify-content:flex-end;flex-wrap:wrap;margin-top:6px}
.btn{border:1px solid var(--line-strong);background:var(--panel);border-radius:8px;padding:7px 16px;cursor:pointer;font-weight:500}
.btn:hover{background:var(--hover)}
.btn.pri{background:var(--accent);border-color:var(--accent);color:var(--accent-fg);font-weight:700}
.btn.danger{color:var(--danger);border-color:var(--danger)}
.btn.left{margin-right:auto}
.btn.sm{padding:4px 10px;font-size:13px}
.btn:disabled{opacity:.5;cursor:default}
.box{border:1px solid var(--line);border-radius:10px;padding:12px;font-size:14px}
.box p{margin:0 0 8px}
.box ol{margin:4px 0 8px;padding-left:20px}
.box .row{display:flex;gap:8px;flex-wrap:wrap}
.copyline{display:flex;gap:6px;margin-top:8px}
.copyline input{flex:1;min-width:0;font:inherit;font-size:13px;border:1px solid var(--line-strong);border-radius:8px;padding:6px 8px;background:var(--bg);color:var(--fg)}
.ulist{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.urow{display:flex;align-items:center;gap:10px;padding:10px 12px;border-top:1px solid var(--line);flex-wrap:wrap}
.urow:first-child{border-top:0}
.urow .info{flex:1;min-width:140px}
.urow .nm{font-weight:700}
.urow .sub{font-size:12px;color:var(--muted)}
.urow.off .nm{color:var(--muted);text-decoration:line-through}
.s-results{display:flex;flex-direction:column;gap:2px;margin-top:8px;max-height:55vh;overflow:auto}
.s-row{border:0;background:none;text-align:left;padding:8px 10px;border-radius:8px;cursor:pointer;display:flex;flex-direction:column;gap:2px}
.s-row:hover{background:var(--hover)}
.s-row .m{font-size:12px;color:var(--muted)}
.s-row .t{font-size:14px;overflow-wrap:anywhere;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.s-row mark{background:var(--hl);color:inherit;border-radius:2px}
#lightbox{position:fixed;inset:0;background:var(--scrim);z-index:60;display:grid;place-items:center;padding:16px;cursor:zoom-out}
#lightbox img{max-width:100%;max-height:100%;border-radius:8px;box-shadow:var(--shadow)}
#toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--fg);color:var(--panel);padding:9px 16px;border-radius:9px;font-size:13.5px;z-index:70;max-width:calc(100% - 32px);box-shadow:var(--shadow)}

@media (max-width:760px){
  #app,#app.has-thread{grid-template-columns:minmax(0,1fr)}
  #side{position:fixed;top:0;bottom:0;left:0;width:min(300px,86vw);z-index:30;transform:translateX(-102%);transition:transform .2s ease;padding-top:env(safe-area-inset-top,0px)}
  #app.drawer #side{transform:none}
  #app.drawer #scrim{display:block;position:fixed;inset:0;background:var(--scrim);z-index:29}
  #thread{position:fixed;inset:0;z-index:25;border-left:0;padding-top:env(safe-area-inset-top,0px)}
  .menu-btn{display:inline-flex}
  .ctools .hint{display:none}
  .top .lbl{display:none}
  .top{padding:8px 10px}
  .acts{right:8px}
}