:root{--bg:#f4f5f7;--panel:#ffffff;--line:#e3e6ea;--ink:#1f2933;--sub:#6b7684;--accent:#2563eb;--accent-soft:#eaf1fe;--warn:#b45309;--warn-soft:#fef3e2;--ok:#047857;--ok-soft:#e6f6ef;--pin:#7c3aed;--pin-soft:#f1ebfd;--radius:10px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Hiragino Sans,Yu Gothic UI,Noto Sans JP,sans-serif;background:var(--bg);color:var(--ink);font-size:14px}button{font-family:inherit}a{color:var(--accent);text-decoration:none}.center-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.auth-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:36px 32px;width:420px;max-width:94vw;text-align:center}.auth-card .logo{font-size:22px;font-weight:700;margin-bottom:6px}.auth-card .logo span{color:var(--accent)}.auth-card p{color:var(--sub);font-size:13px;line-height:1.8;margin-bottom:22px}.google-btn{display:inline-flex;align-items:center;gap:10px;background:#fff;border:1px solid #c3cad4;border-radius:10px;padding:11px 22px;font-size:14px;font-weight:600;cursor:pointer;width:100%;justify-content:center}.google-btn:hover{background:#f6f8fa}.auth-note{font-size:11.5px;color:var(--sub);margin-top:16px;line-height:1.7}.auth-error{background:var(--warn-soft);color:var(--warn);border-radius:8px;padding:10px 12px;font-size:12.5px;margin-bottom:14px;line-height:1.6}.shell{display:flex;flex-direction:column;height:100vh;height:100dvh}.topbar{background:#111827;color:#fff;padding:10px 18px;display:flex;align-items:center;gap:14px;flex-shrink:0}.topbar .logo{font-weight:700;font-size:15px}.topbar .logo span{color:#93c5fd}.topbar .grow{margin-left:auto;display:flex;align-items:center;gap:10px}.topbar .who{font-size:12px;color:#d1d5db}.mbtn{background:#1f2937;color:#e5e7eb;border:1px solid #374151;border-radius:8px;padding:6px 12px;font-size:12.5px;cursor:pointer;font-weight:600;display:inline-flex;align-items:center;gap:6px}.mbtn:hover{background:#374151}.mbtn .cnt{background:#ef4444;color:#fff;border-radius:99px;font-size:10px;padding:1px 6px;font-weight:700}.app-body{display:flex;flex:1 1;min-height:0}.side{width:230px;background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;flex-shrink:0;overflow-y:auto}.side h2{font-size:11px;color:var(--sub);padding:14px 14px 6px;font-weight:600;letter-spacing:.05em}.room-link{padding:9px 14px;display:flex;align-items:center;gap:8px;border-left:3px solid transparent;color:var(--ink)}.room-link:hover{background:#f0f3f7}.room-link.active{background:var(--accent-soft);border-left-color:var(--accent);font-weight:600}.room-link .name{flex:1 1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.room-link.archived{color:var(--sub)}.side-archive>summary{font-size:11px;color:var(--sub);padding:14px 14px 6px;font-weight:600;letter-spacing:.05em;cursor:pointer;list-style:none;-webkit-user-select:none;-moz-user-select:none;user-select:none}.side-archive>summary::-webkit-details-marker{display:none}.side-archive>summary:before{content:"▸";display:inline-block;width:12px}.side-archive[open]>summary:before{content:"▾"}.side-archive>summary:hover{color:var(--ink)}.side form{padding:10px 14px}.side .foot{margin-top:auto;padding:12px 14px;border-top:1px solid var(--line);font-size:11px;color:var(--sub);line-height:1.6}.new-room-row{display:flex;gap:6px}.new-room-row input{flex:1 1;border:1px solid var(--line);border-radius:8px;padding:7px 9px;font-size:12.5px;outline:none;min-width:0}.new-room-row button{background:var(--accent);color:#fff;border:none;border-radius:8px;padding:0 12px;font-size:12.5px;font-weight:700;cursor:pointer}.main{flex:1 1;display:flex;flex-direction:column;min-width:0}.roomhead{background:var(--panel);border-bottom:1px solid var(--line);padding:10px 18px;display:flex;align-items:center;gap:12px;flex-wrap:wrap}.roomhead .title{font-weight:700;font-size:15px}.avatar{width:26px;height:26px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;color:#fff;font-size:11px;font-weight:700;flex-shrink:0}.primary-btn{background:var(--accent);color:#fff;border:none;border-radius:8px;padding:7px 14px;font-size:13px;cursor:pointer;font-weight:600}.primary-btn:hover{background:#1d4ed8}.ghost-btn{background:none;border:1px solid var(--line);border-radius:8px;padding:6px 12px;font-size:12.5px;cursor:pointer;color:var(--sub);font-weight:600}.feed{flex:1 1;overflow-y:auto;padding:18px 22px;display:flex;flex-direction:column;gap:14px}.day{align-self:center;font-size:11px;color:var(--sub);background:#e9edf2;padding:3px 12px;border-radius:99px}.msg{display:flex;gap:10px;max-width:760px;position:relative}.msg .body{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:9px 12px;flex:1 1}.msg .meta{font-size:11px;color:var(--sub);margin-bottom:3px;display:flex;gap:8px;align-items:center;flex-wrap:wrap}.msg .meta .who{font-weight:700;color:var(--ink);font-size:12px}.guest-tag{background:var(--warn-soft);color:var(--warn);padding:1px 6px;border-radius:4px;font-size:10px;font-weight:600}.msg .text{line-height:1.65;white-space:pre-wrap;word-break:break-word}.mention{background:var(--accent-soft);color:var(--accent);font-weight:700;border-radius:4px;padding:0 3px}.msg .text a{color:var(--accent);text-decoration:underline}.quote{display:block;width:100%;text-align:left;border:none;border-left:3px solid #c7d5ea;background:#f7f9fc;border-radius:0 6px 6px 0;padding:5px 8px;margin-bottom:5px;font:inherit;font-size:12px;color:#55606d;cursor:pointer}.quote:hover{background:#eef3f9}.quote-who{display:block;color:var(--accent);font-size:11px;font-weight:700;margin-bottom:1px}.quote-body{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.msg.flash .body{box-shadow:0 0 0 2px var(--accent);transition:box-shadow .3s}.reply-btn{border:1px solid var(--line);background:var(--panel);border-radius:6px;padding:1px 7px;font:inherit;font-size:11px;font-weight:700;color:var(--sub);cursor:pointer;opacity:.35;margin-right:4px}.msg:hover .reply-btn{opacity:1}.reply-bar{display:flex;align-items:center;gap:8px;background:#f7f9fc;border-left:3px solid var(--accent);border-radius:0 6px 6px 0;padding:6px 8px;margin-bottom:8px;font-size:12px;color:#55606d}.reply-bar-who{color:var(--accent);font-weight:700;flex-shrink:0}.reply-bar-body{flex:1 1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.reply-bar button{margin-left:auto;background:none;border:none;font-size:14px;color:var(--sub);cursor:pointer;padding:0 2px}.msg .pins-row{margin-top:6px;display:flex;gap:6px;flex-wrap:wrap}.pinned-label{font-size:10.5px;padding:2px 8px;border-radius:4px;font-weight:700}.pinned-label.task{background:var(--warn-soft);color:var(--warn)}.pinned-label.decision{background:var(--ok-soft);color:var(--ok)}.pinned-label.due{background:var(--pin-soft);color:var(--pin)}.msg .reaction-row{margin-top:6px;display:flex;gap:4px;flex-wrap:wrap;align-items:center}.reaction-chip{display:inline-flex;align-items:center;gap:4px;border:1px solid var(--line);background:var(--panel);border-radius:11px;padding:1px 8px;font:inherit;font-size:12px;line-height:1.6;cursor:pointer}.reaction-chip:hover{background:#f0f3f7}.reaction-chip.mine{border-color:var(--accent);background:var(--accent-soft)}.reaction-count{font-size:11px;font-weight:700;color:var(--sub)}.reaction-chip.mine .reaction-count{color:var(--accent)}.reaction-picker{position:relative;display:inline-flex}.reaction-add{border:1px solid var(--line);background:var(--panel);border-radius:11px;padding:1px 7px;font:inherit;font-size:12px;line-height:1.6;cursor:pointer;opacity:.35}.msg:hover .reaction-add,.reaction-add[aria-expanded=true]{opacity:1}.reaction-veil{position:fixed;inset:0;z-index:40}.reaction-palette{position:absolute;left:0;bottom:100%;margin-bottom:4px;z-index:50;background:var(--panel);border:1px solid var(--line);border-radius:10px;box-shadow:0 4px 14px rgba(0,0,0,.12);padding:4px;display:flex;gap:2px}.reaction-palette button{border:none;background:none;font-size:19px;line-height:1;padding:6px;border-radius:8px;cursor:pointer}.reaction-palette button:hover{background:#f0f3f7}.msg .actions{position:absolute;right:6px;top:4px;display:flex;align-items:center}.msg-menu{position:relative}.msg-menu-btn{border:1px solid var(--line);background:var(--panel);border-radius:6px;padding:1px 7px;font-size:12px;line-height:1.4;cursor:pointer;color:var(--sub);font-weight:700;opacity:.35}.msg-menu-btn[aria-expanded=true],.msg:hover .msg-menu-btn{opacity:1}.msg-menu-veil{position:fixed;inset:0;z-index:40}.msg-menu-list{position:absolute;right:0;top:100%;margin-top:4px;z-index:50;background:var(--panel);border:1px solid var(--line);border-radius:8px;box-shadow:0 4px 14px rgba(0,0,0,.12);padding:4px;min-width:150px;display:flex;flex-direction:column}.msg-menu-list button{border:none;background:none;text-align:left;font:inherit;font-size:12.5px;padding:8px 10px;border-radius:6px;cursor:pointer;color:var(--ink)}.msg-menu-list button:hover{background:#f0f3f7}.compose{padding:12px 18px 16px;background:var(--panel);border-top:1px solid var(--line);flex-shrink:0}.compose .box{display:flex;gap:8px}.compose textarea{flex:1 1;border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-family:inherit;font-size:14px;resize:none;height:44px;outline:none}.compose textarea:focus{border-color:var(--accent)}.compose button{background:var(--accent);color:#fff;border:none;border-radius:10px;padding:0 20px;font-size:14px;font-weight:700;cursor:pointer}.compose button:disabled{opacity:.5;cursor:default}.compose .note{font-size:11px;color:var(--sub);margin-top:6px}.mention-bar{display:flex;flex-wrap:wrap;align-items:center;gap:6px;margin-bottom:8px}.mention-bar-label{font-size:11px;color:var(--sub);margin-right:2px}.compose .mention-bar button.mention-chip{background:var(--accent-soft);color:var(--accent);border:1px solid transparent;border-radius:999px;padding:3px 10px;font-size:12px;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:5px}.compose .mention-bar button.mention-chip:hover{border-color:var(--accent)}.board{width:290px;background:var(--panel);border-left:1px solid var(--line);overflow-y:auto;flex-shrink:0;padding-bottom:20px}.board section{padding:14px 16px 4px}.board h3{font-size:12px;font-weight:700;color:var(--sub);margin-bottom:8px;display:flex;align-items:center;gap:6px}.board h3 .dot{width:8px;height:8px;border-radius:50%}.card{border:1px solid var(--line);border-radius:8px;padding:8px 10px;margin-bottom:8px;font-size:12.5px;line-height:1.5}.card.task{border-left:3px solid var(--warn)}.card.decision{border-left:3px solid var(--ok)}.card.due{border-left:3px solid var(--pin)}.card label{display:flex;gap:7px;align-items:flex-start;cursor:pointer}.card input[type=checkbox]{margin-top:2px}.card.done{opacity:.45;text-decoration:line-through}.card-actions{display:flex;justify-content:flex-end;margin-top:6px;text-decoration:none}.unpin-btn{background:none;border:none;font:inherit;font-size:10px;font-weight:700;color:inherit;cursor:pointer;padding:0;margin-left:6px;text-decoration:underline;opacity:.7}.unpin-btn:hover{opacity:1}.card-actions .unpin-btn{font-size:11px;color:var(--sub);margin-left:0;text-decoration:none;border:1px solid var(--line);border-radius:6px;padding:2px 8px}.card-actions .unpin-btn:hover{background:#f0f3f7}.drive-link{display:block;text-align:center;background:var(--accent-soft);color:var(--accent);border-radius:8px;padding:8px;font-size:12.5px;font-weight:700;margin-bottom:8px}.member-row{display:flex;align-items:center;gap:8px;padding:4px 0;font-size:12.5px}.member-row .guest-tag{margin-left:auto}.member-row .ghost-btn{padding:2px 8px;font-size:11px;flex-shrink:0}.empty{font-size:12px;color:var(--sub);padding:4px 0 8px}.board .inline-form{display:flex;gap:6px;margin-top:6px}.board .inline-form input{flex:1 1;border:1px solid var(--line);border-radius:8px;padding:7px 9px;font-size:12px;outline:none;min-width:0}.board .inline-form button{background:var(--accent);color:#fff;border:none;border-radius:8px;padding:0 12px;font-size:12px;font-weight:700;cursor:pointer}.board-open{display:none}.board-wrap{display:contents}.board-bar{display:none}.home-list{flex:1 1;overflow-y:auto;background:var(--panel)}.home-row{display:flex;gap:10px;align-items:center;padding:12px 16px;border-bottom:1px solid #eef1f5;color:var(--ink)}.home-row:hover{background:#f8fafc}.home-mark{color:var(--sub);font-weight:700;flex-shrink:0}.home-main{flex:1 1;min-width:0}.home-name{display:block;font-weight:700;font-size:14px}.home-preview{display:block;color:var(--sub);font-size:12.5px;margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.home-side{display:flex;flex-direction:column;align-items:flex-end;gap:4px;flex-shrink:0}.home-time{font-size:11px;color:var(--sub)}.home-side .cnt{background:#ef4444;color:#fff;border-radius:99px;font-size:10px;padding:1px 6px;font-weight:700}.home-archive>summary{font-size:11px;color:var(--sub);padding:12px 16px;font-weight:600;cursor:pointer;list-style:none}.home-archive>summary::-webkit-details-marker{display:none}.home-archive>summary:before{content:"▸";display:inline-block;width:12px}.home-archive[open]>summary:before{content:"▾"}.home-newroom{padding:14px 16px;border-top:1px solid var(--line)}.mention-list{flex:1 1;overflow-y:auto;padding:18px 22px;display:flex;flex-direction:column;gap:12px}.mcard{max-width:760px;background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:var(--radius);padding:10px 14px;display:block;color:var(--ink)}.mcard:hover{background:#f8fafc}.mcard .room-tag{font-size:11px;color:var(--accent);font-weight:700;margin-bottom:4px}.kind-tag{display:inline-block;margin-right:6px;padding:1px 6px;border-radius:4px;font-size:10px;font-weight:700}.kind-tag.mention{background:var(--accent-soft);color:var(--accent)}.kind-tag.reply{background:var(--ok-soft);color:var(--ok)}.kind-tag.reaction{background:var(--pin-soft);color:var(--pin)}.mcard .text{line-height:1.6}.mcard .jump{font-size:11px;color:var(--sub);margin-top:5px}.mcard.unread{box-shadow:0 0 0 1px var(--accent)}.bottom-nav,.room-back{display:none}@media (max-width:820px){.app-body{flex-direction:column;min-height:0}.topbar{flex-wrap:wrap;gap:8px 10px;padding:8px 12px}.topbar .who{width:100%;order:3}.side,[data-view=room] .topbar{display:none}[data-view=list] .bottom-nav{display:flex}.room-back{display:inline-block;color:var(--accent);font-size:18px;line-height:1;padding:2px 4px 2px 0}.main{flex:1 1;min-height:0}.feed{padding:14px}.compose{padding:10px 12px 12px}.msg{max-width:100%}.compose textarea{font-size:16px;height:52px}.board-open{display:inline-block;margin-left:auto;background:var(--accent-soft);color:var(--accent);border:none;border-radius:8px;padding:5px 10px;font-size:12px;font-weight:700;cursor:pointer}.board-wrap{display:none;position:fixed;inset:0;z-index:60;background:var(--panel);flex-direction:column}.board-bar,.board-wrap.open{display:flex}.board-bar{align-items:center;gap:10px;padding:10px 14px;border-bottom:1px solid var(--line);font-weight:700;flex-shrink:0}.board-bar button{background:none;border:none;font-size:17px;cursor:pointer;color:var(--sub);padding:0 2px}.board{width:100%;border-left:none;border-top:none;overflow-y:auto;flex:1 1}.mention-list{padding:14px}.mcard{max-width:100%}.reaction-add,.reply-btn{opacity:1}.reaction-veil{background:rgba(0,0,0,.25);z-index:70}.reaction-palette{position:fixed;left:0;right:0;bottom:0;top:auto;margin:0;z-index:80;border-radius:14px 14px 0 0;padding:10px 10px calc(10px + env(safe-area-inset-bottom));justify-content:space-around}.reaction-palette button{font-size:26px;padding:10px}.msg-menu-btn{opacity:1}.msg-menu-veil{background:rgba(0,0,0,.25);z-index:70}.msg-menu-list{position:fixed;left:0;right:0;bottom:0;top:auto;margin:0;z-index:80;border-radius:14px 14px 0 0;padding:8px 8px calc(8px + env(safe-area-inset-bottom));min-width:0}.msg-menu-list button{font-size:15px;padding:14px 12px}}.bottom-nav{background:var(--panel);border-top:1px solid var(--line);flex-shrink:0}.bnav-item{flex:1 1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:8px 0 10px;color:var(--sub);font-size:10px;position:relative}.bnav-item.on{color:var(--accent);font-weight:700}.bnav-ic{font-size:17px;line-height:1.1}.bnav-item .cnt{position:absolute;top:4px;right:50%;transform:translateX(22px);background:#ef4444;color:#fff;border-radius:99px;font-size:10px;padding:0 5px;font-weight:700}.help-page{flex:1 1;min-width:0;overflow-y:auto;padding:26px 30px 60px;background:var(--bg)}.help-head{max-width:860px;margin:0 auto 6px}.help-head h1{font-size:20px;color:var(--ink)}.help-head p{font-size:12.5px;color:var(--sub);margin-top:3px}.help-tabs{max-width:860px;margin:18px auto 0;display:flex;gap:8px}.help-tabs button{flex:1 1;padding:11px 10px;border:1px solid var(--line);border-bottom:none;background:var(--panel);border-radius:var(--radius) var(--radius) 0 0;font:inherit;font-size:13.5px;font-weight:600;color:var(--sub);cursor:pointer}.help-tabs button[aria-selected=true]{color:var(--accent);background:var(--accent-soft);border-color:#c7d9ff;box-shadow:inset 0 3px 0 var(--accent)}.help-body{max-width:860px;margin:0 auto;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:6px 28px 30px;line-height:1.85;font-size:14.5px}.help-tabs+[role=tabpanel] .help-body,.help-tabs~[role=tabpanel] .help-body{border-radius:0 0 var(--radius) var(--radius)}.help-body h2{font-size:18px;margin:30px 0 6px;padding-top:14px;border-top:1px solid var(--line)}.help-body h2:first-of-type{border-top:none;margin-top:16px}.help-body h3{font-size:15px;margin:20px 0 4px;color:var(--ink)}.help-body p{margin:8px 0}.help-body ol,.help-body ul{margin:8px 0;padding-left:1.4em}.help-body li{margin:5px 0}.help-lead{color:var(--sub);font-size:13.5px}.help-small{color:var(--sub);font-size:13px}.help-table{width:100%;border-collapse:collapse;margin:14px 0;font-size:13.5px}.help-table td,.help-table th{border:1px solid var(--line);padding:9px 12px;text-align:left;vertical-align:top}.help-table th{background:#f2f5f9;font-weight:600;white-space:nowrap}.help-note,.help-ok,.help-warn{border-radius:8px;padding:12px 16px;margin:14px 0;font-size:13.5px}.help-note{background:var(--accent-soft);border:1px solid #c7d9ff}.help-warn{background:var(--warn-soft);border:1px solid #fed7aa;color:#7c3a06}.help-ok{background:var(--ok-soft);border:1px solid #bbf7d0;color:#14532d}.help-note b:first-child,.help-ok b:first-child,.help-warn b:first-child{display:block;margin-bottom:2px}.help-warn ul{margin:6px 0 0}.help-body code,.help-ui{background:#eef2f7;border:1px solid #dde4ec;border-radius:5px;padding:1px 6px;font-size:12.5px;font-family:inherit;white-space:nowrap}.help-pin{color:var(--pin);font-weight:600}@media (max-width:820px){.help-page{overflow-y:auto;padding:18px 14px 40px}.help-body{padding:4px 16px 24px}.help-table th{white-space:normal}}