:root{--bg: #f2f2ef;--panel: #ffffff;--rail: #f7f7f4;--ink: #1b1b19;--ink-soft: #55554f;--ink-faint: #8a8a82;--line: #e2e2db;--line-soft: #ededE7;--accent: #2f5d50;--accent-soft: #e8f0ed;--accent-line: #cadfd7;--sel: #e4ece9;--danger: #9b3226;--warn: #8a6417;--radius: 7px;--topbar-h: 48px;--rail-w: 236px;--list-w: 400px}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}button{font:inherit;padding:6px 12px;border-radius:var(--radius);border:1px solid var(--line);background:var(--panel);color:var(--ink);cursor:pointer;white-space:nowrap;transition:background .12s,border-color .12s}button:hover:not(:disabled){background:#fafaf7;border-color:#d3d3ca}button:disabled{opacity:.45;cursor:default}button.primary{background:var(--accent);border-color:var(--accent);color:#fff}button.primary:hover:not(:disabled){background:#274d43;border-color:#274d43}button.danger{color:var(--danger)}button.ghost{border-color:transparent;background:transparent;color:var(--ink-soft);padding:5px 8px}button.ghost:hover:not(:disabled){background:var(--line-soft)}button.sm{padding:3px 8px;font-size:12.5px}input,textarea,select{font:inherit;width:100%;padding:7px 10px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);color:var(--ink)}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}textarea{resize:vertical;line-height:1.6}label.field{display:block;margin-bottom:12px}label.field>span{display:block;font-size:12px;color:var(--ink-soft);margin-bottom:4px}.row{display:flex;gap:8px;align-items:center}.grow{flex:1;min-width:0}.truncate{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.shell{display:flex;flex-direction:column;height:100%}.topbar{display:flex;align-items:center;gap:14px;padding:0 14px;height:var(--topbar-h);background:var(--panel);border-bottom:1px solid var(--line);flex:0 0 auto}.topbar .brand{font-weight:650;letter-spacing:-.01em;margin-right:4px}.topbar .tabs{display:flex;gap:2px}.topbar .tabs a{color:var(--ink-soft);padding:5px 11px;border-radius:var(--radius);font-size:13.5px}.topbar .tabs a:hover{background:var(--line-soft);text-decoration:none}.topbar .tabs a.active{background:var(--sel);color:var(--accent);font-weight:550}.workbench{flex:1;display:flex;min-height:0}.rail{width:var(--rail-w);flex:0 0 var(--rail-w);background:var(--rail);border-right:1px solid var(--line);overflow-y:auto;padding:12px 10px}.rail .compose{width:100%;margin-bottom:14px}.rail h3{font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-faint);margin:16px 6px 6px;font-weight:600}.rail .item{display:flex;align-items:center;gap:8px;padding:6px 9px;border-radius:var(--radius);cursor:pointer;color:var(--ink-soft);font-size:13.5px;border:1px solid transparent}.rail .item:hover{background:#ecece7}.rail .item.active{background:var(--sel);color:var(--accent);font-weight:600;border-color:var(--accent-line)}.rail .item .count{margin-left:auto;font-size:12px;color:var(--ink-faint);font-variant-numeric:tabular-nums}.rail .item.active .count{color:var(--accent)}.rail .dot{width:7px;height:7px;border-radius:50%;flex:0 0 7px}.list-pane{width:var(--list-w);flex:0 0 var(--list-w);border-right:1px solid var(--line);background:var(--panel);display:flex;flex-direction:column;min-height:0}.list-head{padding:9px 12px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:8px;flex:0 0 auto}.list-head .title{font-weight:650}.list-head .n{color:var(--ink-faint);font-size:12.5px}.list-scroll{overflow-y:auto;flex:1}.msg-row{display:block;width:100%;text-align:left;padding:9px 12px 10px;border:0;border-bottom:1px solid var(--line-soft);border-left:3px solid transparent;background:none;cursor:pointer;border-radius:0}.msg-row:hover{background:#fafaf7}.msg-row.selected{background:var(--sel);border-left-color:var(--accent)}.msg-row.selected:hover{background:var(--sel)}.msg-row .l1{display:flex;align-items:baseline;gap:7px}.msg-row .who{font-weight:600;font-size:13.5px;min-width:0}.msg-row.unread .who{font-weight:700}.msg-row .when{margin-left:auto;font-size:11.5px;color:var(--ink-faint);flex:0 0 auto;font-variant-numeric:tabular-nums}.msg-row .l2{font-size:13px;margin-top:1px;color:var(--ink)}.msg-row.unread .l2{font-weight:600}.msg-row .l3{font-size:12.5px;color:var(--ink-faint);margin-top:2px}.msg-row .tags{display:flex;gap:5px;align-items:center;margin-top:5px;flex-wrap:wrap}.chip{font-size:10.5px;padding:1px 6px;border-radius:3px;border:1px solid var(--line);color:var(--ink-soft);background:#fbfbf8;white-space:nowrap;letter-spacing:.01em}.chip.important{color:#8a2f22;border-color:#f0cfc8;background:#fdf0ed}.chip.fyi{color:var(--warn);border-color:#ecdfbe;background:#fdf7e8}.chip.skip{color:var(--ink-faint)}.chip.acc{color:var(--accent);border-color:var(--accent-line);background:var(--accent-soft)}.chip.done{color:var(--ink-faint)}.chip.promise{color:#2b5a80;border-color:#c5dcec;background:#eaf3f9}.clip{color:var(--ink-faint);font-size:11px}.read-pane{flex:1;min-width:0;display:flex;flex-direction:column;background:var(--bg)}.read-scroll{overflow-y:auto;flex:1;padding:18px 22px 40px}.read-inner{max-width:900px;margin:0 auto}.read-head{margin-bottom:14px}.read-head h1{font-size:19px;margin:0 0 6px;letter-spacing:-.01em;line-height:1.3}.read-head .meta{font-size:12.5px;color:var(--ink-faint);display:flex;gap:7px;align-items:center;flex-wrap:wrap}.summary-box{background:var(--accent-soft);border:1px solid var(--accent-line);border-radius:var(--radius);padding:10px 13px;margin-bottom:14px;font-size:13px;color:#23483e}.summary-box b{font-weight:650}.letter{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);margin-bottom:10px;overflow:hidden}.letter.out{background:#fbfbf8}.letter-head{padding:9px 14px;border-bottom:1px solid var(--line-soft);display:flex;align-items:baseline;gap:8px;cursor:pointer}.letter-head .from{font-weight:600;font-size:13.5px}.letter-head .dir{font-size:11px;color:var(--ink-faint)}.letter-head .date{margin-left:auto;font-size:11.5px;color:var(--ink-faint);flex:0 0 auto}.letter-addr{padding:7px 14px 0;font-size:12px;color:var(--ink-faint);word-break:break-word}.letter-body{padding:11px 14px 14px;white-space:pre-wrap;overflow-wrap:anywhere;word-break:normal;font-size:13.5px;line-height:1.6;margin:0;font-family:inherit;max-width:100%}.letter-body .quoted{color:var(--ink-faint)}.letter-atts{padding:0 14px 12px;display:flex;gap:8px;flex-wrap:wrap}.att{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:var(--radius);padding:4px 9px;font-size:12.5px;background:var(--panel);color:var(--ink-soft)}.att:hover{background:#f7f7f3;text-decoration:none}.att .sz{color:var(--ink-faint);font-size:11.5px}.quote-toggle{margin:6px 0 0;padding:1px 8px;font-size:12px;line-height:1.4;border-radius:10px;background:var(--line-soft);border-color:transparent;color:var(--ink-faint)}.reply{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);margin-top:16px}.reply-head{display:flex;align-items:center;gap:10px;padding:10px 14px;border-bottom:1px solid var(--line-soft)}.reply-head .t{font-weight:650;font-size:13.5px}.reply-head .state{font-size:12px;color:var(--ink-faint);margin-left:auto}.reply-body{padding:12px 14px 14px}.reply-body textarea{min-height:180px;font-size:13.5px}.addr-row{display:flex;gap:10px;align-items:flex-end;flex-wrap:wrap;margin-bottom:10px}.reply-controls{display:flex;gap:10px;align-items:flex-end;margin-top:10px;flex-wrap:wrap}.reply-controls .from-sel{min-width:220px}.reply-controls .spacer{flex:1}.chat-wrap{border-top:1px solid var(--line-soft);padding:12px 14px 14px}.chat-wrap .t{font-weight:650;font-size:13.5px;margin-bottom:8px}.chat{display:flex;flex-direction:column;gap:7px;max-height:260px;overflow-y:auto;margin-bottom:9px}.bubble{font-size:13px;padding:7px 11px;border-radius:12px;line-height:1.5;white-space:pre-wrap;max-width:85%}.bubble.user{background:var(--accent-soft);align-self:flex-end}.bubble.assistant{background:#f3f3ee;align-self:flex-start}.hint{font-size:12.5px;color:var(--ink-faint);font-style:italic}.attach-list{list-style:none;padding:0;margin:10px 0 0}.attach-list li{display:flex;align-items:center;gap:8px;font-size:13px;padding:5px 0;border-bottom:1px solid var(--line-soft)}.attach-list li:last-child{border-bottom:none}.attach-list .sz{color:var(--ink-faint);font-size:12px;margin-left:auto}.empty{display:flex;align-items:center;justify-content:center;height:100%;color:var(--ink-faint);font-size:13.5px;padding:30px;text-align:center}.notice{padding:9px 12px;border-radius:var(--radius);font-size:13px;margin-bottom:12px}.notice.error{background:#fdeeec;border:1px solid #f2cfc9;color:var(--danger)}.notice.ok{background:var(--accent-soft);border:1px solid var(--accent-line);color:#23483e}.notice.info{background:#fdf7e8;border:1px solid #ecdfbe;color:var(--warn)}.page{flex:1;overflow-y:auto;padding:26px 22px 60px}.page-inner{max-width:720px;margin:0 auto}.page h1{font-size:20px;margin:0 0 4px}.page .sub{color:var(--ink-faint);font-size:13px;margin:0 0 20px}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px}.card+.card{margin-top:14px}.card h2{font-size:14.5px;margin:0 0 10px}.account-row{display:flex;align-items:center;gap:12px;padding:11px 0;border-bottom:1px solid var(--line-soft)}.account-row:last-of-type{border-bottom:none}.account-row .email{font-weight:600}.account-row .detail{font-size:12px;color:var(--ink-faint)}.login-wrap{display:flex;align-items:center;justify-content:center;height:100vh;padding:20px;background:var(--bg)}.login-box{width:100%;max-width:330px}.login-box h1{font-size:20px;margin:0 0 4px}@media(max-width:1180px){:root{--list-w: 340px}}@media(max-width:980px){.rail{display:none}}@media(max-width:760px){.list-pane{width:100%;flex:1 1 auto}.list-pane.hide-mobile,.read-pane.hide-mobile{display:none}}