:root{--bg: #f7f7f5;--panel: #ffffff;--ink: #1c1c1a;--ink-soft: #5c5c56;--ink-faint: #8c8c85;--line: #e3e3dd;--line-soft: #eeeee9;--accent: #2f5d50;--accent-soft: #eaf1ee;--danger: #9b3226;--warn: #8a6417;--radius: 8px;--mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.55 -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}.shell{display:flex;flex-direction:column;min-height:100%}.topbar{display:flex;align-items:center;gap:18px;padding:0 22px;height:52px;background:var(--panel);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}.topbar .brand{font-weight:600;letter-spacing:-.01em}.topbar nav{display:flex;gap:16px}.topbar nav a{color:var(--ink-soft);font-size:14px}.topbar nav a.active{color:var(--ink);font-weight:500}.topbar .spacer{flex:1}.page{width:100%;max-width:1180px;margin:0 auto;padding:26px 22px 60px}.page.narrow{max-width:720px}h1{font-size:21px;margin:0 0 4px;letter-spacing:-.01em}h2{font-size:15px;margin:0 0 10px;font-weight:600}.sub{color:var(--ink-faint);font-size:13px;margin:0 0 20px}button,.btn{font:inherit;font-size:14px;padding:7px 14px;border-radius:var(--radius);border:1px solid var(--line);background:var(--panel);color:var(--ink);cursor:pointer;transition:background .12s,border-color .12s}button:hover:not(:disabled){background:#fafaf8;border-color:#d5d5cd}button:disabled{opacity:.5;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:6px 8px}button.ghost:hover:not(:disabled){background:var(--line-soft)}input,textarea,select{font:inherit;font-size:14px;width:100%;padding:8px 11px;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:10px;align-items:center;flex-wrap:wrap}.row.end{justify-content:flex-end}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px}.badge{display:inline-block;font-size:11px;padding:2px 7px;border-radius:20px;border:1px solid var(--line);color:var(--ink-soft);background:#fbfbf9;white-space:nowrap}.badge.important{color:var(--accent);border-color:#cfe0d9;background:var(--accent-soft)}.badge.fyi{color:var(--warn);border-color:#ecdfbe;background:#fdf7e8}.badge.answered{color:var(--ink-faint)}.notice{padding:10px 13px;border-radius:var(--radius);font-size:14px;margin-bottom:16px}.notice.error{background:#fdeeec;border:1px solid #f2cfc9;color:var(--danger)}.notice.ok{background:var(--accent-soft);border:1px solid #cfe0d9;color:var(--accent)}.notice.info{background:#fdf7e8;border:1px solid #ecdfbe;color:var(--warn)}.empty{color:var(--ink-faint);padding:42px 0;text-align:center;font-size:14px}.filters{display:flex;gap:8px;align-items:center;margin-bottom:16px;flex-wrap:wrap}.filters select{width:auto;min-width:150px}.filters .spacer{flex:1}.thread-list{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--panel)}.thread-row{display:block;padding:14px 16px;border-bottom:1px solid var(--line-soft);color:inherit;cursor:pointer}.thread-row:last-child{border-bottom:none}.thread-row:hover{background:#fbfbf9;text-decoration:none}.thread-row .line1{display:flex;align-items:baseline;gap:9px;margin-bottom:3px}.thread-row .who{font-weight:600;font-size:14px}.thread-row .when{margin-left:auto;color:var(--ink-faint);font-size:12px;white-space:nowrap}.thread-row .subject{font-size:14px;color:var(--ink-soft);margin-bottom:4px}.thread-row .summary{font-size:13px;color:var(--ink-faint);line-height:1.5}.thread-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px;align-items:start}@media(max-width:940px){.thread-grid{grid-template-columns:minmax(0,1fr)}}.message{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;margin-bottom:12px}.message.outgoing{background:#fbfbf9;border-style:dashed}.message .meta{font-size:12px;color:var(--ink-faint);margin-bottom:8px;line-height:1.5}.message .meta strong{color:var(--ink-soft);font-weight:500}.message .body{white-space:pre-wrap;word-break:break-word;font-size:14px;line-height:1.6;margin:0;font-family:inherit}.message .attachments{margin-top:10px;padding-top:10px;border-top:1px solid var(--line-soft);font-size:13px}.message .attachments a{margin-right:12px}.workarea{position:sticky;top:72px;display:flex;flex-direction:column;gap:16px}@media(max-width:940px){.workarea{position:static}}.chat{max-height:320px;overflow-y:auto;display:flex;flex-direction:column;gap:9px;margin-bottom:12px}.chat .bubble{font-size:13px;padding:8px 11px;border-radius:var(--radius);line-height:1.5;white-space:pre-wrap}.chat .bubble.user{background:var(--accent-soft);align-self:flex-end;max-width:88%}.chat .bubble.assistant{background:#f4f4f0;align-self:flex-start;max-width:88%}.attach-list{list-style:none;padding:0;margin:0 0 10px;font-size:13px}.attach-list li{display:flex;align-items:center;gap:8px;padding:4px 0;border-bottom:1px solid var(--line-soft)}.attach-list li:last-child{border-bottom:none}.attach-list .size{color:var(--ink-faint);font-size:12px;margin-left:auto}.thinking{font-size:13px;color:var(--ink-faint);font-style:italic}.login-wrap{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}.login-box{width:100%;max-width:330px}.account-row{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--line-soft)}.account-row:last-child{border-bottom:none}.account-row .email{font-weight:500;font-size:14px}.account-row .detail{font-size:12px;color:var(--ink-faint)}.account-row .spacer{flex:1}.mono{font-family:var(--mono);font-size:12px}