:root{--ink:#1f2328;--quiet:#5c6570;--line:#d0d7de;--accent:#1f6feb;--tint:#f3f6fa;--warn:#9a3412;--warn-bg:#fff4e5}*{box-sizing:border-box}body{color:var(--ink);background:#fff;margin:0;font-family:system-ui,-apple-system,Hiragino Sans,Noto Sans JP,sans-serif;line-height:1.7}main{max-width:640px;margin:0 auto;padding:24px 16px 48px}main.wide{max-width:880px}footer{max-width:640px;color:var(--quiet);border-top:1px solid var(--line);margin:0 auto;padding:16px;font-size:13px}h1{margin:0 0 12px;font-size:22px}h2{margin:28px 0 8px;font-size:17px}p{margin:8px 0}a{color:var(--accent)}label{margin:16px 0 4px;font-weight:600;display:block}label small{color:var(--quiet);margin-left:6px;font-weight:400}input[type=text],input[type=date],select,textarea{border:1px solid var(--line);width:100%;font:inherit;background:#fff;border-radius:8px;padding:10px 12px}textarea{resize:vertical;min-height:160px}button{font:inherit;border:1px solid var(--line);cursor:pointer;background:#fff;border-radius:8px;padding:10px 18px}button.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}button:disabled{opacity:.6;cursor:default}.note{color:var(--quiet);font-size:14px}.error{color:#b42318;font-weight:600}.warn{background:var(--warn-bg);color:var(--warn);border:1px solid #f5c58a;border-radius:8px;margin:12px 0;padding:12px 14px}.warn strong{display:block}.row{flex-wrap:wrap;align-items:center;gap:8px;margin-top:12px;display:flex}.qr{width:180px;height:180px;margin:12px 0}.url{word-break:break-all;background:var(--tint);border:1px solid var(--line);border-radius:8px;padding:10px 12px;font-family:ui-monospace,monospace;font-size:13px}.chip{border:1px solid var(--line);vertical-align:middle;border-radius:999px;margin-left:8px;padding:2px 10px;font-size:12px;font-weight:400;display:inline-block}.chip.open{color:#92400e;border-color:#d97706}.chip.replied{color:#166534;border-color:#15803d}.msgs{flex-direction:column;gap:12px;margin:16px 0;display:flex}.msg{border:1px solid var(--line);white-space:pre-wrap;overflow-wrap:anywhere;border-radius:12px;max-width:85%;padding:10px 14px}.msg.mine{background:var(--tint);align-self:flex-end}.msg .meta{color:var(--quiet);margin-bottom:2px;font-size:12px;display:block}table{border-collapse:collapse;width:100%;font-size:14px}th,td{text-align:left;border-bottom:1px solid var(--line);padding:8px 10px}tr.overdue td{background:var(--warn-bg)}.actions{border-top:1px solid var(--line);margin-top:20px;padding-top:4px}.actions form{margin-top:12px}.chat .msgs{margin-top:8px}.chips{flex-wrap:wrap;gap:8px;margin:8px 0 16px;display:flex}.chips button{border-color:var(--accent);color:var(--accent);border-radius:999px}.composer{border-top:1px solid var(--line);margin-top:8px;padding-top:12px}.composer textarea{min-height:120px}a.btn{border:1px solid var(--line);color:var(--ink);background:#fff;border-radius:8px;padding:10px 18px;text-decoration:none;display:inline-block}