/* List-first mailbox; all surfaces follow the existing light/dark tokens. */
.itl3-mailbox{color:var(--ink);min-width:0;font-size:13px}
.mb-head{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:18px}
.mb-head h1{font-size:23px;margin:0}.itl3-mailbox .btn{font-size:12px;line-height:1.4;padding:6px 10px;min-height:30px}
.mb-panel{border:1px solid var(--line);border-radius:8px;background:var(--panel);overflow:hidden;min-width:0}
.mb-toolbar{display:flex;align-items:end;gap:12px;padding:14px 16px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.mb-folders{display:flex;align-self:center;flex-shrink:0;border:1px solid var(--field-line);border-radius:6px;overflow:hidden;margin-right:auto}
.mb-folders .btn{border:0;border-radius:0;background:transparent;color:var(--secondary);white-space:nowrap;padding:7px 12px}
.mb-folders .btn+button{border-left:1px solid var(--line)}.mb-folders [aria-pressed=true]{background:var(--accent-soft);color:var(--ink);font-weight:600}
.mb-filter{display:flex;flex-direction:column;gap:4px;min-width:120px;flex:1 1 135px;max-width:210px;font-size:12px;color:var(--secondary)}
.mb-filter input,.mb-filter select{border:1px solid var(--field-line);border-radius:5px;padding:6px 9px;height:32px;width:100%;background:var(--panel);color:var(--ink);font:inherit}.mb-filter input::placeholder{color:var(--muted)}
.mb-table-scroll{overflow-x:auto}.mb-table{width:100%;border-collapse:collapse;text-align:left;font-size:12px;min-width:780px;margin:0}
.mb-table th{font-size:12px;font-weight:600;color:var(--secondary);background:var(--subtle);padding:10px 14px;border-bottom:1px solid var(--line);white-space:nowrap}
.mb-table td{padding:4px 14px;height:42px;border-bottom:1px solid var(--line);vertical-align:middle;line-height:1.35}.mb-table tbody tr:last-child td{border-bottom:0}.mb-table tbody tr:hover{background:var(--subtle)}
.mb-table time{white-space:nowrap;color:var(--secondary);font-variant-numeric:tabular-nums}.mb-party{color:var(--muted);white-space:nowrap}.mb-from{color:var(--muted);max-width:210px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mb-subject{display:block;border:0;background:transparent;color:var(--ink);font:inherit;font-size:13px;font-weight:600;padding:0;text-align:left;max-width:420px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;cursor:pointer}.mb-subject:hover{text-decoration:underline}
.mb-type{display:block;color:var(--muted);font-size:10px;margin-top:1px}.mb-status{display:inline-block;background:var(--accent-soft);color:var(--secondary);border-radius:4px;padding:3px 6px;font-size:10px;white-space:nowrap}.mb-status-warning{background:var(--warning-soft);color:var(--warning)}
.mb-paging{display:flex;align-items:center;justify-content:space-between;gap:12px;border-top:1px solid var(--line);padding:10px 16px;color:var(--muted);font-size:12px}.mb-scope{font-size:11px;color:var(--muted);padding:0 16px 10px;line-height:1.5}
.mb-table .mb-list-empty{padding:30px 16px;text-align:center;color:var(--muted)}.mb-loading{padding:24px;color:var(--muted)}
.mb-archive-title{padding:16px 16px 0}.mb-archive-title h2{font-size:16px}.mb-archive-title p{font-size:12px;color:var(--muted);margin-top:4px}.mb-detail-nav{margin-bottom:20px}.mb-original{font-size:12px;margin-bottom:14px}
.mb-detail{padding:28px;min-width:0}.mb-detail-head{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.mb-detail-head h2{font-size:20px;line-height:1.4;margin:0;overflow-wrap:anywhere}.mb-detail-head time{font-size:12px;color:var(--muted);white-space:nowrap;padding-top:5px}
.mb-sender{display:flex;align-items:center;gap:12px;margin:22px 0}.mb-avatar{width:36px;height:36px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-weight:600;flex-shrink:0}
.mb-sender strong{font-size:13px;font-weight:600;overflow-wrap:anywhere}.mb-sender small{display:block;font-size:12px;color:var(--muted);margin-top:5px;overflow-wrap:anywhere}
.mb-body{font:14px/1.7 "Segoe UI",-apple-system,Helvetica,Arial,sans-serif;white-space:pre-wrap;overflow-wrap:anywhere;margin:24px 0;background:transparent;border:0;max-height:550px;overflow:auto}
.mb-attachments{display:flex;flex-wrap:wrap;gap:10px;list-style:none;margin:0;padding:0}
.mb-attachments li{display:flex;align-items:center;border:1px solid var(--line);border-radius:8px;max-width:100%;min-width:220px;background:var(--panel)}
.mb-file{display:flex;align-items:center;gap:10px;min-width:0;background:transparent;border:0;padding:12px;text-align:left;cursor:pointer;color:var(--ink);font:inherit}
.mb-file strong{display:block;font-size:12px;font-weight:600;overflow-wrap:anywhere}.mb-file small{display:block;font-size:11px;color:var(--muted);margin-top:5px}.mb-file-icon{font-size:23px;color:var(--accent)}
.mb-download{padding:10px 14px;margin-left:auto;color:var(--accent);text-decoration:none;font-size:20px}.mb-download:hover,.mb-file:hover{background:var(--subtle)}
.mb-route{display:flex;align-items:center;justify-content:space-between;gap:14px;border-top:1px solid var(--line);padding-top:18px;margin-top:28px;font-size:13px;color:var(--secondary)}.mb-route .btn{font-size:13px;flex-shrink:0}
.mb-actions{display:flex;align-items:center;gap:8px}.itl3-mailbox button:disabled{opacity:.5;cursor:default}
.mb-preview{border:1px solid var(--line);border-radius:8px;overflow:hidden;margin:24px 0;background:var(--subtle)}
.mb-preview-head{display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);padding:12px;background:var(--panel)}.mb-preview-head strong{font-size:12px;overflow-wrap:anywhere}.mb-preview-head .btn{font-size:12px;padding:6px 9px}.mb-preview-head span{font-size:12px;white-space:nowrap}
.mb-pdf-page{display:block;max-width:100%;height:auto;margin:0 auto;background:white}.mb-preview .mb-body{padding:16px;margin:0}
.mb-error{border:1px solid #edc9c9;border-radius:8px;background:var(--red-soft);color:var(--red);padding:14px 18px;margin-bottom:18px;font-size:13px;overflow-wrap:anywhere}
.mb-empty{padding:110px 20px;text-align:center;color:var(--muted)}.mb-empty h2{font-size:19px;color:var(--ink)}.mb-empty p{font-size:13px;line-height:1.6}

.mb-error{border-color:var(--red)}.mb-error .btn{margin-left:12px}.mb-actions{flex-wrap:wrap}
@media(max-width:1050px){.mb-toolbar{gap:10px}.mb-folders{margin-right:0}.mb-filter{max-width:none}.mb-detail{padding:22px}}
@media(max-width:700px){.mb-head{align-items:flex-start;flex-wrap:wrap}.mb-head h1{font-size:22px}.mb-toolbar{padding:12px}.mb-folders{width:100%;margin-bottom:2px}.mb-folders .btn{flex:1}.mb-filter{flex:1 1 150px}.mb-paging{align-items:flex-start;flex-wrap:wrap;padding:10px 12px}.mb-scope{padding:0 12px 10px}.mb-detail{padding:18px}.mb-detail-head,.mb-preview-head,.mb-route{align-items:flex-start;flex-direction:column}.mb-detail-head{gap:5px}.mb-head>.mb-actions{gap:6px}}
@media(prefers-reduced-motion:no-preference){.mb-folders button{transition:background .12s ease}}