:root{
  --navy:#2c3c56;
  --blue:#5578a3;
  --paper:#f6f5f1;
  --panel:#fff;
  --line:#dcd9d0;
  --muted:#5c6b82;
  --soft:#edf1f6;
  --success:#237a4b;
  --danger:#b23b32;
}
*{box-sizing:border-box}
body{margin:0;min-height:100vh;font-family:'IBM Plex Sans',Arial,sans-serif;background:var(--paper);color:var(--navy)}
header{background:var(--navy);color:#fff;padding:20px 24px}
.header-inner{max-width:1180px;margin:auto;display:flex;justify-content:space-between;align-items:center;gap:18px}
.page-brand{display:flex;align-items:center;gap:12px}.page-brand img{width:48px;height:48px}.page-brand small{display:block;text-transform:uppercase;letter-spacing:.12em;opacity:.72;font-weight:600;margin-bottom:4px}.page-brand h1{margin:0;font-size:23px}
.header-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.header-actions span{font-size:13px;opacity:.8}
button,.link-btn{border:0;border-radius:7px;padding:10px 14px;background:var(--navy);color:#fff;font:600 14px 'IBM Plex Sans',sans-serif;cursor:pointer;text-decoration:none;display:inline-block}
header button,header .link-btn{border:1px solid rgba(255,255,255,.3);background:rgba(255,255,255,.08)}
button:hover,.link-btn:hover{background:var(--blue)}
main{max-width:1180px;margin:28px auto 70px;padding:0 24px}
.notice{padding:13px 15px;border:1px solid #cbd6e3;background:#f4f7fa;border-radius:9px;color:var(--muted);font-size:13px;line-height:1.5;margin-bottom:18px}.notice strong{color:var(--navy)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px;box-shadow:0 8px 26px rgba(44,60,86,.06)}
.archive-grid{display:grid;grid-template-columns:320px minmax(0,1fr);gap:22px;align-items:start}
.categories{display:flex;flex-direction:column;gap:9px}.category-btn{width:100%;text-align:left;border:1px solid var(--line);background:#fff;color:var(--navy);border-radius:9px;padding:13px 14px;display:flex;justify-content:space-between;align-items:center;gap:10px}.category-btn:hover,.category-btn.active{background:var(--soft);border-color:#bac8d8}.category-copy strong{display:block;font-size:14px}.category-copy span{display:block;margin-top:3px;font-size:12px;color:var(--muted);line-height:1.35}.category-count{font-size:12px;font-weight:700;background:var(--soft);padding:5px 8px;border-radius:20px;white-space:nowrap}
.toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:14px}.toolbar input{flex:1;min-width:220px;border:1px solid var(--line);border-radius:7px;padding:10px 11px;font:14px 'IBM Plex Sans',sans-serif;color:var(--navy)}.toolbar select{border:1px solid var(--line);border-radius:7px;padding:10px 11px;background:#fff;color:var(--navy)}
.section-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;margin-bottom:15px}.section-head h2{margin:0 0 5px;font-size:20px}.section-head p{margin:0;color:var(--muted);font-size:13px}.readonly{font-size:11px;font-weight:700;background:#e6e8ec;color:#596273;border-radius:20px;padding:6px 9px;white-space:nowrap}
.ticket-table-wrap{overflow:auto;border:1px solid var(--line);border-radius:9px}.ticket-table{width:100%;border-collapse:collapse;min-width:760px}.ticket-table th,.ticket-table td{padding:11px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.ticket-table th{font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);background:#fafafa}.ticket-table td{font-size:13px}.ticket-table tr:last-child td{border-bottom:0}.ticket-id{font-weight:700;color:var(--blue);white-space:nowrap}.ticket-subject{font-weight:600}.muted{color:var(--muted)}
.empty,.error-box{padding:28px 16px;text-align:center;border:1px dashed var(--line);border-radius:9px;color:var(--muted)}.error-box{color:var(--danger);background:#fff0ee;border-style:solid;border-color:#edc4bf}.loading{opacity:.72}
.pagination{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:14px;font-size:13px;color:var(--muted)}.pagination-actions{display:flex;gap:8px}.pagination button{padding:8px 11px}.pagination button:disabled{opacity:.45;cursor:not-allowed}
.detail-card{background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 8px 26px rgba(44,60,86,.06);overflow:hidden}.detail-summary{padding:20px 22px;border-bottom:1px solid var(--line)}.detail-summary h2{margin:4px 0 8px;font-size:21px}.detail-meta{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px 16px;color:var(--muted);font-size:13px;line-height:1.5}.detail-meta strong{color:var(--navy)}
.fields{padding:18px 22px;border-bottom:1px solid var(--line);display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.field-box{background:#f7f8fa;border:1px solid #e4e7eb;border-radius:8px;padding:10px 11px}.field-box small{display:block;color:var(--muted);font-weight:700;margin-bottom:4px}.field-box div{font-size:13px;word-break:break-word}
.timeline{padding:20px 22px;background:#f2f3f5}.message-item{background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 15px;margin-bottom:12px}.message-head{display:flex;justify-content:space-between;gap:12px;font-size:12px;color:var(--muted);margin-bottom:9px}.message-author{font-weight:700;color:var(--navy)}.message-text{white-space:pre-wrap;line-height:1.55;font-size:14px}.attachments{margin-top:12px;display:flex;flex-direction:column;gap:7px}.attachment{display:flex;justify-content:space-between;align-items:center;gap:12px;border-top:1px solid #ececec;padding-top:8px;font-size:13px}.attachment a{color:var(--blue);font-weight:700;text-decoration:none}.attachment a:hover{text-decoration:underline}.attachment-note{color:var(--muted);font-size:12px}.attachment.skipped{color:var(--muted)}
@media(max-width:850px){.archive-grid{grid-template-columns:1fr}.detail-meta,.fields{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.header-inner{align-items:flex-start;flex-direction:column}.detail-meta,.fields{grid-template-columns:1fr}.toolbar{align-items:stretch}.toolbar input,.toolbar select{width:100%}.pagination{align-items:flex-start;flex-direction:column}}