:root { color-scheme: light; font-family: system-ui, sans-serif; background: #f2f4f7; color: #20252b; }
* { box-sizing: border-box; }
body { margin: 0; }
.shell { max-width: 1400px; margin: 0 auto; padding: 24px; }
.hidden { display: none !important; }
.login { max-width: 420px; margin: 15vh auto; background: white; border: 1px solid #d9dee5; border-radius: 8px; padding: 28px; }
h1, h2 { margin: 0; } h1 { font-size: 24px; } h2 { font-size: 17px; }
form { display: grid; gap: 10px; margin-top: 22px; }
input, textarea { width: 100%; border: 1px solid #bcc5d0; border-radius: 5px; padding: 10px; font: inherit; background: white; }
select { font: inherit; padding: 8px; max-width: 100%; border: 1px solid #bcc5d0; border-radius: 5px; background: white; }
.report-scope { display: flex; align-items: center; gap: 12px; margin-top: 24px; }
.arbitration { display: block; margin: 12px 0; text-align: left; width: 100%; }
table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 13px; }
th, td { padding: 8px 4px; text-align: left; border-bottom: 1px solid #e8edf4; overflow-wrap: anywhere; }
.report-block small { display: block; margin-top: 12px; color: #66717d; }
button { border: 0; border-radius: 5px; padding: 9px 14px; background: #1f5eff; color: white; font: inherit; cursor: pointer; }
button.secondary { background: #e8edf4; color: #28323d; padding: 7px 10px; }
button:hover { filter: brightness(.95); }
button:disabled { cursor: default; opacity: .5; }
.pagination, .report-controls { display: flex; gap: 8px; align-items: center; margin-top: 16px; flex-wrap: wrap; }
.pagination { justify-content: space-between; font-size: 12px; }
.report-controls label { font-size: 12px; flex: 1; }
.search-form { margin-top: 14px; }
.search-form label { font-size: 12px; color: #66717d; }
.unread { color: #1f5eff; font-weight: 650; }
.summary-total { font-weight: 650; }
.error { min-height: 1.2em; color: #b3261e; }
.topbar, .section-heading { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.topbar { border-bottom: 1px solid #d9dee5; padding-bottom: 18px; }
.topbar p { margin: 5px 0 0; color: #66717d; }
.instances { display: flex; gap: 8px; overflow-x: auto; padding: 14px 0; }
.instance { white-space: nowrap; background: white; color: #28323d; border: 1px solid #c8d0da; }
.instance.selected { color: white; background: #1f5eff; border-color: #1f5eff; }
.content-grid { display: grid; grid-template-columns: minmax(240px, 320px) 1fr; min-height: 500px; border: 1px solid #d9dee5; background: white; border-radius: 8px; overflow: hidden; }
.chats-panel, .conversation { padding: 16px; min-width: 0; }
.chats-panel { border-right: 1px solid #d9dee5; }
.chat-list { display: grid; gap: 5px; margin-top: 12px; }
.chat { display: grid; gap: 3px; text-align: left; background: #f7f9fb; color: #20252b; border: 1px solid transparent; }
.chat span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: #66717d; font-size: 13px; }
.chat.selected { border-color: #1f5eff; background: #eef3ff; }
.messages { display: grid; gap: 8px; align-content: start; min-height: 350px; max-height: 560px; overflow: auto; padding: 16px 0; }
.message { max-width: 80%; border: 1px solid #d9dee5; border-radius: 6px; padding: 9px 11px; }
.message small { color: #66717d; } .message p { white-space: pre-wrap; margin: 4px 0 0; }
.send-form { grid-template-columns: 1fr auto; align-items: end; } .send-form textarea { resize: vertical; }
.reports { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 16px; }
.report-block { background: white; border: 1px solid #d9dee5; border-radius: 8px; padding: 16px; min-height: 120px; }
.report-block p { margin: 10px 0 0; color: #4d5965; }
@media (max-width: 800px) { .shell { padding: 12px; } .content-grid, .reports { grid-template-columns: 1fr; } .chats-panel { border-right: 0; border-bottom: 1px solid #d9dee5; } .send-form { grid-template-columns: 1fr; } }