:root{color-scheme:light;font-family:Inter,Arial,sans-serif}*{box-sizing:border-box}body{margin:0;color:#111827;background:#f3f4f6}.page{min-height:100vh}.auth-page{display:grid;place-items:center;padding:24px}.auth-card{width:100%;max-width:420px;background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:24px;display:flex;flex-direction:column;gap:12px}.auth-card h1{margin:0;font-size:24px}label{display:flex;flex-direction:column;gap:6px;font-size:14px}input,textarea,select,button{font:inherit}input,textarea,select{width:100%;border:1px solid #d1d5db;border-radius:8px;padding:10px 12px;background:#fff}textarea{resize:vertical}button{border:0;border-radius:8px;padding:10px 14px;background:#111827;color:#fff;cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}.muted{margin:0;color:#6b7280;font-size:13px}.error{border:1px solid #fecaca;background:#fef2f2;color:#b91c1c;border-radius:8px;padding:10px;font-size:13px}.app-page{display:flex;flex-direction:column;height:100vh}.topbar{border-bottom:1px solid #e5e7eb;background:#fff;padding:12px 18px;display:flex;align-items:center;justify-content:space-between;gap:12px}.topbar h1{margin:0;font-size:20px}.topbar-actions{display:flex;align-items:center;gap:8px}.topbar-actions select{width:120px}.top-error{margin:12px 18px 0}.chat-layout{flex:1;min-height:0;display:grid;grid-template-columns:340px 1fr;gap:1px;background:#d1d5db}.chat-list,.chat-panel{min-height:0;background:#fff}.chat-list{overflow:auto;padding:10px}.chat-list-item{width:100%;text-align:left;background:#fff;color:#111827;border:1px solid #e5e7eb;border-radius:10px;margin-bottom:10px;padding:10px}.chat-list-item.active{border-color:#2563eb;background:#eff6ff}.chat-list-item-top,.chat-list-item-bottom{display:flex;align-items:center;justify-content:space-between;gap:8px}.status-pill{font-size:11px;text-transform:uppercase;border-radius:999px;padding:3px 8px;font-weight:700}.status-pill.open{background:#dcfce7;color:#166534}.status-pill.closed{background:#fee2e2;color:#991b1b}.last-message{margin:6px 0;font-size:13px;color:#1f2937}.unread-count{min-width:22px;text-align:center;padding:2px 6px;border-radius:999px;background:#111827;color:#fff;font-size:12px;font-weight:700}.chat-panel{display:grid;grid-template-rows:auto 1fr auto}.chat-panel-header{border-bottom:1px solid #e5e7eb;padding:12px 16px;display:flex;justify-content:space-between;gap:12px;align-items:center}.chat-panel-header h2{margin:0 0 4px;font-size:18px}.messages{overflow:auto;padding:16px;display:flex;flex-direction:column;gap:10px}.message-row{display:flex}.message-row.customer{justify-content:flex-start}.message-row.operator{justify-content:flex-end}.message-bubble{max-width:75%;border-radius:12px;padding:10px 12px;border:1px solid #e5e7eb}.message-row.customer .message-bubble{background:#f9fafb}.message-row.operator .message-bubble{background:#111827;color:#fff}.message-bubble p{margin:0;white-space:pre-wrap}.message-bubble small{display:block;margin-top:6px;opacity:.7}.composer{border-top:1px solid #e5e7eb;padding:12px;display:grid;grid-template-columns:1fr auto;gap:10px}.empty{color:#6b7280;font-size:14px;padding:16px}@media(max-width:980px){.chat-layout{grid-template-columns:1fr;grid-template-rows:38% 62%}}