:root{--bg: #f4f6fb;--panel: #ffffff;--border: rgba(15, 23, 42, .1);--text: #0f172a;--muted: rgba(15, 23, 42, .55);--brand: #2563eb;--brand-dark: #1d4ed8}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--text);background:var(--bg)}.login-screen{min-height:100%;display:flex;align-items:center;justify-content:center;padding:20px}.login-card{width:100%;max-width:380px;background:var(--panel);border-radius:18px;padding:34px 30px;box-shadow:0 20px 50px #0f172a1f;display:flex;flex-direction:column}.login-brand{font-size:.78rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--brand)}.login-card h1{margin:6px 0 4px;font-size:1.5rem}.login-sub{margin:0 0 22px;color:var(--muted);font-size:.9rem}.login-card label{font-size:.82rem;font-weight:600;color:var(--muted);margin-bottom:6px}.login-card input{padding:12px 14px;border-radius:10px;border:1.5px solid var(--border);font-size:.95rem;margin-bottom:16px}.login-card input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px #2563eb24}.login-card button{padding:13px;border-radius:10px;border:none;cursor:pointer;background:var(--brand);color:#fff;font-weight:700;font-size:.95rem}.login-card button:hover:not(:disabled){background:var(--brand-dark)}.login-card button:disabled{opacity:.6;cursor:not-allowed}.login-error{color:#dc2626;font-size:.82rem;margin-bottom:14px}.dash{display:grid;grid-template-columns:320px 1fr;height:100%}@media (max-width: 720px){.dash{grid-template-columns:1fr}}.dash-sidebar{border-right:1px solid var(--border);background:var(--panel);display:flex;flex-direction:column;min-height:0}.dash-top{display:flex;align-items:center;justify-content:space-between;padding:18px 18px 10px}.dash-brand{font-weight:700}.dash-logout{background:none;border:none;color:var(--muted);cursor:pointer;font-size:.82rem}.dash-logout:hover{color:var(--brand)}.dash-status{display:flex;align-items:center;gap:7px;padding:0 18px 12px;font-size:.8rem;color:var(--muted);border-bottom:1px solid var(--border)}.dot{width:8px;height:8px;border-radius:999px;background:#22c55e}.dot.off{background:#f59e0b}.conv-list{flex:1;overflow-y:auto;min-height:0}.conv-empty{padding:24px 18px;color:var(--muted);font-size:.88rem}.conv-item{width:100%;text-align:left;background:none;border:none;cursor:pointer;padding:14px 18px;border-bottom:1px solid var(--border);display:flex;flex-direction:column;gap:5px}.conv-item:hover{background:#2563eb0a}.conv-item.active{background:#2563eb17}.conv-row{display:flex;align-items:center;justify-content:space-between;gap:10px}.conv-name{font-weight:600;font-size:.92rem}.conv-time{font-size:.72rem;color:var(--muted);flex:0 0 auto}.conv-preview{font-size:.82rem;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conv-badge{flex:0 0 auto;min-width:20px;height:20px;padding:0 6px;border-radius:999px;background:var(--brand);color:#fff;font-size:.72rem;font-weight:700;display:inline-flex;align-items:center;justify-content:center}.dash-main{display:flex;flex-direction:column;min-height:0}.dash-placeholder{flex:1;display:flex;align-items:center;justify-content:center;color:var(--muted);text-align:center}.dash-placeholder-icon{font-size:2.4rem;margin-bottom:8px}.chat-header{padding:16px 22px;border-bottom:1px solid var(--border);background:var(--panel)}.chat-title{font-weight:700}.chat-meta{font-size:.8rem;color:var(--muted);margin-top:2px}.chat-body{flex:1;overflow-y:auto;min-height:0;padding:20px 22px;display:flex;flex-direction:column;gap:10px}.bubble{max-width:66%;padding:10px 14px;border-radius:14px;font-size:.92rem;line-height:1.45;white-space:pre-wrap;word-break:break-word}.bubble .bubble-time{font-size:.68rem;opacity:.6;margin-top:4px}.bubble.visitor{align-self:flex-start;background:var(--panel);border:1px solid var(--border);border-bottom-left-radius:4px}.bubble.agent{align-self:flex-end;background:var(--brand);color:#fff;border-bottom-right-radius:4px}.bubble.agent .bubble-time{color:#ffffffd9}.bubble.system{align-self:center;background:transparent;color:var(--muted);font-size:.78rem}.bubble.typing{opacity:.6;font-style:italic}.chat-composer{display:flex;gap:10px;padding:14px 18px;border-top:1px solid var(--border);background:var(--panel)}.chat-composer input{flex:1;padding:12px 16px;border-radius:999px;border:1.5px solid var(--border);font-size:.92rem;background:var(--bg)}.chat-composer input:focus{outline:none;border-color:var(--brand);background:#fff}.chat-composer button{padding:0 22px;border-radius:999px;border:none;cursor:pointer;background:var(--brand);color:#fff;font-weight:700}.chat-composer button:hover:not(:disabled){background:var(--brand-dark)}.chat-composer button:disabled{opacity:.5;cursor:not-allowed}