:root{--yellow: #FFD700;--blue: #1565C0;--blue-hover: #1976D2;--bg: #1A1A1A;--bg-deep: #111;--surface: #242424;--surface-hover: #2d2d2d;--border: #2f2f2f;--text: #e8e8e8;--muted: #8a8a8a;--bubble-in: #262626;--bubble-out: #1565C0;--success: #4caf50;--danger: #e53935}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg-deep);color:var(--text);-webkit-font-smoothing:antialiased}.app{display:grid;grid-template-columns:360px 1fr;height:100vh;overflow:hidden}.sidebar{background:var(--bg);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}.sidebar-header{padding:18px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:12px}.brand{display:flex;align-items:center;gap:12px}.brand-mark{width:40px;height:40px;border-radius:10px;background:var(--yellow);color:#111;display:grid;place-items:center;font-weight:800;font-size:14px;letter-spacing:.02em}.brand h1{margin:0;font-size:16px;font-weight:700;letter-spacing:.01em}.brand-sub{font-size:10.5px;color:var(--muted);letter-spacing:.08em;text-transform:uppercase;margin-top:2px}.conversas-list{flex:1;overflow-y:auto}.placeholder{padding:24px 20px;color:var(--muted);font-size:13px;text-align:center}.conversa-item{padding:14px 20px;border-bottom:1px solid var(--border);cursor:pointer;display:flex;gap:12px;align-items:center;transition:background .12s}.conversa-item:hover{background:var(--surface-hover)}.conversa-item.active{background:var(--surface);border-left:3px solid var(--yellow);padding-left:17px}.conversa-avatar,.chat-header-avatar{width:42px;height:42px;border-radius:50%;background:var(--surface);color:var(--yellow);display:grid;place-items:center;font-weight:600;font-size:14px;flex-shrink:0;border:1px solid var(--border)}.conversa-info{flex:1;min-width:0}.conversa-top{display:flex;justify-content:space-between;align-items:baseline;gap:8px}.conversa-nome{font-weight:600;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conversa-hora{font-size:11px;color:var(--muted);flex-shrink:0}.conversa-preview{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:3px}.conversa-preview .pref{color:var(--yellow);font-weight:500}.chat{display:flex;flex-direction:column;background:var(--bg-deep);overflow:hidden}.chat-empty{display:grid;place-items:center;height:100%;color:var(--muted);text-align:center;padding:40px}.chat-empty h2{color:var(--yellow);font-weight:700;margin:16px 0 8px;font-size:22px}.chat-empty p{margin:0;font-size:14px}.chat-empty-mark{width:64px;height:64px;border-radius:16px;background:var(--yellow);color:#111;display:grid;place-items:center;font-weight:800;font-size:22px;margin:0 auto}.chat-header{padding:14px 24px;border-bottom:1px solid var(--border);background:var(--bg);display:flex;align-items:center;justify-content:space-between;gap:16px}.chat-header-left{display:flex;gap:12px;align-items:center}.chat-header-name{font-weight:600;font-size:15px}.chat-header-phone{font-size:12px;color:var(--muted);margin-top:2px}.window-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;font-size:12px;font-weight:500;white-space:nowrap}.window-badge.open{background:#4caf501f;color:var(--success);border:1px solid rgba(76,175,80,.3)}.window-badge.closed{background:#e539351a;color:var(--danger);border:1px solid rgba(229,57,53,.3)}.window-dot{width:7px;height:7px;border-radius:50%;background:currentColor}.messages{flex:1;overflow-y:auto;padding:20px 24px;display:flex;flex-direction:column;gap:6px}.bubble-row{display:flex}.bubble-row.out{justify-content:flex-end}.bubble{max-width:68%;padding:8px 12px 6px;border-radius:10px;font-size:14px;line-height:1.45;word-wrap:break-word}.bubble.in{background:var(--bubble-in);color:var(--text);border-bottom-left-radius:4px}.bubble.out{background:var(--bubble-out);color:#fff;border-bottom-right-radius:4px}.bubble-text{white-space:pre-wrap}.bubble-time{font-size:10px;margin-top:4px;opacity:.7;text-align:right}.composer{padding:14px 20px;border-top:1px solid var(--border);background:var(--bg);display:flex;gap:12px;align-items:flex-end}.composer textarea{flex:1;resize:none;background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:10px;padding:10px 14px;font-family:inherit;font-size:14px;line-height:1.4;min-height:42px;max-height:140px;outline:none;transition:border-color .15s}.composer textarea:focus{border-color:var(--yellow)}.composer textarea:disabled{opacity:.6}.composer button{background:var(--yellow);color:#111;border:none;width:44px;height:44px;border-radius:50%;cursor:pointer;font-size:18px;display:grid;place-items:center;font-weight:700;flex-shrink:0;transition:transform .1s,opacity .15s}.composer button:disabled{opacity:.35;cursor:not-allowed}.composer button:hover:not(:disabled){transform:scale(1.06)}.composer-closed{padding:16px 20px;border-top:1px solid var(--border);background:var(--bg);color:var(--muted);text-align:center;font-size:13px;line-height:1.5}@media (max-width: 720px){.app{grid-template-columns:1fr}.sidebar{display:none}}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#333;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#444}