:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#1f1f1f;background:#f5f7fb;--ant-blue: #1677ff;--ant-border: #d9d9d9;--ant-text-secondary: #6b7280;--ant-success: #52c41a;--ant-error: #ff4d4f;--ant-radius: 10px;--shadow-card: 0 10px 30px rgba(15, 23, 42, .08)}*{box-sizing:border-box}body{margin:0;min-height:100vh}button,textarea{font:inherit}button{border:0;cursor:pointer}.app-shell{min-height:100vh;display:grid;grid-template-columns:310px minmax(0,1fr);grid-template-rows:68px minmax(0,1fr)}.topbar{grid-column:1 / -1;height:68px;background:#fff;border-bottom:1px solid var(--ant-border);display:flex;align-items:center;gap:14px;padding:0 24px;box-shadow:0 2px 10px #0f172a0a}.brand-mark,.avatar{width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,#1677ff,#69b1ff);color:#fff;display:grid;place-items:center;font-weight:800}.topbar h1{margin:0;font-size:18px}.topbar p{margin:2px 0 0;color:var(--ant-text-secondary);font-size:12px}.topbar .ghost{margin-left:auto}.sidebar{background:#fff;border-right:1px solid var(--ant-border);padding:18px;overflow-y:auto}.profile-card{border:1px solid var(--ant-border);border-radius:var(--ant-radius);padding:14px;display:flex;gap:12px;align-items:center;margin-bottom:18px}.profile-card span,.customer-list span,.customer-list em{display:block;color:var(--ant-text-secondary);font-size:12px;font-style:normal}.side-title{font-weight:700;font-size:13px;margin:8px 0;color:#374151}.customer-list{display:grid;gap:8px}.customer-list button{text-align:left;border:1px solid transparent;border-radius:var(--ant-radius);background:#f8fafc;padding:12px;transition:.15s ease}.customer-list button:hover{border-color:#91caff;background:#f0f7ff}.customer-list button.active{border-color:var(--ant-blue);background:#e6f4ff;box-shadow:inset 3px 0 0 var(--ant-blue)}.main-panel{padding:20px;display:flex;flex-direction:column;min-width:0;min-height:0}.chat-header{background:#fff;border:1px solid var(--ant-border);border-radius:14px;padding:16px;display:flex;justify-content:space-between;gap:20px;box-shadow:var(--shadow-card)}.chat-header h2{margin:0 0 4px}.chat-header p{margin:0 0 8px;color:var(--ant-text-secondary)}.chat-header code{background:#f5f5f5;color:#455468;padding:4px 8px;border-radius:6px;font-size:12px}.summary-card{min-width:220px;border-left:1px solid var(--ant-border);padding-left:18px;display:grid;gap:2px}.summary-card span,.summary-card small{color:var(--ant-text-secondary);font-size:12px}.timeline{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:10px;padding:16px 2px}.bubble{max-width:760px;border:1px solid var(--ant-border);border-radius:14px;padding:12px 14px;background:#fff;box-shadow:0 4px 18px #0f172a0d}.bubble.customer{align-self:flex-start;border-color:#91caff;background:#f0f7ff}.bubble.seller{align-self:flex-end;border-color:#b7eb8f;background:#f6ffed}.bubble.system{align-self:center;width:min(760px,100%);background:#fafafa}.bubble.approval-event{align-self:center;width:min(760px,100%);border-color:#ffd591;background:#fff7e6}.bubble header{display:flex;gap:8px;align-items:center;margin-bottom:6px;color:var(--ant-text-secondary);font-size:12px}.bubble header span{font-weight:700;color:#374151}.bubble p{white-space:pre-wrap;margin:0;line-height:1.55}pre{white-space:pre-wrap;word-break:break-word;background:#111827;color:#e5e7eb;border-radius:8px;padding:10px;font-size:12px;max-height:260px;overflow:auto}.approval-dock{background:#fff;border:1px solid #ffd591;border-radius:14px;padding:12px;box-shadow:var(--shadow-card);margin-bottom:12px}.approval-dock h3{margin:0 0 10px;font-size:15px}.approval-card{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;border-top:1px solid #ffe7ba;padding-top:10px;margin-top:10px}.approval-card textarea{width:100%;min-height:54px;border:1px solid var(--ant-border);border-radius:8px;padding:8px;resize:vertical}.approval-actions{display:flex;gap:8px;align-items:start}.composer{background:#fff;border:1px solid var(--ant-border);border-radius:14px;padding:12px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px;box-shadow:var(--shadow-card)}.composer textarea{min-height:66px;resize:vertical;border:1px solid var(--ant-border);border-radius:10px;padding:10px 12px;outline:none}.composer textarea:focus{border-color:var(--ant-blue);box-shadow:0 0 0 3px #1677ff1f}.primary,.ghost,.danger,.link{border-radius:8px;padding:9px 14px;font-weight:700}.primary{background:var(--ant-blue);color:#fff}.danger{background:var(--ant-error);color:#fff}.ghost{background:#f5f5f5;color:#1f1f1f;border:1px solid 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