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.h-step-kind{background:#10b9811f;color:#047857}.kind-handoff .h-step-kind{background:#ec48991f;color:#be185d}.h-step-conn{width:2px;height:16px;background:var(--border);margin:0 auto}.h-add-step{display:flex;align-items:center;justify-content:center;gap:6px;padding:10px;width:100%;border:1px dashed var(--border);background:transparent;border-radius:var(--radius-md);color:var(--text-muted);font-size:13px;font-weight:600;cursor:pointer;transition:border-color .15s ease,color .15s ease,background .15s ease}.h-add-step:hover{border-color:var(--primary);color:var(--primary);background:#6366f10a}.h-search{position:relative;flex:1;max-width:320px}.h-search input{padding-left:36px}.h-search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--text-muted)}.h-chip{display:inline-flex;align-items:center;gap:4px;padding:6px 12px;border-radius:999px;background:var(--surface);border:1px solid var(--border);font-size:12px;font-weight:600;color:var(--text-muted);cursor:pointer;transition:all .15s ease}.h-chip:hover{border-color:var(--primary);color:var(--primary)}.h-chip.active{background:var(--grad-primary);color:#fff;border-color:transparent;box-shadow:0 2px 8px #6366f14d}.h-channels-wrap{display:grid;grid-template-columns:260px 1fr;gap:16px;height:calc(100vh - var(--header-h) - 48px)}.h-channel-list{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;display:flex;flex-direction:column}.h-channel-item{padding:10px 16px;cursor:pointer;font-size:14px;color:var(--text);display:flex;align-items:center;gap:8px;border-left:3px solid transparent;transition:background .15s ease}.h-channel-item:hover{background:var(--surface-muted)}.h-channel-item.active{background:#6366f114;border-left-color:var(--primary);color:var(--primary);font-weight:600}.h-channel-hash{color:var(--text-dim)}.h-channel-item.active .h-channel-hash{color:var(--primary)}.h-thread{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);display:flex;flex-direction:column;overflow:hidden}.h-thread-header{padding:14px 20px;border-bottom:1px solid var(--border);background:var(--grad-card-hover)}.h-thread-body{flex:1;overflow-y:auto;padding:16px 20px;display:flex;flex-direction:column;gap:12px}.h-msg{display:flex;gap:10px}.h-msg-bubble{background:var(--surface-muted);padding:8px 12px;border-radius:10px;font-size:13px;max-width:70%;border:1px solid var(--border)}.h-msg-meta{font-size:11px;color:var(--text-dim);margin-bottom:2px}.h-thread-input{padding:12px 16px;border-top:1px solid var(--border);display:flex;gap:8px;background:#fff}.h-empty{padding:40px 24px;text-align:center;color:var(--text-muted);font-size:13px}.h-empty-title{font-size:15px;font-weight:600;color:var(--text);margin-bottom:4px}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-thumb{background:#6366f133;border-radius:999px}::-webkit-scrollbar-thumb:hover{background:#6366f166}