*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

  :root {
    --bg: #0a0c10;
    --surface: #0f1218;
    --surface2: #161b24;
    --surface3: #1d2535;
    --border: #252d3d;
    --border-bright: #2e3a50;
    --accent: #00e5ff;
    --accent2: #7c3aed;
    --accent3: #10b981;
    --warn: #f59e0b;
    --danger: #ef4444;
    --text: #e2e8f0;
    --text-dim: #64748b;
    --text-muted: #374151;
    --mono: 'JetBrains Mono', monospace;
    --sans: 'Syne', sans-serif;
  }

  body {
    font-family: var(--mono);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
  }

  /* Grid background */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
      linear-gradient(rgba(0,229,255,0.025) 1px, transparent 1px),
      linear-gradient(90deg, rgba(0,229,255,0.025) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: 0;
  }

  .app {
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
    display: grid;
    grid-template-rows: auto 1fr;
    min-height: 100vh;
    gap: 20px;
  }

  /* HEADER */
  header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
  }

  .logo {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
  }

  .logo-text {
    font-family: var(--sans);
    font-size: 18px;
    font-weight: 800;
    letter-spacing: -0.02em;
  }

  .logo-text span { color: var(--accent); }

  .status-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border: 1px solid var(--border);
    background: var(--surface2);
    transition: all 0.3s;
  }

  .status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--text-dim);
    transition: all 0.3s;
  }

  .status-badge.connected { border-color: var(--accent3); color: var(--accent3); }
  .status-badge.connected .status-dot { background: var(--accent3); box-shadow: 0 0 8px var(--accent3); animation: pulse 2s infinite; }
  .status-badge.connecting { border-color: var(--warn); color: var(--warn); }
  .status-badge.connecting .status-dot { background: var(--warn); animation: pulse 0.8s infinite; }
  .status-badge.error { border-color: var(--danger); color: var(--danger); }
  .status-badge.error .status-dot { background: var(--danger); }

  @keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
  }

  /* MAIN GRID */
  .main-grid {
    display: grid;
    grid-template-columns: 380px 1fr;
    grid-template-rows: auto auto 1fr;
    gap: 16px;
  }

  /* PANELS */
  .panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
  }

  .panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    background: var(--surface2);
  }

  .panel-title {
    font-family: var(--sans);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-dim);
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .panel-title .dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--accent);
  }

  .panel-body { padding: 16px; }

  /* CONNECTION PANEL */
  .connection-panel { grid-column: 1; grid-row: 1 / 4; }

  /* FORM ELEMENTS */
  .field { margin-bottom: 14px; }

  label {
    display: block;
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 6px;
  }

  input, select, textarea {
    width: 100%;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 9px 12px;
    font-family: var(--mono);
    font-size: 12px;
    color: var(--text);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
  }

  input:focus, select:focus, textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(0,229,255,0.1);
  }

  select option { background: var(--surface2); }
  textarea { resize: vertical; min-height: 70px; font-size: 11px; }

  /* KV PAIRS */
  .kv-list { display: flex; flex-direction: column; gap: 6px; }

  .kv-row {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 6px;
    align-items: center;
  }

  .kv-row input { margin: 0; }

  .btn-icon {
    width: 30px; height: 30px;
    border: 1px solid var(--border);
    background: var(--surface2);
    border-radius: 6px;
    color: var(--text-dim);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    font-size: 16px;
    transition: all 0.2s;
    flex-shrink: 0;
  }

  .btn-icon:hover { border-color: var(--danger); color: var(--danger); background: rgba(239,68,68,0.1); }

  .btn-add {
    width: 100%;
    padding: 7px;
    background: transparent;
    border: 1px dashed var(--border-bright);
    border-radius: 6px;
    color: var(--text-dim);
    font-family: var(--mono);
    font-size: 11px;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 6px;
  }

  .btn-add:hover { border-color: var(--accent); color: var(--accent); background: rgba(0,229,255,0.05); }

  /* BUTTONS */
  .btn {
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    font-family: var(--mono);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    letter-spacing: 0.05em;
    display: flex; align-items: center; gap: 8px; justify-content: center;
  }

  .btn-primary {
    background: linear-gradient(135deg, var(--accent), #0099cc);
    color: #000;
    font-weight: 700;
    box-shadow: 0 0 20px rgba(0,229,255,0.2);
  }

  .btn-primary:hover { box-shadow: 0 0 30px rgba(0,229,255,0.4); transform: translateY(-1px); }
  .btn-primary:disabled { opacity: 0.4; cursor: not-allowed; transform: none; box-shadow: none; }

  .btn-danger {
    background: rgba(239,68,68,0.15);
    border: 1px solid var(--danger);
    color: var(--danger);
  }

  .btn-danger:hover { background: rgba(239,68,68,0.25); }

  .btn-secondary {
    background: var(--surface2);
    border: 1px solid var(--border-bright);
    color: var(--text);
  }

  .btn-secondary:hover { border-color: var(--accent2); color: var(--accent2); }

  .btn-group { display: flex; gap: 8px; margin-top: 16px; }
  .btn-group .btn { flex: 1; }

  /* DIVIDER */
  .divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 16px 0;
  }

  .section-label {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent2);
    margin-bottom: 10px;
    display: flex; align-items: center; gap: 6px;
  }

  .section-label::before {
    content: '';
    display: block;
    width: 3px; height: 12px;
    background: var(--accent2);
    border-radius: 2px;
  }

  /* EMIT PANEL */
  .emit-panel { grid-column: 2; grid-row: 1; }

  /* EMIT ACTIONS */
  .emit-row {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 10px;
    align-items: end;
  }

  .emit-row .btn { white-space: nowrap; }

  /* LISTENERS PANEL */
  .listeners-panel { grid-column: 2; grid-row: 2; }

  .listeners-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
  }

  .listener-tag {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px 4px 4px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 11px;
    animation: tagIn 0.2s ease;
  }

  @keyframes tagIn {
    from { transform: scale(0.8); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
  }

  .listener-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--accent3);
    box-shadow: 0 0 6px var(--accent3);
    animation: pulse 2s infinite;
    flex-shrink: 0;
  }

  .listener-tag .rm {
    background: none; border: none; color: var(--text-dim);
    cursor: pointer; font-size: 14px; line-height: 1;
    padding: 0; transition: color 0.2s;
  }

  .listener-tag .rm:hover { color: var(--danger); }

  /* LOGS PANEL */
  .logs-panel { grid-column: 2; grid-row: 3; display: flex; flex-direction: column; max-height: 275px; }

  #log-container {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
    font-size: 11px;
    line-height: 1.7;
    max-height: 420px;
    scroll-behavior: smooth;
  }

  #log-container::-webkit-scrollbar { width: 4px; }
  #log-container::-webkit-scrollbar-track { background: transparent; }
  #log-container::-webkit-scrollbar-thumb { background: var(--border-bright); border-radius: 4px; }

  .log-entry {
    display: grid;
    grid-template-columns: 80px 90px 1fr;
    gap: 8px;
    padding: 6px 8px;
    border-radius: 6px;
    margin-bottom: 3px;
    animation: logIn 0.2s ease;
    border-left: 2px solid transparent;
  }

  @keyframes logIn {
    from { opacity: 0; transform: translateX(-8px); }
    to { opacity: 1; transform: translateX(0); }
  }

  .log-entry:hover { background: var(--surface2); }

  .log-entry.type-connect { border-left-color: var(--accent3); }
  .log-entry.type-disconnect { border-left-color: var(--danger); }
  .log-entry.type-emit { border-left-color: var(--accent); }
  .log-entry.type-receive { border-left-color: var(--accent2); }
  .log-entry.type-error { border-left-color: var(--danger); background: rgba(239,68,68,0.05); }
  .log-entry.type-info { border-left-color: var(--text-dim); }

  .log-time { color: var(--text-muted); font-size: 10px; }

  .log-badge {
    display: inline-block;
    padding: 1px 7px;
    border-radius: 4px;
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-align: center;
  }

  .badge-connect { background: rgba(16,185,129,0.15); color: var(--accent3); }
  .badge-disconnect { background: rgba(239,68,68,0.15); color: var(--danger); }
  .badge-emit { background: rgba(0,229,255,0.15); color: var(--accent); }
  .badge-receive { background: rgba(124,58,237,0.15); color: #a78bfa; }
  .badge-error { background: rgba(239,68,68,0.2); color: var(--danger); }
  .badge-info { background: rgba(100,116,139,0.2); color: var(--text-dim); }

  .log-message { color: var(--text); word-break: break-all; }
  .log-message .event-name { color: var(--warn); }
  .log-message .data { color: var(--text-dim); }

  .logs-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-top: 1px solid var(--border);
    background: var(--surface2);
  }

  .log-count {
    font-size: 10px;
    color: var(--text-dim);
    margin-left: auto;
  }

  .btn-xs {
    padding: 4px 10px;
    font-size: 10px;
    border-radius: 5px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-dim);
    cursor: pointer;
    font-family: var(--mono);
    transition: all 0.2s;
    letter-spacing: 0.05em;
  }

  .btn-xs:hover { border-color: var(--accent); color: var(--accent); }

  .autoscroll-toggle {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 10px;
    color: var(--text-dim);
    cursor: pointer;
    user-select: none;
  }

  .toggle {
    width: 28px; height: 14px;
    background: var(--border-bright);
    border-radius: 7px;
    position: relative;
    transition: background 0.2s;
  }

  .toggle.on { background: var(--accent3); }

  .toggle::after {
    content: '';
    position: absolute;
    top: 2px; left: 2px;
    width: 10px; height: 10px;
    background: white;
    border-radius: 50%;
    transition: transform 0.2s;
  }

  .toggle.on::after { transform: translateX(14px); }

  .filter-tabs {
    display: flex;
    gap: 3px;
  }

  .filter-tab {
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 9px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    cursor: pointer;
    border: 1px solid transparent;
    color: var(--text-dim);
    transition: all 0.2s;
    background: none;
    font-family: var(--mono);
  }

  .filter-tab:hover { color: var(--text); }
  .filter-tab.active { background: var(--surface3); border-color: var(--border-bright); color: var(--text); }

  /* EMPTY STATE */
  .empty-log {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    color: var(--text-muted);
    text-align: center;
    gap: 8px;
  }

  .empty-log .icon { font-size: 32px; opacity: 0.4; }
  .empty-log p { font-size: 11px; line-height: 1.6; }

  /* SCROLLBAR GLOBAL */
  * { scrollbar-width: thin; scrollbar-color: var(--border-bright) transparent; }

  /* RESPONSIVE */
  @media (max-width: 900px) {
    .main-grid { grid-template-columns: 1fr; }
    .connection-panel { grid-column: 1; grid-row: auto; }
    .emit-panel, .listeners-panel, .logs-panel { grid-column: 1; grid-row: auto; }
  }