:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: #1a2235;
    --bg-card-hover: #1f2a40;
    --accent: #00d4ff;
    --accent-glow: rgba(0, 212, 255, 0.3);
    --accent-secondary: #7c3aed;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #1e293b;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
    --gradient-3: linear-gradient(135deg, #0a0e1a 0%, #1a2235 100%);
  }

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

  body {
    font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
  }

  body::before {
    content: '';
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: 
      radial-gradient(ellipse 80% 50% at 20% 20%, rgba(0, 212, 255, 0.08) 0%, transparent 50%),
      radial-gradient(ellipse 60% 40% at 80% 80%, rgba(124, 58, 237, 0.08) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
  }

  .container {
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: 30px 40px;
  }

  .header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 40px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
  }

  .logo-section {
    display: flex;
    align-items: center;
    gap: 16px;
  }

  .logo-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-2);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    box-shadow: 0 8px 32px var(--accent-glow);
  }

  .logo-text h1 {
    font-size: 26px;
    font-weight: 700;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .logo-text p {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
  }

  .status-badges {
    display: flex;
    gap: 12px;
  }

  .badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 13px;
    transition: all 0.3s;
  }

  .badge .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    animation: pulse 2s infinite;
  }

  .badge.connected .dot { background: var(--success); }
  .badge.disconnected .dot { background: var(--danger); animation: none; }
  .badge.warning .dot { background: var(--warning); }

  @keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
  }

  .main-grid {
    display: grid;
    grid-template-columns: 420px 1fr;
    gap: 24px;
  }

  .left-panel {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  .card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 24px;
    transition: all 0.3s;
  }

  .card:hover {
    border-color: rgba(0, 212, 255, 0.2);
    box-shadow: 0 0 40px rgba(0, 212, 255, 0.05);
  }

  .card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
  }

  .card-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    font-weight: 600;
  }

  .card-title .icon {
    width: 36px;
    height: 36px;
    background: var(--gradient-2);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
  }

  .connection-card .form-group {
    margin-bottom: 16px;
  }

  .form-group label {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }

  .input-group {
    display: flex;
    gap: 8px;
  }

  input[type="text"] {
    flex: 1;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 16px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: all 0.3s;
  }

  input[type="text"]:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
  }

  .btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
  }

  .btn-primary {
    background: var(--gradient-2);
    color: white;
    box-shadow: 0 4px 20px var(--accent-glow);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
  }

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

  .btn-secondary:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
  }

  .btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
  }

  .btn-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
  }

  .btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
  }

  .upload-zone {
    border: 2px dashed var(--border);
    border-radius: 16px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
  }

  .upload-zone::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.05) 0%, rgba(124, 58, 237, 0.05) 100%);
    opacity: 0;
    transition: opacity 0.3s;
  }

  .upload-zone:hover::before,
  .upload-zone.dragover::before {
    opacity: 1;
  }

  .upload-zone:hover {
    border-color: var(--accent);
  }

  .upload-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background: var(--bg-secondary);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
  }

  .upload-zone h3 {
    font-size: 16px;
    margin-bottom: 8px;
  }

  .upload-zone p {
    font-size: 13px;
    color: var(--text-muted);
  }

  .file-input {
    display: none;
  }

  .file-info {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 16px;
    display: none;
  }

  .file-info.visible {
    display: block;
  }

  .file-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
  }

  .file-name {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 500;
  }

  .file-name .icon {
    font-size: 20px;
  }

  .file-size {
    font-size: 12px;
    color: var(--text-muted);
  }

  .file-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .meta-item {
    background: var(--bg-card);
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 12px;
  }

  .meta-item span {
    color: var(--text-muted);
  }

  .progress-section {
    margin-top: 20px;
    display: none;
  }

  .progress-section.visible {
    display: block;
  }

  .progress-bar-container {
    background: var(--bg-secondary);
    border-radius: 10px;
    height: 12px;
    overflow: hidden;
    margin-bottom: 12px;
  }

  .progress-bar {
    height: 100%;
    background: var(--gradient-2);
    border-radius: 10px;
    width: 0%;
    transition: width 0.3s ease;
    position: relative;
  }

  .progress-bar::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.2) 50%, transparent 100%);
    animation: shimmer 2s infinite;
  }

  @keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
  }

  .progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-muted);
  }

  .action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 20px;
  }

  .right-panel {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  .status-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
  }

  .status-item {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 16px;
    text-align: center;
  }

  .status-item .value {
    font-size: 24px;
    font-weight: 700;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .status-item .label {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 4px;
    text-transform: uppercase;
  }

  .log-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 500px;
  }

  .log-panel .card-body {
    flex: 1;
    display: flex;
    flex-direction: column;
  }

  .log-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
  }

  .log-filters {
    display: flex;
    gap: 8px;
  }

  .filter-btn {
    padding: 6px 12px;
    border-radius: 20px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.3s;
  }

  .filter-btn:hover,
  .filter-btn.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
  }

  .log-content {
    flex: 1;
    background: var(--bg-secondary);
    border-radius: 12px;
    margin: 16px;
    padding: 16px;
    overflow-y: auto;
    max-height: 400px;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 12px;
    line-height: 1.6;
  }

  .log-content::-webkit-scrollbar {
    width: 6px;
  }

  .log-content::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 3px;
  }

  .log-content::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
  }

  .log-entry {
    padding: 4px 0;
    border-bottom: 1px solid rgba(255,255,255,0.03);
    display: flex;
    gap: 8px;
  }

  .log-time { color: var(--text-muted); }
  .log-level {
    font-weight: 600;
    min-width: 24px;
  }
  .log-level.E { color: var(--danger); }
  .log-level.W { color: var(--warning); }
  .log-level.I { color: var(--accent); }
  .log-level.D { color: var(--text-muted); }
  .log-tag { color: var(--accent-secondary); }
  .log-msg { color: var(--text-primary); }

  .log-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
  }

  .log-stats {
    font-size: 12px;
    color: var(--text-muted);
  }

  .stage-indicator {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
  }

  .stage {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    position: relative;
    flex: 1;
  }

  .stage:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 20px;
    left: calc(50% + 24px);
    width: calc(100% - 48px);
    height: 2px;
    background: var(--border);
  }

  .stage.active:not(:last-child)::after,
  .stage.completed:not(:last-child)::after {
    background: var(--accent);
  }

  .stage-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: all 0.3s;
    position: relative;
    z-index: 1;
  }

  .stage.active .stage-icon {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
    box-shadow: 0 0 20px var(--accent-glow);
  }

  .stage.completed .stage-icon {
    background: var(--success);
    border-color: var(--success);
    color: white;
  }

  .stage-label {
    font-size: 11px;
    color: var(--text-muted);
    text-align: center;
  }

  .stage.active .stage-label,
  .stage.completed .stage-label {
    color: var(--text-primary);
  }

  .toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s;
    z-index: 1000;
  }

  .toast.show {
    transform: translateY(0);
    opacity: 1;
  }

  .toast.success { border-left: 4px solid var(--success); }
  .toast.error { border-left: 4px solid var(--danger); }
  .toast.warning { border-left: 4px solid var(--warning); }

  .toast-icon {
    font-size: 24px;
  }

  .toast-message {
    font-size: 14px;
  }

  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .card {
    animation: fadeIn 0.5s ease forwards;
  }

  .left-panel .card:nth-child(1) { animation-delay: 0.1s; }
  .left-panel .card:nth-child(2) { animation-delay: 0.2s; }
  .left-panel .card:nth-child(3) { animation-delay: 0.3s; }

  .right-panel .card:nth-child(1) { animation-delay: 0.15s; }
  .right-panel .card:nth-child(2) { animation-delay: 0.25s; }