*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    :root {
      --bg: #09090b;
      --surface: #18181b;
      --surface-hover: #27272a;
      --border: #27272a;
      --text: #f4f4f5;
      --text-dim: #a1a1aa;
      --accent: #10b981;
      --accent-bright: #34d399;
      --green: #10b981;
      --green-bright: #34d399;
      --red: #ef4444;
      --yellow: #f59e0b;
      --purple: #8b5cf6;
      --purple-bright: #a78bfa;
      --radius: 12px;
      --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      --mono: "SF Mono", "Fira Code", "Cascadia Code", monospace;
    }
    
    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(20px); }
      to { opacity: 1; transform: translateY(0); }
    }
    
    @keyframes pulse {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.5; }
    }
    
    @keyframes shimmer {
      0% { background-position: -1000px 0; }
      100% { background-position: 1000px 0; }
    }
    
    body {
      font-family: var(--font);
      background: linear-gradient(135deg, #09090b 0%, #18181b 50%, #09090b 100%);
      background-attachment: fixed;
      color: var(--text);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 20px;
      position: relative;
      overflow-x: hidden;
    }
    
    body::before {
      content: '';
      position: fixed;
      top: -50%;
      left: -50%;
      width: 200%;
      height: 200%;
      background: radial-gradient(circle at 20% 50%, rgba(16, 185, 129, 0.06) 0%, transparent 50%),
                  radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.04) 0%, transparent 50%),
                  radial-gradient(circle at 40% 20%, rgba(16, 185, 129, 0.03) 0%, transparent 50%);
      pointer-events: none;
      z-index: 0;
    }
    .container {
      max-width: 900px;
      width: 100%;
      text-align: center;
      position: relative;
      z-index: 1;
      animation: fadeInUp 0.8s ease-out;
    }
    
    .hero {
      margin-bottom: 56px;
    }
    
    .hero h1 {
      font-size: clamp(2.5rem, 6vw, 4.5rem);
      font-weight: 800;
      margin-bottom: 20px;
      background: linear-gradient(135deg, var(--accent-bright) 0%, var(--purple-bright) 50%, var(--green-bright) 100%);
      background-size: 200% auto;
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: -0.03em;
      line-height: 1.1;
      animation: shimmer 8s linear infinite;
    }
    
    .hero p {
      font-size: 1.25rem;
      color: var(--text-dim);
      margin-bottom: 40px;
      line-height: 1.7;
      max-width: 700px;
      margin-left: auto;
      margin-right: auto;
    }
    
    .version-badge {
      display: inline-block;
      padding: 6px 14px;
      background: rgba(16, 185, 129, 0.1);
      border: 1px solid rgba(16, 185, 129, 0.2);
      border-radius: 999px;
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--accent-bright);
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 24px;
    }
    .features {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 20px;
      margin-bottom: 40px;
    }
    .feature-card {
      background: linear-gradient(135deg, var(--surface) 0%, rgba(26, 31, 46, 0.8) 100%);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      position: relative;
      overflow: hidden;
    }
    
    .feature-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 2px;
      background: linear-gradient(90deg, var(--accent), var(--purple), var(--green));
      opacity: 0;
      transition: opacity 0.3s;
    }
    
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 60px rgba(16, 185, 129, 0.12), 0 0 0 1px rgba(16, 185, 129, 0.1);
      border-color: rgba(16, 185, 129, 0.3);
    }
    
    .feature-card:hover::before {
      opacity: 1;
    }
    .feature-card .icon {
      font-size: 2rem;
      margin-bottom: 16px;
    }
    .feature-card h3 {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .feature-card p {
      font-size: 0.9rem;
      color: var(--text-dim);
      line-height: 1.5;
    }
    .actions {
      display: flex;
      flex-direction: column;
      gap: 12px;
      align-items: center;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background: linear-gradient(135deg, var(--accent) 0%, var(--accent-bright) 100%);
      color: #fff;
      border: none;
      border-radius: var(--radius);
      padding: 14px 32px;
      font-size: 1rem;
      font-weight: 600;
      cursor: pointer;
      text-decoration: none;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
      position: relative;
      overflow: hidden;
    }
    
    .btn::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 100%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
      transition: left 0.5s;
    }
    
    .btn:hover::before {
      left: 100%;
    }
    
    .btn:hover {
      background: linear-gradient(135deg, var(--accent-bright) 0%, var(--purple) 100%);
      transform: translateY(-2px);
      box-shadow: 0 12px 32px rgba(16, 185, 129, 0.3), 0 0 0 1px rgba(16, 185, 129, 0.2);
    }
    
    .btn.secondary {
      background: var(--surface);
      color: var(--text);
      border: 1px solid var(--border);
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }
    
    .btn.secondary:hover {
      background: var(--surface-hover);
      border-color: var(--accent);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    }
    .status {
      margin-top: 40px;
      padding: 16px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      font-size: 0.9rem;
      color: var(--text-dim);
    }
    /* ── Command panel ─────────────────────────────────────────────── */
    .command-panel {
      margin-top: 40px;
      text-align: left;
    }
    .command-panel h2 {
      font-size: 1.5rem;
      font-weight: 700;
      margin-bottom: 16px;
      text-align: center;
    }
    .command-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 20px;
      margin-bottom: 12px;
    }
    .command-card h3 {
      font-size: 1.1rem;
      margin-bottom: 8px;
    }
    .command-card p {
      font-size: 0.9rem;
      color: var(--text-dim);
      margin-bottom: 12px;
    }
    .command-btn {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--accent);
      color: #fff;
      border: none;
      border-radius: var(--radius);
      padding: 8px 18px;
      font-size: 0.9rem;
      font-weight: 600;
      cursor: pointer;
      transition: background 0.2s;
    }
    .command-btn:hover {
      background: var(--accent-bright);
    }
    .command-btn:disabled {
      opacity: 0.6;
      cursor: not-allowed;
    }
    .command-loading {
      display: none;
      margin-top: 10px;
      font-size: 0.85rem;
      color: var(--yellow);
      animation: pulse 1.2s ease-in-out infinite;
    }
    .command-result {
      display: none;
      margin-top: 10px;
      font-size: 0.85rem;
      color: var(--green);
    }

    @media (max-width: 640px) {
      .features {
        grid-template-columns: 1fr;
      }
      .actions {
        flex-direction: column;
      }
    }