:root {
        --bg: #0b1020;
        --primary: #4f7cff;
        --secondary: #6c4dff;
        --text: #e8ecff;
        --muted: #a9b2d0;
        --card: #151d36;
        --border: #243056;
      }

      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: Arial, Helvetica, sans-serif;
      }

      body {
        background: var(--bg);
        color: var(--text);
        line-height: 1.6;
      }

      .container {
        width: 90%;
        max-width: 1100px;
        margin: auto;
      }

      /* Header */
      header {
        position: sticky;
        top: 0;
        background: rgba(11, 16, 32, 0.95);
        backdrop-filter: blur(8px);
        border-bottom: 1px solid var(--border);
        z-index: 10;
      }

      nav {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 18px 0;
      }

      .logo {
        font-size: 28px;
        font-weight: bold;
        letter-spacing: 1px;
      }

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

      nav ul {
        display: flex;
        gap: 25px;
        list-style: none;
      }

      nav a {
        color: white;
        text-decoration: none;
        font-weight: bold;
      }

      nav a:hover {
        color: var(--primary);
      }

      /* Hero */
      .hero {
        min-height: 90vh;
        display: flex;
        align-items: center;
      }

      .hero-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 50px;
        align-items: center;
      }

      .hero h1 {
        font-size: 58px;
        line-height: 1.1;
        margin-bottom: 20px;
      }

      .hero h1 span {
        color: var(--primary);
      }

      .hero p {
        color: var(--muted);
        font-size: 20px;
        margin-bottom: 30px;
      }

      .btn {
        background: linear-gradient(45deg, var(--primary), var(--secondary));
        padding: 15px 30px;
        border: none;
        border-radius: 12px;
        color: white;
        font-weight: bold;
        cursor: pointer;
        text-decoration: none;
        display: inline-block;
      }

      .mock-card {
        background: var(--card);
        padding: 30px;
        border-radius: 25px;
        border: 1px solid var(--border);
        box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
      }

      .code {
        color: #7fa8ff;
        font-family: monospace;
        margin-bottom: 12px;
      }

      /* Sections */
      section {
        padding: 90px 0;
      }

      .section-title {
        text-align: center;
        font-size: 40px;
        margin-bottom: 50px;
      }

      .cards {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
        gap: 25px;
      }

      .card {
        background: var(--card);
        padding: 30px;
        border-radius: 20px;
        border: 1px solid var(--border);
      }

      .card h3 {
        margin-bottom: 15px;
        color: var(--primary);
      }

      .about {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
      }

      .panel {
        background: var(--card);
        padding: 35px;
        border-radius: 20px;
      }

      /* Contact */
      form {
        max-width: 650px;
        margin: auto;
      }

      input,
      textarea {
        width: 100%;
        padding: 16px;
        margin-bottom: 15px;
        background: #10172d;
        border: 1px solid var(--border);
        border-radius: 12px;
        color: white;
      }

      textarea {
        min-height: 150px;
        resize: none;
      }

      button {
        width: 100%;
      }

      /* Footer */
      footer {
        text-align: center;
        padding: 30px;
        border-top: 1px solid var(--border);
        color: var(--muted);
      }

      /* Responsive */
      @media (max-width: 800px) {
        .hero-grid,
        .about {
          grid-template-columns: 1fr;
        }

        .hero h1 {
          font-size: 40px;
        }

        nav ul {
          display: none;
        }
      }