:root {
      --primary-blue: #000000; /* #1f4fd8; */
      --light-blue: #f4f7ff;
      --text-dark: #1f2937;
      --text-light: #6b7280; /* #6b7280; */
      --white: #ffffff;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      font-family: "Segoe UI", Tahoma, sans-serif;
      scroll-behavior: smooth;
    }

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

    a {
      text-decoration: none;
      color: inherit;
    }

    /* ===== NAVBAR ===== */
    header {
      position: fixed;
      top: 0;
      width: 100%;
      background: var(--white);
      border-bottom: 1px solid #e5e7eb;
      z-index: 1000;
    }

    .nav-container {
      max-width: 1100px;
      margin: auto;
      padding: 1rem;
      display: flex;
      justify-content: space-between;
      align-items: center;

    }

    .logo {
      font-size: 1.4rem;
      font-weight: bold;
      color: var(--primary-blue);
    }

    nav ul {
      display: flex;
      gap: 1.5rem;
      list-style: none;
    }

    nav ul li a {
      color: var(--text-dark);
      font-weight: 500;
    }

    .hamburger {
      display: none;
      font-size: 1.8rem;
      cursor: pointer;
    }

    /* ===== SECTIONS ===== */
    section {
      padding: 5rem 1rem;
    }

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

    /* ===== HERO ===== */
    .hero {
      background: var(--light-blue);
      padding-top: 7rem;
      text-align: center;
    }

    .hero h1 {
      font-size: 2.5rem;
      margin-bottom: 1rem;
    }

    .hero p {
      color: var(--text-light);
      max-width: 600px;
      margin: auto;
      margin-bottom: 2rem;
    }

    .btn {
      background: var(--primary-blue);
      color: var(--white);
      padding: 0.75rem 1.5rem;
      border-radius: 6px;
      font-weight: 600;
      display: inline-block;
    }

    /* ===== ABOUT ===== */
    .about p {
      max-width: 800px;
      margin: auto;
      color: var(--text-light);
      text-align: center;
    }

    /* ===== SERVICES ===== */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
      margin-top: 3rem;
    }

    .service-card {
      background: var(--white);
      border: 1px solid #e5e7eb;
      padding: 2rem;
      border-radius: 8px;
      text-align: center;
    }

    .service-card h3 {
      margin-bottom: 1rem;
      color: var(--primary-blue);
    }

    .service-card p {
      color: var(--text-light);
    }

    /* ===== CONTACT ===== */
    .contact form {
      max-width: 600px;
      margin: auto;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    .contact input,
    .contact textarea {
      padding: 0.75rem;
      border-radius: 6px;
      border: 1px solid #d1d5db;
      font-size: 1rem;
    }

    .contact button {
      background: var(--primary-blue);
      color: var(--white);
      border: none;
      padding: 0.75rem;
      border-radius: 6px;
      font-size: 1rem;
      cursor: pointer;
    }

    /* ===== RESPONSIVE ===== */
    @media (max-width: 768px) {
      nav ul {
        position: absolute;
        top: 64px;
        right: 0;
        background: var(--white);
        width: 100%;
        flex-direction: column;
        display: none;
        border-top: 1px solid #e5e7eb;
      }

      nav ul.show {
        display: flex;
      }

      nav ul li {
        padding: 1rem;
        text-align: center;
      }

      .hamburger {
        display: block;
      }

      .services-grid {
        grid-template-columns: 1fr;
      }

      .hero h1 {
        font-size: 2rem;
      }
    }