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

    :root {
      --primary: #4f46e5;
      --primary-dark: #4338ca;
      --secondary: #10b981;
      --dark: #1e293b;
      --light: #f8fafc;
      --gray: #64748b;
      --light-gray: #e2e8f0;
    }

    body {
      font-family: 'Inter', sans-serif;
      line-height: 1.6;
      color: var(--dark);
      background-color: #ffffff;
      overflow-x: hidden;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      z-index: 1000;
      padding: 1rem 0;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
      transition: all 0.3s ease;
    }

    .header-scrolled {
      padding: 0.5rem 0;
      background: rgba(255, 255, 255, 0.98);
    }

    nav {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .logo {
      font-size: 1.5rem;
      font-weight: 700;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      background-clip: text;
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      text-decoration: none;
    }

    .nav-links {
      display: flex;
      gap: 2rem;
    }

    .nav-links a {
      text-decoration: none;
      color: var(--dark);
      font-weight: 500;
      position: relative;
      transition: color 0.3s ease;
    }

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

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -5px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.3s ease;
    }

    .nav-links a:hover::after {
      width: 100%;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--dark);
    }

    #hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      padding-top: 80px;
      position: relative;
      overflow: hidden;
      background-image: url(./image/bg.png);
      background-position: center;
      background-repeat: no-repeat;
      background-size: cover;
    }

    .hero-content {
      max-width: 650px;
      opacity: 0;
      transform: translateY(30px);
      animation: fadeInUp 1s ease forwards;
    }

    .hero-content h1 {
      font-size: 3.5rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 1rem;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      background-clip: text;
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-content p {
      font-size: 1.25rem;
      color: var(--gray);
      margin-bottom: 2rem;
    }

    .hero-btn {
      display: inline-block;
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      color: white;
      padding: 12px 32px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: 600;
      font-size: 1.1rem;
      transition: all 0.3s ease;
      box-shadow: 0 4px 20px rgba(79, 70, 229, 0.3);
    }

    .hero-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 25px rgba(79, 70, 229, 0.4);
    }

    section {
      padding: 100px 0;
    }

    .section-title {
      text-align: center;
      font-size: 2.5rem;
      font-weight: 700;
      margin-bottom: 3rem;
      position: relative;
    }

    .section-title::after {
      content: '';
      position: absolute;
      bottom: -10px;
      left: 50%;
      transform: translateX(-50%);
      width: 80px;
      height: 4px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      border-radius: 2px;
    }

    .about-content {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 4rem;
      align-items: center;
    }

    .about-text h3 {
      font-size: 2rem;
      margin-bottom: 1.5rem;
      color: var(--dark);
    }

    .about-text p {
      margin-bottom: 1rem;
      color: var(--gray);
    }

    .about-photo {
      max-height: 500px;
    }

    .skills {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
      margin-top: 2rem;
      cursor: pointer;
    }

    .skill {
      background: white;
      padding: 8px 16px;
      border-radius: 20px;
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--primary);
      border: 2px solid var(--light-gray);
      transition: all 0.3s ease;
    }

    .skill:hover {
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 2rem;
    }

    .service-card {
      background: white;
      padding: 2.5rem 2rem;
      border-radius: 20px;
      text-align: center;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
      transition: all 0.3s ease;
      opacity: 0;
      transform: translateY(20px);
    }

    .service-card.visible {
      opacity: 1;
      transform: translateY(0);
    }

    .service-card:hover {
      transform: translateY(-10px);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
    }

    .service-icon {
      width: 60px;
      height: 60px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 1.5rem;
      color: white;
      font-size: 1.5rem;
    }

    .service-card h3 {
      font-size: 1.5rem;
      margin-bottom: 1rem;
      color: var(--dark);
    }

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

    #portfolio {
      background: var(--light);
    }

    .portfolio-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
      gap: 2rem;
    }

    .portfolio-item {
      background: white;
      border-radius: 20px;
      overflow: hidden;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
      transition: all 0.3s ease;
      opacity: 0;
      transform: scale(0.95);
    }

    .portfolio-item.visible {
      opacity: 1;
      transform: scale(1);
    }

    .portfolio-item:hover {
      transform: translateY(-10px);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    }

    .portfolio-img {
      width: 100%;
      height: 200px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 1.2rem;
      font-weight: 600;
    }

    .portfolio-info {
      padding: 1.5rem;
    }

    .portfolio-info h3 {
      font-size: 1.3rem;
      margin-bottom: 0.5rem;
      color: var(--dark);
    }

    .portfolio-info p {
      color: var(--gray);
      font-size: 0.95rem;
    }

    .contact-content {
      text-align: center;
      max-width: 600px;
      margin: 0 auto;
    }

    .contact-content p {
      color: var(--gray);
      margin-bottom: 2rem;
      font-size: 1.1rem;
    }

    .social-links {
      display: flex;
      justify-content: center;
      gap: 1.5rem;
      margin-top: 2rem;
    }

    .social-link {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--light);
      display: flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
      color: var(--primary);
      font-size: 1.2rem;
      transition: all 0.3s ease;
    }

    .social-link:hover {
      transform: translateY(-3px);
    }

    footer {
      background: var(--dark);
      color: white;
      padding: 2rem 0;
      text-align: center;
    }

    footer p {
      color: #94a3b8;
    }

    @keyframes fadeInUp {
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    @media (max-width: 768px) {
            .mobile-menu-btn {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        width: 30px;
        height: 21px;
        background: transparent;
        border: none;
        cursor: pointer;
        padding: 0;
        z-index: 1001;
      }

      .mobile-menu-btn span {
        width: 100%;
        height: 3px;
        background-color: #333;
        border-radius: 2px;
        transition: transform 0.3s ease, opacity 0.3s ease, background-color 0.3s ease;
      }

      .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        align-items: center;
        padding: 1rem 0;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        display: none;
      }

      .nav-links.active {
        display: flex;
      }
      .hero-content h1 {
        font-size: 2.5rem;
      }

      .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
      }
      .about-stats {
        margin: 0 auto;
      }

          .about-photo {
      max-height: 250px;
    }


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

    @media (max-width: 480px) {
      .hero-content h1 {
        font-size: 2rem;
      }

      .about-text h3 {
        font-size: 1.5rem;
      }

      .about-stats {
            display: none;
      }

      section {
        padding: 60px 0;
      }
    }

    a {
      text-decoration: none;
    }

    .mobile-menu-btn.active span:nth-child(1) {
      transform: rotate(45deg) translate(6px, 6px);
    }

    .mobile-menu-btn.active span:nth-child(2) {
      opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
      transform: rotate(-45deg) translate(6px, -6px);
    }