:root {
      --bg-color: #ffffff;
      --text-color: #333333;
      --secondary-text: #555555;
      --accent-color: #0077ff;
      --accent-hover: #0056cc;
      --card-bg: #f9f9f9;
      --border: #e5e5e5;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: "Segoe UI", sans-serif;
      background: var(--bg-color);
      color: var(--text-color);
      line-height: 1.6;
    }
    /* Navbar */
    .nav_container {
      position: fixed;
      top: 0;
      width: 100%;
      background: rgba(255,255,255,0.9);
      border-bottom: 1px solid var(--border);
      backdrop-filter: blur(6px);
      z-index: 1000;
    }
    nav {
      display: flex;
      justify-content: center;
      gap: 25px;
      padding: 15px 0;
      background: #0056cc;
    }
    nav a {
      text-decoration: none;
      color: white;
      font-weight: 500;
      transition: 0.3s;
    }
    nav a:hover {
      color: var(--accent-color);
    }
    /* Sections */
    section {
      padding: 100px 20px 60px;
      max-width: 1100px;
      margin: auto;
    }
    .section_title {
      text-align: center;
      font-size: 2.3rem;
      margin-bottom: 40px;
      color: var(--accent-color);
    }
    /* Home */
    .main_container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 30px;
    }
    .main_text h1 {
      font-size: 2.5rem;
      margin-bottom: 10px;
    }
    .main_text p {
      font-size: 1rem;
      color: var(--secondary-text);
    }
    .main_img {
      width: 220px;
      border-radius: 50%;
      border: 5px solid var(--accent-color);
    }
    /* About */
    .about_container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      background: var(--card-bg);
      padding: 30px;
      border-radius: 12px;
      border: 1px solid var(--border);
    }
    .about_title {
      font-size: 1.5rem;
      margin-bottom: 10px;
    }
    .info_items {
      display: flex;
      flex-direction: column;
      gap: 15px;
      margin: 20px 0;
    }
    .info_item {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .info_icon {
      font-size: 1.6rem;
      color: var(--accent-color);
    }
    .btn_contact {
      display: inline-block;
      padding: 10px 20px;
      background: var(--accent-color);
      color: #fff;
      border-radius: 30px;
      text-decoration: none;
      transition: 0.3s;
    }
    .btn_contact:hover {
      background: var(--accent-hover);
    }
    /* Experience */
    .experience_cards {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
    }
    .experience_card {
      background: var(--card-bg);
      padding: 20px;
      border-radius: 12px;
      border: 1px solid var(--border);
      transition: 0.3s;
    }
    .experience_card:hover {
      box-shadow: 0 4px 12px rgba(0,0,0,0.08);
      transform: translateY(-5px);
    }
    /* Contact */
    .contact_container {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
    }
    .contact_card {
      background: var(--card-bg);
      padding: 20px;
      border-radius: 12px;
      border: 1px solid var(--border);
      display: flex;
      align-items: center;
      gap: 15px;
    }
    .contact_card i {
      font-size: 1.8rem;
      color: var(--accent-color);
    }
    .info_title {
      font-size: 1.2rem;
      margin-bottom: 3px;
    }
    .info_subtitle {
      color: var(--secondary-text);
      font-size: 0.95rem;
    }
    /* Responsive */
    @media (max-width: 768px) {
      .about_container {
        grid-template-columns: 1fr;
      }
      .main_container {
        flex-direction: column;
        text-align: center;
      }
    }