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

    body {
      font-family: 'Segoe UI', sans-serif;
    }

    /* Genel Header */
    .header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid #e5e7eb;
      box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
      transition: all 0.3s ease;
    }

    .nav {
      max-width: 1400px;
      margin: 0 auto;
      padding: 0 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 80px;
    }

    .logo {
      text-decoration: none;
      font-size: 2rem;
      font-weight: 800;
      color: #1e40af;
      letter-spacing: -0.02em;
      transition: all 0.3s ease;
    }

    .logo:hover {
      color: #1d4ed8;
      transform: scale(1.05);
    }

    .nav-menu {
      display: flex;
      list-style: none;
      align-items: center;
      gap: 8px;
      margin: 0;
    }

    .nav-link {
      text-decoration: none;
      color: #4b5563;
      font-weight: 500;
      font-size: 15px;
      padding: 12px 16px;
      border-radius: 8px;
      transition: all 0.3s ease;
      position: relative;
    }

    .nav-link:hover {
      color: #1e40af;
      background: rgba(30, 64, 175, 0.06);
    }

    .nav-link.active {
      color: #1e40af;
      background: rgba(30, 64, 175, 0.1);
      font-weight: 600;
    }

    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 3px;
      left: 50%;
      transform: translateX(-50%);
      width: 20px;
      height: 3px;
      background: #1e40af;
      border-radius: 2px;
    }

    .nav-actions-desktop {
      display: flex;
      gap: 12px;
      align-items: center;
    }

    .nav-actions-mobile {
      display: none;
    }

    .btn {
      padding: 12px 24px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: 600;
      font-size: 14px;
      text-align: center;
      transition: all 0.3s ease;
      border: 2px solid #1e40af;
      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-outline {
      background: transparent;
      color: #1e40af;
    }

    .btn-outline:hover {
      background: #1e40af;
      color: white;
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(30, 64, 175, 0.3);
    }

    .btn-primary {
      background: #1e40af;
      color: white;
    }

    .btn-primary:hover {
      background: #1d4ed8;
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(30, 64, 175, 0.4);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      cursor: pointer;
      padding: 8px;
      border: none;
      background: none;
      gap: 5px;
      border-radius: 6px;
      transition: background 0.3s ease;
    }

    .hamburger:hover {
      background: rgba(30, 64, 175, 0.1);
    }

    .hamburger span {
      width: 26px;
      height: 3px;
      background: #374151;
      border-radius: 2px;
      transition: all 0.3s ease;
    }

    .hamburger.active span:nth-child(1) {
      transform: rotate(45deg) translate(7px, 7px);
      background: #1e40af;
    }

    .hamburger.active span:nth-child(2) {
      opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
      transform: rotate(-45deg) translate(7px, -7px);
      background: #1e40af;
    }

    /* Mobil / Tablet */
    @media (max-width: 1024px) {
      .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: #fff;
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding: 30px 0;
        transition: left 0.4s ease;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        z-index: 999;
      }

      .nav-menu.active {
        left: 0;
      }

      .nav-link {
        width: 100%;
        max-width: 320px;
        text-align: center;
        font-size: 16px;
        padding: 14px;
      }

      .nav-actions-mobile {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 16px;
        margin-top: 30px;
        width: 100%;
      }

      .nav-actions-mobile .btn {
        width: 90%;
        max-width: 320px;
        padding: 14px;
        font-size: 15px;
      }

      .hamburger {
        display: flex;
      }

      .nav-actions-desktop {
        display: none;
      }
    }

    @media (max-width: 768px) {
      .nav {
        padding: 0 16px;
        height: 70px;
      }

      .logo {
        font-size: 1.75rem;
      }

      .nav-link {
        font-size: 15px;
        padding: 12px;
      }

      .hamburger span {
        width: 22px;
        height: 2.5px;
      }

      .btn {
        font-size: 13px;
        padding: 10px 20px;
      }
    }

    @media (max-width: 480px) {
      .logo {
        font-size: 1.4rem;
      }

      .btn {
        font-size: 12px;
        padding: 8px 16px;
      }
    }

    /* Scroll efekti */
    .header.scrolled {
      background: rgba(255, 255, 255, 0.98);
      box-shadow: 0 4px 30px rgba(0, 0, 0, 0.12);
    }