body {
  margin: 0;
  padding: 0;
  font-family: 'Poppins', sans-serif;
  background: url('images/12.png') no-repeat center center fixed;
  background-size: cover;
  color: white;
}

header.center-header {
  background-color: #153535;
  padding: 10px 0;
  display: flex;
  justify-content: center;
}

.navbar-content {
  display: flex;
  align-items: center;
  gap: 20px;
}

.logo {
  width: 32px;
  height: 32px;
  border-radius: 50%;
}

.brand {
  font-weight: bold;
  font-size: 1.2em;
}

.nav-links a {
  color: white;
  text-decoration: none;
  margin: 0 10px;
}

.nav-links a:hover {
  text-decoration: underline;
}

.main-content {
  display: flex;
  justify-content: center;
  align-items: center;
  height: calc(100vh - 60px);
}

.social-card {
  background-color: rgba(0, 0, 0, 0.7);
  padding: 40px;
  border-radius: 12px;
  text-align: center;
  width: 270px;
  box-shadow: 0 0 30px rgba(0, 0, 0, 0.7);
}

.social-link {
  display: block;
  background-color: #153535;
  color: white;
  text-decoration: none;
  padding: 14px;
  margin: 10px 0;
  border-radius: 6px;
  font-size: 1em;
  transition: background-color 0.3s ease;
}

.social-link:hover {
  background-color: #070404;
}

.social-link i {
  margin-right: 8px;
}

.about-card-flex {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(0,0,0,0.75);
  padding: 25px;
  border-radius: 16px;
  margin: 80px auto;
  max-width: 900px;
  gap: 30px;
  box-shadow: 0 0 20px rgba(0, 255, 170, 0.15);
}

.about-avatar {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid #00ccff;
  box-shadow: 0 0 15px #00ccff;
}

.about-text h2 {
  font-size: 2em;
  margin-bottom: 15px;
  color: #00ccff;
}

.about-text p {
  color: #f0f0f0;
  font-size: 1.1em;
  line-height: 1.6;
}

.contact-card {
  background-color: rgba(0, 0, 0, 0.75);
  padding: 30px;
  border-radius: 16px;
  text-align: center;
  max-width: 500px;
  margin: 100px auto;
  box-shadow: 0 0 25px rgba(0, 255, 170, 0.15);
  color: #f5f5f5;
}

.contact-card h2 {
  font-size: 2em;
  margin-bottom: 10px;
  color: #00ccff;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px;
  margin: 12px 0;
  border: none;
  border-radius: 8px;
  background: #1a1a1a;
  color: #fff;
  font-size: 1em;
}

.contact-form button {
  background-color: #00ccff;
  color: #000;
  padding: 12px 24px;
  border: none;
  font-weight: bold;
  border-radius: 8px;
  cursor: pointer;
  transition: 0.3s ease;
}

.contact-form button:hover {
  background-color: #00ffaa;
}

/* Responsive styles for mobile devices */
@media (max-width: 600px) {
  body {
    font-size: 15px;
    background-size: cover;
    background-attachment: fixed;
  }

  header.center-header {
    flex-direction: column;
    padding: 8px 0;
  }

  .navbar-content {
    flex-direction: column;
    gap: 10px;
  }

  .logo {
    width: 48px;
    height: 48px;
  }

  .brand {
    font-size: 1.1em;
  }

  .nav-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }

  .main-content {
    height: auto;
    min-height: 100vh;
    padding: 20px 0;
  }

  .social-card {
    width: 95vw;
    min-width: 0;
    padding: 20px 5vw;
    font-size: 1em;
  }

  .about-card-flex {
    flex-direction: column;
    gap: 18px;
    padding: 18px 5vw;
    margin: 40px auto;
    max-width: 98vw;
  }

  .about-avatar {
    width: 100px;
    height: 100px;
  }

  .about-text h2 {
    font-size: 1.3em;
  }

  .about-text p {
    font-size: 1em;
  }

  .contact-card {
    max-width: 98vw;
    padding: 18px 5vw;
    margin: 40px auto;
  }

  .contact-card h2 {
    font-size: 1.3em;
  }

  .contact-form input,
  .contact-form textarea {
    font-size: 1em;
    padding: 10px;
  }

  .contact-form button {
    padding: 10px 18px;
    font-size: 1em;
  }
}