* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;

  body {
    background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
    color: #fff;
    min-height: 100vh;
    padding-bottom: 40px;
  }

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

  header {
    text-align: center;
    padding: 30px 20px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 15px;
    margin-bottom: 25px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
  }

  h1 {
    font-size: 2.2rem;
    margin-bottom: 15px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    line-height: 1.3;
  }

  .notice {
    background: rgba(255, 255, 255, 0.1);
    padding: 12px;
    border-radius: 10px;
    font-size: 0.95rem;
    max-width: 600px;
    margin: 0 auto;
    border-left: 4px solid #ffcc00;
  }

  .projects-section {
    margin-top: 35px;
  }

  .section-title {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 12px;
  }

  .section-title::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, #ffcc00, #ff9900);
    border-radius: 2px;
  }

  .students-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 20px;
  }

  .student-card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
  }

  .student-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.3);
    background: rgba(255, 255, 255, 0.15);
  }

  .student-image {
    height: 180px;
    overflow: hidden;
    background: linear-gradient(45deg, #36d1dc, #5b86e5);
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .student-image i {
    font-size: 70px;
    color: white;
    opacity: 0.8;
  }

  .student-info {
    padding: 18px;
    text-align: center;
  }

  .student-name {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: #ffcc00;
  }

  .student-project {
    font-size: 0.95rem;
    opacity: 0.8;
    margin-bottom: 12px;
    line-height: 1.4;
  }

  .visit-btn {
    display: inline-block;
    padding: 8px 18px;
    background: linear-gradient(to right, #ffcc00, #ff9900);
    color: #333;
    text-decoration: none;
    border-radius: 25px;
    font-weight: bold;
    transition: all 0.3s ease;
    font-size: 0.9rem;
  }

  .visit-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(255, 204, 0, 0.4);
  }

  footer {
    text-align: center;
    margin-top: 50px;
    padding: 20px;
    font-size: 0.85rem;
    opacity: 0.7;
  }

  /* Mobil için medya sorguları */
  @media (max-width: 768px) {
    h1 {
      font-size: 1.6rem;
    }

    .notice {
      font-size: 0.9rem;
      padding: 10px;
    }

    .students-grid {
      grid-template-columns: 1fr;
      gap: 18px;
    }

    .section-title {
      font-size: 1.5rem;
    }

    .student-image {
      height: 160px;
    }

    .student-image i {
      font-size: 60px;
    }

    header {
      padding: 20px 15px;
    }
  }

  @media (max-width: 480px) {
    h1 {
      font-size: 1.4rem;
    }

    .container {
      padding: 15px;
    }

    .student-info {
      padding: 15px;
    }

    .student-name {
      font-size: 1.2rem;
    }

    .section-title {
      font-size: 1.3rem;
    }

    .visit-btn {
      padding: 7px 15px;
      font-size: 0.85rem;
    }
  }

  /* Navigasyon için mobil menü */
  .mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    position: absolute;
    top: 20px;
    right: 20px;
  }

  @media (max-width: 768px) {
    .mobile-menu-btn {
      display: block;
    }
  }

  .telno {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 1000;
    background: #25d366;
    color: #fff;
    border-radius: 50%;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    text-decoration: none;
    transition: background 0.2s;
  }
  .telno a {
    color: #fff;
    font-size: 2em;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
  }
  .telno:hover {
    background: #128c7e;
  }
  @media (max-width: 600px) {
    .telno {
      right: 12px;
      bottom: 12px;
      width: 48px;
      height: 48px;
    }
    .telno a {
      font-size: 1.5em;
    }
  }
}