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

    body {
      font-family: Arial, sans-serif;
      background-color: #444;
    }

  header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 999;
    background-color: #333;
    padding: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgb(1, 247, 21);
  }


    .logo img {
      height: 50px;
    }

    .search-box {
      flex: 0 0 300px;
      position: relative;
    }

    .search-box input {
      width: 100%;
      padding: 8px 12px 8px 35px;
      border: 1px solid #ccc;
      border-radius: 20px;
      font-size: 16px;
    }

    .search-box .fa-search {
      position: absolute;
      top: 50%;
      left: 10px;
      transform: translateY(-50%);
      color: #888;
    }

    .auth-links {
      display: flex;
      gap: 10px;
    }

    .auth-links a {
      text-decoration: none;
      color: #fff;
      font-weight: 500;
      padding: 8px 16px;
      border: 1px solid #fff;
      border-radius: 20px;
      transition: background 0.2s;
    }

    .auth-links a:hover {
      background-color: #fff;
      color: blue;
    }

.banner-section {
  background-image: url('../image/360_F_463375173_vBKRkUbVoCuS9lpUmhdfCc13pprPr148.jpg'); /* Thay bằng ảnh của bạn */
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  height: 300px; /* Hoặc tuỳ chiều cao bạn muốn */
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  color: #fff;
  position: relative;
  margin-top: 90px;
}
@media (max-width: 768px) {
  .banner-section  {
    margin-top: 170px;
  }
}
/* Overlay tối (nếu muốn làm mờ nền ảnh) */
.banner-section::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.5); /* Màu tối phủ ảnh nền */
  z-index: 1;
}

.home-container {
  position: relative;
  z-index: 2; /* Đảm bảo chữ nằm trên lớp overlay */
}

.home-container h1 {
  font-size: 48px;
  margin-bottom: 10px;
  color: #00ff00; /* màu xanh hacker */
}

.home-container h4 {
  font-size: 30px;
  font-weight: 300;
  color: #00ff00; /* đồng bộ màu hacker */
}
.menu-toggle-section {
  position: relative;
  padding: 20px;
}

#menuToggle {
    background-color: #00ff00;
    color: rgb(7, 0, 0);
    border: none;
    padding: 12px 20px;
    font-size: 20px;
    border-radius: 8px;
    cursor: pointer;
    box-shadow: 0 4px 6px rgba(0,0,0,0.2);
    transition: background-color 0.3s, transform 0.2s;
    font-weight: bold;
}

#menuToggle:hover {
    background-color: #2980b9;
    transform: scale(1.05);
}

#menuToggle i {
    margin-right: 8px;
}


.menu-popup {
  position: absolute;
  top: 70px;
  left: 20px;
  background-color: #222;
  border: 1px solid #444;
  border-radius: 5px;
  padding: 10px 0;
  display: none;
  flex-direction: column;
  min-width: 150px;
  z-index: 100;
}

.menu-popup a {
  color: #00ff00;
  padding: 10px 20px;
  text-decoration: none;
  display: block;
  font-size: 20px;
}
@media (max-width: 768px) {
  .menu-popup a {
    font-size: 16px;
  }
}
.menu-popup a:hover {
  background-color: #333;
}
.auth-section {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #000;
    padding: 50px 0;
    color: #00ff00;
    font-family: 'Courier New', monospace;
    min-height: 80vh;
}
.auth-section form {
    background-color: #111;
    border: 1px solid #00ff00;
    padding: 30px 40px;
    border-radius: 10px;
    box-shadow: 0 0 20px #00ff00;
    width: 100%;
    max-width: 400px;
}

.auth-section h2 {
    text-align: center;
    margin-bottom: 20px;
    text-shadow: 0 0 5px #00ff00;
}

.auth-section input[type="text"],
.auth-section input[type="password"] {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #00ff00;
    border-radius: 5px;
    background-color: #000;
    color: #00ff00;
}

.auth-section input::placeholder {
    color: #39ff14;
    opacity: 0.6;
}

.auth-section button {
    width: 100%;
    padding: 10px;
    background-color: #00ff00;
    border: none;
    color: #000;
    font-weight: bold;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.2s ease;
}

.auth-section button:hover {
    background-color: #39ff14;
}
.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #00ff00;
    font-weight: bold;
}

.user-info i {
    font-size: 20px;
}

.logout-btn {
    margin-left: 10px;
    color: red;
    text-decoration: none;
}
.logout-btn:hover {
    text-decoration: underline;
}
@media (max-width: 768px) {
  header {
    flex-direction: column;
    align-items: flex-start;
    padding: 10px 15px;
  }

  .logo img {
    height: 40px;
    margin-bottom: 10px;
  }

  .search-box {
    width: 100%;
    margin-bottom: 10px;
    flex: 1;
  }

  .auth-links {
    width: 100%;
    justify-content: space-between;
    flex-wrap: wrap;
  }

  .auth-links a {
    flex: 1 1 48%;
    text-align: center;
    margin: 5px 0;
  }

  .menu-toggle-section {
    padding: 10px;
  }

  .banner-section {
    height: 200px;
  }

  .home-container h1 {
    font-size: 30px;
  }

  .home-container h4 {
    font-size: 18px;
  }

  .auth-section {
    padding: 30px 15px;
  }

  .auth-section form {
    padding: 20px;
  }
}
.site-footer {
  background: #2c3e50;
  color: #ecf0f1;
  padding: 30px 20px 10px;
  font-family: Arial, sans-serif;
  font-size: 14px;
}

.footer-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 30px;
  max-width: 1200px;
  margin: auto;
}

.footer-column {
  flex: 1;
  min-width: 220px;
}

.footer-column h4 {
  margin-bottom: 15px;
  color: #1abc9c;
  font-size: 16px;
}

.footer-column p,
.footer-column li {
  margin-bottom: 10px;
}

.footer-column ul {
  list-style: none;
  padding: 0;
}

.footer-column a {
  color: #ecf0f1;
  text-decoration: none;
  transition: color 0.3s;
}

.footer-column a:hover {
  color: #1abc9c;
}

.footer-social a {
  display: inline-block;
  margin-right: 10px;
  font-size: 18px;
  color: #ecf0f1;
  transition: color 0.3s;
}

.footer-social a:hover {
  color: #1abc9c;
}

.footer-bottom {
  text-align: center;
  border-top: 1px solid #444;
  padding-top: 10px;
  margin-top: 20px;
  font-size: 13px;
  color: #bbb;
}