body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: url('../img/TuyenSinh/bg_dangki.webp');
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
  background-color: rgba(0,0,0,0.6);
  background-blend-mode: darken;
}

.container {
  max-width: 1000px;
  margin: auto;
  padding: 40px;
  background-color: rgba(255, 255, 255, 0.85);
  border-radius: 10px;
  margin-top: 60px;
}

h1 {
  color: #b80000;
  text-align: center;
  font-weight: bold;
}

.subtitle {
  text-align: center;
  font-size: 20px;
  margin-bottom: 30px;
}

.form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.gender {
  grid-column: span 1;
  display: flex;
  align-items: center;
  gap: 15px;
}
.gender input{
  margin-left: 20px;
}
.email {
  grid-column: span 1;
}

input[type="text"],
input[type="email"] {
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 5px;
}

.form-buttons {
  grid-column: span 2;
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-top: 20px;
  position: relative;
  right: 35px;
}

.btn {
  padding: 15px 25px;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
}

.primary {
  background-color: #c51212;
  color: white;
}

.secondary {
  background-color: #a70000;
  color: white;
}

@media(max-width: 600px) {
  h1 {
    font-size: 28px;
  }

  .grid-item {
    height: 220px;
  }

  .overlay-text {
    font-size: 14px;
  }
}