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

body {
  font-family: 'Segoe UI', sans-serif;
  line-height: 1.6;
  background-color: #f5f7fa;
  color: #333;
}

/* Navbar utama */
header {
  background: linear-gradient(135deg, #0e83cd, #2a9fd6);
  padding: 40px 20px 100px;
  color: white;
  text-align: center;
  position: relative;
}

header h1 {
  font-size: 36px;
  margin-bottom: 10px;
}

header p {
  font-size: 18px;
}

/* Efek lengkung transisi dari header ke main */
header::after {
  content: "";
  position: absolute;
  bottom: -40px;
  left: 0;
  width: 100%;
  height: 80px;
  background: #f5f7fa;
  border-radius: 50% 50% 0 0;
}

/* Navigasi kedua di bawah header */
nav {
  background-color: #ffffff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  padding: 15px 20px;
  text-align: center;
  position: sticky;
  top: 0;
  z-index: 999;
}

nav a {
  margin: 0 15px;
  text-decoration: none;
  color: #007BFF;
  font-weight: bold;
}

nav a:hover {
  color: #0056b3;
}

/* Formulir utama */
main {
  max-width: 800px;
  margin: 60px auto;
  background-color: #ffffff;
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 0 15px rgba(0,0,0,0.05);
}

form label {
  display: block;
  margin-bottom: 15px;
  font-weight: 500;
}

form input[type="text"],
form input[type="number"],
form input[type="file"],
form select,
form textarea {
  width: 100%;
  padding: 12px;
  margin-top: 5px;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 16px;
}

.checkbox-label {
  margin-top: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}

button[type="submit"] {
  background-color: #28a745;
  border: none;
  color: white;
  font-size: 16px;
  padding: 12px 20px;
  margin-top: 20px;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.3s;
}

button[type="submit"]:hover {
  background-color: #218838;
}

/* Footer */
footer {
  background: #0e83cd;
  color: white;
  padding: 40px 20px;
  margin-top: 60px;
}

footer h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

footer p {
  font-size: 16px;
}

footer button {
  background-color: #ffffff;
  color: #0e83cd;
  font-weight: bold;
  border: none;
  padding: 10px 20px;
  margin-top: 10px;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.3s;
}

footer button:hover {
  background-color: #f0f0f0;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  z-index: 10000;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: #fff;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

.modal-content {
  max-height: 80vh;
  overflow-y: auto;
}

/* Responsive */
@media (max-width: 768px) {
  header h1 {
    font-size: 28px;
  }

  main {
    padding: 20px;
    margin: 40px 10px;
  }

  footer {
    padding: 30px 15px;
  }
}