/* General Body */
body {
  font-family: 'Roboto', sans-serif;
  margin: 0;
  background: #f5f5f5;
  color: #333;
}

/* Header Navigation */
header {
  background: #4285f4;
  color: white;
  padding: 1em;
  text-align: center;
}

header nav a {
  margin: 0 1.5em;
  color: #fff;
  text-decoration: none;
  font-weight: bold;
}

main {
  padding: 2em;
  text-align: center;
}

h1 {
  color: #4285f4;
  margin-bottom: 1.5em;
}

/* Modal Styles (Flat, Clean, Responsive) */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  padding-top: 50px;
  overflow-y: auto;
}

.modal-content {
  background-color: #fff;
  margin: 5% auto;
  padding: 2em;
  border-radius: 8px;
  width: 90%;
  max-width: 400px;
  box-sizing: border-box;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
}

.close {
  color: #888;
  font-size: 1.5em;
  font-weight: bold;
  position: absolute;
  top: 10px;
  right: 20px;
  cursor: pointer;
}

.close:hover, .close:focus {
  color: #333;
  text-decoration: none;
}

h2 {
  font-size: 1.5em;
  margin-bottom: 1em;
  color: #4285f4;
}

.form-group {
  margin-bottom: 1em;
}

input[type="text"], input[type="password"], input[type="email"] {
  width: 100%;
  padding: 12px;
  margin: 8px 0;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 1em;
  box-sizing: border-box;
}

button {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 4px;
  background-color: #4285f4;
  color: white;
  font-size: 1.1em;
  cursor: pointer;
  margin-top: 1em;
}

button:hover {
  background-color: #357ae8;
}

/* Responsive Design */
@media (max-width: 600px) {
  .modal-content {
    padding: 1.5em;
  }
  input[type="text"], input[type="password"], input[type="email"], button {
    font-size: 1em;
    padding: 10px;
  }
}