:root {
  --modal-duration: 1s;
}

* {
  box-sizing: border-box;
}

body {
  font-family: sans-serif;
  margin: 0;
  transition: transform 0.3s ease;
}

header {
  background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),
    url(https://images.unsplash.com/photo-1438786657495-640937046d18?crop=entropy&cs=tinysrgb&fm=jpg&ixlib=rb-1.2.1&q=80&raw_url=true&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=1170);
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
}

.content-container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.content-container h1 {
  font-size: 4rem;
  color: #fff;
}

.content-container p {
  width: 600px;
  text-align: center;
  margin-bottom: 40px;
  color: #fff;
  line-height: 24px;
}

.cta-btn {
  padding: 12px 30px;
  font-size: 1.2rem;
  outline: none;
  border: none;
  background-color: crimson;
  color: #fff;
  cursor: pointer;
}

.modal-container {
  background-color: rgba(0, 0, 0, 0.6);
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

.modal {
  background: #fff;
  border-radius: 5px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
  position: absolute;
  overflow: hidden;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-width: 100%;
  width: 400px;
}

.modal-content {
  padding: 20px;
}

.modal-form div {
  margin: 20px 0;
}

.modal-form label {
  display: block;
  margin-bottom: 6px;
}

.modal-form .form-input {
  padding: 8px;
  width: 100%;
}

.close-btn {
  background: transparent;
  border: none;
  font-size: 25px;
  position: absolute;
  top: 5px;
  right: 12px;
  cursor: pointer;
}

.modal-container .submit-btn {
  padding: 10px 30px;
  font-weight: bold;
  background: crimson;
  border: none;
  color: #fff;
  cursor: pointer;
}

/* JavaScript */
.modal-container.show-modal {
  display: block;
}