* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: Arial, sans-serif;
  line-height: 1.5;
  background: white;
  color: black;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  background: black;
  color: white;
  text-align: center;
  padding: 1.5em 0;
}

header h1 {
  font-size: 2rem;
  margin-bottom: 0.5em;
}

header p {
  font-size: 1rem;
}
main {
  flex: 1;
  padding: 2em;
  max-width: 600px;
  margin: 0 auto;
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}
form {
  display: flex;
  flex-direction: column;
}

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

label {
  display: block;
  font-weight: bold;
  margin-bottom: 0.5em;
}

input,
select,
button {
  width: 100%;
  padding: 0.7em;
  border: 1px solid;
  border-radius: 20px;
  font-size: 1rem;
}
button {
  background: black;
  color: whitesmoke;
  border: none;
  cursor: pointer;
  transition: background 0.3s;
}

button:hover {
  background: black;
}
.error-message {
  color: red;
  font-weight: bold;
  display: none;
}

.result-message {
  color: green;
  font-weight: bold;
  display: none;
}
footer {
  text-align: center;
  padding: 1em;
  background: black;
  color: whitesmoke;
}
#landing {
  text-align: center;
  margin: 2em auto;
  padding: 2em;
  background: #f9f9f9;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

#landing h2 {
  font-size: 1.8rem;
  margin-bottom: 1em;
  color: #333;
}

#landing p {
  font-size: 1.1rem;
  margin-bottom: 1.5em;
  color: #555;
}

.cta-button {
  display: inline-block;
  background: black;
  color: white;
  padding: 0.8em 1.5em;
  border-radius: 20px;
  text-decoration: none;
  font-size: 1rem;
  transition: background 0.3s ease-in-out;
}

.cta-button:hover {
  background: darkgray;
  color: black;
}