:root {
  --bg: #f8fafc;
  --fg: #1f2937;
  --card-bg: #ffffff;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --border: #e5e7eb;
  --radius: 0.75rem;
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Inter', 'Segoe UI', sans-serif;
  background-color: var(--bg);
  color: var(--fg);
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  min-height: 100vh;
}

.container {
  background-color: var(--card-bg);
  max-width: 720px;
  width: 100%;
  margin: 4rem 1rem;
  padding: 2.5rem 2rem;
  border-radius: var(--radius);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.05);
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: #111827;
  text-align: center;
}

p {
  font-size: 1.125rem;
  margin-bottom: 2rem;
  text-align: center;
}

ul {
  padding-left: 1.5rem;
  margin-bottom: 2rem;
}

li {
  margin-bottom: 0.75rem;
  font-size: 1rem;
}

label {
  font-weight: 600;
  display: block;
  margin-bottom: 0.5rem;
}

select,
input[type="email"] {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  background-color: #f9fafb;
  margin-bottom: 1rem;
}

button {
  background-color: var(--primary);
  color: white;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.2s ease;
  width: 100%;
}

button:hover {
  background-color: var(--primary-hover);
}

a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}

a:hover {
  text-decoration: underline;
}

hr {
  margin: 2rem 0;
  border: none;
  border-top: 1px solid var(--border);
}

@media (min-width: 640px) {
  h1 {
    font-size: 3rem;
  }

  .container {
    margin: 6rem auto;
  }
}