:root {
  --color-primary: #cf142b;
  --color-secondary: #002a8f;
  --color-white: #ffffff;
  --color-light: #f8f9fa;
  --color-dark: #1a1a1a;
  --color-muted: #6c757d;
  --color-border: #dee2e6;
  --font-body: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --max-width: 72rem;
  --radius: 0.5rem;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  line-height: 1.6;
  color: var(--color-dark);
  background-color: var(--color-white);
}

a {
  color: var(--color-secondary);
}

a:hover,
a:focus {
  color: var(--color-primary);
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4rem;
  gap: 1rem;
}

.logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-dark);
  text-decoration: none;
}

.logo:hover,
.logo:focus {
  color: var(--color-primary);
}

.main-nav {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.main-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--color-dark);
}

.main-nav a:hover,
.main-nav a:focus {
  color: var(--color-primary);
  text-decoration: underline;
}

.hero {
  background: linear-gradient(135deg, var(--color-secondary) 0%, #003cb5 100%);
  color: var(--color-white);
  padding: 5rem 0;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin: 0 0 1rem;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.125rem;
  max-width: 50rem;
  margin: 0 auto 2rem;
  opacity: 0.95;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color 0.2s ease, transform 0.1s ease;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover,
.btn-primary:focus {
  background-color: #a61022;
  color: var(--color-white);
}

.section {
  padding: 4rem 0;
}

.section-alt {
  background-color: var(--color-light);
}

.section h2 {
  font-size: 2rem;
  margin: 0 0 1.5rem;
  color: var(--color-secondary);
}

.section p {
  max-width: 50rem;
  margin: 0 0 1.5rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.card h3 {
  margin: 0 0 0.5rem;
  color: var(--color-primary);
}

.card p {
  margin: 0;
  color: var(--color-muted);
}

.value-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
}

.value-list li {
  padding-left: 1.5rem;
  position: relative;
}

.value-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.signup-form {
  max-width: 36rem;
  display: grid;
  gap: 1.25rem;
  margin-top: 2rem;
}

.form-group {
  display: grid;
  gap: 0.375rem;
}

.form-group label {
  font-weight: 600;
  font-size: 0.95rem;
}

.form-group input[type='text'],
.form-group input[type='email'],
.form-group input[type='tel'],
.form-group textarea {
  padding: 0.75rem;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.form-checkbox input {
  margin-top: 0.35rem;
  width: 1rem;
  height: 1rem;
  accent-color: var(--color-secondary);
}

.form-checkbox label {
  font-weight: 400;
  line-height: 1.5;
}

.form-message {
  margin-top: 1.25rem;
  padding: 1rem;
  border-radius: var(--radius);
  display: none;
}

.form-message.success {
  display: block;
  background-color: #d1fae5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.form-message.error {
  display: block;
  background-color: #fee2e2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

.site-footer {
  background-color: var(--color-dark);
  color: var(--color-white);
  padding: 1.5rem 0;
  text-align: center;
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .header-content {
    flex-direction: column;
    align-items: flex-start;
    padding-top: 1rem;
    padding-bottom: 1rem;
  }

  .main-nav {
    width: 100%;
    justify-content: flex-start;
  }

  .hero {
    padding: 3rem 0;
  }
}