* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  color: #1f2937;
  background: #ffffff;
}

.container {
  width: min(1100px, 90%);
  margin: 0 auto;
}

.narrow {
  max-width: 760px;
}

.site-header {
  border-bottom: 1px solid #e5e7eb;
  background: #ffffff;
}

.site-header .container {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.logo {
  color: #111827;
  font-size: 18px;
  font-weight: bold;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 24px;
}

nav a {
  color: #4b5563;
  text-decoration: none;
}

nav a:hover {
  color: #111827;
}

.hero {
  padding: 120px 0;

  background-image:
    linear-gradient(
      rgba(0, 0, 0, 0.60),
      rgba(0, 0, 0, 0.60)
    ),
    url("images/hero.jpg");

  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;

  text-align: center;
}

.hero .container {
  max-width: 850px;
}

.eyebrow {
  margin-bottom: 12px;
  font-size: 14px;
  font-weight: bold;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: #5b6472;
}

h1 {
  margin: 0 0 24px;
  font-size: clamp(42px, 6vw, 68px);
  line-height: 1.05;
  color: #111827;
}

h2 {
  margin-top: 0;
  font-size: 34px;
  line-height: 1.2;
  color: #111827;
}

h3 {
  margin-top: 0;
  color: #111827;
}

.hero h1 {
  color: white;
}

.hero .hero-text {
  color: #e5e7eb;
}

.hero .eyebrow {
  color: #e5e7eb;
}

.button {
  display: inline-block;
  padding: 13px 22px;
  border: none;
  border-radius: 6px;
  background: #111827;
  color: white;
  font-size: 16px;
  text-decoration: none;
  cursor: pointer;
}

.button:hover {
  opacity: 0.88;
}

.section {
  padding: 80px 0;
}

.alt-section {
  background: #f7f9fc;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 35px;
}

.card {
  padding: 28px;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  background: white;
}

.card p {
  margin-bottom: 0;
}

.example-section {
  background: #111827;
  color: #e5e7eb;
}

.example-section h2,
.example-section .eyebrow {
  color: white;
}

.flow {
  margin: 30px 0;
  padding: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-weight: bold;
}

.secondary-button {
  background: #374151;
}

.explanation {
  margin-top: 24px;
  padding: 20px;
  border-left: 4px solid #111827;
  background: #f3f4f6;
}

.hidden {
  display: none;
}

footer {
  padding: 30px 0;
  border-top: 1px solid #e5e7eb;
  color: #6b7280;
  text-align: center;
}

@media (max-width: 800px) {
  .site-header .container {
    flex-direction: column;
    justify-content: center;
    padding: 18px 0;
  }

  nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  .cards {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 70px 0;
  }
}