/* Base */
* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  margin: 0;
  background-color: #f7f7f7;
  color: #111;
  line-height: 1.5;
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 2rem 1.5rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 8vw, 4rem);
  font-weight: 700;
  margin: 0 0 0.5rem 0;
  letter-spacing: -0.02em;
}

.hero .subtitle {
  font-size: clamp(1.125rem, 3vw, 1.5rem);
  font-weight: 500;
  color: #333;
  margin: 0 0 0.75rem 0;
}

.hero .description {
  font-size: 1rem;
  color: #555;
  max-width: 420px;
  margin: 0 0 2rem 0;
}

.hero .btn {
  display: inline-block;
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background-color: #111;
  border: none;
  border-radius: 12px;
  text-decoration: none;
  cursor: pointer;
  transition: opacity 0.2s;
}

.hero .btn:hover {
  opacity: 0.9;
}

.hero .btn:active {
  opacity: 0.8;
}

/* How It Works */
.how-it-works {
  padding: 4rem 1.5rem;
  max-width: 960px;
  margin: 0 auto;
}

.how-it-works h2 {
  font-size: 1.5rem;
  font-weight: 600;
  text-align: center;
  margin: 0 0 2.5rem 0;
}

.columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.column {
  text-align: center;
  padding: 1.5rem;
}

.column h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 0.5rem 0;
}

.column p {
  font-size: 0.9375rem;
  color: #555;
  margin: 0;
}

/* Footer */
.footer {
  text-align: center;
  padding: 2rem 1.5rem;
  font-size: 0.875rem;
  color: #666;
}

/* Confirm page */
.confirm-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 2rem 1.5rem;
}

.confirm-page .checkmark {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background-color: #34c759;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto 1.5rem;
}

.confirm-page h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 1rem 0;
}

.confirm-page .message {
  font-size: 1rem;
  color: #555;
  max-width: 360px;
  margin: 0;
  line-height: 1.6;
}

/* Responsive */
@media (max-width: 768px) {
  .columns {
    grid-template-columns: 1fr;
  }

  .column {
    padding: 1rem;
  }
}