@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;600;700&family=Varela&display=swap');

:root {
  --pd-background: #f5f7fa;
  --pd-surface: #ffffff;
  --pd-text-primary: #2b2b2b;
  --pd-text-secondary: #505050;
  --pd-accent: #747474;
  --pd-accent-dark: #565656;
  --pd-border: #e0e5ec;
}

html,
body {
  min-height: 100%;
}

body {
  background-color: var(--pd-background);
  color: var(--pd-text-secondary);
  font-family: 'Open Sans', sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  margin: 0;
}

main {
  background-color: var(--pd-surface);
  border-radius: 16px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
  max-width: 960px;
  padding: 3rem 3.5rem;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--pd-text-primary);
  font-family: 'Varela', sans-serif;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 1.25rem;
}

h1 {
  font-size: clamp(2rem, 3vw + 1rem, 2.75rem);
  line-height: 1.2;
}

h2 {
  font-size: clamp(1.5rem, 2vw + 0.75rem, 2rem);
  line-height: 1.3;
}

p {
  margin-bottom: 1.5rem;
}

.lead {
  color: var(--pd-text-primary);
  font-size: 1.1rem;
}

section {
  border-top: 1px solid var(--pd-border);
  margin-top: 2.5rem;
  padding-top: 2rem;
}

section:first-of-type {
  border-top: 0;
  margin-top: 0;
  padding-top: 0;
}

ul {
  list-style: none;
  margin: 0 0 1.75rem 0;
  padding: 0;
}

ul li {
  padding-left: 1.75rem;
  position: relative;
  margin-bottom: 0.75rem;
}

ul li::before {
  background: linear-gradient(135deg, var(--pd-accent), var(--pd-accent-dark));
  border-radius: 50%;
  content: '';
  height: 0.5rem;
  left: 0.5rem;
  position: absolute;
  top: 0.6rem;
  width: 0.5rem;
}

a {
  color: var(--pd-accent);
  font-weight: 600;
  text-decoration: none;
}

a:hover,
a:focus {
  color: var(--pd-accent-dark);
  text-decoration: none;
}

.btn-primary {
  background-color: transparent;
  border: 2px solid var(--pd-accent);
  border-radius: 999px;
  color: var(--pd-accent);
  font-family: 'Varela', sans-serif;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  padding: 0.75rem 2.5rem;
  text-transform: uppercase;
}

.btn-primary:hover,
.btn-primary:focus {
  background-color: var(--pd-accent);
  border-color: var(--pd-accent);
  color: #ffffff;
}

.btn-primary:focus-visible {
  box-shadow: 0 0 0 0.25rem rgba(116, 116, 116, 0.35);
  outline: none;
}

@media (max-width: 991.98px) {
  main {
    box-shadow: none;
    border-radius: 0;
    padding: 2.5rem 1.5rem;
  }
}

@media (max-width: 575.98px) {
  body {
    font-size: 0.95rem;
  }

  main {
    padding: 2rem 1.25rem;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  ul li {
    padding-left: 1.5rem;
  }

  ul li::before {
    left: 0.25rem;
  }
}