:root {
  --brt-dark: #14202b;
  --brt-blue: #1769aa;
  --brt-blue-dark: #0d4f83;
  --brt-light: #f4f7fa;
  --brt-border: #dfe6ed;
  --brt-text: #263442;
  --brt-muted: #657482;
  --brt-white: #ffffff;
}

.brt,
.brt * {
  box-sizing: border-box;
}

.brt {
  max-width: 1180px;
  margin: 0 auto;
  color: var(--brt-text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

.brt a {
  color: var(--brt-blue);
  text-decoration: none;
}

.brt a:hover {
  color: var(--brt-blue-dark);
}

.brt-section {
  padding: 64px 24px;
}

.brt-section--gray {
  background: var(--brt-light);
}

.brt-hero {
  padding: 80px 40px;
  background: linear-gradient(120deg, #edf5fb, #ffffff);
  border-radius: 18px;
  margin-bottom: 20px;
}

.brt-hero h1 {
  max-width: 820px;
  margin: 0 0 20px;
  color: var(--brt-dark);
  font-size: clamp(32px, 5vw, 58px);
  line-height: 1.1;
}

.brt-hero p {
  max-width: 760px;
  margin: 0 0 14px;
  color: var(--brt-muted);
  font-size: 19px;
}

.brt-label {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--brt-blue);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.brt h2 {
  margin: 0 0 16px;
  color: var(--brt-dark);
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.2;
}

.brt h3 {
  margin: 0 0 10px;
  color: var(--brt-dark);
  font-size: 20px;
  line-height: 1.3;
}

.brt-intro {
  max-width: 780px;
  margin: 0 0 28px;
  color: var(--brt-muted);
}

.brt-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.brt-grid--2 {
  grid-template-columns: repeat(2, 1fr);
}

.brt-card {
  height: 100%;
  padding: 24px;
  background: var(--brt-white);
  border: 1px solid var(--brt-border);
  border-radius: 14px;
}

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

.brt-card ul,
.brt-list {
  margin: 0;
  padding-left: 20px;
  color: var(--brt-muted);
}

.brt-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.brt-button {
  display: inline-block;
  padding: 13px 22px;
  border-radius: 8px;
  background: var(--brt-blue);
  color: #fff !important;
  font-weight: 700;
  transition: .2s;
}

.brt-button:hover {
  background: var(--brt-blue-dark);
}

.brt-button--light {
  background: #fff;
  color: var(--brt-blue) !important;
  border: 1px solid var(--brt-blue);
}

.brt-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  counter-reset: step;
}

.brt-step {
  position: relative;
  padding: 22px 18px 20px;
  background: #fff;
  border: 1px solid var(--brt-border);
  border-radius: 14px;
}

.brt-step::before {
  display: block;
  margin-bottom: 12px;
  color: var(--brt-blue);
  font-size: 28px;
  font-weight: 700;
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
}

.brt-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.brt-link-card {
  display: block;
  padding: 20px;
  background: #fff;
  border: 1px solid var(--brt-border);
  border-radius: 12px;
}

.brt-link-card strong {
  display: block;
  margin-bottom: 5px;
  color: var(--brt-dark);
}

.brt-link-card span {
  color: var(--brt-muted);
  font-size: 14px;
}

.brt-faq details {
  padding: 18px 20px;
  background: #fff;
  border: 1px solid var(--brt-border);
  border-radius: 10px;
}

.brt-faq details + details {
  margin-top: 10px;
}

.brt-faq summary {
  cursor: pointer;
  color: var(--brt-dark);
  font-weight: 700;
}

.brt-faq p {
  margin: 12px 0 0;
  color: var(--brt-muted);
}

.brt-contact {
  padding: 42px 30px;
  background: var(--brt-dark);
  border-radius: 18px;
  color: #fff;
}

.brt-contact h2 {
  color: #fff;
}

.brt-contact p {
  max-width: 720px;
  color: #d9e4ed;
}

.brt-contact .brt-button--light {
  background: transparent;
  border-color: #fff;
  color: #fff !important;
}

.brt-note {
  padding: 18px 20px;
  background: #edf5fb;
  border-left: 4px solid var(--brt-blue);
  color: var(--brt-text);
}

.brt-footer {
  padding: 28px 24px 50px;
  color: var(--brt-muted);
  font-size: 14px;
  text-align: center;
}

@media (max-width: 800px) {
  .brt-hero {
    padding: 52px 24px;
  }

  .brt-section {
    padding: 45px 18px;
  }

  .brt-grid,
  .brt-grid--2,
  .brt-links,
  .brt-steps {
    grid-template-columns: 1fr;
  }

  .brt-hero p {
    font-size: 17px;
  }
}