:root {
  --bg-dark: #0f172a;
  --bg-light: #f5f7fb;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --accent: #38bdf8;
  --text-dark: #0b1120;
  --text-muted: #4b5563;
  --surface: #ffffff;
  --border: rgba(15, 23, 42, 0.08);
  --radius: 16px;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Manrope', 'Segoe UI', sans-serif;
  margin: 0;
  color: var(--text-dark);
  background: #ffffff;
  line-height: 1.6;
}

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  position: static;
  width: auto;
  height: auto;
  padding: 8px 16px;
  background: var(--primary);
  color: #fff;
  border-radius: 8px;
  z-index: 1000;
}

.header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 0;
}

.logo {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-dark);
}

.nav {
  display: flex;
  gap: 20px;
}

.nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  box-shadow: 0 10px 30px rgba(37, 99, 235, 0.25);
}

.btn:hover,
.btn:focus {
  transform: translateY(-1px);
  box-shadow: 0 16px 36px rgba(37, 99, 235, 0.35);
}

.btn--ghost {
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary);
  box-shadow: none;
  border: 1px solid rgba(37, 99, 235, 0.25);
}

.btn--ghost:hover,
.btn--ghost:focus {
  background: rgba(37, 99, 235, 0.15);
}

.btn--link {
  background: transparent;
  color: var(--primary);
  box-shadow: none;
  padding-inline: 0;
}

.btn--link:hover,
.btn--link:focus {
  color: var(--primary-dark);
}

.btn--large {
  padding: 14px 36px;
  font-size: 1.1rem;
}

.hero {
  padding: 120px 0 72px;
  background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.12), transparent 55%),
              radial-gradient(circle at bottom right, rgba(56, 189, 248, 0.12), transparent 60%);
}

.hero__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 48px;
  align-items: center;
}

.hero__tag {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(56, 189, 248, 0.18);
  color: var(--primary-dark);
  font-weight: 600;
  border-radius: 999px;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2.1rem, 3vw, 2.8rem);
  margin: 0 0 20px;
  line-height: 1.2;
}

.hero__lead {
  margin-bottom: 20px;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.hero__list {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  display: grid;
  gap: 12px;
}

.hero__list li {
  position: relative;
  padding-left: 28px;
  color: var(--text-muted);
}

.hero__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
}

.hero__cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__media {
  justify-self: center;
}

.badges {
  padding: 12px 0 40px;
}

.badges__items {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.badge {
  padding: 10px 18px;
  background: rgba(15, 23, 42, 0.05);
  border-radius: 999px;
  font-weight: 600;
  color: var(--text-muted);
}

.section {
  padding: 80px 0;
}

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

.section__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 48px;
  align-items: center;
}

.section__content h2 {
  margin-top: 0;
  font-size: 2rem;
}

.section__content p {
  color: var(--text-muted);
  margin-bottom: 16px;
}

.section__lead {
  color: var(--text-muted);
  max-width: 780px;
  margin: 0 auto 40px;
  text-align: center;
}

.list-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 18px 35px rgba(15, 23, 42, 0.06);
}

.list-card h3 {
  margin-top: 0;
  margin-bottom: 12px;
}

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

.tariffs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.tariff-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  box-shadow: 0 22px 40px rgba(15, 23, 42, 0.08);
}

.tariff-card__badge {
  position: absolute;
  top: 18px;
  right: 18px;
  padding: 6px 12px;
  background: var(--accent);
  color: #0e7490;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
}

.tariff-card__price {
  font-size: 1.4rem;
  font-weight: 700;
  margin: 0;
}

.tariff-card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--text-muted);
}

.tariff-card--popular {
  border: 1px solid rgba(37, 99, 235, 0.3);
  transform: translateY(-8px);
}

.table-wrapper {
  margin-top: 40px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 18px 30px rgba(15, 23, 42, 0.06);
}

.table-wrapper h3 {
  margin-top: 0;
  margin-bottom: 16px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.data-table thead {
  background: rgba(37, 99, 235, 0.08);
}

.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid rgba(15, 23, 42, 0.06);
  color: var(--text-muted);
}

.data-table th {
  color: var(--text-dark);
  font-weight: 600;
}

.table-note {
  margin: 18px 0 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.check-list li {
  position: relative;
  padding-left: 28px;
  color: var(--text-muted);
}

.check-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--primary);
}

.os-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.os-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  font-weight: 600;
  color: var(--text-muted);
  box-shadow: 0 14px 26px rgba(15, 23, 42, 0.06);
}

.section--content {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(14, 116, 144, 0.05));
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.content-grid article {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 24px;
  box-shadow: 0 16px 28px rgba(15, 23, 42, 0.05);
}

.content-grid h3 {
  margin-top: 0;
  margin-bottom: 12px;
}

.faq {
  display: grid;
  gap: 16px;
}

.faq details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  box-shadow: 0 16px 26px rgba(15, 23, 42, 0.06);
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text-dark);
}

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

.section--content p,
.section--alt p {
  color: var(--text-muted);
}

.cta {
  background: linear-gradient(135deg, #1d4ed8, #1e40af);
  color: #fff;
  padding: 80px 0;
}

.cta__inner {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  align-items: center;
}

.cta h2 {
  margin: 0 0 12px;
  font-size: 2rem;
}

.footer {
  background: var(--bg-dark);
  color: #cbd5f5;
  padding: 40px 0 32px;
}

.footer__inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  align-items: start;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer__links a {
  color: #e2e8f0;
  text-decoration: none;
}

.footer__links a:hover,
.footer__links a:focus {
  text-decoration: underline;
}

.footer__note {
  grid-column: 1 / -1;
  margin: 0;
  color: rgba(226, 232, 240, 0.7);
  font-size: 0.9rem;
}

@media (max-width: 960px) {
  .hero__grid,
  .section__grid,
  .cta__inner {
    grid-template-columns: 1fr;
  }

  .header__inner {
    flex-wrap: wrap;
  }

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

  .hero {
    padding: 100px 0 60px;
  }

  .hero__media {
    order: -1;
  }

  .tariff-card--popular {
    transform: none;
  }

  .table-wrapper {
    padding: 18px;
  }
}

@media (max-width: 600px) {
  :root {
    font-size: 15px;
  }

  .hero__cta {
    flex-direction: column;
    align-items: stretch;
  }

  .header__inner {
    justify-content: center;
  }

  .btn,
  .btn--large {
    width: 100%;
  }

  .data-table th,
  .data-table td {
    padding: 10px 12px;
  }
}