/* === Reset === */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, p, ul, dl, dt, dd { margin: 0; padding: 0; }
ul { list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; }

/* === Tokens === */
:root {
  --bg: #ffffff;
  --bg-soft: #f6f7f6;
  --bg-accent: #e6f4f1;

  --fg: #0a0a0a;
  --fg-muted: #555555;
  --fg-subtle: #8a8a8a;

  --border: rgba(10, 10, 10, 0.10);
  --border-strong: rgba(10, 10, 10, 0.18);

  --accent: #0e766e;
  --accent-strong: #0a5a55;
  --accent-fg: #ffffff;

  --radius: 10px;
  --radius-lg: 14px;

  --container: 1080px;
  --container-narrow: 760px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, "Noto Sans", sans-serif;
}

/* === Base === */
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--accent); }
a:hover { color: var(--accent-strong); }

h1, h2, h3, h4 { font-weight: 500; line-height: 1.25; letter-spacing: -0.01em; }
h1 { font-size: 40px; }
h2 { font-size: 28px; }
h3 { font-size: 18px; }
h4 { font-size: 14px; color: var(--fg-muted); text-transform: uppercase; letter-spacing: 0.06em; }

@media (max-width: 640px) {
  h1 { font-size: 30px; }
  h2 { font-size: 24px; }
}

p { color: var(--fg-muted); }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* === Header === */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.brand {
  font-weight: 500;
  font-size: 18px;
  color: var(--fg);
  letter-spacing: -0.01em;
}
.nav nav {
  display: flex;
  gap: 28px;
}
.nav nav a {
  font-size: 14px;
  color: var(--fg-muted);
}
.nav nav a:hover { color: var(--fg); }

@media (max-width: 640px) {
  .nav nav { display: none; }
}

/* === Hero === */
.hero {
  padding: 80px 0 56px;
  text-align: center;
}
.hero h1 { margin-bottom: 18px; }
.lead {
  font-size: 18px;
  color: var(--fg-muted);
  max-width: 600px;
  margin: 0 auto 32px;
}
.cta-row {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}
.hero-note {
  margin-top: 14px;
  font-size: 13px;
  color: var(--fg-subtle);
}

@media (max-width: 640px) {
  .hero { padding: 56px 0 40px; }
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 22px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 500;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: var(--accent-fg);
}
.btn-primary:hover {
  background: var(--accent-strong);
  color: var(--accent-fg);
}
.btn-secondary {
  background: transparent;
  color: var(--fg);
  border-color: var(--border-strong);
}
.btn-secondary:hover {
  background: var(--bg-soft);
  color: var(--fg);
}
.btn-block {
  display: flex;
  width: 100%;
}

/* === Sections === */
section { padding: 56px 0; }
.section-lead {
  text-align: center;
  max-width: 560px;
  margin: 12px auto 32px;
  color: var(--fg-muted);
}
section h2 { text-align: center; }

/* === Grids === */
.grid {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}
.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}
@media (max-width: 800px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .grid-3 { grid-template-columns: 1fr; }
}

/* === Benefit card === */
.card-benefit {
  background: var(--bg-soft);
  border-radius: var(--radius);
  padding: 22px;
}
.card-benefit .icon {
  width: 28px;
  height: 28px;
  color: var(--accent);
  margin-bottom: 14px;
}
.card-benefit h3 { margin-bottom: 6px; }
.card-benefit p { font-size: 14px; }

/* === Tariff card === */
.card-plan {
  position: relative;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
}
.card-plan h3 {
  margin-bottom: 12px;
  font-size: 16px;
}
.card-plan .price {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 6px;
}
.card-plan .amount {
  font-size: 30px;
  font-weight: 500;
  color: var(--fg);
  letter-spacing: -0.02em;
}
.card-plan .period {
  font-size: 13px;
  color: var(--fg-subtle);
}
.card-plan .plan-note {
  font-size: 13px;
  margin: 8px 0 18px;
  flex-grow: 1;
}
.card-plan .btn-block { margin-top: auto; }

.card-plan-featured {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}
.badge {
  position: absolute;
  top: -10px;
  left: 16px;
  background: var(--accent);
  color: var(--accent-fg);
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 6px;
  letter-spacing: 0.02em;
}

/* === Steps === */
.steps .step {
  padding: 16px 4px;
}
.step-num {
  display: inline-block;
  font-size: 28px;
  font-weight: 500;
  color: var(--fg-subtle);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}
.step h3 { margin-bottom: 4px; font-size: 16px; }
.step p { font-size: 14px; }

/* === FAQ === */
.faq .container { max-width: var(--container-narrow); }
.faq-list { margin-top: 32px; }
.faq-item {
  border-top: 1px solid var(--border);
  padding: 18px 0;
}
.faq-item:last-child { border-bottom: 1px solid var(--border); }
.faq-item dt {
  font-weight: 500;
  font-size: 15px;
  color: var(--fg);
  margin-bottom: 6px;
}
.faq-item dd {
  font-size: 14px;
  color: var(--fg-muted);
  margin-left: 0;
}

/* === Bottom CTA === */
.cta-bottom {
  background: var(--bg-soft);
  text-align: center;
  padding: 64px 0;
}
.cta-bottom h2 { margin-bottom: 8px; }
.cta-bottom p {
  margin-bottom: 22px;
  font-size: 16px;
}

/* === Footer === */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 48px 0 24px;
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}
@media (max-width: 800px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer-brand {
  font-weight: 500;
  font-size: 16px;
  margin-bottom: 8px;
}
.footer-tagline {
  font-size: 13px;
  color: var(--fg-muted);
  max-width: 280px;
}
.footer-col h4 { margin-bottom: 12px; }
.footer-col ul li {
  margin-bottom: 8px;
}
.footer-col ul a {
  color: var(--fg-muted);
  font-size: 14px;
}
.footer-col ul a:hover { color: var(--fg); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--fg-subtle);
}

/* === Focus === */
a:focus-visible, .btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* === Legal document pages (offer, privacy, contacts) === */
.doc-page main { padding: 48px 0 80px; }
.doc-page .container { max-width: 760px; }
.doc-page h1 {
  font-size: 26px;
  margin-bottom: 8px;
}
.doc-page .doc-meta {
  font-size: 13px;
  color: var(--fg-subtle);
  margin-bottom: 36px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}
.doc-page h2 {
  font-size: 18px;
  text-align: left;
  margin: 32px 0 12px;
  letter-spacing: -0.005em;
}
.doc-page h3 {
  font-size: 15px;
  margin: 20px 0 8px;
}
.doc-page p,
.doc-page li {
  font-size: 15px;
  color: var(--fg);
  line-height: 1.7;
}
.doc-page p { margin: 10px 0; }
.doc-page ol,
.doc-page ul {
  margin: 12px 0;
  padding-left: 22px;
}
.doc-page ol li,
.doc-page ul li {
  margin: 6px 0;
  list-style: revert;
  padding-left: 2px;
}
.doc-page ul { list-style: disc; }
.doc-page .clause-list {
  list-style: none;
  padding-left: 0;
}
.doc-page .clause-list > li {
  margin: 8px 0;
  padding-left: 0;
}
.doc-page table.requisites {
  width: 100%;
  margin: 16px 0 8px;
  border-collapse: collapse;
}
.doc-page table.requisites td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  vertical-align: top;
}
.doc-page table.requisites td:first-child {
  color: var(--fg-muted);
  width: 38%;
  white-space: nowrap;
}
.doc-page .doc-note {
  margin-top: 32px;
  padding: 14px 18px;
  background: var(--bg-soft);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--fg-muted);
}
.doc-page .back-link {
  display: inline-block;
  margin-bottom: 24px;
  font-size: 14px;
  color: var(--fg-muted);
}
.doc-page .back-link:hover { color: var(--fg); }