:root {
  --tg-blue: #229ED9;
  --tg-blue-dark: #0f7eb5;
  --tg-blue-soft: #eaf6fd;
  --bg: #ffffff;
  --bg-soft: #f6f9fb;
  --text: #17212b;
  --text-muted: #62747f;
  --border: #e3eaee;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 4px 20px rgba(23, 33, 43, 0.06);
  --max-w: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
}

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

a { color: var(--tg-blue-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

img, svg { max-width: 100%; display: block; }

h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 12px; }
p { margin: 0 0 16px; color: var(--text-muted); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-wrap {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 19px;
  color: var(--text);
  flex-shrink: 0;
}
.logo:hover { text-decoration: none; }

.main-nav {
  display: flex;
  gap: 22px;
  flex: 1;
}

.main-nav a {
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
}
.main-nav a:hover { color: var(--tg-blue-dark); text-decoration: none; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--text);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; }

.btn-primary {
  background: var(--tg-blue);
  color: #fff;
}
.btn-primary:hover { background: var(--tg-blue-dark); }

.btn-secondary {
  background: var(--tg-blue-soft);
  color: var(--tg-blue-dark);
}
.btn-secondary:hover { background: #d9eefb; }

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--tg-blue); }

.btn-sm { padding: 9px 16px; font-size: 14px; }
.btn-block { width: 100%; }

/* ---------- Hero ---------- */
.hero {
  padding: 76px 0 64px;
  text-align: center;
}
.hero h1 {
  font-size: 44px;
  max-width: 780px;
  margin: 0 auto 18px;
}
.hero .lede {
  font-size: 18px;
  max-width: 620px;
  margin: 0 auto 32px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.hero-note {
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-muted);
}

.page-hero {
  padding: 56px 0 20px;
  text-align: center;
}
.page-hero h1 { font-size: 34px; margin-bottom: 10px; }
.page-hero p { max-width: 560px; margin: 0 auto; }

/* ---------- Sections ---------- */
section { padding: 64px 0; }
.section-soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 620px; margin: 0 auto 44px; }
.section-head .eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--tg-blue-dark);
  margin-bottom: 10px;
}
.section-head h2 { font-size: 30px; }

/* ---------- Feature grid ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
}
.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--tg-blue-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 20px;
}
.feature-card h3 { font-size: 17px; margin-bottom: 8px; }
.feature-card p { font-size: 14.5px; margin: 0; }

/* ---------- Steps ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: step;
}
.step {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
}
.step::before {
  counter-increment: step;
  content: counter(step);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--tg-blue);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}
.step h3 { font-size: 16px; margin-bottom: 6px; }
.step p { font-size: 14px; margin: 0; }

/* ---------- Pricing ---------- */
.plan-grid {
  display: grid;
  grid-template-columns: 1.1fr 2fr;
  gap: 24px;
  align-items: start;
}
.plan-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
}
.plan-card.free { background: var(--bg-soft); }
.plan-card h3 { font-size: 20px; }
.plan-price { font-size: 34px; font-weight: 800; margin: 10px 0 4px; }
.plan-price small { font-size: 15px; font-weight: 500; color: var(--text-muted); }
.plan-list { list-style: none; margin: 20px 0 0; padding: 0; }
.plan-list li {
  display: flex;
  gap: 10px;
  font-size: 14.5px;
  color: var(--text);
  padding: 7px 0;
  border-top: 1px solid var(--border);
}
.plan-list li:first-child { border-top: none; }
.check { color: var(--tg-blue-dark); font-weight: 700; }
.cross { color: #b8c2c8; font-weight: 700; }

.pro-tiers {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 20px;
}
.tier-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px;
  text-align: center;
  background: var(--bg-soft);
}
.tier-card.best {
  border-color: var(--tg-blue);
  background: var(--tg-blue-soft);
}
.tier-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  color: #fff;
  background: var(--tg-blue);
  padding: 3px 8px;
  border-radius: 999px;
  margin-bottom: 8px;
}
.tier-card .period { font-size: 13px; color: var(--text-muted); margin-bottom: 6px; }
.tier-card .price { font-size: 24px; font-weight: 800; }
.tier-card .per-month { font-size: 12.5px; color: var(--text-muted); margin-bottom: 12px; }

.compare-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 44px;
  font-size: 14.5px;
}
.compare-table th, .compare-table td {
  border: 1px solid var(--border);
  padding: 12px 16px;
  text-align: left;
}
.compare-table th { background: var(--bg-soft); }
.compare-table td:nth-child(2), .compare-table td:nth-child(3),
.compare-table th:nth-child(2), .compare-table th:nth-child(3) {
  text-align: center;
  width: 140px;
}

/* ---------- FAQ ---------- */
.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 18px 0;
}
.faq-item h3 { font-size: 16px; margin-bottom: 6px; }
.faq-item p { margin: 0; font-size: 14.5px; }

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--tg-blue);
  border-radius: var(--radius);
  padding: 48px;
  text-align: center;
  color: #fff;
}
.cta-band h2 { color: #fff; }
.cta-band p { color: rgba(255,255,255,0.85); }
.cta-band .btn-secondary { background: #fff; color: var(--tg-blue-dark); }
.cta-band .btn-secondary:hover { background: #eef8fd; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 52px 0 24px;
  margin-top: 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
  gap: 32px;
}
.footer-brand p { font-size: 14px; margin-top: 10px; }
.footer-col h4 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 14px;
}
.footer-col a {
  display: block;
  color: var(--text);
  font-size: 14.5px;
  margin-bottom: 10px;
}
.footer-company p { font-size: 13.5px; margin-bottom: 10px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  margin-top: 36px;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12.5px;
  color: var(--text-muted);
}
.footer-bottom p { margin: 0; font-size: 12.5px; }

/* ---------- Legal pages ---------- */
.legal-doc {
  max-width: 760px;
  margin: 0 auto;
  padding-bottom: 40px;
}
.legal-doc h2 {
  font-size: 21px;
  margin-top: 40px;
  padding-top: 8px;
}
.legal-doc h2:first-of-type { margin-top: 0; }
.legal-doc ul { color: var(--text-muted); padding-left: 20px; }
.legal-doc li { margin-bottom: 10px; }
.legal-updated {
  color: var(--text-muted);
  font-size: 14px;
  text-align: center;
  margin-bottom: 8px;
}
.legal-box {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 22px;
  margin-top: 40px;
  font-size: 14.5px;
}
.legal-box p { margin: 4px 0; color: var(--text); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .plan-grid { grid-template-columns: 1fr; }
  .pro-tiers { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 16px 24px;
    gap: 16px;
  }
  .main-nav.open { display: flex; }
  .nav-toggle { display: block; }
  .nav-wrap .btn-sm { display: none; }
  .hero h1 { font-size: 30px; }
  .feature-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .pro-tiers { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-band { padding: 32px 20px; }
}