:root {
  --paper: #ffffff;
  --bg: #ffffff;
  --fg: #111111;
  --muted: #5c5c5c;
  --line: #e6e6e6;
  --soft: #f5f5f5;
  --accent: #2563eb;
  --danger: #b42318;
  --danger-bg: #fef3f2;
  --font: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 var(--font);
}

a { color: inherit; }

h1, h2, h3 {
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0;
}

.skip {
  position: absolute;
  left: 8px;
  top: -40px;
  background: var(--fg);
  color: #fff;
  padding: 6px 8px;
}

.skip:focus { top: 8px; }

.wrap {
  width: min(1040px, calc(100% - 32px));
  margin: 0 auto;
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.header {
  height: 56px;
  border-bottom: 1px solid var(--line);
}

.header .wrap { height: 56px; }

.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  text-decoration: none;
}

.mark {
  width: 18px;
  height: 18px;
  background: var(--accent);
}

.nav { display: flex; gap: 20px; }
.nav a, .actions > a, .footer a {
  text-decoration: none;
  color: var(--muted);
  font-size: 14px;
}
.nav a:hover, .actions > a:hover, .footer a:hover { color: var(--fg); }

.actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 14px;
  border: 1px solid var(--fg);
  background: var(--fg);
  color: #fff;
  border-radius: 6px;
  font: 500 14px var(--font);
  text-decoration: none;
  cursor: pointer;
}

.btn:hover { background: #000; }
.btn:disabled { opacity: 0.55; cursor: wait; }

.btn-ghost {
  background: #fff;
  color: var(--fg);
}

.btn-ghost:hover { background: var(--soft); }
.btn-block { width: 100%; }

.burger {
  display: none;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  background: #fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 18 18'%3E%3Cpath stroke='%23111' stroke-width='1.5' d='M3 5h12M3 9h12M3 13h12'/%3E%3C/svg%3E") center no-repeat;
  cursor: pointer;
}

.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 80px 0;
}

.hero h1 { font-size: clamp(40px, 6vw, 64px); }

.lede {
  margin: 12px 0 0;
  color: var(--muted);
  max-width: 42ch;
}

.cta {
  display: flex;
  gap: 8px;
  margin-top: 24px;
}

.panel {
  border: 1px solid var(--line);
  background: var(--soft);
}

.panel-h,
.item {
  display: flex;
  gap: 16px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}

.panel-h {
  justify-content: space-between;
  font-size: 13px;
  color: var(--muted);
}

.item:last-child { border-bottom: 0; }
.item b {
  width: 48px;
  font-weight: 500;
  color: var(--muted);
}
.item strong { display: block; font-size: 14px; }
.item span { color: var(--muted); font-size: 13px; }

.block { padding: 0 0 80px; }
.block h2 { font-size: 24px; margin-bottom: 20px; }

.grid3, .grid2 {
  display: grid;
  gap: 12px;
}

.grid3 { grid-template-columns: repeat(3, 1fr); }
.grid2 { grid-template-columns: 1fr 1fr; }

.grid3 article,
.price {
  border: 1px solid var(--line);
  padding: 20px;
}

.grid3 h3, .price h3 { font-size: 16px; }
.grid3 p { margin: 8px 0 0; color: var(--muted); font-size: 14px; }

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps li {
  border: 1px solid var(--line);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.steps span {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.sum {
  font-size: 28px;
  font-weight: 600;
  margin: 8px 0 16px;
}

.sum small {
  font-size: 14px;
  font-weight: 400;
  color: var(--muted);
}

.price ul {
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-size: 14px;
}

.price li {
  padding: 8px 0;
  border-top: 1px solid var(--line);
}

.footer {
  border-top: 1px solid var(--line);
  padding: 20px 0;
  color: var(--muted);
  font-size: 13px;
}

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

.legal { padding: 48px 0 80px; max-width: 640px; }
.legal h1 { font-size: 32px; margin-bottom: 16px; }
.legal p { color: var(--muted); }
.legal a { color: var(--fg); }

.auth-main {
  min-height: calc(100vh - 56px);
  display: grid;
  place-items: center;
  padding: 32px 16px;
}

.box {
  width: min(400px, 100%);
  border: 1px solid var(--line);
  padding: 28px;
}

.box h1 { font-size: 24px; }

.box label {
  display: grid;
  gap: 6px;
  margin-top: 16px;
  font-size: 13px;
  font-weight: 500;
}

.box input {
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 10px;
  font: 16px var(--font);
  background: #fff;
  color: var(--fg);
}

.box input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.box .btn { margin-top: 20px; }

.err {
  margin-top: 16px;
  padding: 10px 12px;
  background: var(--danger-bg);
  color: var(--danger);
  font-size: 14px;
}

.fine { margin: 16px 0 0; font-size: 13px; }
.fine a { color: var(--muted); }

@media (max-width: 800px) {
  .hero, .grid3, .grid2, .steps { grid-template-columns: 1fr; }
  .hero { padding: 40px 0 56px; gap: 28px; }
  .nav { display: none; }
  .burger { display: block; }
  .header.is-open .nav {
    display: flex;
    flex-direction: column;
    position: absolute;
    left: 0;
    right: 0;
    top: 56px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 12px 16px 16px;
  }
  .footer .row { flex-direction: column; align-items: flex-start; }
}