:root {
  --paper: #edf1e8;
  --paper-2: #e1e9db;
  --ink: #15392a;
  --ink-soft: #44665a;
  --line: #a9c2b1;
  --seal: #2747b0;
  --on-ink: #edf1e8;
  --shadow: 0 1px 0 rgba(21, 57, 42, .08), 0 18px 40px -18px rgba(21, 57, 42, .45);
  --display: "Unbounded", "Arial Black", sans-serif;
  --text: "Onest", "Segoe UI", Roboto, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0e2219;
    --paper-2: #143024;
    --ink: #e4ede1;
    --ink-soft: #a2bbad;
    --line: #2f5a47;
    --seal: #93a9ff;
    --on-ink: #0e2219;
    --shadow: 0 18px 40px -18px rgba(0, 0, 0, .7);
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 1.0625rem/1.6 var(--text);
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-underline-offset: .18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--seal); outline-offset: 3px; border-radius: 4px; }

.wrap { width: min(1120px, 100% - 32px); margin-inline: auto; }

/* header */
.top { padding: 18px 0; }
.top .wrap { display: flex; align-items: center; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font: 700 1rem/1 var(--display); letter-spacing: -.01em; }
.brand svg { width: 34px; height: 34px; }
.top nav { display: flex; gap: 22px; margin-left: auto; font-size: .95rem; }
.top nav a { text-decoration: none; color: var(--ink-soft); }
.top nav a:hover { color: var(--ink); }
@media (max-width: 760px) { .top nav { display: none; } .top .btn { margin-left: auto; } }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; padding: 0 22px; border-radius: 12px;
  background: var(--ink); color: var(--on-ink);
  font: 600 1rem/1 var(--text); text-decoration: none; white-space: nowrap;
  transition: transform .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(1px); }
.btn svg { width: 20px; height: 20px; flex: none; }
.btn.small { min-height: 40px; padding: 0 16px; font-size: .92rem; }

/* hero */
.hero { padding: 40px 0 88px; }
.hero .wrap { display: grid; grid-template-columns: 1fr 1.08fr; gap: 56px; align-items: center; }
.hero h1 {
  margin: 0 0 22px;
  font: 800 clamp(2.5rem, 5.6vw, 4.5rem)/1.02 var(--display);
  letter-spacing: -.035em;
}
.lead { margin: 0 0 32px; max-width: 34ch; font-size: 1.2rem; color: var(--ink-soft); }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 24px; }
.note { margin: 18px 0 0; font-size: .92rem; color: var(--ink-soft); }
@media (max-width: 900px) {
  .hero { padding: 16px 0 64px; }
  .hero .wrap { grid-template-columns: 1fr; gap: 40px; }
}

/* the banknote */
.bill {
  position: relative; aspect-ratio: 2 / 1; container-type: inline-size;
  color: var(--ink); border-radius: 10px; box-shadow: var(--shadow);
  transform: rotate(-3deg);
}
.bill > svg.frame { position: absolute; inset: 0; width: 100%; height: 100%; border-radius: 10px; }
.bill > svg.frame path { opacity: .75; }
.bill-inner {
  position: absolute; inset: 4.4cqw; border-radius: 4px;
  background:
    repeating-linear-gradient(115deg, transparent 0 3px, color-mix(in srgb, var(--line) 22%, transparent) 3px 4px),
    var(--paper-2);
  outline: 1px solid var(--line); outline-offset: -1cqw;
  display: grid;
  grid-template-columns: 36% 1fr;
  grid-template-rows: auto 1fr auto;
  padding: 2.8cqw 6cqw 2.4cqw;
}
.bill .num {
  position: absolute; z-index: 1; display: grid; place-items: center;
  width: 10cqw; height: 10cqw; border-radius: 50%;
  background: var(--paper-2); outline: 1.5px solid var(--ink); outline-offset: -.8cqw;
  font: 800 5.6cqw/1 var(--display);
}
.bill .num.tl { top: 1.4cqw; left: 1.4cqw; }
.bill .num.tr { top: 1.4cqw; right: 1.4cqw; }
.bill .num.bl { bottom: 1.4cqw; left: 1.4cqw; }
.bill .num.br { bottom: 1.4cqw; right: 1.4cqw; }
.bill .head { grid-column: 1 / -1; display: flex; justify-content: space-between; align-items: center; gap: 1.5cqw; padding-inline: 1.5cqw; }
.bill .title { font: 700 3.4cqw/1.1 var(--display); letter-spacing: .02em; white-space: nowrap; }
.bill .serial { font: 600 1.6cqw/1 var(--display); color: var(--seal); letter-spacing: .1em; font-variant-numeric: tabular-nums; white-space: nowrap; }
.bill .seal { grid-row: 2; align-self: center; justify-self: center; width: 100%; max-width: 27cqw; }
.bill .seal svg { width: 100%; height: auto; overflow: visible; }
.bill .seal .rose path { fill: none; stroke: var(--ink); stroke-width: .45; opacity: .55; }
.bill .seal .rose path.b { stroke: var(--seal); opacity: .45; }
.bill .price { grid-row: 2; align-self: center; text-align: center; }
.bill .price b { display: block; font: 800 13cqw/.95 var(--display); letter-spacing: -.045em; }
.bill .price span { display: block; margin-top: 1.6cqw; font: 600 2.6cqw/1.3 var(--text); color: var(--ink-soft); }
.bill .motto { grid-column: 1 / -1; text-align: center; font: 500 2.3cqw/1 var(--text); color: var(--ink-soft); }

@media (prefers-reduced-motion: no-preference) {
  .bill { animation: lay .9s cubic-bezier(.2, .8, .2, 1) both; }
  .bill .seal .rose path { stroke-dasharray: 100; stroke-dashoffset: 100; animation: draw 2.2s .35s ease-out forwards; }
}
@keyframes lay { from { opacity: 0; transform: rotate(-9deg) translateY(24px) scale(.96); } }
@keyframes draw { to { stroke-dashoffset: 0; } }

/* sections */
section { padding: 72px 0; }
section + section { border-top: 1px solid var(--line); }
h2 { margin: 0 0 14px; font: 700 clamp(1.8rem, 3.6vw, 2.6rem)/1.1 var(--display); letter-spacing: -.03em; }
.sub { margin: 0 0 40px; max-width: 60ch; color: var(--ink-soft); }

.perks { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 56px; margin: 0; }
.perks div { padding: 22px 0; border-top: 1px solid var(--line); }
.perks dt { font-weight: 650; font-size: 1.12rem; margin-bottom: 4px; }
.perks dd { margin: 0; color: var(--ink-soft); max-width: 46ch; }
@media (max-width: 760px) { .perks { grid-template-columns: 1fr; } }

/* tariffs */
.plans { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.plan { border: 1.5px solid var(--ink); border-radius: 14px; padding: 28px 28px 20px; background: var(--paper-2); }
.plan header { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap; margin-bottom: 18px; }
.plan h3 { margin: 0; font: 700 1.5rem/1.1 var(--display); letter-spacing: -.02em; }
.plan .dev { color: var(--ink-soft); }
.plan .from { margin: 0 0 18px; font: 800 2.6rem/1 var(--display); letter-spacing: -.04em; }
.plan .from small { display: block; margin-top: 8px; font: 500 1rem/1.3 var(--text); color: var(--ink-soft); letter-spacing: 0; }
.plan table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.plan th { text-align: right; font-weight: 500; font-size: .85rem; color: var(--ink-soft); padding: 0 0 8px; }
.plan th:first-child, .plan td:first-child { text-align: left; }
.plan td { text-align: right; padding: 11px 0; border-top: 1px solid var(--line); white-space: nowrap; }
.plan td:first-child { padding-right: 8px; white-space: nowrap; }
.plan td.rub { font-weight: 650; }
.plan td .pm { display: block; font-size: .8rem; color: var(--ink-soft); font-weight: 400; }
.plan .cell-gap { padding-left: 14px; }
.terms-note { margin: 28px 0 0; color: var(--ink-soft); max-width: 70ch; }
@media (max-width: 760px) {
  .plans { grid-template-columns: 1fr; }
  .plan { padding: 22px 18px 14px; }
  .plan table { font-size: .95rem; }
  .lead { font-size: 1.1rem; }
}

/* steps */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; counter-reset: s; }
.steps li { counter-increment: s; }
.steps li::before {
  content: "OB-0" counter(s);
  display: block; margin-bottom: 14px; padding-bottom: 10px; border-bottom: 1.5px solid var(--ink);
  font: 600 .85rem/1 var(--display); letter-spacing: .12em; color: var(--seal);
}
.steps b { display: block; font-size: 1.1rem; margin-bottom: 6px; }
.steps p { margin: 0; color: var(--ink-soft); }
.apps { margin: 36px 0 0; color: var(--ink-soft); max-width: 70ch; }
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; gap: 26px; } }

/* faq */
.faq { max-width: 780px; }
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer; list-style: none; padding: 20px 40px 20px 0; position: relative;
  font-weight: 650; font-size: 1.1rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 6px; top: 50%; width: 12px; height: 12px; margin-top: -8px;
  border-right: 2px solid var(--ink); border-bottom: 2px solid var(--ink); transform: rotate(45deg);
  transition: transform .2s ease;
}
.faq details[open] summary::after { transform: rotate(225deg); margin-top: -2px; }
.faq details p { margin: 0 0 20px; color: var(--ink-soft); max-width: 66ch; }

/* closing band */
.closing { background: var(--ink); color: var(--on-ink); border-radius: 18px; padding: 48px; display: flex; gap: 32px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.closing h2 { margin: 0 0 8px; }
.closing p { margin: 0; opacity: .8; max-width: 46ch; }
.closing .btn { background: var(--on-ink); color: var(--ink); }
section.end { border-top: 0; padding-top: 24px; }
@media (max-width: 560px) { .closing { padding: 32px 22px; } .closing .btn { width: 100%; } }

/* footer */
footer { padding: 40px 0 56px; color: var(--ink-soft); font-size: .95rem; }
footer .wrap { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
footer h4 { margin: 0 0 10px; color: var(--ink); font-size: 1rem; }
footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
footer .copy { grid-column: 1 / -1; margin: 12px 0 0; font-size: .85rem; }
@media (max-width: 760px) { footer .wrap { grid-template-columns: 1fr; } }

/* legal pages */
.doc { padding: 24px 0 72px; }
.doc article { max-width: 74ch; }
.doc h1 { font: 700 clamp(1.7rem, 4vw, 2.4rem)/1.15 var(--display); letter-spacing: -.03em; margin: 0 0 12px; }
.doc h2 { font-size: 1.3rem; margin: 40px 0 12px; }
.doc p, .doc li { color: var(--ink); }
.doc ul { padding-left: 1.2em; }
.doc li { margin: 4px 0; }
.doc table { border-collapse: collapse; width: 100%; margin: 16px 0; font-size: .95rem; font-variant-numeric: tabular-nums; }
.doc th, .doc td { text-align: left; padding: 9px 10px 9px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.doc .table { overflow-x: auto; }
.back { display: inline-block; margin-bottom: 28px; color: var(--ink-soft); }