@import url('https://fonts.googleapis.com/css2?family=Fira+Sans+Extra+Condensed:wght@600;700;800&family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  --bg: #F4F5F8;
  --surface: #FFFFFF;
  --ink: #0B0C0E;
  --muted: #56606E;
  --line: #D6DAE1;
  --line-strong: #0B0C0E;
  --accent: #2A6BD6;
  --on-accent: #FFFFFF;
  --head: 'Fira Sans Extra Condensed', 'Arial Narrow', 'Roboto Condensed', 'DejaVu Sans Condensed', sans-serif;
  --body: 'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0B0C0E; --surface: #14161A; --ink: #EEF1F5; --muted: #9AA3B0;
    --line: #262A31; --line-strong: #EEF1F5; --accent: #A3CBFF; --on-accent: #0B0C0E;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0B0C0E; --surface: #14161A; --ink: #EEF1F5; --muted: #9AA3B0;
  --line: #262A31; --line-strong: #EEF1F5; --accent: #A3CBFF; --on-accent: #0B0C0E;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 400 1.0625rem/1.6 var(--body);
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
.wrap { width: 100%; max-width: 1180px; margin-inline: auto; padding-inline: 16px; }
@media (min-width: 720px) { .wrap { padding-inline: 32px; } }

h1, h2, h3 { font-family: var(--head); font-weight: 800; text-transform: uppercase; line-height: 1; margin: 0; letter-spacing: .005em; }
h1 { font-size: clamp(2.6rem, 9vw, 5.6rem); }
h2 { font-size: clamp(1.9rem, 5vw, 3rem); margin-bottom: 28px; }
h2.gap { margin-top: 56px; }
h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 10px; }
p { margin: 0 0 1em; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 52ch; margin-top: 24px; }
.eyebrow {
  display: flex; align-items: center; gap: 10px; margin: 0 0 18px;
  font: 500 .8rem/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--muted);
}
.eyebrow::before { content: ""; width: 10px; height: 10px; background: var(--accent); flex: none; }

/* тёмные блоки — всегда чёрные */
.on-dark {
  --bg: #0B0C0E; --surface: #14161A; --ink: #EEF1F5; --muted: #A6AEBA;
  --line: #262A31; --line-strong: #EEF1F5; --accent: #A3CBFF; --on-accent: #0B0C0E;
  background: var(--bg); color: var(--ink);
}

/* кнопки */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .6em;
  min-height: 52px; padding: 0 1.4em; border: 2px solid transparent; border-radius: 2px;
  font: 600 1rem/1 var(--body); text-decoration: none; cursor: pointer; text-align: center;
  transition: background .15s, color .15s, border-color .15s;
}
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-ghost:hover { background: var(--ink); color: var(--bg); }
.btn-sm { min-height: 44px; padding: 0 1em; font-size: .95rem; }
.btns { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

/* шапка */
.site-header { position: sticky; top: 0; z-index: 50; background: var(--bg); border-bottom: 1px solid var(--line); }
.bar { display: flex; align-items: center; gap: 8px; min-height: 68px; }
.logo { display: block; height: 38px; text-decoration: none; margin-right: auto; }
.logo svg { height: 100%; width: auto; }
.nav { display: none; }
.nav a { text-decoration: none; font-weight: 500; padding: 10px 14px; border-bottom: 2px solid transparent; }
.nav a:hover { border-bottom-color: var(--line-strong); }
.nav a[aria-current="page"] { border-bottom-color: var(--accent); color: var(--ink); }
.menu-btn { width: 44px; height: 44px; border: 2px solid var(--ink); background: transparent; border-radius: 2px; display: inline-flex; flex-direction: column; gap: 5px; align-items: center; justify-content: center; cursor: pointer; padding: 0; }
.menu-btn span { width: 20px; height: 2px; background: var(--ink); }
.nav.open { display: flex; flex-direction: column; position: absolute; left: 0; right: 0; top: 100%; background: var(--bg); border-bottom: 1px solid var(--line); padding: 8px 16px 16px; }
.nav.open a { padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 1.1rem; }
@media (min-width: 900px) {
  .nav { display: flex; gap: 4px; margin-right: 16px; }
  .menu-btn { display: none; }
  .logo { height: 44px; }
  .btn-sm { min-height: 48px; padding: 0 1.3em; }
}

/* герой */
.hero { border-bottom: 1px solid var(--line); overflow: hidden; }
.hero-grid { display: grid; gap: 32px; padding-block: 48px 40px; align-items: center; }
.hero h1 { color: var(--ink); }
.hero .lead { color: var(--muted); }
.hero-art { max-width: 560px; width: 100%; justify-self: center; border: 1px solid var(--line); background: #000; }
.hero-svg { width: 100%; height: auto; }
@media (min-width: 900px) {
  .hero-grid { grid-template-columns: 1.1fr .9fr; gap: 48px; padding-block: 96px; }
  .hero-art { justify-self: end; }
}

/* блоки */
.block { padding-block: 56px; }
.block.alt { background: var(--surface); border-block: 1px solid var(--line); }
@media (min-width: 900px) { .block { padding-block: 88px; } }
.pagehead { padding-block: 48px 40px; border-bottom: 1px solid var(--line); background: var(--surface); }
@media (min-width: 900px) { .pagehead { padding-block: 80px 64px; } }
.pagehead h1 { font-size: clamp(2.4rem, 7vw, 4.6rem); }

.tiles { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.tile { background: var(--surface); padding: 28px 24px; }
.block.alt .tile { background: var(--bg); }
.tile p { margin: 0; color: var(--muted); }
@media (min-width: 800px) { .t3 { grid-template-columns: repeat(3, 1fr); } .t2 { grid-template-columns: repeat(2, 1fr); } .tile { padding: 36px 32px; } }
.more { margin: 28px 0 0; }
.link { display: inline-flex; align-items: center; gap: .5em; font-weight: 600; color: var(--ink); text-decoration: none; border-bottom: 2px solid var(--accent); padding-bottom: 2px; }
.link:hover { border-bottom-color: var(--ink); }

/* порядок работы — реальная последовательность, поэтому нумерация */
.steps { list-style: none; padding: 0; margin: 0; display: grid; border-top: 2px solid var(--ink); }
.steps li { padding: 24px 0 26px; border-bottom: 1px solid var(--line); }
.steps p { margin: 0; color: var(--muted); }
.num { display: block; font: 500 1rem/1 var(--mono); color: var(--accent); margin-bottom: 14px; letter-spacing: .08em; }
@media (min-width: 900px) {
  .steps { grid-template-columns: repeat(4, 1fr); }
  .steps li { border-bottom: 0; border-right: 1px solid var(--line); padding: 28px 28px 8px 28px; }
  .steps li:first-child { padding-left: 0; }
  .steps li:last-child { border-right: 0; }
}

.cta { border-top: 1px solid var(--line); }
.cta-in { display: grid; gap: 8px; padding-block: 56px; align-items: center; }
.cta h2 { margin: 0; max-width: 18ch; }
@media (min-width: 900px) { .cta-in { grid-template-columns: 1.2fr 1fr; padding-block: 88px; gap: 48px; } .cta .btns { justify-content: flex-end; margin-top: 0; } }
.cta .btns { margin-top: 24px; }

/* две колонки */
.two { display: grid; gap: 32px; }
@media (min-width: 900px) { .two { grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; } }
.panel { background: var(--surface); border: 1px solid var(--line); border-top: 4px solid var(--accent); padding: 28px 24px 12px; }
.panel h2 { margin-bottom: 20px; }
.ticks { list-style: none; margin: 0; padding: 0; }
.ticks li { position: relative; padding: 14px 0 14px 28px; border-top: 1px solid var(--line); }
.ticks li::before { content: ""; position: absolute; left: 0; top: 1.35em; width: 12px; height: 12px; background: var(--accent); }
.ticks.big li { font-size: 1.15rem; }
.ticks.big { border-bottom: 1px solid var(--line); }

/* факты */
.facts { margin: 0; border-top: 2px solid var(--ink); }
.facts > div { display: grid; gap: 4px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.facts dt { font: 500 .78rem/1.2 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.facts dd { margin: 0; font-weight: 500; }
@media (min-width: 600px) { .facts > div { grid-template-columns: 190px 1fr; gap: 24px; } }

/* реквизиты */
.req { margin: 0; border-top: 2px solid var(--ink); }
.req-row { display: grid; grid-template-columns: 1fr auto; gap: 6px 16px; padding: 14px 0; border-bottom: 1px solid var(--line); align-items: center; }
.req-row dt { grid-column: 1 / -1; font: 500 .78rem/1.2 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.req-row dd { margin: 0; font: 500 1rem/1.4 var(--mono); overflow-wrap: anywhere; }
.copy { font: 500 .85rem/1 var(--body); padding: 10px 14px; min-height: 40px; background: transparent; color: var(--ink); border: 1px solid var(--line-strong); border-radius: 2px; cursor: pointer; }
.copy:hover { background: var(--ink); color: var(--bg); }
.copy.done { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }
@media (min-width: 800px) {
  .req-row { grid-template-columns: 260px 1fr auto; gap: 24px; padding: 16px 0; }
  .req-row dt { grid-column: auto; }
}

/* контакты */
.contact .ico { display: inline-flex; width: 44px; height: 44px; align-items: center; justify-content: center; background: var(--ink); color: var(--bg); margin-bottom: 20px; }
.contact p { color: var(--ink); }
.biglink { font: 600 1.25rem/1.3 var(--mono); text-decoration: none; border-bottom: 2px solid var(--accent); overflow-wrap: anywhere; }
.biglink:hover { border-bottom-color: var(--ink); }
.tile .more { margin-top: 20px; }
.msgs { display: flex; flex-wrap: wrap; gap: 10px; }
.msgs .btn { min-height: 46px; }
.foot-contacts .msgline { color: var(--ink); font-size: 1rem; }
.foot-contacts .msgline a:hover { color: var(--accent); }

/* подвал */
.site-footer { border-top: 1px solid var(--line); }
.foot { display: grid; gap: 32px; padding-block: 48px 32px; }
.foot .logo { height: 44px; margin: 0 0 12px; }
.foot-brand p { margin: 0; color: var(--muted); }
.foot-nav, .foot-contacts { display: flex; flex-direction: column; gap: 10px; }
.foot-nav a, .foot-contacts a { text-decoration: none; }
.foot-nav a:hover, .foot-contacts a:hover { color: var(--accent); }
.foot-contacts span { color: var(--muted); font-size: .95rem; max-width: 34ch; }
.legal { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; padding-block: 20px 28px; border-top: 1px solid var(--line); font: 400 .8rem/1.4 var(--mono); color: var(--muted); }
@media (min-width: 900px) { .foot { grid-template-columns: 1.2fr .8fr 1.2fr; gap: 48px; } }

/* одностраничная версия: страницы переключаются по адресу #/раздел */
.page { display: none; }
.page.on { display: block; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }