/* Общие стили для всех страниц: шрифты, переменные, базовая типографика,
   шапка, подвал, CTA-полоса, теги. Подключается первым. */

@font-face {
  font-family: 'PT Sans Narrow';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(../assets/fonts/pt-sans-narrow-latin-400.woff2) format('woff2');
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}

@font-face {
  font-family: 'PT Sans Narrow';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(../assets/fonts/pt-sans-narrow-cyrillic-400.woff2) format('woff2');
  unicode-range: U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;
}

@font-face {
  font-family: 'PT Sans Narrow';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(../assets/fonts/pt-sans-narrow-latin-700.woff2) format('woff2');
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}

@font-face {
  font-family: 'PT Sans Narrow';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(../assets/fonts/pt-sans-narrow-cyrillic-700.woff2) format('woff2');
  unicode-range: U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;
}

@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(../assets/fonts/ibm-plex-sans-latin-400.woff2) format('woff2');
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}

@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(../assets/fonts/ibm-plex-sans-cyrillic-400.woff2) format('woff2');
  unicode-range: U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;
}

@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(../assets/fonts/ibm-plex-sans-latin-600.woff2) format('woff2');
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}

@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(../assets/fonts/ibm-plex-sans-cyrillic-600.woff2) format('woff2');
  unicode-range: U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;
}

@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(../assets/fonts/ibm-plex-sans-latin-700.woff2) format('woff2');
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}

@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(../assets/fonts/ibm-plex-sans-cyrillic-700.woff2) format('woff2');
  unicode-range: U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;
}

@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(../assets/fonts/jetbrains-mono-latin-400.woff2) format('woff2');
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}

@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(../assets/fonts/jetbrains-mono-cyrillic-400.woff2) format('woff2');
  unicode-range: U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;
}

@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(../assets/fonts/jetbrains-mono-latin-700.woff2) format('woff2');
  unicode-range: U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}

@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(../assets/fonts/jetbrains-mono-cyrillic-700.woff2) format('woff2');
  unicode-range: U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116;
}

:root {
  color-scheme: light;
  --paper: #F1F2F4;
  --card: #FFFFFF;
  --wash: #F5F6F8;
  --ink: #14161A;
  --ink-2: #3C424B;
  --muted: #5B626C;
  --dim: #8A919B;
  --line: #DCDFE4;
  --line-2: #C6CAD1;
  --acc: #FEA600;
  --acc-ink: #7A4E00;
  --acc-wash: #FFF3DC;
  --alarm: #C6382E;
  --ok: #2C7A62;
  --fd: "PT Sans Narrow","Arial Narrow",Arial,sans-serif;
  --fb: "IBM Plex Sans","Helvetica Neue",Arial,sans-serif;
  --fm: "JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --wrap: 1290px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--fb);
  font-size: 17.5px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

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

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 36px;
}

@media(max-width:760px) {
  .wrap {
    padding: 0 18px;
  }
}

h1, h2, h3 {
  font-family: var(--fd);
  font-weight: 700;
  text-transform: uppercase;
  margin: 0;
  line-height: 1.02;
  text-wrap: balance;
  letter-spacing: .004em;
  overflow-wrap: normal;
  word-break: keep-all;
  hyphens: none;
}

h4 {
  font-family: var(--fb);
  font-weight: 700;
  margin: 0;
  line-height: 1.3;
}

.lead {
  font-size: 21px;
  color: var(--muted);
  max-width: 62ch;
  line-height: 1.55;
}

/* ---------- шапка ---------- */
header.site {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(241,242,244,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-2);
}

header.site .wrap {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 80px;
}

.logoLink {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.logoSvg {
  display: block;
  height: 46px;
  width: auto;
}

@media(max-width:560px) {
  .logoSvg {
    height: 36px;
  }
  header.site .wrap {
    height: 64px;
    gap: 16px;
  }
}

nav.main {
  display: flex;
  gap: 28px;
  margin-left: auto;
  font-family: var(--fd);
  font-size: 21px;
  text-transform: uppercase;
  letter-spacing: .04em;
  font-weight: 600;
  color: var(--ink-2);
}

nav.main a {
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}

nav.main a:hover {
  color: var(--ink);
  border-bottom-color: var(--acc);
}

.mailto {
  font-family: var(--fm);
  font-size: 13.5px;
  background: var(--ink);
  color: #fff;
  text-decoration: none;
  padding: 12px 16px;
  flex-shrink: 0;
  white-space: nowrap;
  border-radius: .3em;
}

.mailto:hover {
  background: var(--acc);
  color: #1A1204;
}

/* Мобильное меню: кнопка видна только на узких экранах */
.navToggle {
  display: none;
}

@media(max-width:1000px) {
  .mailto {
    margin-left: auto;
  }

  .navToggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 44px;
    height: 44px;
    padding: 0 0 0 18px;
    flex-shrink: 0;
    background: transparent;
    border: 0;
    border-radius: 0;
    cursor: pointer;
  }

  .navToggle span {
    display: block;
    height: 2px;
    background: var(--ink);
    transition: transform .2s, opacity .2s;
  }

  .navToggle:focus-visible {
    outline: 2px solid var(--acc);
    outline-offset: 3px;
  }

  header.site.nav-open .navToggle span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  header.site.nav-open .navToggle span:nth-child(2) {
    opacity: 0;
  }

  header.site.nav-open .navToggle span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  /* Тот же nav.main, что и на десктопе, раскрывается панелью под шапкой */
  nav.main {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    margin: 0;
    padding: 0 36px 8px;
    background: var(--paper);
    border-bottom: 1px solid var(--line-2);
    box-shadow: 0 12px 24px rgba(20,22,26,.08);
  }

  header.site.nav-open nav.main {
    display: flex;
  }

  nav.main a {
    padding: 14px 0;
    border-bottom: 0;
    border-top: 1px solid var(--line);
  }

  nav.main a:first-child {
    border-top: 0;
  }

  nav.main a:hover {
    color: var(--acc-ink);
  }
}

@media(max-width:760px) {
  nav.main {
    padding: 0 18px 8px;
  }
}

/* Узкий телефон: логотип, почта и кнопка меню должны уместиться в одну строку даже на 320px */
@media(max-width:400px) {
  header.site .wrap {
    gap: 12px;
  }

  .mailto {
    font-size: 11.5px;
    padding: 10px 12px;
  }

  .navToggle {
    width: 36px;
    padding-left: 10px;
  }
}

.ruler {
  height: 12px;
  background-image: repeating-linear-gradient(to right,var(--line-2) 0 1px,transparent 1px 22px);
  border-bottom: 1px solid var(--line-2);
}

/* ---------- секции ---------- */
section {
  padding: 74px 0;
}

.headRule {
  border-top: 2px solid var(--ink);
  padding-top: 16px;
  display: flex;
  gap: 20px;
  align-items: baseline;
  flex-wrap: wrap;
}

.headRule h2 {
  font-size: clamp(32px,4.4vw,56px);
}

.headRule h3 {
  font-size: clamp(24px,2.8vw,34px);
}

.tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.badge {
  font-family: var(--fm);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 4px 8px;
  line-height: 1.55;
  display: inline-block;
}

.badge.nda {
  background: var(--acc-wash);
  color: var(--acc-ink);
}

.badge.open {
  background: #E3F1EC;
  color: var(--ok);
}

.badge.dom {
  background: #EDEFF2;
  color: var(--muted);
}

/* ---------- полоса CTA ---------- */
.band {
  background: var(--acc);
  padding: 64px 0;
}

.band h2 {
  font-size: clamp(30px,4.2vw,52px);
  max-width: 19ch;
  color: #1A1204;
}

.band .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 36px;
  flex-wrap: wrap;
}

.band a {
  background: #1A1204;
  color: #fff;
  text-decoration: none;
  font-family: var(--fm);
  font-size: 15px;
  padding: 18px 27px;
}

.band a:hover {
  background: #fff;
  color: #1A1204;
}

footer.site {
  padding: 38px 0;
  font-size: 15px;
  color: var(--muted);
  border-top: 1px solid var(--line-2);
}

footer.site .wrap {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  align-items: center;
}

figure {
  margin: 0;
}

figcaption {
  font-size: 15px;
  color: var(--muted);
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  line-height: 1.55;
}

figcaption b {
  color: var(--ink);
  font-weight: 600;
}

.figBlock>figure, .next a, .grid .c, .proc>div, .chall>div {
  min-width: 0;
}

.view {
  display: none;
}

.view.on {
  display: block;
}

@media(prefers-reduced-motion:reduce) {
  * {
    transition: none!important;
    scroll-behavior: auto;
  }
}

@media print {
  header.site {
    position: static;
  }
}