@font-face {
  font-family: "Manrope Variable";
  font-style: normal;
  font-display: swap;
  font-weight: 200 800;
  src: url("/fonts/manrope-cyrillic-ext.woff2") format("woff2-variations");
  unicode-range: U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;
}

@font-face {
  font-family: "Manrope Variable";
  font-style: normal;
  font-display: swap;
  font-weight: 200 800;
  src: url("/fonts/manrope-cyrillic.woff2") format("woff2-variations");
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}

@font-face {
  font-family: "Manrope Variable";
  font-style: normal;
  font-display: swap;
  font-weight: 200 800;
  src: url("/fonts/manrope-latin-ext.woff2") format("woff2-variations");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: "Manrope Variable";
  font-style: normal;
  font-display: swap;
  font-weight: 200 800;
  src: url("/fonts/manrope-latin.woff2") format("woff2-variations");
  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+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  color-scheme: light;
  --paper: #f4efe4;
  --paper-deep: #ebe4d4;
  --ink: #1b2430;
  --muted: #5a6370;
  --accent: #1e7d77;
  --accent-hover: #165e59;
  --accent-soft: #d5eeec;
  --card: #fffdf8;
  --line: #d5ccb8;
  --gold: #a65a22;
  --gold-bg: #f3e4c8;
  --cr: #e05c16;
  --logo: #2a9a93;
  --logo-eyes: #1b2430;
  --header-bg: rgba(255, 253, 248, 0.92);
  --disclaimer-fg: #5c4716;
  --callout-bg: #e7f4f3;
  --callout-border: #b7d9d6;
  --example-bg: #fff8e8;
  --example-border: #e0c98a;
  --shadow: 0 10px 30px rgba(27, 36, 48, 0.08);
  --button-fg: #fff;
  --radius: 16px;
  --max: 1120px;
  --font: "Manrope Variable", "Segoe UI", Arial, sans-serif;
  --font-display: "Manrope Variable", "Segoe UI", Arial, sans-serif;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --paper: #12161c;
  --paper-deep: #1a2028;
  --ink: #e8eef3;
  --muted: #9aa4b0;
  --accent: #4ecdc4;
  --accent-hover: #7adcd5;
  --accent-soft: #1b3534;
  --card: #1c242e;
  --line: #2d3642;
  --gold: #e0a04a;
  --gold-bg: #3a2e18;
  --cr: #f07a2a;
  --logo: #3ec9be;
  --logo-eyes: #12161c;
  --header-bg: rgba(18, 22, 28, 0.92);
  --disclaimer-fg: #e8d5a3;
  --callout-bg: #173033;
  --callout-border: #2d5c5a;
  --example-bg: #2a2418;
  --example-border: #6a5428;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --button-fg: #12161c;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, color-mix(in srgb, var(--accent) 16%, transparent), transparent 28rem),
    var(--paper);
  font-family: var(--font);
  font-size: 1.125rem;
  line-height: 1.65;
}

img {
  max-width: 100%;
}

a {
  color: var(--accent);
  text-underline-offset: 0.16em;
}

a:hover {
  color: var(--accent-hover);
}

.skip-link {
  position: absolute;
  left: 0.75rem;
  top: -3rem;
  z-index: 20;
  padding: 0.5rem 0.8rem;
  background: var(--accent);
  color: var(--button-fg);
  border-radius: 8px;
}

.skip-link:focus {
  top: 0.75rem;
}

.site-header,
.site-footer {
  background: var(--header-bg);
  border-color: var(--line);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.header-inner,
.footer-inner,
.wrap {
  width: min(var(--max), calc(100% - 2rem));
  margin-inline: auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: inherit;
  text-decoration: none;
}

.crtech-logo {
  width: 2.15rem;
  height: 2.15rem;
  flex-shrink: 0;
  color: var(--logo);
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.01em;
}

.brand-note {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 400;
}

.wordmark {
  font-family: var(--font);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--muted);
}

.wordmark-cr {
  color: var(--cr);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: var(--ink);
  cursor: pointer;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.theme-toggle svg {
  width: 1.15rem;
  height: 1.15rem;
}

.theme-toggle .icon-sun {
  display: none;
}

html[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

html[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

.nav-links {
  display: flex;
  gap: 1.1rem;
}

.nav-links a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
}

.nav-links a[aria-current="page"],
.nav-links a:hover {
  color: var(--accent);
}

.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1.4rem 0 2rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer-inner p {
  margin: 0;
  max-width: 38rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: inherit;
  text-decoration: none;
}

.footer-brand .crtech-logo {
  width: 1.85rem;
  height: 1.85rem;
}

.footer-brand .wordmark {
  font-size: 1.15rem;
}

main {
  flex: 1;
  padding: 2rem 0 3.5rem;
}

.hero,
.panel,
.gost-card,
.term-card,
.article,
.pager a,
.callout,
.note,
.example,
.flow li {
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero,
.panel,
.gost-card,
.article {
  border-radius: var(--radius);
}

.hero {
  padding: clamp(1.5rem, 4vw, 2.8rem);
  margin-bottom: 1.5rem;
}

.eyebrow {
  margin: 0 0 0.6rem;
  color: var(--gold);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
}

h1 {
  margin: 0 0 0.8rem;
  font-size: clamp(1.85rem, 4vw, 2.7rem);
  font-weight: 800;
}

h2 {
  margin: 1.8rem 0 0.7rem;
  font-size: 1.4rem;
}

h3 {
  margin: 1.2rem 0 0.5rem;
}

.lede,
.muted {
  color: var(--muted);
}

.lede {
  max-width: 42rem;
  font-size: 1.2rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.1rem;
  border-radius: 999px;
  background: var(--accent);
  color: var(--button-fg);
  font-weight: 700;
  text-decoration: none;
}

.button:hover {
  background: var(--accent-hover);
  color: var(--button-fg);
}

.button-ghost {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.button-ghost:hover {
  background: var(--accent-soft);
  color: var(--accent-hover);
}

.grid {
  display: grid;
  gap: 1rem;
}

.home-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.panel,
.gost-card {
  padding: 1.2rem 1.3rem 1.35rem;
}

.panel h2,
.gost-card h2 {
  margin-top: 0;
}

.gost-card h2 {
  font-size: 1.25rem;
}

.code {
  display: inline-block;
  margin-bottom: 0.4rem;
  color: var(--accent);
  font-weight: 700;
}

.status {
  display: inline-block;
  margin-top: 0.8rem;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
}

.disclaimer {
  margin: 0 0 1rem;
  padding: 0.85rem 1rem;
  border-left: 4px solid var(--gold);
  background: var(--gold-bg);
  border-radius: 0 12px 12px 0;
  color: var(--disclaimer-fg);
  font-size: 0.98rem;
}

.layout {
  display: grid;
  grid-template-columns: 16.5rem minmax(0, 1fr);
  gap: 1.4rem;
  align-items: start;
}

.side-wrap {
  position: sticky;
  top: 5rem;
}

.nav-toggle {
  display: none;
  width: 100%;
  margin-bottom: 0.8rem;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
  color: var(--ink);
  font: inherit;
  font-weight: 700;
}

.toc {
  margin: 0;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
}

.toc h2 {
  margin: 0 0 0.7rem;
  font-size: 0.95rem;
}

.toc ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.toc a {
  display: block;
  padding: 0.35rem 0.45rem;
  border-radius: 8px;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.95rem;
}

.toc a:hover,
.toc a[aria-current="page"] {
  background: var(--accent-soft);
  color: var(--accent);
}

.article {
  padding: clamp(1.2rem, 3vw, 2rem);
}

.article p,
.article li {
  max-width: 42rem;
}

.article ul,
.article ol {
  padding-left: 1.2rem;
}

.article li + li {
  margin-top: 0.35rem;
}

.crumbs {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.crumbs a {
  color: inherit;
  text-decoration: none;
}

.crumbs a:hover {
  color: var(--accent);
}

.callout,
.note,
.example {
  margin: 1.2rem 0;
  padding: 1rem 1.1rem;
  border-radius: 14px;
}

.callout {
  border-color: var(--callout-border);
  background: var(--callout-bg);
}

.note {
  background: var(--paper-deep);
}

.example {
  border-color: var(--example-border);
  background: var(--example-bg);
}

.callout h3,
.note h3,
.example h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}

.flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.7rem;
  margin: 1.2rem 0 0;
  padding: 0;
  list-style: none;
}

.flow li {
  position: relative;
  padding: 0.9rem 0.9rem 1rem;
  border-radius: 14px;
  font-weight: 700;
  font-size: 0.98rem;
}

.flow li span {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--accent);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.terms {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 0.85rem;
  margin-top: 1rem;
}

.term-card {
  padding: 1rem 1.05rem;
  border-radius: 14px;
}

.term-card h3 {
  margin: 0 0 0.4rem;
  color: var(--accent);
  font-size: 1.05rem;
}

.term-card p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
}

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
  margin-top: 1.3rem;
}

.pager a {
  display: block;
  padding: 0.9rem 1rem;
  border-radius: 14px;
  color: inherit;
  text-decoration: none;
}

.pager a:hover {
  border-color: var(--accent);
}

.pager .dir {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.pager .next {
  text-align: right;
}

.pager .empty {
  visibility: hidden;
}

.catalog-list {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

@media (max-width: 860px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .side-wrap {
    position: static;
  }

  .nav-toggle {
    display: block;
  }

  .toc {
    display: none;
  }

  .toc.is-open {
    display: block;
  }

  .flow {
    grid-template-columns: 1fr 1fr;
  }

  .pager {
    grid-template-columns: 1fr;
  }

  .pager .next {
    text-align: left;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 1.05rem;
  }

  .header-inner {
    flex-wrap: wrap;
    min-height: unset;
    padding: 0.7rem 0;
  }

  .header-actions {
    margin-left: auto;
  }

  .nav-links {
    gap: 0.7rem;
    font-size: 0.95rem;
  }

  .nav-gost {
    display: none;
  }

  .flow {
    grid-template-columns: 1fr;
  }

  .header-inner,
  .footer-inner,
  .wrap {
    width: min(var(--max), calc(100% - 1.25rem));
  }
}