/* advkzn.ru — Plex Sans for reading, Plex Condensed for headings. */
@font-face {
  font-family: "IBM Plex Sans";
  src: url("/assets/fonts/ibm-plex-sans-regular.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Sans";
  src: url("/assets/fonts/ibm-plex-sans-medium.woff2") format("woff2");
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Sans Condensed";
  src: url("/assets/fonts/ibm-plex-sans-condensed-medium.woff2") format("woff2");
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

:root {
  --ink: #202020;
  --paper: #fff;
  --muted: #626262;
  --sand: #d4a017;
  --sand-ink: #865a00;
  --sand-soft: #faf7ee;
  --link: #1741c8;
  --link-hover: #12349d;
  --rule: #e2ddd4;
  --control-rule: #8a8a8a;
  --sans: "IBM Plex Sans", "Segoe UI", Arial, sans-serif;
  --heading: "IBM Plex Sans Condensed", "IBM Plex Sans", Arial, sans-serif;

  --text-s: 14px;
  --text-m: 17px;
  --text-xl: 28px;
  --text-2xl: 48px;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --section-space: 80px;
  --label-width: 224px;
  --column-gap: 64px;
  --read-width: 64ch;
  --list-indent: 32px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  font-size: var(--text-m);
  font-weight: 400;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, b, strong { font-weight: 500; }
h1, h2 { font-family: var(--heading); }
h1 { font-size: var(--text-2xl); line-height: 1.1; letter-spacing: -.015em; }
h2 { font-size: var(--text-xl); line-height: 1.2; letter-spacing: -.01em; }
h3 { font-size: var(--text-m); line-height: 1.6; }
::selection { background: #f0dfae; color: var(--ink); }

a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: .2em;
  text-decoration-thickness: 1px;
}
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--link); outline-offset: 4px; }
img, canvas { max-width: 100%; }

.container {
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: var(--space-2);
  left: var(--space-2);
  padding: var(--space-1) var(--space-2);
  transform: translateY(-180%);
  color: var(--paper);
  background: var(--ink);
}
.skip-link:focus { transform: none; }

/* Header and controls */
.header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding-block: var(--space-4) var(--space-3);
}
.header__id { min-width: 0; margin-right: auto; }
.header__name {
  color: var(--ink);
  font-size: var(--text-m);
  font-weight: 500;
  letter-spacing: -.01em;
  text-decoration: none;
  white-space: nowrap;
}
.header__role { color: var(--muted); font-size: var(--text-s); }
.header__nav { display: flex; gap: var(--space-3); }
.header__nav a, .lang-btn {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}
.header__nav a[aria-current="page"], .lang-btn.active {
  color: var(--link);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: .3em;
}
.header__nav a:hover, .lang-btn:hover, .header__name:hover {
  text-decoration: underline;
  text-decoration-thickness: 1px;
}
.header__lang { display: flex; align-items: center; gap: var(--space-1); white-space: nowrap; }
.lang-btn { font-size: var(--text-s); color: var(--muted); }
.lang-btn.active { color: var(--link); }
.lang-sep { color: var(--muted); font-size: var(--text-s); }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: var(--space-1) var(--space-2);
  border: 1px solid var(--ink);
  border-radius: 0;
  font: inherit;
  font-weight: 500;
  line-height: 1.4;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}
.button:hover { text-decoration: none; }
.button--primary { color: var(--paper); background: var(--link); border-color: var(--link); }
.button--primary:hover { background: var(--link-hover); border-color: var(--link-hover); }
.button--secondary { color: var(--link); background: var(--paper); border-color: var(--link); }
.button--secondary:hover { background: var(--sand-soft); }

/* The hero retains its asymmetric composition. */
.hero {
  display: grid;
  grid-template-columns: minmax(260px, min(32vw, 420px)) minmax(0, 1fr);
  gap: var(--space-6);
  align-items: start;
  padding-top: var(--space-5);
}
.hero__text { grid-column: 2; grid-row: 1; max-width: var(--read-width); padding-top: var(--space-3); }
.hero__eyebrow, .page-intro__label {
  margin-bottom: var(--space-3);
  color: var(--sand-ink);
  font-size: var(--text-s);
}
.hero__title { max-width: 22ch; margin-bottom: var(--space-3); }
.hero__text p { margin-bottom: var(--space-3); }
.hero__lede, .page-intro__lede, .section__lede, .service-detail__lede {
  max-width: var(--read-width);
  font-size: var(--text-m);
  line-height: 1.6;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-4); }
.hero__portrait {
  position: relative;
  grid-column: 1;
  grid-row: 1;
  aspect-ratio: 2 / 3;
  isolation: isolate;
}
.hero__portrait picture, .hero__statue { display: block; width: 100%; height: 100%; }
.hero__statue, .hero__relief {
  object-fit: contain;
  filter: grayscale(1) contrast(.64) brightness(1.28);
  opacity: .9;
  mix-blend-mode: multiply;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, #000 78%, transparent 99%);
  mask-image: linear-gradient(to bottom, #000 0%, #000 78%, transparent 99%);
}
.hero__relief {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  opacity: 0;
  pointer-events: none;
}
.hero__portrait--interactive .hero__relief { opacity: .9; }
.hero__portrait--interactive picture { opacity: 0; }

/* Shared grid: one label column and one reading-column start. */
.section, .page-intro, .service-toc, .service-detail, .service-group-heading {
  display: grid;
  grid-template-columns: var(--label-width) minmax(0, 1fr);
  column-gap: var(--column-gap);
}
.section {
  margin-top: var(--section-space);
  padding-top: var(--space-4);
  border-top: 1px solid var(--rule);
}
.section__label, .service-detail__label {
  position: sticky;
  top: var(--space-4);
  align-self: start;
}
.section__desc {
  max-width: 26ch;
  margin-top: var(--space-1);
  color: var(--muted);
  font-size: var(--text-s);
  line-height: 1.5;
}
.section__body { min-width: 0; }
.section__title { color: var(--sand-ink); }
.section__lede { margin-bottom: var(--space-4); }
.section__more { margin-top: var(--space-3); }

/* Home service index */
.services { max-width: var(--read-width); list-style: none; }
.services:not(.services--links) li { position: relative; padding: var(--space-1) 0 var(--space-1) var(--list-indent); }
.services:not(.services--links) li::before {
  content: "";
  position: absolute;
  top: 20px;
  left: 0;
  width: 4px;
  height: 4px;
  background: var(--sand);
}
.services--links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: var(--space-4); max-width: none; }
.services--links li { position: relative; min-width: 0; padding: var(--space-2) 0 var(--space-2) var(--list-indent); border-top: 1px solid var(--rule); }
.services--links li::before {
  content: attr(data-number);
  position: absolute;
  top: var(--space-2);
  left: 0;
  color: var(--sand-ink);
  font-size: var(--text-s);
  font-variant-numeric: tabular-nums;
}
.services--links a { color: var(--link); font-weight: 500; text-decoration: none; }
.services--links a:hover, .services--links a:focus-visible { text-decoration: underline; text-decoration-thickness: 1px; }
.services--links span { display: block; margin-top: var(--space-1); color: var(--muted); font-size: var(--text-s); line-height: 1.5; }
.services-group + .services-group { margin-top: var(--space-5); }
.services-group__title { margin-bottom: var(--space-2); }

/* Process: number beside the title, description directly below it. */
.steps { max-width: var(--read-width); list-style: none; counter-reset: steps; }
.steps li {
  display: grid;
  grid-template-columns: var(--space-3) minmax(0, 1fr);
  gap: var(--space-1);
  padding-block: var(--space-3);
  border-top: 1px solid var(--rule);
  counter-increment: steps;
}
.steps li::before {
  content: counter(steps, decimal-leading-zero);
  grid-column: 1;
  grid-row: 1;
  align-self: baseline;
  color: var(--sand-ink);
  font-size: var(--text-s);
  font-variant-numeric: tabular-nums;
}
.steps b { grid-column: 2; grid-row: 1; }
.steps span { grid-column: 2; grid-row: 2; color: var(--muted); }
.principles { max-width: var(--read-width); list-style: none; }
.principles--spaced { margin-top: var(--space-5); }
.principles li { position: relative; padding: var(--space-1) 0 var(--space-1) var(--list-indent); }
.principles li::before {
  content: "";
  position: absolute;
  top: 21px;
  left: 0;
  width: 12px;
  height: 1px;
  background: var(--sand);
}

/* Services page */
.page-intro { padding-block: var(--space-6) var(--space-5); }
.page-intro__label { align-self: start; margin: 0; }
.page-intro__body { min-width: 0; max-width: var(--read-width); }
.page-intro__title { margin-bottom: var(--space-3); }
.page-intro__lede { margin-bottom: var(--space-3); }
.page-intro__note { color: var(--muted); }
.service-toc { padding-block: var(--space-4); border-block: 1px solid var(--rule); background: var(--sand-soft); scroll-margin-top: var(--space-3); }
.service-toc__intro { align-self: start; }
.service-toc__title { margin-bottom: var(--space-2); color: var(--muted); font-size: var(--text-s); }
.service-toc__intro .button { max-width: 100%; }
.service-toc ol { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: var(--space-4); list-style: none; }
.service-toc li { position: relative; display: flex; min-width: 0; border-top: 1px solid var(--rule); }
.service-toc li::before {
  content: attr(data-number);
  position: absolute;
  top: 14px;
  left: 0;
  color: var(--sand-ink);
  font-size: var(--text-s);
  font-variant-numeric: tabular-nums;
}
.service-toc li a {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 48px;
  padding: 12px 0 12px var(--list-indent);
  color: var(--link);
  line-height: 1.5;
  text-decoration: none;
}
.service-toc li a:hover, .service-toc li a:focus-visible { text-decoration: underline; text-decoration-thickness: 1px; }
.service-group-heading { align-items: baseline; padding-block: var(--space-6) var(--space-3); }
.service-group-heading__eyebrow { color: var(--muted); font-size: var(--text-s); }
.service-group-heading h2 { max-width: var(--read-width); color: var(--sand-ink); }
.service-detail { padding-block: var(--space-5); border-top: 1px solid var(--rule); scroll-margin-top: var(--space-3); }
.service-detail:target { border-top-color: var(--sand-ink); }
.service-detail__label > span { display: block; margin-bottom: var(--space-1); color: var(--sand-ink); font-size: var(--text-s); font-variant-numeric: tabular-nums; }
.service-detail__label h2 { color: var(--sand-ink); }
.service-detail__back, .service-detail__partner { display: block; margin-top: var(--space-2); font-size: var(--text-s); line-height: 1.5; }
.service-detail__partner { color: var(--muted); }
.service-detail__body { min-width: 0; max-width: var(--read-width); }
.service-detail__body p + p, .service-detail__body ul + p, .service-detail__body ol + p { margin-top: var(--space-3); }
.service-detail__body h3 { margin-top: var(--space-4); }
.service-detail__body ul { margin-top: var(--space-3); list-style: none; }
.service-detail__body h3 + ul { margin-top: var(--space-2); }
.service-detail__body ul li { position: relative; padding: var(--space-1) 0 var(--space-1) var(--list-indent); }
.service-detail__body ul li::before {
  content: "";
  position: absolute;
  top: 20px;
  left: 0;
  width: 4px;
  height: 4px;
  background: var(--sand);
}
.service-process { margin-top: var(--space-3); list-style: none; counter-reset: service-process; }
.service-process li { position: relative; padding: var(--space-2) 0 var(--space-2) var(--list-indent); border-top: 1px solid var(--rule); counter-increment: service-process; }
.service-process li::before {
  content: counter(service-process, decimal-leading-zero);
  position: absolute;
  top: var(--space-2);
  left: 0;
  color: var(--sand-ink);
  font-size: var(--text-s);
  font-variant-numeric: tabular-nums;
}
.services-contact { margin-top: var(--space-4); }

/* Contacts and form */
.contacts { max-width: var(--read-width); list-style: none; }
.contacts li {
  display: grid;
  grid-template-columns: 96px minmax(200px, 1fr) minmax(0, 1fr);
  align-items: baseline;
  gap: 0 var(--space-2);
  padding-block: var(--space-2);
}
.contacts__label { color: var(--muted); font-size: var(--text-s); }
.contacts__note { color: var(--muted); font-size: var(--text-s); line-height: 1.5; }
.contacts__privacy { max-width: var(--read-width); margin-top: var(--space-3); color: var(--muted); font-size: var(--text-s); line-height: 1.5; }
.contact-form { display: grid; gap: var(--space-1); max-width: var(--read-width); margin-top: var(--space-4); }
.contact-form > input[type="hidden"], #contact-token { display: none; }
.contact-form__trap { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.contact-form > label:not(.contact-form__consent) { margin-top: var(--space-2); font-size: var(--text-s); }
.contact-form input:not([type="checkbox"]), .contact-form textarea {
  width: 100%;
  min-height: 48px;
  padding: 12px var(--space-2);
  border: 1px solid var(--control-rule);
  border-radius: 0;
  color: var(--ink);
  background: var(--paper);
  font: inherit;
  appearance: none;
  outline: none;
  box-shadow: none;
}
.contact-form input:not([type="checkbox"]):focus, .contact-form textarea:focus {
  border-color: var(--link);
  box-shadow: inset 0 0 0 1px var(--link);
}
.contact-form textarea { resize: vertical; }
.contact-form__consent { display: grid; grid-template-columns: 20px minmax(0, 1fr); gap: var(--space-1); margin-block: var(--space-2); font-size: var(--text-s); line-height: 1.5; }
.contact-form__consent input { width: 18px; height: 18px; margin-top: 2px; accent-color: var(--link); }
.contact-form .button { justify-self: start; }
.contact-form .button:disabled { cursor: not-allowed; opacity: .6; }
.contact-form__note { color: var(--muted); font-size: var(--text-s); line-height: 1.5; }
.contact-form__result:empty { display: none; }
.contact-feedback { margin-block: var(--space-1); padding-left: var(--space-2); border-left: 2px solid var(--sand-ink); font-size: var(--text-s); line-height: 1.5; }
.contact-feedback--success { border-color: var(--link); }
@media (forced-colors: active) {
  .contact-form input:not([type="checkbox"]):focus, .contact-form textarea:focus { outline: 2px solid Highlight; outline-offset: 2px; box-shadow: none; }
}

/* Policy uses the same reading-column start as other content. */
.policy { display: grid; grid-template-columns: var(--label-width) minmax(0, 1fr); column-gap: var(--column-gap); padding-top: var(--space-6); }
.policy__header, .policy section { grid-column: 2; min-width: 0; max-width: var(--read-width); }
.policy__header { margin-bottom: var(--space-5); }
.policy__eyebrow { margin-bottom: var(--space-2); color: var(--muted); font-size: var(--text-s); }
.policy__warning { margin-top: var(--space-3); padding-block: var(--space-2); border-block: 1px solid var(--rule); color: var(--muted); font-size: var(--text-s); line-height: 1.5; }
.policy section { padding-block: var(--space-3); border-top: 1px solid var(--rule); }
.policy h2 { margin-bottom: var(--space-2); color: var(--sand-ink); }
.policy p + p { margin-top: var(--space-3); }
.policy ul { padding-left: var(--space-3); }
.policy li + li { margin-top: var(--space-1); }

/* Footer follows the same two-column grid. */
.footer {
  display: grid;
  grid-template-columns: var(--label-width) minmax(0, 1fr);
  gap: var(--space-2) var(--column-gap);
  margin-top: var(--section-space);
  padding-block: var(--space-3) var(--space-5);
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: var(--text-s);
  line-height: 1.5;
}
.footer__copyright { grid-column: 1; grid-row: 1; }
.footer__nav { grid-column: 2; grid-row: 1; display: flex; flex-wrap: wrap; gap: var(--space-1) var(--space-3); align-items: baseline; }
.footer__nav a { color: var(--link); }
.footer__requisites { grid-column: 2; max-width: var(--read-width); }

/* Progressive reveal and static fallback for reduced motion. */
.reveal { opacity: 1; transform: none; }
.reveal.reveal--pending { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.reveal--pending.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal.reveal--pending { opacity: 1; transform: none; transition: none; }
  .hero__relief { display: none; }
  .hero__portrait--interactive picture { opacity: 1; }
}

/* Responsive changes preserve the same roles and spacing rhythm. */
@media (max-width: 1000px) {
  .hero { grid-template-columns: minmax(0, 1fr); gap: var(--space-4); padding-top: var(--space-4); }
  .hero__text { grid-column: 1; grid-row: 1; padding: 0; }
  .hero__portrait { grid-column: 1; grid-row: 2; width: 100%; max-width: 340px; justify-self: center; }
}

@media (max-width: 900px) {
  .header { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: var(--space-1) var(--space-3); }
  .header__lang { grid-column: 2; grid-row: 1; }
  .header__nav { grid-column: 1 / -1; grid-row: 2; }
  .section, .page-intro, .service-toc, .service-detail, .service-group-heading, .policy, .footer { grid-template-columns: minmax(0, 1fr); row-gap: var(--space-3); }
  .section__label, .service-detail__label { position: static; }
  .section__desc { max-width: var(--read-width); }
  .page-intro { row-gap: var(--space-2); }
  .service-group-heading { row-gap: var(--space-1); }
  .policy__header, .policy section, .footer__copyright, .footer__nav, .footer__requisites { grid-column: 1; grid-row: auto; }
  .footer { row-gap: var(--space-2); }
}

@media (max-width: 760px) {
  .services--links, .service-toc ol { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 640px) {
  :root {
    --text-m: 16px;
    --text-xl: 24px;
    --text-2xl: 32px;
    --section-space: 56px;
  }
  .container { padding-inline: var(--space-3); }
  .header { padding-block: var(--space-3) var(--space-2); }
  .header__nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 var(--space-2); padding-top: var(--space-1); border-top: 1px solid var(--rule); }
  .hero { padding-top: var(--space-3); }
  .hero__portrait { max-width: 280px; }
  .hero__actions { display: grid; }
  .hero__actions .button, .contact-form .button { width: 100%; }
  .section { padding-top: var(--space-3); }
  .page-intro { padding-block: var(--space-4); }
  .service-toc { padding-block: var(--space-3); }
  .service-detail { padding-block: var(--space-4); }
  .service-group-heading { padding-top: var(--space-5); }
  .services-contact { margin-top: var(--space-4); }
  .services-group + .services-group, .principles--spaced { margin-top: var(--space-4); }
  .contacts li { grid-template-columns: 80px minmax(0, 1fr); gap: 4px var(--space-2); padding-block: var(--space-2); }
  .contacts__label { grid-column: 1; grid-row: 1; }
  .contacts li > a { grid-column: 2; grid-row: 1; }
  .contacts__note { grid-column: 2; grid-row: 2; }
  .policy { padding-top: var(--space-4); row-gap: var(--space-2); }
  .policy__header { margin-bottom: var(--space-3); }
  .footer { padding-bottom: var(--space-4); }
}