/* Inter variable (OFL — см. static/fonts/Inter-LICENSE.txt) */
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("../fonts/InterVariable.woff2") format("woff2");
}

:root {
  color-scheme: dark;
  --bg: #0f1115;
  --card: #171a21;
  --text: #e6e6e6;
  --muted: #9aa3b2;
  --accent: #3b82f6;
  /* Типографика */
  --line-height-prose: 1.68;
  --prose-max-width: min(48rem, 72ch);
  /* Карточка */
  --card-radius: 14px;
  --card-shadow:
    0 2px 4px color-mix(in srgb, #000 35%, transparent),
    0 8px 20px color-mix(in srgb, #000 28%, transparent);
  --card-shadow-hover:
    0 4px 8px color-mix(in srgb, #000 32%, transparent),
    0 16px 36px color-mix(in srgb, #000 42%, transparent);
  /* Анимации и переходы */
  --ease-out-soft: cubic-bezier(0.33, 1, 0.68, 1);
  --transition-fast: 0.2s var(--ease-out-soft);
  --transition: 0.25s var(--ease-out-soft);
  --transition-slow: 0.3s var(--ease-out-soft);
  /* Sticky-сайдбар: ниже липкой шапки (primary + ряд марок), иначе перекрывается */
  --site-sticky-sidebar-top: max(1rem, calc(6.85rem + env(safe-area-inset-top, 0px)));
}

html.header--compact {
  --site-sticky-sidebar-top: max(0.85rem, calc(3.7rem + env(safe-area-inset-top, 0px)));
}

@media (max-width: 767px) {
  html {
    --site-sticky-sidebar-top: max(0.5rem, calc(4.35rem + env(safe-area-inset-top, 0px)));
  }
  html.header--compact {
    --site-sticky-sidebar-top: max(0.45rem, calc(3.95rem + env(safe-area-inset-top, 0px)));
  }
}

/* Skeleton (загрузка страницы) */
@keyframes skeleton-pulse {
  0%,
  100% {
    opacity: 0.42;
  }
  50% {
    opacity: 0.95;
  }
}

html.skeleton-lock {
  overflow: hidden;
}

.page-skeleton {
  position: fixed;
  inset: 0;
  /* Выше липкой шапки (.site-header z-index 25000), иначе прозрачная шапка в boot перекрывает скелетон и даёт «белый экран» */
  z-index: 28000;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: clamp(4.25rem, 14vh, 6.5rem) 1.25rem 2rem;
  background: var(--bg);
  transition:
    opacity var(--transition-slow) var(--ease-out-soft),
    visibility 0s linear var(--transition-slow);
}

.page-skeleton.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.page-skeleton__inner {
  width: 100%;
  max-width: var(--prose-max-width);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.skeleton {
  height: 0.95rem;
  border-radius: calc(var(--card-radius) - 4px);
  background: color-mix(in srgb, var(--text) 9%, var(--card));
  animation: skeleton-pulse 1.15s ease-in-out infinite;
}

.skeleton--title {
  height: 2.1rem;
  width: min(72%, 18rem);
}

.skeleton--line {
  width: 100%;
}

.skeleton--short {
  width: 58%;
}

@media (prefers-reduced-motion: reduce) {
  .skeleton {
    animation: none;
    opacity: 0.55;
  }

  .page-skeleton {
    transition: opacity 0.15s ease, visibility 0s linear 0.15s;
  }
}

/* Компонент: карточка */
.card {
  background: var(--card);
  border: 1px solid color-mix(in srgb, var(--text) 10%, transparent);
  border-radius: var(--card-radius);
  padding: 1.25rem 1.4rem;
  box-shadow: var(--card-shadow);
  transition:
    transform var(--transition),
    box-shadow var(--transition-slow),
    border-color var(--transition-fast),
    background var(--transition-fast);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
  border-color: color-mix(
    in srgb,
    var(--accent) 28%,
    color-mix(in srgb, var(--text) 10%, transparent)
  );
}

.card h1 {
  margin: 0 0 0.75rem;
  color: var(--text);
}

.card ul,
.card ol {
  margin: 0.35rem 0 0;
  padding-left: 1.2rem;
}

.card li {
  margin: 0.35rem 0;
}

.card a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

.card a:hover {
  text-decoration: underline;
}

a.card {
  display: block;
  color: inherit;
  text-decoration: none;
}

a.card:hover {
  color: inherit;
}

.card--static,
.card--static:hover {
  transform: none;
  box-shadow: var(--card-shadow);
  transition: none;
}

html {
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-optical-sizing: auto;
  font-size: 100%;
  scroll-behavior: smooth;
}

body {
  line-height: var(--line-height-prose);
}

/* Плавные интерактивные состояния */
#content .site-layout__main a,
.site-footer a,
.site-header__nav {
  transition: color var(--transition-fast), opacity var(--transition-fast),
    filter var(--transition-fast);
}

.site-header__logo {
  transition: color var(--transition-fast), opacity var(--transition-fast),
    transform var(--transition);
}

.site-header__logo:hover {
  transform: scale(1.02);
}

.site-header__search input[name="q"],
.site-header__search button[type="submit"] {
  transition: border-color var(--transition-fast), background var(--transition-fast),
    color var(--transition-fast), box-shadow var(--transition-fast),
    filter var(--transition-fast);
}

.site-header__search input[name="q"]:hover {
  border-color: color-mix(in srgb, var(--accent) 35%, color-mix(in srgb, var(--text) 16%, transparent));
}

/* Layout: контент + sticky sidebar */
.site-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 16.75rem;
  gap: 2rem 2.5rem;
  align-items: start;
  justify-items: start;
  width: 100%;
  max-width: min(74rem, 100%);
  margin-inline: auto;
  padding: 1rem 1.25rem 2.25rem;
  box-sizing: border-box;
}

.site-layout__sidebar {
  position: sticky;
  top: var(--site-sticky-sidebar-top, 6.85rem);
  width: 100%;
  min-width: 0;
  padding: 1.1rem 1.15rem;
  border-radius: var(--card-radius);
  border: 1px solid color-mix(in srgb, var(--text) 10%, transparent);
  background: var(--card);
  box-shadow: var(--card-shadow);
  font-size: 0.92rem;
  line-height: 1.45;
  z-index: 1;
  transition: top 0.32s var(--ease-out-soft);
}

.site-sidebar-nav__title {
  margin: 0 0 0.65rem;
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.site-sidebar-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-sidebar-nav li {
  margin: 0.4rem 0;
}

.site-sidebar-nav a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.site-sidebar-nav a:hover {
  text-decoration: underline;
}

@media (prefers-reduced-motion: reduce) {
  .site-layout__sidebar {
    transition: none;
  }
}

@media (max-width: 900px) {
  .site-layout {
    grid-template-columns: 1fr;
  }

  .site-layout__sidebar {
    position: static;
    max-width: min(24rem, 100%);
  }
}

/* Основная колонка: удобная длина строки */
#content .site-layout__main {
  max-width: var(--prose-max-width);
  width: 100%;
  min-width: 0;
  line-height: var(--line-height-prose);
}

#content .site-layout__main h1 {
  font-size: clamp(1.875rem, 4.8vw, 2.625rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0.15em 0 0.55em;
}

/* Подписи блоков в карточках (тег, поиск) — не как контентные h2 */
#content .site-layout__main .card h2 {
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  line-height: 1.4;
  margin: 0 0 0.65rem;
}

#content .site-layout__main article h2 {
  font-size: clamp(1.35rem, 2.8vw, 1.85rem);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.025em;
  margin: 1.35em 0 0.55em;
}

#content .site-layout__main article h3 {
  font-size: clamp(1.12rem, 2.1vw, 1.4rem);
  font-weight: 650;
  line-height: 1.28;
  letter-spacing: -0.02em;
  margin: 1.2em 0 0.45em;
}

#content .site-layout__main article h4 {
  font-size: 1.08rem;
  font-weight: 650;
  line-height: 1.35;
  margin: 1.1em 0 0.4em;
}

/* Заголовки в теле статьи (Quill) */
#content .site-layout__main article .ql-editor h1 {
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin: 0.85em 0 0.45em;
}

#content .site-layout__main article .ql-editor h2 {
  font-size: clamp(1.22rem, 2.4vw, 1.62rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 1em 0 0.4em;
}

#content .site-layout__main article .ql-editor h3 {
  font-size: clamp(1.05rem, 1.8vw, 1.28rem);
  font-weight: 650;
  line-height: 1.3;
  margin: 0.9em 0 0.35em;
}

#content .site-layout__main p,
#content .site-layout__main li,
#content .site-layout__main dd,
#content .site-layout__main article .ql-editor p,
#content .site-layout__main article .ql-editor li {
  line-height: var(--line-height-prose);
}

#content .site-layout__main ul,
#content .site-layout__main ol {
  margin: 0.5em 0 1em;
  padding-left: 1.35em;
}

/* Доступность: без лишней анимации */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .card:hover {
    transform: none;
    box-shadow: var(--card-shadow);
    border-color: color-mix(in srgb, var(--text) 10%, transparent);
  }

  .site-header__logo:hover {
    transform: none;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }
}