/* ==========================================================================
   Портфолио — статическая тема.

   Раскладка: слева меню, в центре содержимое, справа колонка фактов.
   Без скриптов, без внешних запросов, без inline-стилей (CSP:
   script-src 'none', style-src 'self').

   Цвет: базовый синий + по одному акценту на проект (teal / amber / violet).
   ========================================================================== */

/* ---------- токены ---------- */
:root {
  color-scheme: light dark;

  --bg: #f6f7fb;
  --surface: #ffffff;
  --surface-2: #eef2f9;
  --ink: #0f172a;
  --muted: #55637a;
  --faint: #8492a6;
  --line: #e2e8f0;
  --line-strong: #c8d3e3;

  --blue: #2563eb;
  --blue-rgb: 37, 99, 235;
  --teal: #0f766e;
  --teal-rgb: 15, 118, 110;
  --amber: #b45309;
  --amber-rgb: 180, 83, 9;
  --violet: #6d28d9;
  --violet-rgb: 109, 40, 217;
  --green: #15803d;
  --green-rgb: 21, 128, 61;
  --rose: #be123c;
  --rose-rgb: 190, 18, 60;

  --accent: var(--blue);
  --accent-rgb: var(--blue-rgb);
  --on-accent: #ffffff;

  --r: 10px;
  --r-sm: 6px;
  --sidebar: 264px;
  --rail: 300px;
  --mono: ui-monospace, SFMono-Regular, "Cascadia Mono", "JetBrains Mono",
    Consolas, "Liberation Mono", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f17;
    --surface: #111725;
    --surface-2: #161e2e;
    --ink: #e8ecf4;
    --muted: #a2b0c4;
    --faint: #7d8a9d;
    --line: #1f2938;
    --line-strong: #2e3d53;

    --blue: #7ea6ff;
    --blue-rgb: 126, 166, 255;
    --teal: #4ecdc4;
    --teal-rgb: 78, 205, 196;
    --amber: #f2b45c;
    --amber-rgb: 242, 180, 92;
    --violet: #b79cff;
    --violet-rgb: 183, 156, 255;
    --green: #57d18c;
    --green-rgb: 87, 209, 140;
    --rose: #ff8fa3;
    --rose-rgb: 255, 143, 163;

    --on-accent: #0b0f17;
  }
}

/* ---------- сброс ---------- */
*,
*::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-family: var(--sans);
  font-size: 1.02rem;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--accent);
  text-decoration-color: rgba(var(--accent-rgb), 0.35);
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-color: currentColor;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

::selection {
  background: rgba(var(--blue-rgb), 0.2);
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 20;
  background: var(--ink);
  color: var(--bg);
  padding: 0.6rem 1rem;
  border-radius: 0 0 var(--r-sm) 0;
}

.skip:focus {
  left: 0;
}

/* ---------- каркас ---------- */
body {
  display: grid;
  grid-template-columns: var(--sidebar) minmax(0, 1fr);
  align-items: start;
  min-height: 100vh;
}

.page {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--rail);
  align-items: start;
  min-width: 0;
}

/* ---------- меню слева ---------- */
.sidebar {
  position: sticky;
  top: 0;
  z-index: 10;
  height: 100vh;
  overflow-y: auto;
  padding: 22px 16px 20px;
  border-right: 1px solid var(--line);
  background: var(--surface);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0 0.35rem;
  text-decoration: none;
  color: inherit;
}

.brand__mark {
  width: 28px;
  height: 28px;
  flex: none;
}

.brand__mark .frame {
  fill: none;
  stroke: var(--ink);
  stroke-width: 1.8;
  opacity: 0.9;
}

.brand__mark .sq1 {
  fill: var(--blue);
}

.brand__mark .sq2 {
  fill: var(--teal);
}

.brand__mark .sq3 {
  fill: var(--amber);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  min-width: 0;
}

.brand__name {
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}

.brand__role {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}

.menu {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.menu__label {
  margin: 0 0 2px;
  padding: 0 0.7rem;
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}

.menu a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.7rem;
  border-radius: var(--r-sm);
  color: var(--muted);
  font-size: 0.94rem;
  text-decoration: none;
  border-left: 2px solid transparent;
}

.menu a:hover {
  background: var(--surface-2);
  color: var(--ink);
}

.menu a.is-active {
  background: rgba(var(--blue-rgb), 0.09);
  color: var(--blue);
  font-weight: 600;
  border-left-color: var(--blue);
}

.menu--sub a {
  font-size: 0.9rem;
  padding-block: 0.4rem;
}

.menu--sub a.is-active {
  background: rgba(var(--c-rgb, var(--blue-rgb)), 0.1);
  color: var(--c, var(--blue));
  border-left-color: var(--c, var(--blue));
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex: none;
  background: var(--c, var(--blue));
}

.side-card {
  margin-top: auto;
  padding: 0.8rem 0.85rem 0.85rem;
  border: 1px solid rgba(var(--blue-rgb), 0.16);
  border-radius: var(--r-sm);
  background: rgba(var(--blue-rgb), 0.05);
}

.side-card__label {
  margin: 0 0 0.25rem;
  font-family: var(--mono);
  font-size: 0.5625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--blue);
}

.side-card__text {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--muted);
}

.sidebar__bottom {
  margin-top: 0;
  display: grid;
  gap: 0.7rem;
  padding: 0.9rem 0.7rem 0;
  border-top: 1px solid var(--line);
}

.sidebar__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.8rem;
  font-size: 0.85rem;
}

.sidebar__links a {
  color: var(--muted);
  text-decoration: none;
}

.sidebar__links a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.sidebar__note {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.5625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
  line-height: 1.7;
}

/* ---------- центральная колонка ---------- */
.content {
  min-width: 0;
  padding: clamp(24px, 3.4vw, 44px) clamp(20px, 3vw, 44px) 0;
}

.content__inner {
  max-width: 48rem;
  margin-inline: auto;
}

/* ---------- правая колонка ---------- */
.rail {
  position: sticky;
  top: 0;
  max-height: 100vh;
  overflow-y: auto;
  padding: clamp(24px, 3.4vw, 44px) 20px 40px;
  border-left: 1px solid var(--line);
  display: grid;
  gap: 14px;
  align-content: start;
}

.rail-card {
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--surface);
  padding: 0.95rem 1rem 1rem;
}

.rail-card > h2 {
  margin: 0 0 0.6rem;
  font-family: var(--mono);
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}

.rail-card--tint {
  background: rgba(var(--blue-rgb), 0.05);
  border-color: rgba(var(--blue-rgb), 0.18);
}

.rail-card--tint > h2 {
  color: var(--blue);
  opacity: 0.9;
}

.rail__text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--muted);
}

.rail__text a {
  color: var(--blue);
}

.toc {
  display: grid;
}

.toc a {
  display: block;
  padding: 0.3rem 0;
  font-size: 0.88rem;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px dashed var(--line);
}

.toc a:last-child {
  border-bottom: 0;
}

.toc a:hover {
  color: var(--blue);
}

.rail__row {
  display: grid;
  grid-template-columns: 4.9rem minmax(0, 1fr);
  gap: 0.6rem;
  padding: 0.45rem 0;
  border-top: 1px solid var(--line);
  font-size: 0.86rem;
}

.rail__row:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.rail__label {
  font-family: var(--mono);
  font-size: 0.5625rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--faint);
  padding-top: 0.25rem;
}

.rail__row a {
  color: var(--ink);
  text-decoration-color: var(--line-strong);
}

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

/* ---------- типографика ---------- */
h1,
h2,
h3 {
  font-weight: 700;
  text-wrap: balance;
}

h1 {
  font-size: clamp(1.9rem, 3.9vw, 2.85rem);
  line-height: 1.05;
  letter-spacing: -0.032em;
  margin: 0.5rem 0 0;
}

h2 {
  font-size: clamp(1.28rem, 2.4vw, 1.65rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0.35rem 0 0;
}

h3 {
  font-size: 1.02rem;
  letter-spacing: -0.005em;
  margin: 0 0 0.45rem;
}

.eyebrow {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c, var(--faint));
}

.eyebrow__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.5rem;
  height: 1.5rem;
  padding: 0 0.35rem;
  border-radius: 5px;
  background: rgba(var(--c-rgb, var(--blue-rgb)), 0.1);
  color: var(--c, var(--blue));
  font-size: 0.625rem;
  letter-spacing: 0.04em;
}

.lead {
  margin: 1rem 0 0;
  max-width: 62ch;
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  line-height: 1.58;
  color: var(--muted);
}

.lead strong {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- герой ---------- */
.hero {
  margin: 0 0 clamp(1.4rem, 2.8vw, 2.2rem);
  padding: clamp(1.3rem, 2.6vw, 1.9rem);
  border: 1px solid rgba(var(--blue-rgb), 0.16);
  border-radius: 14px;
  background:
    radial-gradient(120% 150% at 0% 0%, rgba(var(--blue-rgb), 0.1), transparent 62%),
    radial-gradient(100% 130% at 100% 0%, rgba(var(--teal-rgb), 0.1), transparent 58%),
    var(--surface);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  border: 1px solid var(--accent);
  border-radius: var(--r-sm);
  background: var(--accent);
  color: var(--on-accent);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
  background: color-mix(in srgb, var(--accent) 84%, #000000);
  border-color: color-mix(in srgb, var(--accent) 84%, #000000);
  color: var(--on-accent);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}

.btn--ghost:hover {
  background: var(--surface);
  color: var(--blue);
  border-color: var(--blue);
}

.btn--sm {
  padding: 0.45rem 0.8rem;
  font-size: 0.82rem;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1.4rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.22rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

.chip--c {
  border-color: rgba(var(--c-rgb, var(--blue-rgb)), 0.25);
  background: rgba(var(--c-rgb, var(--blue-rgb)), 0.08);
  color: var(--c, var(--blue));
}

/* ---------- секции ---------- */
.section {
  padding-block: clamp(1.9rem, 3.6vw, 2.9rem);
  border-bottom: 1px solid var(--line);
}

.section:last-of-type {
  border-bottom: 0;
}

.section-head {
  display: grid;
  gap: 0.45rem;
  margin-bottom: 1.4rem;
  max-width: 60ch;
}

.section-head p {
  margin: 0.3rem 0 0;
  color: var(--muted);
  font-size: 0.97rem;
}

.section-note {
  margin: 1rem 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.section-note a {
  color: var(--c, var(--blue));
  font-weight: 600;
}

[data-c="blue"] {
  --c: var(--blue);
  --c-rgb: var(--blue-rgb);
}

[data-c="teal"] {
  --c: var(--teal);
  --c-rgb: var(--teal-rgb);
}

[data-c="amber"] {
  --c: var(--amber);
  --c-rgb: var(--amber-rgb);
}

[data-c="violet"] {
  --c: var(--violet);
  --c-rgb: var(--violet-rgb);
}

[data-c="green"] {
  --c: var(--green);
  --c-rgb: var(--green-rgb);
}

/* ---------- карточки проектов ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.cards--2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

/* сетка карточек и следующий за ней текст не слипаются */
.cards + .prose,
.numbers + .prose,
.steps + .prose {
  margin-top: 1.1rem;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1rem 1.05rem 1rem;
  border: 1px solid var(--line);
  border-top: 3px solid var(--c, var(--accent));
  border-radius: var(--r);
  background: var(--surface);
  color: inherit;
  text-decoration: none;
}

a.card {
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

a.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(15, 23, 42, 0.09);
  border-color: rgba(var(--c-rgb, var(--blue-rgb)), 0.45);
}

a.card:hover .card__title {
  color: var(--c, var(--blue));
}

.card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
}

.card__num {
  font-family: var(--mono);
  font-size: 0.5625rem;
  letter-spacing: 0.12em;
  color: var(--faint);
}

.card__title {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.card__text {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.55;
}

.card__foot {
  margin-top: auto;
  padding-top: 0.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

/* ---------- метки ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.16rem 0.5rem 0.16rem 0.4rem;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 0.5625rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
  background: rgba(var(--green-rgb), 0.1);
  color: var(--green);
}

.badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.badge--wait {
  background: rgba(var(--amber-rgb), 0.12);
  color: var(--amber);
}

.badge--quiet {
  background: var(--surface-2);
  color: var(--muted);
}

/* ---------- цифры ---------- */
.numbers {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.num-card {
  padding: 0.95rem 1.05rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--surface);
  display: grid;
  gap: 0.3rem;
  align-content: start;
}

.num {
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c, var(--blue));
}

.num-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.5;
}

/* ---------- шаги ---------- */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.steps li {
  display: grid;
  grid-template-columns: 1.7rem minmax(0, 1fr);
  gap: 0.7rem;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--line);
  border-left: 3px solid rgba(var(--c-rgb, var(--blue-rgb)), 0.55);
  border-radius: var(--r-sm);
  background: var(--surface);
}

.steps__num {
  width: 1.7rem;
  height: 1.7rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(var(--c-rgb, var(--blue-rgb)), 0.1);
  color: var(--c, var(--blue));
  font-family: var(--mono);
  font-size: 0.625rem;
  font-weight: 600;
}

.steps__body b {
  display: block;
  font-size: 0.95rem;
}

.steps__body p {
  margin: 0.1rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

/* ---------- факты ---------- */
.facts {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--surface);
  overflow: hidden;
}

.facts > div {
  display: grid;
  grid-template-columns: minmax(8.5rem, 12rem) minmax(0, 1fr);
  border-top: 1px solid var(--line);
}

.facts > div:first-child {
  border-top: 0;
}

.facts dt {
  padding: 0.6rem 0.9rem;
  font-family: var(--mono);
  font-size: 0.5625rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
  display: flex;
  align-items: center;
}

.facts dd {
  margin: 0;
  padding: 0.6rem 0.9rem;
  font-size: 0.92rem;
  border-left: 1px solid var(--line);
}

@media (max-width: 620px) {
  .facts > div {
    grid-template-columns: 1fr;
  }

  .facts dt {
    padding-bottom: 0.1rem;
  }

  .facts dd {
    padding-top: 0.1rem;
    border-left: 0;
  }
}

/* ---------- проза ---------- */
.prose {
  max-width: 66ch;
}

.prose > :first-child {
  margin-top: 0;
}

.prose p {
  margin: 0 0 0.85rem;
}

.prose h2 {
  margin: 1.9rem 0 0.6rem;
}

.prose h3 {
  margin: 1.4rem 0 0.4rem;
}

.prose ul,
.prose ol {
  margin: 0 0 0.9rem;
  padding-left: 1.1rem;
}

.prose li {
  margin-bottom: 0.4rem;
}

.prose li::marker {
  color: var(--c, var(--blue));
  font-weight: 600;
}

.prose code,
.card code,
.num-card code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--surface-2);
  border-radius: 4px;
  padding: 0.05em 0.35em;
}

.prose a {
  color: var(--blue);
}

/* ---------- врезка ---------- */
.callout {
  margin: 1.2rem 0 0;
  padding: 0.8rem 1rem;
  border: 1px solid rgba(var(--c-rgb, var(--blue-rgb)), 0.22);
  border-left: 3px solid var(--c, var(--blue));
  border-radius: var(--r-sm);
  background: rgba(var(--c-rgb, var(--blue-rgb)), 0.06);
  color: var(--muted);
  font-size: 0.9rem;
}

.callout strong {
  color: var(--ink);
}

/* ---------- диаграмма ---------- */
.diagram {
  margin: 0 0 1.1rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--surface);
  overflow-x: auto;
}

.diagram svg {
  display: block;
  width: 100%;
  min-width: 600px;
  height: auto;
}

.diagram figcaption {
  margin-top: 0.7rem;
  font-family: var(--mono);
  font-size: 0.5625rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
}

.d-box {
  fill: var(--surface);
  stroke: var(--line-strong);
  stroke-width: 1.2;
}

/* тонировка по проектам: карта системы и слои */
.d-tv {
  fill: rgba(var(--teal-rgb), 0.07);
}

.d-bp {
  fill: rgba(var(--amber-rgb), 0.07);
}

.d-node {
  fill: rgba(var(--violet-rgb), 0.07);
}

.d-strip {
  fill: var(--surface-2);
}

.d-bar-tv {
  fill: var(--teal);
}

.d-bar-bp {
  fill: var(--amber);
}

.d-bar-node {
  fill: var(--violet);
}

.d-dash {
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 1;
  stroke-dasharray: 5 4;
}

.d-box--key {
  fill: rgba(var(--blue-rgb), 0.08);
  stroke: var(--blue);
  stroke-width: 1.6;
}

.d-box--reject {
  fill: none;
  stroke: rgba(var(--rose-rgb), 0.55);
  stroke-width: 1.2;
  stroke-dasharray: 4 3;
}

.d-label {
  fill: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.d-sub {
  fill: var(--faint);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.02em;
}

.d-line {
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 1.2;
}

.d-arrow {
  fill: var(--line-strong);
}

.d-fail {
  fill: none;
  stroke: rgba(var(--rose-rgb), 0.55);
  stroke-width: 1.2;
  stroke-dasharray: 3 4;
}

.d-fail-arrow {
  fill: rgba(var(--rose-rgb), 0.75);
}

.d-fail-label {
  fill: var(--rose);
  font-family: var(--mono);
  font-size: 9.5px;
}

/* ---------- страница проекта ---------- */
.page-head {
  margin: 0 0 clamp(1.4rem, 2.6vw, 2rem);
  padding: clamp(1.2rem, 2.4vw, 1.7rem);
  border: 1px solid rgba(var(--c-rgb, var(--blue-rgb)), 0.16);
  border-radius: 14px;
  background:
    radial-gradient(120% 150% at 0% 0%, rgba(var(--c-rgb, var(--blue-rgb)), 0.1), transparent 62%),
    radial-gradient(90% 120% at 100% 0%, rgba(var(--teal-rgb), 0.06), transparent 55%),
    var(--surface);
}

.page-head h1 {
  margin-top: 0.55rem;
}

.page-head .lead {
  margin-top: 0.6rem;
}

.page-head__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  margin-top: 1rem;
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
}

.page-head__row a {
  color: var(--ink);
  text-transform: none;
  letter-spacing: 0.01em;
  text-decoration-color: var(--line-strong);
}

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

/* ---------- список в каталоге ---------- */
.list {
  display: grid;
  gap: 8px;
}

.list__item {
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr) auto;
  gap: 0.2rem 0.8rem;
  align-items: start;
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--c, var(--accent));
  border-radius: var(--r-sm);
  background: var(--surface);
  text-decoration: none;
  color: inherit;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.list__item:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.08);
}

.list__item:hover .list__title {
  color: var(--c, var(--blue));
}

.list__num {
  font-family: var(--mono);
  font-size: 0.625rem;
  letter-spacing: 0.08em;
  color: var(--faint);
  padding-top: 0.3rem;
}

.list__title {
  display: block;
  font-weight: 700;
  font-size: 0.98rem;
}

.list__desc {
  display: block;
  margin-top: 0.15rem;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

.list__side {
  padding-top: 0.3rem;
}

@media (max-width: 620px) {
  .list__item {
    grid-template-columns: 1.8rem minmax(0, 1fr);
  }

  .list__side {
    grid-column: 2;
    padding-top: 0.1rem;
  }
}

/* ---------- ссылка назад ---------- */
.backlink {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 1.6rem;
  font-size: 0.88rem;
  color: var(--muted);
  text-decoration: none;
}

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

/* ---------- плейсхолдеры ---------- */
.ph {
  color: var(--violet);
  background: rgba(var(--violet-rgb), 0.09);
  border-bottom: 1px dashed currentColor;
  border-radius: 3px;
  padding: 0.02em 0.18em;
  font-style: normal;
}

h1 .ph {
  background: transparent;
  padding: 0;
  border-bottom: 2px dashed currentColor;
}

/* ---------- подвал ---------- */
.footer {
  margin-top: clamp(1.8rem, 3.4vw, 2.8rem);
  padding: 1.4rem 0 1.8rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.86rem;
}

.footer__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
}

.footer__label {
  margin: 0 0 0.3rem;
  font-family: var(--mono);
  font-size: 0.5625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
}

.footer__name {
  margin: 0;
  font-weight: 600;
  color: var(--ink);
}

.footer__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.2rem;
}

.footer__links a {
  color: var(--ink);
  text-decoration-color: var(--line-strong);
}

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

.footer__meta {
  margin: 1.2rem 0 0;
  padding-top: 0.8rem;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.5625rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.9rem;
}

.footer__meta a {
  color: var(--muted);
}

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

/* ---------- служебное ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- адаптив ---------- */
@media (max-width: 1180px) {
  :root {
    --rail: 272px;
  }
}

@media (max-width: 1040px) {
  .page {
    grid-template-columns: minmax(0, 1fr);
  }

  .rail {
    position: static;
    max-height: none;
    border-left: 0;
    border-top: 1px solid var(--line);
    padding: 1.4rem clamp(20px, 3vw, 44px) 2rem;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    display: grid;
    gap: 12px;
  }
}

@media (max-width: 860px) {
  body {
    grid-template-columns: minmax(0, 1fr);
  }

  .sidebar {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 16px clamp(16px, 3vw, 24px);
    gap: 12px;
    overflow: visible;
  }

  .menu {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .menu a {
    border-left: 0;
    border-bottom: 2px solid transparent;
  }

  .menu a.is-active {
    border-left: 0;
    border-bottom-color: var(--blue);
  }

  .menu--sub {
    display: none;
  }

  .menu__label {
    display: none;
  }

  .sidebar__bottom {
    margin-top: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem 0.9rem;
    padding-top: 0.8rem;
  }

  .side-card {
    display: none;
  }
}

@media (max-width: 720px) {
  .cards,
  .cards--2,
  .numbers {
    grid-template-columns: minmax(0, 1fr);
  }
}

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