/* ==========================================================================
   «Есть идея» — стили сайта-визитки
   Палитра: тёплая бумага, чернила, один сигнальный акцент.
   Мотив: лестница идея → структура → продукт → бизнес.
   ========================================================================== */

/* ---------- шрифт (Manrope, SIL OFL 1.1, см. /fonts/OFL.txt) ---------- */
@font-face {
  font-family: 'Manrope';
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url('/fonts/manrope-cyrillic.woff2') format('woff2');
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
@font-face {
  font-family: 'Manrope';
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url('/fonts/manrope-latin.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+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* ---------- токены ---------- */
:root {
  --paper: #f6f2ea;
  --paper-2: #ede7da;
  --paper-3: #e4dccb;
  --ink: #171511;
  --ink-soft: #37332c;
  --muted: #5f5a51;
  --line: #d6cdbc;
  --line-strong: #b9ae99;
  --accent: #f26b1d;
  --accent-deep: #b3480a;
  --accent-soft: #fbe3d3;
  --on-dark: #f6f2ea;
  --on-dark-muted: #c9c1b2;
  --dark-line: #3d3931;

  --font: 'Manrope', 'Inter', 'Segoe UI', system-ui, -apple-system, Roboto, 'Helvetica Neue', Arial, sans-serif;

  --text-sm: clamp(0.84rem, 0.8rem + 0.2vw, 0.92rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
  --text-lg: clamp(1.1rem, 1rem + 0.5vw, 1.3rem);
  --text-xl: clamp(1.35rem, 1.15rem + 0.9vw, 1.9rem);
  --text-2xl: clamp(1.75rem, 1.3rem + 2vw, 2.9rem);
  --text-display: clamp(2.3rem, 1.4rem + 4.6vw, 5.4rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;
  --space-9: clamp(4rem, 3rem + 6vw, 8rem);

  --container: 76rem;
  --gutter: clamp(1.125rem, 4vw, 3rem);
  --radius: 0.375rem;
  --radius-lg: 0.75rem;
  --header-h: 4.25rem;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 0.6s;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  font-feature-settings: 'kern', 'liga', 'cv05';
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

p {
  margin: 0;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

a {
  color: inherit;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
  transition: text-decoration-color 0.2s;
}
a:hover {
  text-decoration-color: var(--accent);
}

strong {
  font-weight: 700;
}

:focus-visible {
  outline: 2px solid var(--accent-deep);
  outline-offset: 3px;
  border-radius: 2px;
}

.container {
  width: min(100% - 2 * var(--gutter), var(--container));
  margin-inline: auto;
}

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

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  background: var(--ink);
  color: var(--on-dark);
  border-radius: var(--radius);
  text-decoration: none;
}
.skip-link:focus {
  top: var(--space-3);
}

[hidden] {
  display: none !important;
}

/* ---------- кнопки, ссылки ---------- */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  min-height: 3rem;
  padding: 0.75rem 1.5rem;
  border: 1.5px solid var(--ink);
  border-radius: 999px;
  background: var(--ink);
  color: var(--on-dark);
  font: inherit;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.2s var(--ease);
}
.button:hover {
  background: var(--ink-soft);
  border-color: var(--ink-soft);
}
.button:active {
  transform: translateY(1px);
}
.button--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--ink);
}
.button--primary:hover {
  background: #ff7d2e;
  border-color: #ff7d2e;
}
.button--primary::after {
  content: '→';
  font-weight: 700;
  transition: transform 0.25s var(--ease);
}
.button--primary:hover::after {
  transform: translateX(3px);
}
.button--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}
.button--ghost:hover {
  background: var(--paper-2);
  border-color: var(--ink);
}
.button--small {
  min-height: 2.5rem;
  padding: 0.5rem 1.1rem;
  font-size: var(--text-sm);
}
.button--light {
  background: var(--on-dark);
  border-color: var(--on-dark);
  color: var(--ink);
}
.button--light:hover {
  background: #fff;
  border-color: #fff;
}
.button--outline-light {
  background: transparent;
  border-color: var(--on-dark-muted);
  color: var(--on-dark);
}
.button--outline-light:hover {
  background: rgba(246, 242, 234, 0.08);
  border-color: var(--on-dark);
}
.button[disabled],
.button[aria-disabled='true'] {
  opacity: 0.55;
  cursor: not-allowed;
}

.link-arrow {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45em;
  font-weight: 600;
  text-decoration: none;
  color: var(--ink);
}
.link-arrow::after {
  content: '→';
  color: var(--accent-deep);
  font-weight: 700;
  transition: transform 0.25s var(--ease);
}
.link-arrow:hover::after {
  transform: translateX(4px);
}
.link-arrow:hover {
  text-decoration: underline;
  text-decoration-color: var(--accent);
}

/* ---------- шапка ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  min-height: var(--header-h);
}

.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 0.12em;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
  text-decoration: none;
  line-height: 1;
}
.wordmark__dot {
  display: inline-block;
  width: 0.38em;
  height: 0.38em;
  border-radius: 50%;
  background: var(--accent);
  transform: translateY(0.02em);
}
.wordmark--footer {
  font-size: 1.5rem;
}

.site-nav {
  position: relative;
}
.site-nav__toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 2.5rem;
  padding: 0.4rem 0.2rem 0.4rem 0.75rem;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.site-nav__toggle-icon {
  position: relative;
  width: 1.5rem;
  height: 1.5rem;
}
.site-nav__toggle-icon::before,
.site-nav__toggle-icon::after {
  content: '';
  position: absolute;
  left: 0.2rem;
  right: 0.2rem;
  height: 2px;
  background: currentColor;
  transition: transform 0.25s var(--ease), top 0.25s var(--ease);
}
.site-nav__toggle-icon::before {
  top: 0.45rem;
}
.site-nav__toggle-icon::after {
  top: 0.95rem;
}
.site-nav__toggle[aria-expanded='true'] .site-nav__toggle-icon::before {
  top: 0.7rem;
  transform: rotate(45deg);
}
.site-nav__toggle[aria-expanded='true'] .site-nav__toggle-icon::after {
  top: 0.7rem;
  transform: rotate(-45deg);
}

.site-nav__list {
  display: none;
  position: absolute;
  right: 0;
  top: calc(100% + 0.75rem);
  min-width: 15rem;
  padding: var(--space-3);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px -20px rgba(23, 21, 17, 0.35);
}
.site-nav__list.is-open {
  display: grid;
  gap: 0.25rem;
}
.site-nav__list a:not(.button) {
  display: block;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
}
.site-nav__list a:not(.button):hover {
  background: var(--paper-2);
}
.site-nav__cta {
  padding-top: 0.5rem;
  margin-top: 0.25rem;
  border-top: 1px solid var(--line);
}
.site-nav__cta .button {
  width: 100%;
}
.site-nav__list--static {
  position: static;
  display: flex;
  min-width: 0;
  padding: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
}

@media (min-width: 64rem) {
  .site-nav__toggle {
    display: none;
  }
  .site-nav__list {
    position: static;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    min-width: 0;
    padding: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
  }
  .site-nav__list a:not(.button) {
    padding: 0.5rem 0.85rem;
    font-size: var(--text-sm);
  }
  .site-nav__cta {
    padding-top: 0;
    margin-top: 0;
    margin-left: 0.75rem;
    border-top: 0;
  }
  .site-nav__cta .button {
    width: auto;
  }
}
@media (max-width: 63.99rem) {
  .site-nav--simple .site-nav__list--static li:not(.site-nav__cta) {
    display: none;
  }
  .site-nav--simple .site-nav__cta {
    padding: 0;
    margin: 0;
    border: 0;
  }
}

/* ---------- hero ---------- */
.hero {
  padding-block: clamp(3rem, 2rem + 5vw, 6.5rem) clamp(3rem, 2rem + 4vw, 5rem);
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.hero::before {
  /* тонкая сетка — структура, а не декорация */
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(23, 21, 17, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(23, 21, 17, 0.045) 1px, transparent 1px);
  background-size: 4rem 4rem;
  mask-image: radial-gradient(ellipse at 80% 20%, #000 0%, transparent 65%);
  -webkit-mask-image: radial-gradient(ellipse at 80% 20%, #000 0%, transparent 65%);
  pointer-events: none;
}
.hero__inner {
  position: relative;
  display: grid;
  gap: var(--space-8);
}
.hero__brand {
  font-size: var(--text-display);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.045em;
  margin-bottom: var(--space-5);
}
.hero__brand-mark {
  color: var(--accent);
}
.hero__title {
  font-size: var(--text-2xl);
  font-weight: 600;
  line-height: 1.2;
  max-width: 24ch;
  letter-spacing: -0.02em;
}
.hero__subline {
  margin-top: var(--space-5);
  max-width: 56ch;
  font-size: var(--text-lg);
  line-height: 1.55;
  color: var(--ink-soft);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: var(--space-6);
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2.5rem;
  padding: 0.45rem 1rem 0.45rem 0.8rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--paper);
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
  transition: border-color 0.2s, background 0.2s, transform 0.2s var(--ease);
}
.chip:hover {
  border-color: var(--ink);
  background: var(--paper-2);
}
.chip__arrow {
  color: var(--accent-deep);
  font-weight: 700;
  transition: transform 0.25s var(--ease);
}
.chip:hover .chip__arrow {
  transform: translateX(3px);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-7);
}

.hero__figure {
  margin: 0;
}

/* ---------- лестница (мотив) ---------- */
.ladder {
  position: relative;
  display: grid;
  gap: 0;
  counter-reset: ladder;
  margin-left: 0.5rem;
  padding-left: 1.25rem;
}
.ladder::before {
  /* вертикальная ось */
  content: '';
  position: absolute;
  left: 0;
  top: 1.1rem;
  bottom: 1.1rem;
  width: 2px;
  background: var(--line-strong);
  transform-origin: top;
  transition: transform 1.2s var(--ease);
}
.ladder__node {
  position: relative;
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  grid-template-areas:
    'idx label'
    'idx note';
  column-gap: var(--space-3);
  padding: 1rem 0 1rem 1.25rem;
  border-bottom: 1px solid var(--line);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.ladder__node:last-child {
  border-bottom: 0;
}
.ladder__node::before {
  /* узел на оси */
  content: '';
  position: absolute;
  left: -1.25rem;
  top: 1.35rem;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--ink);
  transform: translateX(-50%) translateX(1px);
  transition: background 0.3s, border-color 0.3s;
}
.ladder__node:last-child::before {
  background: var(--accent);
  border-color: var(--accent);
}
.ladder__node::after {
  /* стрелка между узлами — повторяющийся мотив → */
  content: '→';
  position: absolute;
  left: 0.1rem;
  bottom: -0.75rem;
  color: var(--accent-deep);
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1;
  transform: rotate(90deg);
  background: var(--paper);
  padding: 0.1rem;
}
.ladder__node:last-child::after {
  content: none;
}
.ladder__index {
  grid-area: idx;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--muted);
  padding-top: 0.25rem;
}
.ladder__label {
  grid-area: label;
  font-weight: 700;
  font-size: var(--text-xl);
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.ladder__note {
  grid-area: note;
  margin-top: 0.3rem;
  color: var(--muted);
  font-size: var(--text-sm);
}
.ladder__caption {
  margin-top: var(--space-4);
  padding-left: 1.25rem;
  font-size: var(--text-sm);
  color: var(--muted);
}

/* анимация появления (только когда JS доступен — класс .js ставит /js-detect.js) */
.js [data-animate] .ladder__node,
.js [data-animate] .step {
  opacity: 0;
  transform: translateY(12px);
}
[data-animate].is-visible .ladder__node,
[data-animate].is-visible .step {
  opacity: 1;
  transform: none;
}
[data-animate].is-visible .ladder__node:nth-child(2),
[data-animate].is-visible .step:nth-child(2) { transition-delay: 0.12s; }
[data-animate].is-visible .ladder__node:nth-child(3),
[data-animate].is-visible .step:nth-child(3) { transition-delay: 0.24s; }
[data-animate].is-visible .ladder__node:nth-child(4),
[data-animate].is-visible .step:nth-child(4) { transition-delay: 0.36s; }
[data-animate].is-visible .step:nth-child(5) { transition-delay: 0.48s; }
.js .ladder[data-animate]::before {
  transform: scaleY(0);
}
.js .ladder[data-animate].is-visible::before {
  transform: scaleY(1);
}

@media (min-width: 64rem) {
  .hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
    gap: clamp(3rem, 6vw, 6rem);
  }
  .hero__figure {
    padding: var(--space-6) var(--space-6) var(--space-5);
    background: color-mix(in srgb, var(--paper) 70%, #fff 30%);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
  }
}

/* ---------- секции ---------- */
.section {
  padding-block: var(--space-9);
  border-bottom: 1px solid var(--line);
}
.section__head {
  display: grid;
  gap: var(--space-4);
  max-width: 62ch;
  margin-bottom: clamp(2.5rem, 2rem + 3vw, 4.5rem);
}
.section__index {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--muted);
}
.section__index::after {
  content: '';
  width: 2.5rem;
  height: 1px;
  background: var(--accent);
}
.section__index--light {
  color: var(--on-dark-muted);
}
.section__title {
  font-size: var(--text-2xl);
  font-weight: 700;
}
.section__lead {
  font-size: var(--text-lg);
  color: var(--ink-soft);
  line-height: 1.5;
}

/* ---------- услуги ---------- */
.services {
  display: grid;
  border-top: 1px solid var(--line-strong);
}
.service {
  display: grid;
  gap: var(--space-6);
  padding-block: clamp(2rem, 1.5rem + 2.5vw, 3.5rem);
  border-bottom: 1px solid var(--line-strong);
}
.service--next {
  background:
    linear-gradient(to right, transparent calc(100% - 1px), transparent),
    repeating-linear-gradient(-45deg, transparent 0 10px, rgba(23, 21, 17, 0.025) 10px 11px);
  margin-inline: calc(-1 * var(--gutter));
  padding-inline: var(--gutter);
}
.service__head {
  display: grid;
  gap: var(--space-4);
  align-content: start;
}
.service__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.tag::before {
  content: '';
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
}
.tag--current {
  background: var(--paper-2);
  color: var(--ink);
}
.tag--current::before {
  background: var(--ink);
}
.tag--next {
  background: var(--accent-soft);
  color: #9c3d07; /* контраст к --accent-soft ≥ 5.5:1 */
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
}
.tag--next::before {
  background: var(--accent);
}
.service__num {
  font-size: var(--text-2xl);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--line-strong);
}
.service__title {
  font-size: var(--text-xl);
}
.service__promise {
  font-size: var(--text-lg);
  line-height: 1.5;
  color: var(--ink-soft);
}
.service__body {
  display: grid;
  gap: var(--space-5);
  margin: 0;
}
.service__row {
  display: grid;
  align-content: start;
  gap: var(--space-2);
  padding-top: var(--space-4);
  border-top: 1px solid var(--line);
}
.service__row dt {
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}
.service__row dd {
  margin: 0;
}
.service__principle p + p {
  margin-top: var(--space-2);
}
.service__principle > p:first-child {
  font-weight: 600;
}
.service__decisions {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
}
.service__cta {
  padding-top: var(--space-2);
}

.chain {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.5rem;
  font-weight: 600;
  font-size: var(--text-sm);
}
.chain li {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
}
.chain li:not(:last-child)::after {
  content: '→';
  color: var(--accent-deep);
  font-weight: 700;
}

.list {
  display: grid;
  gap: 0.4rem;
  padding-left: 1.1rem;
  list-style: disc;
}
.list li::marker {
  color: var(--accent-deep);
}

@media (min-width: 48rem) {
  .service__body {
    grid-template-columns: 1fr 1fr;
    column-gap: var(--space-6);
  }
  .service__row:nth-child(2),
  .service__row:nth-child(3) {
    grid-column: span 1;
  }
}
@media (min-width: 64rem) {
  .service {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: var(--space-5) clamp(2rem, 5vw, 5rem);
  }
  .service__head {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }
  .service__cta {
    grid-column: 2;
  }
}

/* ---------- процесс ---------- */
.steps {
  display: grid;
  gap: 0;
  counter-reset: steps;
  position: relative;
}
.step {
  position: relative;
  display: grid;
  gap: var(--space-2);
  padding: var(--space-5) 0 var(--space-5) 3.25rem;
  border-top: 1px solid var(--line-strong);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.step__index {
  position: absolute;
  left: 0;
  top: var(--space-5);
  width: 2.25rem;
  height: 2.25rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1.5px solid var(--ink);
  font-weight: 700;
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
  background: var(--paper);
}
.step:last-child .step__index {
  background: var(--accent);
  border-color: var(--accent);
}
.step__title {
  font-size: var(--text-xl);
}
.step__text {
  color: var(--ink-soft);
}

@media (min-width: 48rem) and (max-width: 63.99rem) {
  /* планшет: две колонки, последний шаг на всю ширину */
  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--space-6);
  }
  .step:last-child {
    grid-column: 1 / -1;
  }
}
@media (min-width: 64rem) {
  .steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: var(--space-6);
  }
  .step {
    padding: var(--space-5) 0 0;
  }
  .step__index {
    position: static;
    margin-bottom: var(--space-3);
  }
  .step:not(:last-child)::after {
    /* стрелка-переход между шагами */
    content: '→';
    position: absolute;
    top: calc(var(--space-5) + 0.45rem);
    right: calc(-1 * var(--space-6) / 2 - 0.35rem);
    color: var(--accent-deep);
    font-weight: 700;
    font-size: 0.95rem;
  }
  .step__title {
    font-size: var(--text-lg);
    hyphens: auto;
    overflow-wrap: anywhere;
  }
  .step__text {
    font-size: var(--text-sm);
    line-height: 1.6;
  }
}

.principle-banner {
  margin-top: clamp(2.5rem, 2rem + 3vw, 4.5rem);
  padding: clamp(1.5rem, 1rem + 2vw, 2.5rem);
  display: grid;
  gap: var(--space-3);
  background: var(--ink);
  color: var(--on-dark);
  border-radius: var(--radius-lg);
}
.principle-banner__text {
  font-size: var(--text-xl);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  max-width: 28ch;
}
.principle-banner__accent {
  color: var(--accent);
}
.principle-banner__note {
  color: var(--on-dark-muted);
  max-width: 60ch;
}
@media (min-width: 48rem) {
  .principle-banner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    gap: var(--space-6);
  }
}

/* ---------- аудитория ---------- */
.audience {
  display: grid;
  gap: 1px;
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.audience__item {
  display: grid;
  gap: var(--space-3);
  align-content: start;
  padding: clamp(1.25rem, 1rem + 1.5vw, 2rem);
  background: var(--paper);
  transition: background 0.2s;
}
.audience__item:hover {
  background: color-mix(in srgb, var(--paper) 70%, #fff 30%);
}
.audience__title {
  font-size: var(--text-lg);
}
.audience__text {
  color: var(--ink-soft);
}
.audience__route {
  display: inline-flex;
  gap: 0.4rem;
  align-items: baseline;
  margin-top: var(--space-2);
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
}
.audience__route span {
  color: var(--accent-deep);
  font-weight: 700;
}
.audience__route:hover {
  text-decoration: underline;
  text-decoration-color: var(--accent);
}
@media (min-width: 48rem) {
  .audience {
    grid-template-columns: 1fr 1fr;
  }
}

/* ---------- принципы ---------- */
.principles {
  display: grid;
  counter-reset: principles;
  border-top: 1px solid var(--line-strong);
}
.principles__item {
  counter-increment: principles;
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: var(--space-2) var(--space-4);
  padding-block: var(--space-5);
  border-bottom: 1px solid var(--line);
}
.principles__item::before {
  content: counter(principles, decimal-leading-zero);
  grid-row: span 2;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--accent-deep);
  padding-top: 0.2rem;
}
.principles__title {
  font-size: var(--text-lg);
}
.principles__text {
  color: var(--ink-soft);
  max-width: 64ch;
}
@media (min-width: 64rem) {
  .principles__item {
    grid-template-columns: 4rem minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
    gap: var(--space-6);
  }
  .principles__item::before {
    grid-row: auto;
  }
  .principles__text {
    margin: 0;
  }
}

/* ---------- FAQ ---------- */
.faq {
  display: grid;
  border-top: 1px solid var(--line-strong);
  max-width: 54rem;
}
.faq__item {
  border-bottom: 1px solid var(--line);
}
.faq__question {
  position: relative;
  display: block;
  padding: var(--space-5) 3rem var(--space-5) 0;
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.3;
  cursor: pointer;
  list-style: none;
}
.faq__question::-webkit-details-marker {
  display: none;
}
.faq__question::after {
  content: '';
  position: absolute;
  right: 0.5rem;
  top: 50%;
  width: 0.65rem;
  height: 0.65rem;
  border-right: 2px solid var(--accent-deep);
  border-bottom: 2px solid var(--accent-deep);
  transform: translateY(-70%) rotate(45deg);
  transition: transform 0.3s var(--ease);
}
.faq__item[open] .faq__question::after {
  transform: translateY(-30%) rotate(-135deg);
}
.faq__question:hover {
  color: var(--accent-deep);
}
.faq__question:focus-visible {
  outline-offset: -2px;
}
.faq__answer {
  padding: 0 0 var(--space-5);
  max-width: 64ch;
  color: var(--ink-soft);
}

/* ---------- контакт ---------- */
.section--contact {
  background: var(--ink);
  color: var(--on-dark);
  border-bottom: 0;
}
.contact {
  display: grid;
  gap: var(--space-8);
}
.contact__intro {
  display: grid;
  gap: var(--space-5);
  align-content: start;
}
.contact__title {
  font-size: var(--text-display);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 0.98;
}
.contact__lead {
  font-size: var(--text-lg);
  color: var(--on-dark-muted);
  max-width: 48ch;
}
.contact__direct {
  display: grid;
  gap: var(--space-3);
  padding-top: var(--space-5);
  border-top: 1px solid var(--dark-line);
}
.contact__direct-label {
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--on-dark-muted);
}
.contact__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.contact__buttons:empty {
  display: none;
}
.contact__pending {
  color: var(--on-dark-muted);
  max-width: 48ch;
}

.form {
  display: grid;
  gap: var(--space-5);
  padding: clamp(1.25rem, 1rem + 2vw, 2.5rem);
  background: var(--paper);
  color: var(--ink);
  border-radius: var(--radius-lg);
}
.form__title {
  font-size: var(--text-xl);
}
.form__grid {
  display: grid;
  gap: var(--space-4);
}
.field {
  display: grid;
  gap: 0.4rem;
}
.field__label {
  font-size: var(--text-sm);
  font-weight: 600;
}
.field__req {
  color: var(--accent-deep);
}
.field__input {
  width: 100%;
  min-height: 3rem;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  font: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.field__input::placeholder {
  color: #6f6a60;
}
.field__input:hover {
  border-color: var(--ink-soft);
}
.field__input:focus-visible {
  outline: none;
  border-color: var(--ink);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.field__input[aria-invalid='true'] {
  border-color: var(--accent-deep);
}
.field__select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%23171511' stroke-width='1.6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.9rem center;
  padding-right: 2.5rem;
}
.field__textarea {
  resize: vertical;
  min-height: 8rem;
}
.field--check {
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 0.75rem;
}
.field__checkbox {
  width: 1.2rem;
  height: 1.2rem;
  margin: 0.15rem 0 0;
  accent-color: var(--accent-deep);
}
.field__label--check {
  font-weight: 500;
  line-height: 1.5;
}
.form__notice {
  font-size: var(--text-sm);
  color: var(--muted);
}
.form__actions {
  display: grid;
  gap: var(--space-3);
}
.form__status {
  min-height: 1.5rem;
  font-weight: 600;
}
.form__status:empty {
  display: none;
}
.form__status--error {
  color: var(--accent-deep);
}
.form__status--success {
  color: #1f6b3a;
}
.form--disabled .form__grid,
.form--disabled .form__notice,
.form--disabled .form__actions {
  display: none;
}
.form__disabled-note {
  padding: var(--space-4);
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  color: var(--ink-soft);
}

@media (min-width: 48rem) {
  .form__grid {
    grid-template-columns: 1fr 1fr;
  }
  .field--full {
    grid-column: 1 / -1;
  }
  .form__actions {
    grid-template-columns: auto 1fr;
    align-items: center;
  }
}
@media (min-width: 64rem) {
  .contact {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: clamp(3rem, 6vw, 6rem);
    align-items: start;
  }
  .contact__intro {
    position: sticky;
    top: calc(var(--header-h) + 2rem);
  }
}

/* ---------- подвал ---------- */
.site-footer {
  background: var(--ink);
  color: var(--on-dark);
  border-top: 1px solid var(--dark-line);
  padding-block: var(--space-7) var(--space-6);
}
.site-footer__inner {
  display: grid;
  gap: var(--space-6);
}
.site-footer__brand {
  display: grid;
  gap: var(--space-3);
}
.site-footer__tagline {
  color: var(--on-dark-muted);
  max-width: 32ch;
}
.site-footer__nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
}
.site-footer__nav a,
.site-footer__meta a {
  text-decoration: none;
  color: var(--on-dark-muted);
}
.site-footer__nav a:hover,
.site-footer__meta a:hover {
  color: var(--on-dark);
  text-decoration: underline;
  text-decoration-color: var(--accent);
}
.site-footer__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  padding-top: var(--space-5);
  border-top: 1px solid var(--dark-line);
  font-size: var(--text-sm);
  color: var(--on-dark-muted);
}
@media (min-width: 48rem) {
  .site-footer__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
  }
  .site-footer__meta {
    grid-column: 1 / -1;
  }
}

/* ---------- документные страницы ---------- */
.doc {
  padding-block: clamp(3rem, 2rem + 4vw, 6rem);
  max-width: 46rem;
}
.doc__head {
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-7);
}
.doc__title {
  font-size: var(--text-2xl);
}
.doc__lead {
  font-size: var(--text-lg);
  color: var(--ink-soft);
}
.doc__section {
  display: grid;
  gap: var(--space-3);
  padding-block: var(--space-5);
  border-top: 1px solid var(--line);
}
.doc__section h2 {
  font-size: var(--text-lg);
}
.doc__section p,
.doc__section li {
  color: var(--ink-soft);
}
.doc__back {
  margin-top: var(--space-6);
}
.page-doc .contact__pending {
  color: var(--muted);
}
.page-doc main {
  min-height: 60vh;
}

/* ---------- движение ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    transition-delay: 0s !important;
  }
  .js [data-animate] .ladder__node,
  .js [data-animate] .step {
    opacity: 1;
    transform: none;
  }
  .js .ladder[data-animate]::before {
    transform: none;
  }
}

@media print {
  .site-header,
  .hero__actions,
  .chips,
  .form,
  .site-footer__nav {
    display: none;
  }
  body {
    background: #fff;
  }
}