/* =============================================================================
   letters-web · дизайн-система
   Flat, ультра-современный стиль в лёгком «воздушном» исполнении:
   сплошные цветные блоки и плоские границы, мягкая «жёсткая» тень без
   размытия, крупная типографика, много воздуха, мягкая (слабо-насыщенная)
   палитра с пониженным контрастом границ, текста и акцентов.
   Без градиентов, без блюра/стекла, без размытых теней.
   ============================================================================= */

/* ------------------------------------------------------------------
   Токены
   ------------------------------------------------------------------ */
:root {
  /* Поверхности */
  --bg: #f7f7f2;
  --surface: #ffffff;
  --dark: #23262d;
  --dark-ink: #f5f4ef;

  /* Текст и линии */
  --ink: #2b2e35;
  --ink-soft: #636871;
  --line: #e9e7df;
  --line-strong: #dbd8cf;

  /* Флэт-палитра (мягче, с пониженной насыщенностью) */
  --blue: #4a6cf2;
  --blue-soft: #eaeeff;
  --sun: #ffca55;
  --sun-deep: #916512;
  --sun-soft: #fff4d8;
  --coral: #ff7d6c;
  --coral-deep: #d95a4a;
  --coral-soft: #ffece8;
  --mint: #3cb58a;
  --mint-deep: #2a8a64;
  --mint-soft: #e4f6ef;

  /* Типографика */
  --font-body: 'Golos Text', 'Segoe UI', system-ui, sans-serif;
  --font-display: 'Montserrat', 'Golos Text', 'Segoe UI', system-ui, sans-serif;

  /* Геометрия */
  --r-sm: 12px;
  --r-md: 20px;
  --r-lg: 28px;
  --r-pill: 999px;

  /* Тень: «жёсткая» (без размытия), но в приглушённом сером тоне —
     сохраняет плоскую геометрию и заметно снижает контраст */
  --shadow-color: rgba(43, 46, 53, 0.16);
  --shadow-hard: 10px 10px 0 0 var(--shadow-color);
}

/* ------------------------------------------------------------------
   Базовые правила
   ------------------------------------------------------------------ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

ul {
  list-style: none;
}

a {
  color: inherit;
}

::selection {
  background: var(--sun);
  color: var(--ink);
}

:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 3px;
  border-radius: 4px;
}

.section--dark :focus-visible {
  outline-color: var(--sun);
}

.icon {
  width: 24px;
  height: 24px;
  flex: none;
}

.icon--sm {
  width: 18px;
  height: 18px;
}

/* ------------------------------------------------------------------
   Раскладка
   ------------------------------------------------------------------ */
.container {
  width: min(1160px, 100%);
  margin-inline: auto;
  padding-inline: 24px;
}

.section {
  padding: 104px 0;
}

.section--surface {
  background: var(--surface);
  border-block: 1.5px solid var(--line);
}

.section--dark {
  background: var(--dark);
  color: var(--dark-ink);
}

.section-head {
  max-width: 660px;
  margin-bottom: 60px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.eyebrow::before {
  content: '';
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--blue);
}

.eyebrow--sun::before {
  background: var(--sun);
}

.eyebrow--coral::before {
  background: var(--coral);
}

.section--dark .eyebrow {
  color: rgba(245, 244, 239, 0.65);
}

.section--dark .eyebrow::before {
  background: var(--sun);
}

h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 3.2vw, 2.7rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-top: 14px;
}

.lead {
  margin-top: 16px;
  font-size: 1.125rem;
  line-height: 1.65;
  color: var(--ink-soft);
}

.section--dark .lead {
  color: rgba(245, 244, 239, 0.75);
}

/* ------------------------------------------------------------------
   Кнопки
   ------------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 26px;
  border: 2px solid transparent;
  border-radius: var(--r-pill);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  line-height: 1.1;
  text-decoration: none;
  cursor: pointer;
  transition:
    transform 0.15s ease,
    box-shadow 0.15s ease,
    background-color 0.15s ease,
    color 0.15s ease,
    border-color 0.15s ease;
}

.btn--sm {
  padding: 10px 18px;
  font-size: 0.88rem;
}

.btn--primary {
  background: var(--blue);
  border-color: var(--ink);
  color: #fff;
}

.btn--primary:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 0 var(--shadow-color);
}

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

.btn--ghost:hover {
  background: var(--sun-soft);
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 0 var(--shadow-color);
}

.btn--onblue {
  background: #fff;
  color: var(--ink);
}

.btn--onblue:hover {
  background: var(--sun);
  transform: translate(-2px, -2px);
}

.btn--onblue-ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.65);
  color: #fff;
}

.btn--onblue-ghost:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: #fff;
}

/* ------------------------------------------------------------------
   Шапка
   ------------------------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg);
  border-bottom: 1.5px solid var(--line);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 78px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex: none;
}

.brand__mark {
  width: 40px;
  height: 40px;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.12rem;
  letter-spacing: -0.015em;
  line-height: 1.1;
}

.brand__name span {
  color: var(--blue);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 46px;
  height: 46px;
  background: var(--surface);
  border: 2px solid var(--ink);
  border-radius: var(--r-sm);
  cursor: pointer;
  flex: none;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.menu-toggle[aria-expanded='true'] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded='true'] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded='true'] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav__list a {
  display: inline-block;
  padding: 10px 16px;
  border-radius: var(--r-pill);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--ink-soft);
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.nav__list a:hover {
  background: rgba(43, 46, 53, 0.06);
  color: var(--ink);
}

.nav__list a.is-active {
  background: var(--ink);
  color: #fff;
}

.nav__cta {
  flex: none;
}

/* ------------------------------------------------------------------
   Hero
   ------------------------------------------------------------------ */
.hero {
  position: relative;
  overflow: hidden;
  padding: 92px 0 108px;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--line-strong) 1.5px, transparent 1.5px);
  background-size: 26px 26px;
  opacity: 0.35;
  pointer-events: none;
}

.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.hero__pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  background: var(--surface);
  border: 1.5px solid var(--ink);
  border-radius: var(--r-pill);
  font-weight: 600;
  font-size: 0.9rem;
}

.hero__pill-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--blue);
}

.hero h1 {
  margin: 22px 0 24px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.6rem, 4.6vw + 1.2rem, 4.6rem);
  line-height: 1.03;
  letter-spacing: -0.03em;
}

.mark {
  display: inline-block;
  padding: 0.02em 0.16em 0.07em;
  background: var(--sun);
  border-radius: 12px;
  transform: rotate(-1.4deg);
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.hero__lead {
  max-width: 54ch;
  font-size: 1.2rem;
  line-height: 1.65;
  color: var(--ink-soft);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 30px;
}

.hero__apk {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-decoration-thickness: 2px;
  text-underline-offset: 5px;
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

.hero__apk:hover {
  color: var(--blue);
  text-decoration-color: var(--blue);
}

.hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 28px;
}

.hero__trust li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.hero__trust .icon--sm {
  color: var(--mint-deep);
}

.hero__visual {
  position: relative;
  z-index: 0;
}

.hero__deco {
  position: absolute;
  pointer-events: none;
  z-index: -1;
}

.hero__deco--circle {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: var(--sun);
  top: -38px;
  right: -30px;
}

.hero__deco--ring {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 7px solid var(--blue);
  bottom: -26px;
  left: -34px;
}

.hero__deco--plus {
  width: 26px;
  height: 26px;
  top: -62px;
  left: 16%;
  background:
    linear-gradient(var(--coral), var(--coral)) center / 100% 9px no-repeat,
    linear-gradient(var(--coral), var(--coral)) center / 9px 100% no-repeat;
}

/* Панель-клавиатура: плоская карточка с «жёсткой» тенью */
.keyboard-panel {
  position: relative;
  max-width: 480px;
  margin-left: auto;
  padding: 26px;
  background: var(--surface);
  border: 2px solid var(--ink);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-hard);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.keyboard-panel:hover {
  transform: translate(-4px, -4px);
  box-shadow: 14px 14px 0 0 var(--shadow-color);
}

.keyboard-panel__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 18px;
  margin-bottom: 20px;
  border-bottom: 1.5px solid var(--line);
}

.keyboard-panel__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--r-sm);
  background: var(--blue-soft);
  color: var(--blue);
  display: grid;
  place-items: center;
}

.keyboard-panel__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
}

.keyboard {
  display: grid;
  gap: 10px;
}

.keyboard__row {
  display: flex;
  gap: 10px;
}

.key {
  flex: 1 1 0;
  max-width: 68px;
  aspect-ratio: 1.12 / 1;
  display: grid;
  place-items: center;
  background: var(--bg);
  border: 1.5px solid var(--line-strong);
  border-radius: var(--r-sm);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1rem, 2.4vw, 1.2rem);
}

.key--space {
  max-width: none;
  aspect-ratio: auto;
  height: 42px;
  border-color: var(--line);
}

/* Цветные клавиши — решение загадки: УЧИМ */
.key--alt-u {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}

.key--alt-i {
  background: var(--sun);
  border-color: var(--sun);
  color: var(--ink);
}

.key--alt-m {
  background: var(--coral);
  border-color: var(--coral);
  color: #fff;
}

.key--alt-c {
  background: var(--mint);
  border-color: var(--mint);
  color: #fff;
}

.hero__secret {
  max-width: 480px;
  margin: 20px 0 0 auto;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.hero__secret::before {
  content: '';
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 3px;
  background: var(--coral);
  margin-right: 10px;
  vertical-align: 1px;
}

/* ------------------------------------------------------------------
   Карточки
   ------------------------------------------------------------------ */
.cards {
  display: grid;
  gap: 24px;
}

.cards--audience {
  grid-template-columns: repeat(3, 1fr);
}

.cards--features {
  grid-template-columns: repeat(3, 1fr);
}

.card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 28px 26px;
  background: var(--surface);
  border: 1.5px solid var(--line);
  border-radius: var(--r-md);
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.section--surface .card {
  background: var(--bg);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--ink);
}

.card__icon {
  width: 52px;
  height: 52px;
  border-radius: var(--r-sm);
  display: grid;
  place-items: center;
}

.card__icon--blue {
  background: var(--blue-soft);
  color: var(--blue);
}

.card__icon--sun {
  background: var(--sun-soft);
  color: var(--sun-deep);
}

.card__icon--mint {
  background: var(--mint-soft);
  color: var(--mint-deep);
}

.card__icon--coral {
  background: var(--coral-soft);
  color: var(--coral-deep);
}

.card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.card p {
  font-size: 0.98rem;
  line-height: 1.62;
  color: var(--ink-soft);
}

/* ------------------------------------------------------------------
   Секция «Скачать» (тёмный плоский блок)
   ------------------------------------------------------------------ */
.download-panel {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: start;
}

.panel-lead {
  font-size: 1.05rem;
  line-height: 1.7;
  color: rgba(245, 244, 239, 0.78);
}

.req-title {
  margin: 30px 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: rgba(245, 244, 239, 0.55);
}

.req-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 0.98rem;
  color: rgba(245, 244, 239, 0.85);
}

.req-list .req-chip {
  width: 26px;
  height: 26px;
  flex: none;
  border-radius: 8px;
  background: rgba(255, 197, 61, 0.16);
  display: grid;
  place-items: center;
  color: var(--sun);
}

.req-list .req-chip .icon--sm {
  width: 14px;
  height: 14px;
}

.stores {
  display: grid;
  gap: 14px;
}

.store {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  background: var(--surface);
  color: var(--ink);
  border-radius: var(--r-md);
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.store:hover {
  transform: translate(-3px, -3px);
  box-shadow: 6px 6px 0 0 var(--sun);
}

.store__icon {
  width: 46px;
  height: 46px;
  flex: none;
  border-radius: 13px;
  display: grid;
  place-items: center;
}

.store__icon--rustore {
  background: var(--blue-soft);
  color: var(--blue);
}

.store__icon--nashstore {
  background: var(--coral-soft);
  color: var(--coral-deep);
}

.store__icon--apk {
  background: var(--sun-soft);
  color: var(--sun-deep);
}

.store__text {
  display: flex;
  flex-direction: column;
}

.store__label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
}

.store__note {
  margin-top: 3px;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.store__arrow {
  width: 38px;
  height: 38px;
  flex: none;
  margin-left: auto;
  border: 1.5px solid var(--line-strong);
  border-radius: 50%;
  background: var(--bg);
  color: var(--ink);
  display: grid;
  place-items: center;
  transition: background-color 0.15s ease, color 0.15s ease,
    border-color 0.15s ease, transform 0.15s ease;
}

.store__arrow .icon {
  width: 18px;
  height: 18px;
}

.store:hover .store__arrow {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
  transform: translateX(2px);
}

/* ------------------------------------------------------------------
   Страница «О приложении»
   ------------------------------------------------------------------ */
.page-head {
  padding: 84px 0 56px;
}

.page-head h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 4.2vw + 1rem, 4rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-top: 14px;
}

.facts-panel {
  margin-top: 40px;
  background: var(--surface);
  border: 2px solid var(--ink);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-hard);
}

.facts-panel__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 24px;
  border-bottom: 1.5px solid var(--line);
}

.facts-panel__icon {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: var(--sun-soft);
  color: var(--sun-deep);
  display: grid;
  place-items: center;
}

.facts-panel__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
}

.facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.facts__row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 24px;
}

.facts__row:nth-child(odd) {
  border-right: 1.5px solid var(--line);
}

.facts__row:nth-child(-n + 4) {
  border-bottom: 1.5px solid var(--line);
}

.facts dt {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.facts dd {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
}

.law-list {
  display: grid;
  gap: 60px;
}

.law-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 28px;
}

.law-item__num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.6rem;
  line-height: 1;
}

.law-item:nth-child(1) .law-item__num {
  color: var(--blue);
}

.law-item:nth-child(2) .law-item__num {
  color: var(--sun-deep);
}

.law-item:nth-child(3) .law-item__num {
  color: var(--coral-deep);
}

.law-item h2 {
  font-size: clamp(1.5rem, 2.4vw, 1.9rem);
  margin: 6px 0 18px;
}

.law-item p {
  max-width: 68ch;
  font-size: 1.02rem;
  line-height: 1.72;
  color: var(--ink-soft);
}

.law-item p + p {
  margin-top: 14px;
}

.license-box {
  padding: 24px 26px;
  background: var(--sun-soft);
  border: 1.5px solid var(--line-strong);
  border-radius: var(--r-md);
}

.license-box p {
  color: var(--ink);
  max-width: 72ch;
}

.author-card {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 26px;
  background: var(--surface);
  border: 1.5px solid var(--line);
  border-radius: var(--r-md);
  max-width: 640px;
}

.author-card__mark {
  width: 58px;
  height: 58px;
  flex: none;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: var(--sun);
  border-radius: var(--r-sm);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.5rem;
}

.author-card__name {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.author-card p {
  font-size: 0.98rem;
  max-width: 56ch;
}

.author-card__contact {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--blue);
  text-decoration: none;
  border-bottom: 2px solid var(--blue-soft);
  transition: border-color 0.15s ease;
}

.author-card__contact:hover {
  border-color: var(--blue);
}

/* CTA-полоса (плоский синий блок) */
.cta-strip {
  margin-top: 80px;
  padding: 56px;
  background: var(--blue);
  border-radius: var(--r-lg);
  text-align: center;
  color: #fff;
}

.cta-strip h2 {
  color: #fff;
  margin-top: 0;
}

.cta-strip p {
  margin: 12px auto 0;
  max-width: 46ch;
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.85);
}

.cta-strip__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 30px;
}

/* ------------------------------------------------------------------
   Подвал
   ------------------------------------------------------------------ */
.site-footer {
  border-top: 1.5px solid var(--line);
  padding: 56px 0 40px;
  background: var(--bg);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
}

.footer__about {
  margin-top: 16px;
  max-width: 34ch;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.footer__title {
  margin-bottom: 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.footer__nav li,
.footer__contact li {
  margin-bottom: 10px;
}

.footer__nav a,
.footer__contact a {
  font-size: 0.95rem;
  color: var(--ink-soft);
  text-decoration: none;
  transition: color 0.15s ease;
}

.footer__nav a:hover,
.footer__contact a:hover {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
  color: var(--ink-soft);
}

/* ------------------------------------------------------------------
   Адаптивность
   ------------------------------------------------------------------ */
@media (max-width: 1020px) {
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 64px;
  }

  .hero__visual {
    max-width: 520px;
  }

  .keyboard-panel {
    margin-left: 0;
  }

  .hero__secret {
    margin-left: 0;
  }

  .download-panel {
    grid-template-columns: 1fr;
    gap: 44px;
  }

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

@media (max-width: 820px) {
  .menu-toggle {
    display: flex;
  }

  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: block;
    padding: 20px 24px 28px;
    background: var(--surface);
    border-bottom: 2px solid var(--ink);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
  }

  .nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .nav__list a {
    display: block;
    padding: 13px 12px;
    font-size: 1.12rem;
  }

  .nav__cta {
    width: 100%;
    margin-top: 18px;
  }
}

@media (max-width: 720px) {
  .section {
    padding: 76px 0;
  }

  .section-head {
    margin-bottom: 40px;
  }

  .hero {
    padding: 60px 0 72px;
  }

  .page-head {
    padding: 60px 0 44px;
  }

  .cards--audience,
  .cards--features {
    grid-template-columns: 1fr;
  }

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

  .facts__row:nth-child(odd) {
    border-right: none;
  }

  .facts__row:not(:last-child) {
    border-bottom: 1.5px solid var(--line);
  }

  .law-item {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .law-item__num {
    font-size: 2rem;
  }

  .cta-strip {
    margin-top: 56px;
    padding: 40px 26px;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero__deco--ring {
    display: none;
  }
}

@media (max-width: 460px) {
  .container {
    padding-inline: 20px;
  }

  .header__inner {
    height: 70px;
  }

  .brand__name {
    font-size: 1.02rem;
  }

  .hero__actions .btn {
    width: 100%;
  }

  .keyboard {
    gap: 8px;
  }

  .keyboard__row {
    gap: 8px;
  }

  .key {
    border-radius: 10px;
  }

  .keyboard-panel {
    padding: 20px;
    box-shadow: 8px 8px 0 0 var(--shadow-color);
  }
}

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

  *,
  *::before,
  *::after {
    transition: none !important;
  }

  .keyboard-panel:hover,
  .btn:hover,
  .store:hover,
  .card:hover {
    transform: none;
  }
}