/* 
  PREMIUM autolines — базовый фундамент UI
  Никаких декоративных элементов, только техническая основа.
*/

/* ========== RESET / NORMALIZE (минимальный) ========== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  margin: 0;
  padding: 0;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
}

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

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  padding: 0;
  margin: 0;
}

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

h1,
h2,
h3,
h4,
h5,
h6,
p {
  margin: 0;
  font-weight: inherit;
}

/* ========== БАЗОВАЯ ТИПОГРАФИКА И ЦВЕТА ========== */

:root {
  /* Цвета */
  --color-bg-primary: #0b0b0b;
  --color-bg-secondary: #111111;
  --color-text-primary: #ffffff;
  --color-text-secondary: #cfcfcf;
  --color-text-muted: #9a9a9a;

  /* Типографика */
  --font-family-base: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.6;

  --heading-letter-spacing: 0.1em;
  --heading-weight: 500;

  /* Прочее */
  --transition-base: 0.4s ease;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* Базовые заголовки без визуальных эффектов */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: var(--heading-weight);
  letter-spacing: var(--heading-letter-spacing);
  text-transform: none;
}

/* Текстовые состояния */
.text-secondary {
  color: var(--color-text-secondary);
}

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

/* ========== БАЗОВАЯ СЕТКА И КОНТЕЙНЕРЫ ========== */

.page {
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: 24px;
}

.section {
  padding-block: 56px;
  content-visibility: auto;
  contain-intrinsic-size: auto 500px;
}

/* ========== HERO ========== */

.hero {
  display: flex;
  align-items: center;
  min-height: 80vh;
  max-height: 100vh;
  position: relative;
  background-color: var(--color-bg-primary);
  background-image: url("../images/hero.jpg");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
  /* Оптимизация для GPU */
  transform: translateZ(0);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-color: #000000;
  opacity: 0.7;
  pointer-events: none;
}

.hero-inner {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  position: relative;
}

.hero-content {
  max-width: 640px;
}

.hero-title {
  font-size: 40px;
  line-height: 1.2;
  letter-spacing: 0.08em;
  text-transform: none;
  font-weight: 500;
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 32px;
}

.hero-actions {
  display: inline-flex;
}

@media (max-width: 768px) {
  .hero {
    min-height: 70vh;
  }

  .hero::before {
    opacity: 0.75;
  }

  .hero-title {
    font-size: 28px;
    letter-spacing: 0.06em;
  }

  .hero-subtitle {
    font-size: 14px;
    margin-bottom: 24px;
  }
}

/* ========== TRUST INLINE ========== */

.trust-inline {
  background-color: var(--color-bg-primary);
}

.trust-inline-inner {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  column-gap: 32px;
  font-size: 14px;
}

.trust-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-inline: 16px;
  padding-block: 12px;
  border-right: 1px solid rgba(255, 255, 255, 0.24);
}

.trust-item:last-child {
  border-right-color: transparent;
}

.trust-accent {
  text-transform: uppercase;
  font-size: 15px;
  letter-spacing: 0.14em;
  font-weight: 600;
  position: relative;
}

.trust-accent::after {
  content: "";
  position: relative;
  display: block;
  margin-top: 6px;
  width: 28px;
  height: 1px;
  background-color: rgba(255, 255, 255, 0.3);
}

.trust-desc {
  font-size: 13px;
  opacity: 0.8;
}

@media (max-width: 768px) {
  .trust-inline-inner {
    grid-template-columns: 1fr;
    row-gap: 8px;
    font-size: 13px;
  }

  .trust-item {
    border-right-color: transparent;
    padding-inline: 0;
  }
}

.section.trust-inline {
  padding-block: 64px;
}

/* ========== SELECTION FORM ========== */

.selection {
  background-color: var(--color-bg-primary);
}

.selection-inner {
  max-width: 960px;
}

.selection-body {
  display: flex;
  align-items: stretch;
  gap: 32px;
}

.selection-content {
  position: relative;
  z-index: 1;
  flex: 1.1;
  background-color: #111111;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 6px;
  padding: 32px;
}

.selection-header {
  margin-bottom: 32px;
}

.selection-title {
  font-size: 24px;
  line-height: 1.3;
  letter-spacing: 0.08em;
  font-weight: 500;
  margin-bottom: 12px;
}

.selection-subtitle {
  font-size: 14px;
}

.selection-form {
  margin-top: 8px;
}

.selection-form-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.selection-actions {
  margin-top: 24px;
}

.selection-error {
  margin-top: 12px;
  font-size: 13px;
  color: var(--color-text-muted);
}

/* Кнопка подбора — главный акцент блока */

.selection-actions .btn {
  padding-inline: 24px;
  padding-block: 12px;
  border-color: rgba(255, 255, 255, 0.3);
  background-color: rgba(255, 255, 255, 0.14);
}

.selection-actions .btn:hover {
  background-color: #ffffff;
  color: #111111;
  text-decoration: none;
  opacity: 1;
}

.selection-actions .btn:active {
  background-color: rgba(255, 255, 255, 0.9);
  color: #0b0b0b;
}

/* Единая анимация для всех основных кнопок */
.header-cta.btn:hover,
.hero-actions .btn:hover,
.contacts-actions .btn:hover {
  background-color: #ffffff;
  color: #111111;
  text-decoration: none;
  opacity: 1;
}

.header-cta.btn:active,
.hero-actions .btn:active,
.contacts-actions .btn:active {
  background-color: rgba(255, 255, 255, 0.9);
  color: #0b0b0b;
}

/* Линейные инпуты: нижняя граница, без рамки по периметру */

.form-control--line {
  border-radius: 0;
  border: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
  padding-inline: 0;
  padding-block: 8px;
  background-color: transparent;
}

.form-control--line:focus-visible {
  border-color: rgba(255, 255, 255, 0.4);
  background-color: transparent;
  opacity: 1;
}

@media (max-width: 768px) {
  .selection-inner {
    max-width: 100%;
  }

  .selection-body {
    flex-direction: column;
    gap: 24px;
  }
}

/* Визуальное сопровождение формы подбора */

.selection-media {
  position: relative;
  flex: 1;
  min-height: 260px;
  max-height: 600px;
  background-image: url("../images/select.jpg");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
  /* Оптимизация для GPU */
  transform: translateZ(0);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
}

.selection-media::before {
  content: "";
  position: absolute;
  inset: 0;
  background-color: #000000;
  opacity: 0.4;
}

@media (max-width: 768px) {
  .selection-media {
    display: none;
  }
}

/* ========== CATEGORIES ========== */

.categories {
  background-color: var(--color-bg-primary);
}

.categories-inner {
  max-width: 960px;
}

.categories-title {
  font-size: 24px;
  line-height: 1.3;
  letter-spacing: 0.08em;
  font-weight: 500;
  margin-bottom: 8px;
}

.categories-subtitle {
  font-size: 14px;
  margin-bottom: 28px;
}

.brands-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.brand-card {
  position: relative;
  background-color: transparent;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 6px;
  padding: 20px 16px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  transition: background-color 0.45s ease, border-color var(--transition-base);
  transform: translateZ(0);
  contain: layout style paint;
}

/* Стили для карточек-ссылок */
a.brand-card {
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.brand-logo-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 56px;
}

.brand-logo {
  max-width: 100%;
  max-height: 40px;
  object-fit: contain;
  opacity: 1;
  /* Оптимизация для GPU */
  transform: translateZ(0);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
}

.brand-name {
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.brand-card:hover {
  border-color: rgba(255, 255, 255, 0.35);
}

/* CTA карточка в сетке брендов */
.brand-card--cta {
  grid-column: span 2;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  text-decoration: none;
  color: inherit;
}

.brand-card-cta-content {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand-card-cta-title {
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-primary);
  font-weight: 500;
}

.brand-card-cta-subtitle {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
}

.brand-card-cta-arrow {
  font-size: 20px;
  color: var(--color-text-primary);
  transition: transform var(--transition-base);
}

.brand-card--cta:hover .brand-card-cta-arrow {
  transform: translateX(4px);
}

@media (max-width: 960px) {
  .brands-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .brand-card--cta {
    grid-column: span 1;
  }
}

@media (max-width: 768px) {
  .categories-inner {
    max-width: 100%;
  }

  .brands-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

/* ========== PROCESS ("КАК МЫ РАБОТАЕМ") ========== */

.process {
  background-color: var(--color-bg-primary);
}

.process-inner {
  max-width: 960px;
}

.process-layout {
  display: flex;
  align-items: stretch;
  gap: 40px;
}

.process-main {
  flex: 1.4;
}

.process-aside {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

.process-image {
  width: 300px;
  max-width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 6px;
  opacity: 0.95;
}

.process-title {
  font-size: 24px;
  line-height: 1.3;
  letter-spacing: 0.08em;
  font-weight: 500;
  margin-bottom: 32px;
}

.process-steps {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-left: 48px;
}

.process-steps::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background-color: rgba(255, 255, 255, 0.18);
}

.process-step {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 32px 0;
  padding-left: 0;
}

.process-step-number {
  font-size: 32px;
  font-weight: 300;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.25);
  min-width: 48px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.process-step-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 4px;
}

.process-step-title {
  font-size: 15px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--color-text-primary);
  font-weight: 500;
}

.process-step-desc {
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-text-secondary);
}

@media (max-width: 768px) {
  .process-inner {
    max-width: 100%;
  }

  .process-layout {
    flex-direction: column;
    gap: 24px;
  }

  .process-aside {
    display: none;
  }

  .process-steps {
    padding-left: 40px;
  }

  .process-steps::before {
    left: 0;
  }

  .process-step {
    gap: 20px;
    padding: 24px 0;
  }

  .process-step-number {
    font-size: 28px;
    min-width: 40px;
  }

  .process-step-title {
    font-size: 14px;
  }

  .process-step-desc {
    font-size: 12px;
  }
}

/* ========== ADVANTAGES ("ПОЧЕМУ К НАМ ОБРАЩАЮТСЯ") ========== */

.advantages {
  background-color: var(--color-bg-primary);
}

.advantages-inner {
  max-width: 960px;
}

.advantages-title {
  font-size: 24px;
  line-height: 1.3;
  letter-spacing: 0.08em;
  font-weight: 500;
  margin-bottom: 32px;
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 40px;
}

.advantage-item {
  padding: 18px 18px 16px;
  background-color: #0f0f0f;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 6px;
}

.advantage-title {
  font-size: 15px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  font-weight: 500;
  margin-bottom: 6px;
}

.advantage-desc {
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-text-secondary);
}

@media (max-width: 768px) {
  .advantages-inner {
    max-width: 100%;
  }

  .advantages-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

/* ========== CONTACTS ========== */

.contacts {
  background-color: var(--color-bg-primary);
}

.contacts-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.2fr);
  gap: 40px 64px;
  align-items: flex-start;
  max-width: 960px;
}

.contacts-title {
  font-size: 24px;
  line-height: 1.3;
  letter-spacing: 0.08em;
  font-weight: 500;
  margin-bottom: 24px;
}

.contacts-details {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

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

.contacts-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.contacts-value {
  font-size: 14px;
}

a.contacts-value {
  color: var(--color-text-primary);
  text-decoration: none;
  transition: opacity var(--transition-base);
}

a.contacts-value:hover {
  opacity: 0.8;
  text-decoration: underline;
}

.contacts-form-wrap {
  width: 100%;
}

.contacts-form {
  max-width: 420px;
  margin-left: auto;
}

.contacts-actions {
  margin-top: 20px;
}

@media (max-width: 768px) {
  .contacts-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    max-width: 100%;
  }

  .contacts-form {
    margin-left: 0;
    max-width: 100%;
  }
}




/* ========== БАЗОВЫЕ КНОПКИ ========== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding-inline: 18px;
  padding-block: 10px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background-color: rgba(255, 255, 255, 0.02);
  color: var(--color-text-primary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: opacity var(--transition-base),
    background-color var(--transition-base),
    color var(--transition-base), border-color var(--transition-base);
}

.btn:hover {
  opacity: 0.9;
  text-decoration: underline;
}

.btn:active {
  opacity: 0.8;
  background-color: rgba(255, 255, 255, 0.04);
}

.btn:disabled {
  opacity: 0.4;
  cursor: default;
}

/* Варианты кнопок (без ярких цветов) */

.btn--primary {
  background-color: rgba(255, 255, 255, 0.06);
}

.btn--ghost {
  background-color: transparent;
  border-color: rgba(255, 255, 255, 0.22);
}

/* ========== БАЗОВЫЕ ФОРМЫ ========== */

.form {
  width: 100%;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.form-label {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.form-control {
  width: 100%;
  padding-inline: 12px;
  padding-block: 10px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background-color: rgba(255, 255, 255, 0.02);
  color: var(--color-text-primary);
  outline: none;
  transition: border-color var(--transition-base),
    background-color var(--transition-base),
    opacity var(--transition-base);
}

.form-control::placeholder {
  color: var(--color-text-muted);
}

.form-control:focus-visible {
  border-color: rgba(255, 255, 255, 0.32);
  background-color: rgba(255, 255, 255, 0.04);
  opacity: 1;
}

.form-helper {
  font-size: 12px;
  color: var(--color-text-muted);
}

.form-error {
  font-size: 12px;
  color: #ff6b6b;
}

/* ========== БАЗОВЫЕ СТРУКТУРНЫЕ ЭЛЕМЕНТЫ ========== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background-color: transparent;
  transition: background-color var(--transition-base),
    border-color var(--transition-base), opacity var(--transition-base);
  border-bottom: 1px solid transparent;
}

.site-header--scrolled {
  background-color: rgba(0, 0, 0, 0.9);
  border-bottom-color: rgba(255, 255, 255, 0.08);
}

.site-footer {
  background-color: #000000;
  color: var(--color-text-secondary);
}

.site-main {
  background-color: var(--color-bg-primary);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 32px;
  padding-block: 20px;
  font-size: 12px;
}

.footer-main {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-brand-name {
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer-contacts {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-contacts-row {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-label {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer-value {
  font-size: 12px;
}

a.footer-value {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: opacity var(--transition-base);
}

a.footer-value:hover {
  opacity: 0.8;
  text-decoration: underline;
}

.footer-copy {
  margin-left: auto;
}

@media (max-width: 768px) {
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-copy {
    margin-left: 0;
  }
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 80px;
  gap: 32px;
}

.site-header--compressed .header-inner {
  min-height: 64px;
}

/* ========== HEADER: ЛОГОТИП ========== */

.header-logo {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  text-decoration: none;
  color: var(--color-text-primary);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 14px;
}

.header-logo-primary {
  font-weight: 600;
}

.header-logo-secondary {
  font-weight: 500;
  color: var(--color-text-secondary);
}

/* ========== HEADER: НАВИГАЦИЯ ========== */

.header-nav {
  display: flex;
  align-items: center;
}

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

.header-nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: opacity var(--transition-base), color var(--transition-base);
}

.header-nav-link:hover {
  opacity: 0.9;
  text-decoration: underline;
  color: var(--color-text-primary);
}

.header-nav-link:active {
  opacity: 0.8;
}

/* ========== HEADER: CTA ========== */

.header-cta {
  white-space: nowrap;
}

/* ========== HEADER: БУРГЕР И МОБИЛЬНОЕ МЕНЮ ========== */

.header-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 32px;
  height: 32px;
  cursor: pointer;
}

.header-burger-line {
  height: 1px;
  width: 100%;
  background-color: var(--color-text-secondary);
  transition: opacity var(--transition-base);
}

.header-burger:hover .header-burger-line {
  opacity: 0.9;
}

.header-burger:active .header-burger-line {
  opacity: 0.7;
}

/* ========== ADAPTIVE ========== */

@media (max-width: 768px) {
  .header-inner {
    min-height: 64px;
    gap: 16px;
  }

  .header-burger {
    display: inline-flex;
  }

  .header-nav {
    position: absolute;
    inset-inline: 0;
    top: 100%;
    background-color: rgba(0, 0, 0, 0.96);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
  }

  .header-nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 16px 24px;
  }

  .site-header.is-open .header-nav {
    opacity: 1;
    pointer-events: auto;
  }

  .header-cta {
    display: none;
  }
}

/* ========== БАЗОВЫЕ АНИМАЦИОННЫЕ СОСТОЯНИЯ ========== */

.fade-in-up {
  opacity: 0;
  transform: translateY(16px) translateZ(0);
  transition: opacity var(--transition-base),
    transform var(--transition-base);
  will-change: opacity, transform;
}

.fade-in-up.is-visible {
  opacity: 1;
  transform: translateY(0) translateZ(0);
  will-change: auto;
}