/* ==================== Переменные ================================ */
:root {
  --color-dark: oklch(0.25 0.0058 271.18);
  --color-gray: oklch(0.3 0.0055 301.2);
  --color-blue: oklch(0.48 0.1394 258.07);
  --color-green: oklch(0.73 0.1111 182.32);
  --color-emerald: oklch(0.8799 0.21 156.86);
  --color-light: oklch(1 0 0);

  /* Шрифты */
  --font-main: 'Montserrat', sans-serif;
  --font-size-base: clamp(1rem, 0.955rem + 0.23vw, 1.125rem);

  /* Паддинги и отступы */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;

  /* Максимальная ширина контейнера */
  --max-width: min(65rem, 100% - 3rem);
}

/* ==================== Сброс и базовые стили ==================== */
*,
::before,
::after {
  margin: 0;
  padding: 0;
  border: 0;
  box-sizing: border-box;
}

html,
body {
  color-scheme: dark;
  height: 100%;
  line-height: 1.6;
  font-size: var(--font-size-base);
  font-weight: normal;
  background-color: var(--color-dark);
  color: var(--color-light);
  font-family: var(--font-main);
  scroll-behavior: smooth;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-size: inherit;
  font-weight: inherit;
  overflow-wrap: break-word;
  text-wrap: balance;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

a:focus-visible {
  outline: 2px solid var(--color-green);
  outline-offset: 2px;
}

ul, ol, li {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ==================== Общие стили ==================== */
.wrapper {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main {
  flex: 1 1 auto;
}

.section__container {
  position: relative;
  width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.divider {
  margin: var(--spacing-xl) 0;
  width: 100%;
  border: none;
  height: 2px;
  background-color: #4d4e51;
}

/* ==================== Header ==================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--color-dark);
  border-bottom: 1px solid var(--color-green);
}

.header__body {
  display: flex;
  flex-direction: column;
  width: var(--max-width);
  margin-inline: auto;
  padding: var(--spacing-xs);
  min-height: 120px;
}

.header__contacts {
  order: 1;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding-bottom: var(--spacing-xs);
  gap: var(--spacing-sm);
}

.header__contacts-list {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.header__contacts-list a,
.header__menu-list a {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  white-space: nowrap;
}

.header__contacts-list a:hover,
.header__menu-list a:hover {
  color: var(--color-green);
}

.header__inner {
  order: 2;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-sm);
}

.logo {
  font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem);
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--color-light);
}

/* Burger */
.burger {
  display: none;
  position: relative;
  width: 30px;
  height: 20px;
  cursor: pointer;
  background: transparent;
  border: none;
  padding: 0;
}

.burger span,
.burger::before,
.burger::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 2px;
  background-color: var(--color-light);
  transition: all 0.3s ease;
}

.burger::before { top: 0; }
.burger::after { bottom: 0; }
.burger span { top: 9px; }

.burger.active::before {
  transform: rotate(-45deg);
  top: 9px;
}

.burger.active::after {
  transform: rotate(45deg);
  bottom: 9px;
}

.burger.active span {
  transform: scale(0);
}

/* ==================== ГОРИЗОНТАЛЬНОЕ МЕНЮ НА ДЕСКТОПЕ ==================== */
.header__menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.header__menu-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--spacing-lg);
}

.header__link {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-light);
  transition: color 0.3s ease;
}

.header__link:hover {
  color: var(--color-green);
}

/* ==================== МОБИЛЬНАЯ ВЕРСИЯ: ВЕРТИКАЛЬНОЕ МЕНЮ ==================== */
@media (max-width: 1140px) {
  .burger {
    display: block;
  }

  /* Скрываем горизонтальное меню на мобильных */
  .header__menu {
    position: fixed;
    top: 120px;
    left: 0;
    width: 100%;
    height: calc(100vh - 120px);
    background-color: var(--color-dark);
    padding: var(--spacing-lg);
    transform: translateX(-100%);
    transition: transform 0.4s ease;
    z-index: 999;
    backdrop-filter: blur(10px);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-lg);
    overflow-y: auto;
  }

  .header__menu.active {
    transform: translateX(0);
  }

  .header__menu::before {
    content: '';
    position: fixed;
    top: 120px;
    left: 0;
    width: 100%;
    height: calc(100vh - 120px);
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease;
    z-index: 998;
  }

  .header__menu.active::before {
    opacity: 1;
    visibility: visible;
  }

  .header__menu-list {
    flex-direction: column;
    width: 100%;
  }

  .header__menu-list li {
    width: 100%;
    margin-bottom: var(--spacing-xs);
  }

  .header__contacts {
    justify-content: center;
    padding-bottom: var(--spacing-xs);
  }

  .header__contacts-list {
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
  }
}

@media (max-width: 480px) {
  .header__menu-list {
    font-size: 1.1rem;
    gap: var(--spacing-sm);
  }

  .header__contacts-list {
    font-size: 0.85rem;
  }

  .logo {
    font-size: 1.5rem;
  }
}

/* Burger */
.burger {
  display: none;
  position: relative;
  width: 30px;
  height: 20px;
  cursor: pointer;
  background: transparent;
  border: none;
  padding: 0;
}

.burger span,
.burger::before,
.burger::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 2px;
  background-color: var(--color-light);
  transition: all 0.3s ease;
}

.burger::before { top: 0; }
.burger::after { bottom: 0; }
.burger span { top: 9px; }

.burger.active::before {
  transform: rotate(-45deg);
  top: 9px;
}

.burger.active::after {
  transform: rotate(45deg);
  bottom: 9px;
}

.burger.active span {
  transform: scale(0);
}

/* Mobile Menu */
@media (max-width: 1140px) {
  .burger {
    display: block;
  }

  .header__menu {
    position: fixed;
    top: 120px;
    left: 0;
    width: 100%;
    height: calc(100vh - 120px);
    background-color: var(--color-dark);
    padding: var(--spacing-lg);
    transform: translateX(-100%);
    transition: transform 0.4s ease;
    overflow-y: auto;
    z-index: 999;
    backdrop-filter: blur(10px);
  }

  .header__menu.active {
    transform: translateX(0);
  }

  .header__menu::before {
    content: '';
    position: fixed;
    top: 120px;
    left: 0;
    width: 100%;
    height: calc(100vh - 120px);
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease;
    z-index: 998;
  }

  .header__menu.active::before {
    opacity: 1;
    visibility: visible;
  }

  .header__contacts {
    justify-content: center;
    padding-bottom: var(--spacing-xs);
  }

  .header__contacts-list {
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
  }

  .header__menu-list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-lg);
    font-size: 1.2rem;
  }

  .header__menu-list li {
    width: 100%;
    margin-bottom: var(--spacing-xs);
  }
}

@media (max-width: 480px) {
  .header__menu-list {
    font-size: 1.1rem;
    gap: var(--spacing-sm);
  }

  .header__contacts-list {
    font-size: 0.85rem;
  }

  .logo {
    font-size: 1.5rem;
  }
}

/* ==================== Hero / Parallax ==================== */
.hero-section {
  position: relative;
  min-height: 75vh;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  padding: var(--spacing-xxl) var(--spacing-sm) var(--spacing-xl);
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.hero-section--parallax {
  background-image: url('../img/parallax-bg.jpg');
}

.hero-section--data {
  background-image: url('../img/data-bg.jpg');
}

.hero {
  width: 100%;
  max-width: 1200px;
  z-index: 2;
}

.hero__wrapper:first-child {
  display: flex;
  justify-content: flex-start;
  margin-bottom: var(--spacing-lg);
}

.hero__wrapper:last-child {
  position: relative;
  width: 100%;
  height: 300px;
  max-width: 1400px;
}

.hero__title {
  font-size: clamp(1.5rem, 1rem + 2vw, 3.5rem);
  font-weight: 500;
  line-height: 1.1;
  text-align: right;
  color: var(--color-light);
}

.hero__logo {
  width: 200px;
  position: absolute;
  top: 300px;
  right: 220px;
  z-index: 10;
  transition: transform 0.3s ease;
}

.parallax__info {
  position: absolute;
  bottom: -160px;
  left: 50%;
  transform: translateX(-50%);
  width: 90%;
  max-width: 100%;
  height: auto;
  z-index: 6;
  transition: transform 0.1s ease-out;
}

.parallax__info--text {
  bottom: -200px;
  z-index: 4;
}

@media (max-width: 768px) {
  .hero-section {
    padding: var(--spacing-xl) var(--spacing-sm) var(--spacing-md);
  }

  .hero__wrapper:first-child {
    justify-content: center;
  }

  .hero__title {
    text-align: center;
    font-size: clamp(2rem, 1.5rem + 4vw, 3.5rem);
  }

  .hero__wrapper:last-child {
    height: 400px;
    margin-top: auto;
  }

  .hero__logo {
    width: 120px;
    top: 100px;
    right: 20px;
  }

  .parallax__info,
  .parallax__info--text {
    bottom: -80px;
    width: 95%;
  }
}

@media (min-width: 769px) {
  .parallax__info,
  .parallax__info--text {
    width: 100%;
    max-width: none;
  }
}

/* ==================== Sections ==================== */
section {
  margin: var(--spacing-xl) 0;
  padding: 0 var(--spacing-sm);
}

.subtitle {
  font-size: 2rem;
  color: var(--color-light);
  margin: 0;
  text-align: center;
}

/* Columns */
.columns {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin: var(--spacing-md) 0;
}

.column--left {
  flex: 1 1 calc(30% - var(--spacing-md));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.column--right {
  flex: 1 1 calc(70% - var(--spacing-md));
}

.column {
  flex: 0 0 calc(50% - var(--spacing-md));
  text-align: center;
}

.column li {
  text-align: left;
}

.column p {
  margin-top: var(--spacing-xs);
  font-size: 0.95rem;
  text-align: left;
}

.col {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.col img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.col:nth-child(1),
.col:nth-child(3) {
  flex: 1;
}

.col:nth-child(2) {
  flex: 2;
}

/* Arrow */
.arrow-right {
  position: relative;
  width: 100%;
  height: 4px;
  background-color: #4d4e51;
  margin: var(--spacing-md) 0;
}

.arrow-right::after {
  content: '';
  position: absolute;
  top: -3px;
  right: -2px;
  width: 10px;
  height: 10px;
  border-top: 4px solid #4d4e51;
  border-right: 4px solid #4d4e51;
  transform: rotate(45deg);
}

/* Service Menu */
.service__menu {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-wrap: wrap;
  padding: var(--spacing-xs);
  background-color: #4d4e51;
  border-radius: 5px;
  width: 100%;
  margin: var(--spacing-md) 0;
}

.service__menu li {
  flex: 0 0 auto;
  padding: var(--spacing-xs) var(--spacing-sm);
  color: var(--color-light);
  font-weight: 500;
}