@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap");

:root {
  --color-bg: #ffffff;
  --color-text: #101010;
  --color-muted: #6a6a6a;
  --color-border: #ededed;
  --color-card: #ffffff;
  --color-soft: #f6f6f6;
  --color-primary: #111111;
  --color-epn: #dfe6ff;
  --color-epn-strong: #b8b8ff;
  --color-sx: #dbe6ff;
  --color-dv: #7ea0ff;
  --shadow-soft: 0 10px 24px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 16px 36px rgba(0, 0, 0, 0.08);
  --radius-card: 20px;
  --radius-pill: 999px;
  --container-width: 1040px;
  --container-padding: 24px;
  --section-gap: 220px;
  --section-gap-desktop: 200px;
  --section-gap-tablet: 120px;
  --section-gap-mobile: 84px;
  --section-pad-desktop: 36px;
  --section-pad-mobile: 20px;
  --spacing-1: 8px;
  --spacing-2: 12px;
  --spacing-3: 16px;
  --spacing-4: 20px;
  --spacing-5: 24px;
  --spacing-6: 32px;
  --spacing-7: 40px;
  --spacing-8: 64px;
  --font-base: "Inter", sans-serif;
  --icon-logo: 36px;
  --icon-ui: 32px;
  --icon-arrow: 24px;
  --icon-back: 24px;
}

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

* {
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100%;
  overflow-x: hidden;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-base);
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
}

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

input,
button,
textarea,
select {
  font: inherit;
}

/* Layout */
.site-header,
.site-main,
.site-footer {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.site-main {
  display: flex;
  flex-direction: column;
  gap: var(--section-gap-desktop);
  padding-top: 96px;
  padding-bottom: var(--section-gap-desktop);
}

section {
  scroll-margin-top: 108px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 12;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-5);
  padding-top: 18px;
  padding-bottom: 18px;
  background: rgba(255, 255, 255, 0.86);
  /* border-bottom: 1px solid #f0f0f0; */
  backdrop-filter: blur(14px);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 100vw;
  height: 1px;
  background: #f0f0f0;
  transform: translateX(-50%);
}

.site-header__logo {
  width: var(--icon-logo);
  height: var(--icon-logo);
  border-radius: 50%;
  background: #111111;
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.08em;
}

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

.site-header__nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-5);
  margin-left: auto;
  margin-right: auto;
  padding: 0;
  background: transparent;
  border-radius: 0;
}

.site-header__menu {
  display: none;
}

.site-header__toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid #e6e6e6;
  border-radius: 12px;
  background: #ffffff;
  align-items: center;
  justify-content: center;
  gap: 5px;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.site-header__toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: #101010;
  border-radius: 999px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-header__link {
  color: #3a3a3a;
  font-weight: 500;
  padding: 0;
  border-radius: 0;
  transition: opacity 0.2s ease;
}

.site-header__link:hover {
  opacity: 0.7;
}

.site-header__cta {
  display: flex;
  align-items: center;
}

.site-header__nav--mobile,
.site-header__cta--mobile {
  display: none;
}

.site-header__backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(16, 16, 16, 0.45);
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  transition: opacity 0.22s ease-out;
  z-index: 10;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  font-weight: 500;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button--primary {
  background: #f2f2f2;
  border-color: #e6e6e6;
  color: #1a1a1a;
}

/* Hero */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
  gap: 84px;
  align-items: center;
  padding-top: var(--section-pad-desktop);
  padding-bottom: var(--section-pad-desktop);
}

.hero__label {
  color: var(--color-muted);
  font-size: 15px;
  text-transform: none;
  letter-spacing: 0.02em;
  margin-bottom: 18px;
}

.hero__title {
  font-size: 52px;
  font-weight: 700;
  line-height: 1.06;
  margin-bottom: 18px;
}

.hero__text {
  color: #5f5f5f;
  max-width: 480px;
  margin-bottom: 28px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-3);
}

.hero__action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  font-weight: 500;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.hero__action--primary {
  background: var(--color-primary);
  color: #ffffff;
}

.hero__action--secondary {
  border-color: #dcdcdc;
  color: #1a1a1a;
  background: #ffffff;
}

.hero__media {
  display: flex;
  justify-content: flex-end;
}

.hero__photo {
  width: 360px;
  aspect-ratio: 3 / 4;
  background: #ececec;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid #e3e3e3;
  box-shadow: var(--shadow-soft);
}

.hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* About */
.about {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-top: var(--section-pad-desktop);
  padding-bottom: var(--section-pad-desktop);
}

.about__title,
.about__text {
  text-align: center;
}

.about__title,
.cases__title,
.contacts__title {
  font-size: 44px;
  line-height: 1.15;
  font-weight: 700;
  margin-bottom: 10px;
}

.about__text {
  color: #606060;
  max-width: 640px;
  margin: 0 auto;
  font-size: 15px;
  margin-bottom: 32px;
}

.about__blocks {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--spacing-6);
}

.about__block {
  background: var(--color-soft);
  border-radius: var(--radius-card);
  padding: var(--spacing-5);
  border: 1px solid #eeeeee;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.04);
}

.about__block-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: var(--spacing-3);
}

.about__list {
  list-style: none;
  display: grid;
  gap: var(--spacing-2);
  counter-reset: about-item;
}

.about__list-item {
  position: relative;
  padding-left: 28px;
  color: #3a3a3a;
  font-size: 14px;
  counter-increment: about-item;
}

.about__list-item::before {
  content: counter(about-item);
  position: absolute;
  left: 0;
  top: 0.1em;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #e4e4e4;
  color: #5a5a5a;
  font-size: 11px;
  line-height: 18px;
  text-align: center;
}

/* Cases */
.cases {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-top: var(--section-pad-desktop);
  padding-bottom: var(--section-pad-desktop);
}

.cases__title,
.cases__text {
  text-align: center;
}

.cases__text {
  color: var(--color-muted);
  max-width: 640px;
  margin: 0 auto;
  font-size: 15px;
  margin-bottom: 32px;
}

.cases__list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--spacing-4);
}

.cases__item {
  background: var(--color-card);
  border-radius: var(--radius-card);
  border: 1px solid #ededed;
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  padding: 0 var(--spacing-4) var(--spacing-4);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cases__item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.cases__thumb {
  display: flex;
  align-items: center;
  justify-content: center;
  width: calc(100% + (var(--spacing-4) * 2));
  margin-left: calc(var(--spacing-4) * -1);
  margin-right: calc(var(--spacing-4) * -1);
  height: 122px;
  border-radius: var(--radius-card) var(--radius-card) 0 0;
  font-weight: 700;
  font-size: 28px;
  color: rgba(0, 0, 0, 0.2);
  margin-bottom: var(--spacing-4);
  letter-spacing: 0.08em;
}

.cases__thumb--epn {
  background: var(--color-epn);
}

.cases__item:nth-child(2) .cases__thumb--epn {
  background: var(--color-epn-strong);
}

.cases__thumb--sx {
  background: var(--color-sx);
}

.cases__thumb--dv {
  background: var(--color-dv);
}

.cases__item-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.cases__item-text {
  color: #707070;
  margin-bottom: 2px;
  font-size: 13px;
}

.cases__item-role {
  color: #3d3d3d;
  font-weight: 500;
  font-size: 13px;
}

/* Contacts */
.contacts {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-top: var(--section-pad-desktop);
  padding-bottom: var(--section-pad-desktop);
}

.contacts__title {
  text-align: center;
}

.contacts__text {
  text-align: center;
  color: var(--color-muted);
  max-width: 640px;
  margin: 0 auto;
  font-size: 15px;
  margin-bottom: 32px;
}

.contacts__cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--spacing-5);
}

.contacts__card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 84px;
  background: #f8f8f8;
  border-radius: 20px;
  border: 1px solid #efefef;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.04);
  padding: 18px 56px 18px 70px;
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

.contacts__label {
  font-size: 12px;
  color: #7a7a7a;
  margin-bottom: 4px;
}

.contacts__value {
  font-weight: 600;
  color: #1d1d1d;
}

.contacts__icon {
  position: absolute;
  left: 16px;
  top: 50%;
  width: var(--icon-logo);
  height: var(--icon-logo);
  border-radius: 12px;
  transform: translateY(-50%);
  background: #111111;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.contacts__icon-img {
  display: block;
  width: var(--icon-ui);
  height: var(--icon-ui);
  object-fit: contain;
}

.contacts__arrow {
  position: absolute;
  right: 18px;
  top: 50%;
  width: var(--icon-arrow);
  height: var(--icon-arrow);
  transform: translateY(-50%);
  border-radius: 50%;
  background: #e4e4e4;
  display: block;
  object-fit: contain;
  transition: transform 0.2s ease;
}

/* Footer */
.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-4);
  margin-top: 28px;
  padding-top: var(--spacing-5);
  padding-bottom: var(--spacing-5);
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
}

@media (hover: hover) and (pointer: fine) {
  .button:hover,
  .hero__action:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
  }

  .cases__item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
  }

  .contacts__card:hover {
    background: #fbfbfb;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.08);
  }

  .contacts__card:hover .contacts__arrow {
    transform: translateY(-50%) translateX(2px);
  }

  .site-header__link:hover {
    opacity: 0.7;
  }
}

@media (prefers-reduced-motion: reduce) {
  .button,
  .hero__action,
  .cases__item,
  .contacts__card,
  .contacts__card::after,
  .site-header__link {
    transition: none;
  }
}

/* Responsive */
@media (max-width: 1024px) {
  :root {
    --section-pad-desktop: 28px;
  }

  .site-main {
    gap: var(--section-gap-tablet);
    padding-top: 88px;
    padding-bottom: var(--section-gap-tablet);
  }

  section {
    scroll-margin-top: 100px;
  }

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

@media (max-width: 768px) {
  :root {
    --section-gap-mobile: 108px;
  }

  body.menu-open {
    overflow: hidden;
  }

  .site-header__toggle {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-left: auto;
    z-index: 12;
    gap: 6px;
  }

  .site-header__toggle span {
    width: 26px;
    height: 2px;
    border-radius: 999px;
    background: #111111;
  }
  body.menu-open .site-header__toggle span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
  }

  body.menu-open .site-header__toggle span:nth-child(2) {
    opacity: 0;
  }

  body.menu-open .site-header__toggle span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
  }

  .site-header__menu {
    display: flex;
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    bottom: 0;
    height: 100vh;
    height: 100dvh;
    width: 100vw;
    flex: 0 0 auto;
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-4);
    padding: 0;
    background: var(--color-bg);
    transform: translateX(100%);
    transition: transform 0.22s ease-out;
    z-index: 13;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    box-shadow: none;
    pointer-events: none;
  }

  body.menu-open .site-header__menu {
    transform: translateX(0);
  }

  .site-header__menu-inner {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-4);
    padding: 96px 20px 24px;
    pointer-events: auto;
  }

  .site-header__menu-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--color-bg);
    z-index: 14;
  }

  .site-header__close {
    position: relative;
    width: 44px;
    height: 44px;
    border: 1px solid #e6e6e6;
    border-radius: 12px;
    background: #ffffff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0;
  }

  .site-header__close span {
    position: absolute;
    width: 20px;
    height: 2px;
    background: #101010;
    border-radius: 999px;
  }

  .site-header__close span:nth-child(1) {
    transform: rotate(45deg);
  }

  .site-header__close span:nth-child(2) {
    transform: rotate(-45deg);
  }

  .site-header__backdrop {
    display: block;
  }

  body.menu-open .site-header__backdrop {
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
  }

  .site-header__nav--desktop {
    display: none;
  }

  .site-header__nav--mobile {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-3);
    margin: 0;
    width: 100%;
  }

  .site-header__link {
    font-size: 17px;
    padding: 10px 0;
    display: inline-flex;
    width: 100%;
  }

  .site-header__cta--desktop {
    display: none;
  }

  .site-header__cta--mobile {
    display: flex;
    width: 100%;
  }

  .site-header__cta--mobile .button {
    width: 100%;
    justify-content: center;
  }


  .site-main {
    gap: var(--section-gap-mobile);
    padding-bottom: var(--section-gap-mobile);
  }

  .site-footer {
    margin-top: 52px;
  }

  .about__title,
  .cases__title,
  .contacts__title {
    margin-bottom: 8px;
  }

  .about__text,
  .cases__text,
  .contacts__text {
    margin-bottom: 20px;
  }
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }

  .hero__media {
    justify-content: flex-start;
  }

  .hero__photo {
    width: 100%;
    max-width: 360px;
  }
}

@media (max-width: 640px) {
  :root {
    --section-gap: 84px;
    --section-pad-desktop: var(--section-pad-mobile);
  }

  .site-main {
    gap: var(--section-gap-mobile);
    padding-top: 76px;
    padding-bottom: var(--section-gap-mobile);
  }

  section {
    scroll-margin-top: 92px;
  }

  .hero__title {
    font-size: 36px;
  }

  .about__title,
  .cases__title,
  .contacts__title {
    font-size: 36px;
    margin-bottom: 8px;
  }

  .about__text,
  .cases__text,
  .contacts__text {
    margin-bottom: 20px;
  }

  .hero__text {
    max-width: 100%;
  }

  .hero__actions {
    flex-direction: column;
  }

  .hero__action {
    width: 100%;
  }

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

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

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

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}