:root {
  --base: #e1dfdd;
  --text: #000000;
  --grey: #b8b9bb;
}

@font-face {
  font-family: roman;
  src: url(/fonts/HelveticaNeueCyr-Roman.woff);
}

@font-face {
  font-family: medium;
  src: url(fonts/HelveticaNeueCyr-Medium.woff);
}

@font-face {
  font-family: bold;
  src: url(fonts/HelveticaNeueCyr-Bold.woff);
}

html,
body {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: roman;
  background-color: var(--base);
  color: var(--text);
  overflow-x: hidden;
  font-weight: normal;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

.spline-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 50;
  pointer-events: none;
  transition: 0.65s ease-out;
}

spline-viewer {
  position: sticky;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: 50;
}

.faded-spline {
  mix-blend-mode: overlay;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  text-transform: uppercase;
  font-weight: normal;
  line-height: 100%;
}

p {
  font-family: roman;
  font-size: 24px;
  line-height: 120%;
}

.section {
  padding: 0 6.25rem 0 6.25rem;
  width: 100%;
  height: 100vh;
  display: flex;
  margin-bottom: 12.5rem;

  transform-origin: top left;
  transition: transform 0.3s ease-out;
  will-change: transform;
  position: relative;
}

h1 {
  font-family: medium;
  text-transform: uppercase;
  font-size: 8rem;
  font-weight: normal;
  margin: 0;
}

nav {
  width: 100%;
  padding: 0 6.25rem 0 6.25rem;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: flex-start;

  position: fixed;
  top: 1.25rem;
  z-index: 1000;

  font-family: bold;
  text-decoration: none;
  color: var(--base);
  font-size: 22px;

  background: transparent;
  isolation: isolate;
  mix-blend-mode: difference;
  font-family: medium;
}

a {
  text-decoration: none;
  color: var(--text);
  cursor: none;
}

a:hover {
  text-decoration: underline;
  text-underline-offset: 10px;
}

nav a {
  color: var(--base);
}

/* 1st screen */

.hero {
  height: 100dvh;
  display: flex;
  padding: 12.5rem 6.25rem 7.8125rem 6.25rem;
}

.hero .left {
  height: 100%;
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hero .right {
  height: 100%;
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-end;
}

.hero h2 {
  font-family: roman;
  font-size: 32px;
  width: 305px;
  text-transform: uppercase;
}
.hero .right h1 {
  text-align: right;
}

.hero .language-container {
  display: flex;
  flex-direction: column;

  position: absolute;
  right: 6.25rem;
}

/* 2nd screen */

.sec-title {
  font-family: roman;
  font-size: 20px;
  text-transform: uppercase;
}

.sec2 {
  padding-right: 6.25rem;
  flex-direction: row;
  justify-content: space-between;
  z-index: 75;
}

.sec2_content {
  width: 65.625rem;
}

.sec2 h2 {
  font-family: medium;
  font-size: 40px;
  line-height: 120%;
}

.sec2 h2:first-of-type {
  margin-bottom: 3.125rem;
}

.sec2_paragraph {
  display: flex;
  justify-content: space-between;
  margin-top: 8rem;
}

.sec2_paragraph .left {
  width: 22.25rem;
}

.sec2_paragraph .right {
  width: 37.1875rem;
}

.sec2 a {
  font-family: roman;
  font-size: 24px;
}

/* 3rd screen | Works section */

.sec3 {
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: fit-content;
  position: relative;
  z-index: auto;
  margin: 0;
  pointer-events: none;
  gap: 25vh 15vw;
}

.sec3 .unit {
  height: fit-content;
  min-height: 30vh;
  position: relative;
  pointer-events: auto;
}

#frontal-section {
  margin-top: 0;
  z-index: 75;

  .unit:nth-child(1) {
    padding-right: 25vw;
  }
  .unit:nth-child(3) {
    min-height: 25rem;
    padding-right: 18vw;
  }
  .unit:nth-child(5) {
    padding-right: 22vw;
  }
  .unit:nth-child(6) {
    padding-left: 27vw;
  }
  .unit:nth-child(9) {
    padding-right: 28vw;
  }
  .unit:nth-child(11) {
    padding-right: 30vw;
  }
}

#back-section {
  .unit:nth-child(2) {
    padding-left: 30vw;
  }
  .unit:nth-child(4) {
    padding-left: 23vw;
  }
  .unit:nth-child(7) {
    padding-right: 35vw;
  }
  .unit:nth-child(8) {
    padding-left: 22vw;
  }
  .unit:nth-child(10) {
    padding-left: 27vw;
  }

  .unit:nth-child(12) {
    padding-left: 27vw;
  }
}

.sec3 .empty {
  pointer-events: none;
}

.work-image {
  max-width: 40vw;
  height: fit-content;
  object-fit: cover;
  transition: 0.65s ease-out;
  will-change: transform;

  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15), 0 10px 30px rgba(0, 0, 0, 0.01);
  border-radius: 0.2rem;

  filter: saturate(80%);
}

.work-image:hover {
  transform: scale(1.4);
  filter: saturate(100%);
}

.faded {
  opacity: 0.3;
}
.overlay-container {
  position: fixed;
  top: 0;
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: end;
  align-items: center;
  z-index: 100;
  pointer-events: none;
}

.project-overlay {
  background: black;
  color: white;
  padding: 1.5rem 2rem;
  font-family: sans-serif;
  font-size: 1.25rem;
  max-width: 100%;
  transition: 0.6s;
  margin-bottom: 5vh;
  opacity: 0;
}

.project-text {
  font-family: roman;
  display: inline;
  line-height: 1.4;
  text-transform: uppercase;
}

.project-text strong {
  font-family: bold;
  display: inline;
}

.project-text span {
  display: inline;
  white-space: normal;
}
.project-text span::before {
  content: "//";
  color: #666;
  margin: 0 0.5rem;
}

.hover-background {
  position: fixed;
  top: -5vh;
  left: -5vw;
  width: 110vw;
  height: 110vh;

  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;

  filter: blur(30px);
  opacity: 0;
  transition: opacity 0.75s cubic-bezier(0.25, 0.1, 0.25, 1);
  pointer-events: none;
}

/* 4th screen */

.sec4 {
  flex-direction: column;
  position: relative;
  height: auto;
  z-index: auto;
}

.sec4 .sec-title {
  position: relative;
  margin-bottom: 8.75rem;
}

.service_unit {
  position: relative;
  width: 100%;
}

.service_unit .top {
  position: absolute;
  display: flex;
  flex-direction: row;
  align-items: center;
  z-index: 100;

  width: 100vw;
  top: 0;
  left: 0;
}

.unit-counter {
  width: 5.3125rem;
  font-family: bold;
  font-size: 36px;
  align-items: center;
}

.unit-divider {
  position: relative;
  width: 100%;
  height: 0.3125rem;
  background-color: var(--text);
}

.service_unit .bottom {
  height: 26.625rem;
  display: flex;
  align-items: center;
  padding-left: 16.25rem;
}

.service_unit .bottom h1 {
  line-height: 100%;
}

/* Contacts Screen */

.sec5 {
  flex-direction: column;
  z-index: 100;
}

.sec5 .top {
  width: 83.5rem;
  display: flex;
  justify-content: space-between;
}

.sec5 .top h4 {
  font-family: medium;
  font-size: 22px;
}

.sec5 .contacts {
  height: 100%;
  display: flex;
  flex-direction: column;
  padding-left: 22.5rem;
  justify-content: center;
}

.sec5 h1 {
  width: 75rem;
  word-break: break-all;
  margin-bottom: 5.4375rem;
  text-decoration: underline;
}

.sec5 .social {
  display: flex;
  flex-direction: row;
  gap: 1.875rem;
}

.sec5 .social a,
.sec5 .social p {
  font-family: medium;
  font-size: 40px;
  margin: 0;
  text-transform: uppercase;
}

/* Дополнительное */

body {
  cursor: default;
}
.custom-cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: white;
  color: black;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 14px;
  pointer-events: none;
  transform: translate(-50%, -50%) scale(0.6);
  opacity: 0;
  transition: transform 0.2s ease-out, opacity 0.2s ease-out;
  z-index: 9999;
}
body.cursor-active {
  cursor: none;
}

body.cursor-active .custom-cursor {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}