/* ===========================
   CSS Variables
   =========================== */

:root {
  --color-bg: #FFFFFF;
  --color-text: #080808;
  --color-gray-800: #1C1C1C;
  --color-gray-500: #484848;
  --color-white: #FFFFFF;
  --color-border: #F5F5F5;
  --color-accent: #E93737;
  --color-navy: #171624;
  --color-navy-88: rgba(24, 23, 36, 0.88);

  --font-primary: 'Inter', sans-serif;
  --font-secondary: 'SF Pro Text', -apple-system, BlinkMacSystemFont, sans-serif;

  --transition-base: 0.3s ease;
}

/* ===========================
   Base / Reset
   =========================== */

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

html {
  font-size: 4.07vw;
  /* auto: меньше нагрузки при скролле, чем smooth на уровне документа */
  scroll-behavior: auto;
  overscroll-behavior-y: contain;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

@media (min-width: 769px) {
  html {
    font-size: 1.1111vw;
  }
}

body {
  font-family: var(--font-primary);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
  overflow-x: clip;
}

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

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

/* ===========================
   Reveal Animations
   =========================== */

.reveal {
  opacity: 0;
  transform: translate3d(0, 1rem, 0);
  transition: opacity 0.42s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.42s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal--visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ===========================
   Utility
   =========================== */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===========================
   Header
   =========================== */

main {
  position: relative;
}

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg);
}

.header__container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
}

@media (min-width: 769px) {
  .header__container {
    padding: 24px 80px;
  }
}

.header__logo {
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: 1.167rem;
  line-height: 1.5;
  color: var(--color-text);
  transition: opacity var(--transition-base);
}

@media (min-width: 769px) {
  .header__logo {
    font-size: 1.333rem;
  }
}

.header__logo:hover {
  opacity: 0.7;
}

.header__logo:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
  border-radius: 0.25rem;
}


.header__contact-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 0.625rem;
  padding: 0.875rem 1.25rem;
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: 0.875rem;
  line-height: 1.21;
  color: var(--color-white);
  background-color: var(--color-text);
  border: 1px solid var(--color-gray-800);
  border-radius: 0.75rem;
  cursor: pointer;
  transition: opacity var(--transition-base);
}

.header__contact-button svg {
  width: 1.125rem;
  height: 1.125rem;
  flex-shrink: 0;
}

@media (min-width: 769px) {
  .header__contact-button {
    display: inline-flex;
    padding: 0.933rem 1.333rem;
    font-size: 0.933rem;
    border-radius: 0.8rem;
    gap: 0.667rem;
  }

  .header__contact-button svg {
    width: 1.333rem;
    height: 1.333rem;
  }
}

.header__contact-button--hidden {
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.header__contact-button:hover {
  opacity: 0.8;
}

.header__contact-button:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
}

/* ===========================
   Hero
   =========================== */

.hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 3rem 1.5rem;
}

@media (min-width: 769px) {
  .hero {
    padding: 6.25rem 5rem;
    height: 50rem;
  }
}

.hero__container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2.5rem;
}

.hero__image {
  width: 4rem;
  height: 4rem;
  border-radius: 0.462rem;
  object-fit: cover;
}

@media (min-width: 769px) {
  .hero__image {
    width: 6.5rem;
    height: 6.5rem;
    border-radius: 0.75rem;
  }
}

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

@media (min-width: 769px) {
  .hero__content {
    padding-right: 8.75rem;
  }
}

.hero__description {
  font-family: var(--font-secondary);
  font-weight: 600;
  font-size: 1.5rem;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--color-gray-500);
}

@media (min-width: 769px) {
  .hero__description {
    font-size: 2.25rem;
  }
}

.hero__description strong {
  font-weight: inherit;
  color: var(--color-text);
}

/* ===========================
   Works
   =========================== */

.works {
  padding: 4.5rem 1.5rem;
}

@media (min-width: 769px) {
  .works {
    padding: 5rem;
  }
}

.works__header {
  margin-bottom: 2rem;
}

.works__title-block {
  display: flex;
  flex-direction: column;
}

.works__title-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.works__title {
  font-family: var(--font-secondary);
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--color-text);
}

@media (min-width: 769px) {
  .works__title {
    font-size: 3rem;
  }
}

.works__period {
  font-family: var(--font-primary);
  font-weight: 400;
  font-size: 1.125rem;
  line-height: 1.5;
  color: var(--color-gray-500);
}

.works__cards {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

@media (min-width: 769px) {
  .works__cards {
    display: flex;
    flex-wrap: wrap;
    flex-direction: row;
  }
}

.works__card {
  display: block;
  border-radius: 19.83px;
  overflow: hidden;
  transition: transform var(--transition-base);
}

.works__card picture {
  display: block;
  width: 100%;
  aspect-ratio: 345 / 325;
}

@media (min-width: 769px) {
  .works__card picture {
    aspect-ratio: 552 / 413;
  }
}

@media (min-width: 769px) {
  .works__card {
    flex: 1 1 calc(50% - 0.5rem);
    max-width: calc(50% - 0.5rem);
  }
}

@media (hover: hover) and (pointer: fine) {
  .works__card:hover {
    transform: translate3d(0, -0.25rem, 0);
    box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.08);
  }

  .works__card--nda:hover {
    transform: none;
    box-shadow: none;
  }
}

.works__card:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
}

.works__card--nda {
  cursor: default;
}

.works__card img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===========================
   Concepts (Мои концепты)
   =========================== */

.concepts {
  padding: 4.5rem 1.5rem;
}

@media (min-width: 769px) {
  .concepts {
    padding: 5rem;
  }
}

.concepts__inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.concepts__header {
  margin: 0;
}

.concepts__title {
  font-family: var(--font-secondary);
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--color-text);
  margin: 0;
}

@media (min-width: 769px) {
  .concepts__title {
    font-size: 3rem;
  }
}

.concepts__desktop {
  display: none;
}

.concepts__mobile {
  display: block;
}

@media (min-width: 769px) {
  .concepts__desktop {
    display: block;
  }

  .concepts__mobile {
    display: none;
  }
}

.concepts__stagger-desktop {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  width: 100%;
}

.concepts__figure {
  margin: 0;
  border-radius: 1.25rem;
  overflow: hidden;
}

.concepts__figure--half {
  min-width: 0;
  aspect-ratio: 552 / 413;
}

.concepts__figure--wide {
  grid-column: 1 / -1;
  width: 100%;
  aspect-ratio: 1120 / 413;
}

.concepts__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  cursor: zoom-in;
}

/* Lightbox (общий с кейсами — затемнение + увеличение по клику) */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(0, 0, 0, 0.85);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  padding: 1.5rem;
}

.lightbox--open {
  opacity: 1;
  visibility: visible;
}

.lightbox__img {
  max-width: 90vw;
  max-height: 90vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: 8px;
  transform: scale(0.92);
  transition: transform 0.3s ease;
}

.lightbox--open .lightbox__img {
  transform: scale(1);
}

.lightbox__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.15);
  border: none;
  border-radius: 50%;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  transition: background 0.2s ease;
  line-height: 1;
}

.lightbox__close:hover,
.lightbox__close:focus-visible {
  background: rgba(255, 255, 255, 0.3);
}

.lightbox__close:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .lightbox,
  .lightbox__img {
    transition: none;
  }
}

.concepts__stagger-mobile {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.concepts__mobile .concepts__figure {
  aspect-ratio: 345 / 258;
  width: 100%;
}

/* ===========================
   Timeline
   =========================== */

.timeline {
  padding: 4.5rem 1.5rem;
}

@media (min-width: 769px) {
  .timeline {
    padding: 5rem;
  }
}

.timeline__container {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

@media (min-width: 769px) {
  .timeline__container {
    flex-direction: row;
    gap: 2.5rem;
  }
}

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

@media (min-width: 769px) {
  .timeline__header {
    flex: 0 0 33.75rem;
  }
}

.timeline__title {
  font-family: var(--font-secondary);
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--color-text);
}

@media (min-width: 769px) {
  .timeline__title {
    font-size: 3rem;
    line-height: 1.3;
  }
}

.timeline__items {
  display: flex;
  flex-direction: column;
  gap: 4rem;
}

@media (min-width: 769px) {
  .timeline__items {
    flex: 1;
    gap: 4rem;
  }
}

.timeline__item {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

@media (min-width: 769px) {
  .timeline__item {
    gap: 1.125rem;
  }
}

.timeline__company {
  font-family: var(--font-secondary);
  font-weight: 600;
  font-size: 1.25rem;
  line-height: 1.3;
  letter-spacing: -0.012em;
  color: var(--color-navy);
  margin: 0;
}

@media (min-width: 769px) {
  .timeline__company {
    font-weight: 500;
    font-size: 2.25rem;
    letter-spacing: -0.007em;
  }
}

.timeline__details {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

@media (min-width: 769px) {
  .timeline__details {
    gap: 1.6875rem;
  }
}

.timeline__role-row {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
}

@media (min-width: 769px) {
  .timeline__role-row {
    flex-direction: row;
    align-items: center;
    gap: 0.75rem;
  }
}

.timeline__role {
  font-family: var(--font-secondary);
  font-weight: 500;
  font-size: 1rem;
  line-height: 1.35;
  letter-spacing: -0.011em;
  color: var(--color-navy);
}

@media (min-width: 769px) {
  .timeline__role {
    font-size: 1.5rem;
    line-height: 0.9;
    letter-spacing: -0.0075em;
  }
}

.timeline__date {
  font-family: var(--font-secondary);
  font-weight: 400;
  font-size: 0.875rem;
  line-height: 1.543;
  letter-spacing: -0.013em;
  color: #34333E;
}

@media (min-width: 769px) {
  .timeline__date {
    font-weight: 500;
    font-size: 1.125rem;
    line-height: 1.2;
    letter-spacing: -0.01em;
  }
}

.timeline__description {
  font-family: var(--font-secondary);
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.6;
  letter-spacing: 0.008em;
  color: var(--color-navy-88);
  padding: 0 0.125rem;
  margin: 0;
}

@media (min-width: 769px) {
  .timeline__description {
    font-size: 1.125rem;
  }
}

.timeline__achievements {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem;
  background-color: #F5F5F5;
  border-radius: 1rem;
}

.timeline__achievement {
  font-family: var(--font-primary);
  font-weight: 400;
  font-size: 0.875rem;
  line-height: 1.6;
  color: #000000;
  margin: 0;
}

@media (min-width: 769px) {
  .timeline__achievement {
    font-size: 0.984rem;
  }
}

.timeline__achievement strong {
  font-weight: 500;
}

/* ===========================
   Footer
   =========================== */

.footer {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  padding: 3rem 1.5rem 1rem;
}

@media (min-width: 769px) {
  .footer {
    padding: 5rem 5rem 1.5rem;
  }
}

.footer__content {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.footer__top {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

@media (min-width: 769px) {
  .footer__top {
    flex-direction: row;
    justify-content: space-between;
    gap: 3.125rem;
  }
}

.footer__title {
  font-family: var(--font-secondary);
  font-weight: 700;
  font-size: 1.75rem;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--color-text);
}

@media (min-width: 769px) {
  .footer__title {
    font-size: 3.5rem;
    line-height: 1.2;
  }
}

.footer__actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

@media (min-width: 769px) {
  .footer__actions {
    flex: 0 0 24.125rem;
    gap: 0.5rem;
  }
}

.footer__button-primary {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  background-color: var(--color-text);
  border: 1px solid var(--color-gray-800);
  border-radius: 1rem;
  color: var(--color-white);
  cursor: pointer;
  transition: opacity var(--transition-base);
}

@media (min-width: 769px) {
  .footer__button-primary {
    border-radius: 0.889rem;
    padding: 1.333rem;
  }
}

.footer__button-primary span {
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: 1.25rem;
  line-height: 1.21;
}

@media (min-width: 769px) {
  .footer__button-primary span {
    font-size: 1.111rem;
  }
}

.footer__button-primary svg {
  width: 1.5rem;
  height: 1.5rem;
  flex-shrink: 0;
}

@media (min-width: 769px) {
  .footer__button-primary svg {
    width: 1.333rem;
    height: 1.333rem;
  }
}

.footer__button-primary:hover {
  opacity: 0.8;
}

.footer__button-primary:focus-visible {
  outline: 2px solid var(--color-white);
  outline-offset: 2px;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer__link {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.25rem;
  padding: 1.5rem;
  background-color: #EDEDED;
  border-radius: 1rem;
  font-family: var(--font-secondary);
  font-weight: 500;
  font-size: 1.167rem;
  line-height: 1.19;
  color: var(--color-text);
  transition: opacity var(--transition-base);
}

@media (min-width: 769px) {
  .footer__link {
    padding: 1.371rem;
    border-radius: 0.914rem;
    font-size: 1.067rem;
  }
}

.footer__link svg {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

@media (min-width: 769px) {
  .footer__link svg {
    width: 1.143rem;
    height: 1.143rem;
  }
}

.footer__link:hover {
  opacity: 0.7;
}

.footer__link:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
  border-radius: 0.25rem;
}

.footer__separator {
  border: none;
  height: 1px;
  background-color: #F6F6F6;
}