/* GLOBAL */

:root {
  --bg-body: hsl(0, 0%, 8%);
  --bg-body2: hsl(0, 0%, 14%);
  --accent: hsl(153, 71%, 59%);
  --text1: hsl(0, 0%, 100%);
  --text2: hsl(0, 0%, 85%);
  --invalid: hsl(7, 100%, 68%);
  --color-star: hsl(38, 92%, 55%);
  --border-subtle: hsla(0, 0%, 85%, 0.15);
  --fs-18: 1.125rem;
  --fs-sm: 0.875rem;
  --fs-section-headline: clamp(1.75rem, 4vw, 2.5rem);
  --radius: 8px;
  --container: 69.375rem;
  --transition: 250ms ease-in-out;
}

[data-theme="light"] {
  --bg-body: hsl(0, 0%, 97%);
  --bg-body2: hsl(0, 0%, 91%);
  --accent: hsl(153, 65%, 28%);
  --text1: hsl(0, 0%, 8%);
  --text2: hsl(0, 0%, 30%);
  --border-subtle: hsla(0, 0%, 15%, 0.15);
}

[data-theme="dark"] .icon-moon,
[data-theme="light"] .icon-sun {
  display: none;
}

[data-theme="light"] .header__social > svg > path,
[data-theme="light"] footer .header__social > svg > path {
  fill: var(--text1);
}

[data-theme="light"] .hero__rings {
  filter: brightness(0);
  opacity: 0.5;
}

[data-theme="light"] .hero__circle {
  filter: brightness(0);
  opacity: 0.25;
}

.hero__image {
  background-color: var(--bg-body2);
}

html,
body {
  overflow-x: hidden;
}

html {
  box-sizing: border-box;
  font-size: 100%;
  scroll-behavior: smooth;
}

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

body,
input,
textarea,
button {
  font-family: "Space Grotesk", sans-serif;
}

body {
  margin: 0;
  background-color: var(--bg-body);
  color: var(--text1);
  font-size: var(--fs-18);
  line-height: 1.56;
}

.bg-less-dark {
  background-color: var(--bg-body2);
}

h1,
h2,
h3 {
  line-height: 1;
}

.header-xl {
  font-size: clamp(2.5rem, 6vw, 3.9rem);
  letter-spacing: -0.028em;
  line-height: 1.1;
}

p {
  font-size: clamp(1rem, 0.79rem + 0.89vw, 1.125rem);
  line-height: 1.5;
  color: var(--text2);
}

a {
  transition: color var(--transition);
}

a:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px dashed var(--accent);
  outline-offset: 2px;
}

input:invalid,
textarea:invalid {
  outline-color: var(--invalid);
}

a.underline,
button {
  display: inline-block;
  padding-bottom: 0.625rem;
  font-size: 1rem;
  line-height: 1.625;
  letter-spacing: 0.143em;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text1);
  text-decoration: none;
  background-image: linear-gradient(
    to right,
    var(--accent) 75%,
    var(--accent) 75%
  );
  background-position: 0 2.1em;
  background-repeat: repeat-x;
  background-size: 8px 2px;
}

a:hover {
  color: var(--accent);
}

img,
svg {
  display: block;
}

.visually-hidden {
  position: absolute;
  left: -10000px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.wrapper {
  width: calc(100% - 2rem);
  max-width: var(--container);
  margin-inline: auto;
}

/* 600px */
@media (min-width: 37.5em) {
  .wrapper {
    width: calc(100% - 3.75rem);
  }
}

/* UTILITY */

.bottom-border {
  border-bottom: 1px solid var(--text2);
}

.top-border {
  border-top: 1px solid var(--text2);
}

.section-padding {
  padding-block: 32px;
}

@media (min-width: 37.5em) {
  .section-padding {
    padding-block: 48px;
  }
}

@media (min-width: 62.5em) {
  .section-padding {
    padding-block: 64px;
  }
}

/* THEME TOGGLE */

.theme-toggle {
  all: unset;
  cursor: pointer;
  color: var(--text1);
  display: flex;
  align-items: center;
  transition: color var(--transition);
}

.theme-toggle:hover {
  color: var(--accent);
}

.theme-toggle svg {
  display: block;
}

/* HEADER */

.header {
  position: relative;
  z-index: 1;
  margin-block-start: 20px;
}

.header__nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  text-align: center;
  gap: 20px 25px;
}

.header__home {
  font-size: 1.5rem;
  font-size: clamp(1.5rem, 1.02rem + 2.04vw, 2rem);
  line-height: 1;
  color: var(--text1);
  text-decoration: none;
  flex: 1 0 100%;
}

.header__social > svg > path {
  transition: fill var(--transition);
}

.header__social:hover > svg > path {
  fill: var(--accent);
}

.lang-switch {
  color: var(--text1);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  transition: color var(--transition);
}

.lang-switch:hover {
  color: var(--accent);
}

@media (min-width: 37.5em) {
  .header {
    margin-block-start: 30px;
  }

  .header__nav {
    justify-content: flex-start;
    align-items: center;
    text-align: left;
    gap: 32px;
  }

  .header__home {
    flex: 0 1 auto;
    margin-inline-end: auto;
  }
}

@media (min-width: 62.5em) {
  .header {
    margin-block-start: 40px;
    margin-block-end: 127px;
  }

  .header__nav {
    padding-right: 30px;
  }
}

/*  HERO */

.hero__wrapper {
  padding-block: 56px 40px;
}

@media (min-width: 37.5em) {
  .hero__wrapper {
    padding-block: 0;
  }
}

.hero__content picture,
.hero__rings,
.hero__circle {
  display: none;
}

.hero__image {
  position: absolute;
  top: 0;
  left: 50%;
  translate: -50%;
  width: auto;
  height: 100vh;
}

.hero__rings {
  position: absolute;
  right: 50%;
  top: 130px;
  z-index: -1;
  height: auto;
}

.hero__circle {
  position: relative;
  top: 171px;
  margin-bottom: -129px;
  translate: calc(100vw - 64px - 16px);
}

.hero__text {
  position: relative;
  text-align: center;
  margin-block-start: 40px;
}

.hero__headline {
  margin-block-end: 24px;
}

.hero__headline > br {
  display: none;
}

h1 > span {
  color: var(--accent);
}

.hero__description {
  margin-block-end: 24px;
}

.hero__testimonials-bg {
  background-color: var(--bg-body2);
}

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

@media (min-width: 37.5em) {
  .hero__testimonials {
    grid-template-columns: 1fr 1fr;
  }
}

.hero__testimonial {
  display: flex;
  flex-direction: column;
  padding: 20px 24px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
}

.hero__stars {
  color: var(--color-star);
  font-size: 1.1rem;
  letter-spacing: 3px;
  margin-block-end: 10px;
}

.hero__quote {
  font-size: 0.9375rem;
  color: var(--text2);
  line-height: 1.6;
  margin: 0 0 10px;
}

.hero__testimonial-source {
  font-size: 0.8125rem;
  color: var(--accent);
  margin-top: auto;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

@media (min-width: 37.5em) {
  .hero {
    position: relative;
    margin-block-start: -62px;
  }

  .hero__content {
    display: flex;
    align-items: center;
  }

  .hero__content picture {
    display: block;
    order: 2;
  }

  .hero__rings,
  .hero__circle {
    display: block;
  }

  .hero__image {
    position: relative;
    width: 42vw;
    max-width: 445px;
    height: auto;
    left: auto;
    right: 0;
    translate: 0;
  }

  .hero__rings {
    top: 90px;
    right: auto;
    left: 0;
    translate: -50%;
  }

  .hero__circle {
    position: absolute;
    top: auto;
    right: 0;
    bottom: 190px;
    translate: 50%;
    z-index: 1;
  }

  .hero__text {
    margin-block-start: 90px;
    margin-right: -30px;
    flex: 1 0 58vw;
    text-align: left;
    z-index: 1;
  }

  .hero__headline {
    margin-block-end: 60px;
  }

  .hero__headline > br {
    display: inline-block;
  }

  .hero__description {
    margin-block-end: 34px;
  }
}

@media (min-width: 62.5em) {
  .hero {
    margin-block-start: 0;
  }

  .hero__wrapper {
    position: relative;
  }

  .hero__content {
    align-items: flex-start;
  }

  .hero__content picture {
    margin-left: -80px;
  }

  .hero__image {
    width: auto;
    height: 100vh;
    max-width: none;
    margin-block-start: -199px;
  }

  .hero__rings {
    top: 0;
    translate: -50% -50%;
  }

  .hero__circle {
    top: 322px;
    right: 445px;
  }

  .hero__text {
    margin-block-start: 0;
    margin-right: 0;
    flex: 1;
  }

  .hero__headline {
    margin-block-end: 43px;
  }

  .hero__description {
    width: 38ch;
    margin-block-end: 66px;
  }
}

/* ABOUT */


.about__content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 37.5em) {
  .about__content {
    gap: 32px;
  }
}

.about__image {
  width: 100%;
  max-width: 360px;
  height: auto;
  border-radius: var(--radius);
}

@media (min-width: 62.5em) {
  .about__image {
    height: 100%;
    object-fit: cover;
  }
}

.about__headline {
  font-size: var(--fs-section-headline);
  margin-block-end: 32px;
}

.about__text p {
  margin-block-end: 20px;
}

.about__text p:last-child {
  margin-block-end: 0;
}

.about__text strong {
  color: var(--text1);
}

@media (min-width: 62.5em) {
  .about__content {
    grid-template-columns: 2fr 3fr;
    gap: 60px;
    align-items: stretch;
  }

  .about__image {
    max-width: none;
    margin-inline: 0;
  }
}

/* TIMELINE */


.timeline__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 60px;
}

@media (min-width: 62.5em) {
  .timeline__inner {
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
  }
}

.timeline__headline {
  font-size: var(--fs-section-headline);
  margin-block-end: 32px;
  overflow-wrap: anywhere;
}

.tech-stack__label {
  grid-column: 1 / -1;
  font-size: var(--fs-sm);
  color: var(--text2);
  text-align: center;
}

.tech-stack__list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.tech-stack__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.tech-stack__item span {
  font-size: var(--fs-sm);
  color: var(--text2);
  text-align: center;
}

.timeline__list {
  list-style: none;
  padding: 0;
  border-left: 2px solid var(--accent);
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.timeline__item {
  padding-inline-start: 24px;
  position: relative;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--accent);
}

.timeline__date {
  font-size: var(--fs-sm);
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  display: block;
  margin-block-end: 6px;
}

.timeline__role {
  font-size: 1.25rem;
  font-weight: 700;
  margin-block-end: 4px;
}

.timeline__company {
  color: var(--text2);
  margin: 0;
}


/* PROJECTS */


.case-studies__headline {
  font-size: var(--fs-section-headline);
  margin-block-end: 32px;
}

.case-study__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.case-study__item + .case-study__item {
  margin-block-start: 64px;
}

@media (min-width: 62.5em) {
  .case-study__item + .case-study__item {
    margin-block-start: 80px;
  }
}

@media (min-width: 62.5em) {
  .case-study__item {
    grid-template-columns: 3fr 2fr;
    gap: 60px;
    align-items: center;
  }
}

.case-study__image {
  width: 100%;
  aspect-ratio: 1920 / 924;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--border-subtle);
}

.case-study__links {
  display: flex;
  gap: 32px;
}

.case-study__name {
  font-size: clamp(1.5rem, 3vw, 1.75rem);
  margin-block-end: 16px;
}

.case-study__description {
  margin-block-end: 24px;
}

.case-study__note {
  font-size: 0.875rem;
  color: var(--text2);
  margin-block-end: 24px;
}

/* footer */

footer {
  padding-block: 40px;
}

@media (min-width: 37.5em) {
  footer {
    padding-block: 48px;
  }
}

@media (min-width: 62.5em) {
  footer {
    padding-block: 64px;
  }
}