@import url("https://fonts.googleapis.com/css2?family=Source+Sans+Pro:ital,wght@0,400;0,600;0,700;1,300&display=swap");

html {
  --font-size-name: 36px;
  --font-size-prof: 32px;
  --font-size-title: 28px;
  --font-size-link: 24px;
  --font-size-subtitle: 24px;
  --font-size-text: 20px;
  --font-size-little: 18px;
  --color-main: rgb(2, 120, 151);
  --color-link-hover: #d49817;
  /* --color-link-hover: rgb(1, 101, 126); */
  --color-white: #ebebeb;
  --color-dark: #121212;
  --color-text-light: #acb8c1;
  --color-text-dark: #121212;

  --margin-section: 50px;

  scroll-behavior: smooth;
}

html.dark {
  --color-main: rgb(4, 71, 89);
  --color-link-hover: #bc7319;
}

html.dark img {
  filter: brightness(75%);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  list-style: none;
  text-decoration: none;
}

body {
  font-family: "Source Sans Pro", sans-serif;
  color: var(--color-text-dark);
}

body.dark {
  color: var(--color-text-light);
  background-color: var(--color-dark);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* header */

header {
  background-color: var(--color-main);
  height: 200px;
}

.header-container {
  position: relative;
  display: flex;
  justify-content: space-around;
  align-items: center;
  max-width: 1440px;
  height: 100%;
}

figure {
  position: absolute;
  top: 50px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  width: 300px;
  height: 300px;
  border: 25px solid var(--color-main);
  border-radius: 50%;
  background-color: var(--color-main);
}

figure img {
  position: relative;
  top: 0px;
  width: 100%;
  height: 100%;
  border-radius: 50%;
}

html.dark img {
  border-color: var(--color-link-hover);
}

.nav {
  display: flex;
  width: 87%;
  user-select: none;
}

.nav ul:first-child {
  width: 43%;
}

.nav ul:last-child {
  margin-left: 230px;
  width: 30%;
}

.nav-links {
  display: flex;
  justify-content: space-evenly;
  width: 100%;
}

.nav-link {
  padding: 5px 25px;
  color: #fff;
  font-size: var(--font-size-link);
  border-radius: 50px;
  transition: hover 0.2s;
}

html.dark .nav-link,
html.dark .switch-info {
  color: var(--color-white);
}

.nav-link:hover {
  background-color: var(--color-link-hover);
}

/* Switch */

.switch-wrapper {
  position: relative;
  left: -50px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  margin-top: 18px;
}

.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
  align-self: center;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  -webkit-transition: 0.4s;
  transition: 0.4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: var(--color-link-hover);
  -webkit-transition: 0.4s;
  transition: 0.4s;
}

.slider.noTransition {
  -webkit-transition: none;
  transition: none;
}

.slider.noTransition::before {
  -webkit-transition: none;
  transition: none;
}

input:checked + .slider {
  background-color: #258fc16b;
}

input:checked + .slider:before {
  -webkit-transform: translateX(26px);
  -ms-transform: translateX(26px);
  transform: translateX(26px);
}

.slider {
  border-radius: 30px;
}

.slider:before {
  border-radius: 50%;
}

.switch-info {
  align-self: center;
  font-size: var(--font-size-little);
  font-style: italic;
  font-weight: 300;
  color: #fff;
  transition: color 0.3s ease;
}

/* name section */

.container-name {
  text-align: center;
  margin-top: 170px;
}

.name {
  font-size: var(--font-size-name);
  margin: 10px 0;
}

.prof {
  font-size: var(--font-size-text);
  font-style: italic;
}

/* contacts section */

.container-contacts {
  position: relative;
  left: 14px;
  display: flex;
  justify-content: center;
  margin-top: 10px;
}

.hidden {
  opacity: 0;
  visibility: hidden;
  display: none;
}

.container-contacts ul {
  display: flex;
}

.container-contacts li:last-child {
  margin-left: 40px;
}

.contact-info {
  position: relative;
  color: inherit;
  font-size: var(--font-size-text);
}

.contact-picture {
  position: absolute;
  top: 0;
  left: -30px;
  height: 25px;
  width: 25px;
  background-size: initial;
  background-repeat: no-repeat;
  filter: invert(0%) sepia(9%) saturate(2447%) hue-rotate(336deg)
    brightness(90%) contrast(86%);
}

html.dark .contact-picture {
  filter: invert(76%) sepia(13%) saturate(224%) hue-rotate(163deg)
    brightness(95%) contrast(87%);
}

.cellphone {
  background-image: url(assets/cellphone.svg);
}

.email {
  background-image: url(assets/email.svg);
}

/* about me section */

.container-about-me {
  text-align: center;
  max-width: 940px;
  margin: var(--margin-section) auto;
}

.title {
  display: inline-block;
  font-size: var(--font-size-title);
  margin-bottom: 30px;
  border-bottom: 2px solid orange;
}

html.dark .title {
  border-color: var(--color-link-hover);
}

.text {
  font-size: var(--font-size-text);
}

/* Projects */

.container-projects {
  text-align: center;
  margin: var(--margin-section) auto;
}

.projects {
  display: flex;
  justify-content: space-between;
  width: 100%;
  margin-top: 40px;
}

.projects > li {
  position: relative;
  width: 22%;
  height: 150px;
}

html.light .project-link:hover {
  transform: scale(1.1);
}

html.dark .project-link:hover {
  filter: brightness(90%);
}

.project-link {
  position: absolute;
  top: 0;
  left: 0;
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  width: 100%;
  height: 100%;
  border-radius: 25px;
  transition: filter 0.2s, transform 0.5s;
}

html.dark .project-link {
  filter: brightness(75%);
}

.project-link.museum {
  background-image: url(assets/museum.png);
}

.project-link.alarm-clock {
  background-image: url(assets/alarm-clock.png);
}

.project-link.vertical-slider {
  background-image: url(assets/vertical-slider.png);
}

.project-link.video-player {
  background-image: url(assets/video-player.png);
}

.project-name,
.project-info,
.project-tools {
  position: absolute;
  bottom: -40px;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  text-align: center;
  color: var(--color-text-dark);
  font-size: var(--font-size-subtitle);
}

.project-info {
  font-style: italic;
  bottom: -60px;
  font-size: var(--font-size-little);
  opacity: 1;
}

.project-tools {
  bottom: -80px;
  font-size: var(--font-size-little);
  opacity: 0.5;
}

html.dark .project-name,
html.dark .project-info,
html.dark .project-tools {
  color: var(--color-text-light);
}

/* code example section */

.container-code-example {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: calc(var(--margin-section) + 40px) auto var(--margin-section) auto;
}

.code-example {
  width: 50%;
}

code.hljs {
  font-size: var(--font-size-little);
}

/* education section */

.container-education {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.education-list > li {
  display: flex;
  font-size: var(--font-size-text);
  margin-bottom: 25px;
}

.education-time {
  font-weight: 600;
  width: 50%;
  margin-left: 40px;
}

.education-info.BNTU {
  margin-left: 55px;
}

.education-title {
  font-weight: 600;
  font-size: var(--font-size-text);
  margin-bottom: 10px;
}

/* skills section */

.container-skills {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 50px;
  margin-bottom: 50px;
}

.skills-list {
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  height: 130px;
  width: 50%;
  margin-left: 15%;
  font-size: var(--font-size-text);
}

.skills-list > li {
  list-style: circle;
  margin-bottom: 5px;
}

/* video */

.container-video {
  display: flex;
  justify-content: center;
}

.video {
  border-radius: 10px;
  width: 720px;
  height: 405px;
  margin-bottom: 50px;
  border: 0;
}

html.dark .video {
  filter: brightness(75%);
}
/* footer */

footer {
  background-color: var(--color-main);
  padding: 25px 0;
}

.footer-links {
  display: flex;
  justify-content: space-evenly;
  margin-right: 200px;
}

.footer-links > li {
  position: relative;
  width: 60px;
  height: 60px;
  margin-left: 50px;
  transition: transform 0.2s;
}

.footer-link {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  width: 100%;
  height: 100%;
}

.footer-links > li:hover {
  transform: scale(0.9);
}

.footer-links span {
  position: absolute;
  left: 160px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 40px;
  font-weight: 700;
  color: #000;
}

.github {
  background-image: url(assets/GitHub-Mark-64px.png);
}

.rs-school {
  width: 160px;
  background-image: url(assets/rs_school_js.svg);
}

@media (max-width: 1300px) {
  html {
    --font-size-link: 20px;
    --font-size-subtitle: 20px;
    --font-size-little: 16px;
  }

  .container {
    max-width: 990px;
  }

  .header-container {
    max-width: 1200px;
  }

  .nav-link {
    padding: 5px 15px;
  }

  .projects {
    flex-wrap: wrap;
    justify-content: space-evenly;
    margin: 40px auto;
    max-width: 768px;
  }

  .projects > li {
    width: 40%;
    margin-bottom: 100px;
  }

  .skills-list {
    width: 60%;
  }
}

@media (max-width: 1199px) {
  .container {
    max-width: 950px;
  }

  .header-container {
    max-width: 950px;
    justify-content: center;
  }

  .nav ul:last-child {
    margin-left: 180px;
  }

  .nav-links {
    flex-direction: column;
    align-items: center;
    width: 100%;
  }

  .nav-links li {
    margin: 10px;
  }

  .nav-link {
    padding: 5px 10px;
  }

  figure {
    width: 250px;
    height: 250px;
    border: 20px solid var(--color-main);
  }

  .switch-wrapper {
    left: 0;
  }

  .video {
    width: 640px;
    height: 360px;
  }
}

@media (max-width: 991px) {
  html {
    --font-size-link: 28px;
    --margin-section: 40px;
  }

  .container {
    max-width: 720px;
    padding: 0px;
  }

  .menu-icon {
    position: absolute;
    right: 8%;
    z-index: 3;
    width: 36px;
    height: 22px;
    cursor: pointer;
  }

  .menu-icon span,
  .menu-icon::before,
  .menu-icon::after {
    position: absolute;
    left: 0;
    height: 13%;
    width: 100%;
    transition: transform 0.2s;
    background-color: #fff;
  }

  .menu-icon::before,
  .menu-icon::after {
    content: "";
  }

  .menu-icon::before {
    top: 0;
  }

  .menu-icon::after {
    bottom: 0;
  }

  .menu-icon span {
    top: 50%;
    transition: none;
    transform: translateY(-50%);
  }

  .menu-icon.active span {
    transform: scale(0) translateY(-50%);
  }

  .menu-icon.active::before {
    top: 50%;
    transform: rotate(-45deg) translateY(-50%);
  }

  .menu-icon.active::after {
    bottom: 50%;
    transform: rotate(45deg) translateY(50%);
  }

  .nav {
    position: fixed;
    top: -370px;
    height: 370px;
    z-index: 1;
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    background-color: var(--color-main);
    transition: top 0.5s;
  }

  .nav ul:first-child {
    align-items: flex-start;
    margin-top: 20px;
    margin-left: 7%;
  }

  .nav ul:last-child {
    align-items: flex-start;
    margin-left: 7%;
  }

  .nav-links {
    display: flex;
    justify-content: space-evenly;
    margin-left: 5%;
  }

  .nav-link {
    padding: 5px 25px;
    color: #fff;
    font-size: var(--font-size-link);
  }

  .switch-wrapper {
    position: fixed;
    top: -70px;
    left: 10%;
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    margin-top: 18px;
    transition: top 0.5s;
  }

  .container-name {
    margin-top: 140px;
  }

  .container-code-example {
    margin: var(--margin-section) auto;
  }
}

@media (max-width: 767px) {
  html {
    --font-size-name: 30px;
    --font-size-title: 24px;
    --font-size-subtitle: 18px;
    --font-size-text: 18px;
    --font-size-little: 14px;
  }

  .container {
    max-width: 525px;
  }

  header {
    height: 100px;
  }

  figure {
    top: 25%;
    left: 50%;
    transform: translateX(-50%);
    width: 150px;
    height: 150px;
    border: 10px solid var(--color-main);
  }

  .container-name {
    margin-top: 100px;
  }

  .code-example {
    width: 70%;
  }

  .education-info.BNTU {
    margin-left: 50px;
  }

  .video {
    width: 520px;
    height: 295px;
    margin-bottom: 30px;
  }

  footer {
    padding: 15px 0;
  }

  .footer-links {
    margin-right: 110px;
  }

  .footer-links > li {
    width: 40px;
    height: 40px;
    margin-left: 40px;
  }

  .footer-links span {
    left: 108px;
    font-size: 30px;
  }

  .rs-school {
    width: 108px;
  }
}

@media (max-width: 575px) {
  html {
    --font-size-name: 26px;
    --font-size-title: 22px;
    --font-size-subtitle: 16px;
    --font-size-text: 16px;
    --font-size-little: 13px;
    --margin-section: 30px;
  }

  .container {
    max-width: 420px;
  }

  .nav ul:first-child {
    width: 100%;
  }

  .container-contacts > ul {
    flex-direction: column;
    align-items: center;
  }

  .container-contacts li:first-child {
    margin-top: 15px;
  }

  .container-contacts li:last-child {
    margin-top: 15px;
    margin-left: 0;
  }

  .projects > li {
    width: 80%;
    margin-bottom: 100px;
  }

  .code-example {
    width: 100%;
    margin-left: -40px;
  }

  pre code.hljs {
    overflow-x: visible !important;
    margin-left: -20px !important;
  }

  .education-info.BNTU {
    margin-left: 45px;
  }

  .video {
    width: 400px;
    height: 225px;
  }

  footer {
    padding: 15px 0;
  }

  .footer-links {
    margin-right: 55px;
  }

  .footer-links > li {
    width: 25px;
    height: 25px;
    margin-left: 25px;
  }

  .footer-links span {
    left: 67px;
    font-size: 20px;
  }

  .rs-school {
    width: 67px;
  }
}

@media (max-width: 450px) {
  .container {
    max-width: 290px;
  }

  .switch-wrapper {
    left: 13%;
  }

  .code-example {
    width: 80%;
    margin-left: 0;
  }

  pre code.hljs {
    margin-left: -15px !important;
    padding: 0 !important;
    font-size: 8px;
  }

  .education-info.BNTU {
    margin-left: 20px;
  }

  .video {
    width: 300px;
    height: 170px;
  }
}