:root {
  --bg-color-dark: #0c314d;
  --bg-color-light: #e6f0ff;
  --bg-footer-color: #0c314d;
  --color-blue: #2b6ba8;
  --color-white: #ffffff;
  --bg-color-light-button: var(--color-white);

  --container-width: 1100px;
  --container-padding-x: 15px;
  --container-padding-y: 50px;

  --font-family: "SpaceGrotesk", sans-serif;

  --font-size-big: 50px;
  --font-size-medium: 40px;
  --font-size-small: 18px;

  --transition-duration: 0.4s;
}

.dark-theme {
  --bg-color-light: #0c314d;
  --bg-color-dark: #f5f5f5;
  --color-blue: #2b6ba9;
  --color-white: #f5f5f5;
  --bg-color-light-button: #2b6ba8;
  --bg-footer-color: #0c314d;
}

@font-face {
  font-family: "Space Grotesk";
  src: url("../fonts/SpaceGrotesk-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Space Grotesk";
  src: url("../fonts/SpaceGrotesk-Bold.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Space Grotesk";
  src: url("../fonts/SpaceGrotesk-SemiBold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

body {
  background: var(--bg-color-dark);
  color: var(--bg-color-light);
  font-family: "Space Grotesk", sans-serif;
}

@keyframes scrolling-header {
  to {
    height: 90px;
    box-shadow: 0 2px 2px rgb(0 0 0 / 0.5);
  }
}

.header {
  background-color: var(--bg-color-dark);
  position: sticky;
  left: 0;
  top: 0;
  padding-bottom: 15px;
  padding-top: 15px;
  width: 100%;
  height: 120px;
  animation-name: scrolling-header;
  animation-fill-mode: both;
  animation-timeline: scroll();
  animation-range: 50px 150px;
  z-index: 1000;
  margin-bottom: 90px;
}

.container {
  margin-left: auto;
  margin-right: auto;
  max-width: calc(var(--container-width) + var(--container-padding-x) * 2);
  padding-left: var(--container-padding-x);
  padding-right: var(--container-padding-x);
  width: 100%;
}

.header__inner {
  display: flex;
  gap: 30px;
  justify-content: space-between;
  align-items: center;
}

.logo {
  width: 70px;
  height: 70px;
}

.header__menu-list {
  display: flex;
  font-size: 20px;
}

.header__menu-item:not(:last-child) {
  margin-right: 40px;
}

.header__menu-link {
  padding-bottom: 15px;
  padding-top: 15px;
  color: var(--bg-color-light);
  position: relative;
  cursor: pointer;
  text-decoration: none;
}

.header__menu-link:after {
  content: "";
  display: block;
  position: absolute;
  right: 0;
  bottom: 12px;
  width: 0;
  height: 2px;
  background-color: var(--color-blue);
  transition: var(--transition-duration);
}

.header__menu-link:hover:after {
  content: "";
  width: 100%;
  display: block;
  position: absolute;
  left: 0;
  bottom: 12px;
  height: 2px;
  background-color: var(--color-blue);
  transition: var(--transition-duration);
}

.header__menu-link:hover {
  color: var(--color-blue);
}

.theme-button {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  border: 2px solid var(--color-blue);
  width: 80px;
  height: 41px;
  border-radius: 30px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

#theme-toggle {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 32px;
  height: 32px;
  background: var(--bg-color-light-button);
  border-radius: 50%;
  color: var(--bg-color-dark);
  box-shadow: 0 0 19px var(--bg-color-dark);
  border: none;
  position: absolute;
  left: 5px;
  transition: transform 500ms, left 500ms;
}

.dark-theme .theme-button #theme-toggle {
  transform: rotate(360deg);
  left: calc(100% - 37px);
}


.hero__inner {
  margin-bottom: var(--container-padding-y);
  display: flex;
  justify-content: space-between;
  gap: 30px;
  
}
.hero__inner img {
  opacity: 0.9;
  box-shadow: 3px 3px 10px rgba(0 ,0 , 0, 0.7);
  border-radius: 10px;
}

.hero__title {
  font-size: var(--font-size-big);
}

.hero__body {
  max-width: 50%;
  width: 500px;
}

.button {
  margin-top: 120px;
  width: 270px;
  height: 60px;
  border: none;
  outline: none;
  color: var(--color-white);
  background: var(--color-blue);
  cursor: pointer;
  position: relative;
  z-index: 0;
  border-radius: 10px;
  box-shadow: 3px 3px 12px #010101;
}

.button:before {
  content: "";
  background: linear-gradient(
    45deg,
    #1b0451,
    #471781,
    #219dc0,
    #282ea4,
    #1a7d84,
    #142c85,
    #13a0a0,
    #811a77,
    #352558
  );
  position: absolute;
  top: -2px;
  left: -2px;
  background-size: 400%;
  z-index: -1;
  filter: blur(5px);
  width: calc(100% + 4px);
  height: calc(100% + 4px);
  animation: glowing 20s linear infinite;
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
  border-radius: 10px;
}

.button:hover:before {
  opacity: 1;
}

.button:after {
  z-index: -1;
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  background: var(--color-blue);
  left: 0;
  top: 0;
  border-radius: 10px;
}

@keyframes glowing {
  0% {
    background-position: 0 0;
  }
  50% {
    background-position: 400% 0;
  }
  100% {
    background-position: 0 0;
  }
}

.section__hero {
  margin-bottom: var(--container-padding-y);
}

.section__about {
  padding-block: var(--container-padding-x);
  margin-bottom: var(--container-padding-y);
}

.title {
  text-align: center;
  font-size: var(--font-size-medium);
  font-family: var(--font-family);
  padding-block: 10px 40px;
  color: var(--color-blue);
}

.section__description {
  font-size: 20px;
}

.skill__list {
  display: flex;
  flex-direction: column;
  gap: 40px;
  max-width: 900px;
  margin: 0 auto;
}

.skill__item {
  opacity: 0;
  transform: translateX(100px);
  transition: all 0.8s ease-out, background-color 0.3s ease, border-color 0.3s ease;
  background: var(--color-blue);
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.7);
  cursor: pointer;
}

.skill__item:nth-child(even) {
  transform: translateX(-100px);
}

.skill__item.show {
  opacity: 1;
  transform: translateX(0);
}

.skill__item:hover {
  background: var(--bg-color-light);
  border-color: rgba(0, 100, 255, 0.5);
  color: var(--bg-color-dark);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.skill__item p {
  margin: 0;
  font-size: 18px;
}

.section__experience {
  padding: var(--container-padding-y);
}

.portfolio {
  display: flex;
  flex-direction: column;
  gap: 15px;
  max-width: 900px;
  margin: 0 auto;
  padding: var(--container-padding-x);
}

.card {
  display: flex;
  flex-direction: row;
  align-items: center;
  background: var(--color-blue);
  border-radius: 8px;
  overflow: hidden;
  height: 200px;
  cursor: pointer;
  margin-bottom: 25px;
  transition: box-shadow 0.3s ease;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.7);
  transition: all 0.8s ease-out, background-color 0.3s ease,
    border-color 0.3s ease;
}

.card:hover {
  background: var(--bg-color-light);
  border-color: rgba(0, 100, 255, 0.5);
  color: var(--bg-color-dark);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.card img {
  height: 100%;
  width: auto;
  transition: transform 0.3s ease;
}

.card img:hover {
  transform: scale(1.1);
}

.card-content {
  flex: 1;
  padding: 10px 15px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  margin-left: 40px;
}

.card-content h3 {
  margin: 0;
  font-size: 18px;
}

.icons {
  margin-top: 5px;
  display: flex;
  gap: 8px;
}

.icons span {
  font-size: 20px;
  cursor: pointer;
}

.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  justify-content: center;
  align-items: center;
  z-index: 990;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.modal.show {
  display: flex;
  opacity: 1;
}

.modal img {
  margin-top: 90px;
  max-height: 82vh;
  max-width: auto;
  border-radius: 2px;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.modal img:hover {
  transform: scale(1.05);
}

footer {
  margin-top: auto;
  background: var(--bg-footer-color);
  box-shadow: 0 -4px 8px rgba(0, 0, 0, 0.4);
  color: #fff;
  padding: var(--container-padding-x);
}

.footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

footer .footer-left {
  font-size: var(--font-size-small);
  font-weight: 500;
}

footer .footer-right {
  display: flex;
  gap: 18px;
  margin-top: 10px;
}

footer .footer-right a {
  color: #fff;
  font-size: 28px;
  transition: transform 0.3s ease, color 0.3s ease;
}

footer .footer-right a:hover {
  color: var(--color-blue);
  transform: scale(1.3);
}
.copyright {
  margin-top: 30px;
  color: var(--color-blue);
}

@media (max-width: 836px) {
  @keyframes scrolling-header {
    to {
      height: 170px;
      box-shadow: 0 2px 2px rgb(0 0 0 / 0.5);
    }
  }

  .header {
    height: 230px;
  }

  .header__inner {
    flex-wrap: wrap;
  }

  .header__menu {
    order: 1;
  }

  .button {
    margin-top: 80px;
  }

  .card {
    flex-direction: column;
    height: auto;
  }
}

@media (max-width: 635px) {
  @keyframes scrolling-header {
    to {
      height: 210px;
      box-shadow: 0 2px 2px rgb(0 0 0 / 0.9);
    }
  }

  .header {
    height: 250px;
  }

  .header__menu-list {
    font-size: 18px;
    flex-wrap: wrap;
  }

  .hero__inner {
    flex-direction: column;
    align-items: center;
    margin-block: 20px;
  }

  .hero__title {
    flex-wrap: wrap;
  }

  .hero__body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
  }

  footer {
    flex-direction: column;
    text-align: center;
    gap: 15px;
  }
}