/*===============  global styles===============*/
* {
  padding: 0;
  margin: 0;
  border: 0;
  outline: 0;
  background-color: inherit;
  color: inherit;
  font-family: inherit;
  font-size: inherit;
  box-shadow: none;
  box-sizing: border-box;
}
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background-color: var(--clr-bg);
}
::-webkit-scrollbar-thumb {
  background-color: var(--clr-primary);
  border: 1px solid var(--clr-bg);
  border-radius: 0.5em;
}
::-webkit-scrollbar-thumb:hover {
  background-color: var(--clr-fg-alt);
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "Poppins", sans-serif;
  line-height: 1.5;
  color: var(--clr-fg);
  background-color: var(--clr-bg);
}
.light {
  --clr-bg: #fff;
  --clr-bg-alt: #fff;
  --clr-fg: #555;
  --clr-fg-alt: #444;
  --clr-primary: #2978b5;
  --clr-scroll: #f2f2f2;
  --shadow: rgba(100, 100, 111, 0.2) 0px 7px 29px 0px;
}
.dark {
  --clr-bg: #23283e;
  --clr-bg-alt: #2a2f4c;
  --clr-fg: #bdbddd;
  --clr-fg-alt: #cdcdff;
  --clr-primary: #90a0d9;
  --clr-scroll: #2a2f4c;
  --shadow:
    rgba(0, 0, 0, 0.16) 0px 10px 36px 0px, rgba(0, 0, 0, 0.06) 0px 0px 0px 1px;
}
::-moz-selection {
  background: var(--clr-primary);
  color: var(--clr-bg);
}
::-webkit-selection,
::selection {
  background: var(--clr-primary);
  color: var(--clr-bg);
}
h1,
h2,
h3,
h4 {
  line-height: 1.2;
  color: var(--clr-fg-alt);
}
h1 {
  font-size: 4rem;
}
h2 {
  font-size: 2rem;
}
h3 {
  font-size: 1.5rem;
}
h4 {
  font-size: 1.3rem;
}
ul {
  list-style-type: none;
}
a {
  text-decoration: none;
}
button {
  cursor: pointer;
}
@media (max-width: 900px) {
  h1 {
    font-size: 2.6rem;
  }
} /*===================  buttons and links===================*/
.link {
  color: var(--clr-primary);
  padding: 0 0 0.3em 0;
  position: relative;
}
.link:hover {
  color: var(--clr-primary);
}
.link::before {
  content: "";
  display: inline;
  width: 0%;
  height: 0.2em;
  position: absolute;
  bottom: 0;
  background-color: var(--clr-primary);
  transition: width 0.2s ease-in;
}
.link:hover::before,
.link:focus::before {
  width: 100%;
}
.link--nav {
  color: var(--clr-fg);
  font-weight: 500;
}
.link--icon {
  color: var(--clr-fg);
  font-size: 1.5rem;
  display: inline-block;
}
.btn {
  background-color: var(--primary);
  border-radius: 2em;
  color: var(--bg);
  display: block;
  padding: 0.8em 1.4em;
  font-weight: 500;
  font-size: 0.9rem;
  transition: transform 0.2s ease-in-out;
}
.btn--outline {
  color: var(--clr-primary);
  border: 2px solid var(--clr-primary);
  position: relative;
  overflow: hidden;
  z-index: 1;
}
.btn--outline:focus,
.btn--outline:hover {
  color: var(--clr-bg);
}
.btn--outline:before {
  content: "";
  position: absolute;
  background-color: var(--clr-primary);
  right: 100%;
  bottom: 0;
  left: 0;
  top: 0;
  z-index: -1;
  transition: right 0.2s ease-in-out;
}
.btn--outline:hover::before,
.btn--outline:focus::before {
  right: 0;
}
.btn--plain {
  text-transform: initial;
  background-color: var(--clr-bg-alt);
  box-shadow: rgba(0, 0, 0, 0.15) 0px 3px 3px 0px;
  border: 0;
}
.btn--plain:hover {
  transform: translateY(-4px);
}
.btn--icon {
  padding: 0;
  font-size: 1.2rem;
}
.btn--icon:hover,
.btn--icon:focus {
  color: var(--clr-primary);
}
.btn--icon:active {
  transform: translateY(-5px);
} /*========  layout========*/
.center {
  display: flex;
  align-items: center;
  text-align: center;
}
.about_icon_center {
  width: 100%;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
}
.header {
  height: 8em;
  max-width: 1100px;
  width: 95%;
  margin: 0 auto;
  justify-content: space-between;
}
main {
  max-width: 1100px;
  width: 95%;
  margin: 0 auto;
}
.section {
  margin-top: 5em;
}
.section__title {
  text-align: center;
  margin-bottom: 1em;
  text-transform: uppercase;
}
.nav__list {
  margin-right: 1.5em;
  display: flex;
}
.nav__list-item {
  margin-left: 1.5em;
}
.nav__hamburger {
  display: none;
  width: 1em;
}
.about {
  flex-direction: column;
  margin-top: 3em;
}
.about__name {
  color: var(--clr-primary);
}
.about__role {
  margin-top: 1.2em;
}
.about__desc {
  font-size: 1rem;
}
.about__desc,
.about__contact {
  margin-top: 2.4em;
}
.about .link--icon {
  margin: 0em 0.8em;
  padding-bottom: 0em;
}
.projects__grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, minmax(18em, 1fr));
  gap: 2.5em;
  margin-bottom: 2.5em;
  justify-items: center;
}
.project {
  padding: 2em 2em 1.2em 2em;
  margin: 0 auto;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform 0.2s linear;
}
.project:hover {
  transform: translateY(-7px);
}
.project__description {
  margin-top: 1em;
}
.project__stack {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  margin: 1.2em 0;
}
.project__stack-item {
  margin: 0.5em;
  font-weight: 500;
  font-size: 0.8rem;
  color: var(--clr-fg-alt);
}
.contact {
  flex-direction: column;
}
.footer {
  padding: 3em 0;
  margin-top: 4em;
  text-align: center;
}
.footer__link {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--clr-fg);
}
.scroll-top {
  display: none;
  position: fixed;
  bottom: 1em;
  right: 2em;
  font-size: 1.5rem;
  transition: transform 0.2s ease-in-out;
}
.scroll-top .scroll-top-btn {
  background-color: var(--clr-scroll);
  border-radius: 50%;
  padding: 0.5em 0.8em;
} /*======  blog======*/
.blog__list {
  list-style-position: outside;
  margin: 2rem auto;
  max-width: 700px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.blog__list-item .link--nav {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--clr-fg);
  text-decoration: none;
  transition: color 0.2s ease;
  display: flex;
  align-items: center;
  position: relative;
}
.blog__list-item .link-text {
  position: relative;
  display: inline-block;
}
.blog__list-item .link-text::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.2em;
  height: 0.2em;
  width: 0;
  background-color: var(--clr-primary);
  transition: width 0.2s ease-in;
}
.blog__list-item .link--nav:hover .link-text::before,
.blog__list-item .link--nav:focus .link-text::before {
  width: 100%;
}
.blog__list-item .dotted-line {
  flex: 1;
  border-bottom: 1px dashed var(--clr-fg-alt);
  margin: 0 0.5rem;
}
.blog__list-item .blog-date {
  font-size: 0.9em;
  color: var(--clr-fg-alt);
  white-space: nowrap;
}
.blog-paragraph {
  margin-bottom: 1em;
}
.blog-table {
  margin: 1.5em auto;
  border-collapse: collapse;
}
.blog-table-cell {
  border: 1px solid #000;
  padding: 8px;
}
.blog-math {
  text-align: center;
  margin: 1em 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  max-width: 100%;
}
.case-list {
  margin: 1.5em 0;
  padding-left: 1.5em;
}
.case-list li {
  margin-bottom: 1.5em;
  padding-left: 0.5em;
}
.case-list li:last-child {
  margin-bottom: 0;
}
.quote-indent {
  border-left: 4px solid var(--clr-primary);
  padding-left: 1em;
  margin: 1em 0;
  background-color: var(--clr-bg);
}
.title {
  font-size: 2.5em;
  margin-bottom: 0.5em;
  color: var(--clr-fg);
}
.date {
  font-size: 1.2em;
  margin-bottom: 2em;
  color: var(--clr-fg);
}
@media (max-width: 600px) {
  .header {
    height: 4.5em;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--clr-bg);
    z-index: 100;
    width: 100%;
    max-width: 100%;
    padding-left: 2.5%;
    padding-right: 2.5%;
    padding-top: 1em;
    margin: 0;
  }
  .section {
    margin-top: 4em;
  }
  body {
    padding-top: 4.5em;
    transition: padding-top 0.3s ease-in-out 0.1s;
  }
  body.menu-open {
    padding-top: 16em;
    transition: padding-top 0.3s ease-in-out;
  }
  .nav__list {
    flex-direction: column;
    width: 100%;
    position: fixed;
    left: 0;
    top: 4.5em;
    background-color: var(--clr-bg);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-in-out;
    padding: 0;
    align-items: center;
    text-align: center;
    z-index: 50;
  }
  .nav__list::after {
    content: "";
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--clr-fg-alt);
    margin-top: 1em;
  }
  .display-nav-list {
    max-height: 500px;
    padding: 0;
    transition: max-height 0.3s ease-in-out 0.1s;
  }
  .nav__list-item {
    margin: 0.5em 0;
    width: 100%;
    text-align: center;
  }
  .nav__hamburger {
    display: flex;
    margin-left: 0.8em;
  }
  .about {
    align-items: center;
    margin-top: 2em;
  }
  .footer {
    padding: 2em;
    margin-top: 3em;
  }
  .scroll-container {
    display: flex;
    justify-content: flex-end;
  } /* Responsive tables and math */
  table {
    font-size: 0.8em;
    overflow-x: auto;
    display: block;
    width: 100%;
    max-width: 100%;
  }
  .MathJax {
    font-size: 80% !important;
  }
  .MathJax_Display {
    overflow-x: auto;
    padding: 0.5em;
    max-width: 100%;
  }
  .post-content p {
    overflow-x: auto;
  }
  .post-content div[style*="text-align: center"] {
    overflow-x: auto;
    padding: 0.5em;
  }
  .post-content img {
    width: 100% !important;
    height: auto !important;
  }
  .projects__grid {
    display: flex;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: 1.5em;
    padding: 0 1em;
    padding-left: max(1em, calc(50vw - 9em));
    padding-right: max(1em, calc(50vw - 9em));
    max-width: none;
    margin: 0 0 2.5em 0;
    justify-content: flex-start;
    scroll-snap-type: x mandatory;
    overscroll-behavior-x: contain;
  }
  .project {
    flex: 0 0 18em;
    min-width: 18em;
    scroll-snap-align: center;
    scroll-snap-stop: always;
    padding: 1.5em;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    margin: 1em 0;
  }
  .scroll-top {
    right: 1em;
    bottom: 1em;
  }
}