:root {
    --foreground-default: #212224;
    --foreground-alt: #36404D;
    --foreground-onbrand: #FFFFFF;
    --foreground-ondark: #FFFFFF;
    --foreground-onwhite: #212224;
    --foreground-ondark-dynamic: #FFFFFF;
    --background-base: #FFFFFF;
    --background-elevation-one: #FFFFFF;
    --background-elevation-two: #FFFFFF;
    --background-alt: #F9FAFB;
    --background-alt-two: #F2F2F2;
    --background-dark: #212224;
    --background-dark-dynamic: #212224;
    --background-darker: #141416;
    --background-white: #FFFFFF;
    --border-default: #E3E5EA;
    --border-alt: #C6CBD1;
  }

  [data-theme="dark"] {
    --foreground-default: #FFFFFF;
    --foreground-alt: #CFD2D7;
    --foreground-onbrand: #FFFFFF;
    --foreground-ondark: #FFFFFF;
    --foreground-onwhite: #212224;
    --foreground-ondark-dynamic: #212224;
    --background-base: #000000;
    --background-elevation-one: #121416;
    --background-elevation-two: #1C1E1F;
    --background-alt: #151515;
    --background-alt-two: #252629;
    --background-dark: #212224;
    --background-dark-dynamic: #FFFFFF;
    --background-darker: #141416;
    --background-white: #FFFFFF;
    --border-default: #33383F;
    --border-alt: #494F58;
  }

  h1, h2, h3, h4, h5 {
    line-height: 1.4;
    color: var(--foreground-default);
    transition: 0.3s;
  }

 h1 {
    letter-spacing: 0.1rem;
    font-size: calc(1.6rem + 2vw);
 }

 h2 {
    font-size: calc(1.6rem + .9vw);
    letter-spacing: 0.06rem;
 }

  p {
    color: var(--foreground-alt);
    font-family: "Inter", sans-serif;
    font-optical-sizing: auto;
    font-weight: 300;
    font-style: normal;
    font-variation-settings:
    "slnt" 0;
    font-size: 1.2rem;
    line-height: 1.6;
  }

  .row {
        --bs-gutter-x: 0;
  }
  
.btn-primary,
.btn-inverted,
.btn-outline {
    background-color: var(--background-dark-dynamic);
    color: var(--foreground-ondark-dynamic);
    padding: 16px 24px;
    border-radius: 50px; 
    text-decoration: none;
    font-family: "Inter", sans-serif;
    font-weight: 600;
    white-space: nowrap;
    display: inline-block;
    cursor: pointer;
    transition: 0.3s;
}

.btn-inverted {
    background-color: var(--background-white);
    color: var(--foreground-onwhite);
    border: 1px solid #000;
}

.btn-inverted:hover {
    border: 1px solid var(--border-alt);
    box-shadow: 0 0 8px 4px #FFFFFF30;
}

.btn-outline {
    background-color: var(--background-darker);
    color: var(--foreground-ondark);
    border: 2px solid var(--background-white);
}

.btn-outline:hover {
    box-shadow: 0 0 8px 4px #FFFFFF30;
}

.btn-primary:hover {
    opacity: 0.9;
}

body {
    font-family: "DM Sans", sans-serif;
    font-optical-sizing: auto;
    font-weight: 500;
    font-style: normal;
    background-color: var(--background-base);
    transition: 0.3s;
  }

  .theme-switch-wrapper {
    display: flex;
    align-items: center;
  }

  .theme-switch-text {
    margin-left: 10px;
    font-size: 0.8rem;
    color: var(--foreground-default);
    text-transform: uppercase;
  }

  /* .theme-light > svg {
    color: var(--foreground-default);
    margin-right: 4px;
  } */

  .theme-dark {
    display: flex;
  }

  .theme-dark > svg {
    color: var(--foreground-alt);
    margin-left: 6px;
  }

  .theme-switch {
    display: inline-block;
    height: 22px;
    position: relative;
    width: 34px;
  }
  
  .theme-switch input {
    opacity: 0;
  }
  
  .slider {
    background-color: #ccc;
    bottom: 0;
    cursor: pointer;
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
    transition: .4s;
  }
  
  .slider:before {
    background-color: #fff;
    bottom: 4px;
    content: "";
    height: 14px;
    left: 4px;
    position: absolute;
    transition: .4s;
    width: 14px;
  }
  
  input:checked + .slider {
    background-color: #FFF;
  }

  /* input:checked ~ .theme-switch-text {
    color: red !important;
  } */

  input:checked + .slider:before {
    background-color: #000;
  }

  input:checked + .slider:before {
    transform: translateX(12px);
  }
  
  .slider.round {
    border-radius: 34px;
  }
  
  .slider.round:before {
    border-radius: 50%; 
  }
  
.header-wrapper {
    background-color: var(--background-alt);
    border-bottom: 1px solid var(--background-alt-two);
    position: fixed;
    padding: 20px 34px;
    width: 100%;
    z-index: 10;
    transition: 0.3s;
}

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

.header .logo {
    display: flex;
    align-items: center;
}

.header .logo img {
    padding-right: 10px;
}

.logo-text {
    color: var(--foreground-default);
}

.hero {
    letter-spacing: 1.5;
    text-align: center;
    padding-top: 300px;
    padding-bottom: 260px;
}

.gallery { 
    padding-left: 16px;
    padding-right: 16px;
}

.gallery .row {
    display: flex;
    flex-wrap: wrap;
    padding: 0 4px;
}

.gallery .column {
    flex: 25%;
    max-width: 25%;
    padding: 0 8px;
}

.gallery img, .gallery video {
    margin-top: 16px;
    vertical-align: middle;
    width: 100%;
    border-radius: 20px;
}

.gallery .column.first {
    margin-top: 100px;
}

.gallery .column.third {
    margin-top: 100px;
}

@media screen and (max-width: 800px) {
    .gallery .column {
      flex: 50%;
      max-width: 50%;
    }
    .gallery .column.first {
        margin-top: 0;
    }
    
    .gallery .column.third {
        margin-top: 0;
    }
  }
  
@media screen and (max-width: 600px) {
    .gallery .column {
      flex: 100%;
      max-width: 100%;
    }
  }

.hero2 {
    text-align: center;
    margin-top: 200px;
    margin-bottom: 200px;
}

.work-title {
    margin-right: 48px;
    margin-top: 16px;
    margin-bottom: 48px;
    position: sticky;
    top: 40%;
}

.work-title p {
    margin-top: 16px;
    margin-bottom: 48px;
}

.project-card {
    padding: 32px;
    border: 1px solid var(--border-default);
    border-radius: 20px;
    display: block;
    text-decoration: none;
    transition: 0.3s;
    margin-bottom: 48px;
    background-color: var(--background-elevation-one);
}

.project-card:hover {
    box-shadow: 0px 0px 12px var(--border-default);
    border: 1px solid var(--border-alt);
}

.project-title {
    margin-bottom: 24px;
}

.project-title h3 {
    color: var(--foreground-default);
}

.project-card img {
    margin-top: 16px;
    width: 100%;
    border-radius: 20px;
}

.project-tags {
    margin-top: 24px;
}

.project-tags span {
    border: 1px solid var(--border-alt);
    border-radius: 20px;
    padding: 6px 12px;
    margin-right: 4px;
}

.talks {
    margin-top: 160px;
    position: relative;
}

.talks-video {
    z-index: -100;
    width: 100%;
    height: 800px;
    object-fit: cover;
    object-position: center center;
    margin-bottom: -6px;
}

.talks-content {
    position: absolute;
    top: 0; left: 0;
    text-align: center;
    padding: 0 28%;
    z-index: 2;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    height: 100%;
}

.talks-content-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.talks-overlay {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    z-index: 2;
    background: linear-gradient(0deg, rgba(0,0,0,1) 0%, rgba(255,255,255,0) 70%);
}

.talks-title {
    max-width: 500px;
}

.talks-title, .talks-subtitle, .talks-description {
    color: var(--foreground-ondark);
}

.talks-subtitle {
    opacity: 70%;
    margin-bottom: 24px;
}

.talks-button {
    margin-top: 32px;
}

.talks-icon {
    width: 80px;
    height: 80px;
    opacity: 0.7;
    margin-bottom: 32px;
    transition: 0.3s;
}

.talks-icon:hover {
    opacity: 1;
}

.talks-other {
    background-color: #000;
    color: var(--foreground-ondark);
    padding-top: 100px;
    padding-bottom: 100px;
}

.talks-other-cards {
    --bs-gutter-x: 2.4rem;
}

.talks-other h4 {
    color: var(--foreground-ondark);
    margin-bottom: 32px;
}

.talks-other h5 {
    color: var(--foreground-ondark);
}

.talks-other-card {
    min-height: 246px;
    background-size: cover;
    text-decoration: none;
    padding: 16px 32px;
    display: flex;
    align-items: flex-end;
    border-radius: 20px;
    outline: 1px solid #e3e5ea40;
    transition: 0.3s;
}

.talks-other-card:hover {
    outline: 1px solid #e3e5ea80;
}

.talks-other-description {
    color: var(--foreground-ondark);
}

.talks-other-description p {
    color: var(--foreground-ondark);
    font-size: 1rem;
    opacity: 0.7;
}

.talks-other-icon {
    width: 32px;
    height: 32px;
    margin-bottom: 16px;
}

.blog {
    margin-top: 200px;
    margin-bottom: 200px;
}

.blog-title {
    margin-bottom: 64px;
}

.blog-card {
    padding: 40px;
    border-radius: 20px;
    border: 1px solid var(--border-default);
    display: inline-block;
    text-decoration: none;
    transition: 0.3s;
    margin-bottom: 48px;
    background-color: var(--background-elevation-one);
}

.blog-card:hover {
    box-shadow: 0px 0px 12px var(--border-default);
    border: 1px solid var(--border-alt);
}

.blog-card-content {
    margin-right: 48px;
}

.blog-card-date {
    font-size: 1rem;
    color: var(--foreground-alt);
    font-weight: 300;
    margin-bottom: 16px;
}

.blog-card-title {
    margin-bottom: 32px;
    color: var(--foreground-default);
}

.blog-card-img {
    border-radius: 20px;
    width: 100%;
    height: 100%;
    max-width: 450px;
    object-fit: cover;
    object-position: left;
}

.blog-button {
    margin-top: 16px;
}

.courses {
    position: relative;
}

.courses-video {
    z-index: -100;
    width: 100%;
    height: 750px;
    object-fit: cover;
    object-position: bottom;
    margin-bottom: -6px;
}

.courses-content {
    position: absolute;
    top: 0; left: 0;
    text-align: center;
    padding: 0 25%;
    z-index: 2;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    height: 100%;
}

.courses-overlay {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    z-index: 2;
    background: linear-gradient(0deg, rgba(0,0,0,1) 10%, rgba(255,255,255,0) 100%);
}

.courses-title, .courses-subtitle, .courses-description {
    color: var(--foreground-ondark);
}

.courses-subtitle {
    opacity: 70%;
    margin-bottom: 24px;
}

.courses-button {
    margin-top: 32px;
}

.courses-other {
    background-color: #000;
    color: var(--foreground-ondark);
    padding-top: 100px;
    padding-bottom: 100px;
}

.courses-other h4 {
    color: var(--foreground-ondark);
}

.courses-other-card {
    background-image: url("images/courses-other.png");
    min-height: 276px;
    background-size: cover;
    text-decoration: none;
    padding: 16px 32px;
    display: flex;
    align-items: flex-end;
    border-radius: 20px;
    margin-top: 32px;
    outline: 1px solid #e3e5ea40;
    transition: 0.3s;
}

.courses-other-card:hover {
    outline: 1px solid #e3e5ea80;
}

.courses-other-content {
    max-width: 400px;
}

.courses-other-content h5, .courses-other-content p {
    color: var(--foreground-ondark);
} 

.courses-other-content p {
    opacity: 0.7;
    font-size: 1rem;
}

.recommendations {
    margin-top: 200px;
    margin-bottom: 200px;
}

.recommendations-title {
    margin-bottom: 64px;
}

.recommendations-card-wrapper {
    --bs-gutter-x: 1.5rem;
}

.recommendations-card {
    border-radius: 20px;
    padding: 32px;
    background-color: var(--background-elevation-one);
    border: 1px solid var(--border-default);
}

.recommendations-quote {
    color: var(--foreground-default);
    font-size: 1.1rem;
}

.recommendations-author {
    display: flex;
    margin-top: 24px;
}

.recommendations-author img {
    max-width: 50px;
    max-height: 50px;
}

.recommendations-author-info {
    margin-left: 16px;
}

.recommendations-author-info p {
    font-size: 0.8rem;
    color: var(--foreground-alt);
    margin: 0;
}

.recommendations-author-name {
    font-weight: 600;
    margin-bottom: 0;
}

.footer {
    background-color: var(--background-darker);
    height: 100vh;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    align-content: center;
    transition: 0.3s;
}

.footer-wrapper {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.footer-content {
    text-align: center;
    display: flex;
    flex-grow: 1;
    flex-direction: column;
    justify-content: center;
}

.footer-content h2, .footer-content p {
    color: var(--foreground-ondark);
}

.footer-content h2 {
    margin-bottom: 24px;
}

.footer-content p {
    margin-bottom: 48px;
    opacity: 0.8;
}

.footer-content .btn-inverted {
    margin-right: 16px;
}

.footer-icons {
    display: flex;
    justify-content: center;
    margin-bottom: 64px;
}

.footer-icons a {
    opacity: 0.7;
    transition: 0.3s;
}

.footer-icons a:hover {
    opacity: 1;
}

.footer-icon {
    max-width: 24px;
    max-height: 24px;
    margin-right: 54px;
}

.footer-buttons > .btn-inverted {
    margin-bottom: 24px;
}