/* styles.css */
:root {
  --primary-color: #2a1827;
  --secondary-color: #6c757d;
  --dark-color: #343a40;
  --light-color: #f4f4f4;
  --white: #fff;
  --danger-color: #dc3545;
  --covered: 50%;
  --link-color: #668be2;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  color: #333;
  overflow-x: hidden;
}

a {
  color: var(--link-color);
  text-decoration: none;
  text-shadow: 0 0;
}

main,
footer {
  a {

    transition: text-shadow 0.3s ease;
  }

  a:hover {
    /*glow effect */
    text-shadow: 0 0 5px var(--link-color), 0 0 10px var(--link-color), 0 0 20px var(--link-color);
  }
}


img {
  max-width: 100%;
}

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

.header {
  background: var(--dark-color);
  background-image: url(./bg-head.webp);
  background-size: cover;
  background-repeat: no-repeat;
  background-position: bottom;
  background-attachment: fixed;
  background-blend-mode: multiply;
  color: #fff;
  text-align: center;
  padding: 50px 20px;
}

.header .container {
  display: flex;
  flex-direction: column;
  justify-content: space-evenly;
  display: flex;
  height: 100%;
}

@media (min-width: 768px) {
  .header {
    display: flex;
    align-items: center;
    height: 100vh;
    padding: 0;
    padding-bottom: 115px;
  }

  main>section {
    flex: 1;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
  }
}

.header h1 {
  font-size: 3rem;
  margin: 0;
  background-image: url("https://github.com/Katenary/katenary/raw/refs/heads/develop/doc/docs/statics/logo-vertical.svg");
  color: transparent;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  height: 265px;
}

.header p {
  font-size: 1.2rem;
  margin: 20px 0;
}

.btn-primary {
  display: inline-block;
  background: #fff;
  color: var(--primary-color);
  padding: 10px 20px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  margin-top: 20px;
}

.btn-primary:hover {
  background: #0056b3;
  color: #fff;
}

.features {
  background: var(--light-color);
  padding: 50px 20px;
  text-align: center;
}

.features h2 {
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.feature-grid {
  /*
  display: grida;
  gap: 20px;
  margin-top: 20px;
  grid-auto-rows: 200px;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  */
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}

@keyframes slidingLeft {
  from {
    transform: translateX(-100vw);
    filter: opacity(0) blur(10px);
  }

  to {
    transform: translateX(0);
    filter: opacity(1) blur(0);
  }
}

@keyframes slidingRight {
  from {
    transform: translateX(100vw);
    filter: opacity(0) blur(10px);
  }

  to {
    transform: translateX(0);
    filter: opacity(1) blur(0);
  }
}

.feature-item {
  background: var(--white);
  border: 1px solid #ddd;
  flex: 1 1 200px;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

@media (min-width: 768px) {
  :root {
    --animation-slide: entry 0% contain 0%;
  }

  .from-left {
    view-timeline: --reveal-blockl;
    view-timeline-axis: block;
    animation: linear slidingLeft forwards;
    animation-range: var(--animation-slide);
    animation-timeline: --reveal-blockl;
  }

  .from-right {
    view-timeline: --reveal-blockr;
    view-timeline-axis: block;
    animation: linear slidingRight forwards;
    animation-range: var(--animation-slide);
    animation-timeline: --reveal-blockr;
  }
}

.how-it-works,
.how-to-use,
.tutorials {
  padding: 50px 20px;
  text-align: center;
}

h2 {
  font-size: 2.5rem;
  margin-bottom: 20px;
  text-align: center;
}

.how-it-works ol {
  list-style: decimal inside;
  text-align: left;
  max-width: 800px;
  margin: 0 auto;
  padding: 0;
}

.image-placeholder {
  margin: 30px auto;
  height: 275px;
  width: 100%;
  max-width: 1280px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.2rem;
  border-radius: 8px;
  padding: 2em 0;

  img {
    margin: 10px;
    width: 100%;
    height: 100%;
    object-fit: fill;
    border-radius: 8px;
  }

}

.get-started {
  background: var(--primary-color);
  color: var(--white);
  padding: 50px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;

  pre {
    background: var(--white);
    color: #333;
    padding: 10px;
    margin: 20px 0;
    border-radius: 5px;
  }

  >.container {
    display: flex;
    flex-direction: row;
  }
}


div.video {
  padding-top: 25px;
}

pre {
  text-align: left;
}

@media (min-width: 768px) {
  .example {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
  }

  iframe {
    width: 100%;
    height: 500px;
  }
}

iframe {
  max-width: 100%;
}

section {
  width: 100%;

  &:nth-child(even) .example {
    text-align: right;
    flex-direction: row-reverse !important;
  }

  &:nth-child(odd) .example {
    text-align: left;
    flex-direction: row;
  }

  &:nth-child(even) .example h3 {
    text-align: right;
  }

  &.alternate:nth-child(odd) {
    background: var(--light-color);
    color: var(--dark-color);
  }

  &.alternate:nth-child(even) {
    background: var(--dark-color);
    color: var(--light-color);
  }

}


.example>div {
  flex: 1 1 200px;
  align-content: center;
}

code.hljs {
  border-radius: 5px;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.5);
}

p code {
  background: var(--dark-color);
  color: var(--light-color);
  padding: 1px 5px;
  border-radius: 5px;
  display: inline-block;
}

#menu-toggle {
  position: fixed;
  z-index: 11;
  margin: 0;
}

@media (min-width: 768px) {
  #menu-toggle {
    display: none;
  }

  .navbar {
    background: var(--white);
    color: var(--dark-color);
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    position: fixed;
    top: 0px;
    z-index: 10;
    width: 100%;

    .container {
      padding: 0;
    }

    li {
      &.external {
        border-left: 1px solid var(--secondary-color);
      }
    }
  }


  nav ul {
    display: flex;
    flex-wrap: wrap;
    list-style: none;
  }

  nav ul li {
    margin: 0 10px;
  }

  nav ul li a {
    color: var(--dark-color);
    text-decoration: none;
    display: block;
    padding: 10px;
  }

  nav ul li a:hover {
    color: var(--light-color);
    background: var(--dark-color);
  }

  nav ul li a.active {
    color: var(--light-color) !important;
    background: var(--dark-color) !important;
  }
}

@media (max-width: 768px) {
  .navbar {
    display: none !important;
  }

  .navbar:hover,
  #menu-toggle:focus~.navbar {
    display: block !important;
  }

  .navbar {
    opacity: 0.8;
    position: fixed;
    top: 10px;
    left: 0px;
    color: var(--white);
    font-size: 1rem;
    cursor: pointer;
    background: var(--dark-color);
    color: var(--white);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    border: 1px solid var(--dark-color);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    border-radius: 5px;

    &:has(a:active) {
      display: none;
    }

  }

  nav ul {
    display: block;
    list-style: none;
    padding: 0;
    margin: 0;

    li {
      margin: 0;

      a {
        color: var(--white);
        text-decoration: none;
        display: block;
        padding: 10px;
      }
    }
  }


  a {
    color: var(--white);
    text-decoration: none;
    display: block;
    padding: 10px;
  }
}

footer {
  display: flex;
  flex-wrap: wrap;
  background: #333;
  color: #fff;
  text-align: center;
  padding: 20px 0;
  font-size: 0.9rem;

  section {
    padding: 20px;
    text-align: center;
    flex: 1 1 250px !important;

    p {
      font-weight: bold;
    }
  }

  ul {
    list-style: none;
    padding: 0;

    li {
      margin: 5px 0;
    }
  }


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

  .container {
    display: flex;
    flex: 1 1 auto;
    justify-content: space-between;
    align-items: start;
    width: 100%;
    flex-wrap: wrap;

    >p {
      flex: 1 1 auto;
      text-align: center;
    }
  }


  section {
    flex: 1 1 auto;
    align-self: normal;
    position: relative;
  }
}


@media (min-width: 768px) {
  footer section:after {
    content: " ";
    display: block;
    background: #fff;
    position: absolute;
    right: 0;
    top: 5%;
    height: 90%;
    width: 1px;
    filter: opacity(0.5) blur(1px);
  }

  footer section:last-child:after {
    display: none;
  }
}

.large-icon {
  font-size: 3rem;
}

@keyframes bouncing {
  0% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-20px);
  }

  100% {
    transform: translateY(0);
  }
}

.down {
  position: relative;
  bottom: 0;
}

a.down {
  background: var(--white);
  color: var(--dark-color);
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  align-self: center;
  animation: bouncing 2s infinite;
}