:root {
  --primary: light-dark(#333, #eee);
  --secondary: light-dark(#eee, #333);
  --accent: #67e;
  --accent-dark: #23a;
  --accent-light: #abe;
  --accent-text: #fff;
  --card: light-dark(#fff, #222);
  --card-text: light-dark(#666, #aaa);
  --shadow: #0001;
  --shadow-dark: #0002;
  --shadow-ldm: light-dark(#0002, #fff1);
  color-scheme: light dark;
}

a, a:link, a:visited {
  color: light-dark(var(--accent-dark), var(--accent-light));
}

a:hover {
  text-decoration: none;
}

body {
  background: var(--secondary);
  color: var(--primary);
  font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  margin: 0;
}

/* Header */
header {
  background:
    linear-gradient(
      90deg,
      var(--accent) 3rem,
      var(--accent-dark) 0,
      var(--accent-light) calc(100% - 3rem),
      var(--accent) 0
    );
  box-shadow: 0 0.25rem 0.75rem var(--shadow-dark);
  color: var(--accent-text);
  padding: 3rem 4rem;
  text-align: center;
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  text-shadow: 0 1px 2px var(--accent-dark);
}

header p {
  font-size: 1.1rem;
  opacity: 0.9;
  text-shadow: 0 1px 2px var(--accent-dark);
  text-wrap: balance;
}

/* Gallery */
.gallery {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}

.container {
  margin: 3rem auto;
  max-width: 1200px;
  padding: 0 1rem;
}

.gallery li {
  background: var(--card);
  border-radius: 0.75rem;
  box-shadow: 0 0.25rem 0.5rem var(--shadow);
  list-style: "";
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}

.gallery li:hover {
  box-shadow: 0 0.5rem 0.85rem var(--shadow-ldm);
}

.gallery a {
  color: inherit;
  display: block;
  text-decoration: none;
}

.gallery img {
  display: block;
  height: 15rem;
  object-fit: cover;
  width: 100%;
}

.gallery h2 {
  color: var(--accent);
  font-size: 1.35rem;
  margin: 0;
  padding: 1rem 1rem 0rem;
}

.gallery p {
  color: var(--card-text);
  padding: 0 1rem 1.5rem;
  margin-block: 0.5rem;
}

/* Footer */
footer {
  color: var(--card-text);
  margin-top: 3rem;
  padding: 2rem;
  text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
  header h1 {
    font-size: 2rem;
  }
  
  .gallery {
    gap: 1.5rem;
    grid-template-columns: 1fr;
  }
}

/* Illusion page*/
nav {
    padding: 1rem 2rem;
    background: var(--secondary);
    box-shadow: 0 0.25rem 0.75rem var(--shadow-dark);
}

.code {
  background: #111;
  border-radius: 0.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(50%, 1fr));
  grid-template-rows: auto 1fr;
  max-height: 50rem;
  min-height: 30rem;
  overflow: hidden;
  position: relative;
}

.code::before {
  color: #fff8;
  content: "Demo created by Alvaro Montoro";
  display: grid;
  font-size: 0.8em;
  grid-column: 1 / span 2;
  grid-row: 2;
  inset: 0;
  place-items: center;
  position: absolute;
}

.code [role="tablist"] {
  display: flex;
  grid-column: 1 / span 2;
  grid-row: 1;
}

.code [role="tablist"]:first-child {
  border-top-left-radius: 0.5rem;
}

.code label {
  align-items: center;
  background: #fff1;
  border: 0;
  color: #fff;
  cursor: pointer;
  display: flex;
  font-size: 1rem;
  margin: 0.25em;
  margin-inline-end: 0;
  padding: 1rem 2rem;
}

.code code {
  background: #222;
  box-sizing: content-box;
  color: #eee;
  grid-row: 2;
  padding: 1rem;
  position: relative;
  white-space: pre-wrap;
  overflow-y: auto;
}

.code input {
  appearance: none;
  width: 1em;
  height: 1em;
  border: 1px solid #fffb;
  margin-inline-start: 1em;
  position: relative;
}

.code a {
  position: absolute;
  top: 1.5rem;
  right: 1rem;
  width: 1rem;
  height: 1rem;
  overflow: clip;
  text-indent: 5em;
}

.code a::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  translate: -50% -50%;
  width: 0.8rem;
  height: 0.8rem;
  border: 2px solid #fff;
  box-shadow: 0 0 0 0.2rem #111;
}


.code a::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 0.4rem;
  height: 0.4rem;
  border-top: 1px solid #fff;
  border-right: 1px solid #fff;
  background: 
    linear-gradient(to bottom right, #0000 calc(50% - 1px), #fff 0 calc(50% + 1px), #0000 0),
    #111;
  box-shadow: 0 0 0 0.2rem #111;
}

.code input:checked::after {
  content: "";
  position: absolute;
  top: 30%;
  left: 50%;
  translate: -50% -50%;
  rotate: -45deg;
  width: 1em;
  height: 0.4em;
  border: 0.25em solid #fff0;
  border-bottom-color: lawngreen;
  border-left-color: lawngreen;
  scale: 0.6;
}

code .s { color: #d7ba7d; } /* rule selector */
code .v { color: #acf; } /* variables */
code .f { color: #dcdcaa; } /* functions */
code .k { color: #ce9178; } /* keywords */
code .n { color: #b2cba6; } /* numbers */
code .p { color: #9cdcff; } /* property */
code .c { color: #666; font-style: italic; } /* comments */
code .l { color: #74bb4f; } /* strings */

.code iframe {
  border: 0;
  grid-row: 2;
  grid-column: 2;
  height: 100%;
  object-fit: cover;
  position: relative;
  width: 100%;
}

.code:has(#result-tab:not(:checked)) #result-panel,
.code:has(#code-tab:not(:checked)) #code-panel {
  display: none;
}

.code:has(#code-tab:not(:checked)) #result-panel,
.code:has(#result-tab:not(:checked)) #code-panel {
  grid-column: 1 / span 2;
}

.description {
  margin: 3rem auto;
  max-width: 80ch;
}

.description p,
.description ul {
  font-size: 1.1rem;
  line-height: 1.5;
}

.description h2,
.description h3 {
  color: var(--accent);
  margin-block-start: 4rem;
}

.warning {
  color: #822;
  background: #ffcccc;
  border-left: 0.5rem solid #822;
  padding: 1rem 1.5rem;
  margin: 2rem 0;
}