.tabs {
  --tabs-line-clr: var(--clr-primary);
  --tabs-line-thickness: 1px;
  --tabs-height: 30px;

  --tab-width: 100px;
   --tab-font-size: 1rem;
  --tab-clr: var(--clr-primary);
  --tab-clr-hover: var(--clr-secondary);
  
  --tab-indicator-height: 5px;
  --tab-indicator-clr: var(--clr-secondary);
  
  position: relative;
  width: min(calc(100% - 1rem), 600px);
  display: flex;
  flex-wrap: wrap;
  align-content: start;
  gap: 0rem;
}
@media (max-width: 600px){
  .tabs{
    --tab-width: 70px;
    --tab-font-size: .8rem;
  }
}
/* line under tabs */
.tabs::before {
  content: "";
  position: absolute;
  width: 100%;
  height: var(--tabs-line-thickness);
  top: var(--tabs-height);
  background-color: var(--tabs-line-clr);
}

/* current tab indicator */
.tabs::after {
  content: "";
  position: absolute;
  top: calc(var(--tabs-height) - var(--tab-indicator-height) / 2);
  left: 0;
  width: var(--tab-indicator-width,0px);
  height: var(--tab-indicator-height);
  border-radius: 99px;
  transition: translate 300ms ease-in-out, width 300ms ease-in-out,
    opacity 300ms ease-in-out;
  background-color: var(--tab-indicator-clr);
  translate: var(--tab-indicator-x);
  opacity: var(--tab-indicator-opacity, 1);
}

/* focus visible and open */
/* If we could use a counter within the calulations that way it would not be necesarry to define each one manually */
.tabs:has(details:nth-child(1) > summary:focus-visible),
.tabs:has(details[open]:nth-child(1)) {
  --tab-indicator-x: calc(var(--tab-width) * 0);
  --tab-indicator-width: var(--tab-width);
}
.tabs:has(details:nth-child(2) > summary:focus-visible),
.tabs:has(details[open]:nth-child(2)) {
  --tab-indicator-x: calc(var(--tab-width) * 1);
  --tab-indicator-width: var(--tab-width);
}
.tabs:has(details:nth-child(3) > summary:focus-visible),
.tabs:has(details[open]:nth-child(3)) {
  --tab-indicator-x: calc(var(--tab-width) * 2);
  --tab-indicator-width: var(--tab-width);
}
.tabs:has(details:nth-child(4) > summary:focus-visible),
.tabs:has(details[open]:nth-child(4)) {
  --tab-indicator-x: calc(var(--tab-width) * 3);
  --tab-indicator-width: var(--tab-width);
}

/* focus visible but NOT open (keyboard only) */
.tabs:has(details:not([open]):nth-child(1) > summary:focus-visible),
.tabs:has(details:not([open]):nth-child(2) > summary:focus-visible),
.tabs:has(details:not([open]):nth-child(3) > summary:focus-visible),
.tabs:has(details:not([open]):nth-child(4) > summary:focus-visible) {
  --tab-indicator-opacity: 0.5;
}
.tabs > details {
  display: contents; /* this is the key! */
}
.tabs > details[open] {
  --tab-contents-grid-rows: 1fr;
}
.tabs > details > summary {
  font-size: var(--tab-font-size);
  border: none;
  outline: none;
  cursor: pointer;
  display: block;
  order: 0;
  height: var(--tab-height);
  width: var(--tab-width);
  color: var(--tab-clr);
  display: grid;
  place-content: center;
  list-style: none;
  transition: color 300ms ease-in-out;
}
.tabs > details > summary::-webkit-details-marker {
  /* Hides marker on Safari */
  display: none;
}
.tabs > details > summary:focus-visible,
.tabs > details > summary:hover {
  color: var(--tab-clr-hover);
}
.tabs > details > .tab-contents-wrapper {
  order: 1;
  width: 100%;
  display: grid;
  grid-template-rows: var(--tab-contents-grid-rows, 0fr);
  margin-top: 1rem;
  transition: grid-template-rows 300ms ease-in-out;
}
.tabs > details .tab-contents {
  overflow: hidden; /* for grid-template-rows animation */
}

/* into animation when open */
.tabs > details[open] .tab-contents > * {
  animation: slide-up 1000ms;
}
@keyframes slide-up {
  from {
    opacity: 0;
    translate: 0 30px;
  }
  to {
    opacity: 1;
    translate: 0;
  }
}

/* JUST FOR THE DEMO CONTENT - NOT RELEVANT FOR THE TABS CODE */
.tab-contents{
  padding-top: 1rem;
  line-height: 1.5;
  color: rgb(229, 229, 229);
}
.tab-contents > h2 {
  font-size: 1.1rem;
  margin-block-end: 0.5rem;
}
.tab-contents li{
  margin-block: .5rem;
}
.tabs > details .tab-contents p + p {
  margin-top: 1rem;
}
.tabs > details .tab-contents > img {
  width: 60px;
  aspect-ratio: 1;
  float: left;
  margin-right: 0.5rem;
  border-radius: 10px;
}
.gallery {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 120px;
  grid-auto-rows: 120px;
  gap: 1rem;
  overflow-x: auto;
  overflow-y: hidden;
  padding-block-end: 1rem; /* for scroll bar */
}
.gallery > div {
  aspect-ratio: 1;
  overflow: hidden;
}
.gallery > div > img {
  width: 100%;
  height: 100%;
  max-width: 100%;

  object-fit: cover;
  transition: scale 1000ms ease-in-out, rotate 1000ms ease-in-out;
}
.gallery > div > img:hover {
  scale: 1.1;
  rotate: -5deg;
}
.contact-form label {
  display: block;
  margin-bottom: 5px;
  font-weight: 300;
  font-size: 0.8rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 10px;
  margin-bottom: 15px;
  border-radius: 5px;
  border: none;
  outline: none;
  background-color: rgba(255 255 255 / 0.4);
  transition: background-color 300ms ease-in-out;
}
.contact-form input:focus-visible,
.contact-form textarea:focus-visible {
  background-color: white;
}

.contact-form button {
  padding: 10px;
  background-color: var(--clr-secondary);
  border: none;
  outline: none;
  color: white;
  cursor: pointer;
  border-radius: 5px;
  transition: background-color 0.3s;
}

.contact-form button:focus-visible,
.contact-form button:hover {
  background-color: rgb(7 89 133);
}

/* general styling */
*,
::before,
::after {
  box-sizing: border-box;
}
:root {
  --clr-bg: #222;
  --clr-txt: #111;
  --clr-primary: rgb(248, 250, 252);
  --clr-secondary: rgb(56, 189, 248);
}
html {
  background-color: var(--clr-bg);
  font-family: 'Inter';
}

body {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  /*  justify-content: center;*/
  gap: 1.5rem;
  /*font-size: clamp(0.9rem, 2.5vw,1.4rem);*/
  color: var(--clr-primary);
  padding: 1rem;
}
h1 {
  font-size: clamp(1rem, 2.5vw + 0.25rem, 1.2rem);
  font-weight: 500;
  line-height: 1.6;
}
code,
pre {
  display: inline-block;
  color: #38bdf8;
  border: 1px solid hsl(from var(--clr-primary) h s 50% / 0.5);
  padding: 0.25rem 1rem;
  border-radius: 5px;
}
pre {
  white-space: pre-wrap;
}
em {
  font-size: 0.8rem;
}