@layer base, components, utilities;

@layer base {
  :root {
    --white: 100% 0 0;
    --light: 98% 0.02 85;
    --dark: 40% 0.02 18;
    --magenta: 67% 0.28 337;
    --header-opacity: 0;
    --header-visible: 1;
    --header-height: 3.75rem;
    --focus-outline-width: 0.125rem;
    --nav-width: clamp(0rem, 100dvw, 25rem);
    --nav-dir: 1;
    scrollbar-gutter: stable;

    &[dir='rtl'] {
      --nav-dir: -1;
    }
  }

  *,
  *::after,
  *::before {
    box-sizing: border-box;
  }

  html {
    background: oklch(var(--light));
    color: oklch(var(--dark));
    font-family: 'Raleway', sans-serif;
  }

  .translated-rtl {
    direction: rtl;
  }

  body {
    margin: 0;
    min-height: 100dvh;
    padding: 0;
  }

  a[href],
  button,
  [tabindex='-1'] {
    color: currentColor;
    transition: color 200ms ease;

    &:focus {
      outline: none;
    }

    &:focus-visible {
      outline: var(--focus-outline-width) solid oklch(var(--magenta));
    }

    &:hover {
      color: oklch(var(--magenta));
    }
  }

  img {
    border: 0;
    display: block;
    height: auto;
    max-width: 100%;
  }

  button {
    background: transparent;
    appearance: none;
    border: none;
    outline: none;

    &:hover {
      cursor: pointer;
    }
  }
}

@keyframes nav-open {
  from {
    transform: translateX(calc(var(--nav-dir) * var(--nav-width)));
  }
  to {
    transform: translateZ(0);
  }
}

@keyframes nav-close {
  from {
    transform: translateZ(0);
  }
  to {
    transform: translateX(calc(var(--nav-dir) * var(--nav-width)));
  }
}

@keyframes nav-backdrop-open {
  from {
    background: rgb(0, 0, 0, 0);
  }
  to {
    background: rgb(0, 0, 0, 0.2);
  }
}

@keyframes nav-backdrop-close {
  from {
    background: rgb(0, 0, 0, 0.2);
  }
  to {
    background: rgb(0, 0, 0, 0);
  }
}

@layer components {
  .Top {
    align-items: center;
    background: oklch(var(--white));
    display: flex;
    height: var(--header-height);
    outline-offset: calc(-2 * var(--focus-outline-width));
    padding: 0.5rem 1rem;
    position: absolute;
    z-index: 10000;
    
    &:not(:focus) {
      clip: rect(0 0 0 0);
      clip-path: inset(50%);
      height: 1px;
      overflow: hidden;
      padding: 0;
      position: absolute;
      width: 1px;
      white-space: nowrap;
    }
  }

  .Header {
    align-items: center;
    background: oklch(var(--white) / var(--header-opacity));
    display: flex;
    height: var(--header-height);
    justify-content: space-between;
    padding: 0.5rem 1rem;
  }

  .Header--sticky {
    position: sticky;
    top: 0;

    :where(.Script) & {
      transform: translateY(calc((1 - var(--header-visible)) * -100%));
      transition: transform 300ms linear 100ms;
    }
  }

  .Nav {
    background: transparent;
    border: 0;
    height: 100%;
    margin: 0;
    overflow: hidden;
    padding: 0;
    max-height: none;
    max-width: none;
    width: 100%;

    &::backdrop {
      background: rgb(0, 0, 0, 0.2);
    }

    &[open] {
      animation: nav-open 500ms ease;

      &::backdrop {
        animation: nav-backdrop-open 500ms ease;
      }
    }

    &.nav-close {
      animation: nav-close 500ms ease;

      &::backdrop {
        animation: nav-backdrop-close 500ms ease;
      }
    }
  }

  .Nav__body {
    background: oklch(var(--white));
    box-shadow: 0 0 2rem rgb(0, 0, 0, 0.2);
    inset: 0;
    inset-inline-start: auto;
    height: 100%;
    max-width: var(--nav-width);
    position: absolute;
    pointer-events: none;
    width: 100%;

    & > * {
      min-width: 0;
      pointer-events: auto;
    }
  }

  .Nav__header {
    align-items: center;
    background: oklch(var(--white));
    display: flex;
    flex-shrink: 0;
    height: var(--header-height);
    justify-content: space-between;
    padding: 0.5rem 1rem;
    position: sticky;
    top: 0;
  }

  .Nav__heading {
    font-size: 1rem;
    margin: 0;
  }

  .Nav__menu {
    background: oklch(var(--white));
    border: 0;
    height: auto;
    inset: 0;
    inset-inline-start: auto;
    list-style: none;
    margin: 0;
    margin-block-start: var(--header-height);
    max-width: var(--nav-width);
    min-height: calc(100dvh - var(--header-height));
    overflow-x: hidden;
    overflow-y: auto;
    padding: 0.5rem;
    position: fixed;
    pointer-events: auto;
    width: 100%;
    -webkit-overflow-scrolling: touch;

    &:popover-open {
      animation: nav-open 500ms ease;
    }

    &.popover-close {
      animation: nav-close 500ms ease;
    }

    .nav-close &[popover] {
      animation: nav-close 500ms ease;
    }
  }

  .Nav__item {
    margin: 0;

    &:not(:last-of-type) {
      border-bottom: 0.0625rem solid black;
    }
  }

  .Nav__link {
    align-items: center;
    border-radius: 0.125rem;
    display: block;
    font-size: 1rem;
    font-weight: 400;
    padding: 0.5rem;
    text-decoration: none;
    line-height: 1.5;
    text-align: start;
    width: 100%;
  }

  .Hamburger {
    align-items: center;
    background: oklch(var(--magenta));
    border-radius: 0.625rem;
    color: oklch(var(--white));
    display: flex;
    outline-offset: 0.125rem;
    padding: 0.5rem 0.75rem;
    text-decoration: none;
    font-size: 1rem;
    justify-content: center;
    font-weight: 700;
    line-height: 1.5;
    text-align: center;
  }

  .Main,
  .Footer {
    --padding: clamp(1rem, 5dvw, 3rem);
    margin: 0 auto;
    max-width: calc(75rem + 10dvw);
    padding: var(--padding);
    width: 100%;

    & > *:first-child {
      margin-block-start: 0;
    }

    & + & {
      padding-block-start: 0;
    }

    & > h1,
    & > h2,
    & > h3 {
      line-height: 1.25;
      margin-block: 1.5rem 1rem;
    }

    & > ul {
      margin-block: 1.5rem;
      padding-inline: 2rem 0;

      & li {
        margin-block: 0.5rem;
      }
    }

    & > p {
      margin-block: 1rem;
    }
  }
}

@layer utilities {
  .Hidden {
    border: 0;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
    white-space: nowrap;
  }
}

@media (prefers-reduced-motion) {
  .Nav,
  .Nav *,
  .Header {
    animation: none;
    transition: none;
  }
}