/* --- Main --- */
main {
  position: relative;
  z-index: var(--z-main);
  width: 100%;
  max-width: 56rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.view-home {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

.view-downloads {
  width: 100%;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* After .view-* display rules: inactive views must not use flex layout or stack under home. */
main > [data-view][hidden] {
  display: none !important;
}

/* `view-boot.js`: `/downloads` first paint before `index.js` (static home h1/p are in HTML). */
html[data-initial-view="downloads"] main > [data-view="home"] {
  display: none !important;
}

html[data-initial-view="downloads"] main > [data-view="downloads"][hidden] {
  display: flex !important;
}

/* No visible text till `index.js` clears data-initial-view (fonts/JS race on first paint). */
html[data-initial-view] main > [data-view] {
  opacity: 0;
}

/* Full visual viewport width so the menu stays the same distance from the window edge when a classic
   scrollbar narrows the layout viewport (Chromium). `.menu-wrap` is absolute inside. */
.menu-anchor {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  pointer-events: none;
  z-index: var(--z-menu-wrap);
}

/* Fixed to the viewport so the menu stays put when main height changes
   (body vertically centers main; a shorter downloads view moves main's top down). */
.menu-wrap {
  position: absolute;
  top: 2.5rem;
  right: 1.25rem;
  pointer-events: auto;
}

@media (width < 768px) {
  .menu-wrap {
    top: 1rem;
    right: 1rem;
  }
}

/* No title/tagline until Neucha is ready; see `fonts-boot.js`. */
html:not(.fonts-ready) .hero-title,
html:not(.fonts-ready) .hero-tagline {
  opacity: 0;
}

.hero-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.25rem, 6vw, 4.25rem);
  letter-spacing: 0.06em;
  line-height: 1.15;
  text-shadow:
    0 1px 0 var(--color-hero-text-shadow-bg),
    0 2px 10px var(--color-hero-text-shadow-ink);
}

.hero-tagline {
  margin: 1rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(0.95rem, 2.2vw, 1.3rem);
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-ink);
  text-shadow:
    0 1px 0 var(--color-hero-text-shadow-bg),
    0 2px 10px var(--color-hero-text-shadow-ink);
}

/* Hero section screenshot frame (main game image on landing view). */
.hero-image {
  user-select: none;
  -webkit-user-select: none;
  --meander-unit: 25px;
  --meander-gap: 20px;
  margin: 2.75rem auto 2.5rem;
  position: relative;
  width: 100%;
  max-width: min(36rem, 92vw);
  padding: var(--meander-gap);
}

/* Decorative Greek-key meander border strips around the screenshot frame. */
.hero-image::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: calc(var(--radius-image) + var(--meander-gap));
  pointer-events: none;
  background: var(--color-ink);
  -webkit-mask:
    var(--meander-tile-h-top) top left / var(--meander-unit) var(--meander-gap)
      repeat-x,
    var(--meander-tile-h-bottom) bottom left / var(--meander-unit)
      var(--meander-gap) repeat-x,
    var(--meander-tile-v-left) top left / var(--meander-gap) var(--meander-unit)
      repeat-y,
    var(--meander-tile-v-right) top right / var(--meander-gap)
      var(--meander-unit) repeat-y;
  mask:
    var(--meander-tile-h-top) top left / var(--meander-unit) var(--meander-gap)
      repeat-x,
    var(--meander-tile-h-bottom) bottom left / var(--meander-unit)
      var(--meander-gap) repeat-x,
    var(--meander-tile-v-left) top left / var(--meander-gap) var(--meander-unit)
      repeat-y,
    var(--meander-tile-v-right) top right / var(--meander-gap)
      var(--meander-unit) repeat-y;
}

/* Corner disks (ink) with a theta (bg color) centred on each, covering meander seam glitches. */
.hero-image::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: calc(var(--radius-image) + var(--meander-gap));
  pointer-events: none;
  background:
    var(--corner-theta) top left / calc(var(--meander-gap) * 1.4)
      calc(var(--meander-gap) * 1.4) no-repeat,
    var(--corner-theta) top right / calc(var(--meander-gap) * 1.4)
      calc(var(--meander-gap) * 1.4) no-repeat,
    var(--corner-theta) bottom left / calc(var(--meander-gap) * 1.4)
      calc(var(--meander-gap) * 1.4) no-repeat,
    var(--corner-theta) bottom right / calc(var(--meander-gap) * 1.4)
      calc(var(--meander-gap) * 1.4) no-repeat,
    radial-gradient(
        circle,
        var(--color-ink) 0 72%,
        var(--color-transparent) 74%
      )
      top left / calc(var(--meander-gap) * 1.4) calc(var(--meander-gap) * 1.4)
      no-repeat,
    radial-gradient(
        circle,
        var(--color-ink) 0 72%,
        var(--color-transparent) 74%
      )
      top right / calc(var(--meander-gap) * 1.4) calc(var(--meander-gap) * 1.4)
      no-repeat,
    radial-gradient(
        circle,
        var(--color-ink) 0 72%,
        var(--color-transparent) 74%
      )
      bottom left / calc(var(--meander-gap) * 1.4)
      calc(var(--meander-gap) * 1.4) no-repeat,
    radial-gradient(
        circle,
        var(--color-ink) 0 72%,
        var(--color-transparent) 74%
      )
      bottom right / calc(var(--meander-gap) * 1.4)
      calc(var(--meander-gap) * 1.4) no-repeat;
}

.hero-image img {
  position: relative;
  z-index: var(--z-hero-image);
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 800 / 439;
  object-fit: cover;
  object-position: center;
  border-radius: var(--radius-image);
  box-shadow: var(--shadow-soft);
}

@media (width >= 768px) {
  .hero-image {
    margin: 3.25rem 0 2.75rem;
    max-width: min(40rem, 88vw);
  }
}

.carousel-arrow {
  position: absolute;
  top: 50%;
  z-index: var(--z-carousel-arrow);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: 1px solid var(--carousel-arrow-border);
  border-radius: 999px;
  background: var(--carousel-arrow-bg);
  color: var(--carousel-arrow-color);
  box-shadow: var(--carousel-arrow-shadow);
  cursor: pointer;
  transform: translateY(-50%);
}

.carousel-arrow--left {
  left: calc(var(--meander-gap) + 0.2rem);
}

.carousel-arrow--right {
  right: calc(var(--meander-gap) + 0.2rem);
}

.carousel-arrow:hover {
  background: var(--carousel-arrow-hover-bg);
  border-color: var(--carousel-arrow-hover-border);
  box-shadow: var(--carousel-arrow-hover-shadow);
}

.carousel-arrow:focus-visible {
  outline: 2px solid var(--carousel-arrow-focus-outline);
  outline-offset: 2px;
}

.carousel-arrow svg {
  width: 1rem;
  height: 1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

@media (prefers-reduced-motion: no-preference) {
  /* First paint: match fade-in-up "from" before animation runs (index.js). */
  [data-view].initial-entrance .hero-title,
  [data-view].initial-entrance .hero-tagline {
    opacity: 0;
    transform: translateY(12px);
    animation: none;
  }

  html.fonts-ready
    [data-view].initial-entrance.initial-entrance--run
    .hero-title {
    animation: fade-in-up 0.9s ease-out forwards;
  }

  html.fonts-ready
    [data-view].initial-entrance.initial-entrance--run
    .hero-tagline {
    animation: fade-in-up 0.9s ease-out 0.1s forwards;
  }

  .view-home .hero-image {
    opacity: 0;
    animation: fade-in-up 0.9s ease 0.2s forwards;
  }

  .carousel-arrow {
    transition:
      background 0.2s ease,
      border-color 0.2s ease,
      box-shadow 0.2s ease,
      transform 0.15s ease;
  }

  .carousel-arrow:active {
    transform: translateY(calc(-50% + 1px));
  }

  /* Home <-> downloads (View Transitions API; paired with runViewChange in index.js). */
  main > [data-view] {
    view-transition-name: spa-view;
  }

  .hero-title {
    view-transition-name: hero-heading;
  }

  @keyframes spa-view-fade-out {
    to {
      opacity: 0;
      transform: translateY(-10px);
    }
  }

  @keyframes spa-view-fade-in {
    from {
      opacity: 0;
      transform: translateY(10px);
    }
  }

  ::view-transition-old(spa-view) {
    animation: spa-view-fade-out 0.2s ease both;
  }

  ::view-transition-new(spa-view) {
    animation: spa-view-fade-in 0.2s ease both;
  }
}