/* ambient mario-inspired pixel page */

:root {
  --sky: #6b8cff;
  --sky-deep: #5a7bf0;
  --ink: #1d2240;
  --block-fallback: #f7c531;
  --shadow-brown: #8a5a00;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
}

body {
  background: linear-gradient(180deg, var(--sky-deep) 0%, var(--sky) 55%, #8fb0ff 100%);
  font-family: "Courier New", Courier, monospace;
  color: var(--ink);
  overflow-x: hidden;
}

#scene {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  image-rendering: pixelated;
  pointer-events: none;
}

main {
  position: relative;
  z-index: 1;
  min-height: 66vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px 12px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ----------------------------------------------------------- blocks */

.word {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  column-gap: 14px;
  row-gap: 64px; /* leaves headroom for the floating telegraph icons */
  margin-top: 10vh;
}

.trio {
  display: flex;
  gap: 14px;
}

.block {
  position: relative;
  width: 96px;
  height: 96px;
  padding: 0;
  border: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--block-fallback);
  background-repeat: no-repeat;
  image-rendering: pixelated;
  animation: bob 3.2s ease-in-out infinite;
  animation-delay: var(--bob-delay, 0s);
}

.block.has-sprite { background-color: transparent; }

.block.is-link {
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  filter: drop-shadow(0 0 9px rgba(255, 243, 130, 0.95));
}

.block:focus { outline: none; }

.block:focus-visible {
  outline: 4px solid #ffffff;
  outline-offset: 4px;
  box-shadow: 0 0 0 8px rgba(255, 255, 255, 0.35), 0 0 24px 8px rgba(255, 244, 150, 0.8);
}

.letter {
  width: 52%;
  height: 60%;
  fill: #ffffff;
  filter: drop-shadow(2px 2px 0 var(--shadow-brown));
  shape-rendering: crispEdges;
  pointer-events: none;
}

@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}

.block.bumping {
  animation: bump 0.45s steps(12) 1;
}

@keyframes bump {
  0%   { transform: translateY(0) scale(1, 1); }
  30%  { transform: translateY(-24px) scale(0.94, 1.08); }
  55%  { transform: translateY(3px) scale(1.14, 0.8); }
  78%  { transform: translateY(-5px) scale(0.97, 1.05); }
  100% { transform: translateY(0) scale(1, 1); }
}

/* small icon floating above each link block, telegraphing its action */
.tele-icon {
  position: absolute;
  left: 50%;
  bottom: 100%;
  margin-bottom: 10px;
  background-repeat: no-repeat;
  image-rendering: pixelated;
  pointer-events: none;
  opacity: 0.95;
  transition: opacity 0.15s;
  animation: tele-bob 2.8s ease-in-out infinite;
  animation-delay: var(--tele-delay, 0s);
}

.tele-icon.hidden { opacity: 0; }

@keyframes tele-bob {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, -6px); }
}

/* icon that pops out of a bumped block */
.pop-icon {
  position: absolute;
  left: 50%;
  top: 0;
  width: 48px;
  height: 48px;
  margin-left: -24px;
  background-repeat: no-repeat;
  image-rendering: pixelated;
  pointer-events: none;
  opacity: 0;
}

.legend {
  margin-top: 42px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 10px;
  font-size: 12px;
  font-weight: bold;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.92);
  text-shadow: 2px 2px 0 rgba(29, 34, 64, 0.45);
  transition: opacity 0.6s;
}

.legend b {
  color: #ffe27a;
}

.legend-dot { opacity: 0.6; }

.legend.faded { opacity: 0.45; }

/* ----------------------------------------------------------- dialog */

dialog#about-dialog {
  border: 0;
  padding: 0;
  background: transparent;
  max-width: min(560px, calc(100vw - 32px));
}

dialog#about-dialog::backdrop {
  background: rgba(20, 24, 48, 0.65);
}

.dialog-frame {
  position: relative;
  background: #fdf6e3;
  color: var(--ink);
  border: 4px solid var(--ink);
  box-shadow: 8px 8px 0 rgba(29, 34, 64, 0.55);
  padding: 28px 30px 26px;
}

.dialog-frame::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 2px dashed rgba(29, 34, 64, 0.25);
  pointer-events: none;
}

.dialog-frame h2 {
  margin: 0 0 14px;
  font-size: 22px;
  letter-spacing: 0.3em;
}

.dialog-frame p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.65;
}

.dialog-frame p:last-child { margin-bottom: 0; }

.dialog-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 3px solid var(--ink);
  background: #e0533d;
  color: #ffffff;
  font-size: 16px;
  font-family: inherit;
  font-weight: bold;
  cursor: pointer;
  line-height: 1;
}

.dialog-close:hover { background: #f06a52; }

.dialog-close:focus-visible {
  outline: 4px solid #ffffff;
  outline-offset: 2px;
}

/* --------------------------------------------------------- noscript */

.noscript-card {
  margin-top: 36px;
  max-width: 480px;
  background: #fdf6e3;
  border: 4px solid var(--ink);
  box-shadow: 8px 8px 0 rgba(29, 34, 64, 0.55);
  padding: 22px 26px;
  text-align: center;
}

.noscript-name {
  font-weight: bold;
  font-size: 20px;
  letter-spacing: 0.25em;
  margin: 0 0 12px;
}

.noscript-card a { color: #2456c4; }

/* --------------------------------------------------- reduced motion */

@media (prefers-reduced-motion: reduce) {
  .block { animation: none; }
  .block.bumping { animation: none; }
  .pop-icon { display: none; }
  .tele-icon { animation: none; }
}