/* Cave listening page. Pixel geometry is built from 4px steps; nothing is
   rounded. One bold element (the live cave canvas); the rest stays quiet. */
:root {
  color-scheme: dark;
  --ink: #0e0c16;
  --stone: #2b2535;
  --stone-hi: #4b4057;
  --stone-lo: #1a1520;
  --text: #f0e4c8;
  --muted: #b9ab95;
  --torch: #ffb347;
  --accent: #62f0cf;
  --px: 4px;
  --pixel: "Pixelify Sans", "Microsoft YaHei", "PingFang SC", sans-serif;
  --body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}
body {
  margin: 0;
  min-height: 100vh;
  background: var(--ink);
  color: var(--text);
  font: 16px/1.75 var(--body);
}
#cave {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  image-rendering: pixelated;
  z-index: 0;
}
/* Optional scanlines; the toggle is remembered between visits. */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 20;
  opacity: 0;
  background: repeating-linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.22) 0 1px,
    transparent 1px 3px
  );
}
body.crt::after {
  opacity: 1;
}
.page {
  position: relative;
  z-index: 1;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 32px;
}
a {
  color: var(--torch);
  text-underline-offset: 3px;
}
a:hover {
  color: #ffd28a;
}
:focus-visible {
  outline: var(--px) solid var(--torch);
  outline-offset: 2px;
}
.skip {
  position: absolute;
  left: -999px;
  top: 8px;
  z-index: 30;
  padding: 8px 12px;
  background: var(--torch);
  color: var(--ink);
}
.skip:focus {
  left: 8px;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

/* Stepped stone bevel shared by slabs and buttons. */
.stone {
  background: var(--stone);
  box-shadow:
    inset 0 var(--px) 0 var(--stone-hi),
    inset 0 calc(var(--px) * -1) 0 var(--stone-lo),
    0 var(--px) 0 #07050b;
}

/* Header ------------------------------------------------------------- */
.masthead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  font-family: var(--pixel);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-size: 18px;
  font-weight: 600;
}
.brand-mark {
  width: 24px;
  height: 24px;
  fill: var(--accent);
  shape-rendering: crispEdges;
}
.brand-mark .spark {
  fill: #fff;
}
nav {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
nav a {
  color: var(--text);
  text-decoration: none;
}
nav a:hover {
  color: var(--torch);
}
#crt-toggle {
  font: inherit;
  color: var(--muted);
  background: none;
  border: 0;
  padding: 4px 0;
  cursor: pointer;
}
#crt-toggle:hover {
  color: var(--text);
}

/* Hero: text sits bottom-left, leaving the Core visible on the right. */
.hero {
  min-height: calc(100vh - 80px);
  min-height: calc(100svh - 80px);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 48px 0 12vh;
  max-width: 600px;
}
h1 {
  margin: 0 0 20px;
  font-size: clamp(38px, 6.4vw, 72px);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: 0.02em;
  text-shadow:
    var(--px) var(--px) 0 #07050b,
    0 0 24px rgba(98, 240, 207, 0.18);
}
.intro {
  margin: 0 0 28px;
  max-width: 34em;
  color: var(--text);
  font-size: 17px;
  text-shadow: 2px 2px 0 #07050b;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.hero-actions p {
  margin: 0;
  max-width: 22em;
  color: var(--muted);
  font-size: 14px;
  text-shadow: 2px 2px 0 #07050b;
}
.button {
  font:
    600 18px/1 var(--pixel),
    var(--body);
  color: var(--ink);
  background: var(--torch);
  border: 0;
  padding: 16px 22px 18px;
  cursor: pointer;
  box-shadow:
    inset 0 var(--px) 0 #ffd9a0,
    inset 0 calc(var(--px) * -1) 0 #c97a1f,
    0 var(--px) 0 #07050b;
}
.button:hover {
  background: #ffc36a;
}
.button:active {
  transform: translateY(var(--px));
  box-shadow:
    inset 0 var(--px) 0 #c97a1f,
    0 0 0 #07050b;
}

/* Track list --------------------------------------------------------- */
#collection {
  padding: 40px 0 24px;
}
.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 32px;
  align-items: end;
  margin-bottom: 32px;
}
h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.2;
  text-shadow: var(--px) var(--px) 0 #07050b;
}
.section-heading p {
  margin: 0;
  color: var(--muted);
  text-shadow: 2px 2px 0 #07050b;
}
.loading,
.noscript {
  padding: 24px;
  background: rgba(14, 12, 22, 0.86);
}
#tracks {
  display: grid;
  gap: 40px;
}

/* Each track is a slab of stone with notched corners and an ore vein. */
.track {
  --biome: #a6ea6c;
  --biome-2: #ffc65c;
  position: relative;
  padding: 32px 36px 28px 52px;
  background: rgba(36, 30, 45, 0.94);
  clip-path: polygon(
    0 8px,
    4px 8px,
    4px 4px,
    8px 4px,
    8px 0,
    calc(100% - 8px) 0,
    calc(100% - 8px) 4px,
    calc(100% - 4px) 4px,
    calc(100% - 4px) 8px,
    100% 8px,
    100% calc(100% - 8px),
    calc(100% - 4px) calc(100% - 8px),
    calc(100% - 4px) calc(100% - 4px),
    calc(100% - 8px) calc(100% - 4px),
    calc(100% - 8px) 100%,
    8px 100%,
    8px calc(100% - 4px),
    4px calc(100% - 4px),
    4px calc(100% - 8px),
    0 calc(100% - 8px)
  );
  box-shadow:
    inset 0 var(--px) 0 var(--stone-hi),
    inset 0 calc(var(--px) * -2) 0 var(--stone-lo);
}
.biome-crystal {
  --biome: #72e4ff;
  --biome-2: #b892ff;
}
.biome-lava {
  --biome: #ff6d3a;
  --biome-2: #ffd23f;
}
/* The vein: a pixel column of ore down the slab's left edge. */
.vein {
  position: absolute;
  left: 16px;
  top: 28px;
  bottom: 28px;
  width: 12px;
  background:
    linear-gradient(var(--biome), var(--biome)) 4px 0 / 4px 12px repeat-y,
    linear-gradient(var(--biome-2), var(--biome-2)) 0 16px / 4px 28px repeat-y,
    linear-gradient(var(--biome), var(--biome)) 8px 8px / 4px 20px repeat-y;
  opacity: 0.55;
}
.track.playing .vein {
  opacity: 1;
  animation: vein 1.2s steps(2) infinite;
}
@keyframes vein {
  50% {
    filter: brightness(1.45);
  }
}
@media (prefers-reduced-motion: reduce) {
  .track.playing .vein {
    animation: none;
  }
}
.track-head {
  display: flex;
  gap: 20px;
  align-items: center;
}
.sigil {
  width: 60px;
  height: 60px;
  flex: none;
  background: var(--stone-lo);
  padding: 6px;
}
.sigil .s-frame {
  fill: #7d6e86;
}
.sigil .s-hot {
  fill: var(--biome);
}
.sigil .s-warm {
  fill: var(--biome-2);
}
.setting {
  margin: 0;
  color: var(--biome);
  font-size: 14px;
}
h3 {
  margin: 0;
  font-size: clamp(26px, 3.4vw, 34px);
  line-height: 1.25;
}
.english {
  margin: 2px 0 0;
  font-family: var(--pixel);
  color: var(--muted);
}
.description {
  margin: 20px 0 22px;
  max-width: 44em;
}

/* Transport: play, seek with section notches, time, loop. */
.transport {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  gap: 14px;
  align-items: center;
}
.play {
  width: 52px;
  height: 52px;
  border: 0;
  cursor: pointer;
  font: 700 18px/1 var(--pixel);
  color: var(--ink);
  background: var(--biome);
  box-shadow:
    inset 0 var(--px) 0 rgba(255, 255, 255, 0.45),
    inset 0 calc(var(--px) * -1) 0 rgba(0, 0, 0, 0.3),
    0 var(--px) 0 #07050b;
}
.play:active {
  transform: translateY(var(--px));
  box-shadow: inset 0 var(--px) 0 rgba(0, 0, 0, 0.3);
}
.bar {
  position: relative;
  height: 24px;
}
.seek {
  --progress: 0%;
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  height: 24px;
  margin: 0;
  background: transparent;
  cursor: pointer;
}
.seek::-webkit-slider-runnable-track {
  height: 12px;
  background:
    linear-gradient(var(--biome), var(--biome)) 0 0 / var(--progress) 100%
      no-repeat,
    var(--stone-lo);
  box-shadow: inset 0 -4px 0 rgba(0, 0, 0, 0.35);
}
.seek::-moz-range-track {
  height: 12px;
  background: var(--stone-lo);
}
.seek::-moz-range-progress {
  height: 12px;
  background: var(--biome);
}
.seek::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 20px;
  margin-top: -4px;
  border: 0;
  background: var(--text);
  box-shadow: inset 0 -4px 0 #9d8f78;
}
.seek::-moz-range-thumb {
  width: 12px;
  height: 20px;
  border: 0;
  border-radius: 0;
  background: var(--text);
}
.markers i {
  position: absolute;
  top: 2px;
  width: 4px;
  height: 20px;
  margin-left: -2px;
  background: var(--text);
  opacity: 0.45;
  pointer-events: none;
}
.time {
  font-family: var(--pixel);
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  white-space: nowrap;
}
.loop {
  font:
    600 14px/1 var(--pixel),
    var(--body);
  color: var(--muted);
  background: var(--stone-lo);
  border: 0;
  padding: 10px 12px;
  cursor: pointer;
}
.loop[aria-pressed="true"] {
  color: var(--ink);
  background: var(--biome-2);
}
.audio-error {
  margin: 10px 0 0;
  color: #ff9a8a;
}

.structure {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}
.jump {
  font: 14px/1.4 var(--body);
  color: var(--text);
  background: rgba(14, 12, 22, 0.55);
  border: 0;
  padding: 6px 12px;
  cursor: pointer;
}
.jump:hover {
  background: var(--stone-lo);
  color: var(--biome);
}
.jump b {
  font-family: var(--pixel);
  font-weight: 600;
  color: var(--biome);
  margin-right: 8px;
}

.track-detail {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 32px;
  margin-top: 28px;
  padding-top: 24px;
  border-top: var(--px) solid var(--stone-lo);
}
h4 {
  margin: 0 0 10px;
  font-size: 15px;
  color: var(--muted);
}
.features {
  margin: 0;
  padding: 0;
  list-style: none;
}
.features li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 6px;
}
.features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  background: var(--biome);
  box-shadow: 4px 4px 0 var(--biome-2);
}
.meta {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(92px, 1fr));
  gap: 14px 18px;
  margin: 0;
}
.meta dt {
  color: var(--muted);
  font-size: 13px;
}
.meta dd {
  margin: 0;
  font:
    600 18px/1.3 var(--pixel),
    var(--body);
}

details {
  margin-top: 20px;
}
summary {
  cursor: pointer;
  color: var(--text);
  font-weight: 600;
  width: fit-content;
  list-style: none;
}
summary::-webkit-details-marker {
  display: none;
}
summary::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 10px;
  background: var(--biome);
  clip-path: polygon(0 0, 100% 50%, 0 100%);
  vertical-align: 1px;
}
details[open] > summary::before {
  clip-path: polygon(0 0, 100% 0, 50% 100%);
}
.prompt p {
  margin: 12px 0 0;
  padding: 16px 18px;
  max-width: 48em;
  background: rgba(14, 12, 22, 0.6);
  color: var(--muted);
  font-size: 15px;
}
.prompt-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 10px;
  max-width: 48em;
}
.prompt-foot small {
  color: var(--muted);
}
.copy {
  font: 14px/1 var(--body);
  color: var(--ink);
  background: var(--text);
  border: 0;
  padding: 10px 14px;
  cursor: pointer;
  box-shadow: inset 0 -4px 0 #9d8f78;
}
.downloads {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 22px;
}
.downloads a {
  font-weight: 600;
}
.music-credits p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
}

/* Closing notes and footer ------------------------------------------- */
.take-home {
  margin: 56px 0 0;
  padding: 32px 36px;
  background: rgba(14, 12, 22, 0.9);
  box-shadow: inset 0 var(--px) 0 var(--stone);
}
.take-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 16px;
}
.take-columns p {
  margin: 0;
  color: var(--muted);
}
footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  padding: 36px 0 48px;
  color: var(--muted);
  font-size: 14px;
  text-shadow: 2px 2px 0 #07050b;
}
footer p {
  margin: 0;
  max-width: 40em;
}

@media (max-width: 760px) {
  .page {
    padding: 0 16px;
  }
  .masthead {
    padding: 14px 0;
  }
  .brand span {
    font-size: 15px;
  }
  nav {
    gap: 14px;
    font-size: 14px;
  }
  .hero {
    padding-bottom: 8vh;
  }
  .section-heading,
  .track-detail,
  .take-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }
  .track {
    padding: 24px 18px 22px 38px;
  }
  .vein {
    left: 10px;
    width: 8px;
  }
  .sigil {
    width: 48px;
    height: 48px;
  }
  .transport {
    grid-template-columns: auto minmax(0, 1fr) auto;
  }
  .time {
    grid-column: 2;
    grid-row: 2;
    font-size: 13px;
  }
  .loop {
    grid-column: 3;
    grid-row: 1 / span 2;
  }
  .take-home {
    padding: 24px 20px;
  }
}
.brand span {
  white-space: nowrap;
}
@media (max-width: 420px) {
  .masthead nav a[href="#collection"] {
    display: none;
  }
  .english .tag {
    display: inline-block;
  }
}
.biome-tavern {
  --biome: #ffc861;
  --biome-2: #ff8f4a;
}
.biome-dawn {
  --biome: #fff1b8;
  --biome-2: #9fd0ff;
}
#lang-toggle {
  font:
    600 14px/1 var(--pixel),
    var(--body);
  color: var(--ink);
  background: var(--text);
  border: 0;
  padding: 8px 10px 9px;
  cursor: pointer;
  box-shadow: inset 0 -3px 0 #9d8f78;
}
#lang-toggle:hover {
  background: #fff6e0;
}
.english .alt-title {
  margin-right: 10px;
}
.english .tag {
  padding: 0 8px;
  color: var(--ink);
  background: var(--biome);
  font-size: 13px;
  white-space: nowrap;
}
@media (max-width: 420px) {
  .masthead {
    flex-wrap: wrap;
  }
  .masthead nav a[href*="github"] {
    display: none;
  }
}
/* Latin text sets wider than CJK at the same size. */
html[lang="en"] h1 {
  font-size: clamp(34px, 5vw, 58px);
  letter-spacing: 0;
}
html[lang="en"] .hero {
  max-width: 660px;
}