:root {
  --abyss: #0d5961;
  --deep: #32bfc4;
  --water: #66d9d0;
  --foam: #123f43;
  --mist: #477777;
  --lime: #e4ef68;
  --coral: #f57572;
  --lilac: #d582d2;
  --sky: #168da9;
  --line: rgba(15, 89, 96, 0.18);
  --paper: rgba(255, 250, 226, 0.92);
  font-family: "Avenir Next", "Segoe UI", system-ui, sans-serif;
  color: var(--foam);
  background: #a8e4d8;
}

* { box-sizing: border-box; }

html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  background:
    radial-gradient(circle at 80% -10%, rgba(255, 241, 157, 0.72), transparent 42%),
    #8bded5;
}

button, canvas { -webkit-tap-highlight-color: transparent; }
button { font: inherit; color: inherit; }

.game-shell {
  position: relative;
  display: grid;
  grid-template-rows: 68px 1fr;
  width: 100%;
  height: 100dvh;
  min-height: 560px;
  background: var(--water);
}

.topbar {
  position: relative;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(300px, 440px) minmax(180px, 1fr);
  align-items: center;
  gap: 30px;
  padding: 0 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 250, 227, 0.96);
  backdrop-filter: blur(14px);
}

.brand { display: flex; align-items: center; gap: 11px; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  aspect-ratio: 1;
  border: 1px solid var(--coral);
  border-radius: 50%;
  color: var(--coral);
  font: 700 19px/1 Georgia, serif;
}
.brand strong { display: block; letter-spacing: 0.13em; font-size: 14px; }
.brand small { display: block; margin-top: 1px; color: var(--mist); font: italic 12px/1.2 Georgia, serif; }

.meters { display: grid; gap: 7px; }
.meter-group { display: grid; grid-template-columns: 42px 1fr 28px; align-items: center; gap: 8px; }
.meter-label { color: var(--mist); font-size: 8px; font-weight: 700; letter-spacing: 0.14em; }
.meter-track { height: 5px; overflow: hidden; border-radius: 9px; background: rgba(13,89,97,.13); }
.meter-track i { display: block; width: 100%; height: 100%; border-radius: inherit; background: var(--coral); transition: width 180ms ease; }
.energy .meter-track i { background: var(--sky); }
.meter-group b { font-size: 10px; font-variant-numeric: tabular-nums; }

.scoreboard { display: flex; justify-content: flex-end; gap: 16px; color: var(--mist); font-size: 10px; letter-spacing: .04em; }
.scoreboard b { color: var(--foam); font-size: 13px; }

.stage { position: relative; min-height: 0; overflow: hidden; isolation: isolate; }
#gameCanvas { display: block; width: 100%; height: 100%; outline: none; cursor: crosshair; }

.stage::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(255, 249, 214, .10), transparent 28%, transparent 78%, rgba(15, 116, 126, .12)),
    repeating-linear-gradient(0deg, rgba(255,255,255,.018) 0, rgba(255,255,255,.018) 1px, transparent 1px, transparent 5px);
}

.current-card {
  position: absolute;
  z-index: 5;
  top: 18px;
  left: 22px;
  display: flex;
  align-items: center;
  gap: 11px;
  min-width: 170px;
  padding: 9px 13px 9px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  box-shadow: 0 12px 40px rgba(19,91,92,.14);
  backdrop-filter: blur(10px);
}
.current-key {
  display: grid;
  place-items: center;
  width: 40px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: #fff2a8;
  color: var(--abyss);
  font: 700 21px/1 Georgia, serif;
  box-shadow: 0 0 24px rgba(255, 240, 149, .52);
}
.current-card small { display: block; margin-bottom: 1px; color: var(--mist); font-size: 7px; font-weight: 700; letter-spacing: .16em; }
.current-card strong { display: block; font-size: 12px; letter-spacing: .07em; }
.current-card em { display: block; color: var(--mist); font: italic 10px/1.2 Georgia, serif; }

.quest-card {
  position: absolute;
  z-index: 5;
  top: 18px;
  right: 22px;
  display: flex;
  align-items: center;
  gap: 10px;
  width: 228px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper);
  box-shadow: 0 12px 40px rgba(19,91,92,.13);
  backdrop-filter: blur(10px);
}
.quest-compass {
  display: grid;
  place-items: center;
  width: 35px;
  aspect-ratio: 1;
  flex: 0 0 auto;
  border: 1px solid rgba(245,117,114,.45);
  border-radius: 50%;
  color: var(--coral);
  font-size: 18px;
}
.quest-copy { min-width: 0; flex: 1; }
.quest-copy > small { display: block; color: var(--mist); font-size: 7px; font-weight: 800; letter-spacing: .14em; }
.quest-copy > small b { color: var(--coral); }
.quest-copy > strong { display: block; margin: 2px 0 5px; overflow: hidden; color: var(--foam); font-size: 10px; letter-spacing: .04em; text-overflow: ellipsis; white-space: nowrap; }
.quest-copy > em { display: block; margin-top: 4px; color: var(--mist); font: italic 8px/1 Georgia, serif; }
.quest-progress { display: block; height: 4px; overflow: hidden; border-radius: 8px; background: rgba(13,89,97,.12); }
.quest-progress i { display: block; width: 0; height: 100%; border-radius: inherit; background: var(--coral); transition: width .35s ease; }
.quest-card.complete { animation: quest-complete .7s ease; }
@keyframes quest-complete {
  0%, 100% { transform: translateY(0); }
  38% { transform: translateY(5px) rotate(-1deg); background: #fff1ae; }
}

.realm-card {
  position: absolute;
  z-index: 5;
  top: 18px;
  left: 50%;
  display: grid;
  grid-template-columns: 28px 1fr;
  align-items: center;
  column-gap: 8px;
  min-width: 190px;
  padding: 8px 11px;
  border: 1px solid rgba(245,117,114,.28);
  border-radius: 13px;
  background: rgba(255,250,226,.87);
  box-shadow: 0 12px 40px rgba(19,91,92,.11);
  transform: translateX(-50%);
  backdrop-filter: blur(10px);
}
.realm-crown {
  grid-row: 1 / 3;
  color: #d99b38;
  font: 24px/1 Georgia, serif;
  text-shadow: 0 2px 0 rgba(255,255,255,.75);
}
.realm-card small { display: block; color: var(--mist); font-size: 6px; font-weight: 800; letter-spacing: .17em; }
.realm-card strong { display: block; margin-top: 2px; font-size: 9px; letter-spacing: .08em; }
.realm-card em { grid-column: 2; color: var(--coral); font: italic 8px/1 Georgia, serif; }
.realm-card em b { font: 800 9px/1 system-ui, sans-serif; }

.core-wheel {
  --wheel-size: min(52vw, 500px);
  position: absolute;
  z-index: 4;
  top: 50%;
  left: 50%;
  width: var(--wheel-size);
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(13,89,97,.16);
  border-radius: 50%;
  pointer-events: none;
  opacity: .9;
  transition: opacity 1.2s ease;
}
.core-wheel::before,
.core-wheel::after { content: ""; position: absolute; inset: 25%; border: 1px solid rgba(13,89,97,.12); border-radius: 50%; }
.core-wheel::after { inset: -3px; border-color: transparent; border-top-color: rgba(255,243,164,.72); animation: drift-ring 18s linear infinite; }
.wheel-key {
  position: absolute;
  display: grid;
  grid-template-columns: 22px auto;
  align-items: center;
  gap: 5px;
  color: rgba(13,75,81,.76);
  font: 700 15px/1 Georgia, serif;
}
.wheel-key::before { content: ""; position: absolute; inset: -7px; border: 1px solid rgba(13,89,97,.18); border-radius: 99px; background: rgba(255,250,226,.22); }
.wheel-key small { font: 600 7px/1 system-ui, sans-serif; letter-spacing: .11em; text-transform: uppercase; }
.wk-a { top: -10px; left: 50%; transform: translateX(-50%); }
.wk-f { top: 24%; right: -34px; }
.wk-e { bottom: 23%; right: -28px; }
.wk-p { bottom: -10px; left: 50%; transform: translateX(-50%); }
.wk-h { bottom: 23%; left: -28px; }
.wk-c { top: 24%; left: -31px; }
.core-wheel.away { opacity: .13; }
.core-wheel.pulse .wheel-key { color: var(--coral); }

@keyframes drift-ring { to { transform: rotate(360deg); } }

.message {
  position: absolute;
  z-index: 7;
  left: 50%;
  top: 17%;
  padding: 7px 13px;
  border: 1px solid rgba(13,89,97,.16);
  border-radius: 99px;
  background: var(--paper);
  color: var(--foam);
  font: italic 13px/1.2 Georgia, serif;
  transform: translate(-50%, -12px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease;
}
.message.show { opacity: 1; transform: translate(-50%, 0); }

.cave-banner {
  position: absolute;
  z-index: 7;
  left: 50%;
  bottom: 52px;
  display: grid;
  min-width: 270px;
  padding: 10px 16px;
  border: 1px solid rgba(255,244,161,.68);
  border-radius: 13px;
  background: rgba(255,250,226,.91);
  box-shadow: 0 12px 35px rgba(15,78,85,.2);
  color: var(--foam);
  text-align: center;
  transform: translateX(-50%);
  backdrop-filter: blur(10px);
  transition: opacity .25s ease, visibility .25s ease, transform .25s ease;
}
.cave-banner.hidden { opacity: 0; visibility: hidden; transform: translate(-50%, 8px); }
.cave-banner > span { color: var(--coral); font-size: 7px; font-weight: 800; letter-spacing: .18em; }
.cave-banner > strong { margin: 2px 0 4px; font: 400 18px/1 Georgia, serif; }
.cave-banner > small { color: var(--mist); font: italic 9px/1.2 Georgia, serif; }
.cave-banner kbd { padding: 1px 4px; border: 1px solid var(--line); border-radius: 3px; color: var(--coral); font: 800 8px system-ui; }

.quick-controls {
  position: absolute;
  z-index: 6;
  right: 18px;
  bottom: 16px;
  left: 18px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: end;
  pointer-events: none;
}
.quick-controls button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: max-content;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 99px;
  background: var(--paper);
  font-size: 10px;
  cursor: pointer;
  pointer-events: auto;
  backdrop-filter: blur(9px);
}
.quick-controls button:hover { border-color: rgba(245,117,114,.58); }
.quick-controls button:last-child { justify-self: end; }
.quick-controls kbd, .starter-keys kbd {
  padding: 3px 5px;
  border: 1px solid rgba(13,89,97,.26);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: rgba(255,255,255,.38);
  color: var(--abyss);
  font: 700 10px/1 system-ui, sans-serif;
}
.move-note { color: rgba(13,75,81,.66); font-size: 9px; letter-spacing: .04em; }
.move-note kbd { margin: 0 1px; color: var(--foam); }
.sound-icon { color: var(--sky); font-size: 14px; }

.intro, .game-over {
  position: absolute;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(44, 183, 187, .30);
  backdrop-filter: blur(12px);
  transition: opacity .45s ease, visibility .45s ease;
}
.intro.hidden, .game-over.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.intro-card, .game-over-card {
  position: relative;
  width: min(560px, 100%);
  padding: clamp(28px, 5vw, 52px);
  border: 1px solid rgba(13,89,97,.22);
  background:
    radial-gradient(circle at 85% 10%, rgba(255,226,104,.28), transparent 34%),
    #fff7d9;
  box-shadow: 0 28px 90px rgba(14,93,95,.28);
}
.intro-card::after { content: "K"; position: absolute; right: 32px; top: 24px; color: rgba(22,141,169,.09); font: 160px/.7 Georgia, serif; pointer-events: none; }
.eyebrow { color: var(--coral); font-size: 9px; font-weight: 700; letter-spacing: .2em; }
.intro h1 { position: relative; margin: 13px 0 16px; font: 400 clamp(38px, 7vw, 68px)/.91 Georgia, serif; letter-spacing: -.045em; }
.intro p, .game-over p { position: relative; width: min(420px, 100%); margin: 0; color: var(--mist); font: italic 15px/1.55 Georgia, serif; }
.starter-keys { position: relative; display: flex; flex-wrap: wrap; gap: 9px 15px; margin: 24px 0; color: var(--foam); font-size: 10px; text-transform: uppercase; letter-spacing: .07em; }
.starter-keys span { display: flex; align-items: center; gap: 5px; }
.dive-button {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 14px 17px;
  border: 0;
  background: var(--coral);
  color: #fffdf1;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .06em;
  cursor: pointer;
}
.dive-button:hover { background: #ff8b80; }
.dive-button span { font-size: 20px; }
.intro-foot { display: block; margin-top: 14px; color: rgba(168,198,191,.65); text-align: center; font: italic 10px Georgia, serif; }

.key-map {
  position: absolute;
  z-index: 25;
  top: 0;
  right: 0;
  width: min(430px, 100%);
  height: 100%;
  padding: 28px;
  border-left: 1px solid rgba(13,89,97,.22);
  background: rgba(255, 249, 224, .98);
  box-shadow: -28px 0 80px rgba(14,93,95,.22);
  transform: translateX(105%);
  transition: transform .35s cubic-bezier(.2,.8,.2,1);
  overflow-y: auto;
}
.key-map.open { transform: translateX(0); }
.map-heading { display: flex; justify-content: space-between; align-items: start; }
.map-heading small { color: var(--coral); font-size: 8px; font-weight: 700; letter-spacing: .18em; }
.map-heading h2 { margin: 3px 0 0; font: 400 30px/1 Georgia, serif; }
.map-heading button { width: 34px; aspect-ratio: 1; border: 1px solid var(--line); border-radius: 50%; background: transparent; color: var(--mist); font-size: 22px; cursor: pointer; }
.key-map > p { color: var(--mist); font: italic 13px/1.45 Georgia, serif; }
.key-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 7px; margin-top: 20px; }
.ability-key {
  position: relative;
  display: grid;
  grid-template-columns: 31px 1fr;
  gap: 9px;
  align-items: center;
  min-height: 49px;
  padding: 7px 9px;
  border: 1px solid rgba(13,89,97,.14);
  background: rgba(255,255,255,.42);
  text-align: left;
  cursor: pointer;
  overflow: hidden;
}
.ability-key:hover { border-color: rgba(13,89,97,.42); background: rgba(255,255,255,.72); }
.ability-key.used { border-color: rgba(245,117,114,.34); }
.ability-key:not(.used)::after { content: "UNDISCOVERED"; position: absolute; right: 6px; bottom: 3px; color: rgba(168,198,191,.28); font-size: 5px; letter-spacing: .1em; }
.ability-key.cooling::before { content: ""; position: absolute; inset: 0; background: rgba(116,217,242,.13); transform-origin: left; animation: cool-sweep var(--cool-time) linear; }
.key-map.open .ability-key.cooling::before { animation-play-state: paused; }
@keyframes cool-sweep { from { transform: scaleX(1); } to { transform: scaleX(0); } }
.ability-letter { position: relative; display: grid; place-items: center; width: 31px; aspect-ratio: 1; border-radius: 50%; background: rgba(245,117,114,.11); color: var(--coral); font: 700 15px Georgia, serif; }
.ability-key strong { position: relative; display: block; color: var(--foam); font-size: 9px; letter-spacing: .07em; }
.ability-key small { position: relative; display: block; margin-top: 2px; color: var(--mist); font: italic 8px/1.1 Georgia, serif; }
.map-foot { display: flex; justify-content: space-between; gap: 16px; margin-top: 20px; padding-top: 13px; border-top: 1px solid var(--line); color: var(--mist); font-size: 8px; letter-spacing: .08em; text-transform: uppercase; }

.game-over { z-index: 28; }
.game-over-card { width: min(440px, 100%); }
.game-over h2 { margin: 11px 0 14px; font: 400 42px/.98 Georgia, serif; }
.game-over p { margin-bottom: 25px; }

@media (max-width: 760px) {
  .game-shell { grid-template-rows: 58px 1fr; min-height: 480px; }
  .topbar { grid-template-columns: 1fr 150px; gap: 10px; padding: 0 13px; }
  .brand small, .scoreboard span:nth-child(2), .scoreboard span:last-child, .meter-label, .meter-group b { display: none; }
  .meters { gap: 6px; }
  .meter-group { grid-template-columns: 1fr; }
  .scoreboard { position: absolute; right: 13px; bottom: -27px; z-index: 3; }
  .scoreboard { gap: 10px; font-size: 8px; }
  .current-card { top: 12px; left: 12px; transform: scale(.88); transform-origin: top left; }
  .quest-card { top: 12px; right: 10px; width: 178px; padding: 8px 9px; }
  .quest-compass { width: 29px; font-size: 15px; }
  .quest-copy > strong { font-size: 9px; }
  .quest-copy > em { font-size: 7px; }
  .realm-card { display: none; }
  .core-wheel { --wheel-size: min(78vw, 390px); }
  .wheel-key small { display: none; }
  .wk-f, .wk-e { right: -10px; }
  .wk-h, .wk-c { left: -10px; }
  .quick-controls { right: 11px; bottom: 10px; left: 11px; grid-template-columns: 1fr 1fr; }
  .move-note { display: none; }
  .quick-controls button:last-child { justify-self: end; }
  .cave-banner { bottom: 49px; min-width: min(270px, calc(100% - 28px)); }
  .intro { padding: 14px; }
  .intro-card { padding: 28px 23px; }
  .intro-card::after { right: 15px; top: 20px; font-size: 110px; }
  .intro h1 { font-size: clamp(38px, 13vw, 58px); }
  .key-map { padding: 22px 18px; }
}

@media (min-width: 761px) and (max-width: 1060px) {
  .realm-card { display: none; }
}

@media (max-height: 650px) {
  .intro-card { padding-top: 26px; padding-bottom: 22px; }
  .intro h1 { font-size: 45px; margin: 8px 0 10px; }
  .starter-keys { margin: 13px 0; }
  .intro-foot { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}