:root {
  --black: #020304;
  --white: #eefcff;
  --neon: #a855f7;
  --cyan: #3d7cff;
  --hot: #ff38d1;
  --acid: #d7ff38;
  --grid-a: #071013;
  --grid-b: #10181d;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  min-height: 100%;
  margin: 0;
  background: var(--black);
}

body {
  color: var(--white);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  overscroll-behavior: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
}

button {
  cursor: pointer;
  font: inherit;
}

.portal-app {
  position: relative;
  display: grid;
  grid-template-rows: 52px 1fr;
  min-height: 100vh;
  min-height: 100svh;
  isolation: isolate;
  overflow: hidden;
  background: radial-gradient(circle at 50% 46%, #132025 0, #06090b 39%, #020304 72%);
}

.portal-app[data-palette="cryo"] {
  --neon: #00f6ff;
  --cyan: #7effff;
  --hot: #407cff;
  --acid: #efffff;
}

.portal-app[data-palette="flare"] {
  --neon: #ff5a16;
  --cyan: #ffe600;
  --hot: #ff174f;
  --acid: #fff28a;
}

.portal-app[data-palette="radioactive"] {
  --neon: #6dff00;
  --cyan: #00ffb7;
  --hot: #d6ff00;
  --acid: #eaffbf;
}

.portal-app[data-palette="candy"] {
  --neon: #ff4fd8;
  --cyan: #65f6ff;
  --hot: #ff8a2b;
  --acid: #fff0fb;
}

.portal-app[data-palette="sunset"] {
  --neon: #ff7a18;
  --cyan: #ffd166;
  --hot: #ff2d6f;
  --acid: #fff3b0;
}

.portal-app[data-palette="deepsea"] {
  --neon: #00d4ff;
  --cyan: #3a86ff;
  --hot: #00ffb3;
  --acid: #caffbf;
}

.portal-app[data-palette="monochrome"] {
  --neon: #ffffff;
  --cyan: #a6b4c0;
  --hot: #e0e7ec;
  --acid: #ffffff;
}

.portal-app::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  opacity: 0.22;
  background-image:
    linear-gradient(rgba(0, 246, 255, 0.11) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 246, 255, 0.08) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle, #000 0, transparent 72%);
}

.portal-app::after {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
  content: "";
  opacity: 0.1;
  background: repeating-linear-gradient(0deg, transparent 0 3px, rgba(255, 255, 255, 0.16) 4px);
  mix-blend-mode: overlay;
}

.portal-header {
  position: relative;
  z-index: 1000;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(44px, 1fr);
  align-items: center;
  height: 52px;
  padding: 0 clamp(10px, 2vw, 24px);
  background: rgba(3, 4, 6, 0.86);
  border-bottom: 1px solid #222a2e;
  backdrop-filter: blur(18px);
}

.portal-brand {
  display: flex;
  gap: 9px;
  align-items: center;
  color: var(--white);
  font-size: clamp(1.35rem, 3vw, 2.15rem);
  font-weight: 950;
  line-height: 1;
  letter-spacing: -0.055em;
  text-decoration: none;
  text-shadow: 0 0 16px rgba(238, 252, 255, 0.2);
  min-width: 0;
  white-space: nowrap;
}

.portal-brand > span {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}

.portal-brand > i {
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  border: 2px solid var(--neon);
  box-shadow: 0 0 13px var(--neon), inset 0 0 7px var(--neon);
  transform: rotate(45deg);
}

.portal-brand b {
  margin-left: 0.08em;
  color: var(--neon);
  text-shadow: 0 0 11px var(--neon);
}

.warp-word { display: inline-flex; align-items: baseline; white-space: nowrap; letter-spacing: -0.075em; }
.warp-word .inverted-a { display: inline-block; width: .66em; margin: 0 -.025em 0 -.055em; letter-spacing: 0; text-align: center; transform: rotate(180deg) translateY(-.035em); transform-origin: 50% 52%; }
.warp-word .after-a { margin-left: -.025em; }

.turn-core {
  display: flex;
  gap: 10px;
  align-items: center;
  margin: 0;
  font-size: clamp(0.9rem, 2vw, 1.2rem);
  font-weight: 950;
  letter-spacing: 0.12em;
  min-width: 104px;
  justify-content: center;
  white-space: nowrap;
}

.turn-core > i,
.player-signal i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--acid);
  box-shadow: 0 0 8px var(--acid);
}

.turn-core b {
  color: var(--neon);
}

.action-button {
  width: 100%;
  height: 42px;
  padding: 0 12px;
  color: #a9b6ba;
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  background: #0b1012;
  border: 1px solid #405057;
  border-radius: 0;
}

.header-actions { display: flex; gap: 6px; justify-self: end; }

.menu-shell,
.volume-shell {
  position: relative;
  z-index: 1001;
}

.menu-button,
.volume-button {
  display: grid;
  place-content: center;
  gap: 4px;
  width: 42px;
  height: 42px;
  padding: 0;
  background: #080d0f;
  border: 1px solid #405057;
}

.volume-button span { position: relative; display: block; width: 12px; height: 14px; border: 2px solid var(--white); border-right: 0; }
.volume-button span::before { content: ""; position: absolute; left: -7px; top: 2px; width: 7px; height: 6px; background: var(--white); clip-path: polygon(0 25%,45% 25%,100% 0,100% 100%,45% 75%,0 75%); }
.volume-button span::after { content: "))"; position: absolute; left: 9px; top: -8px; color: var(--cyan); font: 900 14px/1 monospace; letter-spacing: -5px; }

.menu-button span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--white);
  box-shadow: 0 0 8px var(--cyan);
}

.game-menu {
  position: absolute;
  z-index: 1002;
  top: calc(100% + 7px);
  right: 0;
  width: min(290px, calc(100vw - 16px));
  padding: 14px;
  background: rgba(2, 5, 7, 0.97);
  border: 1px solid var(--cyan);
  box-shadow: 0 18px 55px #000, 0 0 24px color-mix(in srgb, var(--cyan), transparent 70%);
}

.game-menu[hidden] {
  display: none;
}

.sound-menu { width: min(310px, calc(100vw - 16px)); }

.game-menu strong {
  display: block;
  margin-bottom: 10px;
  color: var(--acid);
  letter-spacing: 0.14em;
}

.menu-wordmark { white-space: nowrap; }

.preset-control {
  display: grid;
  gap: 5px;
  margin-top: 8px;
  padding: 9px 10px;
  background: #0b1012;
  border: 1px solid #334047;
}

.preset-control label {
  color: #77888e;
  font-size: .62rem;
  font-weight: 900;
  letter-spacing: .13em;
}

.preset-control select {
  width: 100%;
  min-height: 32px;
  padding: 4px 30px 4px 7px;
  color: var(--white);
  font: 850 .88rem/1.2 Inter, ui-sans-serif, system-ui, sans-serif;
  background: #11191c;
  border: 1px solid #4a5b62;
  border-radius: 0;
}

.preset-control input[type="range"] { width: 100%; accent-color: var(--acid); }

.sound-profile {
  padding: 10px 11px;
  background: color-mix(in srgb, var(--acid), transparent 95%);
  border: 1px solid color-mix(in srgb, var(--acid), transparent 55%);
}

.sound-profile span,
.sound-profile b,
.sound-profile small {
  display: block;
}

.sound-profile span {
  color: #77888e;
  font-size: 0.62rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.sound-profile b {
  margin-top: 3px;
  color: var(--acid);
  font-size: 0.86rem;
  letter-spacing: 0.08em;
}

.sound-profile small {
  margin-top: 2px;
  color: #96a5a9;
  font-size: 0.66rem;
}

.sound-lab-link {
  color: var(--acid);
  border-color: color-mix(in srgb, var(--acid), transparent 42%);
}

.game-menu .set-button,
.game-menu .action-button {
  margin-top: 8px;
}

.menu-link {
  display: grid;
  place-items: center;
  min-height: 42px;
  margin-top: 8px;
  color: #a9b6ba;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-decoration: none;
  background: #0b1012;
  border: 1px solid #405057;
}

.menu-link:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

.game-menu p {
  margin: 12px 0 0;
  color: #8fa0a6;
  font-size: 0.82rem;
  line-height: 1.45;
}

.how-to-play { margin-top: 9px; padding: 10px; color: #a9b6ba; background: #0b1012; border: 1px solid #405057; }
.how-to-play summary { cursor: pointer; color: var(--cyan); font-size: .72rem; font-weight: 900; letter-spacing: .1em; }
.how-to-play p { margin-top: 9px; }

.action-button:hover {
  color: var(--neon);
  border-color: var(--neon);
  box-shadow: 0 0 10px color-mix(in srgb, var(--neon), transparent 70%);
}

.game-core {
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto auto;
  place-items: center;
  gap: 4px;
  padding: 5px 4px;
}

.player-signal {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: center;
  width: min(920px, calc(100vw - 10px));
  min-height: 38px;
  padding: 3px 10px;
  color: var(--white);
  background: rgba(3, 6, 8, 0.82);
  border: 1px solid #27343a;
  box-shadow: inset 0 0 16px rgba(0, 246, 255, 0.05);
}

.player-signal > div {
  display: flex;
  gap: 7px;
  align-items: center;
  color: #a9b6ba;
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 0.11em;
}

.player-signal b,
.player-signal span {
  justify-self: end;
  color: var(--neon);
  font-size: clamp(1.35rem, 4vw, 2.15rem);
  font-weight: 950;
  text-shadow: 0 0 11px var(--neon);
}

.player-bottom {
  grid-template-columns: auto 1fr auto;
}

.set-panel {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  width: min(920px, calc(100vw - 10px));
}

.set-panel .last-score {
  grid-column: span 2;
}

.set-panel div,
.set-button {
  min-height: 42px;
  padding: 5px 8px;
  color: var(--white);
  background: rgba(3, 6, 8, 0.82);
  border: 1px solid #27343a;
  box-shadow: inset 0 0 16px rgba(0, 246, 255, 0.05);
}

.set-button {
  width: 100%;
  color: var(--neon);
  font-size: 1rem;
  font-weight: 950;
  letter-spacing: 0.04em;
  text-align: left;
}

.set-panel span {
  display: block;
  color: #a9b6ba;
  font-size: 0.9rem;
  font-weight: 950;
  letter-spacing: 0.08em;
}
.set-panel span i{color:var(--neon);font-style:normal}

.set-panel b {
  display: block;
  margin-top: 2px;
  color: var(--neon);
  font-size: clamp(1.25rem, 3vw, 1.85rem);
  line-height: 1;
  text-shadow: 0 0 11px var(--neon);
}

.portal-frame {
  --board-size: min(calc(100svh - 218px), calc(100vw - 10px), 920px);
  position: relative;
  width: var(--board-size);
  height: var(--board-size);
  overflow: visible;
  border: 1px solid #344047;
  box-shadow: 0 0 0 1px #020303, 0 0 45px rgba(0, 246, 255, 0.08), 0 25px 70px rgba(0, 0, 0, 0.72);
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--black);
  touch-action: none;
}

.run-overlay{position:absolute;inset:0;z-index:12;display:grid;place-items:center;overflow:hidden;pointer-events:none;color:#eefcff;text-align:center;background:radial-gradient(circle,rgba(5,8,10,.2),rgba(2,3,4,.68));opacity:0}
.run-overlay[hidden]{display:none}.run-overlay.show{opacity:1;animation:overlay-arrive .42s steps(3,end) both}.run-overlay>div{position:relative;width:min(88%,610px);padding:clamp(20px,5vw,48px) 18px;border-block:2px solid currentColor;background:linear-gradient(90deg,transparent,rgba(2,4,6,.9) 12% 88%,transparent);box-shadow:0 0 42px color-mix(in srgb,currentColor,transparent 68%)}
.run-overlay small{display:block;margin-bottom:10px;color:var(--cyan,#3d7cff);font:900 clamp(10px,2vw,15px)/1 Inter,Arial,sans-serif;letter-spacing:.24em}.run-overlay strong{display:block;color:var(--acid,#d7ff38);font:950 clamp(46px,10vw,96px)/.82 Inter,Arial,sans-serif;letter-spacing:-.07em;text-shadow:3px 0 var(--hot,#ff38d1),-3px 0 var(--cyan,#3d7cff),0 0 25px currentColor}.run-overlay p{margin:16px 0 0;font:900 clamp(10px,2vw,15px)/1 Inter,Arial,sans-serif;letter-spacing:.2em}
.run-overlay.level-clear{color:var(--acid,#d7ff38)}.run-overlay.level-number,.run-overlay.level-ready{background:radial-gradient(circle,rgba(61,124,255,.2),rgba(2,3,4,.5))}.run-overlay.level-number strong,.run-overlay.level-ready strong{color:#fff}.run-overlay.victory-clear{background:transparent}.run-overlay.credits{position:fixed;z-index:80;background:#000;animation:credits-blackout 1.6s ease both}.run-overlay.credits>div{border-color:var(--hot,#ff38d1)}.run-overlay.credits strong{font-size:clamp(38px,8vw,86px);line-height:.92}.run-overlay.soft-fade{animation:overlay-soft-fade 1.4s ease forwards}
@keyframes overlay-arrive{from{opacity:0;filter:blur(8px);transform:scale(1.08)}to{opacity:1;filter:none;transform:none}}@keyframes overlay-soft-fade{to{opacity:0}}@keyframes credits-blackout{from{opacity:0}to{opacity:1}}
@media(max-width:620px){.run-overlay>div{width:94%;padding-block:24px}.run-overlay strong{font-size:clamp(38px,13vw,68px)}.run-overlay small,.run-overlay p{font-size:clamp(9px,2.8vw,13px)}.run-overlay.credits strong{font-size:clamp(34px,11vw,58px)}}

.portal-rail {
  position: absolute;
  top: 0;
  width: 9px;
  height: 100%;
  pointer-events: none;
  background:
    repeating-linear-gradient(180deg, var(--cyan) 0 12px, transparent 12px 24px),
    linear-gradient(var(--neon), var(--hot));
  box-shadow: 0 0 14px var(--cyan), 0 0 26px color-mix(in srgb, var(--hot), transparent 25%);
  animation: rail-pulse 0.72s steps(2, end) infinite;
}

.portal-rail.left {
  right: calc(100% + 5px);
}

.portal-rail.right {
  left: calc(100% + 5px);
}

.countdown {
  width: min(920px, calc(100vw - 10px));
  min-height: 34px;
  padding: 6px 10px;
  color: var(--white);
  font-size: clamp(1rem, 2.4vw, 1.35rem);
  font-weight: 950;
  letter-spacing: 0.1em;
  text-align: center;
  text-transform: uppercase;
  background: rgba(3, 6, 8, 0.82);
  border: 1px solid #344047;
  box-shadow: inset 0 0 20px rgba(0, 246, 255, 0.05);
}

@keyframes rail-pulse {
  50% {
    filter: hue-rotate(110deg) brightness(1.5);
  }
}

@media (max-width: 760px) {
  .portal-app {
    grid-template-rows: 50px 1fr;
  }

  .portal-header {
    height: 50px;
    padding-inline: 8px;
    grid-template-columns: minmax(0, 1fr) 64px 42px;
    gap: 5px;
  }

  .portal-brand {
    gap: 6px;
    font-size: clamp(.9rem, 4.8vw, 1.25rem);
  }

  .portal-brand > i { width: 9px; height: 9px; }

  .turn-core {
    min-width: 0;
    max-width: 64px;
    gap: 5px;
    justify-content: flex-start;
    overflow: hidden;
    font-size: .68rem;
    letter-spacing: .06em;
  }

  .game-core {
    justify-content: center;
    gap: 5px;
    padding: 5px 4px 7px;
  }

  .portal-frame {
    --board-size: min(calc(100vw - 8px), calc(100svh - 192px));
  }

  .player-signal {
    min-height: 40px;
    width: calc(100vw - 8px);
    padding: 4px 8px;
  }

  .set-panel {
    grid-template-columns: repeat(4, 1fr);
    gap: 5px;
    width: calc(100vw - 8px);
  }

  .set-panel div {
    min-height: 42px;
    padding: 5px 7px;
  }

  .set-panel span {
    font-size: 0.78rem;
  }

  .set-panel b {
    font-size: 1.18rem;
  }

  .countdown {
    width: calc(100vw - 8px);
    padding: 7px 8px;
    font-size: 0.9rem;
  }

  .portal-rail.left {
    right: calc(100% + 3px);
  }

  .portal-rail.right {
    left: calc(100% + 3px);
  }

}

@media (max-height: 720px) {
  .player-bottom,
  .countdown {
    display: none;
  }

  .portal-frame {
    --board-size: min(calc(100svh - 142px), calc(100vw - 8px), 920px);
  }
}

.run-overlay>div{border:1px solid var(--cyan);border-radius:28px 4px 28px 4px;background:radial-gradient(ellipse at top left,rgba(61,124,255,.28),transparent 65%),linear-gradient(135deg,rgba(10,4,30,.96),rgba(2,8,16,.94));box-shadow:0 0 0 5px rgba(61,124,255,.07),0 0 60px rgba(255,56,209,.23),inset 0 0 36px rgba(61,124,255,.12)}
.run-overlay>div::before,.run-overlay>div::after{content:"✧ ◇ ✧";display:block;color:var(--hot);letter-spacing:1em;font-size:18px;margin:0 0 18px;animation:warp-sigil 3s ease-in-out infinite alternate}
.run-overlay>div::after{margin:20px 0 0;color:var(--cyan);animation-direction:alternate-reverse}
.run-overlay.victory-clear strong{font-size:clamp(38px,9vw,82px)}
.run-overlay.victory-clear>div{border-color:var(--acid);box-shadow:0 0 80px rgba(215,255,56,.25),inset 0 0 50px rgba(255,56,209,.22)}
@keyframes warp-sigil{from{transform:translateX(-8px);opacity:.5}to{transform:translateX(8px);opacity:1}}
@media(prefers-reduced-motion:reduce){.run-overlay>div::before,.run-overlay>div::after{animation:none}}

.run-overlay[data-level="2"]{--cyan:#00f7ff;--hot:#a855f7}
.run-overlay[data-level="3"]{--cyan:#39ff14;--hot:#ff00e5}
.run-overlay[data-level="4"]{--cyan:#ff5f1f;--hot:#00f7ff}
.run-overlay[data-level="5"]{--cyan:#fff700;--hot:#ff00e5}
/* Reserve space for both mobile header controls. */
@media(max-width:760px){.portal-header{grid-template-columns:minmax(0,1fr) minmax(0,64px) auto}.turn-core b{overflow:hidden;text-overflow:ellipsis}.turn-core>i{flex-shrink:0}.header-actions{min-width:max-content}}