/* Prepared for OpenAI Build Week, July 2026. */
:root {
  color-scheme: dark;
  --bg: #050611;
  --line: rgba(255, 255, 255, .18);
  --text: #f8fbff;
  --muted: #aeb7d6;
  --cyan: #62e9ff;
  --pink: #ff4fd8;
  --gold: #ffd15c;
  --violet: #a88bff;
  --danger: #ff7373;
  --radius: 26px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 10%, rgba(98, 233, 255, .16), transparent 30rem),
    radial-gradient(circle at 84% 18%, rgba(255, 79, 216, .14), transparent 26rem),
    linear-gradient(180deg, #050611, #080a18 48%, #050611);
  overflow-x: hidden;
}

.shell {
  width: min(1240px, calc(100% - 2rem));
  margin: auto;
  padding: 2rem 0 4rem;
}

.hero,
.game-wrap,
.panel,
.lore article,
.how-play {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(255, 255, 255, .1), rgba(255, 255, 255, .045));
  box-shadow: 0 28px 90px rgba(0, 0, 0, .42);
  backdrop-filter: blur(18px);
}

.hero {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  align-items: end;
  padding: clamp(1.1rem, 3vw, 2rem);
  margin-bottom: 1rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -40%;
  background:
    linear-gradient(115deg, transparent 0 42%, rgba(98, 233, 255, .12) 46%, transparent 50% 100%),
    repeating-linear-gradient(0deg, transparent 0 10px, rgba(255, 255, 255, .035) 11px 12px);
  animation: scan 8s linear infinite;
}

.hero > * {
  position: relative;
}

.eyebrow {
  margin: 0 0 .55rem;
  color: var(--cyan);
  letter-spacing: .14em;
  text-transform: uppercase;
  font-size: .75rem;
  font-weight: 950;
}

h1 {
  margin: 0;
  font-size: clamp(3rem, 8vw, 7.4rem);
  line-height: .82;
  letter-spacing: 0;
  text-transform: uppercase;
  text-shadow:
    4px 4px 0 rgba(255, 79, 216, .5),
    -3px -3px 0 rgba(98, 233, 255, .45),
    0 0 48px rgba(98, 233, 255, .28);
}

.lede {
  max-width: 820px;
  margin: 1.1rem 0 0;
  color: var(--muted);
  line-height: 1.7;
  font-size: clamp(1rem, 1.5vw, 1.18rem);
}

.stats {
  display: grid;
  gap: .65rem;
  min-width: 210px;
}

.stats div,
.hud div {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(0, 0, 0, .22);
  padding: .8rem .9rem;
}

.stats span,
.hud span {
  display: block;
  color: var(--muted);
  font-size: .74rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  font-weight: 850;
}

.stats strong,
.hud strong {
  display: block;
  margin-top: .22rem;
  font-variant-numeric: tabular-nums;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 1rem;
  align-items: start;
}

.game-wrap {
  position: relative;
  overflow: hidden;
  min-height: 400px;
  background: radial-gradient(circle at center, rgba(98, 233, 255, .08), transparent 38rem), rgba(255, 255, 255, .055);
  touch-action: none;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  background: #03040d;
  image-rendering: pixelated;
}

.hud {
  position: absolute;
  left: 1rem;
  right: 1rem;
  top: 1rem;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .6rem;
  pointer-events: none;
}

.hud div {
  padding: .62rem .75rem;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 1rem;
  background:
    radial-gradient(circle at center, rgba(8, 10, 24, .58), rgba(3, 4, 13, .86)),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, .035) 0 1px, transparent 1px 5px);
}

.overlay.hidden {
  display: none;
}

.card {
  width: min(560px, 100%);
  border: 1px solid rgba(98, 233, 255, .35);
  border-radius: 26px;
  background: rgba(4, 7, 18, .84);
  box-shadow: 0 0 70px rgba(98, 233, 255, .2), inset 0 0 40px rgba(255, 255, 255, .045);
  padding: clamp(1.1rem, 4vw, 2rem);
  text-align: center;
}

.card h2 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: .92;
  letter-spacing: 0;
  text-transform: uppercase;
}

.card p:not(.eyebrow) {
  color: var(--muted);
  line-height: 1.7;
  margin: 1rem 0 1.25rem;
}

button {
  font: inherit;
  border: 1px solid rgba(255, 255, 255, .28);
  border-radius: 999px;
  color: #031018;
  background: linear-gradient(135deg, var(--cyan), var(--gold));
  padding: .85rem 1.15rem;
  font-weight: 950;
  box-shadow: 0 12px 40px rgba(98, 233, 255, .22);
  cursor: pointer;
  touch-action: manipulation;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 3px;
}

.panel {
  padding: 1rem;
}

.panel section {
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 20px;
  padding: 1rem;
  background: rgba(0, 0, 0, .18);
}

.panel section + section {
  margin-top: .8rem;
}

.panel h2,
.lore h2,
.how-play h2 {
  margin: 0 0 .7rem;
  font-size: 1.05rem;
}

.panel p,
.lore p,
.how-play p {
  color: var(--muted);
  line-height: 1.6;
  margin: .4rem 0;
}

.dot {
  display: inline-block;
  width: .75rem;
  height: .75rem;
  margin-right: .45rem;
  border-radius: 50%;
  vertical-align: -.06rem;
  box-shadow: 0 0 18px currentColor;
}

.gamma {
  color: var(--pink);
  background: var(--pink);
}

.entropy {
  color: var(--danger);
  background: var(--danger);
}

.gravity {
  color: var(--violet);
  background: var(--violet);
}

.phi {
  color: var(--gold);
  background: var(--gold);
}

.touch {
  display: none;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  margin: 1rem 0 0;
  padding: 0 .25rem;
  touch-action: none;
}

.dpad {
  display: grid;
  grid-template-columns: repeat(3, 3.2rem);
  grid-template-rows: repeat(3, 3.2rem);
  gap: .35rem;
}

.dpad button {
  padding: 0;
  display: grid;
  place-items: center;
}

.dpad [data-touch="up"] {
  grid-column: 2;
  grid-row: 1;
}

.dpad [data-touch="left"] {
  grid-column: 1;
  grid-row: 2;
}

.dpad [data-touch="down"] {
  grid-column: 2;
  grid-row: 3;
}

.dpad [data-touch="right"] {
  grid-column: 3;
  grid-row: 2;
}

.pulse {
  min-width: 9rem;
  align-self: stretch;
}

.lore {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.lore article {
  padding: 1.1rem;
}

.how-play {
  margin-top: 1rem;
  padding: clamp(1rem, 3vw, 1.4rem);
}

.how-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .45rem 1rem;
}

.how-grid p {
  margin: 0;
}

@keyframes scan {
  to {
    transform: translateX(18%);
  }
}

@media (max-width: 980px) {
  .hero,
  .layout,
  .lore,
  .how-grid {
    grid-template-columns: 1fr;
  }

  .stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 980px) and (hover: none), (max-width: 980px) and (pointer: coarse) {
  .shell {
    padding-bottom: 11.5rem;
  }

  .touch {
    display: flex;
    position: fixed;
    left: max(.75rem, env(safe-area-inset-left));
    right: max(.75rem, env(safe-area-inset-right));
    bottom: max(.75rem, env(safe-area-inset-bottom));
    z-index: 40;
    margin: 0;
    padding: .6rem;
    border: 1px solid rgba(255, 255, 255, .2);
    border-radius: 24px;
    background: rgba(4, 7, 18, .84);
    box-shadow: 0 18px 60px rgba(0, 0, 0, .45), inset 0 0 32px rgba(255, 255, 255, .055);
    backdrop-filter: blur(16px);
  }
}

@media (max-width: 640px) {
  .shell {
    width: min(100% - 1rem, 1240px);
    padding-top: .5rem;
  }

  .hero,
  .game-wrap,
  .panel,
  .lore article,
  .how-play {
    border-radius: 20px;
  }

  .hud {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    top: .55rem;
    left: .55rem;
    right: .55rem;
    gap: .35rem;
  }

  .hud div {
    padding: .45rem .5rem;
  }

  .hud span {
    font-size: .64rem;
  }

  .hud strong {
    font-size: .9rem;
  }

  .stats {
    grid-template-columns: 1fr;
  }

  .touch {
    gap: .65rem;
    padding: .5rem;
  }

  .dpad {
    grid-template-columns: repeat(3, 2.65rem);
    grid-template-rows: repeat(3, 2.65rem);
    gap: .25rem;
  }

  .pulse {
    min-width: 7.3rem;
    font-size: .92rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}