:root {
  --void: #03040a;
  --void-2: #070b18;
  --ink: #f6f2d8;
  --muted: #a6b1cc;
  --wall: #18a7ff;
  --wall-hot: #7ad9ff;
  --gold: #ffd54a;
  --amber: #ff8f3d;
  --green: #6cff9b;
  --rose: #ff5a91;
  --danger: #ff4d5d;
  --panel: rgba(9, 15, 33, 0.84);
  --panel-edge: rgba(122, 217, 255, 0.22);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.52);
  --font-display: "Trebuchet MS", "Gill Sans", "Avenir Next", sans-serif;
  --font-body: "Avenir Next", "Trebuchet MS", sans-serif;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(circle at 18% 10%, rgba(255, 213, 74, 0.2), transparent 22rem),
    radial-gradient(circle at 82% 16%, rgba(24, 167, 255, 0.24), transparent 24rem),
    linear-gradient(135deg, #02030a 0%, #070a14 48%, #10120f 100%);
  overflow-x: hidden;
}

body::before {
  position: fixed;
  inset: 0;
  content: "";
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.8), transparent 78%);
}

button {
  border: 0;
  border-radius: 999px;
  padding: 0.85rem 1.1rem;
  color: #08101f;
  font: 800 0.95rem/1 var(--font-body);
  letter-spacing: 0.02em;
  cursor: pointer;
  background: linear-gradient(135deg, var(--gold), #fff0a8);
  box-shadow: 0 12px 34px rgba(255, 213, 74, 0.25);
  transition: transform 160ms ease, filter 160ms ease, opacity 160ms ease;
}

button:hover {
  transform: translateY(-1px);
  filter: brightness(1.08);
}

button:active {
  transform: translateY(1px) scale(0.99);
}

button.secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: none;
}

button.danger {
  border-color: rgba(255, 77, 93, 0.4);
  color: #ffd7dc;
}

button.ghost-button {
  color: var(--muted);
  background: transparent;
  border: 1px dashed rgba(255, 255, 255, 0.18);
  box-shadow: none;
}

kbd {
  display: inline-block;
  min-width: 1.6em;
  padding: 0.1rem 0.38rem;
  border-radius: 0.35rem;
  color: #07101d;
  background: var(--gold);
  font: 800 0.75rem/1.3 ui-monospace, SFMono-Regular, Menlo, monospace;
  text-align: center;
}

.app-shell {
  width: min(1180px, calc(100vw - 28px));
  margin: 0 auto;
  padding: 28px 0 42px;
}

.hero-panel {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0 1.25rem;
  animation: rise-in 620ms ease both;
}

.eyebrow {
  margin: 0 0 0.38rem;
  color: var(--green);
  font-weight: 900;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.72rem;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0.35rem;
  font: 950 clamp(2.45rem, 5vw, 5.2rem)/0.9 var(--font-display);
  letter-spacing: -0.08em;
  text-shadow: 0 0 28px rgba(255, 213, 74, 0.24);
}

h2 {
  margin-bottom: 0.7rem;
  font: 900 1.25rem/1 var(--font-display);
  letter-spacing: -0.03em;
}

.lede {
  max-width: 680px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.6vw, 1.12rem);
}

.top-actions {
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.game-layout {
  display: grid;
  grid-template-columns: minmax(320px, 744px) minmax(280px, 380px);
  gap: clamp(1rem, 2vw, 1.35rem);
  align-items: start;
}

.cabinet {
  position: relative;
  min-height: 0;
  border: 1px solid var(--panel-edge);
  border-radius: 2rem;
  padding: clamp(0.7rem, 1.4vw, 1rem);
  background:
    linear-gradient(145deg, rgba(15, 24, 50, 0.92), rgba(5, 7, 18, 0.94)),
    radial-gradient(circle at 50% 0%, rgba(24, 167, 255, 0.2), transparent 38%);
  box-shadow: var(--shadow), inset 0 0 0 1px rgba(255, 255, 255, 0.05);
  animation: rise-in 720ms 90ms ease both;
}

#game-canvas {
  display: block;
  width: 100%;
  aspect-ratio: 28 / 31;
  border-radius: 1.35rem;
  background: #02030a;
  box-shadow: inset 0 0 60px rgba(0, 0, 0, 0.8);
}

.overlay {
  position: absolute;
  inset: 1rem;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 0.85rem;
  padding: 2rem;
  text-align: center;
  border-radius: 1.35rem;
  background: rgba(2, 3, 10, 0.78);
  backdrop-filter: blur(9px);
  transition: opacity 180ms ease, visibility 180ms ease;
}

.overlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.overlay h2 {
  margin-bottom: 0;
  font-size: clamp(2.4rem, 7vw, 4.8rem);
  color: var(--gold);
}

.overlay p {
  max-width: 34rem;
  color: var(--muted);
}

.side-panel {
  display: grid;
  gap: 1rem;
  animation: rise-in 760ms 160ms ease both;
}

.score-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.stat-card,
.brain-card,
.help-card {
  border: 1px solid var(--panel-edge);
  background: var(--panel);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.26), inset 0 0 0 1px rgba(255, 255, 255, 0.035);
  backdrop-filter: blur(15px);
}

.stat-card {
  min-height: 86px;
  padding: 0.85rem;
  border-radius: 1.15rem;
}

.stat-card span,
.sample-stats dt {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.stat-card strong {
  display: block;
  margin-top: 0.35rem;
  color: var(--ink);
  font: 950 2rem/1 var(--font-display);
}

.brain-card,
.help-card {
  border-radius: 1.35rem;
  padding: 1rem;
}

.card-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.card-heading h2 {
  margin-bottom: 0;
}

.pill {
  display: inline-grid;
  min-width: 3.8rem;
  place-items: center;
  border: 1px solid rgba(108, 255, 155, 0.3);
  border-radius: 999px;
  padding: 0.35rem 0.6rem;
  color: var(--green);
  background: rgba(108, 255, 155, 0.08);
  font-weight: 900;
}

.brain-meter {
  height: 0.7rem;
  margin: 1rem 0;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
}

.brain-meter span {
  display: block;
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--danger), var(--gold), var(--green));
  box-shadow: 0 0 22px rgba(108, 255, 155, 0.35);
  transition: width 220ms ease;
}

.sample-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 0;
}

.sample-stats div {
  padding: 0.72rem;
  border-radius: 0.95rem;
  background: rgba(255, 255, 255, 0.055);
}

.sample-stats dd {
  margin: 0.28rem 0 0;
  min-height: 1.4rem;
  color: var(--ink);
  font-weight: 900;
}

.brain-actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.65rem;
  margin-top: 1rem;
}

.help-card ol {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.help-card li + li {
  margin-top: 0.54rem;
}

@media (max-width: 900px) {
  .hero-panel {
    align-items: start;
    flex-direction: column;
  }

  .top-actions {
    justify-content: flex-start;
  }

  .game-layout {
    grid-template-columns: 1fr;
  }

  .side-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .app-shell {
    width: min(100vw - 18px, 1180px);
    padding-top: 14px;
  }

  .cabinet,
  .brain-card,
  .help-card {
    border-radius: 1.1rem;
  }

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

  button {
    width: 100%;
  }
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}