:root {
  color-scheme: dark;
  --purple-950: #13051f;
  --purple-900: #22083a;
  --purple-800: #391064;
  --purple-600: #7c2ee8;
  --purple-400: #c084fc;
  --pink: #ff7ccf;
  --mint: #7ef5ad;
  --cyan: #79dcff;
  --white: #fff7ff;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--white);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  background:
    radial-gradient(circle at 20% 15%, rgba(255, 124, 207, 0.38), transparent 32rem),
    radial-gradient(circle at 80% 10%, rgba(126, 245, 173, 0.2), transparent 26rem),
    linear-gradient(135deg, var(--purple-950), var(--purple-900) 55%, #431071);
}

button {
  font: inherit;
}

.shell {
  display: grid;
  grid-template-columns: minmax(18rem, 28rem) minmax(20rem, 30rem);
  gap: clamp(1.5rem, 5vw, 4rem);
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: clamp(1rem, 4vw, 3rem);
}

.hero {
  text-shadow: 0 0 1.6rem rgba(192, 132, 252, 0.45);
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--mint);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

h1 {
  max-width: 8ch;
  margin: 0;
  font-size: clamp(4rem, 12vw, 7.6rem);
  line-height: 0.84;
  letter-spacing: -0.08em;
}

.tagline {
  max-width: 34rem;
  margin: 1.5rem 0 0;
  color: #ead7ff;
  font-size: clamp(1rem, 2vw, 1.25rem);
  line-height: 1.55;
}

.promo {
  max-width: 40rem;
  margin: clamp(2rem, 10vh, 7rem) 0 0;
  padding: 1rem 1.1rem;
  border: 1px solid rgba(126, 245, 173, 0.32);
  border-radius: 1.2rem;
  color: var(--mint);
  font-size: clamp(0.78rem, 1.7vw, 0.98rem);
  font-weight: 900;
  letter-spacing: 0.09em;
  line-height: 1.55;
  text-transform: uppercase;
  overflow-wrap: anywhere;
  background: rgba(19, 5, 31, 0.44);
  box-shadow:
    0 1rem 3rem rgba(0, 0, 0, 0.24),
    inset 0 0 2rem rgba(126, 245, 173, 0.08);
}

.promo span {
  display: block;
  margin-top: 0.35rem;
  color: #fff7ff;
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: 0.9em;
  letter-spacing: 0.02em;
  text-transform: none;
}

.promo a {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-thickness: 0.12em;
  text-underline-offset: 0.2em;
}

.promo a:hover,
.promo a:focus-visible {
  color: var(--white);
}

.game-card {
  width: min(100%, 30rem);
  padding: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 2rem;
  background: rgba(35, 8, 58, 0.72);
  box-shadow:
    0 2rem 5rem rgba(0, 0, 0, 0.35),
    inset 0 0 4rem rgba(192, 132, 252, 0.14);
  backdrop-filter: blur(18px);
}

.hud {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.55rem;
  margin-bottom: 0.8rem;
}

.hud div {
  padding: 0.7rem 0.45rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 1rem;
  text-align: center;
  background: rgba(19, 5, 31, 0.6);
}

.label {
  display: block;
  color: #cdb0ff;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hud strong {
  display: block;
  margin-top: 0.16rem;
  font-size: 1.35rem;
}

.canvas-wrap {
  position: relative;
  overflow: hidden;
  border: 0.25rem solid rgba(255, 255, 255, 0.18);
  border-radius: 1.5rem;
  background: #24083d;
  box-shadow: inset 0 0 3rem rgba(0, 0, 0, 0.32);
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: linear-gradient(180deg, rgba(19, 5, 31, 0.5), rgba(19, 5, 31, 0.88));
}

.overlay.hidden {
  display: none;
}

.overlay-panel {
  width: min(100%, 22rem);
  padding: 1.4rem;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 1.4rem;
  text-align: center;
  background: rgba(44, 10, 76, 0.9);
  box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, 0.42);
}

.overlay-panel h2 {
  margin: 0;
  color: var(--pink);
  font-size: clamp(2rem, 8vw, 3.25rem);
  line-height: 0.95;
}

.overlay-panel p {
  margin: 0.85rem 0 1.2rem;
  color: #f0dcff;
  line-height: 1.5;
}

#start-button {
  width: 100%;
  padding: 0.9rem 1.1rem;
  border: 0;
  border-radius: 999px;
  color: #210838;
  font-weight: 900;
  cursor: pointer;
  background: linear-gradient(135deg, var(--mint), var(--cyan));
  box-shadow: 0 0.85rem 2rem rgba(126, 245, 173, 0.28);
}

#save-score-button,
#refresh-scores {
  border: 0;
  color: #210838;
  font-weight: 900;
  cursor: pointer;
  background: linear-gradient(135deg, var(--pink), var(--purple-400));
}

.score-form {
  margin: 0 0 1rem;
}

.score-form.hidden {
  display: none;
}

.score-form label {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--mint);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.score-entry {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
}

.score-entry input {
  min-width: 0;
  padding: 0.74rem 0.8rem;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  color: var(--white);
  background: rgba(19, 5, 31, 0.76);
  outline: none;
}

.score-entry input:focus {
  border-color: var(--mint);
  box-shadow: 0 0 0 0.2rem rgba(126, 245, 173, 0.16);
}

.score-entry button {
  padding: 0.74rem 0.95rem;
  border-radius: 999px;
}

.score-status {
  min-height: 1.2rem;
  margin: 0.45rem 0 0;
  color: #d9c2ff;
  font-size: 0.8rem;
}

.leaderboard {
  margin-top: 0.9rem;
  padding: 0.85rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 1.2rem;
  background: rgba(19, 5, 31, 0.52);
}

.leaderboard-header {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.55rem;
}

.leaderboard h2 {
  margin: 0;
  color: var(--pink);
  font-size: 1rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

#refresh-scores {
  padding: 0.42rem 0.7rem;
  border-radius: 999px;
  font-size: 0.78rem;
}

#high-scores {
  display: grid;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

#high-scores li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.55rem;
  align-items: center;
  padding: 0.58rem 0.65rem;
  border-radius: 0.85rem;
  color: #f6eaff;
  background: rgba(255, 255, 255, 0.08);
}

.rank {
  color: var(--mint);
  font-weight: 900;
}

.score-name {
  overflow: hidden;
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.score-meta {
  color: #cdb0ff;
  font-size: 0.78rem;
}

.score-value {
  color: var(--cyan);
  font-weight: 900;
}

.controls {
  margin: 0.85rem 0 0;
  color: #d9c2ff;
  font-size: 0.9rem;
  line-height: 1.45;
  text-align: center;
}

kbd {
  padding: 0.12rem 0.36rem;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 0.35rem;
  background: rgba(255, 255, 255, 0.12);
}

@media (max-width: 860px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .hero {
    text-align: center;
  }

  h1,
  .tagline,
  .promo {
    margin-right: auto;
    margin-left: auto;
  }

  .promo {
    margin-top: 1.4rem;
  }

  .game-card {
    margin: 0 auto;
  }
}