:root {
  color-scheme: light;
  --bg-top: #061633;
  --bg-bottom: #0b6e84;
  --panel: rgba(8, 19, 43, 0.74);
  --panel-border: rgba(181, 255, 240, 0.18);
  --text: #effbfd;
  --muted: rgba(239, 251, 253, 0.76);
  --accent: #ffd166;
  --accent-strong: #ef476f;
  --accent-soft: #7ae7c7;
  --shadow: rgba(1, 9, 22, 0.32);
  --button-text: #041222;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top, rgba(255, 209, 102, 0.2), transparent 30%),
    linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
  color: var(--text);
}

body {
  min-height: 100vh;
  overscroll-behavior: none;
  touch-action: manipulation;
}

button,
kbd {
  font: inherit;
}

.shell {
  width: min(100%, 66rem);
  margin: 0 auto;
  padding: max(1rem, env(safe-area-inset-top)) 1rem max(1.5rem, env(safe-area-inset-bottom));
  display: grid;
  gap: 1rem;
}

.hero,
.game-panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 1.5rem;
  box-shadow: 0 1rem 2rem var(--shadow);
  backdrop-filter: blur(14px);
}

.hero {
  padding: 1.25rem;
  display: grid;
  gap: 1rem;
}

.eyebrow {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-soft);
}

.hero h1 {
  margin: 0.3rem 0 0.4rem;
  font-size: clamp(2.1rem, 7vw, 3.3rem);
  line-height: 0.95;
}

.lede,
.install-hint,
.controls-copy {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.hero-actions {
  display: grid;
  gap: 0.65rem;
  align-content: start;
}

.install-button,
.primary-button,
.secondary-button {
  border: 0;
  border-radius: 999px;
  padding: 0.85rem 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 140ms ease, filter 140ms ease;
}

.install-button,
.primary-button {
  background: linear-gradient(135deg, var(--accent), #ff9f1c);
  color: var(--button-text);
}

.secondary-button {
  background: rgba(239, 251, 253, 0.12);
  color: var(--text);
  border: 1px solid rgba(239, 251, 253, 0.16);
}

.install-button:active,
.primary-button:active,
.secondary-button:active {
  transform: scale(0.97);
}

.game-panel {
  padding: 1rem;
  display: grid;
  gap: 1rem;
}

.scoreboard {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr)) auto;
  gap: 0.75rem;
  align-items: center;
}

.score-chip {
  padding: 0.8rem 0.95rem;
  border-radius: 1rem;
  background: rgba(239, 251, 253, 0.08);
  border: 1px solid rgba(239, 251, 253, 0.12);
}

.score-label {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
}

.score-chip strong {
  display: block;
  font-size: 1.45rem;
  margin-top: 0.15rem;
}

.canvas-frame {
  position: relative;
  overflow: hidden;
  border-radius: 1.35rem;
  border: 1px solid rgba(239, 251, 253, 0.16);
  box-shadow: inset 0 0 0 1px rgba(1, 9, 22, 0.14);
}

#gameCanvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 16;
  background:
    linear-gradient(180deg, rgba(117, 216, 255, 0.9) 0%, rgba(28, 177, 226, 0.86) 54%, rgba(61, 190, 120, 0.78) 100%);
}

.hud {
  pointer-events: none;
  position: absolute;
  inset: 0;
  display: grid;
  align-content: start;
  justify-items: center;
  padding: 1rem;
  text-align: center;
  text-shadow: 0 2px 14px rgba(1, 9, 22, 0.26);
}

.state-title {
  margin: 0;
  padding-top: 0.2rem;
  font-size: clamp(1.4rem, 4vw, 2rem);
  font-weight: 800;
}

.state-text {
  margin: 0.45rem 0 0;
  width: min(92%, 24rem);
  color: rgba(239, 251, 253, 0.92);
  line-height: 1.4;
}

.controls {
  display: grid;
  gap: 0.75rem;
}

.install-modal[hidden] {
  display: none;
}

.install-modal {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.install-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 8, 20, 0.7);
  backdrop-filter: blur(8px);
}

.install-modal-card {
  position: relative;
  width: min(100%, 26rem);
  padding: 1.25rem;
  border-radius: 1.4rem;
  border: 1px solid rgba(239, 251, 253, 0.14);
  background:
    radial-gradient(circle at top, rgba(255, 209, 102, 0.18), transparent 34%),
    rgba(8, 19, 43, 0.94);
  box-shadow: 0 1.25rem 3rem rgba(1, 9, 22, 0.45);
}

.install-modal-eyebrow {
  margin: 0;
  color: var(--accent-soft);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.75rem;
}

.install-modal-card h2 {
  margin: 0.45rem 0 0;
  font-size: clamp(1.4rem, 5vw, 1.9rem);
  line-height: 1.02;
}

.install-modal-copy {
  margin: 0.75rem 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.install-modal-actions {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

kbd {
  display: inline-block;
  min-width: 1.6em;
  padding: 0.1rem 0.35rem;
  border-radius: 0.45rem;
  border: 1px solid rgba(239, 251, 253, 0.28);
  background: rgba(239, 251, 253, 0.12);
  color: inherit;
}

@media (min-width: 760px) {
  .shell {
    grid-template-columns: minmax(18rem, 20rem) minmax(0, 1fr);
    align-items: start;
    padding-top: 1.5rem;
  }

  .hero {
    position: sticky;
    top: 1.5rem;
  }
}

@media (max-width: 520px) {
  .scoreboard {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .secondary-button {
    grid-column: 1 / -1;
  }

  .hero,
  .game-panel {
    border-radius: 1.2rem;
  }

  .install-modal-actions {
    grid-template-columns: 1fr;
  }
}