/* Shared base + hub styles. */

:root {
  --bg: #0b1026;
  --bg-2: #141b3d;
  --fg: #ffffff;
  --accent: #ffd600;
  --pink: #ff77c6;
  --cyan: #4fe3ff;
  --wall: #7ec8ff;
  --dot: #ffe082;
  --safe-top: env(safe-area-inset-top, 0);
  --safe-bottom: env(safe-area-inset-bottom, 0);
}

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

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui,
    Roboto, "Helvetica Neue", Arial, sans-serif;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
  overscroll-behavior: none;
}

body {
  padding-top: var(--safe-top);
  padding-bottom: var(--safe-bottom);
}

/* -------- Hub -------- */

.hub {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  text-align: center;
}

.hub__title {
  font-size: clamp(2.25rem, 8vw, 3.5rem);
  margin: 0.5rem 0 0.25rem;
  letter-spacing: 0.02em;
  color: var(--accent);
  text-shadow: 0 4px 0 rgba(0, 0, 0, 0.2);
}

.hub__subtitle {
  margin: 0 0 2rem;
  opacity: 0.75;
  font-size: 1.05rem;
}

.tiles {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
}

.tile {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 1.25rem 1rem;
  background: var(--bg-2);
  border-radius: 1.25rem;
  text-decoration: none;
  color: var(--fg);
  font-weight: 700;
  font-size: 1.25rem;
  aspect-ratio: 1 / 1;
  box-shadow: 0 6px 0 rgba(0, 0, 0, 0.25), 0 0 0 2px rgba(255, 255, 255, 0.05)
    inset;
  transition: transform 0.08s ease;
}

.tile:active {
  transform: translateY(2px);
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.25),
    0 0 0 2px rgba(255, 255, 255, 0.05) inset;
}

.tile__art {
  width: 60%;
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tile__label {
  font-size: 1.1rem;
}

/* Little Pac-Man face made with a single div. */
.pac {
  --size: 100%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 30% 30%, #fff176, var(--accent) 60%);
  border-radius: 50%;
  position: relative;
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.3);
}
.pac::before {
  /* mouth wedge */
  content: "";
  position: absolute;
  top: 50%;
  right: -1px;
  width: 55%;
  height: 55%;
  background: var(--bg-2);
  transform: translateY(-50%);
  clip-path: polygon(0 50%, 100% 0, 100% 100%);
}
.pac::after {
  /* eye */
  content: "";
  position: absolute;
  top: 18%;
  left: 48%;
  width: 12%;
  height: 12%;
  background: #111;
  border-radius: 50%;
}

/* Piano Tiles icon — four coloured key bars. */
.tile__art--piano {
  align-items: flex-end;
}

.piano-keys {
  display: flex;
  align-items: flex-end;
  gap: 5px;
  width: 90%;
  height: 90%;
}

.piano-key {
  flex: 1;
  border-radius: 6px 6px 10px 10px;
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.25);
}

.piano-key:nth-child(1) { height: 75%; }
.piano-key:nth-child(2) { height: 100%; }
.piano-key:nth-child(3) { height: 85%; }
.piano-key:nth-child(4) { height: 60%; }