:root {
  color-scheme: dark;
  font-family: "Hiragino Sans", "Yu Gothic", "Helvetica Neue", sans-serif;
  color: #fff4ea;
  background: #0b1024;
  --navy: #0b1024;
  --panel: #151a36;
  --line: #3a3f68;
  --mint: #53e0b7;
  --orange: #ff9a4d;
  --pink: #ffc4d6;
  --muted: #b7b4d0;
}

* { box-sizing: border-box; }

html, body { overscroll-behavior: none; }

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 18% 8%, rgba(255, 154, 77, .22), transparent 22rem),
    radial-gradient(circle at 82% 0%, rgba(83, 224, 183, .14), transparent 24rem),
    radial-gradient(circle at 70% 90%, rgba(255, 196, 214, .1), transparent 20rem),
    var(--navy);
}

button, a { font: inherit; }
a { color: inherit; }

a:focus-visible,
button:focus-visible {
  outline: 3px solid #fff;
  outline-offset: 4px;
}

.site-header,
main {
  width: min(92vw, 1120px);
  margin-inline: auto;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 68px;
  border-bottom: 1px solid var(--line);
}

.site-header a {
  color: var(--mint);
  font-size: .9rem;
  font-weight: 800;
  text-decoration: none;
}

.site-header p {
  margin: 0;
  color: var(--muted);
  font: 700 .72rem/1 "Trebuchet MS", ui-monospace, monospace;
  letter-spacing: .08em;
}

main {
  display: grid;
  grid-template-columns: minmax(210px, .55fr) minmax(0, 1.45fr);
  gap: clamp(1.5rem, 5vw, 4rem);
  padding: clamp(2.5rem, 6vw, 5rem) 0 4rem;
}

.intro { align-self: start; position: sticky; top: 2rem; }
.eyebrow {
  margin: 0 0 .8rem;
  color: var(--mint);
  font: 800 .72rem/1 "Trebuchet MS", ui-monospace, monospace;
  letter-spacing: .14em;
}

h1 {
  margin: 0;
  font-size: clamp(3.1rem, 7.5vw, 5.6rem);
  line-height: .92;
  letter-spacing: -.04em;
}

h1 span { color: var(--orange); }
.intro > p:last-child { margin: 1.5rem 0 0; color: var(--muted); font-size: 1rem; line-height: 1.8; }

.game-panel,
.help {
  border: 1px solid var(--line);
  border-radius: 1.4rem;
  background: rgba(21, 26, 54, .92);
  box-shadow: 0 25px 70px rgba(0,0,0,.28);
}

.scoreboard {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-bottom: 1px solid var(--line);
}

.scoreboard p { margin: 0; padding: .9rem .7rem; border-right: 1px solid var(--line); }
.scoreboard p:last-child { border-right: 0; }
.scoreboard span { display: block; margin-bottom: .3rem; color: var(--muted); font-size: .68rem; font-weight: 750; }
.scoreboard strong { color: var(--pink); font-size: .95rem; }
.scoreboard b { color: #fff; font-size: 1.25rem; }

.stage-wrap {
  position: relative;
  overflow: hidden;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 840 / 500;
  background: #0b1024;
  touch-action: none;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  gap: .4rem;
  padding: 1.5rem;
  text-align: center;
  background: rgba(11, 16, 36, .42);
  pointer-events: none;
}

.overlay.is-hidden { display: none; }

.overlay-kicker {
  margin: 0;
  color: var(--mint);
  font: 800 .72rem/1 "Trebuchet MS", sans-serif;
  letter-spacing: .16em;
}

.overlay-lead {
  margin: 0;
  color: #fff;
  font-size: clamp(1.3rem, 4vw, 2rem);
  font-weight: 900;
  line-height: 1.35;
  text-shadow: 0 6px 18px rgba(0,0,0,.45);
}

.overlay-note {
  margin: .4rem 0 0;
  color: var(--pink);
  font-weight: 700;
}

.popup {
  position: absolute;
  left: 50%;
  top: 18%;
  margin: 0;
  transform: translateX(-50%);
  color: #0b1024;
  background: var(--mint);
  padding: .35rem .8rem;
  border-radius: 999px;
  font-weight: 900;
  opacity: 0;
  pointer-events: none;
}

.popup.is-on { opacity: 1; }

.status {
  min-height: 1.6em;
  margin: 1.15rem 1.2rem .8rem;
  color: #e8e4f6;
  text-align: center;
  font-weight: 700;
}

.action {
  display: block;
  width: calc(100% - 2.4rem);
  min-height: 64px;
  margin: 0 1.2rem;
  border: 0;
  border-radius: 999px;
  color: #0b1024;
  background: var(--mint);
  font-size: 1.08rem;
  font-weight: 900;
  cursor: pointer;
  touch-action: none;
  user-select: none;
  box-shadow: 0 10px 28px rgba(83, 224, 183, .22);
}

.action:hover { filter: brightness(1.06); }
.action.is-held { background: var(--orange); }
.key-hint { margin: .8rem 1.2rem 1.2rem; color: var(--muted); font-size: .78rem; text-align: center; }
kbd { padding: .15rem .4rem; border: 1px solid #52647b; border-radius: .3rem; background: #09182a; }

.help {
  grid-column: 2;
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 1.5rem;
  margin-top: 1.2rem;
  padding: 1.5rem;
}
.help h2 { margin: 0; font-size: clamp(1.35rem, 3vw, 2rem); line-height: 1.25; }
.help ol { display: grid; gap: .8rem; margin: 0; padding: 0; list-style: none; }
.help li { display: grid; grid-template-columns: 1.8rem 1fr; gap: .7rem; align-items: start; color: var(--muted); font-size: .92rem; line-height: 1.55; }
.help li span { display: grid; place-items: center; width: 1.8rem; height: 1.8rem; border-radius: 50%; color: #0b1024; background: var(--orange); font-weight: 900; }
.reset {
  justify-self: start;
  border: 0;
  padding: 0;
  color: var(--muted);
  background: transparent;
  font-size: .78rem;
  text-decoration: underline;
  cursor: pointer;
}
.save-note { align-self: end; margin: 0; color: #8b88a6; font-size: .72rem; line-height: 1.5; }

@media (max-width: 840px) {
  .scoreboard { grid-template-columns: repeat(3, 1fr); }
  .scoreboard p:nth-child(4),
  .scoreboard p:nth-child(5) { border-top: 1px solid var(--line); }
}

@media (max-width: 760px) {
  main { grid-template-columns: 1fr; padding-top: 2.5rem; }
  .intro { position: static; }
  .intro br { display: none; }
  .help { grid-column: 1; }
}

@media (max-width: 520px) {
  .site-header p { display: none; }
  .scoreboard p { padding: .7rem .5rem; }
  .scoreboard strong { font-size: .78rem; }
  .scoreboard b { font-size: 1.05rem; }
  .help { grid-template-columns: 1fr; }
  .action { min-height: 72px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

.share-x {
  display: block;
  width: calc(100% - 2.4rem);
  min-height: 48px;
  margin: .7rem 1.2rem 0;
  border: 0;
  border-radius: 999px;
  background: #24324c;
  color: #fff4ea;
  font-weight: 800;
  cursor: pointer;
}
.share-x[hidden] { display: none !important; }