:root {
  --bg-top: #070d1e;
  --bg-mid: #121a30;
  --bg-bottom: #1f2540;
  --ink: #e7edf8;
  --accent: #f4c430;
  --accent-strong: #ffdf5a;
  --panel: rgba(4, 8, 20, 0.82);
  --panel-border: rgba(244, 196, 48, 0.45);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  display: flex;
  justify-content: center;
  align-items: stretch;
  color: var(--ink);
  font-family: "Rajdhani", sans-serif;
  background:
    radial-gradient(circle at 15% 20%, rgba(244, 196, 48, 0.16), transparent 30%),
    radial-gradient(circle at 85% 15%, rgba(86, 112, 181, 0.2), transparent 40%),
    linear-gradient(180deg, var(--bg-top), var(--bg-mid) 45%, var(--bg-bottom));
  padding: clamp(0.35rem, 1.2vh, 0.75rem);
  overflow: hidden;
}

.app {
  width: min(100%, 560px);
  height: 100%;
  max-height: 100%;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: clamp(0.45rem, 1.25vh, 0.85rem);
}

.hud-top h1 {
  margin: 0;
  font-family: "Bangers", cursive;
  font-size: clamp(1.65rem, 5.6vw, 2.8rem);
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--accent);
  text-shadow: 0 2px 0 #000, 0 0 18px rgba(244, 196, 48, 0.24);
}

.hud-top p {
  margin: 0.15rem 0 0;
  font-size: clamp(0.8rem, 2.4vw, 1rem);
  opacity: 0.92;
}

kbd {
  font-family: inherit;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 0.05rem 0.45rem;
  background: rgba(0, 0, 0, 0.3);
}

.game-shell {
  position: relative;
  width: 100%;
  height: auto;
  max-height: 100%;
  min-height: 0;
  aspect-ratio: 21 / 34;
  margin-inline: auto;
  border-radius: 18px;
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.18);
  box-shadow:
    0 16px 45px rgba(0, 0, 0, 0.45),
    inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

#gameCanvas {
  display: block;
  width: 100%;
  height: 100%;
  background: transparent;
  touch-action: none;
}

.panel {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  gap: 0.8rem;
  padding: 2rem;
  background:
    linear-gradient(135deg, rgba(8, 14, 33, 0.9), rgba(16, 26, 48, 0.78)),
    var(--panel);
  backdrop-filter: blur(2px);
}

.panel--start {
  background:
    linear-gradient(180deg, rgba(5, 10, 24, 0.18), rgba(5, 10, 24, 0.66) 48%, rgba(5, 10, 24, 0.86)),
    url("assets/backgrounds/launch-cover.webp") center / cover;
}

.panel--gameover {
  background:
    linear-gradient(180deg, rgba(5, 10, 24, 0.2), rgba(5, 10, 24, 0.76) 42%, rgba(5, 10, 24, 0.88)),
    url("assets/backgrounds/lost-screen.webp") center / cover;
}

.panel h2 {
  margin: 0;
  font-family: "Bangers", cursive;
  color: var(--accent);
  font-size: clamp(1.8rem, 6vw, 2.4rem);
  letter-spacing: 0.06em;
  text-shadow: 0 2px 0 #000, 0 0 16px rgba(0, 0, 0, 0.72);
}

.panel p {
  margin: 0;
  font-size: 1.05rem;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.82);
}

.panel button {
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.34);
}

.panel-credit {
  position: absolute;
  left: 50%;
  bottom: clamp(1rem, 3vh, 1.6rem);
  transform: translateX(-50%);
  width: max-content;
  max-width: calc(100% - 2rem);
  color: rgba(231, 237, 248, 0.82);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-align: center;
}

button {
  justify-self: center;
  border: 1px solid var(--panel-border);
  border-bottom-width: 3px;
  border-radius: 999px;
  padding: 0.65rem 1.4rem;
  font-family: "Rajdhani", sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: #191200;
  cursor: pointer;
  background: linear-gradient(180deg, var(--accent-strong), var(--accent));
  transition: transform 140ms ease, filter 140ms ease;
}

button:hover,
button:focus-visible {
  transform: translateY(-1px);
  filter: brightness(1.06);
}

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

.hud-bottom {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.score-box {
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 12px;
  padding: clamp(0.36rem, 1vh, 0.5rem) clamp(0.6rem, 2.4vw, 0.9rem);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  background: rgba(5, 9, 22, 0.6);
}

.score-box span {
  opacity: 0.88;
}

.score-box strong {
  color: var(--accent);
  font-size: clamp(1rem, 2.8vh, 1.3rem);
  line-height: 1;
}

.hidden {
  display: none;
}

@media (max-width: 480px) {
  .panel {
    padding: 1.4rem;
  }

  .panel p {
    font-size: 0.96rem;
  }
}

@media (max-height: 760px) {
  .panel {
    gap: 0.6rem;
  }

  .panel p {
    font-size: 0.92rem;
  }

  button {
    padding: 0.5rem 1.15rem;
  }
}

@media (max-height: 680px) {
  .hud-top p {
    display: none;
  }
}