:root {
  color-scheme: dark;
  --bg: #050a0f;
  --surface: #0a141e;
  --surface-strong: #0e1c28;
  --line: rgba(151, 184, 201, 0.18);
  --text: #eff8fb;
  --muted: #8fa7b4;
  --accent: #57e3c0;
  --accent-strong: #20ba98;
  --danger: #ff667d;
  --safe: #65e7b5;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.55);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
}

body {
  margin: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% -20%, rgba(50, 143, 139, 0.16), transparent 40%),
    linear-gradient(180deg, #071019 0%, var(--bg) 62%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
kbd {
  font: inherit;
}

button {
  color: inherit;
}

.game-app {
  width: min(1180px, 100%);
  height: 100vh;
  height: 100dvh;
  margin: 0 auto;
  padding: 12px clamp(14px, 3vw, 34px);
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow: hidden;
}

.game-header {
  min-height: 50px;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand__mark {
  width: 34px;
  height: 34px;
  border: 2px solid var(--accent);
  border-radius: 9px 9px 3px 9px;
  background: linear-gradient(135deg, rgba(87, 227, 192, 0.2), transparent 60%);
  box-shadow: 0 0 22px rgba(87, 227, 192, 0.2), inset 0 0 12px rgba(87, 227, 192, 0.12);
  transform: rotate(45deg) scale(0.72);
}

.brand__eyebrow,
.screen__eyebrow {
  margin: 0 0 2px;
  color: var(--accent);
  font-size: 0.69rem;
  font-weight: 800;
  letter-spacing: 0.17em;
  text-transform: uppercase;
}

.brand__title {
  margin: 0;
  font-size: clamp(1rem, 2.4vw, 1.34rem);
  line-height: 1.15;
}

.status-bar {
  display: flex;
  align-items: stretch;
  gap: 8px;
}

.status-item,
.icon-button {
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(10, 20, 30, 0.8);
  backdrop-filter: blur(12px);
}

.status-item {
  padding: 7px 12px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
}

.status-item__label {
  color: var(--muted);
  font-size: 0.67rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.status-item__value {
  font-size: 0.96rem;
}

.lives {
  display: flex;
  gap: 4px;
  line-height: 1;
}

.heart {
  color: var(--danger);
  filter: drop-shadow(0 0 5px rgba(255, 102, 125, 0.42));
}

.heart--lost {
  color: #3a4650;
  filter: none;
}

.icon-button {
  width: 46px;
  padding: 0;
  cursor: pointer;
  font-weight: 900;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.icon-button:hover {
  border-color: rgba(87, 227, 192, 0.6);
  background: rgba(20, 43, 53, 0.92);
}

.icon-button:active,
.primary-button:active {
  transform: translateY(1px);
}

.game-shell {
  min-height: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow: hidden;
}

.game-stage {
  position: relative;
  min-width: 0;
  min-height: 0;
  flex: 1;
  overflow: hidden;
  border: 1px solid rgba(151, 184, 201, 0.2);
  border-radius: var(--radius);
  background-color: #03070b;
  background-image:
    linear-gradient(rgba(116, 169, 180, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(116, 169, 180, 0.035) 1px, transparent 1px);
  background-size: 32px 32px;
  box-shadow: var(--shadow), inset 0 0 80px rgba(0, 0, 0, 0.75);
  isolation: isolate;
}

.game-stage::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background: radial-gradient(circle at center, transparent 38%, rgba(0, 0, 0, 0.48) 100%);
}

#game-canvas {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 0;
  touch-action: none;
  image-rendering: pixelated;
}

.screen {
  position: absolute;
  inset: 0;
  z-index: 10;
  padding: 20px;
  display: none;
  place-items: center;
  background: rgba(2, 7, 11, 0.76);
  backdrop-filter: blur(7px);
  overflow-y: auto;
}

.screen--visible {
  display: grid;
}

.screen__panel {
  width: min(390px, 100%);
  padding: clamp(24px, 5vw, 38px);
  border: 1px solid rgba(151, 184, 201, 0.2);
  border-radius: 18px;
  background: linear-gradient(145deg, rgba(14, 28, 40, 0.96), rgba(7, 16, 24, 0.98));
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.48);
  text-align: center;
}

.screen__panel--large {
  width: min(520px, 100%);
}

.screen h2 {
  margin: 6px 0 10px;
  font-size: clamp(1.65rem, 5vw, 2.55rem);
  letter-spacing: -0.035em;
}

.screen__description {
  margin: 0 auto 22px;
  color: var(--muted);
  line-height: 1.55;
}

.result-score {
  margin: -10px 0 22px;
  color: var(--accent);
  font-size: 1.2rem;
  font-weight: 850;
}

.score-form label {
  display: block;
  margin-bottom: 7px;
  color: #c7d6dc;
  font-size: .82rem;
  font-weight: 750;
  text-align: left;
}

.score-form input {
  width: 100%;
  min-height: 46px;
  padding: 10px 13px;
  border: 1px solid rgba(151, 184, 201, .32);
  border-radius: 10px;
  outline: 0;
  background: #071019;
  color: var(--text);
  font: inherit;
}

.score-form input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(87, 227, 192, .12);
}

.form-error {
  min-height: 20px;
  margin: 7px 0 5px;
  color: var(--danger);
  font-size: .78rem;
  text-align: left;
}

.button-row {
  display: flex;
  justify-content: center;
  gap: 10px;
}

.secondary-button {
  min-height: 44px;
  padding: 10px 20px;
  border: 1px solid rgba(151, 184, 201, .3);
  border-radius: 11px;
  background: rgba(10, 20, 30, .85);
  color: #d8e5e9;
  cursor: pointer;
  font-weight: 750;
}

.leaderboard-panel {
  width: min(720px, 100%);
}

.leaderboard-content {
  margin: 18px 0 22px;
  overflow-x: auto;
}

.leaderboard-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .82rem;
  text-align: left;
}

.leaderboard-table th,
.leaderboard-table td {
  padding: 9px 8px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

.leaderboard-table th {
  color: var(--muted);
  font-size: .68rem;
  letter-spacing: .05em;
  text-transform: uppercase;
}

.leaderboard-table td:first-child {
  color: var(--accent);
  font-weight: 850;
}

.leaderboard-empty,
.leaderboard-error {
  padding: 18px;
  color: var(--muted);
}

.leaderboard-error { color: var(--danger); }

.rules {
  margin: 20px 0 26px;
  padding: 0;
  display: grid;
  gap: 10px;
  list-style: none;
  text-align: left;
}

.rules li {
  min-height: 40px;
  display: grid;
  grid-template-columns: 26px 1fr;
  align-items: center;
  gap: 11px;
  color: #c7d6dc;
  font-size: 0.9rem;
  line-height: 1.35;
}

.rule-icon {
  width: 21px;
  height: 21px;
  display: block;
  border-radius: 7px;
}

.rule-icon--player {
  border: 2px solid #f8fbfc;
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.28);
}

.rule-icon--safe {
  border: 2px solid var(--safe);
  box-shadow: 0 0 12px rgba(101, 231, 181, 0.35), inset 0 0 8px rgba(101, 231, 181, 0.25);
}

.rule-icon--monster {
  background: var(--danger);
  border-radius: 50% 50% 40% 40%;
  box-shadow: 0 0 12px rgba(255, 102, 125, 0.4);
}

.primary-button {
  min-width: 154px;
  min-height: 46px;
  padding: 11px 24px;
  border: 0;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #032019;
  cursor: pointer;
  font-weight: 850;
  box-shadow: 0 10px 28px rgba(32, 186, 152, 0.22);
  transition: filter 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

.primary-button:hover {
  filter: brightness(1.08);
  box-shadow: 0 12px 34px rgba(32, 186, 152, 0.32);
}

.loader {
  width: 34px;
  height: 34px;
  margin: 0 auto 15px;
  border: 3px solid rgba(87, 227, 192, 0.18);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 700ms linear infinite;
}

.game-footer {
  flex: 0 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: 0.76rem;
}

.game-footer p {
  margin: 0;
}

.leaderboard-link {
  padding: 0;
  border: 0;
  background: none;
  color: var(--accent);
  cursor: pointer;
  font-size: inherit;
  font-weight: 750;
}

kbd {
  min-width: 20px;
  margin-right: 2px;
  padding: 2px 5px;
  display: inline-block;
  border: 1px solid rgba(151, 184, 201, 0.28);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: var(--surface-strong);
  color: #d8e5e9;
  font-size: 0.68rem;
  font-weight: 700;
  text-align: center;
}

noscript {
  position: fixed;
  inset: auto 12px 12px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--danger);
  color: #190208;
  font-weight: 800;
  text-align: center;
}

button:focus-visible {
  outline: 3px solid rgba(87, 227, 192, 0.36);
  outline-offset: 3px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@media (max-width: 720px) {
  .game-app {
    padding: 10px;
    gap: 10px;
  }

  .game-header {
    min-height: 50px;
  }

  .brand__title {
    display: none;
  }

  .brand__mark {
    width: 28px;
    height: 28px;
  }

  .status-item {
    min-height: 42px;
    padding: 6px 9px;
  }

  .status-item--optional {
    display: none;
  }

  .icon-button {
    width: 42px;
    min-height: 42px;
  }

  .game-stage {
    min-height: 0;
    border-radius: 13px;
  }

  .game-footer {
    display: none;
  }

  .screen {
    padding: 12px;
  }

  .screen__panel {
    padding: 24px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}