:root {
  --bg-1: #0d1612;
  --bg-2: #12251f;
  --panel: rgba(9, 20, 18, 0.82);
  --panel-border: rgba(183, 255, 133, 0.18);
  --accent: #b7ff85;
  --accent-2: #ffb84d;
  --danger: #ff6b6b;
  --text: #f4ffe9;
  --muted: #9fb49e;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(183, 255, 133, 0.14), transparent 30%),
    linear-gradient(145deg, var(--bg-1), var(--bg-2));
}

.shell {
  width: min(1440px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0;
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 20px;
}

.hud-panel,
.game-panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 28px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.hud-panel {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.brand h1,
.modal-card h2 {
  margin: 6px 0 10px;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 0.95;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.75rem;
}

.subtitle,
.summary,
.controls p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.stat-card {
  padding: 14px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.stat-card span,
.bar-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.85rem;
}

.stat-card strong {
  font-size: 1.6rem;
}

.bars {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.bar-track {
  height: 14px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.08);
}

.bar-fill {
  width: 0;
  height: 100%;
  border-radius: inherit;
  transition: width 120ms linear;
}

.xp-fill {
  background: linear-gradient(90deg, #78ff89, #d7ff74);
}

.dash-fill {
  background: linear-gradient(90deg, #ff9d42, #ffd166);
}

.controls {
  margin-top: auto;
  padding: 18px;
  border-radius: 20px;
  background: rgba(0, 0, 0, 0.15);
}

kbd {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.8rem;
}

.game-panel {
  position: relative;
  padding: 16px;
}

#gameCanvas {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 22px;
  background:
    radial-gradient(circle at top, rgba(183, 255, 133, 0.08), transparent 35%),
    linear-gradient(180deg, #1b2f28, #10221c);
}

.overlay {
  position: absolute;
  inset: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(3, 8, 7, 0.64);
  border-radius: 22px;
}

.hidden {
  display: none;
}

.modal-card {
  width: min(640px, calc(100% - 32px));
  padding: 28px;
  border-radius: 28px;
  background: rgba(16, 29, 25, 0.96);
  border: 1px solid rgba(183, 255, 133, 0.24);
  box-shadow: var(--shadow);
}

.upgrade-options {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.upgrade-card,
.action-button {
  cursor: pointer;
  border: 0;
  color: var(--text);
  transition:
    transform 140ms ease,
    box-shadow 140ms ease,
    border-color 140ms ease;
}

.upgrade-card {
  padding: 16px;
  text-align: left;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(183, 255, 133, 0.1), rgba(255, 184, 77, 0.08));
  border: 1px solid rgba(183, 255, 133, 0.18);
}

.upgrade-card:hover,
.action-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.24);
  border-color: rgba(255, 255, 255, 0.24);
}

.upgrade-card h3 {
  margin: 0 0 8px;
}

.upgrade-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.action-button {
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: 16px;
  background: linear-gradient(90deg, var(--accent), #d8ff79);
  color: #102010;
  font-weight: 700;
}

@media (max-width: 1080px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .upgrade-options {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  body {
    overflow-x: hidden;
  }

  .shell {
    width: min(100vw - 20px, 1440px);
    padding: 10px 0 20px;
    gap: 12px;
  }

  .hud-panel,
  .game-panel,
  #gameCanvas,
  .overlay {
    border-radius: 20px;
  }

  .stats {
    grid-template-columns: 1fr 1fr;
  }
}