:root {
  --bg-top: #fff7ed;
  --bg-bottom: #ecfeff;
  --ink: #172554;
  --muted: #334155;
  --surface: #fffbeb;
  --line: #cbd5e1;
  --accent: #0f766e;
  --accent-ink: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", Arial, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 15%, rgba(251, 191, 36, 0.2), transparent 32%),
    radial-gradient(circle at 88% 10%, rgba(14, 116, 144, 0.22), transparent 35%),
    linear-gradient(160deg, var(--bg-top), var(--bg-bottom));
}

.page {
  width: min(980px, 92vw);
  margin: 34px auto;
  display: grid;
  gap: 14px;
}

.panel {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 26px 24px;
  backdrop-filter: blur(6px);
}

h1, h2, h3 {
  font-family: "Space Grotesk", "IBM Plex Sans", Arial, sans-serif;
  color: var(--ink);
}

h1 {
  margin: 0 0 10px;
  line-height: 1.08;
  font-size: 2rem;
}

h2 {
  margin: 0 0 14px;
}

p {
  margin: 0;
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.74rem;
  font-weight: 600;
  color: #0f766e;
}

.lead {
  margin: 0 0 16px;
  color: var(--muted);
  max-width: 62ch;
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  border: 0;
  cursor: pointer;
  padding: 8px 15px;
  transition: transform 160ms ease, box-shadow 160ms ease;
  font-family: "IBM Plex Sans", Arial, sans-serif;
  font-size: 0.95rem;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn.primary {
  background: var(--accent);
  color: var(--accent-ink);
  box-shadow: 0 6px 16px rgba(15, 118, 110, 0.24);
}

.btn.secondary {
  border: 1px solid var(--line);
  color: var(--ink);
  background: #ffffffcc;
}

.game-panel {
  display: grid;
  gap: 12px;
}

.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.game-header h2 {
  margin-bottom: 0;
}

.scoreboard {
  display: flex;
  gap: 14px;
  color: var(--muted);
  font-weight: 600;
}

#game-canvas {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(180deg, #dbeafe 0%, #ecfeff 65%, #fef3c7 100%);
  touch-action: manipulation;
}

.game-message {
  color: var(--muted);
  font-size: 0.95rem;
}

.control-hint {
  color: var(--muted);
  line-height: 1.55;
}

.hidden {
  display: none;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  background: var(--surface);
}

.card p {
  color: var(--muted);
  font-size: 0.95rem;
}

ol {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

li + li {
  margin-top: 8px;
}

@media (max-width: 720px) {
  .page {
    margin: 18px auto;
  }

  .panel {
    padding: 20px 16px;
  }

  h1 {
    font-size: 1.62rem;
  }

  .scoreboard {
    width: 100%;
    justify-content: space-between;
  }
}