:root {
  --bg: #09111f;
  --bg-accent: #10233e;
  --panel: rgba(9, 17, 31, 0.82);
  --panel-edge: rgba(151, 199, 255, 0.18);
  --text: #eef4ff;
  --muted: #93a6c6;
  --highlight: #ffb84d;
  --danger: #ff6b6b;
  --shadow: 0 24px 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(79, 172, 254, 0.28), transparent 32%),
    radial-gradient(circle at bottom left, rgba(255, 184, 77, 0.22), transparent 24%),
    linear-gradient(160deg, var(--bg) 0%, #050912 100%);
}

.layout {
  width: min(1180px, calc(100vw - 32px));
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(250px, 320px) minmax(280px, 360px) minmax(250px, 320px);
  gap: 24px;
  align-items: center;
  padding: 32px 0;
}

.panel {
  padding: 24px;
  border: 1px solid var(--panel-edge);
  border-radius: 24px;
  background: var(--panel);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--highlight);
  font-size: 0.78rem;
}

h1,
h2,
p,
ul {
  margin-top: 0;
}

h1 {
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  line-height: 0.95;
  margin-bottom: 16px;
}

h2 {
  font-size: 1.05rem;
  margin-bottom: 12px;
}

.summary,
.help p,
.help li {
  color: var(--muted);
  line-height: 1.55;
}

.stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 28px 0;
}

.stat {
  padding: 14px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.82rem;
  color: var(--muted);
}

.stat strong {
  font-size: 1.5rem;
}

.action {
  width: 100%;
  border: 0;
  border-radius: 999px;
  padding: 14px 18px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  color: #07101d;
  background: linear-gradient(135deg, #ffd166, #ff9f1c);
  transition: transform 120ms ease, filter 120ms ease;
}

.actions {
  display: grid;
  gap: 10px;
}

.secondary {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.action:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

.board-wrap {
  position: relative;
  justify-self: center;
}

canvas {
  display: block;
  width: min(360px, calc(100vw - 48px));
  height: auto;
  border-radius: 28px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: linear-gradient(180deg, rgba(10, 17, 31, 0.96), rgba(6, 10, 20, 0.98));
  box-shadow: var(--shadow);
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  padding: 24px;
  text-align: center;
  border-radius: 28px;
  background: rgba(4, 8, 15, 0.82);
}

.overlay.hidden {
  display: none;
}

.overlay h2 {
  font-size: 2rem;
  margin-bottom: 10px;
}

ul {
  padding-left: 18px;
}

kbd {
  padding: 4px 8px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-family: inherit;
  color: var(--text);
}

@media (max-width: 980px) {
  .layout {
    grid-template-columns: 1fr;
    justify-items: center;
  }

  .panel,
  .board-wrap {
    width: min(520px, 100%);
  }
}