:root {
  --bg-0: #02050a;
  --bg-1: #07111c;
  --bg-2: #0e1b28;
  --panel-bg: rgba(8, 14, 23, 0.92);
  --panel-border: #294154;
  --panel-soft: rgba(37, 59, 77, 0.76);
  --ink: #dce6f2;
  --muted: #90a6bb;
  --accent: #4f92b6;
  --accent-dark: #2d6685;
  --danger: #913641;
  --warn: #736332;
  --key-light: #14222f;
  --key-dark: #0b141e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at top, rgba(87, 122, 154, 0.2), transparent 36%),
    linear-gradient(180deg, var(--bg-2), var(--bg-1) 48%, var(--bg-0));
  font-family: "Lucida Console", "Courier New", monospace;
}

.app-shell {
  max-width: 1240px;
  margin: 0 auto;
  padding: 16px;
}

.top-bar {
  margin-bottom: 12px;
  padding: 12px;
  border: 4px solid #122033;
  background: rgba(8, 16, 28, 0.88);
  box-shadow: 0 0 0 1px rgba(138, 173, 201, 0.08) inset;
}

.top-bar h1 {
  margin: 0;
  font-size: 1.2rem;
}

.top-bar p {
  margin: 8px 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.layout {
  display: grid;
  grid-template-columns: minmax(320px, 500px) 1fr;
  gap: 16px;
}

.game-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

#gameCanvas {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 3 / 4;
  border: 4px solid #111923;
  image-rendering: pixelated;
  background: #050914;
  box-shadow:
    0 0 0 1px rgba(117, 149, 179, 0.15) inset,
    0 18px 45px rgba(0, 0, 0, 0.42);
}

.mode-hint {
  margin: 0;
  padding: 6px 8px;
  border: 2px solid #162536;
  background: rgba(10, 18, 29, 0.92);
  font-size: 0.75rem;
  text-align: center;
  color: var(--muted);
}

.side-panel {
  padding: 14px;
  border: 4px solid var(--panel-border);
  background: var(--panel-bg);
  box-shadow:
    0 0 0 1px rgba(138, 173, 201, 0.08) inset,
    0 18px 40px rgba(0, 0, 0, 0.3);
}

.side-panel h2,
.side-panel h3 {
  margin: 0 0 10px;
  font-size: 0.95rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 10px;
  margin-bottom: 12px;
  font-size: 0.75rem;
}

.stats-grid strong {
  min-width: 80px;
  text-align: right;
  color: #f2f7ff;
}

.live-grid {
  background: rgba(13, 24, 38, 0.84);
  padding: 10px;
  border: 2px solid #23384c;
}

.tf-grid {
  margin-bottom: 8px;
}

.tf-chart {
  width: 100%;
  height: auto;
  display: block;
  border: 2px solid #2b4257;
  background: #07111a;
  margin-bottom: 12px;
  image-rendering: pixelated;
}

.control-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

button {
  border: 2px solid #1c3f53;
  background: var(--accent);
  color: #f7fff8;
  padding: 8px 10px;
  font: inherit;
  font-size: 0.75rem;
  cursor: pointer;
}

button:hover {
  background: var(--accent-dark);
}

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

#pauseBtn {
  background: var(--warn);
  border-color: #473e1d;
}

#pauseBtn:hover {
  background: #756621;
}

#resetBtn {
  background: var(--danger);
  border-color: #521a23;
}

#resetBtn:hover {
  background: #742626;
}

.mode-select {
  margin: 12px 0 0;
  border: 2px solid #284052;
  padding: 8px;
  font-size: 0.75rem;
}

.mode-select legend {
  padding: 0 4px;
}

.mode-select label {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}

.space-wrap {
  margin-bottom: 12px;
  padding: 8px;
  border: 2px solid #243a4b;
  background: rgba(12, 22, 34, 0.82);
}

.space-key {
  width: 100%;
  max-width: 230px;
  margin: 0 auto;
  text-align: center;
  padding: 12px;
  border: 2px solid #31465b;
  border-bottom-width: 5px;
  background: var(--key-light);
  color: #d8e6f3;
}

.space-key.pressed {
  background: var(--key-dark);
  transform: translateY(2px);
  border-bottom-width: 3px;
}

.space-status {
  margin: 8px 0 0;
  text-align: center;
  font-size: 0.72rem;
  color: var(--muted);
}

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

  .side-panel {
    max-width: 650px;
    margin: 0 auto;
    width: 100%;
  }
}