:root {
  color-scheme: dark;
  --bg: #111622;
  --panel: rgb(23 34 50 / 88%);
  --panel-border: rgb(125 153 196 / 45%);
  --accent: #cf9f4a;
  --text: #ecf2ff;
}

* {
  box-sizing: border-box;
  font-family: "Noto Sans TC", "PingFang TC", sans-serif;
}

body {
  margin: 0;
  background: radial-gradient(circle at top, #29364d, var(--bg));
  color: var(--text);
}

.screen {
  display: none;
  min-height: 100vh;
  padding: 1.5rem;
}

.screen.active {
  display: block;
}

.panel {
  max-width: 760px;
  margin: 8vh auto;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 2rem;
  box-shadow: 0 12px 32px #0008;
}

.subtitle,
.menu-message {
  color: #b8c9e8;
}

.menu {
  display: grid;
  gap: 0.7rem;
  width: min(320px, 100%);
}

button {
  background: rgb(31 50 76 / 85%);
  color: var(--text);
  border: 1px solid #6d86ac;
  border-radius: 8px;
  padding: 0.55rem 0.8rem;
  cursor: pointer;
}

button.primary {
  background: var(--accent);
  color: #21180a;
  font-weight: 700;
}

#map-screen {
  padding: 0;
  min-height: 100vh;
}

#world-canvas {
  width: 100vw;
  height: 100vh;
  display: block;
}