:root {
  color-scheme: dark;
  --bg: #060b16;
  --panel: rgba(12, 22, 43, 0.9);
  --text: #ebf2ff;
  --muted: #9ab0d8;
  --line: rgba(124, 176, 255, 0.28);
  --primary: #44d3ff;
  --accent: #c084fc;
  --ok: #6ee7b7;
  --warn: #fbbf24;
  --bad: #f87171;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at 20% 10%, rgba(168, 85, 247, 0.12), transparent 40%),
    linear-gradient(160deg, #040913 0%, #0a1228 50%, #071222 100%);
  color: var(--text);
}

.game-topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(8px);
}

.game-topbar a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}

.game-topbar a:hover {
  color: var(--primary);
}

.game-topbar h1 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
}

.game-hud {
  display: flex;
  gap: 14px;
  font-size: 13px;
  color: var(--muted);
}

.game-hud strong {
  color: var(--text);
}

.game-stage {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}

.game-help {
  margin: 0 0 16px;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(12, 22, 43, 0.55);
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.game-hint-panel {
  margin: 0 0 16px;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid rgba(68, 211, 255, 0.35);
  background: rgba(68, 211, 255, 0.08);
}

.game-hint-panel::before {
  content: "💡 玩法提示";
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--primary);
}

.game-hint-summary {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.65;
  color: #c4d9f5;
}

.game-hint-steps {
  margin: 0;
  padding-left: 20px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.game-hint-steps li {
  margin-bottom: 4px;
}

.game-btn {
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid rgba(124, 176, 255, 0.4);
  background: rgba(68, 211, 255, 0.12);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.game-btn:hover {
  border-color: var(--primary);
  background: rgba(68, 211, 255, 0.22);
}

.game-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.game-msg {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 14px;
}

.game-msg.ok {
  background: rgba(110, 231, 183, 0.12);
  border: 1px solid rgba(110, 231, 183, 0.35);
  color: var(--ok);
}

.game-msg.bad {
  background: rgba(248, 113, 113, 0.12);
  border: 1px solid rgba(248, 113, 113, 0.35);
  color: var(--bad);
}

.game-footer-note {
  margin-top: 24px;
  text-align: center;
  font-size: 12px;
  color: var(--muted);
}