* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #0f1419;
  color: #e6e6e6;
  min-height: 100vh;
}
header {
  background: #161b22;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  border-bottom: 1px solid #21262d;
}
header h1 { font-size: 20px; }
.badge {
  background: #238636; color: #fff; font-size: 11px;
  padding: 2px 8px; border-radius: 10px; vertical-align: middle;
}
.roombar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-left: auto; }
input {
  background: #0d1117; border: 1px solid #30363d; color: #e6e6e6;
  padding: 8px 10px; border-radius: 6px; width: 140px;
}
button {
  background: #238636; color: #fff; border: 0; padding: 8px 14px;
  border-radius: 6px; cursor: pointer; font-size: 14px;
}
button:disabled { background: #2d333b; color: #8b949e; cursor: not-allowed; }
button.danger { background: #da3633; }
.conn { font-size: 12px; }
.conn.on { color: #3fb950; }
.conn.off { color: #f85149; }

main { max-width: 900px; margin: 20px auto; padding: 0 16px; }
.card {
  background: #161b22; border: 1px solid #21262d; border-radius: 10px;
  padding: 16px; margin-bottom: 16px;
}
.hidden { display: none !important; }
h2 { font-size: 15px; margin-bottom: 10px; color: #8b949e; }
ul#players { list-style: none; }
ul#players li { padding: 6px 0; border-bottom: 1px solid #21262d; }
.tip { color: #8b949e; font-size: 13px; margin-top: 8px; }

.botsel { margin-top: 14px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.seg { display: inline-flex; border: 1px solid #30363d; border-radius: 8px; overflow: hidden; }
.seg button { background: #0d1117; color: #8b949e; border: 0; padding: 8px 16px; }
.seg button.on { background: #238636; color: #fff; }

.statusbar { display: flex; gap: 24px; font-size: 14px; }
.statusbar b { color: #f0b429; }

.discard {
  background: #0d1117; border: 1px solid #21262d; border-radius: 8px;
  padding: 10px; margin-bottom: 8px; font-size: 16px; line-height: 1.6;
}
.pname { color: #8b949e; margin-right: 8px; }
.dtiles { letter-spacing: 2px; }

.myhand .tiles { display: flex; flex-wrap: wrap; gap: 6px; }
.tile {
  background: #f5efe0; color: #222; font-size: 26px;
  width: 48px; height: 60px; border: 1px solid #ccc; border-radius: 6px;
  cursor: default; padding: 0; line-height: 1;
}
.tile.clickable { cursor: pointer; box-shadow: 0 0 0 2px #f0b429; }
.tile.clickable:hover { transform: translateY(-4px); }
.actions { margin-top: 12px; display: flex; gap: 12px; align-items: center; }
.msg { color: #f0b429; font-size: 14px; }

#result pre {
  background: #0d1117; padding: 14px; border-radius: 8px;
  font-size: 14px; line-height: 1.7; white-space: pre-wrap;
}