:root {
  --bg: #070b18;
  --bg-soft: #0d1426;
  --panel: #121a33;
  --line: rgba(255, 255, 255, .08);
  --text: #e9f0ff;
  --muted: #93a4c8;
  --accent: #4cc9f0;
  --gold: #ffd166;
  --green: #4ade80;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at 15% -10%, #1b2547 0%, transparent 60%),
    radial-gradient(900px 500px at 100% 0%, #16203c 0%, transparent 55%),
    var(--bg);
  color: var(--text);
  font: 15px/1.65 system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  display: flex;
  flex-direction: column;
}

.site-head { padding: 28px 20px 6px; text-align: center; }
.brand {
  margin: 0;
  font-size: clamp(26px, 5vw, 40px);
  letter-spacing: 2px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-shadow: 0 0 22px rgba(76, 201, 240, .35);
}
.brand-dot {
  width: 14px; height: 14px; border-radius: 4px;
  background: linear-gradient(140deg, var(--accent), #7b5cff);
  box-shadow: 0 0 16px var(--accent);
}
.slogan { margin: 6px 0 0; color: var(--muted); font-size: 14px; letter-spacing: 1px; }

.wrap {
  flex: 1;
  width: min(1220px, 100%);
  margin: 0 auto;
  padding: 20px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 20px;
  align-items: start;
}

/* ---------- 游戏区 ---------- */
.stage { min-width: 0; }

.hud {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  padding: 12px 16px;
  margin-bottom: 12px;
  background: linear-gradient(180deg, rgba(255, 255, 255, .05), rgba(255, 255, 255, .02));
  border: 1px solid var(--line);
  border-radius: 14px;
}
.hud-item { display: flex; align-items: baseline; gap: 7px; }
.hud-label { color: var(--muted); font-size: 12px; letter-spacing: 1px; }
.hud-item strong { font-size: 20px; font-variant-numeric: tabular-nums; }
.hud-item .lives { color: var(--green); letter-spacing: 2px; }
#combo { color: var(--gold); }
.hud-tools { margin-left: auto; display: flex; gap: 8px; }

.chip {
  background: rgba(255, 255, 255, .06);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  cursor: pointer;
  transition: .18s;
}
.chip:hover { background: rgba(76, 201, 240, .16); border-color: rgba(76, 201, 240, .5); }

.board {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  background: #0a0e1d;
  box-shadow: 0 22px 60px rgba(0, 0, 0, .5), inset 0 0 60px rgba(76, 201, 240, .05);
}
#game { display: block; width: 100%; height: auto; touch-action: none; cursor: none; }

.keys { color: var(--muted); font-size: 13px; margin: 12px 2px 0; }
kbd {
  background: rgba(255, 255, 255, .08);
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 5px;
  padding: 1px 6px;
  margin: 0 2px;
  font: 12px ui-monospace, Consolas, monospace;
}

/* ---------- 遮罩卡片 ---------- */
.mask {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
  background: rgba(6, 9, 20, .78);
  backdrop-filter: blur(3px);
}
.mask[hidden] { display: none; }
.card {
  width: min(430px, 100%);
  text-align: center;
  padding: 24px 26px;
  border-radius: 16px;
  background: linear-gradient(180deg, #16203f, #0f1730);
  border: 1px solid rgba(76, 201, 240, .3);
  box-shadow: 0 18px 50px rgba(0, 0, 0, .55);
}
.card h2 { margin: 0 0 10px; font-size: 24px; letter-spacing: 1px; }
.card p { margin: 0 0 14px; color: var(--muted); font-size: 14px; }
.card .final { color: var(--text); font-size: 15px; }
.card .final strong { color: var(--gold); font-size: 20px; }

.nick { display: flex; align-items: center; gap: 10px; margin: 0 0 16px; }
.nick span { color: var(--muted); font-size: 13px; flex: none; }
.nick input {
  flex: 1;
  min-width: 0;
  background: rgba(0, 0, 0, .35);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  padding: 10px 12px;
  font-size: 15px;
}
.nick input:focus { outline: none; border-color: var(--accent); }

.btn-primary, .btn-ghost {
  border-radius: 12px;
  padding: 12px 26px;
  font-size: 16px;
  cursor: pointer;
  transition: .18s;
}
.btn-primary {
  border: 0;
  color: #04121f;
  background: linear-gradient(135deg, var(--accent), #7bd8ff);
  font-weight: 700;
  box-shadow: 0 10px 26px rgba(76, 201, 240, .3);
}
.btn-primary:hover { transform: translateY(-1px); filter: brightness(1.08); }
.btn-primary:disabled { opacity: .55; cursor: progress; transform: none; }
.btn-ghost {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent); }
.row-btns { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.tip { min-height: 20px; margin: 12px 0 0; font-size: 13px; color: var(--accent); }

/* ---------- 侧栏 ---------- */
.side { display: grid; gap: 16px; }
.panel {
  background: linear-gradient(180deg, rgba(255, 255, 255, .05), rgba(255, 255, 255, .02));
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px 18px;
}
.panel h2 { margin: 0 0 12px; font-size: 17px; display: flex; align-items: baseline; gap: 8px; }
.panel h2 small { color: var(--muted); font-size: 12px; font-weight: 400; }

.board-list { list-style: none; margin: 0; padding: 0; }
.board-list li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 10px;
  padding: 8px 6px;
  border-bottom: 1px dashed rgba(255, 255, 255, .07);
  font-size: 14px;
}
.board-list li:last-child { border-bottom: 0; }
.board-list .rk { color: var(--muted); font-variant-numeric: tabular-nums; }
.board-list .nm { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.board-list .sc { color: var(--gold); font-weight: 700; font-variant-numeric: tabular-nums; }
.board-list .lv { color: var(--muted); font-size: 12px; }
.board-list .gold .rk, .board-list .gold .nm { color: var(--gold); }
.board-list .empty { display: block; color: var(--muted); font-size: 13px; text-align: center; padding: 14px 0; }
.best { margin: 12px 0 0; font-size: 12px; color: var(--muted); }

.rules { list-style: none; margin: 0; padding: 0; font-size: 14px; }
.rules li { margin: 7px 0; color: var(--muted); display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.rules b { color: var(--text); }
.rules i { width: 13px; height: 13px; border-radius: 4px; display: inline-block; flex: none; }
.c1 { background: var(--green); }
.c2 { background: #ffb020; }
.c3 { background: #ff5d5d; }
.pw { border-radius: 6px; padding: 0 7px; font-size: 12px; color: #06111f; font-weight: 700; }
.pw-wide { background: #38d9a5; }
.pw-multi { background: #ffd166; }
.pw-slow { background: #4cc9f0; }
.pw-life { background: #ff6b8b; }

/* ---------- 页脚备案 ---------- */
.site-footer {
  margin-top: 26px;
  padding: 18px 16px 26px;
  border-top: 1px solid var(--line);
  background: var(--bg-soft);
  text-align: center;
}
.foot-note { margin: 0 0 8px; color: rgba(147, 164, 200, .7); font-size: 12px; }
.beian { margin: 0; font-size: 13px; color: var(--muted); line-height: 2; }
.beian a { color: var(--muted); text-decoration: none; transition: .18s; }
.beian a:hover { color: var(--accent); }

@media (max-width: 980px) {
  .wrap { grid-template-columns: 1fr; }
  .side { grid-template-columns: 1fr; }
  #game { cursor: default; }
}
@media (max-width: 520px) {
  .wrap { padding: 12px; }
  .hud { gap: 8px 14px; padding: 10px 12px; }
  .hud-item strong { font-size: 17px; }
  .hud-tools { width: 100%; margin-left: 0; }
  .keys { font-size: 12px; }
}