:root {
  --bg: #0b1220;
  --ov: rgba(8, 14, 28, .9);
  --tx: #eaf2ff;
  --dim: rgba(234, 242, 255, .6);
  --ac: #38bdf8;
  --ac2: #f43f5e;
  --card: rgba(255, 255, 255, .06);
  --line: rgba(255, 255, 255, .12);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--tx);
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  overflow: hidden;
  overscroll-behavior: none;
  -webkit-tap-highlight-color: transparent;
}

canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
  display: block;
}

.ov {
  position: fixed;
  inset: 0;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: calc(16px + env(safe-area-inset-top, 0px)) 16px calc(16px + env(safe-area-inset-bottom, 0px));
  background: var(--ov);
  text-align: center;
  overflow-y: auto;
}

.ov h1 { margin: 0; font-size: clamp(26px, 6vw, 42px); }
.ov p { margin: 0; font-size: clamp(13px, 2.6vw, 17px); line-height: 1.6; }
.muted { opacity: .7; }
.hint { opacity: .65; font-size: clamp(12px, 2.4vw, 15px); min-height: 1.2em; }

.row { display: flex; gap: 12px; align-items: center; justify-content: center; }
.wrap { flex-wrap: wrap; }

button {
  font: inherit;
  font-size: clamp(15px, 3vw, 19px);
  font-weight: 700;
  padding: 10px 22px;
  border: 0;
  border-radius: 999px;
  background: var(--ac);
  color: #04121f;
  cursor: pointer;
  transition: transform .08s ease, opacity .15s ease;
}
button:active { transform: scale(.95); }
button:disabled { opacity: .4; transform: none; cursor: default; }

button.ghost {
  background: transparent;
  color: var(--tx);
  border: 1px solid var(--line);
}
button.link {
  background: none;
  border: 0;
  color: var(--dim);
  font-weight: 500;
  font-size: clamp(13px, 2.6vw, 16px);
  padding: 8px 10px;
}
button.small { font-size: 13px; padding: 6px 14px; }
button.block { width: 100%; }
button.primary { background: var(--ac); color: #04121f; }

.card {
  width: min(420px, 100%);
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
  border-radius: 18px;
  background: var(--card);
  border: 1px solid var(--line);
}

.field { display: flex; flex-direction: column; align-items: flex-start; gap: 6px; }
.field span { font-size: 13px; opacity: .65; }
input {
  width: 100%;
  font: inherit;
  font-size: 17px;
  padding: 11px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, .3);
  color: var(--tx);
  outline: none;
}
input:focus { border-color: var(--ac); }

/* ---------- 大厅 ---------- */
.lobby {
  justify-content: flex-start;
  gap: 10px;
  padding-top: calc(14px + env(safe-area-inset-top, 0px));
  overflow-y: auto;
}
.lobby-head {
  width: min(560px, 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.me { display: flex; align-items: center; gap: 8px; font-size: 17px; }
.tag {
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(56, 189, 248, .18);
  color: var(--ac);
  font-weight: 700;
}
#btnQuick { max-width: 560px; }
#btnQuick.queued { background: #f59e0b; }

.users {
  list-style: none;
  margin: 0;
  padding: 0;
  width: min(560px, 100%);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.users li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 14px;
  background: var(--card);
  border: 1px solid transparent;
}
.users li.self { border-color: rgba(56, 189, 248, .35); }
.users .dot { width: 8px; height: 8px; border-radius: 50%; background: #22c55e; flex: none; }
.users .dot.queued { background: #f59e0b; }
.users .dot.inviting, .users .dot.invited { background: #a855f7; }
.users .dot.playing { background: #64748b; }
.users .uname {
  flex: 1;
  text-align: left;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 16px;
}
.users .urating { font-size: 13px; color: var(--dim); font-variant-numeric: tabular-nums; }
.users button { font-size: 14px; padding: 7px 16px; }

/* ---------- 游戏 HUD ---------- */
#hud {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 4;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: calc(10px + env(safe-area-inset-top, 0px)) 14px 0 calc(14px + env(safe-area-inset-left, 0px));
  pointer-events: none;
}
#hud button { pointer-events: auto; background: rgba(0, 0, 0, .35); color: var(--tx); border: 1px solid var(--line); }
.hud-right { display: flex; align-items: center; gap: 10px; padding-top: 4px; }
.hud-opp { font-size: 14px; opacity: .8; max-width: 40vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ping { font-size: 12px; color: var(--dim); font-variant-numeric: tabular-nums; }
.hud-turn {
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(0, 0, 0, .35);
  border: 1px solid var(--line);
  color: var(--dim);
  white-space: nowrap;
}
.hud-turn.on { color: #7dd3fc; border-color: rgba(56, 189, 248, .6); }

/* ---------- 排行榜 ---------- */
.board-head {
  width: min(560px, 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.board-list {
  width: min(560px, 100%);
  margin: 0;
  padding: 0 0 0 1.6em;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 6px;
  overflow-y: auto;
}
.board-list li {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-size: 15px;
  padding: 6px 10px;
  border-radius: 10px;
  background: var(--card);
}
.board-list .r { color: var(--ac); font-weight: 700; font-variant-numeric: tabular-nums; }

/* ---------- 提示 ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: calc(28px + env(safe-area-inset-bottom, 0px));
  transform: translateX(-50%);
  z-index: 20;
  max-width: 80vw;
  padding: 10px 18px;
  border-radius: 999px;
  background: rgba(0, 0, 0, .78);
  color: #fff;
  font-size: 14px;
  pointer-events: none;
}

/* ---------- 横屏提示 ---------- */
#rot { display: none; z-index: 3; }
@media (orientation: portrait) {
  #rot { display: flex; }
}

/* ---------- 矮屏（手机横屏）压缩布局 ---------- */
@media (max-height: 480px) {
  .ov { gap: 8px; padding: 8px 12px; }
  .ov h1 { font-size: 22px; }
  .ov p.muted { display: none; }
  .card { padding: 10px; gap: 8px; }
  .field span { display: none; }
  input { padding: 8px 12px; font-size: 15px; }
  button { padding: 8px 16px; font-size: 15px; }
  .users li { padding: 8px 12px; }
}