/* ==========================================================================================
   screens/lobby.css 鈥?mode cards (鐙珛/鍚岀洘), difficulty cards, create button, join panel.
   ========================================================================================== */

.lobby-body {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: .5rem;
  width: 100%;
  max-width: 19.2rem;
  margin: 0 auto;
  padding: .36rem .6rem .4rem;
  align-content: start;
}
.lobby-left, .lobby-right { display: flex; flex-direction: column; min-width: 0; }

/* ---- mode cards ------------------------------------------------------------------------------------ */
.mode-cards { display: grid; grid-template-columns: 1fr 1fr; gap: .24rem; margin-bottom: .34rem; }
.mode-card {
  --bk-c: transparent;
  --bk-l: .2rem;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .22rem;
  min-height: 4.3rem;
  padding: .34rem .32rem .3rem;
  overflow: hidden;
  text-align: left;
  background: linear-gradient(180deg, rgba(28, 34, 31, .92), rgba(13, 16, 15, .94));
  border: 1px solid var(--line);
  color: var(--text-hi);
  transition: border-color var(--t-med) var(--ease-out), box-shadow var(--t-med) var(--ease-out), transform var(--t-fast) var(--ease-out);
  animation: card-in var(--t-slow) var(--ease-out) backwards;
}
.mode-card:nth-child(2) { animation-delay: 60ms; }
.mode-card__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(70% 55% at 100% 0%, rgba(78, 216, 175, .10), transparent 70%),
    repeating-linear-gradient(-45deg, rgba(255, 255, 255, .018) 0 2px, transparent 2px 12px),
    linear-gradient(transparent 70%, rgba(0, 0, 0, .35));
  transition: opacity var(--t-med);
}
.mode-card::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--mint-500), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-slow) var(--ease-out);
}
.mode-card__icon {
  position: relative;
  width: .88rem;
  height: .88rem;
  display: grid;
  place-items: center;
  background: #0c0f0e;
  border: 1px solid var(--line-2);
  color: var(--text-md);
  clip-path: polygon(25% 0, 75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%);
  transition: background var(--t-med), color var(--t-med);
}
.mode-card__icon .icon { width: .44rem; height: .44rem; }
.mode-card__text { position: relative; display: flex; flex-direction: column; gap: .1rem; }
.mode-card__name { font-size: calc(.46 * var(--t)); font-weight: 900; letter-spacing: .08em; line-height: 1.1; }
.mode-card__desc { font-size: calc(.17 * var(--t)); color: var(--text-lo); line-height: 1.65; max-width: 3.6rem; }
.mode-card__points { display: flex; flex-direction: column; gap: .05rem; margin-top: .06rem; font-size: calc(.15 * var(--t)); color: var(--text-md); }
.mode-card__points span::before {
  content: '';
  display: inline-block;
  width: .06rem;
  height: .06rem;
  margin: 0 .1rem .02rem 0;
  background: var(--mint-700);
  transform: rotate(45deg);
  vertical-align: middle;
}
.mode-card__check {
  position: absolute;
  top: .2rem;
  right: .2rem;
  display: flex;
  align-items: center;
  gap: .05rem;
  padding: .04rem .12rem .04rem .08rem;
  background: var(--mint-500);
  color: var(--text-on-mint);
  font-size: calc(.14 * var(--t));
  font-weight: 700;
  opacity: 0;
  transform: translateY(-.06rem);
  transition: opacity var(--t-med), transform var(--t-med) var(--ease-out);
}
.mode-card__check .icon { width: .16rem; height: .16rem; }
.mode-card:hover { border-color: var(--line-3); --bk-c: var(--line-3); }
.mode-card:active { transform: translateY(1px); }
.mode-card.is-selected {
  --bk-c: var(--mint-400);
  border-color: var(--mint-700);
  box-shadow: 0 0 0 1px rgba(78, 216, 175, .22), 0 0 .44rem rgba(23, 249, 183, .13), inset 0 0 .7rem rgba(23, 249, 183, .05);
}
.mode-card.is-selected::before { transform: scaleX(1); }
.mode-card.is-selected .mode-card__icon { background: var(--mint-500); border-color: var(--mint-400); color: var(--text-on-mint); }
.mode-card.is-selected .mode-card__check { opacity: 1; transform: none; }
@keyframes card-in { from { opacity: 0; transform: translateY(.14rem); } }

/* ---- join panel ------------------------------------------------------------------------------------ */
.join-panel .panel__body { display: flex; flex-direction: column; gap: .14rem; padding: .22rem .26rem .18rem; }
.join-row { display: flex; gap: .16rem; align-items: stretch; }
.join-row .field { flex: 1; }
.join-row .btn { height: .64rem; }
.join-foot { display: flex; align-items: center; flex-wrap: wrap; gap: .1rem; min-height: .32rem; font-size: calc(.14 * var(--t)); }
.code-chip {
  padding: .03rem .12rem .03rem .16rem;
  border: 1px solid var(--line-2);
  background: rgba(0, 0, 0, .3);
  color: var(--amber);
  font-size: calc(.17 * var(--t));
  font-weight: 700;
  letter-spacing: .2em;
  transition: border-color var(--t-fast), background-color var(--t-fast);
}
.code-chip:hover { border-color: var(--amber); background: rgba(246, 163, 41, .08); }

/* ---- tips -------------------------------------------------------------------------------------------- */
.tips {
  --bk-c: var(--line-3);
  margin-top: .3rem;
  padding: .16rem .22rem .2rem;
  background: rgba(8, 10, 9, .55);
  border: 1px solid var(--line);
}
.tips__head { display: flex; align-items: center; gap: .1rem; font-size: calc(.16 * var(--t)); font-weight: 700; color: var(--text-md); }
.tips__head > .icon { width: .2rem; height: .2rem; color: var(--mint-500); }
.tips__idx { margin-left: auto; font-size: calc(.16 * var(--t)); color: var(--text-md); }
.tips__nav {
  display: grid;
  place-items: center;
  width: .3rem;
  height: .3rem;
  padding: 0;
  border: 1px solid var(--line-2);
  background: transparent;
  color: var(--text-lo);
  transition: color var(--t-fast), border-color var(--t-fast);
}
.tips__nav:hover { color: var(--mint-400); border-color: var(--mint-700); }
.tips__nav .icon { width: .18rem; height: .18rem; }
.tips__text { margin-top: .1rem; font-size: calc(.17 * var(--t)); color: var(--text-lo); line-height: 1.6; animation: tip-in var(--t-slow) var(--ease-out); }
@keyframes tip-in { from { opacity: 0; transform: translateX(.1rem); } }

/* ---- difficulty cards -------------------------------------------------------------------------------- */
.diff-list { display: flex; flex-direction: column; gap: .14rem; }
.diff-card {
  --d-color: var(--amber);
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-rows: auto auto auto;
  gap: .06rem .2rem;
  padding: .18rem .24rem .18rem .36rem;
  overflow: hidden;
  text-align: left;
  background: linear-gradient(90deg, rgba(28, 34, 31, .93), rgba(15, 19, 17, .93));
  border: 1px solid var(--line);
  color: var(--text-hi);
  transition: border-color var(--t-med), box-shadow var(--t-med), background var(--t-med);
  animation: card-in var(--t-slow) var(--ease-out) backwards;
}
.diff-card:nth-child(2) { animation-delay: 40ms; }
.diff-card:nth-child(3) { animation-delay: 80ms; }
.diff-card:nth-child(4) { animation-delay: 120ms; }
.diff-card__bar { position: absolute; left: 0; top: 0; bottom: 0; width: .06rem; background: var(--d-color); opacity: .45; transition: opacity var(--t-med), box-shadow var(--t-med); }
.diff-card__head { grid-column: 1 / -1; display: flex; align-items: center; gap: .1rem; min-width: 0; }
.diff-card__glyph { width: .28rem; height: .28rem; color: var(--d-color); filter: drop-shadow(0 0 5px var(--d-color)); filter: drop-shadow(0 0 5px color-mix(in srgb, var(--d-color) 55%, transparent)); }
.diff-card__name { font-size: calc(.27 * var(--t)); font-weight: 900; letter-spacing: .06em; color: var(--d-color); }
.diff-card__code { font-size: calc(.14 * var(--t)); color: var(--text-dim); letter-spacing: .1em; }
.diff-card__meta { margin-left: auto; display: flex; align-items: center; gap: .04rem; font-size: calc(.14 * var(--t)); color: var(--text-lo); white-space: nowrap; }
.diff-card__meta .num { color: var(--text-hi); font-weight: 700; font-size: calc(.17 * var(--t)); }
.diff-card__hidden {
  margin-left: .08rem;
  padding: 0 .07rem;
  border: 1px solid transparent; border: 1px solid color-mix(in srgb, var(--d-color) 45%, transparent);
  color: var(--d-color); color: color-mix(in srgb, var(--d-color) 80%, #fff);
  font-size: calc(.12 * var(--t));
  line-height: 1.6;
}
.diff-card__desc { grid-column: 1; font-size: calc(.16 * var(--t)); color: var(--text-md); }
.diff-card__effects { grid-column: 1; display: flex; flex-wrap: wrap; gap: .04rem .2rem; font-size: calc(.14 * var(--t)); color: var(--text-lo); }
.diff-card__effects span::before { content: '路'; margin-right: .05rem; color: var(--d-color); font-weight: 900; }
/* battlefield pool note (config.json modes[].stages): 鎴樺満鍥哄畾涓?鎴樺満#01 / 鎴樺満闅忔満锛堝叡N寮狅級 鈥?the last item of the
   effects row (no extra card height: the lobby must not scroll at 1280脳720 / 1920脳1080) */
.diff-card__effects .diff-card__stage { display: inline-flex; align-self: flex-start; align-items: center; gap: .05rem; }
.diff-card__effects .diff-card__stage::before { content: none; }
.diff-card__stage .icon { flex: none; width: .15rem; height: .15rem; color: var(--d-color); opacity: .85; }
.diff-card__check {
  grid-column: 2;
  grid-row: 2 / span 2;
  align-self: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .03rem;
  font-size: calc(.12 * var(--t));
  color: var(--text-dim);
}
.diff-card__check .icon {
  width: .46rem;
  height: .46rem;
  padding: .09rem;
  border-radius: 50%;
  border: 2px solid var(--line-2);
  color: transparent;
  transition: background var(--t-med), border-color var(--t-med), color var(--t-med), transform var(--t-med) var(--ease-out);
}
.diff-card__check span { opacity: 0; transition: opacity var(--t-med); }
.diff-card:hover { border-color: var(--line-3); }
.diff-card.is-selected {
  border-color: var(--d-color); border-color: color-mix(in srgb, var(--d-color) 65%, transparent);
  background: linear-gradient(90deg, #151a18, rgba(15, 19, 17, .95) 70%); background: linear-gradient(90deg, color-mix(in srgb, var(--d-color) 15%, #151a18), rgba(15, 19, 17, .95) 70%);
  box-shadow: 0 0 .3rem transparent; box-shadow: 0 0 .3rem color-mix(in srgb, var(--d-color) 16%, transparent);
}
.diff-card.is-selected .diff-card__bar { opacity: 1; box-shadow: 0 0 .14rem var(--d-color); }
.diff-card.is-selected .diff-card__check { color: var(--d-color); }
.diff-card.is-selected .diff-card__check .icon { background: var(--d-color); border-color: var(--d-color); color: #150a04; transform: rotate(-8deg); }
.diff-card.is-selected .diff-card__check span { opacity: 1; }

/* ---- create ------------------------------------------------------------------------------------------ */
.create-box { margin-top: .3rem; display: flex; flex-direction: column; gap: .12rem; }
.create-box__test {
  display: flex; flex-direction: row; flex-wrap: wrap; align-items: center; gap: .04rem .1rem;
  color: #e8b84a; font-size: calc(.16 * var(--t));
}
.create-box__test input { width: .2rem; height: .2rem; margin: 0; flex: none; accent-color: #e8b84a; }
.create-box__test em { flex-basis: 100%; font-style: normal; }
@media (max-width: 720px) {
  .create-box__test { font-size: 16px; }
  .create-box__test input { width: 32px; height: 32px; }
  .create-box__test em { font-size: 14px; }
}
.create-box .btn--xl { height: .92rem; font-size: calc(.32 * var(--t)); letter-spacing: .3em; }
.create-box__hint { display: flex; align-items: center; justify-content: center; min-height: .3rem; font-size: calc(.14 * var(--t)); color: var(--text-lo); }

/* ---- room visibility at creation ------------------------------------------------------------------- */
.create-box__vis { display: grid; grid-template-columns: 1fr 1fr; gap: .08rem; }
.vis-opt {
  display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 0 .08rem;
  padding: .08rem .1rem; background: rgba(0, 0, 0, .3); border: 1px solid var(--line);
  color: var(--text-lo); text-align: left; font-size: calc(.16 * var(--t)); transition: border-color var(--t-fast), color var(--t-fast), background var(--t-fast);
}
.vis-opt .icon { width: .22rem; height: .22rem; color: var(--mint-500); grid-row: span 2; }
.vis-opt small { font-size: calc(.12 * var(--t)); color: var(--text-dim); }
.vis-opt:hover { border-color: var(--mint-700); color: var(--text-hi); }
.vis-opt.is-active { border-color: var(--mint-500); color: var(--mint-400); background: rgba(78, 216, 175, .08); }
.vis-opt.is-active small { color: var(--text-md); }
.create-box__note .tf { width: 100%; }

/* ---- lobby 鍏紑鍚岀洘 list ----------------------------------------------------------------------------- */
.lobby-rooms { min-width: 0; margin-top: .16rem; }
.lobby-rooms__n { margin-left: .08rem; padding: 0 .06rem; background: var(--mint-600); color: #06120e; font-size: calc(.14 * var(--t)); }
.lobby-rooms__more {
  margin-left: auto;
  padding: .015rem .08rem;
  border: 1px solid rgba(78, 216, 175, .28);
  background: rgba(78, 216, 175, .06);
  color: var(--mint-300);
  font-size: calc(.11 * var(--t));
  letter-spacing: .04em;
}
.lobby-rooms__more:hover { border-color: var(--mint-400); }

/* maintenance stamps: red, italic and diagonal over the disabled action */
.maintenance-btn { position: relative; display: inline-flex; }
.maintenance-btn em,
.lobby-mode__maint {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 2;
  transform: translate(-50%, -50%) rotate(-13deg);
  color: #ff5b5b;
  font-style: italic;
  font-weight: 900;
  letter-spacing: .12em;
  white-space: nowrap;
  text-shadow: 0 0 .16rem rgba(255, 40, 40, .65), 0 1px 2px rgba(0, 0, 0, .8);
  pointer-events: none;
}
.maintenance-btn em { top: -.08rem; right: -.12rem; left: auto; transform: rotate(-13deg); font-size: calc(.11 * var(--t)); }
.lobby-mode__maint { font-size: calc(.22 * var(--t)); }
.lobby-mode-btn.is-maintenance { opacity: .62; }
.lobby-room-list {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(4.5rem, 1fr)); gap: .14rem;
  max-height: 2.9rem; overflow-y: auto; padding-right: .08rem; scrollbar-width: thin;
}
.lroom {
  display: flex; flex-direction: column; gap: .06rem; min-width: 0; padding: .14rem .16rem .12rem;
  background: linear-gradient(180deg, rgba(29, 35, 32, .92), rgba(11, 14, 13, .96)); border: 1px solid var(--line);
  box-shadow: 0 .1rem .24rem rgba(0, 0, 0, .35);
}
.lroom.is-running { border-color: var(--amber); }
.lroom__head { display: flex; align-items: center; gap: .08rem; min-width: 0; flex-wrap: wrap; }
.lroom__code { font-size: calc(.26 * var(--t)); font-weight: 700; color: var(--mint-400); letter-spacing: .08em; }
.lroom__host { font-size: calc(.16 * var(--t)); color: var(--text-hi); max-width: 2.2rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lroom__diff { display: inline-flex; align-items: center; gap: .03rem; font-size: calc(.12 * var(--t)); color: var(--text-lo); }
.lroom__diff .difficulty-icon, .lroom__diff svg { width: .16rem; height: .16rem; }
.lroom__state { margin-left: auto; font-size: calc(.13 * var(--t)); font-weight: 700; letter-spacing: .04em; }
.lroom__state.is-waiting { color: var(--mint-400); }
.lroom__state.is-running { color: var(--amber); }
.lroom__note { margin: 0; min-height: .34rem; font-size: calc(.14 * var(--t)); line-height: 1.4; color: var(--text-md); overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.lroom__note.is-empty { color: var(--text-dim); }
.lroom__meta { display: flex; align-items: center; gap: .12rem; font-size: calc(.13 * var(--t)); color: var(--text-lo); }
.lroom__meta span { display: inline-flex; align-items: center; gap: .03rem; }
.lroom__meta .icon { width: .15rem; height: .15rem; color: var(--mint-600); }
.lroom__foot { display: flex; gap: .08rem; margin-top: .02rem; }
.lroom__foot .btn { flex: 1 1 0; min-width: 0; }
.lobby-rooms__empty {
  display: flex; align-items: center; justify-content: center; gap: .1rem; min-height: 1.2rem;
  border: 1px dashed var(--line-2); color: var(--text-lo); font-size: calc(.15 * var(--t));
}
.lobby-rooms__empty .icon { width: .3rem; height: .3rem; color: var(--line-3); }
.lobby-rooms__empty p { margin: 0; }

@media (max-width: 720px) {
  .lobby-room-list { grid-template-columns: 1fr; max-height: 6rem; }
  .create-box__vis { grid-template-columns: 1fr; }
}

/* ==========================================================================================
   Official-style battle console: a centred isometric board, left assignment rail, right
   difficulty column, and the large gold launch action. Scoped to the lobby screen.
   ========================================================================================== */
.lobby-screen {
  position: absolute;
  inset: 0;
  isolation: isolate;
  overflow: hidden;
  background:
    radial-gradient(80% 90% at 50% 68%, rgba(17, 67, 56, .32), transparent 62%),
    #040907;
}
.lobby-screen::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(3, 8, 7, .9) 0%, rgba(3, 8, 7, .18) 40%, rgba(3, 8, 7, .88) 100%),
    url('/assets/ui/entry/bg_mountains_tiled.png') bottom center / cover no-repeat;
  opacity: .8;
  filter: saturate(.65) brightness(.8);
}
.lobby-screen::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    repeating-linear-gradient(0deg, rgba(255, 255, 255, .022) 0 1px, transparent 1px 4px),
    radial-gradient(70% 75% at 50% 45%, transparent 35%, rgba(0, 0, 0, .58) 100%);
}
.lobby-horizon {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3.1rem;
  z-index: 0;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 0%, rgba(78, 216, 175, .16) 58%, rgba(78, 216, 175, .035) 100%);
  -webkit-mask: url('/assets/ui/entry/bg_mountains_tiled.png') bottom center / 100% 100% no-repeat;
  mask: url('/assets/ui/entry/bg_mountains_tiled.png') bottom center / 100% 100% no-repeat;
  opacity: .55;
}
.lobby-footer {
  position: absolute;
  left: .6rem;
  right: .6rem;
  bottom: .16rem;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .2rem;
  padding-top: .09rem;
  border-top: 1px solid rgba(78, 216, 175, .18);
  color: var(--text-dim);
  font-family: var(--font-num);
  font-size: calc(.11 * var(--t));
  letter-spacing: .14em;
  pointer-events: none;
}
.lobby-footer b { color: var(--mint-500); font-size: .7em; }
.lobby-footer__brand { color: var(--text-lo); }
.lobby-footer__brand i { color: var(--amber); font-style: normal; }
.lobby-screen .topbar {
  background: linear-gradient(180deg, rgba(3, 8, 7, .92), rgba(3, 8, 7, .2) 72%, transparent);
  border-bottom: 1px solid rgba(78, 216, 175, .16);
}
.lobby-toolbar { display: flex; align-items: center; gap: .08rem; }
.lobby-toolbar .btn--square.btn--sm { --sq: .46rem; height: var(--sq); min-width: var(--sq); }
.lobby-toolbar__fs { width: .46rem; height: .46rem; flex: none; }
.sp-coarse .lobby-toolbar .btn--square.btn--sm { --sq: max(.56rem, 40px); }
.sp-coarse .lobby-toolbar__fs { width: max(.56rem, 40px); height: max(.56rem, 40px); }
.lobby-toolbar__fs .icon { width: .24rem; height: .24rem; }
.lobby-tool-wrap { position: relative; display: inline-flex; }
.lobby-tool { color: var(--text-lo); }
.lobby-tool:hover { color: var(--mint-400); border-color: var(--mint-700); }
.lobby-music-btn.is-playing { color: var(--mint-300); border-color: var(--mint-500); animation: lobby-music-pulse 1.6s ease-in-out infinite; }
@keyframes lobby-music-pulse { 50% { box-shadow: 0 0 .18rem rgba(78, 216, 175, .42); } }
.lobby-media-menu {
  position: absolute;
  top: calc(100% + .09rem);
  left: 0;
  z-index: 60;
  width: 2.6rem;
  padding: .08rem;
  display: flex;
  flex-direction: column;
  gap: .02rem;
  border: 1px solid rgba(78, 216, 175, .28);
  background: linear-gradient(160deg, rgba(14, 23, 20, .99), rgba(4, 8, 7, .99));
  box-shadow: 0 .18rem .5rem rgba(0, 0, 0, .55);
}
.lobby-media-menu.is-music { width: 2.9rem; }
.lobby-media-menu button {
  padding: .07rem .08rem;
  border: 0;
  background: none;
  color: var(--text-md);
  text-align: left;
  font-size: calc(.13 * var(--t));
}
.lobby-media-menu button:hover { background: rgba(78, 216, 175, .09); color: var(--mint-200); }
.lobby-media-menu button:disabled { opacity: .4; }
.lobby-media-menu__vol { display: flex; align-items: center; gap: .08rem; padding: .06rem .08rem; color: var(--text-lo); font-size: calc(.12 * var(--t)); }
.lobby-media-menu__vol input { flex: 1; min-width: 0; accent-color: var(--mint-500); }
.lobby-media-menu small { padding: .04rem .08rem; color: var(--text-dim); font-size: calc(.1 * var(--t)); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lobby-screen audio { display: none; }

/* ---- slow atmosphere: drifting mist, dust motes and a soft scan sweep -------------------------------- */
.lobby-fx { position: absolute; inset: 0; z-index: 0; overflow: hidden; pointer-events: none; }
.lobby-fx::before {
  content: '';
  position: absolute;
  inset: -18%;
  background:
    radial-gradient(32% 28% at 28% 58%, rgba(78, 216, 175, .10), transparent 70%),
    radial-gradient(26% 24% at 72% 38%, rgba(246, 163, 41, .06), transparent 72%);
  animation: lobby-fx-drift 28s ease-in-out infinite alternate;
}
.lobby-fx::after {
  content: '';
  position: absolute;
  inset: -30%;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(190, 255, 235, .5) 0 1px, transparent 1.5px),
    radial-gradient(circle at 70% 60%, rgba(190, 255, 235, .35) 0 1px, transparent 1.5px);
  background-size: 3.4rem 3.1rem, 4.8rem 4.2rem;
  opacity: .25;
  animation: lobby-fx-dust 44s linear infinite;
}
.lobby-fx span {
  position: absolute;
  left: 0;
  right: 0;
  height: 30%;
  background: linear-gradient(180deg, transparent, rgba(156, 255, 226, .035), transparent);
  animation: lobby-fx-sweep 12s linear infinite;
}
.lobby-fx span:last-child { height: 12%; animation-duration: 19s; animation-delay: -7s; opacity: .6; }
@keyframes lobby-fx-drift { from { transform: translate3d(-1.2%, 0, 0) scale(1); } to { transform: translate3d(1.2%, -1%, 0) scale(1.04); } }
@keyframes lobby-fx-dust { from { transform: translate3d(0, 0, 0); } to { transform: translate3d(-1.2rem, -1.8rem, 0); } }
@keyframes lobby-fx-sweep { from { top: -35%; } to { top: 105%; } }
@media (prefers-reduced-motion: reduce) {
  .lobby-fx, .lobby-fx::before, .lobby-fx::after, .lobby-fx span, .lobby-music-btn.is-playing { animation: none !important; }
}
.lobby-screen .section-label { border-left: 2px solid rgba(246, 163, 41, .82); padding-left: .1rem; }
.lobby-screen .section-label__idx { color: var(--amber); }

.lobby-body {
  position: relative;
  z-index: 1;
  grid-template-columns: minmax(0, 5.05fr) minmax(0, 6.55fr) minmax(0, 5.65fr);
  gap: .34rem;
  align-items: start;
}
.lobby-left, .lobby-right { position: relative; z-index: 2; }

/* ---- centre scene: the official isometric board ------------------------------------------------ */
.lobby-scene {
  position: relative;
  min-height: 7.05rem;
  align-self: stretch;
  pointer-events: none;
}
.lobby-scene__floor {
  position: absolute;
  left: -6%;
  right: -6%;
  bottom: -4%;
  height: 48%;
  background:
    repeating-linear-gradient(90deg, rgba(78, 216, 175, .2) 0 1px, transparent 1px 42px),
    repeating-linear-gradient(0deg, rgba(78, 216, 175, .2) 0 1px, transparent 1px 30px);
  transform: perspective(480px) rotateX(60deg);
  transform-origin: bottom center;
  opacity: .22;
  -webkit-mask: linear-gradient(180deg, transparent, #000 55%);
  mask: linear-gradient(180deg, transparent, #000 55%);
}
.lobby-scene__board {
  position: absolute;
  left: 50%;
  top: 42%;
  width: 108%;
  max-width: 7.6rem;
  transform: translate(-50%, -50%);
  filter: drop-shadow(0 0 .38rem var(--d-color)) saturate(1.12) contrast(1.04);
  opacity: .95;
  animation: lobby-board-float 7s ease-in-out infinite;
}
@keyframes lobby-board-float {
  0%, 100% { transform: translate(-50%, -50%) translateY(0); }
  50% { transform: translate(-50%, -50%) translateY(-.06rem); }
}
.lobby-scene__hud {
  position: absolute;
  left: .25rem;
  right: auto;
  bottom: .1rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .03rem;
  text-align: left;
}
.lobby-scene__eyebrow { color: var(--mint-500); font-size: calc(.12 * var(--t)); letter-spacing: .34em; }
.lobby-scene__difficulty {
  display: flex;
  align-items: center;
  gap: .08rem;
  color: #f4f8f6;
  font-size: calc(.34 * var(--t));
  font-weight: 900;
  letter-spacing: .08em;
  line-height: 1.1;
  text-shadow: 0 0 .28rem rgba(23, 249, 183, .26);
}
.lobby-scene__difficulty i {
  display: block;
  width: .24rem;
  height: .24rem;
  background: var(--mint-500);
  clip-path: polygon(25% 0, 75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%);
  box-shadow: 0 0 .18rem rgba(78, 216, 175, .7);
}

/* ---- left rail: compact mode tabs + assignment panels ------------------------------------------ */
.lobby-left .mode-cards { grid-template-columns: 1fr; gap: .1rem; margin-bottom: .18rem; }
.lobby-left .mode-card {
  flex-direction: row;
  align-items: center;
  min-height: 0;
  padding: .13rem .15rem;
  gap: .12rem;
  background: linear-gradient(135deg, rgba(19, 30, 26, .9), rgba(5, 9, 8, .94));
  border-color: rgba(78, 216, 175, .2);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - .13rem), calc(100% - .13rem) 100%, 0 100%);
  backdrop-filter: blur(4px);
}
.lobby-left .mode-card__icon { width: .56rem; height: .56rem; flex: none; }
.lobby-left .mode-card__icon .icon { width: .3rem; height: .3rem; }
.lobby-left .mode-card__text { gap: .025rem; min-width: 0; }
.lobby-left .mode-card__name { font-size: calc(.27 * var(--t)); letter-spacing: .06em; }
.lobby-left .mode-card__desc { font-size: calc(.12 * var(--t)); line-height: 1.35; max-height: .34rem; overflow: hidden; max-width: none; }
.lobby-left .mode-card__points { display: none; }
.lobby-left .mode-card__check { top: .07rem; right: .07rem; padding: .02rem .06rem; font-size: calc(.1 * var(--t)); }
.lobby-left .mode-card__num { display: none; }
.lobby-left .mode-card__bg { opacity: .7; }
.lobby-left .lobby-rooms { margin-top: .12rem; }
.lobby-left .lobby-room-list { grid-template-columns: 1fr; max-height: 2.15rem; }
.lobby-left .lobby-rooms__empty { min-height: .9rem; font-size: calc(.13 * var(--t)); }
.lobby-left .join-panel .panel__body { padding: .16rem .18rem .14rem; gap: .1rem; }
.lobby-left .join-row { flex-wrap: wrap; gap: .08rem; }
.lobby-left .join-row .field { flex: 1 1 100%; }
.lobby-left .join-row .btn { height: .5rem; flex: 1 1 0; }
.lobby-left .join-foot { font-size: calc(.12 * var(--t)); }
.lobby-left .tips { margin-top: .16rem; padding: .12rem .16rem .14rem; }
.lobby-left .tips__text { font-size: calc(.14 * var(--t)); }
.lobby-left .tips__head { font-size: calc(.14 * var(--t)); }

/* ---- right rail: compact vertical difficulties + gold launch ----------------------------------- */
.lobby-right .diff-list { display: flex; flex-direction: column; gap: .07rem; }
.lobby-right .diff-card {
  min-height: 0;
  padding: .09rem .1rem .09rem .18rem;
  gap: .02rem .08rem;
  background: linear-gradient(145deg, rgba(20, 30, 26, .9), rgba(6, 10, 8, .95));
  border-color: rgba(78, 216, 175, .17);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - .11rem), calc(100% - .11rem) 100%, 0 100%);
  backdrop-filter: blur(4px);
}
.lobby-right .diff-card__head { gap: .06rem; }
.lobby-right .diff-card__glyph { width: .22rem; height: .22rem; }
.lobby-right .diff-card__name { font-size: calc(.22 * var(--t)); letter-spacing: .03em; }
.lobby-right .diff-card__code { font-size: calc(.11 * var(--t)); }
.lobby-right .diff-card__meta { font-size: calc(.11 * var(--t)); }
.lobby-right .diff-card__meta .num { font-size: calc(.13 * var(--t)); }
.lobby-right .diff-card__desc { font-size: calc(.13 * var(--t)); line-height: 1.35; }
.lobby-right .diff-card__effects { font-size: calc(.11 * var(--t)); gap: .01rem .1rem; line-height: 1.3; }
.lobby-right .diff-card__check .icon { width: .3rem; height: .3rem; padding: .05rem; }
.lobby-right .diff-card__check span { display: none; }
.lobby-right .diff-card__hidden { font-size: calc(.1 * var(--t)); }
.lobby-right .create-box {
  margin-top: .12rem;
  padding: .1rem .12rem .09rem;
  gap: .06rem;
  background: linear-gradient(180deg, rgba(17, 27, 23, .92), rgba(5, 9, 8, .96));
  border: 1px solid rgba(246, 163, 41, .26);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - .16rem), calc(100% - .16rem) 100%, 0 100%);
  backdrop-filter: blur(5px);
}
.lobby-right .create-box__vis { gap: .05rem; }
.lobby-right .vis-opt { padding: .05rem .06rem; font-size: calc(.13 * var(--t)); }
.lobby-right .vis-opt small { font-size: calc(.1 * var(--t)); }
.lobby-right .create-box .btn--xl { height: .72rem; font-size: calc(.25 * var(--t)); letter-spacing: .18em; }
.lobby-create.btn--primary,
.lobby-create.btn--primary:hover {
  background: linear-gradient(100deg, #ffdd73, #f2a92f 55%, #ffd45c) !important;
  border-color: #ffe3a0 !important;
  color: #1a0d02 !important;
  box-shadow: 0 0 .32rem rgba(246, 163, 41, .28), inset 0 0 0 1px rgba(255, 255, 255, .22);
  text-shadow: none;
}

@media (max-width: 1100px) {
  .lobby-body { grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); }
  .lobby-scene { display: none; }
}

/* ---- home / setup split: the mode dock replaces the old mode cards ------------------------------- */
.lobby-bg {
  position: absolute;
  inset: 0;
  z-index: -3;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  filter: saturate(.9) brightness(.7);
  opacity: .72;
  pointer-events: none;
}
.lobby-screen.has-bg::before { opacity: .22; }
.lobby-body.is-home {
  grid-template-columns: 4.7rem minmax(0, 1fr) 4.2rem;
  grid-template-rows: minmax(0, 1fr);
  gap: .25rem;
  width: 100%;
  max-width: none;
  margin: 0;
  padding: .36rem .35rem 1.5rem .35rem;
  align-items: stretch;
}
.lobby-body.is-home .lobby-left { height: 100%; min-height: 0; }
.lobby-body.is-home .lobby-hub-right { height: auto; min-height: 0; align-self: start; }
.lobby-body.is-home .lobby-scene,
.lobby-body.is-home .lobby-right { display: none; }
.lobby-body.is-home .lobby-hub-right { display: flex; }
.lobby-body.is-setup {
  grid-template-columns: minmax(0, 1fr) minmax(0, 5.9rem);
  grid-template-rows: minmax(0, 1fr);
  gap: .18rem;
  width: 100%;
  max-width: none;
  margin: 0;
  padding: .3rem .25rem .15rem .35rem;
  align-items: stretch;
}
.lobby-screen.is-setup .lobby-footer { display: none; }
.lobby-body.is-setup .lobby-left,
.lobby-body.is-setup .lobby-home { display: none; }
.lobby-body.is-setup .lobby-right { display: flex; flex-direction: column; height: 100%; min-height: 0; }
.lobby-body.is-setup .diff-list { flex: 1 1 auto; min-height: 0; }
.lobby-body.is-setup .diff-card { flex: 1 1 0; min-height: 0; }

.lobby-home {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 7rem;
  padding: .3rem .2rem 1.2rem;
  pointer-events: none;
}

/* ---- hub rails: key join / friends / lobby chat on the left, recruiting + tools on the right ------------ */
.lobby-hub-right { display: none; flex-direction: column; gap: .12rem; height: 100%; min-height: 0; }
.lobby-hub-right .lobby-rooms { flex: none; }
.lobby-hub-right .section-label {
  padding: .075rem .1rem;
  background: linear-gradient(90deg, rgba(246, 163, 41, .2), rgba(246, 163, 41, .03) 65%, transparent);
  border-left: 2px solid var(--amber);
  color: var(--amber-2);
  font-size: calc(.2 * var(--t));
  letter-spacing: .04em;
}
.lobby-hub-right .section-label__idx { color: var(--amber); }
.lobby-hub-right .lobby-room-list { flex: none; max-height: 3.05rem; overflow-y: auto; gap: .07rem; }
.lobby-hub-right .lobby-rooms__empty { flex: none; min-height: 1.25rem; }
.lobby-hub-right .lroom { padding: .075rem .09rem; gap: .02rem; border-left: 2px solid rgba(246, 163, 41, .55); }
.lobby-hub-right .lroom:hover { border-color: var(--amber); background: rgba(40, 33, 18, .4); }
.lobby-hub-right .lroom__note { display: none; }
.lobby-hub-right .lroom__head { gap: .05rem; }
.lobby-hub-right .lroom__host { font-size: calc(.15 * var(--t)); }
.lobby-hub-right .lroom__meta { font-size: calc(.1 * var(--t)); }
.lobby-hub-right .lroom__foot { margin-top: .015rem; }
.lobby-hub-right .lroom__foot .btn { height: .32rem; font-size: calc(.11 * var(--t)); }
.hub-left { display: flex; flex-direction: column; gap: .1rem; height: 100%; min-height: 0; }
.hub-action {
  display: flex;
  align-items: center;
  gap: .12rem;
  min-height: .68rem;
  padding: .1rem .14rem;
  border: 1px solid rgba(78, 216, 175, .18);
  background: linear-gradient(135deg, rgba(18, 29, 25, .9), rgba(5, 9, 8, .94));
  color: var(--text-hi);
  text-align: left;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - .1rem), calc(100% - .1rem) 100%, 0 100%);
}
.hub-action:hover { border-color: var(--mint-500); background: rgba(24, 49, 40, .9); }
.hub-action__icon {
  display: grid;
  place-items: center;
  width: .38rem;
  height: .38rem;
  border: 1px solid rgba(78, 216, 175, .4);
  background: rgba(78, 216, 175, .07);
  color: var(--mint-400);
}
.hub-action__icon .icon { width: .22rem; height: .22rem; }
.hub-action b { display: block; font-size: calc(.19 * var(--t)); letter-spacing: .06em; }
.hub-action small { display: block; color: var(--text-dim); font-family: var(--font-num); font-size: calc(.09 * var(--t)); letter-spacing: .08em; }
.lobby-chat {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  min-height: 0;
  border: 1px solid rgba(78, 216, 175, .2);
  background: rgba(5, 10, 8, .78);
  backdrop-filter: blur(4px);
}
.lobby-chat.is-collapsed { flex: 0 0 auto; }
.lobby-chat__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .08rem;
  padding: .08rem .1rem;
  border-bottom: 1px solid rgba(78, 216, 175, .14);
  color: var(--mint-400);
  font-size: calc(.14 * var(--t));
  font-weight: 700;
}
.lobby-chat__head small { color: var(--text-dim); font-family: var(--font-num); font-size: calc(.08 * var(--t)); letter-spacing: .1em; }
.lobby-chat__actions { display: flex; align-items: center; gap: .06rem; }
.lobby-chat__actions button { border: 0; background: none; color: var(--text-lo); font-size: calc(.11 * var(--t)); }
.lobby-chat__recruit-link { display: none; color: var(--amber-2) !important; border: 1px solid rgba(246, 163, 41, .3) !important; padding: .01rem .05rem; }
.lobby-chat__recruit-link:hover { background: rgba(246, 163, 41, .1); }
.lobby-recruit__box { width: min(6rem, calc(100vw - .8rem)); max-height: calc(100vh - .8rem); overflow: auto; padding: .12rem; }
.lobby-recruit__box .lobby-rooms { display: flex; flex-direction: column; }
.lobby-recruit__box .section-label { padding-right: .34rem; }
.lobby-recruit__box .lobby-room-list { grid-template-columns: 1fr; max-height: none; }
.lobby-recruit__close { position: absolute; top: .08rem; right: .08rem; z-index: 2; border: 0; background: none; color: var(--text-lo); padding: .03rem; }
.lobby-recruit__close:hover { color: #fff; }
.lobby-recruit__close .icon { width: .2rem; height: .2rem; }
.lobby-chat__body { flex: 1 1 auto; min-height: 0; overflow-y: auto; padding: .08rem .1rem; }
.lobby-chat__line { padding: .045rem 0; border-bottom: 1px solid rgba(255, 255, 255, .04); }
.lobby-chat__line b { color: var(--mint-400); font-size: calc(.13 * var(--t)); }
.lobby-chat__line time { float: right; color: var(--text-dim); font-family: var(--font-num); font-size: calc(.1 * var(--t)); }
.lobby-chat__line p { margin: .015rem 0 0; color: var(--text-md); font-size: calc(.13 * var(--t)); line-height: 1.45; word-break: break-word; }
.lobby-chat__recruit {
  margin: .06rem 0;
  padding: .08rem .09rem .07rem;
  border: 1px solid rgba(246, 163, 41, .3);
  border-left: 2px solid var(--amber);
  background: linear-gradient(135deg, rgba(45, 34, 16, .55), rgba(8, 12, 10, .4));
}
.lobby-chat__recruit-head { display: flex; align-items: center; justify-content: space-between; gap: .08rem; }
.lobby-chat__recruit-head b { color: var(--amber-2); font-size: calc(.13 * var(--t)); }
.lobby-chat__recruit-head time { color: var(--text-dim); font-family: var(--font-num); font-size: calc(.1 * var(--t)); }
.lobby-chat__recruit p { margin: .04rem 0; color: var(--text-md); font-size: calc(.12 * var(--t)); }
.lobby-chat__recruit p .num { color: var(--gold-2); }
.lobby-chat__recruit small { display: block; margin-bottom: .04rem; color: var(--text-dim); font-size: calc(.1 * var(--t)); }
.lobby-chat__recruit button {
  width: 100%;
  height: .34rem;
  border: 1px solid rgba(246, 163, 41, .45);
  background: rgba(246, 163, 41, .1);
  color: var(--amber-2);
  font-size: calc(.12 * var(--t));
}
.lobby-chat__recruit button:hover { background: rgba(246, 163, 41, .2); }
.lobby-chat__empty { display: grid; place-items: center; height: 100%; min-height: 1rem; color: var(--text-dim); font-size: calc(.13 * var(--t)); text-align: center; }
.lobby-chat__form { display: flex; gap: .05rem; padding: .07rem; border-top: 1px solid rgba(78, 216, 175, .14); }
.lobby-chat__form input {
  flex: 1 1 auto;
  min-width: 0;
  height: .36rem;
  padding: 0 .08rem;
  border: 1px solid var(--line-2);
  background: rgba(0, 0, 0, .35);
  color: var(--text-hi);
  font-size: calc(.13 * var(--t));
}
.lobby-chat__form button {
  flex: none;
  padding: 0 .12rem;
  border: 1px solid rgba(78, 216, 175, .4);
  background: rgba(78, 216, 175, .12);
  color: var(--mint-300);
  font-size: calc(.13 * var(--t));
}
.lobby-chat__form button:disabled { opacity: .4; }
.lobby-hub-right .lobby-rooms { display: flex; flex-direction: column; flex: none; min-height: 0; }
.lobby-hub-right .lobby-room-list { flex: none; min-height: 0; max-height: none; overflow: visible; }
.lobby-hub-right .lobby-room-list.is-all { max-height: 5rem; overflow-y: auto; }
.lobby-hub-right .lobby-rooms__empty { flex: none; }
.hub-links { display: flex; flex-direction: column; gap: .08rem; flex: none; }
.hub-link {
  display: flex;
  align-items: center;
  gap: .1rem;
  min-height: .55rem;
  padding: .08rem .12rem;
  border: 1px solid rgba(78, 216, 175, .2);
  background: rgba(6, 11, 9, .82);
  color: var(--text-hi);
  text-align: left;
}
.hub-link:hover { border-color: var(--mint-500); }
.hub-link .icon { width: .24rem; height: .24rem; color: var(--mint-400); }
.hub-link b { font-size: calc(.15 * var(--t)); }
.hub-link small { margin-left: .06rem; color: var(--text-dim); font-size: calc(.1 * var(--t)); }
.hub-link--loadout { width: 100%; justify-content: flex-start; }
.lobby-friends__box { width: min(5.4rem, calc(100vw - .8rem)); }
.lobby-friends { display: flex; flex-direction: column; gap: .05rem; max-height: 5.2rem; overflow-y: auto; }
.lobby-friend { display: flex; align-items: center; gap: .08rem; padding: .08rem .1rem; border: 1px solid var(--line); background: rgba(255, 255, 255, .018); }
.lobby-friend__dot { width: .07rem; height: .07rem; border-radius: 50%; background: var(--mint-400); box-shadow: 0 0 .1rem var(--mint-400); }
.lobby-friend b { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: calc(.15 * var(--t)); }
.lobby-friend small { color: var(--text-dim); font-size: calc(.11 * var(--t)); }
.lobby-hub-right.is-flash { animation: hub-flash .6s ease-in-out 2; }
@keyframes hub-flash { 50% { filter: brightness(1.35); } }
.lobby-home__emblem {
  position: absolute;
  left: 50%;
  top: 45%;
  width: 3.4rem;
  height: 3.4rem;
  transform: translate(-50%, -50%) rotate(45deg);
  border: 1px solid rgba(78, 216, 175, .22);
  box-shadow: 0 0 1.4rem rgba(78, 216, 175, .10), inset 0 0 .8rem rgba(78, 216, 175, .05);
}
.lobby-home__emblem::before,
.lobby-home__emblem::after {
  content: '';
  position: absolute;
  inset: .26rem;
  border: 1px solid rgba(246, 163, 41, .2);
}
.lobby-home__emblem::after { inset: .52rem; border-color: rgba(78, 216, 175, .3); }
.lobby-home__emblem i {
  position: absolute;
  left: 50%; top: 50%;
  width: .5rem; height: .5rem;
  transform: translate(-50%, -50%);
  background: var(--mint-500);
  clip-path: polygon(25% 0, 75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%);
  box-shadow: 0 0 .3rem rgba(78, 216, 175, .7);
}
.lobby-home__hero { position: relative; text-align: center; }
.lobby-home__brand { position: relative; display: flex; flex-direction: column; align-items: center; text-align: center; }
.lobby-home__brand .emblem { margin-bottom: .08rem; }
.lobby-home__brand .title-en { margin-bottom: .02rem; }
.lobby-home__brand .title-cn { margin: .02rem 0 .05rem; }
.lobby-home__eyebrow { color: var(--mint-500); font-size: calc(.14 * var(--t)); letter-spacing: .32em; }
.lobby-home__eyebrow i { color: var(--amber); font-style: normal; }
.lobby-home__hero h2 {
  margin: .06rem 0 .08rem;
  color: #f4f8f6;
  font-size: calc(.78 * var(--t));
  font-weight: 900;
  letter-spacing: .16em;
  text-shadow: 0 0 .4rem rgba(23, 249, 183, .26);
}
.lobby-home__hero p {
  max-width: 6.4rem;
  margin: 0 auto;
  color: var(--text-md);
  font-size: calc(.17 * var(--t));
  line-height: 1.7;
}
.lobby-home__stats {
  position: absolute;
  left: 50%;
  bottom: .2rem;
  transform: translateX(-50%);
  display: flex;
  gap: .32rem;
  color: var(--text-dim);
  font-family: var(--font-num);
  font-size: calc(.12 * var(--t));
  letter-spacing: .08em;
  white-space: nowrap;
}
.lobby-home__stats b { color: var(--mint-400); font-size: calc(.16 * var(--t)); margin-left: .05rem; }

.lobby-mode-dock {
  position: absolute;
  right: .55rem;
  bottom: .48rem;
  z-index: 6;
  display: flex;
  gap: .1rem;
}
.lobby-mode-btn {
  --mode-accent: var(--mint-400);
  position: relative;
  display: grid;
  grid-template-columns: auto auto;
  grid-template-rows: auto auto;
  align-items: center;
  column-gap: .1rem;
  min-width: 2.05rem;
  height: .86rem;
  padding: .1rem .2rem .1rem .14rem;
  overflow: hidden;
  text-align: left;
  border: 1px solid color-mix(in srgb, var(--mode-accent) 46%, #26332d);
  background: linear-gradient(135deg, rgba(17, 27, 23, .94), rgba(5, 9, 8, .97));
  color: var(--text-hi);
  clip-path: polygon(0 .12rem, .12rem 0, 100% 0, 100% calc(100% - .12rem), calc(100% - .12rem) 100%, 0 100%);
  backdrop-filter: blur(5px);
  box-shadow: 0 0 .24rem rgba(0, 0, 0, .35), inset 0 0 .3rem color-mix(in srgb, var(--mode-accent) 7%, transparent);
  transition: border-color var(--t-fast), background var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast);
}
.lobby-mode-btn::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: .035rem;
  background: var(--mode-accent);
  box-shadow: 0 0 .14rem var(--mode-accent);
}
.lobby-mode-btn::after {
  content: '›';
  position: absolute;
  right: .08rem;
  bottom: .03rem;
  color: color-mix(in srgb, var(--mode-accent) 65%, transparent);
  font-size: calc(.2 * var(--t));
  line-height: 1;
}
.lobby-mode-btn .icon {
  grid-row: 1 / span 2;
  width: .36rem;
  height: .36rem;
  padding: .055rem;
  border: 1px solid color-mix(in srgb, var(--mode-accent) 48%, transparent);
  background: color-mix(in srgb, var(--mode-accent) 9%, transparent);
  color: var(--mode-accent);
}
.lobby-mode-btn span { font-size: calc(.2 * var(--t)); font-weight: 800; letter-spacing: .05em; white-space: nowrap; }
.lobby-mode-btn small { color: var(--text-dim); font-family: var(--font-num); font-size: calc(.09 * var(--t)); letter-spacing: .08em; white-space: nowrap; }
.lobby-mode-btn:hover { transform: translateY(-2px); border-color: var(--mode-accent); box-shadow: 0 0 .3rem color-mix(in srgb, var(--mode-accent) 22%, transparent); }
.lobby-mode-btn.is-join { --mode-accent: var(--amber); }
.lobby-mode-btn.is-solo { --mode-accent: var(--mint-400); }
.lobby-mode-btn.is-coop {
  --mode-accent: var(--gold);
  border-color: #ffe3a0;
  background: linear-gradient(100deg, #ffdd73, #f2a92f 55%, #ffd45c);
  color: #1a0d02;
  box-shadow: 0 0 .34rem rgba(246, 163, 41, .25), inset 0 0 0 1px rgba(255, 255, 255, .2);
}
.lobby-mode-btn.is-coop .icon { color: #1a0d02; border-color: rgba(26, 13, 2, .28); background: rgba(255, 255, 255, .18); }
.lobby-mode-btn.is-coop small { color: rgba(26, 13, 2, .62); }
.lobby-mode-btn.is-coop::after { color: rgba(26, 13, 2, .45); }
.lobby-mode-btn.is-fire { --mode-accent: #ff8a5c; opacity: .55; cursor: not-allowed; }
.lobby-mode-btn.is-find { --mode-accent: #69d7ff; }
.lobby-setup-back {
  position: absolute;
  left: .1rem;
  top: .05rem;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: .05rem;
  padding: .05rem .1rem;
  border: 1px solid var(--line-2);
  background: rgba(5, 9, 8, .7);
  color: var(--text-md);
  font-size: calc(.14 * var(--t));
  pointer-events: auto;
}
.lobby-setup-back:hover { border-color: var(--mint-500); color: var(--mint-300); }
.lobby-setup-back .icon { width: .16rem; height: .16rem; }
.lobby-setup-back--inline { display: none; position: static; margin-bottom: .08rem; }

/* ---- join is a separate overlay, opened only by the 加入同盟 dock action ------------------------- */
.lobby-join-layer {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
}
.lobby-join__back {
  position: absolute;
  inset: 0;
  border: 0;
  background: rgba(0, 0, 0, .58);
  backdrop-filter: blur(3px);
}
.lobby-join__box {
  position: relative;
  z-index: 1;
  width: min(6.8rem, calc(100vw - .8rem));
  padding: .16rem;
  background: linear-gradient(145deg, rgba(19, 29, 25, .98), rgba(5, 9, 8, .99));
  border: 1px solid rgba(246, 163, 41, .36);
  clip-path: polygon(0 .16rem, .16rem 0, 100% 0, 100% calc(100% - .16rem), calc(100% - .16rem) 100%, 0 100%);
  box-shadow: 0 .24rem .7rem rgba(0, 0, 0, .6), 0 0 .4rem rgba(246, 163, 41, .1);
}
.lobby-join__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .2rem;
  margin-bottom: .1rem;
  padding-left: .1rem;
  border-left: 2px solid var(--amber);
  color: var(--text-hi);
  font-size: calc(.2 * var(--t));
  font-weight: 700;
}
.lobby-join__head span { display: flex; align-items: baseline; gap: .08rem; }
.lobby-join__head b { color: var(--amber); font-family: var(--font-num); font-size: calc(.14 * var(--t)); }
.lobby-join__head button { border: 0; background: none; color: var(--text-lo); padding: .02rem; }
.lobby-join__head button:hover { color: #fff; }
.lobby-join__head .icon { width: .2rem; height: .2rem; }
.lobby-join__box .join-panel { border: 0; background: transparent; }
.lobby-join__box .join-panel .panel__body { padding: .08rem 0 0; gap: .12rem; }
.lobby-join__box .join-row { display: flex; flex-wrap: wrap; gap: .1rem; }
.lobby-join__box .join-row .field { flex: 1 1 100%; }
.lobby-join__box .join-row .btn { flex: 1 1 0; height: .58rem; }
.lobby-join__box .join-foot { font-size: calc(.13 * var(--t)); }

@media (max-width: 1100px) {
  .lobby-top-achievement, .lobby-sweep, .lobby-loadout { display: none; }
  .topbar__left .online-stats { display: none; }
  .lobby-body.is-setup { grid-template-columns: 1fr; }
  .lobby-body.is-setup .lobby-scene { display: none; }
  .lobby-setup-back--inline { display: inline-flex; align-self: flex-start; position: static; }
  .lobby-mode-dock { bottom: .55rem; right: .3rem; }
  .lobby-mode-btn { min-width: 1.75rem; height: .76rem; }
}
@media (max-width: 780px) {
  .lobby-body.is-home { grid-template-columns: 4.4rem minmax(0, 1fr); }
  .lobby-body.is-home .lobby-hub-right { display: none; }
  .lobby-chat__recruit-link { display: inline-flex; }
}
@media (max-width: 900px) {
  .topbar__center { display: none; }
  .lobby-body.is-setup { grid-template-columns: 1fr; }
  .lobby-body.is-setup .lobby-scene { display: none; }
  .lobby-setup-back--inline { display: inline-flex; align-self: flex-start; position: static; }
  .lobby-toolbar { gap: .05rem; }
  .lobby-toolbar .btn--square.btn--sm { --sq: max(.5rem, 36px); }
  .lobby-toolbar__fs { width: max(.5rem, 36px); height: max(.5rem, 36px); }
  .lobby-toolbar .btn--square.btn--sm .icon, .lobby-toolbar__fs .icon { width: 18px; height: 18px; }
}
@media (max-width: 720px) {
  .lobby-body.is-home,
  .lobby-body.is-setup { grid-template-columns: 1fr; }
  .lobby-body.is-setup .lobby-scene { display: none; }
  .lobby-setup-back--inline { display: inline-flex; align-self: flex-start; position: static; }
  .lobby-home { min-height: 5.2rem; }
  .lobby-home__hero h2 { font-size: calc(.5 * var(--t)); }
  .lobby-mode-dock { left: .3rem; right: .3rem; bottom: .55rem; }
  .lobby-mode-btn { flex: 1; min-width: 0; }
}

/* Lobby player profile editor + distributed name styling. */
.pname { display: inline-block; max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pname--glow { text-shadow: 0 0 .08rem currentColor, 0 0 .18rem rgba(120, 255, 220, .45); }
.pname--rainbow { background-size: 200% 100% !important; animation: pname-rainbow 5s linear infinite; }
.pname--pulse { animation: pname-pulse 2.2s ease-in-out infinite; }
@keyframes pname-rainbow { to { background-position: 200% 0; } }
@keyframes pname-pulse { 0%, 100% { filter: brightness(1); } 50% { filter: brightness(1.5) drop-shadow(0 0 .06rem currentColor); } }
.profilemodal { position: fixed; inset: 0; z-index: 140; display: grid; place-items: center; padding: .3rem;
  background: rgba(2, 7, 6, .66); -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px); }
.profilemodal__box { width: min(6.2rem, 94vw); max-height: 90vh; overflow-y: auto; background: linear-gradient(180deg, rgba(15, 30, 27, .99), rgba(6, 14, 12, .99));
  border: 1px solid rgba(78, 216, 175, .35); box-shadow: 0 0 .4rem rgba(0, 0, 0, .55); }
.profilemodal__head { display: flex; align-items: flex-start; justify-content: space-between; padding: .16rem .18rem .1rem; border-bottom: 1px solid rgba(78, 216, 175, .17); }
.profilemodal__micro { color: var(--mint-400); font-size: max(.1rem, 8px); letter-spacing: .16em; }
.profilemodal__head h2 { margin: .03rem 0 0; color: var(--text-hi); font-size: calc(.24 * var(--t)); }
.profilemodal__x { width: .26rem; height: .26rem; display: grid; place-items: center; border: 0; background: transparent; color: var(--text-lo); cursor: pointer; }
.profilemodal__x:hover { color: var(--mint-300); }
.profilemodal__body { padding: .14rem .18rem; display: flex; flex-direction: column; gap: .14rem; }
.profilemodal__preview { display: flex; align-items: center; gap: .16rem; padding: .1rem; background: rgba(255, 255, 255, .03); border: 1px solid var(--line); }
.profilemodal__who { display: flex; flex-direction: column; gap: .04rem; min-width: 0; }
.profilemodal__name { font-size: calc(.24 * var(--t)); font-weight: 700; }
.profilemodal__hint { color: var(--text-lo); font-size: calc(.11 * var(--t)); }
.profilemodal__field { display: flex; flex-direction: column; gap: .06rem; color: var(--text-md); font-size: calc(.13 * var(--t)); }
.profilemodal__field > span { color: var(--text-lo); font-size: calc(.11 * var(--t)); letter-spacing: .06em; }
.profilemodal__field input[type=text] { height: max(.62rem, 37px); padding: 0 .1rem; color: var(--text-hi); background: rgba(0, 0, 0, .35); border: 1px solid var(--line-2); outline: none; font: inherit; }
.profilemodal__field input[type=text]:focus { border-color: var(--mint-500); }
.profilemodal__avatar-row { display: flex; align-items: center; flex-wrap: wrap; gap: .08rem; }
.profilemodal__upload { display: inline-flex; align-items: center; gap: .05rem; padding: .05rem .09rem; color: var(--mint-300); border: 1px solid rgba(78, 216, 175, .4); cursor: pointer; font-size: calc(.12 * var(--t)); }
.profilemodal__upload:hover { background: rgba(78, 216, 175, .1); }
.profilemodal__upload input { display: none; }
.profilemodal__upload .icon { width: .2rem; height: .2rem; }
.profilemodal__clear { padding: .04rem .07rem; color: var(--text-lo); background: transparent; border: 1px solid var(--line-2); cursor: pointer; font-size: calc(.11 * var(--t)); }
.profilemodal__avatar-row small { color: var(--text-dim); font-size: calc(.1 * var(--t)); }
.profilemodal__colors { display: flex; align-items: center; flex-wrap: wrap; gap: .08rem; }
.profilemodal__colors input[type=color] { width: .42rem; height: .3rem; padding: 0; background: transparent; border: 1px solid var(--line-2); cursor: pointer; }
.profilemodal__colors select { height: .3rem; padding: 0 .06rem; color: var(--text-hi); background: rgba(0, 0, 0, .35); border: 1px solid var(--line-2); font: inherit; }
.profilemodal__check { display: inline-flex; align-items: center; gap: .04rem; color: var(--text-md); font-size: calc(.12 * var(--t)); }
.profilemodal__err { margin: 0; color: var(--red-premium); font-size: calc(.12 * var(--t)); }
.profilemodal__foot { display: flex; justify-content: flex-end; gap: .08rem; padding: .1rem .18rem .16rem; border-top: 1px solid rgba(78, 216, 175, .17); }
@media (max-width: 760px) { .profilemodal__box { width: 96vw; } }

.me-profile { display: inline-flex; align-items: center; gap: .04rem; height: max(.58rem, 34px); padding: 0 .09rem; color: var(--mint-300);
  background: rgba(8, 20, 17, .8); border: 1px solid rgba(78, 216, 175, .28); cursor: pointer; font-size: max(.12rem, 9px); }
.me-profile:hover { background: rgba(78, 216, 175, .12); border-color: var(--mint-500); }
.me-profile .icon { width: .2rem; height: .2rem; }

/* Avatar crop step (profile editor): drag to pan, slider to zoom, square output. */
.profilecrop { position: fixed; inset: 0; z-index: 160; display: grid; place-items: center; padding: .3rem;
  background: rgba(2, 7, 6, .78); -webkit-backdrop-filter: blur(5px); backdrop-filter: blur(5px); }
.profilecrop__box { width: min(5.4rem, 92vw); padding: .16rem; background: linear-gradient(180deg, rgba(15, 30, 27, .99), rgba(6, 14, 12, .99));
  border: 1px solid rgba(78, 216, 175, .4); box-shadow: 0 0 .4rem rgba(0, 0, 0, .6); }
.profilecrop__box header { display: flex; flex-direction: column; gap: .03rem; margin-bottom: .1rem; }
.profilecrop__box header b { color: var(--text-hi); font-size: calc(.2 * var(--t)); }
.profilecrop__box header small { color: var(--text-lo); font-size: calc(.11 * var(--t)); }
.profilecrop__stage { position: relative; width: 240px; height: 240px; margin: 0 auto; overflow: hidden; cursor: grab;
  background: #06100d; border: 1px solid rgba(78, 216, 175, .35); touch-action: none; }
.profilecrop__stage:active { cursor: grabbing; }
.profilecrop__stage img { position: absolute; max-width: none; pointer-events: none; user-select: none; }
.profilecrop__ring { position: absolute; inset: 0; pointer-events: none; box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .65);
  border-radius: .02rem; }
.profilecrop__zoom { display: flex; align-items: center; gap: .08rem; margin: .12rem 0; color: var(--text-lo); font-size: calc(.12 * var(--t)); }
.profilecrop__zoom input { flex: 1; accent-color: var(--mint-400); }
.profilecrop__box footer { display: flex; justify-content: flex-end; gap: .08rem; }


.profilemodal__cardpreview { width: 100%; aspect-ratio: 3 / 1; display: flex; align-items: flex-end; padding: .08rem .12rem;
  margin-top: .06rem; overflow: hidden; background-size: cover; background-position: center; border: 1px solid var(--line-2);
  color: #fff; text-shadow: 0 1px 3px #000; }
.profilecrop__box { width: min(7.4rem, 94vw); }
.me-chip.has-card { background-image: linear-gradient(90deg, rgba(4, 14, 11, .94), rgba(4, 14, 11, .58)), var(--card); background-size: cover; background-position: center; }