/* ==========================================================================================
   screens/lobby.css — mode cards (独立/同盟), difficulty cards, create button, join panel.
   ========================================================================================== */

.lobby-body {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: .28rem;
  width: 100%;
  max-width: 19.2rem;
  margin: 0 auto;
  padding: .16rem .5rem .18rem;
  align-content: start;
}
.lobby-left, .lobby-right { display: flex; flex-direction: column; min-width: 0; }
.lobby-contact { display: flex; justify-content: flex-end; width: 100%; max-width: 19.2rem; margin-inline: auto; padding: 0 max(.5rem, 16px); flex: none; }
.lobby-feedback { min-height: 40px; padding-inline: 14px; font-size: max(calc(.19 * var(--t)), 14px); color: var(--mint-400); border-color: var(--mint-700); letter-spacing: .06em; }
.lobby-feedback .icon { width: 16px; height: 16px; }

/* ---- mode cards ------------------------------------------------------------------------------------ */
.mode-cards { display: grid; grid-template-columns: 1fr 1fr; gap: .16rem; margin-bottom: .14rem; }
.mode-card {
  --bk-c: transparent;
  --bk-l: .2rem;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .1rem;
  min-height: 2.65rem;
  padding: .18rem .22rem;
  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: .62rem;
  height: .62rem;
  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(.36 * 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: .1rem;
  padding: .08rem .16rem;
  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: '·'; margin-right: .05rem; color: var(--d-color); font-weight: 900; }
/* battlefield pool note (config.json modes[].stages): 战场固定为 战场#01 / 战场随机（共N张） — the last item of the
   effects row (no extra card height: the lobby must not scroll at 1280×720 / 1920×1080) */
.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 .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); }

/* Lobby-only chrome and optional readers; no changes to the game/room scale. */
.lobby-screen .topbar { grid-template-columns: auto minmax(0, 1fr) auto; gap: .16rem; padding-inline: .32rem; height: auto; min-height: 1.1rem; padding-block: .12rem; }
.lobby-screen .topbar__center { min-width: 0; }
.lobby-screen .topbar__title { font-size: max(calc(.25 * var(--t)), 14px); letter-spacing: .06em; text-wrap: balance; }
.lobby-screen .topbar__right { gap: .1rem; flex-wrap: wrap; }
.lobby-tools { position: relative; }
.lobby-tools > summary { display: flex; align-items: center; justify-content: center; gap: 6px; min-height: 40px; padding: 6px 10px; border: 1px solid var(--line-2); color: var(--text-md); background: var(--bg-1); cursor: pointer; font-size: max(calc(.16 * var(--t)), 12px); list-style: none; }
.lobby-tools > summary::-webkit-details-marker { display: none; }
.lobby-tools > summary .icon { width: 16px; height: 16px; }
.lobby-tools__menu { position: absolute; right: 0; top: calc(100% + 6px); z-index: 20; display: flex; flex-direction: column; gap: 6px; width: 180px; padding: 8px; background: var(--bg-1); border: 1px solid var(--line-2); box-shadow: 0 6px 20px rgba(0, 0, 0, .4); }
.lobby-tools__menu .btn, .lobby-tools__menu .fsbtn { width: 100%; min-height: 44px; justify-content: flex-start; font-size: 14px; }
.lobby-tools:not([open]) .lobby-tools__menu { display: none; }
.lobby-screen .me-chip__name { max-width: 1.5rem; }
.lobby-screen .join-row .field { min-width: 0; }
.lobby-protocol-help { margin-left: auto; height: .36rem; font-size: calc(.14 * var(--t)); }
.lobby-screen .matchmaking--compact { margin-top: .14rem; padding: .14rem .2rem; }
.lobby-screen .matchmaking__actions { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: .1rem; margin-bottom: 0; }
.lobby-screen .matchmaking.is-offered .matchmaking__actions { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.lobby-screen .matchmaking__help { font-size: calc(.15 * var(--t)); }
.lobby-screen .matchmaking__revival { margin-block: .1rem; display: flex; align-items: baseline; flex-wrap: wrap; gap: .04rem .1rem; }
.lobby-screen .matchmaking__revival p { margin: 0; }
.lobby-screen .matchmaking__revival > span { flex-basis: 100%; }
.lobby-screen .matchmaking__count { margin-left: auto; font-size: calc(.15 * var(--t)); color: var(--text-lo); font-weight: 400; }
.lobby-screen .matchmaking h2 { display: flex; flex-wrap: wrap; align-items: baseline; gap: .08rem; }
.lobby-screen .matchmaking--compact:not(.is-active) > header,
.lobby-screen .matchmaking--compact:not(.is-active) > h2 { display: none; }

.lobby-screen .modal {
  height: calc(var(--sp-vh, 1vh) * 100);
  padding: calc(16px + var(--sa-t, 0px)) calc(16px + var(--sa-r, 0px)) calc(16px + var(--sa-b, 0px)) calc(16px + var(--sa-l, 0px));
}
.lobby-dialog {
  width: min(10rem, calc(100vw - var(--sa-l, 0px) - var(--sa-r, 0px) - 32px));
  max-height: calc(var(--sp-vh, 1vh) * 100 - var(--sa-t, 0px) - var(--sa-b, 0px) - 32px);
  min-height: 0;
}
.lobby-dialog .modal__head { flex: none; }
.lobby-dialog .modal__body { min-height: 0; overscroll-behavior: contain; }
.lobby-dialog .modal__title { font-size: max(calc(.26 * var(--t)), 18px); }
.lobby-dialog .modal__text, .lobby-protocol-text { font-size: max(calc(.18 * var(--t)), 14px); line-height: 1.65; }
.lobby-dialog .modal__text + .modal__text { margin-top: .16rem; }
.lobby-protocol-text { display: flex; flex-direction: column; gap: .12rem; }
.lobby-protocol-text ul { padding-left: 1.4em; }
.announcement-list { display: flex; flex-direction: column; gap: .24rem; }
.announcement-entry { overflow-wrap: anywhere; }
.announcement-entry + .announcement-entry { border-top: 1px solid var(--line); padding-top: .22rem; }
.announcement-entry header { display: flex; flex-wrap: wrap; align-items: baseline; gap: .1rem .2rem; margin-bottom: .12rem; }
.announcement-entry h3 { font-size: max(calc(.23 * var(--t)), 16px); color: var(--text-hi); }
.announcement-date { font-size: max(calc(.14 * var(--t)), 12px); color: var(--text-lo); }
.announcement-entry p { white-space: pre-wrap; font-size: max(calc(.18 * var(--t)), 14px); line-height: 1.7; }
.announcement-entry p + p { margin-top: .12rem; }
.announcement-state { display: flex; flex-direction: column; align-items: center; gap: .14rem; padding-block: .36rem; text-align: center; }
.announcement-state > .icon { width: .4rem; height: .4rem; color: var(--mint-400); }
.announcement-state h3 { color: var(--text-hi); font-size: max(calc(.22 * var(--t)), 16px); }
.announcement-state p { font-size: max(calc(.17 * var(--t)), 14px); line-height: 1.6; }
.announcement-board .modal__body { display: flex; flex-direction: column; flex: 1; gap: 12px; overflow: hidden; }
.announcement-scroll { min-height: 0; flex: 1; overflow-y: scroll; overscroll-behavior: contain; scrollbar-gutter: stable; padding-right: 12px; touch-action: pan-y; -webkit-overflow-scrolling: touch; }
.announcement-scroll::-webkit-scrollbar { width: 8px; }.announcement-scroll::-webkit-scrollbar-track { background: var(--bg-3); }.announcement-scroll::-webkit-scrollbar-thumb { background: var(--mint-700); border: 2px solid var(--bg-3); border-radius: 4px; }
.announcement-reading { flex: none; display: flex; flex-direction: column; gap: 7px; padding-top: 8px; border-top: 1px solid var(--line); color: var(--text-lo); font-size: 12px; }
.announcement-reading__track { height: 3px; background: var(--bg-4); overflow: hidden; }.announcement-reading__track i { display: block; width: 100%; height: 100%; background: var(--mint-500); transform-origin: left; }
.announcement-reading > span { display: flex; align-items: center; justify-content: center; gap: 6px; }.announcement-reading .icon { width: 14px; height: 14px; transform: rotate(90deg); }
.announcement-reading.has-more { color: var(--mint-400); }
.lobby-fullscreen { min-width: 40px; min-height: 40px; width: max(.4rem, 40px); height: max(.4rem, 40px); }
.fullscreen-help { width: min(max(5.4rem, 320px), calc(100vw - 32px)); }.fullscreen-help p { font-size: max(calc(.17 * var(--t)), 14px); line-height: 1.65; }.fullscreen-help p + p { margin-top: 12px; }
.announcement-board .modal__actions .btn, .server-status-modal .modal__actions .btn, .fullscreen-help .modal__actions .btn { min-height: 40px; font-size: max(calc(.17 * var(--t)), 14px); padding-inline: 16px; }
.lobby-fullscreen .icon { width: 20px; height: 20px; }
@media (max-width: 400px) { .lobby-screen .topbar__left .online-players { display: none; } .lobby-screen .topbar__right { gap: 4px; } }

@media (max-width: 1100px) {
  .lobby-screen .topbar { grid-template-columns: auto minmax(0, 1fr); gap: .16rem; }
  .lobby-screen .topbar__center, .lobby-screen .me-chip__text { display: none; }
  .lobby-screen .me-chip { padding: .04rem; border: 0; background: none; }
  .lobby-screen .topbar__title { font-size: max(calc(.25 * var(--t)), 14px); }
  .lobby-screen .topbar .btn { font-size: max(calc(.16 * var(--t)), 12px); min-height: 40px; padding-inline: max(.14rem, 8px); }
  .lobby-screen .online-players, .lobby-screen .ping { font-size: 12px; }
}
@media (max-width: 767px) {
  .lobby-screen .topbar { height: 48px; padding-inline: 16px; grid-template-columns: auto auto; justify-content: space-between; }
  .lobby-screen .topbar__center, .lobby-screen .me-chip { display: none; }
  .lobby-screen .topbar__left, .lobby-screen .topbar__right { gap: 6px; }
  .lobby-screen .topbar .btn { padding-inline: 8px; font-size: 12px; min-height: 40px; }
  .lobby-screen .online-players { font-size: 12px; }
}
@media (max-width: 600px) and (min-height: 461px) {
  .lobby-screen .topbar { height: auto; min-height: 96px; grid-template-columns: minmax(0, 1fr); gap: 4px; padding-block: 4px; }
  .lobby-screen .topbar__left, .lobby-screen .topbar__right { justify-content: space-between; }
  .lobby-body { grid-template-columns: minmax(0, 1fr); padding: 8px 16px 16px; gap: 16px; }
  .lobby-screen .section-label { font-size: 13px; min-height: 24px; margin-bottom: 8px; }
  .lobby-screen .section-label > .micro { display: none; }
  .lobby-protocol-help { height: 32px; min-height: 32px; font-size: 12px; padding-inline: 8px; }
  .mode-cards { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; margin-bottom: 12px; }
  .lobby-screen .mode-card, .lobby-screen .mode-card--match { min-height: 76px; padding: 8px 4px; flex-direction: column; gap: 6px; align-items: center; justify-content: center; grid-column: auto; }
  .lobby-screen .mode-card__icon { width: 24px; height: 24px; }
  .lobby-screen .mode-card__icon .icon { width: 18px; height: 18px; }
  .lobby-screen .mode-card__name { font-size: 15px; letter-spacing: .02em; }
  .lobby-screen .mode-card__text { align-items: center; }
  .lobby-screen .mode-card__text > .micro, .lobby-screen .mode-card__desc, .lobby-screen .mode-card__points, .lobby-screen .mode-card__check, .lobby-screen .diff-card__effects, .tips, .create-box__hint { display: none; }
  .lobby-screen .join-panel .panel__body { padding: 10px; gap: 6px; }
  .lobby-screen .join-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 6px; }
  .lobby-screen .join-row .field { grid-column: 1 / -1; }
  .lobby-screen .join-row .btn { height: 44px; min-height: 44px; font-size: 13px; padding-inline: 12px; }
  .lobby-screen .join-foot { font-size: 11px; line-height: 1.5; }
  .lobby-screen .diff-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px; }
  .lobby-screen .diff-card { min-height: 76px; padding: 10px; gap: 6px; }
  .lobby-screen .diff-card__head { flex-wrap: wrap; gap: 4px 6px; }
  .lobby-screen .diff-card__name { font-size: 15px; }
  .lobby-screen .diff-card__meta { width: 100%; margin: 0; font-size: 12px; }
  .lobby-screen .diff-card__meta .num { font-size: 12px; }
  .lobby-screen .diff-card__desc, .lobby-screen .diff-card__code, .lobby-screen .diff-card__check { display: none; }
  .lobby-screen .create-box { margin-top: 12px; }
  .lobby-screen .create-box .btn--xl { height: 48px; font-size: 17px; }
}