/* ==========================================================================================
   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: .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: '·'; 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__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); }

/* ---- online pill (GET /api/online, 5s poll) --------------------------------------------------------- */
.online-pill { display: inline-flex; align-items: center; gap: .06rem; height: .34rem; padding: 0 .1rem; border: 1px solid var(--line-2, #3e4b45); color: var(--text-md, #c3cbc7); font-size: calc(.14 * var(--t)); }
.online-pill .icon { width: .18rem; height: .18rem; color: var(--mint-500, #4ed8af); }
.online-pill__n { font-weight: 700; color: var(--text-hi, #f2f2f2); min-width: .2rem; text-align: right; }

/* ---- co-op create mode: direct room vs quick match pool --------------------------------------------- */
.create-box__mode { display: flex; flex-direction: column; gap: .08rem; }
/* 建立方式移入左栏后的卡片化呈现：与模式卡 / 加入同盟同一深色卡片语言 */
.lobby-create-mode {
  margin-bottom: .34rem;
  padding: .18rem .2rem .2rem;
  background: linear-gradient(180deg, rgba(28, 34, 31, .92), rgba(13, 16, 15, .94));
  border: 1px solid var(--line);
}
.lobby-create-mode .create-box__mode-label {
  display: flex;
  align-items: center;
  gap: .12rem;
  margin-bottom: .13rem;
  color: var(--text-hi, #f2f2f2);
  font-weight: 700;
  font-size: calc(.15 * var(--t));
  letter-spacing: .14em;
}
.lobby-create-mode .create-box__mode-label::before {
  content: "";
  width: .05rem;
  height: .26rem;
  background: var(--mint-500, #4ed8af);
}
.lobby-create-mode .create-box__mode-opts { gap: .12rem; }
.lobby-create-mode .create-box__mode-opt {
  padding: .14rem .16rem .13rem;
  background: rgba(8, 11, 10, .6);
  border: 1px solid var(--line-2, #3e4b45);
  transition: border-color .15s, background .15s, box-shadow .15s;
}
.lobby-create-mode .create-box__mode-opt:hover {
  border-color: var(--mint-500, #4ed8af);
  background: rgba(78, 216, 175, .06);
}
.lobby-create-mode .create-box__mode-opt.is-on {
  border-color: var(--mint-500, #4ed8af);
  background: rgba(78, 216, 175, .1);
  box-shadow: inset 0 0 0 1px rgba(78, 216, 175, .22), 0 0 .18rem rgba(78, 216, 175, .16);
}
.lobby-create-mode .create-box__mode-opt-name { font-size: calc(.16 * var(--t)); }
.lobby-create-mode .create-box__mode-opt-desc { margin-top: .03rem; line-height: 1.4; }
.create-box__mode-label { font-size: calc(.13 * var(--t)); color: var(--text-dim); letter-spacing: .1em; }
.create-box__mode-opts { display: grid; grid-template-columns: 1fr 1fr; gap: .08rem; }
.create-box__mode-opt { display: flex; flex-direction: column; gap: .02rem; align-items: flex-start; text-align: left; padding: .1rem .12rem; background: rgba(8,11,10,.6); border: 1px solid var(--line-2, #3e4b45); color: var(--text-md, #c3cbc7); cursor: pointer; transition: border-color .15s, background .15s; }
.create-box__mode-opt.is-on { border-color: var(--mint-500, #4ed8af); background: rgba(78,216,175,.08); }
.create-box__mode-opt-name { font-weight: 700; color: var(--text-hi, #f2f2f2); font-size: calc(.15 * var(--t)); }
.create-box__mode-opt-desc { font-size: calc(.12 * var(--t)); color: var(--text-lo, #8a948f); }

/* ---- quick-match queue + timeout triage ------------------------------------------------------------- */
.match-queue { display: flex; align-items: center; gap: .1rem; justify-content: center; padding: .08rem .1rem; border: 1px dashed var(--line-2, #3e4b45); }
.match-queue__count { font-size: calc(.22 * var(--t)); font-weight: 700; color: var(--mint-400, #59f4ca); }
.match-timeout__body { display: flex; flex-direction: column; align-items: center; gap: .08rem; padding: .1rem 0; }
.match-timeout__n { font-size: calc(.4rem * var(--t)); font-weight: 700; color: var(--mint-400, #59f4ca); }

/* ---- difficulty card: opening-BAN preview line ------------------------------------------------------- */
.diff-card__bans { color: var(--amber, #ffb454); font-size: calc(.12 * var(--t)); letter-spacing: .04em; opacity: .9; }

/* ===== 自定义大厅背景 ===== */
.lobby-custom-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  display: none;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  filter: blur(var(--blur, 0px));
  transform: scale(1.04); /* 模糊边缘不露底 */
}
.lobby-custom-bg.has-bg { display: block; }
.lobby-custom-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(8, 12, 16, var(--dim, 0.5));
}
/* 有自定义背景时隐藏默认深色背景 */
.app-root.has-custom-bg .app-bg { display: none; }


/* 设置弹窗 */
.bgset { display: flex; flex-direction: column; gap: .22rem; padding: .1rem 0; }
.bgset__hint { font-size: .13rem; color: #aebfc0; line-height: 1.5; }
.bgset__empty { font-size: .14rem; color: #aebfc0; padding: .3rem 0; text-align: center; }
.bgset__slider {
  display: flex; align-items: center; gap: .18rem;
  font-size: .14rem; color: #eaf2ee;
}
.bgset__slider > span { flex: none; width: .6rem; color: #eaf2ee; font-weight: 500; }
.bgset__slider input[type="range"] {
  flex: 1; height: 4px; -webkit-appearance: none; appearance: none;
  background: rgba(255,255,255,.12); border-radius: 2px; outline: none;
}
.bgset__slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--mint-500, #4ed8af); cursor: pointer;
  border: 2px solid #0b1116;
}
.bgset__slider input[type="range"]::-moz-range-thumb {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--mint-500, #4ed8af); cursor: pointer;
  border: 2px solid #0b1116;
}
.bgset__slider b { flex: none; width: .5rem; text-align: right; font-weight: 600; color: var(--mint-500, #4ed8af); }
/* ===== 有自定义背景时：面板透明度统一由 --panel-a 控制，适配任何图片 ===== */
.app-root.has-custom-bg .mode-card,
.app-root.has-custom-bg .create-box,
.app-root.has-custom-bg .lobby-create-mode {
  background: linear-gradient(180deg, rgba(28, 34, 31, var(--panel-a, .88)), rgba(13, 16, 15, calc(var(--panel-a, .88) + .02)));
}
.app-root.has-custom-bg .diff-card {
  background: linear-gradient(90deg, color-mix(in srgb, var(--d-color, #4ed8af) 12%, rgba(21, 26, 24, var(--panel-a, .88))), rgba(15, 19, 17, var(--panel-a, .88)) 70%);
}
/* Panel 通用面板：建立方式、加入同盟、作战提示 */
.app-root.has-custom-bg .panel {
  background:
    repeating-linear-gradient(0deg, rgba(255, 255, 255, .012) 0 1px, transparent 1px 3px),
    linear-gradient(180deg, rgba(30, 36, 33, var(--panel-a, .88)), rgba(18, 22, 20, var(--panel-a, .88)));
}
.app-root.has-custom-bg .tips {
  background: rgba(8, 10, 9, calc(var(--panel-a, .88) * .55));
}
/* 内部选项块 */
.app-root.has-custom-bg .create-box__mode-opt {
  background: rgba(8, 11, 10, calc(var(--panel-a, .88) * .55));
}
/* 输入框：比面板略深一点保证可读 */
.app-root.has-custom-bg .field__box {
  background: rgba(5, 7, 6, calc(var(--panel-a, .88) * .7));
}
/* ===== 有自定义背景时：文字加深色投影保证任何透明度下都清晰 ===== */
.app-root.has-custom-bg .lobby-body,
.app-root.has-custom-bg .lobby-body .mode-card,
.app-root.has-custom-bg .lobby-body .diff-card,
.app-root.has-custom-bg .lobby-body .lobby-create-mode,
.app-root.has-custom-bg .lobby-body .join-panel,
.app-root.has-custom-bg .lobby-body .tips {
  text-shadow: 0 1px 3px rgba(0, 0, 0, .85), 0 0 6px rgba(0, 0, 0, .6);
}
/* 大标题投影稍重 */
.app-root.has-custom-bg .lobby-body .mode-card__text,
.app-root.has-custom-bg .lobby-body .diff-card__name,
.app-root.has-custom-bg .lobby-body .create-box__mode-opt-name {
  text-shadow: 0 2px 8px rgba(0, 0, 0, .9), 0 0 3px rgba(0, 0, 0, .8);
}
/* 输入框文字同样保证可读 */
.app-root.has-custom-bg .lobby-body .field__input {
  text-shadow: 0 1px 3px rgba(0, 0, 0, .9);
}

/* ===== 有自定义背景时：滚动条透明化 ===== */
.app-root.has-custom-bg .lobby-body::-webkit-scrollbar,
.app-root.has-custom-bg .screen__scroll::-webkit-scrollbar { width: 5px; }
.app-root.has-custom-bg .lobby-body::-webkit-scrollbar-track,
.app-root.has-custom-bg .screen__scroll::-webkit-scrollbar-track { background: transparent; }
.app-root.has-custom-bg .lobby-body::-webkit-scrollbar-thumb,
.app-root.has-custom-bg .screen__scroll::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, .18);
  border-radius: 3px;
}
.app-root.has-custom-bg .lobby-body::-webkit-scrollbar-thumb:hover,
.app-root.has-custom-bg .screen__scroll::-webkit-scrollbar-thumb:hover {
  background: rgba(78, 216, 175, .45);
}