/* NESTIR 大廳 — 3D 沉浸入口（WebGPU）樣式 */
:root {
  --lobby-bg: #0A1E31;
  --lobby-ink: #142E47;
  --lobby-blue: #496576;
  --lobby-paper: #E9EAE7;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
}

.lobby-body {
  background: var(--lobby-bg);
  color: var(--lobby-paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Noto Sans TC", sans-serif;
  overflow: hidden;
}

#lobby {
  position: fixed;
  inset: 0;
  overflow: hidden;
  background: var(--lobby-bg);
}

#scene {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

/* 漂浮在 3D 節點上的 HTML 標籤（不攔截點擊） */
#labels {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.node-label {
  position: absolute;
  top: 0;
  left: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  text-align: center;
  will-change: transform, opacity;
  transition: opacity 160ms ease;
}

.node-label__dot {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: var(--node-color, #496576);
  color: #fff;
  font-weight: 800;
  font-size: 15px;
  letter-spacing: .04em;
  box-shadow: 0 8px 22px rgba(0, 0, 0, .45);
}

.node-label__name {
  font-weight: 750;
  font-size: 14px;
  letter-spacing: .02em;
  text-shadow: 0 2px 8px rgba(0, 0, 0, .8);
}

.node-label__zh {
  font-size: 11px;
  color: #B9C6CE;
  text-shadow: 0 2px 8px rgba(0, 0, 0, .8);
}

.node-label--active .node-label__zh {
  color: var(--node-color, #7FBF9F);
}

/* 頂部導覽列 */
.lobby-bar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
  background: linear-gradient(rgba(10, 30, 49, .9), rgba(10, 30, 49, 0));
  z-index: 20;
}

.lobby-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--lobby-paper);
  text-decoration: none;
  font-weight: 750;
  letter-spacing: .17em;
  font-size: 15px;
}

.lobby-compass {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border: 1.5px solid #B9C6CE;
  border-radius: 50%;
}
.lobby-compass:before,
.lobby-compass:after {
  content: "";
  position: absolute;
  background: #B9C6CE;
}
.lobby-compass:before { width: 1px; height: calc(100% + 6px); }
.lobby-compass:after { height: 1px; width: calc(100% + 6px); }
.lobby-compass i {
  width: 8px; height: 12px;
  background: #347A5B;
  clip-path: polygon(50% 0, 88% 50%, 50% 100%, 12% 50%);
  transform: rotate(26deg);
}

.lobby-title { font-weight: 650; color: #B9C6CE; letter-spacing: .2em; }
.lobby-exit { color: #B9C6CE; text-decoration: none; font-weight: 650; padding: 8px; }
.lobby-actions { display: flex; align-items: center; gap: 4px; }

.lobby-gear {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: #B9C6CE;
  transition: transform 260ms ease-out, color 160ms ease;
}
.lobby-gear:hover { color: var(--lobby-paper); }
.lobby-gear:active { transform: scale(.9); transition-duration: 85ms; }
.lobby-gear__icon { width: 21px; height: 21px; }

/* 設定面板 */
.settings-panel {
  position: absolute;
  top: 64px;
  right: 18px;
  z-index: 30;
  width: min(300px, calc(100vw - 36px));
  padding: 16px;
  border-radius: 20px;
  background: rgba(20, 46, 71, .97);
  color: var(--lobby-paper);
  box-shadow: 0 18px 44px rgba(0, 0, 0, .5);
}

.settings-panel__title {
  font-weight: 750;
  letter-spacing: .14em;
  font-size: 13px;
  color: #B9C6CE;
  margin-bottom: 14px;
}

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-weight: 650;
  font-size: 14px;
}

.settings-seg {
  display: flex;
  padding: 3px;
  border-radius: 999px;
  background: rgba(233, 234, 231, .12);
}

.settings-seg__btn {
  border: 0;
  background: transparent;
  color: #B9C6CE;
  font-weight: 700;
  font-size: 13px;
  padding: 7px 14px;
  border-radius: 999px;
  transition: background 160ms ease, color 160ms ease;
}
.settings-seg__btn.is-active {
  background: var(--lobby-blue, #496576);
  color: #fff;
}

.settings-note {
  margin: 12px 0 0;
  font-size: 12px;
  color: #B9C6CE;
  line-height: 1.5;
}

.settings-reset {
  margin-top: 14px;
  width: 100%;
  border: 1px solid rgba(233, 234, 231, .25);
  background: transparent;
  color: var(--lobby-paper);
  border-radius: 999px;
  padding: 9px 0;
  font-weight: 650;
  font-size: 13px;
}
.settings-reset:hover { background: rgba(233, 234, 231, .1); }

.lobby-hint {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  margin: 0;
  color: #7E94A3;
  font-size: 12px;
  letter-spacing: .05em;
  z-index: 20;
  pointer-events: none;
}

/* 2D 後備網格 */
#fallback {
  position: absolute;
  inset: 0;
  overflow: auto;
  background: var(--lobby-paper);
  color: var(--lobby-ink);
  padding: 84px 20px 40px;
}

.fallback-heading { max-width: 860px; margin: 0 auto 28px; }
.fallback-heading h1 { margin: 0; font-size: 40px; letter-spacing: -.04em; }
.fallback-heading p { color: var(--lobby-blue); margin: 10px 0 0; }

.fallback-cards {
  max-width: 860px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}

.fallback-card {
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
  padding: 18px;
  border: 0;
  border-radius: 22px;
  background: rgba(215, 220, 221, .6);
  color: var(--lobby-ink);
  cursor: pointer;
  transition: transform 85ms ease;
}
.fallback-card:active { transform: scale(.97); }

.fallback-card__icon {
  flex: none;
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: var(--node-color, #496576);
  color: #fff;
  font-weight: 800;
  font-size: 17px;
}

.fallback-card__body { display: flex; flex-direction: column; gap: 2px; }
.fallback-card__body strong { font-size: 16px; }
.fallback-card__zh { font-size: 13px; color: var(--lobby-blue); }
.fallback-card__status { font-size: 11px; letter-spacing: .06em; color: #7E94A3; text-transform: uppercase; }
.fallback-card--active .fallback-card__status { color: #347A5B; font-weight: 700; }

/* toast */
#toast {
  position: fixed;
  left: 50%;
  bottom: 34px;
  transform: translateX(-50%) translateY(20px);
  background: rgba(20, 46, 71, .95);
  color: #fff;
  padding: 12px 20px;
  border-radius: 20px;
  font-weight: 650;
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms ease, transform 200ms ease;
  z-index: 50;
}
#toast.toast--show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .node-label, .fallback-card, #toast { transition: none; }
}