/* ============================================================
   首屏關鍵樣式（critical）—— 不依賴 JS / 不依賴打包樣式
   職責：
   1) 首屏骨架屏：JS 未到位前先給出品牌感，避免一片死黑
   2) noscript 卡片：沒開 JS / 載入失敗時仍能拿到客服入口
   3) 移動端關鍵斷點：小屏下字級、觸控目標、安全區內距
   ============================================================ */
:root {
  --c-bg: #07070a;
  --c-ink: #f3f0e9;
  --c-muted: #9d988d;
  --c-gold: #d4af5f;
  --c-gold-lt: #f0dca6;
  --c-line: rgba(212, 175, 95, 0.16);
}

#boot.boot-skeleton {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.35rem;
  background:
    radial-gradient(120% 80% at 50% 0%, rgba(212, 175, 95, 0.09), transparent 62%),
    var(--c-bg);
  color: var(--c-ink);
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  transition: opacity 0.45s ease, visibility 0.45s ease;
}

#boot.boot-out {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.boot-logo {
  width: 108px;
  height: 108px;
  border-radius: 26px;
  border: 1px solid var(--c-line);
  background: linear-gradient(145deg, rgba(212, 175, 95, 0.22), rgba(255, 255, 255, 0.02));
}

.boot-skeleton-lines {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}

.sk-line {
  display: block;
  width: 168px;
  height: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
}

.sk-line.short {
  width: 104px;
}

.sk,
.sk-line {
  position: relative;
  overflow: hidden;
}

.sk::after,
.sk-line::after {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, rgba(212, 175, 95, 0.16), transparent);
  animation: sk-sweep 1.5s var(--c-ease, cubic-bezier(0.22, 0.61, 0.36, 1)) infinite;
}

@keyframes sk-sweep {
  100% {
    transform: translateX(100%);
  }
}

.boot-tip {
  margin: 0;
  font-size: 0.82rem;
  letter-spacing: 0.21em;
  color: var(--c-muted);
}

.boot-fail {
  max-width: 22rem;
  padding: 1.2rem 1.4rem;
  text-align: center;
  line-height: 1.85;
  font-size: 0.95rem;
  border: 1px solid var(--c-line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
}

.boot-fail b {
  color: var(--c-gold-lt);
}

.noscript-card {
  max-width: 26rem;
  margin: 4rem auto;
  padding: 2rem 1.6rem;
  text-align: center;
  border: 1px solid var(--c-line);
  border-radius: 20px;
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: "Noto Sans TC", "PingFang TC", system-ui, sans-serif;
}

.noscript-card img {
  border-radius: 20px;
  border: 1px solid var(--c-line);
}

.noscript-title {
  margin: 1.1rem 0 0.5rem;
  color: var(--c-gold-lt);
  font-size: 1.02rem;
  letter-spacing: 0.04em;
}

.noscript-text {
  margin: 0;
  color: var(--c-muted);
  font-size: 0.9rem;
  line-height: 1.9;
}

.noscript-text strong {
  color: var(--c-gold);
}

/* ---------- 移動端關鍵斷點 ---------- */
@media (max-width: 640px) {
  .boot-logo {
    width: 84px;
    height: 84px;
    border-radius: 20px;
  }

  .noscript-card {
    margin: 2rem 1rem;
    padding: 1.5rem 1.1rem;
  }
}

/* 瀏海機 / 全面屏：貼邊元素留出安全區 */
@supports (padding: max(0px)) {
  @media (max-width: 640px) {
    .noscript-card {
      margin-bottom: max(2rem, env(safe-area-inset-bottom));
    }
  }
}

/* 橫屏矮視窗：別讓骨架屏撐爆首屏 */
@media (max-height: 460px) and (orientation: landscape) {
  #boot.boot-skeleton {
    gap: 0.7rem;
  }

  .boot-logo {
    width: 64px;
    height: 64px;
  }
}

/* 尊重系統「減少動效」設定 */
@media (prefers-reduced-motion: reduce) {
  .sk::after,
  .sk-line::after {
    animation: none;
  }

  #boot.boot-skeleton {
    transition: none;
  }
}

/* 列印時不輸出骨架屏 */
@media print {
  #boot.boot-skeleton {
    display: none;
  }
}