/* ========== GLOBAL STYLE // TRANSITION OVERLAY ========== */
body {
  overflow-x: hidden;

  &.no-scroll {
    overflow: hidden !important;
    height: 100dvh;
  }
}

/* ========== TRANSITION OVERLAY ========== */
#transition-overlay {
  position: fixed;
  inset: 0;
  overflow: hidden;
  z-index: 9999;
  background: linear-gradient(to top, #063E7F 0%, #1278D2 100%);
}

/* LOGO (centered) */
.logo-wrapper {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 70%;
  max-width: 700px;
  height: 70%;
  max-height: 290px;
  z-index: 2;
}

/* 實心 Logo */
#logo-solid {
  position: absolute;
  inset: 0;
  width: 100%;
  height: auto;
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
  object-fit: contain;
  vertical-align: top;
}

/* 線條 SVG (Vivus) */
#logo-line svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: auto;
  opacity: 1;
  transition: opacity 1.2s ease-in-out;
  object-fit: contain;
  vertical-align: top;
}

/* ----------------------------------
   基礎設定
----------------------------------- */
.page-wrapper {
  opacity: 0;
  /* 建議初始不要 transform，或是僅在 animation 中定義，
     避免 GSAP 與 CSS 衝突。若需要位移進場效果，請保留。 */
  transform: translateY(10px); 
}

.page-wrapper.fade-in {
  animation: fadeInPage 0.6s ease-out forwards;
}

@keyframes fadeInPage {
  0% {
    opacity: 0;
    transform: translateY(10px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ----------------------------------
   Overlay 優化 (適應 iOS)
----------------------------------- */
#transition-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  /* 使用 dvh (Dynamic Viewport Height) 解決 iOS Safari 網址列遮擋問題 */
  height: 100vh; 
  height: 100dvh; 
  z-index: 9999;
  display: block; /* 預設顯示，由 JS 控制隱藏 */
  overflow: hidden; /* 防止內部溢出 */
}

/* ----------------------------------
   Scroll Lock 優化
----------------------------------- */
body.no-scroll {
  overflow: hidden;
  height: 100%; /* iOS 有時需要這行才能真正鎖住 */
  touch-action: none; /* 禁止觸控滑動行為 */
}

/* ----------------------------------
   ⚠️ 重要：請刪除以下這段代碼！
   這段代碼是導致 iOS 上完全沒動畫的主因。
----------------------------------- */
#transition-overlay {
  display: none;
}

#transition-overlay.is-active {
  display: block;
}

#logo-solid {
  opacity: 0;
}