/* =================================
   輪播圖組件樣式
   ================================= */

/* 主要輪播圖區域 */
.hero-carousel {
    position: relative;
    height: 70vh;
    min-height: 500px;
    overflow: hidden;
    background-color: #0a1a2e; /* 切換間隙的深色底 */
}

/* Bootstrap 的 .carousel 和 .carousel-inner 繼承高度 */
.hero-carousel .carousel,
.hero-carousel .carousel-inner {
    height: 100%;
}

/*
 * .carousel-inner 建立獨立的 stacking context（z-index: 0）。
 * Bootstrap 的 controls 在 z-index: 1，indicators 在 z-index: 2，
 * 所以它們自然浮在所有 slide 內容之上，不需要額外設定。
 */
.hero-carousel .carousel-inner {
    position: relative;
    z-index: 0;
}

/* 所有 slide 疊放在同一位置，預設隱藏 */
.hero-carousel .carousel-item {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
    transform: none !important; /* 關閉 Bootstrap 預設的 slide 位移 */
}

/* 當前 slide 顯示 */
.hero-carousel .carousel-item.active {
    opacity: 1;
}

/*
 * 切換中：舊 slide 維持不透明（不淡出），讓新 slide 疊上去淡入。
 * 新 slide 淡入完成後，Bootstrap 移除 active，舊 slide 回到 opacity: 0。
 */
.hero-carousel .carousel-item.active.carousel-item-start,
.hero-carousel .carousel-item.active.carousel-item-end {
    opacity: 1;
    transition: none;
}

.hero-carousel .carousel-item-next.carousel-item-start,
.hero-carousel .carousel-item-prev.carousel-item-end {
    opacity: 1;
}

/* ---- Slide 內部內容 ---- */

.carousel-slide {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
}

/* 背景圖 */
.carousel-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: var(--z-layer-1);
}

/* 深色漸層遮罩 */
.carousel-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0,0,0,0.6) 0%, rgba(0,0,0,0.3) 100%);
    z-index: var(--z-layer-2);
}

/* 文字內容 - 左對齊 editorial 風格 */
.carousel-content {
    position: relative;
    z-index: var(--z-layer-3);
    color: var(--bg-white);
    width: 100%;
}

.carousel-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 400;
    line-height: 1.15;
    margin-bottom: var(--spacing-lg);
    text-shadow: 1px 2px 8px rgba(0,0,0,0.4);
}

.carousel-description {
    font-size: var(--font-lg);
    margin-bottom: var(--spacing-xl);
    line-height: var(--line-height-relaxed);
    max-width: 480px;
    opacity: 0.9;
}

.carousel-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-carousel .btn-hero-primary,
.hero-carousel .btn-hero-primary:link,
.hero-carousel .btn-hero-primary:visited {
    background: var(--primary-color);
    color: #faf7f2;
    border: 2px solid var(--primary-color);
    padding: 13px 32px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.04em;
    text-decoration: none;
    transition: all var(--transition-base);
    display: inline-block;
}

.hero-carousel .btn-hero-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: #faf7f2;
    transform: translateY(-2px);
    text-decoration: none;
}

.hero-carousel .btn-hero-outline,
.hero-carousel .btn-hero-outline:link,
.hero-carousel .btn-hero-outline:visited {
    background: transparent;
    color: rgba(250, 247, 242, 0.9);
    border: 2px solid rgba(250, 247, 242, 0.45);
    padding: 13px 32px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.04em;
    text-decoration: none;
    transition: all var(--transition-base);
    display: inline-block;
}

.hero-carousel .btn-hero-outline:hover {
    border-color: rgba(250, 247, 242, 0.8);
    color: #faf7f2;
    transform: translateY(-2px);
    text-decoration: none;
}

/* 進場動畫 */
.animate-up {
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 0.8s ease-out forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }

@keyframes slideUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 響應式 */
@media (max-width: 768px) {
    .hero-carousel {
        height: 50vh;
        min-height: 400px;
    }

    .carousel-title {
        font-size: var(--font-3xl);
    }

    .carousel-description {
        font-size: var(--font-md);
    }

    .carousel-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}