{#
    WOOO 品牌載入動畫組件

    使用方式：
        1. 在頁面中 include 此組件：
           {% include 'components/_loading.html' %}

        2. 在 JavaScript 中控制顯示/隱藏：
           showLoading('正在載入數據...')  // 顯示
           hideLoading()                    // 隱藏

        3. 也可直接操作 DOM：
           document.getElementById('loadingOverlay').style.display = 'flex';  // 顯示
           document.getElementById('loadingOverlay').style.display = 'none';  // 隱藏
#}

<!-- WOOO Loading Overlay -->
<div id="loadingOverlay" class="wooo-loading-overlay">
    <div class="loading-logo-container">
        <!-- 脈衝光暈 -->
        <div class="logo-pulse"></div>
        <!-- 外層旋轉光環 -->
        <div class="logo-ring"></div>
        <!-- 內層反向旋轉光環 -->
        <div class="logo-ring-inner"></div>
        <!-- 環繞粒子 -->
        <div class="orbit-particles">
            <div class="orbit-particle"></div>
            <div class="orbit-particle"></div>
            <div class="orbit-particle"></div>
            <div class="orbit-particle"></div>
        </div>
        <!-- 閃爍星星 -->
        <div class="sparkles">
            <div class="sparkle"></div>
            <div class="sparkle"></div>
            <div class="sparkle"></div>
            <div class="sparkle"></div>
            <div class="sparkle"></div>
            <div class="sparkle"></div>
        </div>
        <!-- LOGO -->
        <div class="loading-logo">WOOO</div>
    </div>
    <div class="loading-text" id="loadingText">
        <i class="fas fa-spinner fa-spin me-2"></i>正在載入數據...
    </div>
    <div class="loading-progress">
        <div class="loading-progress-bar"></div>
    </div>
    <div class="loading-hint" id="loadingHint">
        大量資料可能需要較長時間，請稍候
    </div>
</div>

<style>
/* ============================================
   WOOO 品牌載入動畫樣式
   ============================================ */

.wooo-loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(240, 245, 255, 0.95) 100%);
    z-index: 9999;
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 25px;
    backdrop-filter: blur(8px);
}

/* LOGO 動畫容器 */
.wooo-loading-overlay .loading-logo-container {
    position: relative;
    width: 160px;
    height: 160px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.wooo-loading-overlay .loading-logo {
    z-index: 3;
    animation: wooo-cloud-float 3s ease-in-out infinite;
    font-size: 2.5rem;
    font-weight: 800;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 4px;
    filter: drop-shadow(0 4px 15px rgba(79, 70, 229, 0.4));
}

/* 雲端飄動動畫 */
@keyframes wooo-cloud-float {
    0%, 100% {
        transform: translateY(0) translateX(0) scale(1);
    }
    25% {
        transform: translateY(-15px) translateX(5px) scale(1.02);
    }
    50% {
        transform: translateY(-8px) translateX(-3px) scale(1);
    }
    75% {
        transform: translateY(-20px) translateX(3px) scale(1.01);
    }
}

/* 外層旋轉光環 */
.wooo-loading-overlay .logo-ring {
    position: absolute;
    width: 150px;
    height: 150px;
    border: 4px solid transparent;
    border-top-color: #4F46E5;
    border-right-color: #7C3AED;
    border-radius: 50%;
    animation: wooo-ring-spin 2s linear infinite;
}

/* 內層反向旋轉光環 */
.wooo-loading-overlay .logo-ring-inner {
    position: absolute;
    width: 120px;
    height: 120px;
    border: 3px solid transparent;
    border-bottom-color: #EC4899;
    border-left-color: #F59E0B;
    border-radius: 50%;
    animation: wooo-ring-spin-reverse 1.5s linear infinite;
}

/* 脈衝光暈 */
.wooo-loading-overlay .logo-pulse {
    position: absolute;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.3) 0%, transparent 70%);
    border-radius: 50%;
    animation: wooo-pulse-expand 2s ease-out infinite;
}

@keyframes wooo-ring-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes wooo-ring-spin-reverse {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(-360deg); }
}

@keyframes wooo-pulse-expand {
    0% {
        transform: scale(0.8);
        opacity: 1;
    }
    100% {
        transform: scale(1.8);
        opacity: 0;
    }
}

/* 環繞粒子 */
.wooo-loading-overlay .orbit-particles {
    position: absolute;
    width: 160px;
    height: 160px;
    animation: wooo-orbit-rotate 4s linear infinite;
}

.wooo-loading-overlay .orbit-particle {
    position: absolute;
    width: 8px;
    height: 8px;
    background: linear-gradient(135deg, #4F46E5, #7C3AED);
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(79, 70, 229, 0.8);
}

.wooo-loading-overlay .orbit-particle:nth-child(1) {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
}

.wooo-loading-overlay .orbit-particle:nth-child(2) {
    top: 50%;
    right: 0;
    transform: translateY(-50%);
}

.wooo-loading-overlay .orbit-particle:nth-child(3) {
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

.wooo-loading-overlay .orbit-particle:nth-child(4) {
    top: 50%;
    left: 0;
    transform: translateY(-50%);
}

@keyframes wooo-orbit-rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 閃爍星星 */
.wooo-loading-overlay .sparkles {
    position: absolute;
    width: 180px;
    height: 180px;
}

.wooo-loading-overlay .sparkle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: #FCD34D;
    border-radius: 50%;
    animation: wooo-sparkle-twinkle 1.5s ease-in-out infinite;
}

.wooo-loading-overlay .sparkle:nth-child(1) { top: 10%; left: 20%; animation-delay: 0s; }
.wooo-loading-overlay .sparkle:nth-child(2) { top: 5%; right: 25%; animation-delay: 0.3s; }
.wooo-loading-overlay .sparkle:nth-child(3) { bottom: 15%; right: 15%; animation-delay: 0.6s; }
.wooo-loading-overlay .sparkle:nth-child(4) { bottom: 10%; left: 25%; animation-delay: 0.9s; }
.wooo-loading-overlay .sparkle:nth-child(5) { top: 30%; left: 5%; animation-delay: 1.2s; }
.wooo-loading-overlay .sparkle:nth-child(6) { top: 25%; right: 5%; animation-delay: 0.4s; }

@keyframes wooo-sparkle-twinkle {
    0%, 100% {
        transform: scale(0);
        opacity: 0;
    }
    50% {
        transform: scale(1);
        opacity: 1;
    }
}

/* 載入文字 */
.wooo-loading-overlay .loading-text {
    font-size: 1.2rem;
    color: #4F46E5;
    font-weight: 600;
    text-align: center;
    letter-spacing: 0.5px;
}

.wooo-loading-overlay .loading-hint {
    font-size: 0.85rem;
    color: #6b7280;
    text-align: center;
    max-width: 300px;
}

/* 進度條 */
.wooo-loading-overlay .loading-progress {
    width: 200px;
    height: 4px;
    background: rgba(79, 70, 229, 0.2);
    border-radius: 2px;
    overflow: hidden;
}

.wooo-loading-overlay .loading-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #4F46E5, #7C3AED, #4F46E5);
    background-size: 200% 100%;
    animation: wooo-progress-flow 1.5s linear infinite;
    width: 100%;
}

@keyframes wooo-progress-flow {
    0% { background-position: 100% 0; }
    100% { background-position: -100% 0; }
}
</style>

<script>
/**
 * WOOO 載入動畫控制函數
 */

// 顯示載入動畫
function showLoading(text, hint) {
    const overlay = document.getElementById('loadingOverlay');
    const loadingText = document.getElementById('loadingText');
    const loadingHint = document.getElementById('loadingHint');

    if (text && loadingText) {
        loadingText.innerHTML = '<i class="fas fa-spinner fa-spin me-2"></i>' + text;
    }
    if (hint && loadingHint) {
        loadingHint.textContent = hint;
    }

    if (overlay) {
        overlay.style.display = 'flex';
    }
}

// 隱藏載入動畫
function hideLoading() {
    const overlay = document.getElementById('loadingOverlay');
    if (overlay) {
        overlay.style.display = 'none';
    }
}

// 更新載入文字
function updateLoadingText(text) {
    const loadingText = document.getElementById('loadingText');
    if (loadingText && text) {
        loadingText.innerHTML = '<i class="fas fa-spinner fa-spin me-2"></i>' + text;
    }
}

// 更新載入提示
function updateLoadingHint(hint) {
    const loadingHint = document.getElementById('loadingHint');
    if (loadingHint && hint) {
        loadingHint.textContent = hint;
    }
}
</script>