/* 進階loading樣式 - 備用或未來使用 */

/* 頁面初始隱藏狀態 */
body.loading {
    visibility: hidden;
}

body.loaded {
    visibility: visible;
    animation: pageAppear 0.5s ease-in-out;
}

@keyframes pageAppear {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 全域loading遮罩 */
.global-loading-mask {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 999999;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.global-loading-content {
    text-align: center;
    padding: 40px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.loading-logo-large {
    max-width: 150px;
    margin-bottom: 30px;
    opacity: 0.9;
    animation: logoFloat 3s ease-in-out infinite;
}

@keyframes logoFloat {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

.loading-spinner-elegant {
    width: 50px;
    height: 50px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #ff5657;
    border-radius: 50%;
    animation: elegantSpin 1.2s cubic-bezier(0.4, 0.0, 0.2, 1) infinite;
    margin: 0 auto 20px;
}

@keyframes elegantSpin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.loading-progress-bar {
    width: 280px;
    height: 6px;
    background-color: rgba(255, 86, 87, 0.1);
    border-radius: 3px;
    margin: 20px auto;
    overflow: hidden;
    position: relative;
}

.loading-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #ff5657, #ff8a80, #ff5657);
    border-radius: 3px;
    transition: width 0.4s cubic-bezier(0.4, 0.0, 0.2, 1);
    position: relative;
}

.loading-progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.4) 50%,
        transparent 100%
    );
    animation: shimmer 2s ease-in-out infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

.loading-text {
    color: #6c757d;
    font-size: 14px;
    margin-top: 15px;
    font-weight: 500;
}

.loading-subtitle {
    color: #adb5bd;
    font-size: 12px;
    margin-top: 5px;
}

/* 載入完成後的淡入效果 */
.content-fade-in {
    animation: contentFadeIn 0.8s cubic-bezier(0.4, 0.0, 0.2, 1) forwards;
}

@keyframes contentFadeIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* 響應式設計 */
@media (max-width: 768px) {
    .global-loading-content {
        padding: 30px 20px;
        margin: 0 20px;
    }

    .loading-logo-large {
        max-width: 120px;
    }

    .loading-progress-bar {
        width: 240px;
    }
}

/* 減少動畫效果（尊重用戶偏好） */
@media (prefers-reduced-motion: reduce) {
    .loading-spinner-elegant,
    .loading-logo-large,
    .loading-progress-fill::after {
        animation: none;
    }

    .content-fade-in,
    body.loaded {
        animation: none;
    }
}