/* 骨架屏加載效果 */
.skeleton-loader {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 8px;
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* 骨架屏容器 */
.skeleton-container {
    padding: 20px;
    background: white;
    border-radius: 12px;
    margin: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* 不同類型的骨架屏元素 */
.skeleton-text {
    height: 16px;
    margin: 8px 0;
    border-radius: 4px;
}

.skeleton-text.large {
    height: 24px;
    width: 60%;
}

.skeleton-text.medium {
    height: 20px;
    width: 80%;
}

.skeleton-text.small {
    height: 16px;
    width: 40%;
}

.skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    margin-right: 12px;
}

.skeleton-card {
    height: 120px;
    margin: 12px 0;
    border-radius: 8px;
}

.skeleton-button {
    height: 40px;
    width: 120px;
    border-radius: 20px;
    margin: 8px 4px;
}

/* 骨架屏佈局 */
.skeleton-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.skeleton-content {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.skeleton-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
    margin: 20px 0;
}

/* 響應式設計 */
@media (max-width: 768px) {
    .skeleton-container {
        margin: 8px;
        padding: 16px;
    }
    
    .skeleton-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    .skeleton-loader {
        background: linear-gradient(90deg, #2a2a2a 25%, #3a3a3a 50%, #2a2a2a 75%);
        background-size: 200% 100%;
    }
    
    .skeleton-container {
        background: #1a1a1a;
        box-shadow: 0 2px 8px rgba(255,255,255,0.1);
    }
}

/* 淡入動畫 */
.skeleton-fade-in {
    animation: skeleton-fade-in 0.3s ease-in-out;
}

@keyframes skeleton-fade-in {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 淡出動畫 */
.skeleton-fade-out {
    animation: skeleton-fade-out 0.3s ease-in-out forwards;
}

@keyframes skeleton-fade-out {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-10px);
    }
}