/* 
 * 顶部进度条组件 - YouTube风格
 * 简约、不干扰的页面加载指示器
 */

/* 顶部进度条容器 */
.top-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    z-index: 10001; /* 确保在导航栏之上 (导航栏是10000) */
    background-color: rgba(0, 0, 0, 0.05);
    pointer-events: none; /* 不阻止用户交互 */
    opacity: 0;
    transition: opacity 0.3s ease;
}

/* 进度条显示状态 */
.top-progress-bar.active {
    opacity: 1;
}

/* 进度条主体 */
.top-progress-bar .progress {
    height: 100%;
    background: linear-gradient(
        90deg,
        #4a6cf7 0%,
        #6c5ce7 50%,
        #a29bfe 100%
    );
    width: 0%;
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

/* 动态光效 */
.top-progress-bar .progress::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    animation: shimmer 1.5s infinite;
    transform: translateX(-100%);
}

/* 光效动画 */
@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    50% {
        transform: translateX(100%);
    }
    100% {
        transform: translateX(100%);
    }
}

/* 不确定进度的动画（当无法确定具体进度时） */
.top-progress-bar.indeterminate .progress {
    width: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        #4a6cf7 20%,
        #6c5ce7 50%,
        #a29bfe 80%,
        transparent 100%
    );
    background-size: 50% 100%;
    animation: indeterminate 1.5s infinite linear;
}

@keyframes indeterminate {
    0% {
        background-position: -50% 0;
    }
    100% {
        background-position: 150% 0;
    }
}

/* 完成动画 */
.top-progress-bar.complete .progress {
    width: 100%;
    transition: width 0.2s ease;
}

.top-progress-bar.complete {
    animation: fadeOut 0.5s ease 0.3s forwards;
}

@keyframes fadeOut {
    to {
        opacity: 0;
    }
}

/* 移动端适配 */
@media (max-width: 768px) {
    .top-progress-bar {
        height: 2px; /* 移动端稍微细一点 */
    }
}

/* 深色主题支持（如果需要） */
@media (prefers-color-scheme: dark) {
    .top-progress-bar {
        background-color: rgba(255, 255, 255, 0.1);
    }
    
    .top-progress-bar .progress {
        background: linear-gradient(
            90deg,
            #74b9ff 0%,
            #81ecec 50%,
            #00cec9 100%
        );
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    .top-progress-bar .progress {
        background: #000;
    }
}

/* 减少动画模式支持 */
@media (prefers-reduced-motion: reduce) {
    .top-progress-bar .progress {
        transition: none;
    }
    
    .top-progress-bar .progress::after {
        animation: none;
    }
    
    .top-progress-bar.indeterminate .progress {
        animation: none;
        background-position: 0 0;
    }
} 
 * 顶部进度条组件 - YouTube风格
 * 简约、不干扰的页面加载指示器
 */

/* 顶部进度条容器 */
.top-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    z-index: 10001; /* 确保在导航栏之上 (导航栏是10000) */
    background-color: rgba(0, 0, 0, 0.05);
    pointer-events: none; /* 不阻止用户交互 */
    opacity: 0;
    transition: opacity 0.3s ease;
}

/* 进度条显示状态 */
.top-progress-bar.active {
    opacity: 1;
}

/* 进度条主体 */
.top-progress-bar .progress {
    height: 100%;
    background: linear-gradient(
        90deg,
        #4a6cf7 0%,
        #6c5ce7 50%,
        #a29bfe 100%
    );
    width: 0%;
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

/* 动态光效 */
.top-progress-bar .progress::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    animation: shimmer 1.5s infinite;
    transform: translateX(-100%);
}

/* 光效动画 */
@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    50% {
        transform: translateX(100%);
    }
    100% {
        transform: translateX(100%);
    }
}

/* 不确定进度的动画（当无法确定具体进度时） */
.top-progress-bar.indeterminate .progress {
    width: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        #4a6cf7 20%,
        #6c5ce7 50%,
        #a29bfe 80%,
        transparent 100%
    );
    background-size: 50% 100%;
    animation: indeterminate 1.5s infinite linear;
}

@keyframes indeterminate {
    0% {
        background-position: -50% 0;
    }
    100% {
        background-position: 150% 0;
    }
}

/* 完成动画 */
.top-progress-bar.complete .progress {
    width: 100%;
    transition: width 0.2s ease;
}

.top-progress-bar.complete {
    animation: fadeOut 0.5s ease 0.3s forwards;
}

@keyframes fadeOut {
    to {
        opacity: 0;
    }
}

/* 移动端适配 */
@media (max-width: 768px) {
    .top-progress-bar {
        height: 2px; /* 移动端稍微细一点 */
    }
}

/* 深色主题支持（如果需要） */
@media (prefers-color-scheme: dark) {
    .top-progress-bar {
        background-color: rgba(255, 255, 255, 0.1);
    }
    
    .top-progress-bar .progress {
        background: linear-gradient(
            90deg,
            #74b9ff 0%,
            #81ecec 50%,
            #00cec9 100%
        );
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    .top-progress-bar .progress {
        background: #000;
    }
}

/* 减少动画模式支持 */
@media (prefers-reduced-motion: reduce) {
    .top-progress-bar .progress {
        transition: none;
    }
    
    .top-progress-bar .progress::after {
        animation: none;
    }
    
    .top-progress-bar.indeterminate .progress {
        animation: none;
        background-position: 0 0;
    }
}