/**
 * PageLoader CSS - 页面加载动画样式
 * 
 * 提供页面跳转时的加载动画效果
 */

/* ========================================
   页面加载器
======================================== */

.page-loader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: transparent;
    pointer-events: none;
    z-index: 99999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    /* 硬件加速 */
    transform: translateZ(0);
    will-change: opacity;
}

.page-loader.show {
    opacity: 1;
    visibility: visible;
}

/* Spinner 和 Dots 类型需要全屏遮罩 */
.page-loader:has(.page-loader-content),
.page-loader:has(.page-loader-dots-center) {
    background: rgba(255, 255, 255, 0.95);
    pointer-events: all;
}

.page-loader-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}



/* ========================================
   加载动画 - Spinner
======================================== */

.page-loader-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(var(--primary-rgb, 79, 70, 229), 0.1);
    border-top-color: var(--primary, #4F46E5);
    border-radius: 50%;
    animation: page-loader-spin 0.8s linear infinite;
    /* 硬件加速 */
    transform: translateZ(0);
    will-change: transform;
}

@keyframes page-loader-spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* ========================================
   加载文本
======================================== */

.page-loader-text {
    color: #4B5563;
    font-size: 16px;
    font-weight: 500;
    animation: page-loader-pulse 1.5s ease-in-out infinite;
}

@keyframes page-loader-pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* ========================================
   进度条样式 - 从左到右填充
======================================== */

.page-loader-progress {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: rgba(var(--primary-rgb, 79, 70, 229), 0.15);
    overflow: hidden;
}

.page-loader-progress-bar {
    height: 100%;
    background: var(--primary, #4F46E5);
    width: 0%;
    animation: page-loader-progress-fill 2.5s ease-in-out infinite;
    box-shadow: 2px 0 8px var(--primary, #4F46E5);
}

@keyframes page-loader-progress-fill {
    0% {
        width: 0%;
    }
    50% {
        width: 70%;
    }
    100% {
        width: 100%;
    }
}

/* ========================================
   顶部滑动条样式 - 短条左右滑动
======================================== */

.page-loader-bar {
    position: absolute;
    top: 0;
    left: 0;
    width: 25%;
    height: 4px;
    background: linear-gradient(90deg, 
        transparent,
        var(--primary, #4F46E5),
        var(--primary, #4F46E5),
        transparent
    );
    animation: page-loader-bar-slide 1s linear infinite;
    box-shadow: 0 0 15px var(--primary, #4F46E5);
}

@keyframes page-loader-bar-slide {
    0% {
        left: -25%;
    }
    100% {
        left: 100%;
    }
}

/* ========================================
   波浪进度条样式 - 渐变波浪左右移动（更明显）
======================================== */

.page-loader-wave {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: rgba(var(--primary-rgb, 79, 70, 229), 0.08);
    overflow: hidden;
}

.page-loader-wave-bar {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 200%;
    background: linear-gradient(90deg, 
        transparent 0%,
        rgba(var(--primary-rgb, 79, 70, 229), 0.3) 25%,
        var(--primary, #4F46E5) 50%,
        rgba(var(--primary-rgb, 79, 70, 229), 0.3) 75%,
        transparent 100%
    );
    animation: page-loader-wave-move 2s ease-in-out infinite;
    filter: blur(1px);
    box-shadow: 0 0 25px var(--primary, #4F46E5);
}

@keyframes page-loader-wave-move {
    0% {
        transform: translateX(-50%);
    }
    100% {
        transform: translateX(0%);
    }
}

/* ========================================
   跑马灯进度条样式 - 分段递进式加载
======================================== */

.page-loader-marquee {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: rgba(var(--primary-rgb, 79, 70, 229), 0.12);
    overflow: hidden;
}

.page-loader-marquee-bar {
    height: 100%;
    background: var(--primary, #4F46E5);
    width: 0%;
    animation: page-loader-marquee-progress 3s ease-out infinite;
    box-shadow: 3px 0 12px var(--primary, #4F46E5);
    position: relative;
}

.page-loader-marquee-bar::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent,
        rgba(255, 255, 255, 0.4),
        transparent
    );
    animation: page-loader-marquee-shine 1.5s ease-in-out infinite;
}

@keyframes page-loader-marquee-progress {
    0% {
        width: 0%;
    }
    30% {
        width: 30%;
    }
    35% {
        width: 30%;
    }
    65% {
        width: 60%;
    }
    70% {
        width: 60%;
    }
    100% {
        width: 95%;
    }
}

@keyframes page-loader-marquee-shine {
    0% {
        transform: translateX(-100px);
    }
    100% {
        transform: translateX(400px);
    }
}

/* ========================================
   跳动圆点样式 - 顶部中央卡片
======================================== */

.page-loader-dots {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    padding: 16px 24px;
    background: var(--surface, #ffffff);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    border: 1px solid var(--outline, #e0e0e0);
}

.page-loader-dot {
    width: 12px;
    height: 12px;
    background: var(--primary, #4F46E5);
    border-radius: 50%;
    animation: page-loader-dot-bounce 1.2s infinite ease-in-out;
}

.page-loader-dot:nth-child(1) {
    animation-delay: 0s;
}

.page-loader-dot:nth-child(2) {
    animation-delay: 0.15s;
}

.page-loader-dot:nth-child(3) {
    animation-delay: 0.3s;
}

@keyframes page-loader-dot-bounce {
    0%, 60%, 100% {
        transform: translateY(0) scale(1);
    }
    30% {
        transform: translateY(-15px) scale(1.2);
    }
}

/* ========================================
   暗色主题支持
======================================== */

@media (prefers-color-scheme: dark) {
    .page-loader {
        background: rgba(17, 24, 39, 0.95);
    }

    .page-loader-text {
        color: #D1D5DB;
    }

    .page-loader-spinner {
        border-color: var(--primary-container);
        border-top-color: var(--primary);
    }
}

/* ========================================
   响应式设计
======================================== */

@media (max-width: 768px) {
    .page-loader-spinner {
        width: 40px;
        height: 40px;
        border-width: 3px;
    }

    .page-loader-text {
        font-size: 14px;
    }
}

/* ========================================
   减少动画（无障碍）
======================================== */

@media (prefers-reduced-motion: reduce) {
    .page-loader,
    .page-loader-spinner,
    .page-loader-text,
    .page-loader-progress-bar {
        animation: none;
        transition: none;
    }

    .page-loader-spinner {
        border-top-color: var(--primary);
        border-right-color: var(--primary);
    }
}

/* ========================================
   打印时隐藏
======================================== */

@media print {
    .page-loader {
        display: none !important;
    }
}

/* ========================================
   加载器变体 - 带进度条
======================================== */

.page-loader.with-progress .page-loader-content {
    margin-top: 3px;
}

/* ========================================
   加载器变体 - 简约风格
======================================== */

.page-loader.minimal {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(4px);
}

.page-loader.minimal .page-loader-spinner {
    width: 40px;
    height: 40px;
    border-width: 3px;
}

.page-loader.minimal .page-loader-text {
    font-size: 14px;
}

/* ========================================
   加载器变体 - 品牌色
======================================== */

.page-loader.brand .page-loader-spinner {
    border-top-color: var(--primary, #4F46E5);
}

.page-loader.brand .page-loader-text {
    color: var(--primary, #4F46E5);
}