/**
 * global-enhancements.css - 全局交互增强样式
 * 
 * 功能：
 * - 页面加载动画
 * - 平滑过渡效果
 * - 滚动优化
 * - 无障碍支持
 * 
 * @version 1.0
 */

/* ========== CSS 变量定义 ========== */
:root {
    /* 动画时间 */
    --transition-instant: 0.1s;
    --transition-fast: 0.2s;
    --transition-normal: 0.3s;
    --transition-slow: 0.5s;
    
    /* 缓动函数 */
    --ease-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --ease-smooth: cubic-bezier(0.25, 0.1, 0.25, 1);
}

/* ========== 页面加载动画 ========== */
.page-loading {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #e2e8f0 100%);
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 20px;
}

.page-loading.fade-out {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(59, 130, 246, 0.1);
    border-top-color: #3b82f6;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-text {
    font-size: 1rem;
    color: #64748b;
    font-weight: 500;
}

.loading-dots::after {
    content: '';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes dots {
    0% { content: ''; }
    25% { content: '.'; }
    50% { content: '..'; }
    75% { content: '...'; }
    100% { content: ''; }
}

/* ========== 内容渐入动画 ========== */
.fade-in {
    animation: fadeIn 0.5s var(--ease-out) forwards;
}

.fade-in-up {
    animation: fadeInUp 0.6s var(--ease-out) forwards;
    opacity: 0;
}

.fade-in-down {
    animation: fadeInDown 0.6s var(--ease-out) forwards;
    opacity: 0;
}

.fade-in-left {
    animation: fadeInLeft 0.6s var(--ease-out) forwards;
    opacity: 0;
}

.fade-in-right {
    animation: fadeInRight 0.6s var(--ease-out) forwards;
    opacity: 0;
}

.fade-in-scale {
    animation: fadeInScale 0.5s var(--ease-bounce) forwards;
    opacity: 0;
}

/* 延迟动画类 */
.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-400 { animation-delay: 0.4s; }
.delay-500 { animation-delay: 0.5s; }

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ========== 悬停效果 ========== */
.hover-lift {
    transition: transform var(--transition-fast) var(--ease-out),
                box-shadow var(--transition-fast) var(--ease-out);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px -8px rgba(0, 0, 0, 0.15);
}

.hover-scale {
    transition: transform var(--transition-fast) var(--ease-out);
}

.hover-scale:hover {
    transform: scale(1.02);
}

.hover-glow {
    transition: box-shadow var(--transition-fast) var(--ease-out);
}

.hover-glow:hover {
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.hover-brightness {
    transition: filter var(--transition-fast) var(--ease-out);
}

.hover-brightness:hover {
    filter: brightness(1.05);
}

/* ========== 按钮交互效果 ========== */
.btn-interactive {
    position: relative;
    overflow: hidden;
    transition: all var(--transition-fast) var(--ease-out);
}

.btn-interactive::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-interactive:active::before {
    width: 300px;
    height: 300px;
}

.btn-interactive:active {
    transform: scale(0.98);
}

/* ========== 卡片交互效果 ========== */
.card-interactive {
    transition: all var(--transition-normal) var(--ease-out);
    cursor: pointer;
}

.card-interactive:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.15);
}

.card-interactive:active {
    transform: translateY(-2px);
}

/* ========== 输入框焦点效果 ========== */
.input-focus-effect {
    transition: all var(--transition-fast) var(--ease-out);
}

.input-focus-effect:focus {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15);
}

/* ========== 模态框动画 ========== */
.modal-enter {
    animation: modalEnter 0.3s var(--ease-out) forwards;
}

.modal-exit {
    animation: modalExit 0.2s var(--ease-in) forwards;
}

@keyframes modalEnter {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes modalExit {
    from {
        opacity: 1;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(0.95);
    }
}

/* ========== Toast 通知动画 ========== */
.toast-enter {
    animation: toastEnter 0.4s var(--ease-bounce) forwards;
}

.toast-exit {
    animation: toastExit 0.3s var(--ease-in) forwards;
}

@keyframes toastEnter {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes toastExit {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

/* ========== 骨架屏加载效果 ========== */
.skeleton {
    background: linear-gradient(
        90deg,
        #f1f5f9 25%,
        #e2e8f0 50%,
        #f1f5f9 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 4px;
}

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

.skeleton-text {
    height: 1em;
    margin-bottom: 0.5em;
}

.skeleton-text:last-child {
    width: 80%;
}

.skeleton-circle {
    border-radius: 50%;
}

/* ========== 脉冲效果 ========== */
.pulse {
    animation: pulse 2s var(--ease-in-out) infinite;
}

.pulse-fast {
    animation: pulse 1s var(--ease-in-out) infinite;
}

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

/* ========== 闪烁效果 ========== */
.shimmer {
    position: relative;
    overflow: hidden;
}

.shimmer::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.4),
        transparent
    );
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    100% { left: 200%; }
}

/* ========== 滚动条美化 ========== */
.custom-scrollbar::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.custom-scrollbar::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 4px;
}

.custom-scrollbar::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
    transition: background var(--transition-fast);
}

.custom-scrollbar::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Firefox */
.custom-scrollbar {
    scrollbar-width: thin;
    scrollbar-color: #cbd5e1 #f1f5f9;
}

/* ========== 平滑滚动 ========== */
html {
    scroll-behavior: smooth;
}

/* ========== 焦点样式（无障碍） ========== */
.focus-visible:focus-visible {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
}

.focus-ring:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

/* ========== 减少动画（无障碍） ========== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .page-loading {
        display: none !important;
    }
}

/* ========== 触摸设备优化 ========== */
@media (hover: none) and (pointer: coarse) {
    .hover-lift:hover,
    .hover-scale:hover,
    .card-interactive:hover {
        transform: none;
    }
    
    .hover-lift:active,
    .hover-scale:active,
    .card-interactive:active {
        transform: scale(0.98);
    }
}

/* ========== 打印样式 ========== */
@media print {
    .page-loading,
    .loading-spinner,
    .loading-text {
        display: none !important;
    }
    
    * {
        animation: none !important;
        transition: none !important;
    }
}