/*
 * Nordic Design - 增强版页面过渡和动画系统
 * 设计理念：优雅、流畅、有意义的动画
 * 符合北欧极简主义：Less is More, 每个动画都有目的
 */

/* ============================================
   1. 核心页面过渡动画
   ============================================ */

/* 页面加载淡入 */
@keyframes pageEnter {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 页面退出淡出 */
@keyframes pageExit {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-20px);
    }
}

/* 应用到body */
body {
    animation: pageEnter 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

body.page-transitioning {
    animation: pageExit 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* ============================================
   2. 导航栏动画增强
   ============================================ */

/* 导航栏从顶部滑入 */
.navbar-nordic {
    animation: slideInFromTop 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideInFromTop {
    from {
        opacity: 0;
        transform: translateY(-100%);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 导航链接下划线动画 */
.navbar-nordic-link {
    position: relative;
    overflow: hidden;
}

.navbar-nordic-link::before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--nordic-blue), var(--nordic-yellow));
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.navbar-nordic-link:hover::before,
.navbar-nordic-link.active::before {
    transform: translateX(0);
}

/* Logo脉冲动画 */
.navbar-nordic-logo {
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.navbar-nordic-logo:hover {
    transform: scale(1.05);
    animation: gentlePulse 2s ease-in-out infinite;
}

@keyframes gentlePulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.85;
    }
}

/* 用户头像悬停效果 */
.user-avatar {
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.user-avatar::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 0.5s ease, height 0.5s ease;
}

.user-avatar:hover::before {
    width: 120%;
    height: 120%;
}

/* ============================================
   3. 卡片动画增强
   ============================================ */

/* 卡片交错进入动画 */
.card-nordic,
.card-nordic-flat,
.card-nordic-outlined {
    opacity: 0;
    animation: cardEnter 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes cardEnter {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* 为卡片添加交错延迟 */
.card-nordic:nth-child(1) { animation-delay: 0.1s; }
.card-nordic:nth-child(2) { animation-delay: 0.2s; }
.card-nordic:nth-child(3) { animation-delay: 0.3s; }
.card-nordic:nth-child(4) { animation-delay: 0.4s; }
.card-nordic:nth-child(5) { animation-delay: 0.5s; }
.card-nordic:nth-child(6) { animation-delay: 0.6s; }

/* 卡片悬停提升效果 - 增强版 */
.card-nordic {
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
}

.card-nordic::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 79, 147, 0.03), rgba(255, 218, 26, 0.03));
    opacity: 0;
    border-radius: inherit;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.card-nordic:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 79, 147, 0.12);
}

.card-nordic:hover::after {
    opacity: 1;
}

/* ============================================
   4. 按钮动画增强
   ============================================ */

/* 按钮涟漪效果 */
.btn-nordic,
.btn-nordic-primary,
.btn-nordic-secondary,
.btn-nordic-accent,
.btn-nordic-ghost {
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-nordic::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

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

/* 主要按钮悬停效果 */
.btn-nordic-primary {
    background: linear-gradient(135deg, var(--nordic-blue) 0%, #003D75 100%);
    background-size: 200% 100%;
    background-position: left;
}

.btn-nordic-primary:hover {
    background-position: right;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 79, 147, 0.3);
}

/* 强调按钮悬停效果 */
.btn-nordic-accent {
    background: linear-gradient(135deg, var(--nordic-yellow) 0%, #F5C800 100%);
    background-size: 200% 100%;
    background-position: left;
}

.btn-nordic-accent:hover {
    background-position: right;
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 8px 24px rgba(255, 218, 26, 0.4);
}

/* 次要按钮边框动画 */
.btn-nordic-secondary {
    position: relative;
}

.btn-nordic-secondary::after {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    background: linear-gradient(135deg, var(--nordic-blue), var(--nordic-ocean));
    opacity: 0;
    z-index: -1;
    transition: opacity 0.3s ease;
}

.btn-nordic-secondary:hover::after {
    opacity: 1;
}

/* ============================================
   5. 表单输入动画
   ============================================ */

/* 输入框聚焦动画 */
.input-nordic {
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
}

.input-nordic:focus {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 79, 147, 0.12);
}

/* 输入框标签浮动动画 */
.form-group-nordic {
    position: relative;
}

.form-group-nordic .label-floating {
    position: absolute;
    top: 50%;
    left: 16px;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.form-group-nordic .input-nordic:focus + .label-floating,
.form-group-nordic .input-nordic:not(:placeholder-shown) + .label-floating {
    top: -8px;
    left: 12px;
    font-size: 12px;
    color: var(--nordic-blue);
    background: var(--bg-elevated);
    padding: 0 6px;
}

/* ============================================
   6. 模态框和弹窗动画
   ============================================ */

/* 模态框背景淡入 */
.modal-nordic-backdrop {
    animation: backdropFadeIn 0.3s ease;
}

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

/* 模态框缩放进入 */
.modal-nordic {
    animation: modalScaleIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalScaleIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* 模态框退出动画 */
.modal-nordic-backdrop.closing {
    animation: backdropFadeOut 0.3s ease forwards;
}

.modal-nordic.closing {
    animation: modalScaleOut 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

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

@keyframes modalScaleOut {
    to {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
}

/* ============================================
   7. Toast通知动画
   ============================================ */

/* Toast从右侧滑入 */
.toast-nordic {
    animation: toastSlideIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateX(100%) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

/* Toast退出动画 */
.toast-nordic.closing {
    animation: toastSlideOut 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes toastSlideOut {
    to {
        opacity: 0;
        transform: translateX(100%) scale(0.9);
    }
}

/* ============================================
   8. 下拉菜单动画
   ============================================ */

/* 下拉菜单展开动画 */
.user-dropdown {
    transform-origin: top right;
    animation: dropdownExpand 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes dropdownExpand {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* 下拉菜单项悬停 */
.user-dropdown-item {
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
}

.user-dropdown-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 3px;
    height: 0;
    background: linear-gradient(180deg, var(--nordic-blue), var(--nordic-ocean));
    transform: translateY(-50%);
    transition: height 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    border-radius: 0 2px 2px 0;
}

.user-dropdown-item:hover::before {
    height: 80%;
}

.user-dropdown-item:hover {
    padding-left: calc(var(--spacing-md) + 6px);
}

/* ============================================
   9. 表格行动画
   ============================================ */

/* 表格行交错淡入 */
.table-nordic tbody tr {
    opacity: 0;
    animation: tableRowFadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes tableRowFadeIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.table-nordic tbody tr:nth-child(1) { animation-delay: 0.05s; }
.table-nordic tbody tr:nth-child(2) { animation-delay: 0.1s; }
.table-nordic tbody tr:nth-child(3) { animation-delay: 0.15s; }
.table-nordic tbody tr:nth-child(4) { animation-delay: 0.2s; }
.table-nordic tbody tr:nth-child(5) { animation-delay: 0.25s; }
.table-nordic tbody tr:nth-child(6) { animation-delay: 0.3s; }
.table-nordic tbody tr:nth-child(7) { animation-delay: 0.35s; }
.table-nordic tbody tr:nth-child(8) { animation-delay: 0.4s; }

/* 表格行悬停效果 */
.table-nordic tbody tr {
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
}

.table-nordic tbody tr::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--nordic-blue), var(--nordic-yellow));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.table-nordic tbody tr:hover {
    background: linear-gradient(90deg, rgba(0, 79, 147, 0.04), transparent);
    transform: translateX(8px);
}

.table-nordic tbody tr:hover::before {
    opacity: 1;
}

/* ============================================
   10. 徽章和标签动画
   ============================================ */

/* 徽章脉冲动画 */
.badge-nordic {
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.badge-nordic:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 79, 147, 0.2);
}

/* 徽章闪烁效果（用于新通知） */
@keyframes badgePulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

.badge-nordic.new {
    animation: badgePulse 2s ease-in-out infinite;
}

/* ============================================
   11. 进度条动画
   ============================================ */

/* 进度条填充动画 */
.progress-nordic-bar {
    transition: width 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
}

/* 进度条光泽效果 */
.progress-nordic-bar::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: progressShine 2s infinite;
}

@keyframes progressShine {
    to {
        left: 200%;
    }
}

/* ============================================
   12. 加载状态动画
   ============================================ */

/* 旋转加载器 */
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-light);
    border-top-color: var(--nordic-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* 脉冲加载器 */
.loading-pulse {
    display: inline-flex;
    gap: 8px;
}

.loading-pulse span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--nordic-blue);
    animation: pulse 1.4s ease-in-out infinite;
}

.loading-pulse span:nth-child(1) { animation-delay: 0s; }
.loading-pulse span:nth-child(2) { animation-delay: 0.2s; }
.loading-pulse span:nth-child(3) { animation-delay: 0.4s; }

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(0.5);
        opacity: 0.5;
    }
}

/* 骨架屏动画 */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--nordic-light-gray) 25%,
        var(--nordic-gray) 50%,
        var(--nordic-light-gray) 75%
    );
    background-size: 200% 100%;
    animation: skeletonLoading 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

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

/* ============================================
   13. 滚动触发动画
   ============================================ */

/* 从下方淡入 */
.scroll-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* 从左侧滑入 */
.scroll-slide-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.scroll-slide-left.revealed {
    opacity: 1;
    transform: translateX(0);
}

/* 从右侧滑入 */
.scroll-slide-right {
    opacity: 0;
    transform: translateX(40px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.scroll-slide-right.revealed {
    opacity: 1;
    transform: translateX(0);
}

/* 缩放淡入 */
.scroll-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.scroll-scale.revealed {
    opacity: 1;
    transform: scale(1);
}

/* ============================================
   14. Hero区域动画
   ============================================ */

/* Hero标题动画 */
.page-hero-title {
    opacity: 0;
    animation: heroTitleEnter 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.2s forwards;
}

@keyframes heroTitleEnter {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Hero副标题动画 */
.page-hero-subtitle {
    opacity: 0;
    animation: heroSubtitleEnter 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.4s forwards;
}

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

/* ============================================
   15. 特殊效果
   ============================================ */

/* 渐变文字动画 */
.gradient-text {
    background: linear-gradient(135deg, var(--nordic-blue), var(--nordic-ocean), var(--nordic-sage));
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 3s ease infinite;
}

@keyframes gradientShift {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

/* 光泽扫过效果 */
.shine-effect {
    position: relative;
    overflow: hidden;
}

.shine-effect::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shine 3s infinite;
}

@keyframes shine {
    to {
        left: 200%;
    }
}

/* 浮动动画 */
.float-animation {
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* ============================================
   16. 响应式动画优化
   ============================================ */

/* 移动端优化 - 简化动画 */
@media (max-width: 768px) {
    .card-nordic:hover {
        transform: translateY(-4px) scale(1.01);
    }

    .table-nordic tbody tr:hover {
        transform: translateX(4px);
    }

    /* 移动端禁用某些动画以提升性能 */
    .float-animation {
        animation: none;
    }

    .progress-nordic-bar::before {
        animation: none;
    }
}

/* 尊重用户的减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================
   17. 实用动画类
   ============================================ */

/* 淡入效果类 */
.animate-fade-in {
    animation: fadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* 滑入效果类 */
.animate-slide-up {
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* 缩放效果类 */
.animate-scale {
    animation: scaleIn 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* 旋转效果类 */
.animate-rotate {
    animation: rotateIn 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes rotateIn {
    from {
        opacity: 0;
        transform: rotate(-10deg) scale(0.9);
    }
    to {
        opacity: 1;
        transform: rotate(0) scale(1);
    }
}

/* 延迟类 */
.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; }
.delay-600 { animation-delay: 0.6s; }
.delay-700 { animation-delay: 0.7s; }
.delay-800 { animation-delay: 0.8s; }

/* ============================================
   18. 性能优化
   ============================================ */

/* 使用will-change优化动画性能 */
.card-nordic,
.btn-nordic,
.modal-nordic {
    will-change: transform;
}

/* 使用GPU加速 */
.card-nordic:hover,
.btn-nordic:hover,
.table-nordic tbody tr:hover {
    transform: translateZ(0);
}