/* ============================================
   OJ System - 全局动画和特效库
   ============================================ */

/* ========== Keyframe Animations ========== */

/* 淡入动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* 从上淡入 */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 从下淡入 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 从左淡入 */
@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 从右淡入 */
@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 缩放淡入 */
@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* 弹跳进入 */
@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        transform: scale(1);
    }
}

/* 滑入 */
@keyframes slideInUp {
    from {
        transform: translateY(100%);
    }
    to {
        transform: translateY(0);
    }
}

/* 旋转进入 */
@keyframes rotateIn {
    from {
        opacity: 0;
        transform: rotate(-200deg);
    }
    to {
        opacity: 1;
        transform: rotate(0);
    }
}

/* 脉冲动画 */
@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

/* 摇晃动画 */
@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    10%, 30%, 50%, 70%, 90% {
        transform: translateX(-10px);
    }
    20%, 40%, 60%, 80% {
        transform: translateX(10px);
    }
}

/* 闪烁动画 */
@keyframes flash {
    0%, 50%, 100% {
        opacity: 1;
    }
    25%, 75% {
        opacity: 0;
    }
}

/* 渐变背景动画 */
@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* 加载旋转 */
@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* 波纹效果 */
@keyframes ripple {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(4);
        opacity: 0;
    }
}

/* 浮动动画 */
@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* 闪光扫过效果 */
@keyframes shine {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* 心跳动画 */
@keyframes heartbeat {
    0%, 100% {
        transform: scale(1);
    }
    10%, 30% {
        transform: scale(0.9);
    }
    20%, 40% {
        transform: scale(1.1);
    }
}

/* ========== Animation Utility Classes ========== */

/* 淡入效果 */
.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

.animate-fade-in-down {
    animation: fadeInDown 0.6s ease-out;
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-fade-in-left {
    animation: fadeInLeft 0.6s ease-out;
}

.animate-fade-in-right {
    animation: fadeInRight 0.6s ease-out;
}

/* 缩放效果 */
.animate-scale-in {
    animation: scaleIn 0.5s ease-out;
}

.animate-bounce-in {
    animation: bounceIn 0.8s ease-out;
}

/* 滑动效果 */
.animate-slide-in-up {
    animation: slideInUp 0.5s ease-out;
}

/* 旋转效果 */
.animate-rotate-in {
    animation: rotateIn 0.6s ease-out;
}

/* 持续动画 */
.animate-pulse {
    animation: pulse 2s infinite;
}

.animate-shake {
    animation: shake 0.5s;
}

.animate-flash {
    animation: flash 1s;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

.animate-spin {
    animation: spin 1s linear infinite;
}

.animate-heartbeat {
    animation: heartbeat 1.5s ease-in-out infinite;
}

/* ========== Hover Effects ========== */

/* 卡片hover效果 */
.hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

/* 轻微抬起 */
.hover-lift-sm {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.hover-lift-sm:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

/* 缩放hover */
.hover-scale {
    transition: transform 0.3s ease;
}

.hover-scale:hover {
    transform: scale(1.05);
}

.hover-scale-sm {
    transition: transform 0.2s ease;
}

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

/* 发光效果 */
.hover-glow {
    transition: box-shadow 0.3s ease;
}

.hover-glow:hover {
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.5);
}

/* 渐变背景hover */
.hover-gradient {
    background-size: 200% auto;
    transition: background-position 0.5s ease;
}

.hover-gradient:hover {
    background-position: right center;
}

/* 边框动画 */
.hover-border {
    position: relative;
    transition: all 0.3s ease;
}

.hover-border::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.hover-border:hover::after {
    width: 100%;
}

/* 闪光扫过效果 */
.hover-shine {
    position: relative;
    overflow: hidden;
}

.hover-shine::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.hover-shine:hover::before {
    left: 100%;
}

/* ========== Loading States ========== */

.loading {
    pointer-events: none;
    opacity: 0.6;
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #667eea;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* 骨架屏动画 */
.skeleton {
    background: linear-gradient(90deg,
        var(--bg-tertiary) 25%,
        var(--bg-secondary) 50%,
        var(--bg-tertiary) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

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

/* ========== Transition Classes ========== */

.transition-all {
    transition: all 0.3s ease;
}

.transition-fast {
    transition: all 0.15s ease;
}

.transition-slow {
    transition: all 0.5s ease;
}

.transition-transform {
    transition: transform 0.3s ease;
}

.transition-opacity {
    transition: opacity 0.3s ease;
}

.transition-colors {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* ========== Scroll Animations ========== */

/* 滚动时淡入 */
.scroll-fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scroll-fade-in.active {
    opacity: 1;
    transform: translateY(0);
}

/* 交错动画延迟 */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }
.stagger-6 { animation-delay: 0.6s; }

/* ========== Special Effects ========== */

/* 玻璃态效果 */
.glass-effect {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] .glass-effect {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 渐变边框 */
.gradient-border {
    position: relative;
    background: var(--bg-card);
    border-radius: 12px;
}

.gradient-border::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 12px;
    padding: 2px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-mask:
        linear-gradient(#fff 0 0) content-box,
        linear-gradient(#fff 0 0);
    mask:
        linear-gradient(#fff 0 0) content-box,
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
}

/* 霓虹发光 */
.neon-glow {
    text-shadow: 0 0 10px rgba(102, 126, 234, 0.8),
                 0 0 20px rgba(102, 126, 234, 0.6),
                 0 0 30px rgba(102, 126, 234, 0.4);
}

/* 波纹按钮效果 */
.ripple-effect {
    position: relative;
    overflow: hidden;
}

.ripple-effect::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.ripple-effect:active::after {
    width: 300px;
    height: 300px;
}

/* ========== Page Transition ========== */

.page-transition {
    animation: fadeInUp 0.5s ease-out;
}

/* ========== Accessibility ========== */

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