/* VoidWander 动画工具类 - 基于 AnimationInteractionDesigner 的建议 */

/* ==================== 基础动画 ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

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

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-4px); }
    75% { transform: translateX(4px); }
}

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

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

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

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* ==================== 页面入场动画 ==================== */
.animate-in {
    animation: fadeInUp 0.5s ease-out forwards;
    opacity: 0;
}

/* 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; }

/* 骨架屏动画 */
.skeleton {
    background: linear-gradient(90deg, 
        rgba(255,255,255,0.05) 25%, 
        rgba(255,255,255,0.1) 50%, 
        rgba(255,255,255,0.05) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
}

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

/* ==================== 交互动效 ==================== */

/* 按钮悬停 */
.btn {
    transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn:hover {
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0) scale(0.98);
}

/* 按钮波纹效果 */
.btn-ripple {
    position: relative;
    overflow: hidden;
}

.btn-ripple::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    top: 50%;
    left: 50%;
    background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
    transform: translate(-50%, -50%) scale(0);
    opacity: 0;
    transition: transform 0.3s, opacity 0.1s;
}

.btn-ripple:active::after {
    transform: translate(-50%, -50%) scale(2);
    opacity: 1;
}

/* 卡片悬停 */
.card-hover {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-hover:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* 输入框动画 */
.input {
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.input:focus {
    border-color: var(--color-primary, #3b82f6);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* 输入框验证状态 */
.input-valid {
    border-color: #22c55e !important;
    box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2) !important;
}

.input-invalid {
    border-color: #ef4444 !important;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2) !important;
    animation: shake 0.3s ease;
}

/* ==================== 下拉菜单动画 ==================== */
.dropdown-menu {
    opacity: 0;
    transform: translateY(-8px) scale(0.95);
    transform-origin: top center;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
}

.dropdown-menu.show {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

/* ==================== 模态框动画 ==================== */
.modal-backdrop {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal-backdrop.show {
    opacity: 1;
}

.modal-content {
    opacity: 0;
    transform: scale(0.95) translateY(20px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-content.show {
    opacity: 1;
    transform: scale(1) translateY(0);
}

/* ==================== 折叠面板 ==================== */
.collapse-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.collapse-content.expanded {
    max-height: 500px;
}

/* ==================== Toast 提示 ==================== */
.toast-notification {
    position: fixed;
    bottom: 24px;
    right: 24px;
    padding: 12px 20px;
    border-radius: 12px;
    background: #1a1a24;
    color: white;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    z-index: 9999;
    transform: translateY(20px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.toast-notification.show {
    transform: translateY(0);
    opacity: 1;
}

.toast-success { border-left: 4px solid #22c55e; }
.toast-error { border-left: 4px solid #ef4444; }
.toast-warning { border-left: 4px solid #f59e0b; }
.toast-info { border-left: 4px solid #3b82f6; }

/* ==================== 进度条动画 ==================== */
.progress-bar {
    transition: width 0.5s ease-out;
}

/* 进度数字滚动 */
.progress-number {
    font-variant-numeric: tabular-nums;
}

/* 闪光效果 */
.progress-shine {
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255,255,255,0.3), 
        transparent);
    background-size: 200% 100%;
    animation: shimmer 2s infinite;
}

/* ==================== 页面切换 ==================== */
.page-container {
    animation: fadeInUp 0.4s ease-out;
}

.page-exit {
    animation: fadeInUp 0.3s ease-in reverse;
}

/* ==================== 滚动动画 ==================== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* ==================== 性能优化 ==================== */

/* 使用 will-change 优化复杂动画 */
.graph-node {
    will-change: transform;
}

.progress-bar {
    will-change: width;
}

/* 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;
    }
}

/* ==================== 加载状态 ==================== */
.btn-loading {
    pointer-events: none;
    opacity: 0.7;
}

.btn-loading::after {
    content: '';
    display: inline-block;
    width: 16px;
    height: 16px;
    margin-left: 8px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* ==================== 闪光按钮 ==================== */
.btn-shine {
    position: relative;
    overflow: hidden;
}

.btn-shine::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255,255,255,0.2), 
        transparent);
    transition: left 0.5s;
}

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

/* ==================== 浮动动画 ==================== */
@keyframes floatIn {
    0% {
        opacity: 0;
        transform: translateY(20px) scale(0.9);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.float-in {
    animation: floatIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* 错开浮动入 */
.float-in-delay-1 { animation-delay: 0.1s; opacity: 0; }
.float-in-delay-2 { animation-delay: 0.2s; opacity: 0; }
.float-in-delay-3 { animation-delay: 0.3s; opacity: 0; }
.float-in-delay-4 { animation-delay: 0.4s; opacity: 0; }
.float-in-delay-5 { animation-delay: 0.5s; opacity: 0; }
/* 庆祝动画 */
.confetti-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    overflow: hidden;
}

.confetti {
    position: absolute;
    top: -10px;
    width: 10px;
    height: 10px;
    border-radius: 2px;
    animation: confetti-fall 3s ease-out forwards;
}

@keyframes confetti-fall {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) rotate(720deg);
        opacity: 0;
    }
}

/* 研究完成状态 */
.research-complete .progress-bar {
    animation: progress-complete-pulse 0.5s ease;
}

@keyframes progress-complete-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

/* 加载旋转器 */
.loading-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-right: 8px;
}

/* Toast 图标 */
.toast-icon {
    margin-right: 8px;
    font-size: 16px;
}

.toast-message {
    flex: 1;
}