/* ========================================
   灵动视觉效果增强样式
   流畅过渡、微交互、动态反馈机制
   ======================================== */

/* === 全局动画变量 === */
:root {
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --transition-elastic: 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-xl: 0 12px 48px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(99, 179, 237, 0.5);
    
    --scale-hover: 1.05;
    --scale-active: 0.95;
    --rotate-hover: 3deg;
}
/* === 流畅过渡效果 === */
* {
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

a, button, .nav-item, .card, .tool-item, .game-card {
    transition: all var(--transition-base);
}

/* === 导航栏增强动画 === */
.nav-item {
    position: relative;
    display: inline-block;
    padding: 0.5rem 1rem;
    overflow: hidden;
}

.nav-item::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, #63b3ed, transparent);
    transform: translateX(-50%);
    transition: width var(--transition-base);
}

.nav-item:hover::before {
    width: 100%;
}

.nav-item:hover {
    transform: translateY(-2px);
    text-shadow: 0 2px 8px rgba(99, 179, 237, 0.4);
}

.nav-item:active {
    transform: translateY(0);
}

/* === 按钮涟漪效果 === */
.btn-ripple {
    position: relative;
    overflow: hidden;
}

.btn-ripple::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-out, height 0.6s ease-out, opacity 0.6s ease-out;
}

.btn-ripple:active::after {
    width: 300px;
    height: 300px;
    opacity: 0;
}

/* === 按钮交互效果 === */
button, .button, .btn {
    position: relative;
    transform: translateZ(0);
    backface-visibility: hidden;
}

button:hover, .button:hover, .btn:hover {
    transform: translateY(-2px) scale(var(--scale-hover));
    box-shadow: var(--shadow-md);
}

button:active, .button:active, .btn:active {
    transform: translateY(0) scale(var(--scale-active));
    box-shadow: var(--shadow-sm);
}

/* === 设置按钮特殊效果 === */
.settings-btn {
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 5px rgba(99, 179, 237, 0.3);
    }
    50% {
        box-shadow: 0 0 15px rgba(99, 179, 237, 0.6);
    }
}

/* === 下拉菜单动画 === */
.settings-dropdown-content {
    transform-origin: top right;
    animation: dropdown-slide 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes dropdown-slide {
    from {
        opacity: 0;
        transform: scale(0.8) rotate(-5deg);
    }
    to {
        opacity: 1;
        transform: scale(1) rotate(0);
    }
}

/* === 卡片悬浮效果 === */
.card, .tool-item, .game-card {
    position: relative;
    overflow: hidden;
    transform: translateZ(0);
    backface-visibility: hidden;
}

.card::before, .tool-item::before, .game-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
    transition: left var(--transition-slow);
}

.card:hover::before, .tool-item:hover::before, .game-card:hover::before {
    left: 100%;
}

.card:hover, .tool-item:hover, .game-card:hover {
    transform: translateY(-8px) scale(var(--scale-hover));
    box-shadow: var(--shadow-xl);
}

/* === 卡片光晕效果 === */
.card-glow {
    position: relative;
}

.card-glow::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(
        circle,
        rgba(99, 179, 237, 0.1) 0%,
        transparent 70%
    );
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.card-glow:hover::after {
    opacity: 1;
    animation: rotate-glow 3s linear infinite;
}

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


/* === 输入框动画 === */
input, textarea, select {
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

input:focus, textarea:focus, select:focus {
    transform: scale(1.02);
    box-shadow: var(--shadow-glow);
    border-color: #63b3ed;
}

/* === 搜索框特殊效果 === */
.search-container #searchInput:focus {
    width: 280px;
    background: rgba(255, 255, 255, 0.25);
    box-shadow: 0 0 20px rgba(99, 179, 237, 0.4);
}

.search-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

/* === 滚动动画类 === */
.scroll-reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.scroll-reveal-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.scroll-reveal-left.active {
    opacity: 1;
    transform: translateX(0);
}

.scroll-reveal-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.scroll-reveal-right.active {
    opacity: 1;
    transform: translateX(0);
}

.scroll-reveal-scale {
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* === 弹性弹跳效果 === */
.bounce-in {
    animation: bounce-in 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

/* === 浮动动画 === */
.float {
    animation: float 3s ease-in-out infinite;
}

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


/* === 微交互反馈 === */
.click-feedback {
    animation: click-scale 0.15s ease-out;
}

@keyframes click-scale {
    0% { transform: scale(1); }
    50% { transform: scale(0.95); }
    100% { transform: scale(1); }
}

/* === 成功/错误反馈动画 === */
.success-feedback {
    animation: success-bounce 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes success-bounce {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.error-feedback {
    animation: error-shake 0.4s ease-in-out;
}

@keyframes error-shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

/* === 性能优化 === */
.will-animate {
    will-change: transform, opacity;
}

/* === 响应式动画调整 === */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (max-width: 768px) {
    .card:hover, .tool-item:hover, .game-card:hover {
        transform: translateY(-4px) scale(1.02);
    }
    
    .nav-item:hover {
        transform: translateY(-1px);
    }
}