/**
 * 动画样式
 * TSF研究所 - ACG文化兴趣部落
 */

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

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* 延迟动画 */
.animate-delay-1 { transition-delay: 0.1s; }
.animate-delay-2 { transition-delay: 0.2s; }
.animate-delay-3 { transition-delay: 0.3s; }
.animate-delay-4 { transition-delay: 0.4s; }
.animate-delay-5 { transition-delay: 0.5s; }

/* 滑入动画 */
.animate-slide-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.animate-slide-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.animate-slide-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.animate-slide-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* 缩放动画 */
.animate-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.6s ease-out,
                transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.animate-scale.visible {
    opacity: 1;
    transform: scale(1);
}

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

.hover-lift {
    transition: transform var(--transition-base),
                box-shadow var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.hover-scale {
    transition: transform var(--transition-base);
}

.hover-scale:hover {
    transform: scale(1.03);
}

.hover-glow {
    transition: box-shadow var(--transition-base);
}

.hover-glow:hover {
    box-shadow: 0 0 30px rgba(255, 107, 107, 0.3);
}

/* ==========================================
   Link Effects
   ========================================== */

.link-underline {
    position: relative;
    text-decoration: none;
}

.link-underline::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-base);
}

.link-underline:hover::after {
    width: 100%;
}

.link-color {
    transition: color var(--transition-fast);
}

.link-color:hover {
    color: var(--color-accent);
}

/* ==========================================
   Background Effects
   ========================================== */

.gradient-shift {
    background-size: 200% 200%;
    animation: gradientShift 8s ease infinite;
}

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

.gradient-border {
    position: relative;
}

.gradient-border::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: inherit;
    padding: 2px;
    background: var(--gradient-accent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.gradient-border:hover::before {
    opacity: 1;
}

/* ==========================================
   Text Effects
   ========================================== */

.text-gradient {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-shimmer {
    background: linear-gradient(
        90deg,
        var(--color-text-primary) 0%,
        var(--color-accent) 50%,
        var(--color-text-primary) 100%
    );
    background-size: 200% 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% { background-position: 0% 0; }
    50% { background-position: 200% 0; }
}

/* ==========================================
   Loading Animations
   ========================================== */

.pulse {
    animation: pulse 2s ease-in-out infinite;
}

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

.bounce {
    animation: bounce 1s ease-in-out infinite;
}

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

.rotate {
    animation: rotate 2s linear infinite;
}

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

/* ==========================================
   Page Transitions
   ========================================== */

.page-transition-enter {
    opacity: 0;
    transform: translateY(20px);
}

.page-transition-enter-active {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.4s ease-out,
                transform 0.4s ease-out;
}

.page-transition-exit {
    opacity: 1;
}

.page-transition-exit-active {
    opacity: 0;
    transition: opacity 0.3s ease-in;
}

/* ==========================================
   Counter Animation
   ========================================== */

.count-up {
    transition: none;
}

.count-up.counting {
    transition: opacity 0.3s ease;
}

.count-up.complete {
    opacity: 1;
}

/* ==========================================
   Image Reveal
   ========================================== */

.img-reveal {
    position: relative;
    overflow: hidden;
}

.img-reveal::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-bg-primary);
    transform-origin: left;
}

.img-reveal.visible::after {
    animation: imgReveal 1s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

@keyframes imgReveal {
    0% { transform-origin: left; transform: scaleX(1); }
    50% { transform-origin: right; transform: scaleX(1); }
    51% { transform-origin: right; transform: scaleX(0); }
    100% { transform-origin: left; transform: scaleX(0); }
}

/* ==========================================
   Morphing Shapes
   ========================================== */

.morph {
    animation: morph 8s ease-in-out infinite;
}

@keyframes morph {
    0%, 100% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; }
    25% { border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%; }
    50% { border-radius: 50% 60% 30% 60% / 30% 60% 70% 40%; }
    75% { border-radius: 60% 40% 60% 30% / 70% 30% 50% 60%; }
}

/* ==========================================
   Parallax Helper
   ========================================== */

.parallax-element {
    will-change: transform;
    transition: transform 0.1s ease-out;
}