/* ========================================
   Beijing Sirenda Trade Co., Ltd.
   Animation Stylesheet
   ======================================== */

/* ========================================
   1. Scroll Animations
   ======================================== */

.animate-on-scroll {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

.animate-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

.animate-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

.animate-scale {
    opacity: 0;
    transform: scale(0.8);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Stagger Animation for Grid Items */
.stagger-item {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.stagger-item.animated {
    opacity: 1;
    transform: translateY(0);
}

.stagger-item:nth-child(1) { transition-delay: 0.1s; }
.stagger-item:nth-child(2) { transition-delay: 0.2s; }
.stagger-item:nth-child(3) { transition-delay: 0.3s; }
.stagger-item:nth-child(4) { transition-delay: 0.4s; }
.stagger-item:nth-child(5) { transition-delay: 0.5s; }
.stagger-item:nth-child(6) { transition-delay: 0.6s; }
.stagger-item:nth-child(7) { transition-delay: 0.7s; }
.stagger-item:nth-child(8) { transition-delay: 0.8s; }

/* ========================================
   2. Button Animations
   ======================================== */

.magnetic-btn {
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.magnetic-btn::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 ease;
}

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

.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, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

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

/* Shine Effect */
.shine {
    position: relative;
    overflow: hidden;
}

.shine::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(
        to right,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
    transform: skewX(-25deg);
    transition: left 0.7s ease;
}

.shine:hover::before {
    left: 150%;
}

/* ========================================
   3. Card Animations
   ======================================== */

.card-hover {
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.card-hover:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.3),
        0 0 30px rgba(233, 69, 96, 0.2);
}

/* Glassmorphism Card */
.glass-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.4s ease;
}

.glass-card:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(233, 69, 96, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

/* ========================================
   4. Text Animations
   ======================================== */

.text-gradient-animate {
    background: linear-gradient(
        90deg,
        #e94560,
        #ff6b6b,
        #e94560
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientFlow 3s ease infinite;
}

@keyframes gradientFlow {
    0% { background-position: 0% center; }
    50% { background-position: 100% center; }
    100% { background-position: 0% center; }
}

.typing-effect {
    overflow: hidden;
    border-right: 2px solid var(--primary-color);
    white-space: nowrap;
    animation: typing 3s steps(30) infinite, blink 0.7s step-end infinite;
}

@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}

@keyframes blink {
    from, to { border-color: transparent; }
    50% { border-color: var(--primary-color); }
}

/* ========================================
   5. Image & Icon Animations
   ======================================== */

.img-zoom {
    overflow: hidden;
}

.img-zoom img,
.img-zoom svg {
    transition: transform 0.6s ease;
}

.img-zoom:hover img,
.img-zoom:hover svg {
    transform: scale(1.1);
}

.icon-spin {
    transition: transform 0.6s ease;
}

.icon-spin:hover {
    transform: rotate(360deg);
}

.icon-bounce {
    transition: transform 0.4s ease;
}

.icon-bounce:hover {
    transform: scale(1.2) translateY(-5px);
}

/* ========================================
   6. Section Background Animations
   ======================================== */

.bg-gradient-animation {
    background: linear-gradient(
        -45deg,
        #1a1a2e,
        #16213e,
        #0f3460,
        #1a1a2e
    );
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}

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

/* Parallax Effect */
.parallax-bg {
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

/* ========================================
   7. Loading Animations
   ======================================== */

.loading-dots::after {
    content: '';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% { content: ''; }
    40% { content: '.'; }
    60% { content: '..'; }
    80%, 100% { content: '...'; }
}

/* Pulse Animation */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.05);
    }
}

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

/* Wave Animation */
@keyframes wave {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(20deg); }
    75% { transform: rotate(-20deg); }
}

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

/* ========================================
   8. Navigation Animations
   ======================================== */

.nav-link-underline {
    position: relative;
}

.nav-link-underline::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

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

/* Mobile Menu Animation */
.mobile-menu {
    transform: translateX(100%);
    transition: transform 0.4s ease-in-out;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu-toggle span {
    transition: all 0.3s ease;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* ========================================
   9. Form Animations
   ======================================== */

.form-input-animate {
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-input-animate:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.2);
}

.form-label-float {
    position: relative;
}

.form-label-float label {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    transition: all 0.3s ease;
    pointer-events: none;
    color: var(--text-secondary);
}

.form-label-float input:focus + label,
.form-label-float input:not(:placeholder-shown) + label,
.form-label-float textarea:focus + label,
.form-label-float textarea:not(:placeholder-shown) + label {
    top: 0;
    font-size: 0.8rem;
    color: var(--primary-color);
}

/* ========================================
   10. Counter Animation
   ======================================== */

.counter {
    display: inline-block;
    font-variant-numeric: tabular-nums;
}

/* ========================================
   11. Hover Effects
   ======================================== */

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

.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.hover-glow {
    transition: box-shadow 0.3s ease;
}

.hover-glow:hover {
    box-shadow: 
        0 0 20px rgba(233, 69, 96, 0.4),
        0 0 40px rgba(233, 69, 96, 0.2);
}

.hover-rotate {
    transition: transform 0.4s ease;
}

.hover-rotate:hover {
    transform: rotate(5deg) scale(1.05);
}

/* ========================================
   12. Reveal Animations
   ======================================== */

.reveal-up {
    clip-path: inset(100% 0 0 0);
    transition: clip-path 0.8s ease-out;
}

.reveal-up.revealed {
    clip-path: inset(0 0 0 0);
}

.reveal-left {
    clip-path: inset(0 100% 0 0);
    transition: clip-path 0.8s ease-out;
}

.reveal-left.revealed {
    clip-path: inset(0 0 0 0);
}

.reveal-scale {
    clip-path: inset(50% 50% 50% 50%);
    transition: clip-path 0.6s ease-out;
}

.reveal-scale.revealed {
    clip-path: inset(0 0 0 0);
}

/* ========================================
   13. Performance Optimizations
   ======================================== */

/* Will-change for smooth animations */
.will-transform {
    will-change: transform;
}

.will-opacity {
    will-change: opacity;
}

.will-change {
    will-change: transform, opacity;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ========================================
   14. Audi-Inspired Animations
   ======================================== */

/* Smooth reveal animation */
.audi-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s cubic-bezier(0.4, 0, 0.2, 1),
                transform 1s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Line animation */
.audi-line {
    position: relative;
    overflow: hidden;
}

.audi-line::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.6s ease;
}

.audi-line:hover::after {
    width: 100%;
}

/* Smooth border animation */
.audi-border {
    position: relative;
}

.audi-border::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border: 2px solid transparent;
    border-radius: inherit;
    transition: border-color 0.4s ease;
}

.audi-border:hover::before {
    border-color: var(--primary-color);
}

/* ========================================
   15. Responsive Animation Adjustments
   ======================================== */

@media (max-width: 768px) {
    .animate-on-scroll,
    .animate-left,
    .animate-right {
        transform: translateY(30px);
    }
    
    .stagger-item {
        transition-delay: 0.05s !important;
    }
}