/**
 * Animaciones CSS Avanzadas
 * Plum Animation Fest
 */

/* ==========================================================================
   Keyframes
   ========================================================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

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

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

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

.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Delays para animaciones secuenciales */
.scroll-animate:nth-child(1) { transition-delay: 0s; }
.scroll-animate:nth-child(2) { transition-delay: 0.1s; }
.scroll-animate:nth-child(3) { transition-delay: 0.2s; }
.scroll-animate:nth-child(4) { transition-delay: 0.3s; }
.scroll-animate:nth-child(5) { transition-delay: 0.4s; }

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

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

.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

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

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

.hover-glow {
    position: relative;
    transition: all 0.3s ease;
}

.hover-glow::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle, var(--color-gold) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.hover-glow:hover::before {
    opacity: 0.3;
}

.hover-underline {
    position: relative;
}

.hover-underline::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-gold);
    transition: width 0.3s ease;
}

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

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

.skeleton {
    background: linear-gradient(
        90deg,
        #2d2d2d 0%,
        #3d3d3d 50%,
        #2d2d2d 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

.spinner {
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: rotate 1s linear infinite;
}

/* ==========================================================================
   Card Animations
   ========================================================================== */

.card {
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(253, 55, 94, 0.15);
}

.card-grid .card {
    animation: fadeInUp 0.6s ease-out forwards;
    opacity: 0;
}

.card-grid .card:nth-child(1) { animation-delay: 0.1s; }
.card-grid .card:nth-child(2) { animation-delay: 0.2s; }
.card-grid .card:nth-child(3) { animation-delay: 0.3s; }
.card-grid .card:nth-child(4) { animation-delay: 0.4s; }
.card-grid .card:nth-child(5) { animation-delay: 0.5s; }
.card-grid .card:nth-child(6) { animation-delay: 0.6s; }

/* ==========================================================================
   Image Animations
   ========================================================================== */

img {
    opacity: 0;
    transition: opacity 0.4s ease;
}

img.loaded {
    opacity: 1;
}

.hero-image {
    overflow: hidden;
}

.hero-image img {
    transition: transform 0.5s ease;
}

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

/* ==========================================================================
   Button Animations
   ========================================================================== */

.btn {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

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

/* ==========================================================================
   Text Animations
   ========================================================================== */

.stroke-text {
    background: linear-gradient(
        to right,
        var(--color-white),
        var(--color-gold),
        var(--color-white)
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 3s linear infinite;
}

/* ==========================================================================
   Back to Top Button
   ========================================================================== */

.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: var(--color-gold);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 9998;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-secondary);
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.back-to-top svg {
    stroke: white;
}

/* ==========================================================================
   Mobile Menu Animation
   ========================================================================== */

.main-menu {
    transition: right 0.3s ease;
}

.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);
}

/* ==========================================================================
   Performance: Reduce motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Reducir animaciones en dispositivos de baja potencia */
body.reduce-animations * {
    animation: none !important;
    transition: none !important;
}

/* ==========================================================================
   Loading Page Animation
   ========================================================================== */

body {
    opacity: 0;
    transition: opacity 0.3s ease;
}

body.loaded {
    opacity: 1;
}

/* ==========================================================================
   Section Specific Animations
   ========================================================================== */

.festival-section {
    padding: 100px 0;
}

.why-plum-section {
    background: var(--color-primary);
    padding: 80px 0;
    margin: 60px 0;
}

.competencias-section {
    padding: 100px 0;
}

.sponsors-section {
    padding: 80px 0;
    background: var(--color-border);
}

/* Sponsors Grid Animation */
.sponsors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 40px;
    align-items: center;
    margin-top: 60px;
}

.sponsor-item {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    animation: fadeInUp 0.6s ease-out forwards;
}

.sponsor-item:nth-child(1) { animation-delay: 0.1s; }
.sponsor-item:nth-child(2) { animation-delay: 0.2s; }
.sponsor-item:nth-child(3) { animation-delay: 0.3s; }
.sponsor-item:nth-child(4) { animation-delay: 0.4s; }

.sponsor-item img {
    max-width: 160px;
    height: auto;
    filter: grayscale(100%);
    opacity: 0.7;
    transition: all 0.3s ease;
}

.sponsor-item:hover img {
    filter: grayscale(0%);
    opacity: 1;
    transform: scale(1.1);
}