/* ========================================
   CHRISTMAS EFFECTS - Elegant & Festive
   Nieve, Regalos, Bolas, Destellos
   ======================================== */

#christmas-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
    overflow: hidden;
}

/* ============ BASE ELEMENT STYLES ============ */

.christmas-element {
    position: absolute;
    top: 80px;
    user-select: none;
    pointer-events: none;
    opacity: 0;
    width: 50px;
    height: 50px;
    background-size: 400% 400%;
    background-repeat: no-repeat;
    image-rendering: crisp-edges;
    image-rendering: -webkit-optimize-contrast;
    will-change: transform, opacity;
}

/* ============ SNOWFLAKES ❄️ ============ */

.snowflake {
    color: #fff;
    font-size: 1em;
    animation: fall linear infinite;
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.5);
}

@keyframes fall {
    0% {
        opacity: 0.9;
        transform: translateY(0) translateX(0) rotate(0deg);
    }

    25% {
        opacity: 0.9;
        transform: translateY(25vh) translateX(calc(var(--drift) * 0.25)) rotate(90deg);
    }

    50% {
        opacity: 0.9;
        transform: translateY(50vh) translateX(calc(var(--drift) * 0.5)) rotate(180deg);
    }

    75% {
        opacity: 0.9;
        transform: translateY(75vh) translateX(calc(var(--drift) * 0.75)) rotate(270deg);
    }

    100% {
        opacity: 0;
        transform: translateY(100vh) translateX(var(--drift)) rotate(360deg);
    }
}

/* ============ GIFTS 🎁 ============ */

.gift {
    font-size: 1.2em;
    animation: fallGift linear infinite;
    filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.4));
}

@keyframes fallGift {
    0% {
        opacity: 0.85;
        transform: translateY(0) translateX(0) rotate(0deg) scale(1);
    }

    25% {
        opacity: 0.85;
        transform: translateY(25vh) translateX(calc(var(--drift) * 0.25)) rotate(180deg) scale(1);
    }

    50% {
        opacity: 0.85;
        transform: translateY(50vh) translateX(calc(var(--drift) * 0.5)) rotate(360deg) scale(1.05);
    }

    75% {
        opacity: 0.85;
        transform: translateY(75vh) translateX(calc(var(--drift) * 0.75)) rotate(540deg) scale(0.95);
    }

    100% {
        opacity: 0;
        transform: translateY(100vh) translateX(var(--drift)) rotate(720deg) scale(0.8);
    }
}

/* ============ CHRISTMAS BALLS 🔴 ============ */

.ornament {
    font-size: 1em;
    animation: fallOrnament linear infinite;
    filter: drop-shadow(0 0 6px rgba(255, 0, 0, 0.3));
}

@keyframes fallOrnament {
    0% {
        opacity: 0.9;
        transform: translateY(0) translateX(0) rotate(0deg) scale(1);
    }

    25% {
        opacity: 0.9;
        transform: translateY(25vh) translateX(calc(var(--drift) * 0.25)) rotate(90deg) scale(1.05);
    }

    50% {
        opacity: 0.9;
        transform: translateY(50vh) translateX(calc(var(--drift) * 0.5)) rotate(180deg) scale(1.1);
    }

    75% {
        opacity: 0.9;
        transform: translateY(75vh) translateX(calc(var(--drift) * 0.75)) rotate(270deg) scale(1);
    }

    100% {
        opacity: 0;
        transform: translateY(100vh) translateX(var(--drift)) rotate(360deg) scale(0.9);
    }
}

/* ============ SPARKLES ✨ ============ */

.sparkle {
    font-size: 0.8em;
    animation: sparkleFloat linear infinite;
    filter: drop-shadow(0 0 10px rgba(255, 215, 0, 0.6));
}

@keyframes sparkleFloat {
    0% {
        opacity: 0.85;
        transform: translateY(0) translateX(0) scale(1) rotate(0deg);
    }

    25% {
        opacity: 0.85;
        transform: translateY(25vh) translateX(calc(var(--drift) * 0.25)) scale(0.9) rotate(180deg);
    }

    50% {
        opacity: 0.85;
        transform: translateY(50vh) translateX(calc(var(--drift) * 0.5)) scale(1.1) rotate(360deg);
    }

    75% {
        opacity: 0.8;
        transform: translateY(75vh) translateX(calc(var(--drift) * 0.75)) scale(0.95) rotate(540deg);
    }

    100% {
        opacity: 0;
        transform: translateY(100vh) translateX(var(--drift)) scale(0.8) rotate(720deg);
    }
}

/* ============ SIZE VARIATIONS ============ */

.christmas-element.small {
    width: 30px;
    height: 30px;
}

.christmas-element.medium {
    width: 45px;
    height: 45px;
}

.christmas-element.large {
    width: 60px;
    height: 60px;
}

/* Gifts específicamente más grandes */
.gift.large {
    width: 70px;
    height: 70px;
}

/* ============ OPACITY VARIATIONS ============ */

.christmas-element.light {
    opacity: 0.75;
}

.christmas-element.lighter {
    opacity: 0.65;
}

/* ============ GOLDEN SPARKLE CORNERS ============ */

.corner-sparkle {
    position: fixed;
    width: 50px;
    height: 50px;
    pointer-events: none;
    animation: twinkleStar 3s ease-in-out infinite;
    z-index: 9998;
    filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.8));
    background-size: 400% 400%;
    background-repeat: no-repeat;
    image-rendering: crisp-edges;
    image-rendering: -webkit-optimize-contrast;
}

.corner-sparkle.top-left {
    top: 20px;
    left: 20px;
}

.corner-sparkle.top-right {
    top: 20px;
    right: 20px;
}

.corner-sparkle.bottom-left {
    bottom: 80px;
    left: 20px;
}

.corner-sparkle.bottom-right {
    bottom: 80px;
    right: 20px;
}

@keyframes twinkleStar {

    0%,
    100% {
        opacity: 0.3;
        transform: scale(1) rotate(0deg);
    }

    50% {
        opacity: 1;
        transform: scale(1.2) rotate(180deg);
    }
}

/* ============ MOBILE OPTIMIZATIONS ============ */

@media (max-width: 768px) {
    .corner-sparkle {
        width: 40px;
        height: 40px;
    }

    .corner-sparkle.top-left {
        top: 10px;
        left: 10px;
    }

    .corner-sparkle.top-right {
        top: 10px;
        right: 10px;
    }

    .corner-sparkle.bottom-left {
        bottom: 60px;
        left: 10px;
    }

    .corner-sparkle.bottom-right {
        bottom: 60px;
        right: 10px;
    }
    
    .christmas-element.small {
        width: 25px;
        height: 25px;
    }

    .christmas-element.medium {
        width: 35px;
        height: 35px;
    }

    .christmas-element.large {
        width: 45px;
        height: 45px;
    }
}

/* Desactivar elementos pesados en móviles muy pequeños */
@media (max-width: 480px) and (max-height: 600px) {

    .christmas-element.large,
    .gift,
    .christmas-element:nth-child(n+12) {
        display: none;
    }

    .corner-sparkle.bottom-left,
    .corner-sparkle.bottom-right {
        display: none;
    }
}

/* Modo de bajo rendimiento - reducir elementos */
@media (prefers-reduced-motion: reduce) {
    .christmas-element {
        animation-duration: 20s !important;
    }

    .christmas-element:nth-child(n+6) {
        display: none;
    }

    .corner-sparkle {
        animation: none;
        opacity: 0.5;
    }
}

/* Pantallas muy cortas - reducir elementos */
@media (max-height: 500px) {
    .christmas-element:nth-child(n+8) {
        display: none;
    }
}