/* ======================================================
   PREMIUM THREADKNIT LOGO PRELOADER
   Luxury Fashion Brand Style
   ====================================================== */

/* Main Preloader Container */
#tk-preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    z-index: 99999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), 
                visibility 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

#tk-preloader.fade-out {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* Logo Container */
.preloader-logo-container {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    animation: logoEntrance 1s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* THREADKNIT Logo Text */
.preloader-logo-text {
    font-family: 'Anton', 'DM Sans', sans-serif;
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    
    /* Premium Golden Gradient */
    background: linear-gradient(
        135deg,
        #d4af37 0%,
        #f4e5c3 25%,
        #d4af37 50%,
        #f4e5c3 75%,
        #d4af37 100%
    );
    background-size: 200% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    
    /* Soft Glow Effect */
    filter: drop-shadow(0 0 20px rgba(212, 175, 55, 0.3));
    
    /* Smooth Animations */
    animation: 
        shimmerMove 3s ease-in-out infinite,
        gentlePulse 2s ease-in-out infinite;
    
    /* GPU Acceleration */
    will-change: transform, filter;
    transform: translateZ(0);
}

/* Shimmer Underline */
.preloader-shimmer {
    width: 80%;
    height: 2px;
    margin-top: 20px;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(212, 175, 55, 0.4) 50%,
        transparent 100%
    );
    background-size: 200% 100%;
    border-radius: 2px;
    animation: shimmerSlide 2s ease-in-out infinite;
    opacity: 0;
    animation-delay: 0.5s;
    animation-fill-mode: forwards;
}

/* ======================================================
   KEYFRAME ANIMATIONS
   ====================================================== */

/* Logo Entrance */
@keyframes logoEntrance {
    0% {
        opacity: 0;
        transform: translateY(30px) scale(0.9);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* Shimmer Gradient Movement */
@keyframes shimmerMove {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

/* Gentle Pulse Effect */
@keyframes gentlePulse {
    0%, 100% {
        transform: scale(1);
        filter: drop-shadow(0 0 20px rgba(212, 175, 55, 0.3));
    }
    50% {
        transform: scale(1.02);
        filter: drop-shadow(0 0 30px rgba(212, 175, 55, 0.5));
    }
}

/* Shimmer Line Slide */
@keyframes shimmerSlide {
    0% {
        opacity: 0;
        background-position: -200% 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 1;
        background-position: 200% 0;
    }
}

/* ======================================================
   RESPONSIVE ADJUSTMENTS
   ====================================================== */

@media (max-width: 768px) {
    .preloader-logo-text {
        font-size: clamp(1.5rem, 8vw, 2.5rem);
        letter-spacing: 0.1em;
    }
    
    .preloader-shimmer {
        width: 90%;
        margin-top: 15px;
    }
}

/* ======================================================
   PERFORMANCE OPTIMIZATIONS
   ====================================================== */

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    .preloader-logo-text {
        animation: logoEntrance 0.5s ease-out forwards;
    }
    
    .preloader-shimmer {
        animation: none;
        opacity: 1;
    }
    
    #tk-preloader.fade-out {
        transition: opacity 0.3s ease-out, visibility 0.3s ease-out;
    }
}

/* Force GPU acceleration for smooth animations */
#tk-preloader,
.preloader-logo-container,
.preloader-logo-text,
.preloader-shimmer {
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    -webkit-perspective: 1000px;
    perspective: 1000px;
}