/* Custom CSS for Filip Szwerluga Portfolio */

/* Custom keyframe animations */
@keyframes gradient-x {
    0%, 100% {
        background-size: 200% 200%;
        background-position: left center;
    }
    50% {
        background-size: 200% 200%;
        background-position: right center;
    }
}

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

@keyframes glow {
    from { 
        box-shadow: 0 0 20px #7c3aed; 
    }
    to { 
        box-shadow: 0 0 30px #7c3aed, 0 0 40px #7c3aed; 
    }
}

/* Custom animation classes */
.animate-gradient-x {
    animation: gradient-x 15s ease infinite;
}

.animate-float {
    animation: float 6s ease-in-out infinite;
}

.animate-glow {
    animation: glow 2s ease-in-out infinite alternate;
}

/* Floating particle delays */
.particle-1 { animation-delay: 0s; }
.particle-2 { animation-delay: 2s; }
.particle-3 { animation-delay: 4s; }
.particle-4 { animation-delay: 1s; }
.particle-5 { animation-delay: 3s; }

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #1f2937;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(45deg, #3b82f6, #8b5cf6);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(45deg, #2563eb, #7c3aed);
}

/* Smooth scroll behavior */
html {
    scroll-behavior: smooth;
}

/* Performance optimizations */
* {
    box-sizing: border-box;
}

/* Improve font rendering */
body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeSpeed;
}

/* Optimize images */
img {
    max-width: 100%;
    height: auto;
    image-rendering: optimizeQuality;
}

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

/* GPU acceleration for animations */
.animate-float,
.animate-glow,
.animate-gradient-x {
    transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
    perspective: 1000px;
}

/* Optimize heavy animations */
.project-card,
.achievement-card {
    transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
    perspective: 1000px;
}

/* Optimize floating particles for performance */
.floating-particles .particle {
    transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
}

/* Reduce complexity on slower devices */
@media (max-width: 1024px) {
    .animate-gradient-x {
        animation: none;
        background: linear-gradient(135deg, #1e40af, #7c3aed, #6366f1);
    }
    
    /* Disable expensive animations on mobile */
    .animate-float {
        animation: none;
        transform: translateY(0);
    }
}

/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
    .animate-gradient-x {
        animation: none;
        background: linear-gradient(135deg, #1e40af, #7c3aed, #6366f1);
    }
}

/* Performance optimization for animations */
@media (max-width: 768px) {
    /* Simplify complex gradients on mobile */
    .bg-gradient-to-br {
        background: #1e40af;
    }
}

/* Navigation background transition */
.nav-scrolled {
    background-color: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(16px);
    transition: all 0.3s ease;
}

/* Enhanced hover effects for project cards */
.project-card {
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-card:hover {
    transform: translateY(-8px) scale(1.02);
}

/* Achievement card glow effect */
.achievement-card {
    position: relative;
    transition: all 0.5s ease;
}

.achievement-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: inherit;
    border-radius: inherit;
    opacity: 0;
    filter: blur(10px);
    transform: scale(1.1);
    transition: opacity 0.5s ease;
    z-index: -1;
}

.achievement-card:hover::before {
    opacity: 0.7;
}

/* Text gradient effects */
.gradient-text-blue-purple {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gradient-text-purple-pink {
    background: linear-gradient(135deg, #8b5cf6, #ec4899);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gradient-text-indigo-cyan {
    background: linear-gradient(135deg, #6366f1, #06b6d4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gradient-text-pink-red {
    background: linear-gradient(135deg, #ec4899, #ef4444);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .floating-particles {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
}

/* Loading animation for better UX */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards;
}

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

/* Staggered animation delays */
.fade-in:nth-child(1) { animation-delay: 0.1s; }
.fade-in:nth-child(2) { animation-delay: 0.2s; }
.fade-in:nth-child(3) { animation-delay: 0.3s; }
.fade-in:nth-child(4) { animation-delay: 0.4s; }
.fade-in:nth-child(5) { animation-delay: 0.5s; }
.fade-in:nth-child(6) { animation-delay: 0.6s; }