/* Custom styles for Bulgarian School website */

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

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

::-webkit-scrollbar-track {
    background: #0a0f1e;
}

::-webkit-scrollbar-thumb {
    background: #162040;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #d4a853;
}

/* Selection color */
::selection {
    background: rgba(212, 168, 83, 0.3);
    color: #fff;
}

/* Hero gradient animation */
@keyframes shimmer {
    0% { background-position: -200% center; }
    100% { background-position: 200% center; }
}

/* Fade in animation for below-fold content */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Reduced motion preference */
@media (prefers-reduced-motion: no-preference) {
    .fade-in {
        opacity: 0;
        transform: translateY(20px);
    }
    
    .fade-in.visible {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Navigation active state */
nav.scrolled {
    background: rgba(10, 15, 30, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(212, 168, 83, 0.1);
}

/* Gold accent line animation */
@keyframes goldPulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

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

/* Card hover effects */
.program-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.program-card:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* Form focus states */
input:focus,
textarea:focus {
    outline: none;
    box-shadow: 0 0 0 1px rgba(212, 168, 83, 0.3);
}

/* Button ripple effect */
button {
    position: relative;
    overflow: hidden;
}

button::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

button:active::after {
    width: 200px;
    height: 200px;
}

/* Image lazy loading fade */
img {
    transition: opacity 0.3s ease;
}

img[loading="lazy"] {
    opacity: 0;
}

img[loading="lazy"].loaded {
    opacity: 1;
}

/* Mobile menu transition */
#mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

#mobile-menu.open {
    max-height: 400px;
}

/* Responsive typography */
@media (max-width: 640px) {
    .font-serif {
        font-size: 1.5rem;
    }
    
    h1, h2 {
        line-height: 1.2;
    }
}

/* Print styles */
@media print {
    nav, button, iframe {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
}