/* ============================================
   Hi-Tech Diagnostic Center — Custom Styles
   ============================================ */

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

/* Base font settings */
body {
    overflow-x: hidden;
}

/* Navbar scroll state */
#navbar.scrolled {
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 20px rgba(0, 0, 0, 0.08);
}

#navbar.scrolled .font-heading {
    color: #1e2025;
}

/* Mobile menu transitions */
#mobile-menu {
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Floating card animations */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
}

@keyframes float-delayed {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
}

@keyframes float-slow {
    0%, 100% { transform: translateY(0px) translateX(0px); }
    50% { transform: translateY(-6px) translateX(4px); }
}

.floating-card-1 {
    animation: float 4s ease-in-out infinite;
}

.floating-card-2 {
    animation: float-delayed 5s ease-in-out infinite;
}

.floating-card-3 {
    animation: float-slow 6s ease-in-out infinite;
}

/* Scroll reveal animations (progressive enhancement) */
.reveal {
    opacity: 1;
    transform: none;
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Reduced motion preference */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
    }

    .reveal.visible {
        opacity: 1;
        transform: translateY(0);
    }

    .reveal:nth-child(2) { transition-delay: 0.1s; }
    .reveal:nth-child(3) { transition-delay: 0.2s; }
    .reveal:nth-child(4) { transition-delay: 0.3s; }
}

/* Back to top button */
#back-to-top.visible {
    opacity: 1;
    pointer-events: all;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

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

::-webkit-scrollbar-track {
    background: #f6f6f7;
}

::-webkit-scrollbar-thumb {
    background: #c7c8cc;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a1a3aa;
}

/* Focus visible for accessibility */
*:focus-visible {
    outline: 2px solid #ff6b35;
    outline-offset: 2px;
}

/* Selection color */
::selection {
    background: #ffd3be;
    color: #1e2025;
}