/* Custom styles for Dr. Samuel Lin Medical Practice */

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

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

::-webkit-scrollbar-track {
    background: #0a0f1a;
}

::-webkit-scrollbar-thumb {
    background: #1e3a5f;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #0d9488;
}

/* Selection color */
::selection {
    background: rgba(20, 184, 166, 0.3);
    color: #f0fdfa;
}

/* Reveal animations - progressive enhancement */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.8s ease, transform 0.8s ease;
    }
    
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Navbar styles */
.nav-scrolled {
    background: rgba(10, 15, 26, 0.95) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(30, 58, 95, 0.3);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

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

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

/* Form focus styles */
input:focus,
textarea:focus {
    box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.1);
}

/* Gold shimmer effect */
.gold-shimmer {
    background: linear-gradient(90deg, #fbbf24, #fcd34d, #fbbf24);
    background-size: 200% 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* Card hover glow */
.glow-hover:hover {
    box-shadow: 0 0 40px rgba(20, 184, 166, 0.15);
}

/* Button ripple effect */
.btn-ripple {
    position: relative;
    overflow: hidden;
}

.btn-ripple::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;
}

.btn-ripple:active::after {
    width: 300px;
    height: 300px;
}

/* Gradient text utility */
.gradient-text {
    background: linear-gradient(135deg, #5eead4, #14b8a6, #0d9488);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Pulse dot animation */
.pulse-dot {
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

/* Image parallax helper */
.parallax-img {
    will-change: transform;
}

/* Responsive typography adjustments */
@media (max-width: 640px) {
    .font-serif {
        font-size: clamp(1.75rem, 5vw, 2.5rem);
    }
}

/* Print styles */
@media print {
    nav, #contact-form, .animate-float, .animate-float-delayed, .animate-float-slow {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    section {
        page-break-inside: avoid;
    }
}