/* Base & Utilities */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Scroll Reveal Animations - Progressive Enhancement */
@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 1;
        transform: translateY(0);
        transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    }
}

/* Default state (no JS) - content is visible */
.reveal {
    opacity: 1;
    transform: translateY(0);
}

/* JS-enhanced hidden state */
.reveal.revealed {
    opacity: 0;
    transform: translateY(24px);
}

@media (prefers-reduced-motion: no-preference) {
    .reveal.revealed {
        opacity: 0;
        transform: translateY(24px);
    }
    .reveal.visible {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Navbar scroll state */
.navbar-scrolled {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 20px rgba(13, 148, 136, 0.08);
}

/* Hero floating card animation */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
}

@media (prefers-reduced-motion: no-preference) {
    .floating-card {
        animation: float 4s ease-in-out infinite;
    }
}

/* Subtle pattern for sections */
.pattern-dots {
    background-image: radial-gradient(circle, rgba(13, 148, 136, 0.06) 1px, transparent 1px);
    background-size: 24px 24px;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #f0fdfa;
}
::-webkit-scrollbar-thumb {
    background: #99f6e4;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #5eead4;
}

/* Selection color */
::selection {
    background: rgba(13, 148, 136, 0.15);
    color: #134e4a;
}

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

#mobile-menu.open {
    max-height: 400px;
    opacity: 1;
}

/* Smooth image loading */
img {
    background-color: #f0fdfa;
}

/* Focus visible for accessibility */
:focus-visible {
    outline: 2px solid #14b8a6;
    outline-offset: 2px;
    border-radius: 4px;
}

/* Button hover lift */
button, a {
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}