/* Base & Resets */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    margin: 0;
    overflow-x: hidden;
}

/* Navbar */
.navbar {
    transition: box-shadow 0.3s ease, background 0.3s ease;
}

.navbar.scrolled {
    box-shadow: 0 1px 20px rgba(13, 148, 136, 0.08);
}

/* Mobile Menu */
.mobile-menu {
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Floating Cards */
.floating-card {
    animation: float 6s ease-in-out infinite;
}

.card-1 {
    animation-delay: 0s;
}

.card-2 {
    animation-delay: -2s;
}

.card-3 {
    animation-delay: -4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-12px);
    }
}

/* Scroll Reveal Animations */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* Scroll-triggered animations (progressive enhancement via JS) */
@media (prefers-reduced-motion: no-preference) {
    .js-reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.7s ease, transform 0.7s ease;
    }

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

/* Smooth anchor offset */
section[id] {
    scroll-margin-top: 80px;
}

/* Selection color */
::selection {
    background-color: rgba(13, 148, 136, 0.2);
    color: #0f766e;
}

/* Focus styles */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid #0d9488;
    outline-offset: 2px;
    border-radius: 4px;
}

/* 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;
}