*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    margin: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: #6ee7b7;
    color: #064e3b;
}

/* Scroll reveal — progressive enhancement, hidden by default, shown by JS */
@media (prefers-reduced-motion: no-preference) {
    .scroll-reveal {
        opacity: 0;
        transform: translateY(24px);
        transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .scroll-reveal.is-visible {
        opacity: 1;
        transform: translateY(0);
    }
    .scroll-reveal:nth-child(2) { transition-delay: 0.1s; }
    .scroll-reveal:nth-child(3) { transition-delay: 0.2s; }
    .scroll-reveal:nth-child(4) { transition-delay: 0.3s; }
    .scroll-reveal:nth-child(5) { transition-delay: 0.4s; }
    .scroll-reveal:nth-child(6) { transition-delay: 0.5s; }
}

/* Hero orbs animation */
@keyframes float-1 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -40px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}
@keyframes float-2 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(-40px, 30px) scale(1.08); }
    66% { transform: translate(25px, -25px) scale(0.92); }
}
@keyframes float-3 {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    33% { transform: translate(-48%, -52%) scale(1.06); }
    66% { transform: translate(-52%, -48%) scale(0.94); }
}

.hero-orb {
    animation: float-1 12s ease-in-out infinite, float-2 15s ease-in-out infinite;
}
.orb-1 { animation-duration: 14s, 18s; }
.orb-2 { animation-duration: 16s, 12s; }
.orb-3 { animation-duration: 20s, 22s; }

/* Navbar transition */
#navbar.scrolled {
    background: rgba(253, 251, 247, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 1px 0 rgba(16, 185, 129, 0.08), 0 4px 24px rgba(0, 0, 0, 0.04);
}

/* Focus visible styles */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
    outline: 2px solid #10b981;
    outline-offset: 2px;
    border-radius: 4px;
}

/* Mobile menu animation */
#mobile-menu {
    animation: slideDown 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Subtle gradient border on cards */
.group:hover .rounded-3xl {
    border-image: linear-gradient(135deg, #6ee7b7, #38bdf8) 1;
}