/* ── Base & Utilities ── */
html {
    scroll-behavior: smooth;
}

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

/* ── Scroll Reveal ── */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

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

/* ── Card Hover ── */
.card-hover {
    transform: translateY(0);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card-hover:hover {
    transform: translateY(-4px);
}

/* ── Floating Cards Animation ── */
@media (prefers-reduced-motion: no-preference) {
    .floating-card-1 {
        animation: float-1 6s ease-in-out infinite;
    }
    .floating-card-2 {
        animation: float-2 7s ease-in-out infinite;
    }
    .floating-card-3 {
        animation: float-3 5.5s ease-in-out infinite;
    }
    .floating-card-4 {
        animation: float-4 6.5s ease-in-out infinite;
    }
}

@keyframes float-1 {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-12px) rotate(1deg); }
}

@keyframes float-2 {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-16px) rotate(-1deg); }
}

@keyframes float-3 {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-10px) rotate(1deg); }
}

@keyframes float-4 {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-14px); }
}

/* ── Scroll Indicator ── */
@media (prefers-reduced-motion: no-preference) {
    .animate-scroll-indicator {
        animation: scroll-down 1.5s ease-in-out infinite;
    }
}

@keyframes scroll-down {
    0% { transform: translateY(-100%); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: translateY(100%); opacity: 0; }
}

/* ── Navbar Scroll State ── */
nav.scrolled {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 1px 20px rgba(0, 0, 0, 0.08);
}

nav.scrolled .nav-logo-text {
    color: #1e293b;
}

/* ── Mobile Menu ── */
#mobile-menu {
    animation: slideDown 0.25s ease;
}

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

.mobile-nav-link {
    transition: color 0.2s ease;
}

.mobile-nav-link:hover {
    color: #0d9488;
}

/* ── Custom Selection ── */
::selection {
    background: #99f6e4;
    color: #134e4a;
}