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

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

body {
    background-color: #0A1F44;
    color: #ffffff;
}

::selection {
    background-color: rgba(79, 211, 164, 0.3);
    color: #ffffff;
}

/* ── Navbar ── */
.nav-scrolled {
    background: rgba(10, 31, 68, 0.92) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    box-shadow: 0 4px 40px rgba(0, 0, 0, 0.3);
}

.nav-transparent {
    background: transparent !important;
    border-bottom: 1px solid transparent !important;
    box-shadow: none !important;
}

/* ── Floating Cards ── */
@keyframes float-1 {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
}

@keyframes float-2 {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(10px); }
}

@keyframes float-3 {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
}

.card-float-1 {
    animation: float-1 6s ease-in-out infinite;
}

.card-float-2 {
    animation: float-2 7s ease-in-out infinite;
}

.card-float-3 {
    animation: float-3 5.5s ease-in-out infinite;
}

/* ── Scroll Reveal (progressive enhancement) ── */
@media (prefers-reduced-motion: no-preference) {
    .reveal-up,
    .reveal-left,
    .reveal-right {
        opacity: 0;
        transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                    transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .reveal-up {
        transform: translateY(40px);
    }

    .reveal-left {
        transform: translateX(-40px);
    }

    .reveal-right {
        transform: translateX(40px);
    }

    .reveal-visible {
        opacity: 1;
        transform: translate(0, 0) !important;
    }
}

/* Fallback: always visible if JS is disabled or reduced motion */
@media (prefers-reduced-motion: reduce) {
    .reveal-up,
    .reveal-left,
    .reveal-right {
        opacity: 1;
        transform: none;
    }
}

/* ── Mobile Menu ── */
.mobile-menu-open {
    opacity: 1 !important;
    pointer-events: all !important;
}

.mobile-menu-closed {
    opacity: 0 !important;
    pointer-events: none !important;
}

/* ── Button & Link Focus ── */
a:focus-visible,
button:focus-visible {
    outline: 2px solid #4FD3A4;
    outline-offset: 4px;
    border-radius: 4px;
}

/* ── Smooth image loading ── */
img {
    background-color: rgba(255, 255, 255, 0.03);
}

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

::-webkit-scrollbar-track {
    background: #040D1C;
}

::-webkit-scrollbar-thumb {
    background: rgba(79, 211, 164, 0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(79, 211, 164, 0.5);
}