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

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

body {
    margin: 0;
    background-color: #020617;
}

::selection {
    background: rgba(20, 184, 166, 0.3);
    color: #f0fdfa;
}

/* ── Geometric Background Shapes ── */
.geo-shape {
    position: absolute;
    pointer-events: none;
    will-change: transform;
}

.shape-circle-1 {
    top: 15%;
    right: -5%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(13, 148, 136, 0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.shape-circle-2 {
    bottom: 10%;
    left: -8%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(20, 184, 166, 0.06) 0%, transparent 70%);
    border-radius: 50%;
}

.shape-rect-1 {
    top: 40%;
    left: 5%;
    width: 200px;
    height: 200px;
    background: rgba(13, 148, 136, 0.04);
    border: 1px solid rgba(13, 148, 136, 0.08);
    border-radius: 24px;
    transform: rotate(45deg);
}

.shape-triangle {
    top: 60%;
    right: 10%;
    width: 0;
    height: 0;
    border-left: 60px solid transparent;
    border-right: 60px solid transparent;
    border-bottom: 104px solid rgba(13, 148, 136, 0.05);
}

.shape-dots {
    top: 25%;
    left: 15%;
    width: 120px;
    height: 120px;
    background-image: radial-gradient(circle, rgba(45, 212, 191, 0.15) 1px, transparent 1px);
    background-size: 16px 16px;
    border-radius: 50%;
}

/* ── Floating Card Animations ── */
.floating-card {
    animation: float 4s ease-in-out infinite;
}

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

.card-bottom {
    animation-delay: 1.5s;
}

.card-mid {
    animation-delay: 0.8s;
}

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

/* ── Navbar ── */
#navbar {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background: rgba(2, 6, 23, 0.7);
    border-bottom: 1px solid rgba(148, 163, 184, 0.05);
}

#navbar.scrolled {
    background: rgba(2, 6, 23, 0.92);
    border-bottom: 1px solid rgba(13, 148, 136, 0.15);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #2dd4bf;
    transition: width 0.25s ease;
}

.nav-link:hover::after {
    width: 100%;
}

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

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

.mobile-link {
    display: block;
}

/* ── Button Focus States ── */
a:focus-visible, button:focus-visible {
    outline: 2px solid #2dd4bf;
    outline-offset: 2px;
    border-radius: 0.5rem;
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
    .floating-card {
        animation: none;
    }
    html {
        scroll-behavior: auto;
    }
    img, .group:hover img {
        transition: none;
    }
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #020617;
}
::-webkit-scrollbar-thumb {
    background: #1e293b;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #334155;
}