/* === Base & Typography === */
html {
    scroll-behavior: smooth;
}

body {
    overflow-x: hidden;
}

::selection {
    background: rgba(94, 234, 212, 0.2);
    color: #5EEAD4;
}

/* === Navigation === */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    width: 0;
    height: 1px;
    background: #5EEAD4;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

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

/* === Navbar Scroll State === */
nav.scrolled {
    background: rgba(10, 22, 40, 0.95);
    backdrop-blur-xl;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

nav.scrolled .nav-link {
    color: rgba(255, 255, 255, 0.85);
}

/* === Floating Cards Animation === */
.floating-card-1 {
    animation: float1 6s ease-in-out infinite;
}

.floating-card-2 {
    animation: float2 7s ease-in-out infinite;
}

.floating-card-3 {
    animation: float3 5.5s ease-in-out infinite;
}

.floating-card-4 {
    animation: float4 6.5s ease-in-out infinite;
}

@keyframes float1 {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-12px) rotate(0.5deg); }
}

@keyframes float2 {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-16px) rotate(-0.5deg); }
}

@keyframes float3 {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-10px) rotate(0.3deg); }
}

@keyframes float4 {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
}

/* === Scroll Reveal Animations === */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* === Mobile Menu === */
.mobile-link {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-menu.open .mobile-link {
    opacity: 1;
    transform: translateY(0);
}

.mobile-menu.open .mobile-link:nth-child(1) { transition-delay: 0.05s; }
.mobile-menu.open .mobile-link:nth-child(2) { transition-delay: 0.1s; }
.mobile-menu.open .mobile-link:nth-child(3) { transition-delay: 0.15s; }
.mobile-menu.open .mobile-link:nth-child(4) { transition-delay: 0.2s; }

/* === Form Styles === */
input:focus,
textarea:focus {
    box-shadow: 0 0 0 4px rgba(94, 234, 212, 0.08);
}

/* === Smooth hover for cards === */
.group:hover {
    transform: translateY(-4px);
}

.group {
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* === Mobile responsive === */
@media (max-width: 768px) {
    .floating-card-1,
    .floating-card-2,
    .floating-card-3,
    .floating-card-4 {
        display: none;
    }
}

/* === Focus visible === */
:focus-visible {
    outline: 2px solid rgba(94, 234, 212, 0.5);
    outline-offset: 2px;
}

/* === Reduce motion === */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    html {
        scroll-behavior: auto;
    }
    .reveal {
        opacity: 1;
        transform: none;
    }
}