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

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

body {
    overflow-x: hidden;
}

/* Selection */
::selection {
    background-color: rgba(20, 184, 166, 0.2);
    color: #0f766e;
}

/* Navbar */
.nav {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 30px -10px rgba(0, 0, 0, 0.08);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: #14b8a6;
    border-radius: 1px;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 60%;
}

/* Mobile Menu */
#mobile-menu {
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.mobile-nav-link {
    transition: all 0.3s ease;
}

/* Floating Cards Animations */
.floating-card-1 {
    animation: float1 4s ease-in-out infinite;
}

.floating-card-2 {
    animation: float2 5s ease-in-out infinite;
}

.floating-card-3 {
    animation: float3 4.5s ease-in-out infinite;
}

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

@keyframes float2 {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-8px); }
}

@keyframes float3 {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
}

/* Scroll Reveal Animations */
/* Default state: visible (progressive enhancement) */
.reveal {
    opacity: 1;
    transform: none;
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

/* When JS is enabled, add hidden class for reveal effect */
.js-enabled .reveal {
    opacity: 0;
    transform: translateY(30px);
}

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

.js-enabled .reveal:nth-child(2) { transition-delay: 0.1s; }
.js-enabled .reveal:nth-child(3) { transition-delay: 0.2s; }
.js-enabled .reveal:nth-child(4) { transition-delay: 0.3s; }
.js-enabled .reveal:nth-child(5) { transition-delay: 0.35s; }
.js-enabled .reveal:nth-child(6) { transition-delay: 0.4s; }

/* Staggered reveal for grid items */
.js-enabled .reveal.grid-item {
    opacity: 0;
    transform: translateY(25px);
}

.js-enabled .reveal.grid-item.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    .reveal,
    .reveal.grid-item,
    .floating-card-1,
    .floating-card-2,
    .floating-card-3 {
        animation: none;
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* Focus styles */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid #14b8a6;
    outline-offset: 2px;
    border-radius: 4px;
}

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

::-webkit-scrollbar-track {
    background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Input autofill override */
input:-webkit-autofill,
textarea:-webkit-autofill,
select:-webkit-autofill {
    -webkit-box-shadow: 0 0 0 30px white inset !important;
}

/* Print styles */
@media print {
    .nav, .floating-card-1, .floating-card-2, .floating-card-3 {
        display: none;
    }
    
    body {
        color: #000;
        background: #fff;
    }
}