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

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

body {
    overflow-x: hidden;
}

::selection {
    background: rgba(13, 148, 136, 0.2);
    color: #0f766e;
}

/* === Navigation === */
.nav-text {
    color: rgba(255, 255, 255, 0.95);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: rgba(255, 255, 255, 0.6);
    transition: width 0.3s ease;
}

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

/* === Navbar scroll state === */
nav.scrolled {
    background: rgba(8, 14, 26, 0.92) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

nav.scrolled .nav-text {
    color: #ffffff;
}

nav.scrolled .nav-link {
    color: rgba(255, 255, 255, 0.8) !important;
}

/* === Floating Card Animations === */
.floating-card {
    animation: float 6s ease-in-out infinite;
}

.card-1 {
    animation-delay: 0s;
}

.card-2 {
    animation-delay: -2s;
}

.card-3 {
    animation-delay: -4s;
}

.card-4 {
    animation-delay: -1s;
}

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

/* === Scroll Reveal === */
.scroll-reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

@media (prefers-reduced-motion: no-preference) {
    .scroll-reveal {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.7s ease, transform 0.7s ease;
    }

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

    .scroll-reveal:nth-child(2) { transition-delay: 0.1s; }
    .scroll-reveal:nth-child(3) { transition-delay: 0.2s; }
    .scroll-reveal:nth-child(4) { transition-delay: 0.3s; }
    .scroll-reveal:nth-child(5) { transition-delay: 0.4s; }
    .scroll-reveal:nth-child(6) { transition-delay: 0.5s; }
}

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

/* === Custom Select Arrow === */
select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

/* === Button Focus States === */
button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid #0d9488;
    outline-offset: 2px;
}

/* === Smooth image loading === */
img {
    opacity: 1;
    transition: opacity 0.3s ease;
}

/* === Print Styles === */
@media print {
    nav, #mobileMenu, .floating-card {
        display: none !important;
    }
}