/* ===== 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 {
    background-color: rgba(13, 148, 136, 0.2);
    color: #0f766e;
}

/* ===== Scroll Reveal Animation ===== */
.scroll-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);
}

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

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

/* ===== Hero Animations ===== */
.hero-eyebrow {
    animation: fadeSlideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.3s forwards;
    opacity: 0;
}

.hero-headline {
    animation: fadeSlideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.5s forwards;
    opacity: 0;
}

.hero-subtext {
    animation: fadeSlideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.7s forwards;
    opacity: 0;
}

.hero-ctas {
    animation: fadeSlideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.9s forwards;
    opacity: 0;
}

.hero-trust {
    animation: fadeSlideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 1.1s forwards;
    opacity: 0;
}

@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Navbar Transition ===== */
#navbar.scrolled {
    background: rgba(8, 14, 26, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

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

#navbar.scrolled .nav-logo-sub {
    color: #99f6e4;
}

#navbar.scrolled .nav-link {
    color: rgba(255, 255, 255, 0.75);
}

#navbar.scrolled .nav-link:hover {
    color: #ffffff;
}

/* ===== Mobile Menu ===== */
#mobileMenu.open {
    opacity: 1;
    pointer-events: all;
}

#mobileMenu.open .mobile-link {
    animation: mobileLinkIn 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
    transform: translateY(20px);
}

#mobileMenu.open .mobile-link:nth-child(1) { animation-delay: 0.05s; }
#mobileMenu.open .mobile-link:nth-child(2) { animation-delay: 0.1s; }
#mobileMenu.open .mobile-link:nth-child(3) { animation-delay: 0.15s; }
#mobileMenu.open .mobile-link:nth-child(4) { animation-delay: 0.2s; }
#mobileMenu.open .mobile-link:nth-child(5) { animation-delay: 0.25s; }

@keyframes mobileLinkIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Menu Button Animation ===== */
.menu-btn-active .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(3px, 3px);
}

.menu-btn-active .menu-line:nth-child(2) {
    opacity: 0;
}

.menu-btn-active .menu-line:nth-child(3) {
    width: 24px;
    transform: rotate(-45deg) translate(3px, -3px);
}

/* ===== 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%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

/* ===== Focus Visible ===== */
*:focus-visible {
    outline: 2px solid #0d9488;
    outline-offset: 2px;
}

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

::-webkit-scrollbar-track {
    background: #0f172a;
}

::-webkit-scrollbar-thumb {
    background: #1e293b;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #334155;
}

/* ===== Responsive adjustments ===== */
@media (max-width: 640px) {
    .font-serif {
        line-height: 1.15;
    }
}