/* === Base & Typography === */
html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background-color: #060f1e;
    color: #ffffff;
}

::selection {
    background-color: rgba(52, 212, 182, 0.3);
    color: #ffffff;
}

/* === Scrollbar === */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #060f1e;
}
::-webkit-scrollbar-thumb {
    background: #111f38;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #1a2d4a;
}

/* === Animations === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* === Hero Animations === */
.hero-eyebrow {
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.2s;
}

.hero-title-line {
    animation: fadeInUp 0.8s ease forwards;
}
.hero-title-line:nth-child(1) { animation-delay: 0.3s; }
.hero-title-line:nth-child(2) { animation-delay: 0.45s; }
.hero-title-line:nth-child(3) { animation-delay: 0.6s; }

.hero-subtitle {
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.75s;
}

.hero-cta {
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.9s;
}

.hero-trust {
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 1.05s;
}

.hero-image-stack {
    animation: fadeIn 1.2s ease forwards;
    animation-delay: 0.5s;
    opacity: 0;
}

/* === Section Animations === */
.section-eyebrow,
.section-title,
.section-subtitle {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.section-eyebrow.visible,
.section-title.visible,
.section-subtitle.visible {
    opacity: 1;
    transform: translateY(0);
}

/* === Service Cards === */
.service-card {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.service-card.visible {
    opacity: 1;
    transform: translateY(0);
}

/* === Gallery Items === */
.gallery-item {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.gallery-item.visible {
    opacity: 1;
    transform: scale(1);
}

/* === Testimonial Cards === */
.testimonial-card {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.testimonial-card.visible {
    opacity: 1;
    transform: translateY(0);
}

/* === Navigation === */
#nav {
    background: transparent;
    transition: background 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;
}

#nav.scrolled {
    background: rgba(6, 15, 30, 0.9);
    backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

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

#mobileMenu.closed {
    opacity: 0;
    pointer-events: none;
}

.mobile-link {
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease, color 0.3s ease;
}

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

#mobileMenu.open .mobile-link:nth-child(1) { transition-delay: 0.1s; }
#mobileMenu.open .mobile-link:nth-child(2) { transition-delay: 0.15s; }
#mobileMenu.open .mobile-link:nth-child(3) { transition-delay: 0.2s; }
#mobileMenu.open .mobile-link:nth-child(4) { transition-delay: 0.25s; }
#mobileMenu.open .mobile-link:nth-child(5) { transition-delay: 0.3s; }

/* === Menu Button === */
.menu-line {
    transition: transform 0.3s ease, opacity 0.3s ease;
}

#menuBtn.active .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(3px, 3px);
}
#menuBtn.active .menu-line:nth-child(2) {
    opacity: 0;
}
#menuBtn.active .menu-line:nth-child(3) {
    transform: rotate(-45deg) translate(3px, -3px);
    width: 1.25rem;
}

/* === Back to Top === */
#backToTop {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

#backToTop.show {
    opacity: 1;
    pointer-events: all;
}

#backToTop.show:hover {
    transform: translateY(-4px);
}

/* === Divider Lines === */
.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(52, 212, 182, 0), transparent);
    transition: background 0.5s ease;
}

.service-card:hover::before {
    background: linear-gradient(90deg, transparent, rgba(52, 212, 182, 0.3), transparent);
}

/* === Utility === */
.stagger-1 { transition-delay: 0.1s !important; }
.stagger-2 { transition-delay: 0.2s !important; }
.stagger-3 { transition-delay: 0.3s !important; }
.stagger-4 { transition-delay: 0.4s !important; }
.stagger-5 { transition-delay: 0.5s !important; }
.stagger-6 { transition-delay: 0.6s !important; }