*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    overflow-x: hidden;
}

/* ===================== HERO ===================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to right,
        rgba(4, 9, 20, 0.92) 0%,
        rgba(10, 31, 63, 0.80) 50%,
        rgba(7, 20, 41, 0.55) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 10;
}

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

.nav.scrolled {
    background: rgba(10, 31, 63, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: #4ADE80;
    transition: width 0.3s ease;
}

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

/* ===================== MOBILE MENU ===================== */
.mobile-nav-link {
    position: relative;
    padding-left: 0;
}

/* ===================== SERVICES ===================== */
.service-card {
    opacity: 1;
}

/* ===================== WHY US ===================== */

/* ===================== PROCESS ===================== */
.process-card {
    opacity: 1;
}

/* ===================== GALLERY ===================== */
.gallery-item {
    opacity: 1;
}

/* ===================== BACK TO TOP ===================== */
.back-to-top {
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
    transition: opacity 0.3s ease, transform 0.3s ease, background-color 0.3s ease;
}

.back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-2px);
}

/* ===================== ANIMATIONS ===================== */
@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

@keyframes scroll-dot {
    0% { transform: translateY(0); opacity: 1; }
    100% { transform: translateY(12px); opacity: 0; }
}

.scroll-dot {
    animation: scroll-dot 1.5s ease-in-out infinite;
}

/* ===================== REVEAL ANIMATIONS ===================== */
/* Default state: visible (progressive enhancement) */
.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

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

/* ===================== FORM ===================== */
input:focus, select:focus, textarea:focus {
    outline: none;
}

/* ===================== ACCESSIBILITY ===================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.sr-only:focus {
    position: fixed;
    top: 1rem;
    left: 1rem;
    width: auto;
    height: auto;
    padding: 0.5rem 1rem;
    margin: 0;
    overflow: visible;
    clip: auto;
    white-space: normal;
    background: #0A1F3F;
    color: #fff;
    border-radius: 0.5rem;
    z-index: 9999;
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 768px) {
    .hero {
        min-height: 100svh;
    }

    .hero-content {
        padding-top: 6rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}