:root {
    --primary-color: #007ACC;
    --accent-color: #79f299;
    --bg-light: #f0faff;
    --text-color: #333;
    --white: #ffffff;
    --transition-speed: 0.3s;
}

/* =============================
   GLOBAL RESET
============================= */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: 'Poppins', sans-serif;
    background-color: #F8F8F8;
    color: var(--text-color);
}

/* =============================
   NAVBAR (FIXED & MOBILE SAFE)
============================= */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 5%;
    background-color: var(--primary-color);
    position: relative;           /* 🔥 REQUIRED */
    z-index: 1000;                /* 🔥 REQUIRED */
    width: 100%;
}

/* Sticky state */
.navbar.sticky {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(0, 122, 204, 0.95);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

/* Logo */
.logo-container {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 40px;
    width: 40px;
    border-radius: 50%;
    margin-right: 10px;
    object-fit: cover;
}

.company-name {
    color: white;
    font-size: 1.5rem;
    margin: 0;
    text-decoration: none;
}

/* Nav links (desktop) */
.nav-links {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 600;
    padding: 10px 15px;
    transition: color 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-color);
}

/* Hamburger */
.hamburger {
    display: none;
    color: white;
    font-size: 1.6rem;
    cursor: pointer;
    z-index: 1100;                /* 🔥 clickable */
}

/* Motto */
.search-and-motto {
    display: flex;
    align-items: center;
}

.motto {
    color: white;
    font-size: 0.9rem;
    font-style: italic;
}

/* =============================
   MOBILE NAV (TOGGLE FIX)
============================= */
@media (max-width: 900px) {

    .hamburger {
        display: block;
    }

    .search-and-motto {
        display: none;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--primary-color);
        flex-direction: column;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease-in-out;
        z-index: 1050;           /* 🔥 above page content */
    }

    .nav-links.open {
        max-height: 400px;
    }

    .nav-link {
        padding: 16px;
        text-align: center;
        border-top: 1px solid rgba(255,255,255,0.15);
    }
}

/* =============================
   GALLERY CONTENT
============================= */
.gallery-hero {
    text-align: center;
    padding: 80px 5% 40px;
    background: linear-gradient(rgba(0,150,230,0.1), rgba(0,150,230,0.05));
}

.gallery-hero h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
}

.gallery-container {
    padding: 20px 5% 80px;
    max-width: 1200px;
    margin: 0 auto;
}

.category-header {
    margin-bottom: 25px;
    border-left: 5px solid var(--accent-color);
    padding-left: 15px;
}

.category-header h2 {
    color: var(--primary-color);
}

/* Grid */
.image-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.img-box {
    aspect-ratio: 1 / 1;
    overflow: hidden;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.05);
    transition: transform 0.4s ease;
}

.img-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.img-box:hover {
    transform: translateY(-5px);
}

.img-box:hover img {
    transform: scale(1.1);
}

/* Mobile grid */
@media (max-width: 900px) {
    .image-grid {
        grid-template-columns: 1fr;
    }

    .img-box {
        max-width: 400px;
        margin: 0 auto;
    }
}

/* =============================
   BACK TO TOP
============================= */
#backToTop {
    display: none;
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1200;
    border: none;
    background-color: var(--accent-color);
    color: var(--primary-color);
    padding: 15px;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

/* =============================
   FOOTER
============================= */
.main-footer {
    background-color: var(--primary-color);
    color: white;
    padding: 40px 5%;
    text-align: center;
}

.footer-content-wrapper {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 30px;
}

.social-icons a {
    color: white;
    font-size: 1.8rem;
    margin: 0 10px;
}

/* =============================
   REVEAL ANIMATION
============================= */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: 0.8s ease-out;
}

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