/* --- Variables & Reset --- */
:root {
    --primary-blue: #0b2545;   /* Skytop Deep Blue */
    --accent-green: #28a745;   /* Skytop Success Green */
    --light-gray: #f8f9fa;
    --text-dark: #333;
    --text-light: #fff;
    --font-main: 'Poppins', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    background-color: var(--light-gray);
    color: var(--text-dark);
    line-height: 1.6;
}

/* --- Navigation Bar --- */
.navbar {
    background-color: #fff;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    text-decoration: none;
    letter-spacing: 1px;
}

.logo span {
    color: var(--accent-green);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--primary-blue);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s;
}

.nav-menu a:hover, .nav-menu a.active {
    color: var(--accent-green);
}

.btn-primary {
    background-color: var(--accent-green);
    color: #fff;
    padding: 10px 25px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: background 0.3s;
}

.btn-primary:hover {
    background-color: #218838;
}

.hamburger {
    display: none;
    font-size: 1.5rem;
    color: var(--primary-blue);
    cursor: pointer;
}

/* --- Hero Section --- */
.page-header {
    background: linear-gradient(rgba(11, 37, 69, 0.9), rgba(11, 37, 69, 0.8)), url('uploads/header-bg.jpg');
    background-size: cover;
    background-position: center;
    background-color: var(--primary-blue); /* Fallback */
    color: #fff;
    text-align: center;
    padding: 80px 20px;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.page-header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* --- Gallery Grid --- */
.gallery-wrapper {
    max-width: 1200px;
    margin: 50px auto;
    padding: 0 20px;
}

.gallery-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

/* --- Gallery Card --- */
.gallery-card {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gallery-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.image-box {
    position: relative;
    height: 250px;
    overflow: hidden;
    cursor: pointer;
}

.image-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(11, 37, 69, 0.6); /* Blue tint overlay */
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.gallery-card:hover .overlay {
    opacity: 1;
}

.overlay i {
    color: #fff;
    font-size: 2rem;
    background: var(--accent-green);
    padding: 15px;
    border-radius: 50%;
}

/* --- Lightbox --- */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    justify-content: center;
    align-items: center;
}

.modal-content {
    max-width: 90%;
    max-height: 85vh;
    border: 5px solid #fff;
    border-radius: 4px;
}

.close-btn {
    position: absolute;
    top: 30px;
    right: 40px;
    color: #fff;
    font-size: 50px;
    cursor: pointer;
}

.empty-state {
    text-align: center;
    grid-column: 1 / -1;
    color: #999;
    padding: 50px;
}
.empty-state i {
    font-size: 3rem;
    margin-bottom: 10px;
}

/* --- Mobile Responsive --- */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: #fff;
        text-align: center;
        padding: 20px 0;
        box-shadow: 0 5px 10px rgba(0,0,0,0.05);
    }
    
    .nav-menu.active {
        display: flex;
    }

    .hamburger {
        display: block;
    }

    .btn-primary {
        display: none; /* Hide Apply button on small mobile if needed */
    }
}