:root {
    --primary-color: rgb(21, 21, 27);
    --border-color: rgb(85, 85, 85);
    --text-gray: rgb(180, 180, 180);
}

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

body {
    background-color: var(--primary-color);
    color: white;
    margin: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    font-family:'Courier New', Courier, monospace;
    overflow-x: hidden;
}

main {
    flex: 1;
    display: flex;
    width: 100%;
    flex-direction: column;
    align-items: center;
    overflow-y: auto;
    overflow-x: hidden;
    padding-bottom: 2rem;
    position: relative;
    z-index: 1; /* Lower z-index for main content */
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
    max-width: 100vw;
}

.nav-logo {
    margin: 0.5rem 0;
}

.nav-logo img {
    max-height: 50px;
    width: auto;
}

.nav-buttons {
    display: flex;
    gap: 3rem;
    font-size: 1.1rem;
    align-items: center;
    font-family:'Courier New', Courier, monospace;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.nav-buttons a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 0;
}

.nav-buttons a:hover {
    text-decoration: underline;
}

.fontawesome {
    font-size: 1.6rem;
}

header {
    position: sticky;
    top: 0;
    z-index: 1000; /* Higher z-index for header */
    padding: 0.5rem;
    background-color: var(--primary-color);
    border-bottom: 1px solid var(--border-color);
    width: 100%;
}

footer {
    margin-top: auto;
    width: 100%;
    position: relative;
    z-index: 1000; /* Higher z-index for footer */
}

.footer-text {
    text-align: center;
    border-top: 1px solid var(--border-color);
    color: var(--text-gray);
    margin: 0;
    padding: 0.8rem;
    font-family:'Courier New', Courier, monospace;
}

.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    min-height: 100%;
    background-color: var(--primary-color);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding-top: 20vh;
    z-index: 2000; /* Higher than everything else */
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3;
    border-top: 5px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.images-container {
    visibility: hidden;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
    padding: 1rem;
    z-index: 5; /* Middle-level z-index */
    margin-top: 2rem;
    width: 95%;
    max-width: 2400px;
}

.images-container img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    will-change: transform;
    cursor: pointer;
    position: relative; /* Enable z-index on images */
    z-index: 10; /* Higher than container but lower than header/footer */
}

.images-container img:hover {
    transform: scale(1.03);
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
    z-index: 15; /* Slightly higher when hovered */
}

/* Mobile menu toggle button */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    position: relative; /* Enable z-index */
    z-index: 1100; /* Higher than header */
}

/* Responsive breakpoints */
@media screen and (max-width: 1400px) {
    .nav-logo img {
        width: 80%;
    }
    
    .images-container {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .nav-buttons {
        gap: 2rem;
    }
}

@media screen and (max-width: 1200px) {
    .images-container {
        grid-template-columns: repeat(3, 1fr);
    }
    
    nav {
        padding-left: 2rem;
        padding-right: 2rem;
    }
    
    .nav-buttons {
        gap: 2rem;
    }
}

@media screen and (max-width: 1024px) {
    .nav-buttons {
        gap: 1.5rem;
    }
    
    nav {
        padding: 0 1rem;
    }
}

@media screen and (max-width: 900px) {
    .images-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.8rem;
    }
}

@media screen and (max-width: 840px) {
    /* Menu toggle button becomes visible */
    .menu-toggle {
        display: block;
    }
    
    /* Navigation buttons become a dropdown */
    .nav-buttons {
        position: fixed;
        top: var(--header-height, 0);
        left: 0;
        right: 0;
        background-color: var(--primary-color);
        flex-direction: column;
        align-items: center;
        padding: 1rem 0;
        gap: 1rem;
        border-bottom: 1px solid var(--border-color);
        transform: translateY(-100%);
        opacity: 0;
        transition: transform 0.3s ease, opacity 0.3s ease;
        pointer-events: none;
        z-index: 999; /* High but below header and toggle */
    }
    
    .nav-buttons.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .nav-buttons a {
        width: 100%;
        text-align: center;
        padding: 0.5rem 0;
    }
    
    nav {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .images-container {
        padding: 0.5rem;
    }
    
    .images-container img {
        height: 250px;
    }
}

@media screen and (max-width: 480px) {
    .nav-logo img {
        width: 60%;
    }
    
    .images-container {
        grid-template-columns: 1fr;
        gap: 0.8rem;
    }
    
    .images-container img {
        height: auto;
        max-height: 400px;
    }
    
    nav {
        padding: 0 0.5rem;
    }

    .nav-logo {
        margin: 0.25rem 0;
    }
    
    .footer-text {
        font-size: 0.8rem;
    }
}