header {
    background-color: #1f1f1f;
    text-align: center;
    padding: 10px 0;
    position: sticky;
    top: 0;
    height: 200px;
    width: 100vw;
    z-index: 1000;
    box-shadow: 0px 2px 5px rgba(0, 0, 0, 0.5);
}

header img {
    width: 100vw;
    max-height: 100%;
    display: block;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #121212;
    color: #f5f5f5;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

nav {
    width: 150px;
    background-color: #242424;
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.5);
    flex-shrink: 0;
    height: auto;
}

nav ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
}

nav ul li {
    margin: 0;
}

nav ul li a {
    display: block;
    padding: 15px;
    text-decoration: none;
    color: #f5f5f5;
    border-bottom: 1px solid #333;
}

nav ul li a:hover {
    background-color: #444;
}

main {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    box-sizing: border-box;
}

footer {
    background-color: #1f1f1f;
    color: #a9a9a9;
    text-align: center;
    padding: 10px 0;
    flex-shrink: 0;
    margin-top: auto;
}

/* MOBILE MENU TOOLBAR */
.mobile-menu-bar {
    display: none;
}

/* MOBILE MENU TOGGLE BUTTON */
.mobile-menu-toggle {
    display: none;
    background-color: transparent;
    border: none;
    cursor: pointer;
    color: #FFD700;
    font-size: 18px;
    padding: 12px 16px;
    width: auto;
    height: 100%;
    font-weight: bold;
    transition: all 0.2s ease;
}

.mobile-menu-toggle:hover {
    background-color: rgba(255, 215, 0, 0.1);
    color: #ffcc00;
}

.mobile-menu-toggle:active {
    background-color: rgba(255, 215, 0, 0.2);
}

/* MOBILE RESPONSIVE DESIGN - Tablets (768px and below) */
@media (max-width: 768px) {
    header {
        height: 140px;
        padding: 8px 0;
    }

    .mobile-menu-bar {
        display: flex;
        align-items: center;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .content {
        flex-direction: column;
        position: relative;
        margin-top: 50px;
    }

    main {
        padding: 16px;
        flex: 1;
    }
}

/* MOBILE RESPONSIVE DESIGN - Small Phones (480px and below) */
@media (max-width: 480px) {
    header {
        height: 110px;
        padding: 6px 0;
    }

    header img {
        object-fit: cover;
        width: 100%;
    }

    .mobile-menu-bar {
        top: 110px;
        height: 48px;
    }

    .content {
        margin-top: 48px;
    }

    nav {
        top: 158px !important;
        max-height: calc(100vh - 158px) !important;
    }

    .mobile-menu-toggle {
        font-size: 16px;
        padding: 10px 14px;
    }

    main {
        padding: 12px;
    }

    nav ul li a {
        padding: 12px;
        font-size: 14px;
    }

    footer {
        padding: 8px 0;
        font-size: 12px;
    }
}