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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #fff;
}

/* Navbar Styles */
.navbar {
    position: fixed;
    left: 0;
    top: 0;
    width: 250px;
    height: 100vh;
    background: #2c3e50;
    padding: 2rem 0;
    z-index: 1000;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 1rem;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #fff;
    margin: 3px 0;
    transition: 0.3s;
}

.nav-links {
    list-style: none;
    padding: 0;
}

.nav-links li {
    margin: 0;
}

.nav-links a {
    display: block;
    color: #ecf0f1;
    text-decoration: none;
    padding: 1rem 2rem;
    transition: background 0.3s;
}

.nav-links a:hover {
    background: #34495e;
}

.submenu {
    list-style: none;
    padding-left: 1rem;
    display: block;
}

.submenu a {
    padding: 0.75rem 2rem;
    font-size: 0.9rem;
}

/* Main Content */
.content {
    margin-left: 250px;
    padding: 2rem;
    min-height: 100vh;
}

/* Gallery Container */
.gallery-container {
    margin: 2rem 0;
}

/* Mobile Styles */
@media (max-width: 768px) {
    .navbar {
        position: fixed;
        top: 0;
        right: auto;
        left: 0;
        width: 100%;
        height: auto;
        max-height: 100vh;
        overflow-y: auto;
        padding: 0;
    }

    .nav-toggle {
        display: flex;
        margin-right: auto;
        background: #2c3e50;
    }

    .nav-links {
        display: none;
        width: 100%;
        background: #2c3e50;
    }

    .nav-links.active {
        display: block;
    }

    .nav-links a {
        padding: 1rem;
    }

    .has-submenu {
        display: block;
    }

    .submenu {
        padding-left: 0;
        display: block !important;
        visibility: visible !important;
        opacity: 1 !important;
    }

    .nav-links.active .submenu {
        display: block !important;
        visibility: visible !important;
        opacity: 1 !important;
    }

    .nav-links.active .submenu li {
        display: block;
    }

    .submenu a {
        padding-left: 2rem;
        display: block;
    }

    .content {
        margin-left: 0;
        margin-top: 60px;
        padding: 1rem;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-7px, 6px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(45deg) translate(-7px, -6px);
    }
}

/* Typography */
h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #34495e;
}

p {
    margin-bottom: 1rem;
    max-width: 800px;
}