* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: sans-serif; line-height: 1.5; color: #333; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 15px; }


.site-header { background: #222; color: #fff; padding: 15px 0; position: relative; }
.header-flex { display: flex; justify-content: space-between; align-items: center; }


.main-nav {
    display: none; 
    position: absolute;
    top: 100%; left: 0; width: 100%;
    background: #333; z-index: 1000;
}

.main-nav ul { list-style: none; }
.main-nav ul li a { display: block; padding: 15px; color: #fff; text-decoration: none; border-bottom: 1px solid #444; }


.main-nav ul li ul { background: #444; display: none; }
.main-nav ul li:hover > ul { display: block; }
.main-nav ul li ul li a { padding-left: 30px; font-size: 0.9em; }


.nav-toggle { display: none; }
.nav-toggle:checked ~ .main-nav { display: block; }
.nav-toggle-label { cursor: pointer; padding: 10px; }
.nav-toggle-label span, .nav-toggle-label span::before, .nav-toggle-label span::after {
    display: block; width: 25px; height: 2px; background: #fff; position: relative; transition: .2s;
}
.nav-toggle-label span::before, .nav-toggle-label span::after { content: ''; position: absolute; }
.nav-toggle-label span::before { top: -8px; }
.nav-toggle-label span::after { bottom: -8px; }


@media (min-width: 992px) {
    .nav-toggle-label { display: none; }
    .main-nav { display: block; position: static; background: transparent; width: auto; }
    .main-nav ul { display: flex; }
    .main-nav ul li a { border: none; padding: 10px 20px; }
    

    .main-nav ul li { position: relative; }
    .main-nav ul li ul {
        position: absolute; top: 100%; left: 0; min-width: 200px;
        display: none; box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    }
    .main-nav ul li:hover > ul { display: block; }
}


.main-content { display: grid; grid-template-columns: 1fr; gap: 20px; padding: 30px 15px; }
@media (min-width: 768px) {
    .main-content { grid-template-columns: 3fr 1fr; }
}
.site-footer { background: #f4f4f4; padding: 20px 0; text-align: center; }