/* Header Styles */
.header {
    background-color: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-top {
    background-color: var(--primary-color);
    color: white;
    padding: calc(var(--element-spacing) / 2) 0;
}

.header-main {
    padding: var(--element-spacing) 0;
}

.header-grid {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: var(--element-spacing);
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-img {
    height: 3rem;
    width: auto;
}

.logo h1 {
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    margin: 0;
}

/* Navigation */
.nav-list {
    display: flex;
    gap: var(--element-spacing);
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav-item a {
    color: var(--text-color);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.nav-item a:hover {
    background-color: var(--primary-color);
    color: white;
}

/* Search Bar */
.search-bar {
    display: flex;
    gap: 0.5rem;
}

.search-input {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    width: 100%;
    max-width: 300px;
}

/* Mobile menu button */
.menu-toggle {
    display: none;
    border: none;
    background: none;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--primary-color);
    margin: 4px 0;
    transition: 0.3s;
}

/* Responsive styles */
@media screen and (max-width: 768px) {
    .header-grid {
        grid-template-columns: auto auto;
    }
    
    .menu-toggle {
        display: block;
        order: 1;
    }
    
    .logo {
        order: 2;
    }
    
    .nav-list {
        order: 4;
        grid-column: 1 / -1;
        flex-direction: column;
        background-color: var(--bg-light);
        padding: 1rem;
        display: none;
    }
    
    .nav-list.active {
        display: flex;
    }
    
    .search-bar {
        order: 3;
        grid-column: 1 / -1;
        max-width: none;
    }
    
    .search-input {
        max-width: none;
    }
}

@media screen and (max-width: 576px) {
    .header-top {
        display: none;
    }
    
    .logo h1 {
        font-size: var(--font-size-lg);
    }
    
    .logo-img {
        height: 2.5rem;
    }
    
    .search-bar {
        flex-wrap: wrap;
    }
}