/* Header Styling */
.site-header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
    border-bottom: 1px solid rgba(0, 0, 0, 0.03);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 90px; /* Slightly taller for breathing room */
}

.site-logo a {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    font-size: 1.4rem;
    color: var(--primary-color);
    letter-spacing: -0.5px;
    transition: transform 0.3s ease;
}

.site-logo a:hover {
    transform: scale(1.02);
}

.main-navigation ul {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 15px; /* Giảm khoảng cách giữa các mục để vừa trên 1 hàng */
}

.main-navigation li {
    display: flex;
    align-items: center;
    gap: 8px;
}

.main-navigation a {
    color: var(--text-color);
    font-weight: 600;
    font-size: 0.85rem; /* Thu nhỏ chữ một chút */
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    padding: 8px 14px; /* Giảm padding để tiết kiệm diện tích */
    border-radius: 30px;
    transition: all 0.3s ease;
    display: inline-block;
    white-space: nowrap; /* Bắt buộc không được rớt dòng */
}

.main-navigation a:hover {
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 4px 10px rgba(46, 125, 50, 0.3);
}

/* Highlighted background for active item */
.main-navigation li.active a,
.main-navigation li.current-menu-item a,
.main-navigation li.current_page_item a {
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 4px 10px rgba(46, 125, 50, 0.3);
}

.main-navigation li.active a:hover,
.main-navigation li.current-menu-item a:hover,
.main-navigation li.current_page_item a:hover {
    background-color: var(--primary-hover);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.login-link {
    font-weight: 600;
    color: var(--text-color);
    font-size: 0.95rem;
}

.login-link:hover {
    color: var(--primary-color);
}

/* Header Search */
.header-search {
    flex: 1;
    max-width: 200px;
    margin: 0 15px;
}

.search-form {
    display: flex;
    align-items: center;
    position: relative;
    border: 1px solid #ccc;
    border-radius: 25px;
    background-color: #fff;
    overflow: hidden;
    transition: border-color 0.3s;
}

.search-form:focus-within {
    border-color: var(--primary-color);
}

.search-field {
    flex: 1;
    border: none;
    padding: 10px 15px 10px 20px;
    font-size: 0.95rem;
    outline: none;
    background: transparent;
    color: var(--text-color);
}

.search-field::placeholder {
    color: #999;
}

.search-submit {
    background: none;
    border: none;
    padding: 0 15px 0 10px;
    cursor: pointer;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s;
}

.search-submit:hover {
    transform: scale(1.1);
}

/* Mobile Responsiveness */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

@media (max-width: 768px) {
    .site-header .container {
        flex-wrap: wrap;
        height: auto;
        padding: 10px 15px;
    }
    
    .site-logo {
        flex: 1;
        min-width: 120px;
        order: 1;
    }
    
    .site-logo svg {
        width: 120px;
        height: auto;
    }
    
    .mobile-menu-toggle {
        display: block;
        order: 2;
        margin-left: auto;
    }
    
    .header-search {
        flex: 0 0 100%;
        max-width: 100%;
        margin: 15px 0 5px 0;
        order: 3;
    }
    
    .main-navigation {
        display: none;
        flex: 0 0 100%;
        order: 4;
        width: 100%;
        margin-top: 15px;
    }
    
    .main-navigation.show-mobile-menu {
        display: block;
    }
    
    .main-navigation ul {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .main-navigation li {
        width: 100%;
    }
    
    .main-navigation a {
        display: block;
        width: 100%;
        padding: 12px 15px;
        border-radius: 8px;
        background-color: #f9f9f9;
        text-align: left;
    }
    
    .main-navigation a:hover,
    .main-navigation li.active a {
        background-color: var(--primary-color);
        color: white;
    }
}