/* === Header Styles === */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: white;
    border-bottom: 1px solid var(--border-light);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 32px;
}

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

.logo-text {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -1px;
}

.main-nav {
    display: flex;
    gap: 24px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    padding: 4px 0;
}

.nav-link:hover {
    color: var(--text);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn-estimate {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--primary);
    color: white;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
}

.btn-estimate:hover {
    background: var(--primary-dark);
}

/* Category tabs */
.header-categories {
    border-top: 1px solid var(--border-light);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.header-categories::-webkit-scrollbar {
    display: none;
}

.categories-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    gap: 4px;
    white-space: nowrap;
}

.cat-tab {
    display: inline-block;
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    transition: var(--transition);
}

.cat-tab:hover {
    color: var(--text);
}

.cat-tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 600;
}

/* Mobile */
.mobile-bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    border-top: 1px solid var(--border);
    z-index: 100;
    padding: 6px 0 env(safe-area-inset-bottom);
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 6px;
    font-size: 11px;
    color: var(--text-light);
    transition: var(--transition);
}

.mobile-nav-item.active {
    color: var(--primary);
}

.mobile-nav-item svg {
    width: 20px;
    height: 20px;
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
    }

    .btn-estimate span {
        display: none;
    }

    .mobile-bottom-nav {
        display: flex;
        justify-content: space-around;
    }

    body {
        padding-bottom: 80px;
    }
}