/**
 * MultiBuilder Theme — Main CSS (supplementary to style.css)
 *
 * Header, footer, single post, and component-specific styles.
 *
 * @package MultiBuilder
 */

/* ==========================================================================
   Header
   ========================================================================== */

.mb-site-header {
    position: relative;
    z-index: 1000;
    background-color: var(--header-bg, var(--mb-color-white));
    color: var(--header-text, var(--mb-color-text));
    box-shadow: var(--mb-shadow-sm);
    transition: transform var(--mb-transition-base), box-shadow var(--mb-transition-base), background-color var(--mb-transition-base);
}

.mb-header-sticky {
    position: sticky;
    top: 0;
}

.mb-header--scrolled {
    box-shadow: var(--mb-shadow-md);
    background-color: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.mb-header--hidden {
    transform: translateY(-100%);
}

/* Header inner layout */
.mb-header-inner {
    display: flex;
    align-items: center;
    min-height: var(--mb-header-height);
    padding: 0 var(--mb-spacing-lg);
    max-width: var(--mb-container-width);
    margin: 0 auto;
}

/* Layout 1: Logo Left + Menu Right */
.mb-header-layout-logo-left .mb-header-inner {
    justify-content: space-between;
}

/* Layout 2: Logo Center + Menu Below */
.mb-header-layout-logo-center-below .mb-header-inner {
    flex-direction: column;
    align-items: center;
    padding: var(--mb-spacing-md) var(--mb-spacing-lg);
}

.mb-header-layout-logo-center-below .mb-header-nav {
    margin-top: var(--mb-spacing-sm);
}

/* Layout 3: Logo Center + Menu Split */
.mb-header-layout-logo-center-split .mb-header-inner {
    justify-content: center;
    gap: var(--mb-spacing-xl);
}

/* Logo */
.mb-site-logo {
    flex-shrink: 0;
}

.mb-site-logo a {
    display: flex;
    align-items: center;
    gap: var(--mb-spacing-sm);
    color: var(--header-text, var(--mb-color-black));
    text-decoration: none;
}

.mb-site-logo img {
    max-height: 50px;
    width: auto;
}

.mb-site-title {
    font-size: var(--mb-font-size-xl);
    font-weight: var(--mb-font-weight-bold);
    margin: 0;
    line-height: 1.2;
}

.mb-site-description {
    font-size: var(--mb-font-size-xs);
    color: var(--mb-color-text-light);
    margin: 0;
}

/* ==========================================================================
   Primary Navigation
   ========================================================================== */

.mb-header-nav {
    display: none;
}

@media (min-width: 1024px) {
    .mb-header-nav {
        display: block;
    }
}

.mb-primary-menu {
    display: flex;
    align-items: center;
    gap: 0;
    list-style: none;
    margin: 0;
    padding: 0;
}

.mb-primary-menu > .menu-item {
    position: relative;
}

.mb-primary-menu > .menu-item > a {
    display: flex;
    align-items: center;
    gap: var(--mb-spacing-xs);
    padding: var(--mb-spacing-md) var(--mb-spacing-lg);
    color: var(--header-text, var(--mb-color-text));
    font-weight: var(--mb-font-weight-medium);
    font-size: var(--mb-font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: color var(--mb-transition-fast);
    white-space: nowrap;
}

.mb-primary-menu > .menu-item > a:hover,
.mb-primary-menu > .menu-item.current-menu-item > a {
    color: var(--mb-color-primary);
}

/* Dropdown indicator */
.mb-primary-menu > .menu-item-has-children > a::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid currentColor;
    transition: transform var(--mb-transition-fast);
}

.mb-primary-menu > .menu-item-has-children:hover > a::after {
    transform: rotate(180deg);
}

/* Dropdown sub-menu */
.mb-primary-menu .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: var(--mb-color-white);
    border-radius: 0 0 var(--mb-border-radius-md) var(--mb-border-radius-md);
    box-shadow: var(--mb-shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--mb-transition-base);
    list-style: none;
    padding: var(--mb-spacing-sm) 0;
    z-index: 100;
}

.mb-primary-menu > .menu-item:hover > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.mb-primary-menu .sub-menu .menu-item a {
    display: block;
    padding: var(--mb-spacing-sm) var(--mb-spacing-lg);
    color: var(--mb-color-text);
    font-size: var(--mb-font-size-sm);
    transition: all var(--mb-transition-fast);
}

.mb-primary-menu .sub-menu .menu-item a:hover {
    color: var(--mb-color-primary);
    background-color: var(--mb-color-bg-alt);
    padding-left: calc(var(--mb-spacing-lg) + 4px);
}

/* Nested sub-menus */
.mb-primary-menu .sub-menu .sub-menu {
    top: 0;
    left: 100%;
    border-radius: var(--mb-border-radius-md);
}

/* ==========================================================================
   Header Actions (Search, Cart, Mobile Toggle)
   ========================================================================== */

.mb-header-actions {
    display: flex;
    align-items: center;
    gap: var(--mb-spacing-sm);
}

.mb-header-action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    color: var(--header-text, var(--mb-color-text));
    cursor: pointer;
    border-radius: var(--mb-border-radius-full);
    transition: all var(--mb-transition-fast);
    position: relative;
}

.mb-header-action-btn:hover {
    background-color: var(--mb-color-bg-alt);
    color: var(--mb-color-primary);
}

.mb-header-action-btn svg {
    width: 20px;
    height: 20px;
}

/* Cart count badge */
.mb-cart-count {
    position: absolute;
    top: 4px;
    right: 4px;
    min-width: 18px;
    height: 18px;
    padding: 0 4px;
    background: var(--mb-color-primary);
    color: var(--mb-color-white);
    font-size: 10px;
    font-weight: var(--mb-font-weight-bold);
    line-height: 18px;
    text-align: center;
    border-radius: var(--mb-border-radius-full);
}

/* Mobile menu toggle - shown on mobile only */
.mb-mobile-menu-toggle {
    display: flex;
}

@media (min-width: 1024px) {
    .mb-mobile-menu-toggle {
        display: none;
    }
}

/* Hamburger icon */
.mb-hamburger {
    width: 22px;
    height: 16px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.mb-hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: currentColor;
    border-radius: 1px;
    transition: all var(--mb-transition-base);
}

/* Search overlay */
.mb-search-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--mb-transition-base);
}

.mb-search-overlay--active {
    opacity: 1;
    visibility: visible;
}

.mb-search-overlay form {
    width: 90%;
    max-width: 600px;
}

.mb-search-overlay input[type="search"] {
    width: 100%;
    padding: var(--mb-spacing-lg);
    font-size: var(--mb-font-size-2xl);
    background: transparent;
    border: none;
    border-bottom: 2px solid rgba(255, 255, 255, 0.3);
    color: var(--mb-color-white);
    text-align: center;
}

.mb-search-overlay input[type="search"]:focus {
    border-bottom-color: var(--mb-color-primary);
    box-shadow: none;
    outline: none;
}

.mb-search-overlay input[type="search"]::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.mb-site-footer {
    background-color: var(--footer-bg, var(--mb-color-black));
    color: rgba(255, 255, 255, 0.8);
}

.mb-site-footer a {
    color: rgba(255, 255, 255, 0.8);
}

.mb-site-footer a:hover {
    color: var(--mb-color-white);
}

.mb-footer-widgets {
    padding: var(--mb-spacing-3xl) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mb-footer-columns {
    display: grid;
    gap: var(--mb-spacing-xl);
}

.mb-footer-columns-1 { grid-template-columns: 1fr; }
.mb-footer-columns-2 { grid-template-columns: repeat(2, 1fr); }
.mb-footer-columns-3 { grid-template-columns: repeat(3, 1fr); }
.mb-footer-columns-4 { grid-template-columns: repeat(4, 1fr); }

.mb-footer-column .widget {
    background: transparent;
    box-shadow: none;
    padding: 0;
}

.mb-footer-column .widget-title {
    color: var(--mb-color-white);
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

.mb-footer-column .widget ul li {
    border-bottom-color: rgba(255, 255, 255, 0.08);
}

.mb-footer-bottom {
    padding: var(--mb-spacing-lg) 0;
}

.mb-footer-bottom-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--mb-spacing-md);
}

.mb-copyright {
    font-size: var(--mb-font-size-sm);
    color: rgba(255, 255, 255, 0.5);
}

.mb-footer-menu {
    display: flex;
    gap: var(--mb-spacing-lg);
    list-style: none;
}

.mb-footer-menu a {
    font-size: var(--mb-font-size-sm);
    color: rgba(255, 255, 255, 0.5);
}

.mb-footer-menu a:hover {
    color: var(--mb-color-white);
}

/* ==========================================================================
   Back to Top Button
   ========================================================================== */

.mb-back-to-top {
    position: fixed;
    bottom: var(--mb-spacing-xl);
    right: var(--mb-spacing-xl);
    z-index: 999;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--mb-color-primary), #8b7cf7);
    color: var(--mb-color-white);
    border: none;
    border-radius: var(--mb-border-radius-full);
    cursor: pointer;
    box-shadow: var(--mb-shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--mb-transition-base);
}

.mb-back-to-top--visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.mb-back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--mb-shadow-lg);
}

/* ==========================================================================
   Single Post Styles
   ========================================================================== */

.mb-single-post .mb-post-featured-image {
    margin-bottom: var(--mb-spacing-xl);
    border-radius: var(--mb-border-radius-lg);
    overflow: hidden;
}

.mb-single-post .mb-post-featured-image img {
    width: 100%;
    height: auto;
}

.mb-post-header {
    margin-bottom: var(--mb-spacing-2xl);
}

.mb-post-meta {
    display: flex;
    align-items: center;
    gap: var(--mb-spacing-md);
    margin-bottom: var(--mb-spacing-md);
    font-size: var(--mb-font-size-sm);
}

.mb-post-category a {
    display: inline-block;
    padding: 0.2em 0.75em;
    background: linear-gradient(135deg, var(--mb-color-primary), #8b7cf7);
    color: var(--mb-color-white);
    border-radius: var(--mb-border-radius-sm);
    font-size: var(--mb-font-size-xs);
    font-weight: var(--mb-font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.mb-post-date {
    color: var(--mb-color-text-light);
}

.mb-post-title {
    font-size: var(--mb-font-size-4xl);
    margin-bottom: var(--mb-spacing-lg);
}

.mb-post-author {
    display: flex;
    align-items: center;
    gap: var(--mb-spacing-md);
}

.mb-author-avatar {
    border-radius: var(--mb-border-radius-full);
}

.mb-author-info {
    display: flex;
    flex-direction: column;
}

.mb-author-name {
    font-weight: var(--mb-font-weight-semibold);
    color: var(--mb-color-black);
}

.mb-reading-time {
    font-size: var(--mb-font-size-sm);
    color: var(--mb-color-text-light);
}

/* Post content */
.mb-post-content {
    font-size: var(--mb-font-size-lg);
    line-height: 1.8;
}

.mb-post-content h2,
.mb-post-content h3,
.mb-post-content h4 {
    margin-top: var(--mb-spacing-2xl);
}

.mb-post-content img {
    border-radius: var(--mb-border-radius-md);
    margin: var(--mb-spacing-xl) 0;
}

.mb-post-content ul,
.mb-post-content ol {
    padding-left: var(--mb-spacing-xl);
    margin-bottom: var(--mb-spacing-md);
}

.mb-post-content ul {
    list-style: disc;
}

.mb-post-content ol {
    list-style: decimal;
}

.mb-post-content li {
    margin-bottom: var(--mb-spacing-xs);
}

/* Post footer */
.mb-post-footer {
    margin-top: var(--mb-spacing-2xl);
    padding-top: var(--mb-spacing-xl);
    border-top: 1px solid var(--mb-color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--mb-spacing-md);
}

.mb-post-tags {
    display: flex;
    align-items: center;
    gap: var(--mb-spacing-sm);
    flex-wrap: wrap;
}

.mb-tags-label {
    font-weight: var(--mb-font-weight-semibold);
    font-size: var(--mb-font-size-sm);
}

.mb-post-tags a {
    display: inline-block;
    padding: 0.25em 0.75em;
    background: var(--mb-color-bg-alt);
    color: var(--mb-color-text);
    border-radius: var(--mb-border-radius-sm);
    font-size: var(--mb-font-size-sm);
    transition: all var(--mb-transition-fast);
}

.mb-post-tags a:hover {
    background: var(--mb-color-primary);
    color: var(--mb-color-white);
}

.mb-post-share {
    display: flex;
    align-items: center;
    gap: var(--mb-spacing-sm);
}

.mb-share-label {
    font-weight: var(--mb-font-weight-semibold);
    font-size: var(--mb-font-size-sm);
}

.mb-share-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--mb-color-bg-alt);
    border-radius: var(--mb-border-radius-full);
    color: var(--mb-color-text-light);
    transition: all var(--mb-transition-fast);
}

.mb-share-link:hover {
    background: var(--mb-color-primary);
    color: var(--mb-color-white);
    transform: translateY(-2px);
}

/* Post navigation */
.mb-post-navigation {
    margin-top: var(--mb-spacing-2xl);
    padding: var(--mb-spacing-xl) 0;
    border-top: 1px solid var(--mb-color-border);
}

.mb-post-navigation .nav-links {
    display: flex;
    justify-content: space-between;
    gap: var(--mb-spacing-xl);
}

.mb-post-navigation .nav-previous,
.mb-post-navigation .nav-next {
    flex: 1;
}

.mb-post-navigation .nav-next {
    text-align: right;
}

.mb-nav-label {
    display: block;
    font-size: var(--mb-font-size-xs);
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--mb-color-text-light);
    margin-bottom: var(--mb-spacing-xs);
}

.mb-nav-title {
    display: block;
    font-weight: var(--mb-font-weight-semibold);
    color: var(--mb-color-text);
}

/* ==========================================================================
   Page Header (Archives)
   ========================================================================== */

.mb-page-header,
.mb-archive-header,
.mb-search-header {
    padding: var(--mb-spacing-2xl) 0;
    margin-bottom: var(--mb-spacing-xl);
    border-bottom: 1px solid var(--mb-color-border);
}

.mb-page-title {
    font-size: var(--mb-font-size-4xl);
    margin-bottom: var(--mb-spacing-sm);
}

.mb-archive-description {
    font-size: var(--mb-font-size-lg);
    color: var(--mb-color-text-light);
    max-width: 600px;
}

.mb-search-query {
    color: var(--mb-color-primary);
}

/* ==========================================================================
   Scroll Animations
   ========================================================================== */

.mb-animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.mb-animate-on-scroll.mb-animated {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1023px) {
    .mb-header-nav {
        display: none;
    }

    .mb-header-inner {
        padding: 0 var(--mb-spacing-md);
    }
}

@media (max-width: 768px) {
    .mb-footer-columns-2,
    .mb-footer-columns-3,
    .mb-footer-columns-4 {
        grid-template-columns: 1fr;
    }

    .mb-footer-bottom-inner {
        flex-direction: column;
        text-align: center;
    }

    .mb-post-footer {
        flex-direction: column;
        align-items: flex-start;
    }

    .mb-post-navigation .nav-links {
        flex-direction: column;
    }

    .mb-post-navigation .nav-next {
        text-align: left;
    }
}