/**
 * Header Layout Styles
 *
 * Modular header system with hamburger menu and customizable icons.
 *
 * @package Videohub360_Theme
 * @since 1.0.0
 */

/* ==========================================================================
   Header Base Styles
   ========================================================================== */

.site-header {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    z-index: 1000;
}

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

.site-header__inner {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.site-header__left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.site-header__center {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 600px;
    margin: 0 auto;
}

.site-header__right {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-left: auto;
}

/* Desktop Grid Layout (≥769px) - True centering solution */
@media (min-width: 769px) {
    .site-header__inner {
        display: grid;
        grid-template-columns: 1fr minmax(auto, 600px) 1fr;
        align-items: center;
        gap: 1.5rem;
        width: 100%;
    }
    
    .site-header__left {
        justify-self: start;
    }
    
    .site-header__center {
        justify-self: center;
        width: 100%;
        max-width: 600px;
        /* Remove flexbox properties - not needed with grid */
        flex: initial;
        margin: 0;
    }
    
    .site-header__right {
        justify-self: end;
        /* Remove flexbox hack - grid handles positioning */
        margin-left: 0;
    }
    
    /* Centered horizontal navigation styling */
    .site-header--nav-centered .site-header__center .main-navigation--horizontal {
        justify-content: center;
        width: 100%;
    }
    
    .site-header--nav-centered .site-header__center .main-navigation--horizontal ul {
        justify-content: center;
    }
}

/* ==========================================================================
   Horizontal Navigation
   ========================================================================== */

.main-navigation--horizontal {
    display: flex;
    align-items: center;
}

.main-navigation--horizontal ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 1.5rem;
}

.main-navigation--horizontal li {
    position: relative;
}

.main-navigation--horizontal a {
    color: var(--nav-link-color, var(--text-color));
    font-weight: 500;
    padding: 0.5rem 0;
    display: block;
    text-decoration: none;
    transition: color 0.2s;
}

.main-navigation--horizontal a:hover,
.main-navigation--horizontal a:focus,
.main-navigation--horizontal .current-menu-item > a {
    color: var(--primary-color);
}

/* ==========================================================================
   Hamburger Menu
   ========================================================================== */

.main-navigation--hamburger {
    position: relative;
    display: none; /* Hidden by default, shown on mobile or when hamburger mode is active */
}

.hamburger-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    color: var(--hamburger-icon-color, var(--text-color));
    transition: color 0.2s;
}

.hamburger-toggle:hover,
.hamburger-toggle:focus {
    color: var(--hamburger-active-color, var(--primary-color));
}

.hamburger-icon {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 24px;
    height: 18px;
    justify-content: center;
}

.hamburger-line {
    display: block;
    width: 100%;
    height: 2px;
    background-color: currentColor;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s;
    transform-origin: center;
}

/* Hamburger icon animation when open */
.hamburger-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.hamburger-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

.hamburger-label {
    font-weight: 500;
    font-size: 0.875rem;
}

/* Hamburger Menu Panel */
.hamburger-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    pointer-events: none;
}

.hamburger-menu[aria-hidden="false"] {
    pointer-events: auto;
}

.hamburger-menu__backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
    opacity: 0;
    transition: opacity 0.3s;
}

.hamburger-menu[aria-hidden="false"] .hamburger-menu__backdrop {
    opacity: 1;
}

.hamburger-menu__panel {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 320px;
    max-width: 85%;
    background-color: var(--hamburger-bg-color, var(--bg-color));
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.hamburger-menu[aria-hidden="false"] .hamburger-menu__panel {
    transform: translateX(0);
}

.hamburger-menu__header {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.hamburger-close {
    background: none;
    border: none;
    font-size: 2rem;
    line-height: 1;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    color: var(--text-light);
    transition: color 0.2s;
}

.hamburger-close:hover,
.hamburger-close:focus {
    color: var(--text-color);
}

.hamburger-menu__body {
    flex: 1;
    padding: 1.5rem;
}

.hamburger-menu__body ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.hamburger-menu__body li {
    margin-bottom: 0.5rem;
}

.hamburger-menu__body a {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--hamburger-text-color, var(--text-color));
    text-decoration: none;
    border-radius: 6px;
    transition: background-color 0.2s, color 0.2s;
}

.hamburger-menu__body a:hover,
.hamburger-menu__body a:focus,
.hamburger-menu__body .current-menu-item > a {
    background-color: var(--hamburger-hover-bg-color, var(--bg-light));
    color: var(--hamburger-active-color, var(--primary-color));
}

/* Authentication Section in Hamburger Menu (Mobile Only) */
.hamburger-menu__auth-section {
    margin-bottom: 1.5rem;
}

.hamburger-auth-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 1rem;
    margin-bottom: 0.75rem;
    color: var(--text-color);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s ease;
    border: 2px solid transparent;
}

.hamburger-auth-link--signin {
    background-color: var(--primary-color);
    color: var(--bg-color);
}

.hamburger-auth-link--signin:hover,
.hamburger-auth-link--signin:focus {
    background-color: var(--secondary-color);
    color: var(--bg-color);
    transform: translateX(4px);
}

.hamburger-auth-link--register {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.hamburger-auth-link--register:hover,
.hamburger-auth-link--register:focus {
    background-color: var(--primary-color);
    color: var(--bg-color);
    transform: translateX(4px);
}

.hamburger-auth-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.hamburger-menu__divider {
    height: 1px;
    background-color: var(--border-color);
    margin: 1rem 0 1.5rem;
}

/* Hide auth section on desktop (≥769px) - auth buttons stay in header */
@media (min-width: 769px) {
    .hamburger-menu__auth-section {
        display: none;
    }
}

/* Focus visible styles for keyboard navigation */
.hamburger-auth-link:focus-visible {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .hamburger-auth-link {
        transition: none;
    }
    
    .hamburger-auth-link:hover,
    .hamburger-auth-link:focus {
        transform: none;
    }
}

/* Prevent body scroll when menu is open */
body.hamburger-menu-open {
    overflow: hidden;
}

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

.header-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
    position: relative;
    text-decoration: none;
}

.header-icon:hover,
.header-icon:focus {
    background-color: var(--bg-light);
    color: var(--text-color);
}

.header-icon svg {
    width: 24px;
    height: 24px;
}

/* Cart Badge */
.header-cart-count {
    position: absolute;
    top: 0;
    right: 0;
    background-color: var(--error-color);
    color: var(--bg-color);
    font-size: 0.625rem;
    font-weight: 600;
    padding: 0.125rem 0.375rem;
    border-radius: 10px;
    line-height: 1;
    min-width: 18px;
    text-align: center;
}

/* ==========================================================================
   Search Modal
   ========================================================================== */

.header-search-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    display: none;
}

.header-search-modal[aria-hidden="false"] {
    display: block;
}

.header-search-modal__backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
}

.header-search-modal__content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--bg-color);
    border-radius: 8px;
    padding: 2rem;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 20px 25px rgba(0, 0, 0, 0.1);
}

.header-search-modal .search-form {
    display: flex;
    gap: 0.5rem;
}

.header-search-modal input[type="search"] {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
}

.header-search-modal button[type="submit"] {
    padding: 0.75rem 1.5rem;
    background-color: var(--primary-color);
    color: var(--bg-color);
    border: none;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s;
}

.header-search-modal button[type="submit"]:hover {
    background-color: var(--secondary-color);
}

.header-search-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 2rem;
    line-height: 1;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    color: var(--text-light);
}

.header-search-close:hover,
.header-search-close:focus {
    color: var(--text-color);
}

/* Screen reader text */
.screen-reader-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

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

@media (max-width: 768px) {
    .site-header__inner {
        gap: 1rem;
    }
    
    .site-header__left {
        gap: 1rem;
    }
    
    /* On mobile, center zone only contains the small search icon */
    .site-header__center {
        flex: 0 0 auto; /* Don't grow or shrink, just fit content */
        max-width: none;
        margin: 0;
    }
    
    .site-header__right {
        gap: 0.5rem;
        margin-left: auto;
    }
    
    /* Force hamburger menu on mobile */
    .main-navigation--horizontal {
        display: none !important;
    }
    
    .main-navigation--hamburger {
        display: block !important;
    }
    
    /* Hide "Menu" label on mobile */
    .hamburger-label {
        display: none;
    }
    
    /* Adjust hamburger panel width on mobile */
    .hamburger-menu__panel {
        max-width: 90%;
    }
    
    /* Smaller header icons on mobile */
    .header-icon {
        width: 36px;
        height: 36px;
    }
    
    .header-icon svg {
        width: 20px;
        height: 20px;
    }
}

/* Desktop: Show hamburger only if hamburger mode is selected */
@media (min-width: 769px) {
    .site-header--hamburger .main-navigation--hamburger {
        display: block;
    }
    
    .site-header--hamburger .main-navigation--horizontal {
        display: none !important;
    }
}