/**
 * Header & Mega Menu Navigation (Light SaaS Theme)
 * Inspired by modern tabbed mega-menus (Hostinger style) without emojis
 */

.site-header {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.site-header.scrolled {
    box-shadow: var(--shadow-sm);
    background: rgba(255, 255, 255, 0.98);
}

.nav-container {
    max-width: var(--max-width-container);
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

/* Brand Logo */
.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.nav-brand img {
    height: 42px;
    width: auto;
    object-fit: contain;
}

/* Desktop Navigation Menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
    height: 100%;
}

.nav-item {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 14px;
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text-heading);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    cursor: pointer;
    background: transparent;
    border: none;
}

.nav-link:hover,
.nav-item:hover > .nav-link,
.nav-item.is-active > .nav-link {
    color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.nav-link svg.arrow-icon {
    width: 14px;
    height: 14px;
    transition: transform var(--transition-fast);
    stroke: currentColor;
    stroke-width: 2.2;
}

.nav-item:hover .nav-link svg.arrow-icon,
.nav-item.is-active .nav-link svg.arrow-icon {
    transform: rotate(180deg);
}

.nav-item.has-mega {
    position: static;
}

/* ========================================================
   MEGA DROPDOWN CONTAINER (Light Theme)
   ======================================================== */
.mega-dropdown {
    position: absolute;
    top: calc(100% + 4px);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    width: 1140px;
    max-width: calc(100vw - 32px);
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.18), 0 0 0 1px rgba(15, 23, 42, 0.05);
    padding: 24px;
    display: grid;
    grid-template-columns: 180px minmax(480px, 1fr) 260px;
    gap: 24px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 180ms ease, transform 180ms ease, visibility 180ms;
    z-index: 1050;
}

/* Open Mega Dropdown on Hover or Active Class */
.nav-item.has-mega:hover .mega-dropdown,
.nav-item.has-mega.is-active .mega-dropdown {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

/* Column 1: Categories / Sidebar Tabs */
.mega-sidebar {
    border-right: 1px solid var(--color-border);
    padding-right: 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.mega-sidebar-title {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 700;
    color: var(--color-text-subtle);
    padding: 0 12px 10px;
}

.mega-tab-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 10px 12px;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-muted);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.mega-tab-btn:hover {
    color: var(--color-text-heading);
    background-color: var(--color-bg-muted);
}

.mega-tab-btn.active {
    color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.mega-tab-btn svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    flex-shrink: 0;
}

/* Column 2: Items Grid */
.mega-content {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.mega-content-section-title {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 700;
    color: var(--color-text-subtle);
    margin-bottom: -6px;
}

.mega-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.mega-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.mega-item:hover {
    background-color: var(--color-bg-muted);
    transform: translateY(-1px);
}

.mega-icon-box {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: var(--color-primary-light);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--transition-fast);
}

.mega-item:hover .mega-icon-box {
    background: var(--color-primary);
    color: #FFFFFF;
}

.mega-icon-box.accent-box {
    background: var(--color-accent-light);
    color: var(--color-accent);
}

.mega-item:hover .mega-icon-box.accent-box {
    background: var(--color-accent);
    color: #FFFFFF;
}

.mega-icon-box svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
}

.mega-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.mega-title-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: nowrap;
}

.mega-item-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-text-heading);
    white-space: nowrap;
}

.mega-item:hover .mega-item-title {
    color: var(--color-primary);
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-radius: var(--radius-full);
    white-space: nowrap;
    flex-shrink: 0;
    line-height: 1.3;
}

.badge-ai {
    background-color: #EDE9FE;
    color: #6D28D9;
}

.badge-new {
    background-color: #E0F2FE;
    color: #0369A1;
}

.badge-free {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.badge-popular {
    background-color: var(--color-accent-light);
    color: var(--color-accent);
}

.mega-item-desc {
    font-size: 12px;
    color: var(--color-text-light);
    line-height: 1.4;
}

/* Column 3: Promo / Highlight Card */
.mega-promo-card {
    background: linear-gradient(145deg, #F0F7FF 0%, #FFFFFF 100%);
    border: 1px solid #D6E8FA;
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.mega-promo-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.mega-promo-header svg {
    width: 16px;
    height: 16px;
}

.mega-promo-title {
    font-size: 16px;
    font-weight: 800;
    color: var(--color-text-heading);
    margin-bottom: 8px;
    line-height: 1.3;
}

.mega-promo-desc {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.5;
    margin-bottom: 16px;
}

.mega-promo-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    font-size: 13px;
    font-weight: 700;
    color: #FFFFFF;
    background-color: var(--color-accent);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.mega-promo-btn:hover {
    background-color: var(--color-accent-hover);
    color: #FFFFFF;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(216, 17, 107, 0.25);
}

.mega-promo-btn svg {
    width: 14px;
    height: 14px;
    stroke: currentColor;
    stroke-width: 2.5;
}

/* Right Side Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 700;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
    white-space: nowrap;
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-heading);
    border-color: transparent;
}

.btn-ghost:hover {
    background: var(--color-bg-muted);
    color: var(--color-primary);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-border);
}

.btn-outline:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.btn-primary {
    background: var(--color-primary);
    color: #FFFFFF;
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    color: #FFFFFF;
    box-shadow: 0 4px 12px rgba(13, 114, 214, 0.25);
}

.btn-accent {
    background: var(--color-accent);
    color: #FFFFFF;
}

.btn-accent:hover {
    background: var(--color-accent-hover);
    color: #FFFFFF;
    box-shadow: 0 4px 14px rgba(216, 17, 107, 0.3);
}

.btn-nav-action {
    padding: 8px 18px;
    font-size: 0.88rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
}

/* Mobile Hamburger Button */
.mobile-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--color-text-heading);
}

.mobile-toggle svg {
    width: 22px;
    height: 22px;
    stroke: currentColor;
    stroke-width: 2;
}

/* ========================================================
   MOBILE DRAWER NAVIGATION
   ======================================================== */
.mobile-drawer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1100;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.mobile-drawer {
    position: fixed;
    top: 0;
    right: -100%;
    width: 320px;
    max-width: 85vw;
    height: 100%;
    background: var(--color-bg-surface);
    z-index: 1150;
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
    transition: right 300ms cubic-bezier(0.16, 1, 0.3, 1);
    overflow-y: auto;
}

.mobile-drawer.is-open {
    right: 0;
}

.mobile-drawer-overlay.is-open {
    opacity: 1;
    visibility: visible;
}

.mobile-drawer-header {
    padding: 18px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--color-border);
}

.mobile-drawer-close {
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 6px;
    border-radius: var(--radius-sm);
}

.mobile-drawer-close:hover {
    background: var(--color-bg-muted);
    color: var(--color-text-heading);
}

.mobile-drawer-close svg {
    width: 22px;
    height: 22px;
    stroke: currentColor;
    stroke-width: 2;
}

.mobile-menu-list {
    list-style: none;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.mobile-menu-item {
    display: flex;
    flex-direction: column;
}

.mobile-menu-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text-heading);
    border-radius: var(--radius-sm);
    text-decoration: none;
    background: transparent;
    border: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
}

.mobile-menu-link:hover {
    background: var(--color-bg-muted);
    color: var(--color-primary);
}

.mobile-submenu {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: 6px 0 10px 14px;
    border-left: 2px solid var(--color-border);
    margin-left: 14px;
}

.mobile-menu-item.open > .mobile-submenu {
    display: flex;
}

.mobile-sub-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-muted);
    text-decoration: none;
    border-radius: var(--radius-sm);
}

.mobile-sub-link:hover {
    color: var(--color-primary);
    background: var(--color-primary-light);
}

.mobile-drawer-actions {
    margin-top: auto;
    padding: 20px;
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* ========================================================
   RESPONSIVE BREAKPOINTS
   ======================================================== */
@media (max-width: 1024px) {
    .nav-menu {
        display: none;
    }
    .mobile-toggle {
        display: flex;
    }
    .nav-actions .btn-ghost {
        display: none;
    }
}

@media (max-width: 768px) {
    .site-header {
        height: 60px;
    }
    .nav-container {
        padding: 0 16px;
        gap: 12px;
    }
    .nav-brand img {
        height: 34px;
        max-width: 135px;
    }
    .nav-actions {
        gap: 8px;
    }
    .nav-actions .btn {
        padding: 6px 12px !important;
        font-size: 0.8rem !important;
        height: 36px !important;
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        white-space: nowrap !important;
    }
    .mobile-toggle {
        width: 36px;
        height: 36px;
        min-width: 36px;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 12px;
        gap: 8px;
    }
    .nav-brand img {
        height: 30px;
        max-width: 120px;
    }
    .nav-actions .btn {
        padding: 6px 10px !important;
        font-size: 0.78rem !important;
        height: 34px !important;
    }
    .mobile-toggle {
        width: 34px;
        height: 34px;
        min-width: 34px;
    }
}