:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --text: #1f2937;
    --text-light: #6b7280;
    --bg: #ffffff;
    --bg-light: #f9fafb;
    --border: #e5e7eb;
    --shadow: 0 10px 40px rgba(0,0,0,0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    color: var(--text);
    line-height: 1.6;
}

.mega-menu-header {
    background: var(--bg);
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.header-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.site-logo a {
    text-decoration: none;
    color: var(--text);
    font-size: 26px;
    font-weight: 700;
    display: flex;
    align-items: center;
}

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

/* ===========================
   MOBILE TOGGLE
   =========================== */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.hamburger span {
    display: block;
    width: 30px;
    height: 3px;
    background: var(--text);
    transition: var(--transition);
    border-radius: 2px;
}

.mobile-menu-toggle.active .hamburger span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 8px);
}

.mobile-menu-toggle.active .hamburger span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active .hamburger span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -8px);
}

/* ===========================
   MEGA MENU DESKTOP
   =========================== */
.mega-navigation {
    display: block;
}

.mega-menu {
    display: flex;
    list-style: none;
    gap: 8px;
    margin: 0;
    padding: 0;
}

.mega-menu > li {
    position: relative;
}

.mega-menu > li > a {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
    border-radius: 8px;
    position: relative;
}

.mega-menu > li > a::before {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 20px;
    right: 20px;
    height: 2px;
    background: var(--primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.mega-menu > li > a:hover,
.mega-menu > li.current-menu-item > a {
    color: var(--primary);
    background: var(--bg-light);
}

.mega-menu > li > a:hover::before,
.mega-menu > li.current-menu-item > a::before {
    transform: scaleX(1);
}

/* Dropdown arrow */
.mega-menu .menu-item-has-children > a::after {
    content: '';
    display: inline-block;
    width: 0;
    height: 0;
    margin-left: 8px;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid currentColor;
    transition: var(--transition);
}

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

/* ===========================
   MEGA DROPDOWN
   =========================== */
.mega-menu .sub-menu {
    position: absolute;
    top: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%);
    min-width: 240px;
    background: var(--bg);
    box-shadow: var(--shadow);
    border-radius: 12px;
    padding: 16px;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateX(-50%) translateY(-10px);
    transition: var(--transition);
    z-index: 100;
}

/* Large mega menu for items with many children */
.mega-menu > li.mega-item > .sub-menu {
    min-width: 600px;
    max-width: 900px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.mega-menu li:hover > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* Submenu items */
.mega-menu .sub-menu li {
    position: relative;
    margin-bottom: 4px;
}

.mega-menu .sub-menu a {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    color: var(--text);
    text-decoration: none;
    transition: var(--transition);
    border-radius: 6px;
    font-size: 14px;
}

.mega-menu .sub-menu a:hover {
    background: var(--bg-light);
    color: var(--primary);
    padding-left: 20px;
}

/* Featured menu item */
.mega-menu .sub-menu li.featured {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 8px;
    padding: 16px;
    margin-top: 8px;
}

.mega-menu .sub-menu li.featured a {
    color: white;
    font-weight: 600;
}

.mega-menu .sub-menu li.featured a:hover {
    background: rgba(255,255,255,0.1);
}

/* Child submenu (Level 3) */
.mega-menu .sub-menu .sub-menu {
    top: 0;
    left: calc(100% + 10px);
    transform: none;
}

.mega-menu .sub-menu li:hover > .sub-menu {
    transform: translateX(0);
}

.mega-menu .sub-menu .menu-item-has-children > a::after {
    content: '';
    margin-left: auto;
    border-left: 5px solid currentColor;
    border-top: 4px solid transparent;
    border-bottom: 4px solid transparent;
    border-right: none;
}

/* ===========================
   MEGA MENU COLUMNS
   =========================== */
.mega-menu .sub-menu .menu-column {
    display: flex;
    flex-direction: column;
}

.mega-menu .sub-menu .column-title {
    font-weight: 700;
    font-size: 13px;
    text-transform: uppercase;
    color: var(--text-light);
    margin-bottom: 12px;
    padding: 0 16px;
    letter-spacing: 0.5px;
}

/* ===========================
   RESPONSIVE - MOBILE
   =========================== */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }

    .mega-navigation {
        position: fixed;
        top: 0;
        right: -100%;
        width: 320px;
        max-width: 90vw;
        height: 100vh;
        background: var(--bg);
        box-shadow: -4px 0 20px rgba(0,0,0,0.1);
        transition: right 0.3s ease;
        overflow-y: auto;
        padding: 100px 0 40px;
    }

    .mega-navigation.active {
        right: 0;
    }

    .mega-menu {
        flex-direction: column;
        gap: 0;
    }

    .mega-menu > li {
        border-bottom: 1px solid var(--border);
    }

    .mega-menu > li > a {
        padding: 16px 24px;
        border-radius: 0;
    }

    .mega-menu > li > a::before {
        display: none;
    }

    /* Mobile submenu */
    .mega-menu .sub-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border-radius: 0;
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        background: var(--bg-light);
        min-width: auto;
        grid-template-columns: 1fr;
    }

    .mega-menu .menu-item-has-children.active > .sub-menu {
        max-height: 800px;
        padding: 8px 0;
    }

    .mega-menu .sub-menu a {
        padding: 12px 24px 12px 48px;
    }

    .mega-menu .sub-menu .sub-menu a {
        padding-left: 72px;
    }

    .mega-menu .sub-menu li.featured {
        margin: 8px 16px;
    }

    /* Mobile arrow */
    .mega-menu .menu-item-has-children > a::after {
        position: absolute;
        right: 24px;
    }

    .mega-menu .menu-item-has-children.active > a::after {
        transform: rotate(180deg);
    }

    /* Overlay */
    .mega-navigation::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(0,0,0,0.5);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        z-index: -1;
    }

    .mega-navigation.active::before {
        opacity: 1;
        visibility: visible;
    }
}

/* ===========================
   TABLET
   =========================== */
@media (max-width: 1024px) and (min-width: 769px) {
    .mega-menu {
        gap: 4px;
    }
    
    .mega-menu > li > a {
        padding: 10px 16px;
        font-size: 14px;
    }
    
    .mega-menu > li.mega-item > .sub-menu {
        min-width: 500px;
    }
}

/* ===========================
   HOVER EFFECTS & ANIMATIONS
   =========================== */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.mega-menu li:hover > .sub-menu {
    animation: slideDown 0.3s ease forwards;
}

/* Stagger animation for menu items */
.mega-menu .sub-menu li {
    animation: fadeInUp 0.3s ease forwards;
    opacity: 0;
}

.mega-menu li:hover > .sub-menu li:nth-child(1) { animation-delay: 0.05s; }
.mega-menu li:hover > .sub-menu li:nth-child(2) { animation-delay: 0.1s; }
.mega-menu li:hover > .sub-menu li:nth-child(3) { animation-delay: 0.15s; }
.mega-menu li:hover > .sub-menu li:nth-child(4) { animation-delay: 0.2s; }
.mega-menu li:hover > .sub-menu li:nth-child(5) { animation-delay: 0.25s; }

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}