/* ========================================
   Mega Menu Styles
   ======================================== */

/* Base Navigation */
.mega-nav {
    display: flex;
    align-items: center;
}

.mega-nav__list {
    display: flex;
    align-items: center;
    gap: var(--sd-spacing-xs);
    list-style: none;
    margin: 0;
    padding: 0;
}

.mega-nav__item {
    position: relative;
}

/* Navigation Links & Buttons */
.mega-nav__link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 8px 16px;
    font-size: var(--sd-text-sm);
    font-weight: 500;
    color: var(--sd-gray-700);
    text-decoration: none;
    background: transparent;
    border: none;
    border-radius: var(--sd-radius-md);
    cursor: pointer;
    transition: color var(--sd-transition-fast), background-color var(--sd-transition-fast);
}

.mega-nav__link:hover,
.mega-nav__item--has-dropdown.is-open > .mega-nav__link {
    color: var(--sd-primary);
    background-color: var(--sd-gray-50);
}

.mega-nav__chevron {
    transition: transform var(--sd-transition-fast);
}

.mega-nav__item--has-dropdown.is-open > .mega-nav__link .mega-nav__chevron {
    transform: rotate(180deg);
}

/* Dropdown Container */
.mega-nav__dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding-top: 12px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    /* No transition when closing - instant hide */
    transition: none;
    z-index: 1000;
}

.mega-nav__item--has-dropdown.is-open > .mega-nav__dropdown {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    /* Smooth transition when opening */
    transition: opacity var(--sd-transition-base), visibility var(--sd-transition-base);
}

.mega-nav__dropdown-inner {
    display: flex;
    gap: 0;
    background: var(--sd-white);
    border: 1px solid var(--sd-gray-200);
    border-radius: var(--sd-radius-xl);
    box-shadow: var(--sd-shadow-xl);
    overflow: hidden;
}

/* Dropdown Columns */
.mega-nav__column {
    padding: 24px;
    min-width: 240px;
}

.mega-nav__column:not(:last-child) {
    border-right: 1px solid var(--sd-gray-100);
}

.mega-nav__column--highlight {
    background: var(--sd-gray-50);
}

.mega-nav__column-header {
    font-size: var(--sd-text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--sd-gray-500);
    margin-bottom: 16px;
    padding: 0 12px;
}

/* Dropdown Links */
.mega-nav__dropdown-link {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 12px;
    text-decoration: none;
    border-radius: var(--sd-radius-md);
    transition: background-color var(--sd-transition-fast);
}

.mega-nav__dropdown-link:hover {
    background-color: var(--sd-gray-100);
}

.mega-nav__column--highlight .mega-nav__dropdown-link:hover {
    background-color: var(--sd-gray-200);
}

.mega-nav__dropdown-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    background: var(--sd-gray-100);
    border-radius: var(--sd-radius-md);
    color: var(--sd-gray-600);
}

.mega-nav__dropdown-icon--primary {
    background: linear-gradient(135deg, var(--sd-primary) 0%, var(--sd-primary-dark) 100%);
    color: var(--sd-white);
}

.mega-nav__dropdown-icon svg {
    width: 20px;
    height: 20px;
}

.mega-nav__dropdown-content {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.mega-nav__dropdown-title {
    font-size: var(--sd-text-sm);
    font-weight: 500;
    color: var(--sd-gray-900);
    line-height: 1.4;
}

.mega-nav__dropdown-desc {
    font-size: var(--sd-text-xs);
    color: var(--sd-gray-500);
    line-height: 1.4;
}

/* Compact Links (for Compare section) */
.mega-nav__dropdown-link--compact {
    padding: 8px 12px;
}

.mega-nav__dropdown-link--compact .mega-nav__dropdown-title {
    font-size: var(--sd-text-sm);
    font-weight: 400;
    color: var(--sd-gray-600);
}

.mega-nav__dropdown-link--compact:hover .mega-nav__dropdown-title {
    color: var(--sd-primary);
}

/* View All Link */
.mega-nav__dropdown-link--all {
    margin-top: 8px;
    padding-top: 12px;
    border-top: 1px solid var(--sd-gray-200);
    justify-content: space-between;
}

.mega-nav__dropdown-link--all span {
    font-size: var(--sd-text-sm);
    font-weight: 500;
    color: var(--sd-primary);
}

.mega-nav__dropdown-link--all svg {
    color: var(--sd-primary);
    transition: transform var(--sd-transition-fast);
}

.mega-nav__dropdown-link--all:hover svg {
    transform: translateX(4px);
}

/* Specific Dropdown Sizes */
.mega-nav__dropdown--features {
    /* Use fixed positioning for wide dropdown */
    position: fixed;
    left: 50%;
    transform: translateX(-50%);
    top: 72px; /* Header height */
    width: calc(100vw - 48px);
    max-width: 1000px;
}

.mega-nav__dropdown--features .mega-nav__dropdown-inner {
    width: 100%;
}

.mega-nav__dropdown--solutions .mega-nav__dropdown-inner {
    width: max-content;
    max-width: 560px;
}

.mega-nav__dropdown--resources .mega-nav__dropdown-inner {
    width: max-content;
    max-width: 780px;
}

/* Mobile Toggle */
.mega-nav__mobile-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--sd-radius-md);
    color: var(--sd-gray-700);
    cursor: pointer;
    transition: background-color var(--sd-transition-fast);
}

.mega-nav__mobile-toggle:hover {
    background-color: var(--sd-gray-100);
}

.mega-nav__mobile-icon--close {
    display: none;
}

.mega-nav__mobile-toggle[aria-expanded="true"] .mega-nav__mobile-icon--open {
    display: none;
}

.mega-nav__mobile-toggle[aria-expanded="true"] .mega-nav__mobile-icon--close {
    display: block;
}

/* Mobile CTA Buttons - Hidden on desktop */
.mega-nav__item--mobile-cta {
    display: none;
}

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

@media (max-width: 1024px) {
    .mega-nav__mobile-toggle {
        display: flex;
    }

    .mega-nav__list {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        bottom: 0;
        height: calc(100vh - 72px);
        height: calc(100dvh - 72px); /* Dynamic viewport height for mobile browsers */
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 16px;
        background: var(--sd-white);
        overflow-y: auto;
        transform: translateX(-100%);
        transition: transform var(--sd-transition-slow);
        z-index: 999;
    }

    .mega-nav.is-open .mega-nav__list {
        transform: translateX(0);
    }

    /* Reset Features dropdown fixed positioning for mobile */
    .mega-nav__dropdown--features {
        position: static;
        left: auto;
        top: auto;
        transform: none;
        width: 100%;
        max-width: none;
    }

    .mega-nav__item {
        border-bottom: 1px solid var(--sd-gray-100);
    }

    .mega-nav__link {
        width: 100%;
        justify-content: space-between;
        padding: 16px;
        font-size: var(--sd-text-base);
    }

    .mega-nav__dropdown {
        position: static;
        transform: none;
        padding-top: 0;
        max-height: 0;
        opacity: 1;
        visibility: visible;
        overflow: hidden;
        transition: max-height var(--sd-transition-slow);
    }

    .mega-nav__item--has-dropdown.is-open > .mega-nav__dropdown {
        max-height: 2000px;
    }

    .mega-nav__dropdown-inner {
        flex-direction: column;
        border: none;
        border-radius: 0;
        box-shadow: none;
        background: var(--sd-gray-50);
    }

    .mega-nav__column {
        padding: 16px;
        min-width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--sd-gray-200);
    }

    .mega-nav__column:last-child {
        border-bottom: none;
    }

    .mega-nav__column--highlight {
        background: var(--sd-gray-100);
    }

    .mega-nav__dropdown--features .mega-nav__dropdown-inner,
    .mega-nav__dropdown--solutions .mega-nav__dropdown-inner,
    .mega-nav__dropdown--resources .mega-nav__dropdown-inner {
        width: 100%;
        max-width: none;
    }

    /* Mobile CTA Buttons - positioned below menu items */
    .mega-nav__item--mobile-cta {
        display: block;
        border-bottom: none;
    }

    .mega-nav__item--mobile-cta:first-of-type {
        margin-top: 16px;
        padding-top: 16px;
        border-top: 1px solid var(--sd-gray-200);
    }

    .mega-nav__item--mobile-cta:last-of-type {
        margin-top: 8px;
    }

    .mega-nav__link--mobile-login {
        color: var(--sd-gray-700);
        justify-content: center;
        border: 1px solid var(--sd-gray-300);
        border-radius: var(--sd-radius-md);
        background: var(--sd-white);
    }

    .mega-nav__link--mobile-login:hover {
        color: var(--sd-primary);
        border-color: var(--sd-primary);
        background: var(--sd-gray-50);
    }

    .mega-nav__link--mobile-signup {
        background: var(--sd-primary);
        color: var(--sd-white);
        border-radius: var(--sd-radius-md);
        justify-content: center;
    }

    .mega-nav__link--mobile-signup:hover {
        background: var(--sd-primary-dark);
        color: var(--sd-white);
    }
}

/* Backdrop for mobile */
.mega-nav__backdrop {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--sd-transition-base), visibility var(--sd-transition-base);
    z-index: 998;
}

.mega-nav.is-open .mega-nav__backdrop {
    opacity: 1;
    visibility: visible;
}

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

@media (min-width: 1025px) {
    body.mega-nav-open {
        overflow: auto;
    }
}

/* ========================================
   Animation Enhancements
   ======================================== */

/* Stagger animation for dropdown items */
.mega-nav__dropdown-link {
    opacity: 0;
    transform: translateY(-8px);
    transition:
        background-color var(--sd-transition-fast),
        opacity var(--sd-transition-base),
        transform var(--sd-transition-base);
}

.mega-nav__item--has-dropdown.is-open .mega-nav__dropdown-link {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger delays */
.mega-nav__column:nth-child(1) .mega-nav__dropdown-link { transition-delay: 0ms; }
.mega-nav__column:nth-child(2) .mega-nav__dropdown-link { transition-delay: 30ms; }
.mega-nav__column:nth-child(3) .mega-nav__dropdown-link { transition-delay: 60ms; }
.mega-nav__column:nth-child(4) .mega-nav__dropdown-link { transition-delay: 90ms; }

.mega-nav__dropdown-link:nth-child(2) { transition-delay: calc(var(--base-delay, 0ms) + 20ms); }
.mega-nav__dropdown-link:nth-child(3) { transition-delay: calc(var(--base-delay, 0ms) + 40ms); }
.mega-nav__dropdown-link:nth-child(4) { transition-delay: calc(var(--base-delay, 0ms) + 60ms); }
.mega-nav__dropdown-link:nth-child(5) { transition-delay: calc(var(--base-delay, 0ms) + 80ms); }

/* Disable animation stagger on mobile for performance */
@media (max-width: 1024px) {
    .mega-nav__dropdown-link {
        opacity: 1;
        transform: none;
        transition-delay: 0ms;
    }
}