/* ============================================
   NAVIGATION — ui-kit polish utilities
   ============================================
   1. .uk-nav-progress  — top-of-viewport scroll bar
   2. .uk-mobile-menu-backdrop — dim layer behind a drawer
   3. .uk-mobile-menu-link-card — icon + label + chevron link
   4. .uk-mobile-menu-feature  — optional promo card in a drawer
   Each is opt-in and independent of the legacy .nav /
   .docs-sidebar / .mobile-menu chrome in style.css.
   ============================================ */

/* ============================================
   1. Scroll progress bar — fills as the user scrolls
   the page. Width is driven by a --scroll-progress
   CSS variable (0 → 1) written from public/js/uk-nav-progress.js
   on the document root. Pure CSS otherwise.
   ============================================ */
.uk-nav-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    z-index: 1100;
    pointer-events: none;
    background: transparent;
}

.uk-nav-progress::after {
    content: '';
    display: block;
    height: 100%;
    width: calc(var(--scroll-progress, 0) * 100%);
    background: var(--gradient-primary);
    border-radius: 0 var(--radius-full) var(--radius-full) 0;
    box-shadow: 0 0 12px rgba(var(--color-primary-rgb), 0.45);
    transition: width 0.1s linear;
}

@media (prefers-reduced-motion: reduce) {
    .uk-nav-progress::after { transition: none; }
}

/* ============================================
   2. Mobile menu backdrop — dim layer behind any drawer.
   Compose with the consumer's open/close JS by toggling
   .active on the backdrop alongside the drawer.
   ============================================ */
.uk-mobile-menu-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 998;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.uk-mobile-menu-backdrop.active {
    opacity: 1;
    pointer-events: auto;
}

@media (prefers-reduced-motion: reduce) {
    .uk-mobile-menu-backdrop { transition: none; }
}

/* ============================================
   3. .uk-mobile-menu-link-card — rich link variant
   icon-box + label + chevron-right. Each row is a
   tappable card with hover lift, active primary tint,
   and a left-accent bar on .active. The chevron eases
   right on hover, signalling "drill down".
   ============================================ */
.uk-mobile-menu-link-card {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: 0.65rem 0.85rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid transparent;
    border-radius: var(--radius-lg);
    color: var(--color-text);
    text-decoration: none;
    font-size: var(--font-base);
    font-weight: 500;
    line-height: var(--line-normal);
    cursor: pointer;
    overflow: hidden;
    transition: background-color 0.2s cubic-bezier(0.16, 1, 0.3, 1),
                border-color 0.2s cubic-bezier(0.16, 1, 0.3, 1),
                color 0.2s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.1s cubic-bezier(0.16, 1, 0.3, 1);
}

.uk-mobile-menu-link-card-icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: rgba(var(--color-primary-rgb), 0.1);
    color: var(--color-primary-light);
    transition: background 0.2s cubic-bezier(0.16, 1, 0.3, 1),
                color 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.uk-mobile-menu-link-card-icon svg {
    width: 18px;
    height: 18px;
    stroke-width: 2;
}

.uk-mobile-menu-link-card-label {
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.uk-mobile-menu-link-card-arrow {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    color: var(--color-text-muted);
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1),
                color 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Hover — light primary tint + chevron leans toward content,
   icon bg deepens. */
.uk-mobile-menu-link-card:hover {
    background: rgba(var(--color-primary-rgb), 0.06);
    border-color: rgba(var(--color-primary-rgb), 0.2);
    color: var(--color-primary-light);
}

.uk-mobile-menu-link-card:hover .uk-mobile-menu-link-card-icon {
    background: rgba(var(--color-primary-rgb), 0.18);
    color: var(--color-primary-light);
}

.uk-mobile-menu-link-card:hover .uk-mobile-menu-link-card-arrow {
    transform: translateX(3px);
    color: var(--color-primary-light);
}

/* Press — tactile "physical" scale-down */
.uk-mobile-menu-link-card:active {
    transform: scale(0.98);
    transition-duration: 0.06s;
}

/* Active page — primary-tinted card + 2 px left accent bar */
.uk-mobile-menu-link-card.active {
    background: rgba(var(--color-primary-rgb), 0.12);
    border-color: rgba(var(--color-primary-rgb), 0.35);
    color: var(--color-primary-light);
    font-weight: 600;
}

.uk-mobile-menu-link-card.active::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    width: 2px;
    height: 60%;
    background: var(--color-primary);
    border-radius: 0 var(--radius-full) var(--radius-full) 0;
    transform: translateY(-50%);
}

.uk-mobile-menu-link-card.active .uk-mobile-menu-link-card-icon {
    background: rgba(var(--color-primary-rgb), 0.22);
    color: var(--color-primary-light);
}

.uk-mobile-menu-link-card.active .uk-mobile-menu-link-card-arrow {
    color: var(--color-primary);
}

.uk-mobile-menu-link-card:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ============================================
   4. .uk-mobile-menu-feature — optional promo card slot
   Primary-gradient border + soft glow, mono-typed label
   or simple text, for marketing flourish ("14 days free",
   "New: SSL alerts in v1.46", etc.). Composable with
   everything.
   ============================================ */
.uk-mobile-menu-feature {
    position: relative;
    margin-top: var(--space-xl);
    padding: var(--space-md);
    background: linear-gradient(180deg,
        rgba(var(--color-primary-rgb), 0.1) 0%,
        rgba(var(--color-primary-rgb), 0.04) 100%);
    border: 1px solid rgba(var(--color-primary-rgb), 0.25);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 24px rgba(var(--color-primary-rgb), 0.1);
}

.uk-mobile-menu-feature-title {
    font-size: var(--font-sm);
    font-weight: 600;
    color: var(--color-primary-light);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin: 0 0 4px;
}

.uk-mobile-menu-feature-text {
    font-size: var(--font-md);
    color: var(--color-text);
    line-height: var(--line-snug);
    margin: 0;
}