/*
 * VerdantCart AI — Site header + primary navigation
 * ==================================================
 *
 * Sticky top navigation loaded on every public marketing surface
 * (front page, about, pricing, demo, blog, static pages).
 *
 * Behavior:
 *   • Sticks to top of viewport with subtle shadow on scroll
 *   • Full nav visible on desktop (>1024px)
 *   • Collapses to hamburger menu on tablet + mobile (≤1024px)
 *   • Accessible: proper aria labels, focus states, skip link
 *
 * Custom properties (fallback if theme vars not loaded):
 *   --gc-nav-primary        Brand color (used for CTA + logo mark)
 *   --gc-nav-primary-hover  Slightly darker brand for hover states
 *   --gc-nav-text           Nav link text color
 *   --gc-nav-text-hover     Nav link hover color
 *   --gc-nav-bg             Header background
 *   --gc-nav-border         Border/divider color
 */

:root {
    --gc-nav-primary: #2e7d32;
    --gc-nav-primary-hover: #256029;
    --gc-nav-text: #1f2937;
    --gc-nav-text-hover: #2e7d32;
    --gc-nav-bg: rgba(255, 255, 255, 0.96);
    --gc-nav-border: #e5e7eb;
}

/* ------------------------------------------------------------------ *
 * Sticky header                                                       *
 * ------------------------------------------------------------------ */

.gc-site-header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--gc-nav-bg);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color 200ms ease, box-shadow 200ms ease;
}

.gc-site-header.is-scrolled {
    border-bottom-color: var(--gc-nav-border);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.gc-site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    width: min(1200px, calc(100% - 32px));
    margin: 0 auto;
    padding: 14px 0;
}

/* ------------------------------------------------------------------ *
 * Brand mark                                                          *
 * ------------------------------------------------------------------ */

.gc-site-header__brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--gc-nav-text);
    font-weight: 600;
    font-size: 17px;
    letter-spacing: -0.01em;
    flex-shrink: 0;
}

.gc-site-header__brand:hover,
.gc-site-header__brand:focus-visible {
    color: var(--gc-nav-primary);
}

.gc-site-header__logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 7px;
    background: var(--gc-nav-primary);
    color: #ffffff;
    font-weight: 800;
    font-size: 15px;
    letter-spacing: 0;
}

.gc-site-header__brand-text {
    display: inline-block;
}

/* ------------------------------------------------------------------ *
 * Primary navigation (desktop)                                        *
 * ------------------------------------------------------------------ */

.gc-site-header__nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

.gc-nav__list {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.gc-nav__item {
    margin: 0;
    padding: 0;
}

.gc-nav__link,
.gc-site-header__nav a {
    display: inline-block;
    padding: 6px 2px;
    text-decoration: none;
    color: var(--gc-nav-text);
    font-size: 14.5px;
    font-weight: 500;
    letter-spacing: -0.005em;
    line-height: 1.2;
    transition: color 150ms ease;
    border-bottom: 2px solid transparent;
}

.gc-nav__link:hover,
.gc-nav__link:focus-visible,
.gc-site-header__nav a:hover,
.gc-site-header__nav a:focus-visible {
    color: var(--gc-nav-text-hover);
    border-bottom-color: var(--gc-nav-primary);
    outline: none;
}

/* Active page indicator (WP core adds .current-menu-item to <li>). */
.gc-nav__list .current-menu-item > a,
.gc-nav__list .current_page_item > a {
    color: var(--gc-nav-text-hover);
    border-bottom-color: var(--gc-nav-primary);
}

/* ------------------------------------------------------------------ *
 * CTA button                                                          *
 * ------------------------------------------------------------------ */

.gc-site-header__actions {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}

.gc-site-header__cta {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 9px 18px;
    background: var(--gc-nav-primary);
    color: #ffffff;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: -0.005em;
    border-radius: 8px;
    transition: background-color 150ms ease, transform 100ms ease;
    white-space: nowrap;
}

.gc-site-header__cta:hover,
.gc-site-header__cta:focus-visible {
    background: var(--gc-nav-primary-hover);
    color: #ffffff;
    outline: none;
}

.gc-site-header__cta:active {
    transform: translateY(1px);
}

/* ------------------------------------------------------------------ *
 * Mobile toggle (hidden on desktop)                                   *
 * ------------------------------------------------------------------ */

.gc-site-header__mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
    width: 40px;
    height: 40px;
    padding: 0;
    background: transparent;
    border: 1px solid var(--gc-nav-border);
    border-radius: 8px;
    cursor: pointer;
}

.gc-site-header__mobile-toggle:hover,
.gc-site-header__mobile-toggle:focus-visible {
    border-color: var(--gc-nav-primary);
    outline: none;
}

.gc-site-header__mobile-bar {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--gc-nav-text);
    border-radius: 2px;
    transition: transform 200ms ease, opacity 150ms ease;
}

.gc-site-header__mobile-toggle[aria-expanded="true"] .gc-site-header__mobile-bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.gc-site-header__mobile-toggle[aria-expanded="true"] .gc-site-header__mobile-bar:nth-child(2) {
    opacity: 0;
}

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

/* ------------------------------------------------------------------ *
 * Mobile menu panel                                                   *
 * ------------------------------------------------------------------ */

.gc-site-header__mobile-menu {
    display: none;
    padding: 16px 20px 24px;
    background: #ffffff;
    border-top: 1px solid var(--gc-nav-border);
}

.gc-site-header.is-mobile-open .gc-site-header__mobile-menu {
    display: block;
}

.gc-nav__mobile-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
    list-style: none;
    margin: 0 0 20px;
    padding: 0;
}

.gc-nav__mobile-list li {
    margin: 0;
}

.gc-nav__mobile-list a {
    display: block;
    padding: 12px 8px;
    text-decoration: none;
    color: var(--gc-nav-text);
    font-size: 16px;
    font-weight: 500;
    border-radius: 8px;
    transition: background-color 120ms ease, color 120ms ease;
}

.gc-nav__mobile-list a:hover,
.gc-nav__mobile-list a:focus-visible {
    background: #f0f9f0;
    color: var(--gc-nav-primary);
    outline: none;
}

.gc-site-header__cta--mobile {
    display: flex;
    justify-content: center;
    padding: 14px 18px;
    font-size: 15px;
}

/* ------------------------------------------------------------------ *
 * Responsive breakpoints                                              *
 * ------------------------------------------------------------------ */

@media (max-width: 1024px) {
    .gc-site-header__nav,
    .gc-site-header__actions {
        display: none;
    }

    .gc-site-header__mobile-toggle {
        display: inline-flex;
    }

    .gc-site-header__inner {
        padding: 12px 0;
    }
}

@media (max-width: 480px) {
    .gc-site-header__inner {
        width: calc(100% - 24px);
    }

    .gc-site-header__brand-text {
        font-size: 16px;
    }

    .gc-site-header__logo {
        width: 28px;
        height: 28px;
        font-size: 14px;
    }
}

/* ------------------------------------------------------------------ *
 * Screen-reader-only utility (used by skip link)                      *
 * ------------------------------------------------------------------ */

.screen-reader-text {
    position: absolute !important;
    clip: rect(1px, 1px, 1px, 1px);
    height: 1px;
    width: 1px;
    overflow: hidden;
    word-wrap: normal;
}

.screen-reader-text:focus {
    background-color: #ffffff;
    border: 2px solid var(--gc-nav-primary);
    clip: auto !important;
    color: var(--gc-nav-primary);
    display: block;
    font-weight: 600;
    height: auto;
    left: 8px;
    line-height: normal;
    padding: 10px 16px;
    text-decoration: none;
    top: 8px;
    width: auto;
    z-index: 200;
}