/**
 * KZEN ENTERPRISE THEME - GLOBAL SECTIONS & STRUCTURAL CHROME
 * Hero · Features · Stats · Header · Footer · Drawer · Breadcrumbs · Cookie Banner
 *
 * @package Kzen_Enterprise_Theme
 */

/* ========================================================
 * 1. SECTION PRIMITIVES & MODIFIERS
 * ======================================================== */
.section {
    padding-block: var(--section-spacing-md);
    position: relative;
    width: 100%;
}

.section--sm {
    padding-block: var(--section-spacing-sm);
}

.section--lg {
    padding-block: var(--section-spacing-lg);
}

.section--light {
    background-color: var(--color-bg);
    color: var(--color-text);
}

.section--muted {
    background-color: var(--color-surface-muted);
    color: var(--color-text);
}

.section--dark {
    background-color: var(--color-primary-slate);
    color: var(--color-text-on-dark);
}

.section--dark h2,
.section--dark h3,
.section--dark h4 {
    color: var(--color-text-on-dark);
}

.section--dark p {
    color: var(--color-text-on-dark-muted);
}

.section--hero {
    padding-top: calc(var(--section-spacing-lg) + 32px);
    padding-bottom: var(--section-spacing-lg);
    background: radial-gradient(circle at top right, rgba(199, 163, 93, 0.08) 0%, transparent 60%),
                radial-gradient(circle at bottom left, rgba(26, 74, 68, 0.05) 0%, transparent 50%),
                var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

.section--cta {
    background: linear-gradient(135deg, var(--color-primary-slate) 0%, var(--color-primary-night) 100%);
    color: #FFFFFF;
    border-top: 1px solid var(--color-border-gold);
    border-bottom: 1px solid var(--color-border-gold);
}

/* ========================================================
 * 2. GLOBAL SITE HEADER
 * ======================================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(250, 250, 250, 0.94);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    transition: background-color var(--duration-base) var(--ease-standard),
                box-shadow var(--duration-base) var(--ease-standard),
                padding var(--duration-base) var(--ease-standard);
}

.site-header.is-scrolled {
    background: rgba(250, 250, 250, 0.98);
    box-shadow: var(--shadow-sm);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 72px;
    gap: var(--space-6);
}

.site-brand {
    display: flex;
    flex-direction: column;
    text-decoration: none;
}

.site-brand__logo {
    height: 38px;
    width: auto;
    object-fit: contain;
}

.site-brand__tagline {
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-top: 2px;
}

/* Desktop Navigation */
.site-nav {
    display: flex;
    align-items: center;
}

.site-nav__list {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-nav__item {
    position: relative;
}

.site-nav__link {
    font-family: var(--font-primary);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
    padding-block: var(--space-2);
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    transition: color var(--duration-fast);
}

.site-nav__link:hover,
.site-nav__link.is-active {
    color: var(--color-accent);
}

/* Desktop Submenu with 280ms grace buffer */
.site-nav__sub {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    min-width: 220px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    padding: var(--space-2);
    list-style: none;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: opacity 0.28s var(--ease-standard),
                visibility 0.28s var(--ease-standard),
                transform 0.28s var(--ease-standard);
    pointer-events: none;
}

.site-nav__item:hover .site-nav__sub,
.site-nav__item:focus-within .site-nav__sub {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

.site-nav__sub-link {
    display: block;
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: background var(--duration-fast), color var(--duration-fast);
}

.site-nav__sub-link:hover {
    background: var(--color-surface-muted);
    color: var(--color-primary);
}

.site-header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

/* Mobile Drawer Toggle */
.nav-toggle {
    display: none;
    background: transparent;
    border: none;
    padding: var(--space-2);
    cursor: pointer;
    color: var(--color-primary);
    min-width: var(--touch-min);
    min-height: var(--touch-min);
    align-items: center;
    justify-content: center;
}

/* ========================================================
 * 3. MOBILE NAVIGATION DRAWER
 * ======================================================== */
.drawer-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(10, 24, 22, 0.7);
    backdrop-filter: blur(4px);
    z-index: 1998;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--duration-base), visibility var(--duration-base);
}

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

.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(340px, 85vw);
    background: var(--color-bg);
    z-index: 1999;
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    border-left: 1px solid var(--color-border);
    transform: translateX(100%);
    transition: transform var(--duration-slow) var(--ease-standard);
}

.mobile-drawer.is-open {
    transform: translateX(0);
}

.mobile-drawer__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-8);
}

.mobile-drawer__close {
    background: transparent;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: var(--color-primary);
    min-width: var(--touch-min);
    min-height: var(--touch-min);
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-drawer__nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    list-style: none;
    margin: 0;
    padding: 0;
}

.mobile-drawer__link {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
    padding-block: var(--space-2);
}

.mobile-drawer__footer {
    margin-top: auto;
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

/* ========================================================
 * 4. GLOBAL SITE FOOTER
 * ======================================================== */
.site-footer {
    background: var(--color-primary-night);
    color: var(--color-text-on-dark);
    padding-top: var(--section-spacing-lg);
    padding-bottom: var(--space-8);
    border-top: 2px solid var(--color-accent);
}

.site-footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-12);
    margin-bottom: var(--section-spacing-md);
}

.site-footer__brand-logo {
    height: 38px;
    width: auto;
    margin-bottom: var(--space-2);
}

.site-footer__slogan {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-4);
}

.site-footer__desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-on-dark-muted);
    line-height: 1.65;
    max-width: 440px;
}

.site-footer__col-title {
    font-family: var(--font-display);
    font-size: 17px;
    font-weight: 700;
    color: #FFFFFF;
    margin-bottom: var(--space-4);
    position: relative;
    padding-bottom: var(--space-2);
}

.site-footer__col-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 24px;
    height: 2px;
    background: var(--color-accent);
}

.site-footer__links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.site-footer__link {
    font-size: var(--font-size-sm);
    color: var(--color-text-on-dark-muted);
    text-decoration: none;
    transition: color var(--duration-fast);
}

.site-footer__link:hover {
    color: var(--color-accent-light);
}

.site-footer__bottom {
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border-dark);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: var(--font-size-xs);
    color: var(--color-text-on-dark-muted);
}

/* ========================================================
 * 5. BREADCRUMBS
 * ======================================================== */
.breadcrumbs {
    padding-block: var(--space-4);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.breadcrumbs__list {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    list-style: none;
    margin: 0;
    padding: 0;
    flex-wrap: wrap;
}

.breadcrumbs__item {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.breadcrumbs__link {
    color: var(--color-text-muted);
    text-decoration: none;
}

.breadcrumbs__link:hover {
    color: var(--color-primary);
}

.breadcrumbs__separator {
    color: var(--color-border);
}

.breadcrumbs__current {
    color: var(--color-primary);
    font-weight: 600;
}

/* ========================================================
 * 6. COOKIE BANNER
 * ======================================================== */
.cookie-banner {
    position: fixed;
    bottom: 24px;
    left: 24px;
    right: 24px;
    max-width: 620px;
    background: var(--color-surface);
    border: 1px solid var(--color-border-gold);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--space-5) var(--space-6);
    z-index: 9998;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    transform: translateY(150%);
    transition: transform var(--duration-slow) var(--ease-standard);
}

.cookie-banner.is-visible {
    transform: translateY(0);
}

.cookie-banner__text {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.cookie-banner__actions {
    display: flex;
    gap: var(--space-2);
    flex-shrink: 0;
}

/* ========================================================
 * 7. BACKWARD COMPATIBILITY
 * ======================================================== */
.kzen-site-header { @extend .site-header; }
.kzen-header-inner { @extend .site-header__inner; }
.kzen-brand-wrap { @extend .site-brand; }
.kzen-brand-link { text-decoration: none; }
.kzen-brand-logo { @extend .site-brand__logo; }
.kzen-brand-tagline { @extend .site-brand__tagline; }
.kzen-nav-desktop { @extend .site-nav; }
.kzen-nav-list { @extend .site-nav__list; }
.kzen-nav-item { @extend .site-nav__item; }
.kzen-nav-link { @extend .site-nav__link; }
.kzen-header-actions { @extend .site-header__actions; }
.kzen-drawer-toggle { @extend .nav-toggle; }
.kzen-drawer-backdrop { @extend .drawer-backdrop; }
.kzen-mobile-drawer { @extend .mobile-drawer; }
.kzen-site-footer { @extend .site-footer; }
.kzen-footer-grid { @extend .site-footer__grid; }
.kzen-footer-brand-logo { @extend .site-footer__brand-logo; }
.kzen-footer-slogan { @extend .site-footer__slogan; }
.kzen-footer-desc { @extend .site-footer__desc; }
.kzen-footer-col-title { @extend .site-footer__col-title; }
.kzen-footer-links { @extend .site-footer__links; }
.kzen-footer-bottom { @extend .site-footer__bottom; }
.kzen-hero-editorial { @extend .section--hero; }
.kzen-hero-eyebrow { @extend .section-eyebrow; }
.kzen-hero-title { font-family: var(--font-display); font-size: var(--heading-display); color: var(--color-primary); line-height: 1.1; margin-bottom: var(--space-4); }
.kzen-hero-subtitle { font-size: var(--font-size-lg); color: var(--color-text-secondary); max-width: 720px; margin-bottom: var(--space-8); }
.kzen-hero-actions { display: flex; align-items: center; gap: var(--space-4); flex-wrap: wrap; margin-bottom: var(--space-12); }
.kzen-stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4); }
.kzen-catalog-section { @extend .section; }
.kzen-catalog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: var(--space-6); }
.kzen-section-header { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: var(--space-8); }
.kzen-section-subtitle { font-size: var(--font-size-sm); color: var(--color-text-muted); }
.kzen-infra-section { @extend .section--muted; }
.kzen-infra-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--space-6); }
.kzen-infra-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-6); }
.kzen-infra-card-title { font-family: var(--font-display); font-size: 18px; font-weight: 700; color: var(--color-primary); display: flex; align-items: center; gap: var(--space-2); margin-bottom: var(--space-2); }
.kzen-infra-card-desc { font-size: var(--font-size-sm); color: var(--color-text-secondary); line-height: 1.5; }