/*
Theme Name: Zenith
Theme URI: https://zenithvaccums.com
Author: Zenith
Author URI: https://zenithvaccums.com
Description: Premium e-commerce theme for Zenith robot vacuum store. Built for WooCommerce with a minimalist, high-end aesthetic. USA market.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: zenith
Tags: e-commerce, woocommerce, custom-menu, custom-logo, featured-images

Zenith - Your New BFF. Premium robot vacuums for the modern American home.
*/

/* ===== BASE RESET & VARIABLES ===== */
:root {
    --z-primary: #0a1422;
    --z-on-primary: #ffffff;
    --z-primary-container: #1f2937;
    --z-on-primary-container: #8690a1;
    --z-secondary: #006c49;
    --z-on-secondary: #ffffff;
    --z-surface: #f8f9fa;
    --z-surface-low: #f3f4f5;
    --z-surface-container: #edeeef;
    --z-surface-high: #e7e8e9;
    --z-surface-highest: #e1e3e4;
    --z-on-surface: #191c1d;
    --z-on-surface-variant: #44474c;
    --z-outline: #75777c;
    --z-outline-variant: #c5c6cc;
    --z-tertiary-container: #00265a;
    --z-on-tertiary-container: #4a8cff;
    --z-error: #ba1a1a;
    --z-secondary-fixed: #6ffbbe;
    --z-primary-fixed: #d9e3f6;
    --z-shadow-low: 0px 2px 4px rgba(31, 41, 55, 0.04);
    --z-shadow-hover: 0px 10px 20px rgba(31, 41, 55, 0.08);
    --z-radius: 0.5rem;
    --z-radius-sm: 0.25rem;
    --z-radius-lg: 1rem;
    --z-max-width: 1280px;
    --z-gutter: 24px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--z-surface);
    color: var(--z-on-surface);
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }

::selection {
    background: var(--z-primary-fixed);
    color: var(--z-primary);
}

/* ===== TYPOGRAPHY ===== */
.z-display { font-size: 48px; line-height: 56px; font-weight: 600; letter-spacing: -0.02em; }
.z-headline-md { font-size: 30px; line-height: 38px; font-weight: 600; letter-spacing: -0.01em; }
.z-headline-sm { font-size: 24px; line-height: 32px; font-weight: 500; }
.z-body-lg { font-size: 18px; line-height: 28px; }
.z-body-md { font-size: 16px; line-height: 24px; }
.z-body-sm { font-size: 14px; line-height: 20px; }
.z-label-md { font-size: 14px; line-height: 16px; font-weight: 600; letter-spacing: 0.05em; }
.z-label-sm { font-size: 12px; line-height: 16px; font-weight: 500; }

@media (max-width: 768px) {
    .z-display { font-size: 32px; line-height: 40px; letter-spacing: -0.01em; }
}

/* ===== LAYOUT ===== */
.z-container { max-width: var(--z-max-width); margin: 0 auto; padding: 0 var(--z-gutter); }
.z-section { padding: 80px 0; }
.z-section-sm { padding: 48px 0; }

/* ===== COMPONENTS ===== */
.z-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 48px; font-size: 14px; font-weight: 600; letter-spacing: 0.05em;
    border-radius: var(--z-radius-sm); cursor: pointer; transition: all 0.3s ease;
    border: none; text-transform: uppercase;
}
.z-btn:active { transform: scale(0.98); }
.z-btn-primary { background: var(--z-primary); color: var(--z-on-primary); }
.z-btn-primary:hover { opacity: 0.9; transform: translateY(-2px); }
.z-btn-outline { background: transparent; border: 1px solid var(--z-primary); color: var(--z-primary); }
.z-btn-outline:hover { background: var(--z-surface-high); }
.z-btn-white { background: white; color: var(--z-primary); }
.z-btn-white:hover { background: var(--z-surface-high); }

.z-card {
    box-shadow: var(--z-shadow-low);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
    border-radius: var(--z-radius);
    overflow: hidden;
}
.z-card:hover {
    box-shadow: var(--z-shadow-hover);
}

.z-badge {
    display: inline-block; padding: 2px 8px;
    font-size: 12px; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase;
}

.z-input {
    width: 100%; padding: 12px 16px;
    border: 1px solid var(--z-outline-variant); border-radius: var(--z-radius-sm);
    font-size: 16px; background: white; color: var(--z-on-surface);
    transition: border-color 0.2s;
}
.z-input:focus {
    outline: none; border-color: var(--z-primary);
    box-shadow: 0 0 0 2px rgba(10,20,34,0.1);
}

/* ===== HEADER ===== */
.z-header {
    position: fixed; top: 0; width: 100%; z-index: 50;
    background: white; border-bottom: 1px solid var(--z-outline-variant);
    box-shadow: 0 1px 3px rgba(0,0,0,0.04); height: 80px;
    display: flex; align-items: center;
    transition: all 0.3s ease;
}
.z-header.scrolled { backdrop-filter: blur(12px); background: rgba(255,255,255,0.95); box-shadow: 0 4px 12px rgba(0,0,0,0.08); }
.z-header-inner { display: flex; justify-content: space-between; align-items: center; width: 100%; }
.z-logo { display: flex; align-items: center; gap: 8px; }
.z-logo img { height: 40px; width: auto; }
.z-logo-text { font-size: 24px; font-weight: 700; letter-spacing: 0.1em; color: var(--z-primary); }
.z-nav { display: flex; align-items: center; gap: 48px; }
.z-nav a { font-size: 16px; color: var(--z-on-surface-variant); transition: color 0.2s; }
.z-nav a:hover, .z-nav a.active { color: var(--z-primary); }
.z-nav a.active { font-weight: 700; border-bottom: 2px solid var(--z-primary); padding-bottom: 4px; }
.z-header-actions { display: flex; align-items: center; gap: 24px; }
.z-search-bar {
    display: flex; align-items: center; background: var(--z-surface-low);
    padding: 8px 16px; border-radius: var(--z-radius); border: 1px solid var(--z-outline-variant);
}
.z-search-bar input { background: transparent; border: none; outline: none; width: 180px; font-size: 14px; }
.z-cart-icon { position: relative; color: var(--z-primary); }
.z-cart-count {
    position: absolute; top: -4px; right: -4px;
    background: var(--z-secondary); color: white;
    font-size: 10px; width: 16px; height: 16px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center; font-weight: 700;
}
.z-mobile-toggle { display: none; background: none; border: none; color: var(--z-primary); cursor: pointer; }
.z-mobile-menu {
    display: none; position: absolute; top: 80px; left: 0; width: 100%;
    background: white; border-bottom: 1px solid var(--z-outline-variant);
    box-shadow: 0 8px 16px rgba(0,0,0,0.08); padding: 24px;
}
.z-mobile-menu.open { display: flex; flex-direction: column; gap: 16px; }
.z-mobile-menu a { font-size: 16px; color: var(--z-on-surface-variant); padding: 8px 0; }

@media (max-width: 768px) {
    .z-nav, .z-search-bar { display: none; }
    .z-mobile-toggle { display: block; }
}

/* ===== FOOTER ===== */
.z-footer { background: var(--z-surface-low); border-top: 1px solid var(--z-outline-variant); padding: 80px 0 0; }
.z-footer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.z-footer h4 { font-size: 14px; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; color: var(--z-primary); margin-bottom: 12px; }
.z-footer ul { list-style: none; }
.z-footer li { margin-bottom: 4px; }
.z-footer a { font-size: 14px; color: var(--z-on-surface-variant); transition: color 0.2s; }
.z-footer a:hover { color: var(--z-primary); }
.z-footer-bottom {
    margin-top: 80px; padding: 24px 0; border-top: 1px solid var(--z-outline-variant);
    display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px;
}
@media (max-width: 768px) {
    .z-footer-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ===== HERO ===== */
.z-hero {
    min-height: 870px; display: flex; align-items: center; background: white; position: relative;
}
.z-hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.z-hero-tagline { font-size: 14px; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; color: var(--z-secondary); }
.z-hero-image { position: relative; display: flex; justify-content: center; }
.z-hero-image img { width: 100%; object-fit: contain; filter: drop-shadow(0 20px 40px rgba(0,0,0,0.15)); }
.z-hero-glow {
    position: absolute; width: 120%; height: 120%; background: var(--z-surface-container);
    border-radius: 50%; opacity: 0.3; filter: blur(60px); z-index: -1;
}
@media (max-width: 768px) {
    .z-hero { min-height: auto; padding: 80px 0 40px; }
    .z-hero-grid { grid-template-columns: 1fr; }
}

/* ===== PRODUCT GRID ===== */
.z-product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.z-product-card { cursor: pointer; }
.z-product-card .z-product-image {
    aspect-ratio: 4/5; background: var(--z-surface-low); border-radius: var(--z-radius);
    overflow: hidden; position: relative; display: flex; align-items: center; justify-content: center;
    padding: 24px; box-shadow: var(--z-shadow-low); transition: box-shadow 0.3s;
}
.z-product-card:hover .z-product-image { box-shadow: var(--z-shadow-hover); }
.z-product-card .z-product-image img { width: 100%; height: 100%; object-fit: contain; transition: transform 0.5s; }
.z-product-card:hover .z-product-image img { transform: scale(1.05); }
.z-product-card .z-product-info { margin-top: 16px; }
.z-product-card h3 { font-size: 18px; font-weight: 600; color: var(--z-primary); }
.z-product-card:hover h3 { text-decoration: underline; }
.z-product-card .z-product-tagline { font-size: 14px; color: var(--z-on-surface-variant); margin-top: 4px; }
.z-product-card .z-product-price { font-size: 24px; font-weight: 700; color: var(--z-primary); }
.z-product-card .z-product-old-price { font-size: 14px; color: var(--z-on-surface-variant); text-decoration: line-through; margin-left: 8px; }
.z-product-meta { display: flex; justify-content: space-between; align-items: center; margin-top: 4px; }

@media (max-width: 1024px) { .z-product-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 768px) { .z-product-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .z-product-grid { grid-template-columns: 1fr; } }

/* ===== SINGLE PRODUCT ===== */
.z-single-product { display: grid; grid-template-columns: 7fr 5fr; gap: 48px; align-items: start; }
.z-gallery { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.z-gallery-main { grid-column: 1 / -1; overflow: hidden; background: var(--z-surface-low); }
.z-gallery-main img { width: 100%; transition: transform 0.7s; }
.z-gallery-main:hover img { transform: scale(1.05); }
.z-gallery-thumb {
    aspect-ratio: 1; overflow: hidden; background: var(--z-surface-low);
    cursor: pointer; border: 2px solid transparent; transition: border-color 0.2s;
}
.z-gallery-thumb:hover, .z-gallery-thumb.active { border-color: var(--z-primary); }
.z-gallery-thumb img { width: 100%; height: 100%; object-fit: cover; }
.z-product-sidebar { position: sticky; top: 112px; }
.z-price-block { padding: 24px 0; border-top: 1px solid var(--z-outline-variant); border-bottom: 1px solid var(--z-outline-variant); display: flex; align-items: baseline; gap: 12px; }
.z-price-main { font-size: 30px; font-weight: 600; color: var(--z-primary); }
.z-price-old { font-size: 16px; color: var(--z-on-surface-variant); text-decoration: line-through; }
.z-price-shipping { font-size: 14px; font-weight: 600; color: var(--z-secondary); margin-left: auto; }
.z-features-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 24px; }
.z-feature-box {
    padding: 16px; background: var(--z-surface-container); border: 1px solid var(--z-outline-variant);
    border-radius: var(--z-radius); display: flex; flex-direction: column; gap: 4px;
}
.z-feature-box .material-symbols-outlined { color: var(--z-primary); }
.z-feature-box h4 { font-size: 14px; font-weight: 600; }
.z-feature-box p { font-size: 14px; color: var(--z-on-surface-variant); }
.z-stars { display: flex; align-items: center; color: var(--z-primary); }
.z-cta-block { padding-top: 24px; display: flex; flex-direction: column; gap: 12px; }
.z-cta-block .z-btn { width: 100%; padding: 16px; }
.z-trust-badges { display: flex; justify-content: center; gap: 24px; padding: 12px 0; }
.z-trust-badge { display: flex; align-items: center; gap: 4px; font-size: 12px; color: var(--z-on-surface-variant); }

@media (max-width: 768px) {
    .z-single-product { grid-template-columns: 1fr; }
    .z-product-sidebar { position: static; }
}

/* ===== SPECS ACCORDION ===== */
.z-spec-toggle {
    width: 100%; display: flex; justify-content: space-between; align-items: center;
    padding: 16px 0; border: none; background: none; cursor: pointer;
    border-bottom: 1px solid var(--z-outline-variant);
    font-size: 24px; font-weight: 500; color: var(--z-primary); text-align: left;
}
.z-spec-toggle .material-symbols-outlined { transition: transform 0.3s; }
.z-spec-toggle.open .material-symbols-outlined { transform: rotate(180deg); }
.z-spec-content { max-height: 0; overflow: hidden; transition: max-height 0.4s ease; }
.z-spec-content.open { max-height: 2000px; }
.z-spec-row { display: grid; grid-template-columns: 1fr 1fr; padding: 16px 0; border-bottom: 1px solid var(--z-outline-variant); }
.z-spec-label { font-size: 14px; font-weight: 600; color: var(--z-on-surface-variant); }
.z-spec-value { font-size: 16px; text-align: right; }

/* ===== WHY ZENITH BENTO ===== */
.z-bento { display: grid; grid-template-columns: repeat(12, 1fr); grid-template-rows: auto auto; gap: 16px; }
.z-bento-quality { grid-column: span 8; background: white; padding: 48px; border-radius: var(--z-radius-lg); position: relative; overflow: hidden; border: 1px solid var(--z-outline-variant); display: flex; flex-direction: column; justify-content: flex-end; }
.z-bento-ai { grid-column: span 4; background: var(--z-primary); color: var(--z-on-primary); padding: 48px; border-radius: var(--z-radius-lg); display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.z-bento-shield { grid-column: span 4; background: var(--z-surface-highest); padding: 48px; border-radius: var(--z-radius-lg); border: 1px solid var(--z-outline-variant); }
.z-bento-eco { grid-column: span 8; background: white; padding: 48px; border-radius: var(--z-radius-lg); border: 1px solid var(--z-outline-variant); display: flex; align-items: center; gap: 48px; }

@media (max-width: 768px) {
    .z-bento > * { grid-column: span 12 !important; }
}

/* ===== LEGAL PAGES ===== */
.z-legal-hero { background: var(--z-primary); padding: 48px 0; text-align: center; }
.z-legal-hero h1 { color: white; }
.z-legal-content { max-width: 768px; margin: 0 auto; padding: 80px var(--z-gutter); }
.z-legal-content h2 { font-size: 24px; font-weight: 500; color: var(--z-primary); margin: 32px 0 12px; }
.z-legal-content p { color: var(--z-on-surface-variant); margin-bottom: 16px; line-height: 1.7; }
.z-legal-content a { color: var(--z-primary); text-decoration: underline; }

/* ===== CTA BANNER ===== */
.z-cta-banner {
    background: var(--z-primary); color: white; border-radius: 16px;
    padding: 80px; text-align: center; overflow: hidden; position: relative;
}
.z-cta-banner h2 { font-size: 48px; font-weight: 600; }
.z-newsletter-form { display: flex; gap: 8px; max-width: 448px; margin: 24px auto 0; }
.z-newsletter-form input {
    flex: 1; background: var(--z-primary-container); border: 1px solid var(--z-outline);
    color: white; padding: 12px 16px; border-radius: var(--z-radius-sm);
}
.z-newsletter-form input::placeholder { color: var(--z-on-primary-container); }

@media (max-width: 768px) {
    .z-cta-banner { padding: 48px 24px; }
    .z-cta-banner h2 { font-size: 32px; }
    .z-newsletter-form { flex-direction: column; }
}

/* ===== ANIMATIONS ===== */
.z-animate {
    opacity: 0; transform: translateY(40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.z-animate.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
    .z-animate { opacity: 1; transform: none; transition: none; }
}

/* ===== WOOCOMMERCE OVERRIDES ===== */
.woocommerce .products { display: grid !important; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.woocommerce ul.products li.product { margin: 0 !important; padding: 0 !important; width: 100% !important; float: none !important; }
.woocommerce ul.products li.product a img { border-radius: var(--z-radius); aspect-ratio: 4/5; object-fit: contain; background: var(--z-surface-low); padding: 16px; }
.woocommerce ul.products li.product .price { color: var(--z-primary) !important; font-weight: 700; font-size: 20px !important; }
.woocommerce ul.products li.product h2 { font-size: 18px !important; font-weight: 600 !important; color: var(--z-primary); }
.woocommerce .woocommerce-breadcrumb { font-size: 12px; color: var(--z-on-surface-variant); margin-bottom: 24px; }
.woocommerce .woocommerce-breadcrumb a { color: var(--z-on-surface-variant); }
.woocommerce .woocommerce-breadcrumb a:hover { color: var(--z-primary); }

.woocommerce #respond input#submit, .woocommerce a.button, .woocommerce button.button, .woocommerce input.button,
.woocommerce #respond input#submit.alt, .woocommerce a.button.alt, .woocommerce button.button.alt, .woocommerce input.button.alt {
    background: var(--z-primary) !important; color: white !important; border-radius: var(--z-radius-sm) !important;
    font-weight: 600 !important; letter-spacing: 0.05em !important; text-transform: uppercase !important;
    padding: 12px 48px !important; border: none !important; transition: opacity 0.2s !important;
}
.woocommerce #respond input#submit:hover, .woocommerce a.button:hover, .woocommerce button.button:hover,
.woocommerce #respond input#submit.alt:hover, .woocommerce a.button.alt:hover, .woocommerce button.button.alt:hover {
    background: var(--z-primary) !important; opacity: 0.9 !important;
}

.woocommerce div.product div.images { margin-bottom: 24px; }
.woocommerce div.product .product_title { font-size: 48px; font-weight: 600; letter-spacing: -0.02em; color: var(--z-primary); }
.woocommerce div.product p.price { font-size: 30px !important; font-weight: 600; color: var(--z-primary); }
.woocommerce div.product .woocommerce-tabs { margin-top: 48px; }
.woocommerce div.product .woocommerce-tabs ul.tabs li a { color: var(--z-on-surface-variant); font-weight: 500; }
.woocommerce div.product .woocommerce-tabs ul.tabs li.active a { color: var(--z-primary); font-weight: 700; }

.woocommerce-cart .woocommerce { padding: 48px 0; }
.woocommerce-checkout .woocommerce { padding: 48px 0; }

.woocommerce .quantity .qty { border: 1px solid var(--z-outline-variant); border-radius: var(--z-radius-sm); padding: 8px 12px; }
.woocommerce table.shop_table { border: 1px solid var(--z-outline-variant) !important; border-radius: var(--z-radius) !important; }
.woocommerce table.shop_table th { background: var(--z-surface-low); color: var(--z-primary); font-weight: 600; }

.woocommerce .woocommerce-message, .woocommerce .woocommerce-info {
    border-top-color: var(--z-secondary) !important;
}
.woocommerce .woocommerce-message::before, .woocommerce .woocommerce-info::before {
    color: var(--z-secondary) !important;
}

@media (max-width: 768px) {
    .woocommerce .products { grid-template-columns: repeat(2, 1fr) !important; }
    .woocommerce div.product .product_title { font-size: 32px; }
}

/* ===== MATERIAL ICONS ===== */
.material-symbols-outlined {
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
    display: inline-block; line-height: 1; vertical-align: middle;
}