/* 
 * Sino Petroleum Theme - Main Stylesheet
 * Inspired by Blocksy + Elementor demo
 */

/* ============================================
   1. CSS Variables & Reset
   ============================================ */
:root {
    --color-primary: #1b46b7;
    --color-primary-dark: #192a3d;
    --color-primary-light: #3a4f66;
    --color-text: #3A4F66;
    --color-heading: #192a3d;
    --color-bg: #FAFBFC;
    --color-bg-light: #f2f5f7;
    --color-border: #e1e8ed;
    --color-white: #ffffff;
    --font-family: 'Poppins', sans-serif;
    --container-width: 1290px;
    --container-padding: 20px;
}

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

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-bg);
    font-size: 16px;
    line-height: 1.6;
    overflow-x: hidden;
}

a { color: var(--color-primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-primary-dark); }

img { max-width: 100%; height: auto; }
h1, h2, h3, h4, h5, h6 { color: var(--color-heading); font-weight: 700; line-height: 1.3; margin-top: 0; }
h1 { font-size: 40px; }
h2 { font-size: 35px; }
h3 { font-size: 30px; }
h4 { font-size: 25px; }
h5 { font-size: 20px; }
h6 { font-size: 16px; }

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 12px 30px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
}
.btn-primary:hover {
    background: var(--color-primary-dark);
    color: var(--color-white);
}

/* ============================================
   2. Header
   ============================================ */
.site-header {
    background: var(--color-white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    position: relative;
    z-index: 100;
}

.header-top {
    background: var(--color-primary-dark);
    color: var(--color-white);
    font-size: 13px;
    padding: 8px 0;
}
.header-top .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; }
.header-top-left span { margin-right: 20px; display: inline-flex; align-items: center; gap: 5px; }
.header-top-left i { color: var(--color-primary); }
.top-menu { list-style: none; margin: 0; padding: 0; display: flex; gap: 15px; }
.top-menu a { color: rgba(255,255,255,0.8); font-size: 13px; }
.top-menu a:hover { color: #fff; }

.header-main {
    padding: 15px 0;
}
.header-main .container { display: flex; align-items: center; justify-content: space-between; }

.site-branding .custom-logo { max-height: 55px; width: auto; }
.site-title { font-size: 24px; font-weight: 700; color: var(--color-heading); }

/* Navigation */
.main-navigation { display: flex; align-items: center; }
.main-navigation .nav-menu { list-style: none; margin: 0; padding: 0; display: flex; gap: 0; }
.main-navigation .nav-menu > li { position: relative; }
.main-navigation .nav-menu > li > a {
    display: block;
    padding: 10px 18px;
    color: var(--color-heading);
    font-weight: 500;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: color 0.2s;
}
.main-navigation .nav-menu > li > a:hover,
.main-navigation .nav-menu > li.current-menu-item > a { color: var(--color-primary); }

/* Dropdown */
.main-navigation .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--color-white);
    min-width: 220px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s;
    list-style: none;
    margin: 0;
    padding: 10px 0;
    z-index: 999;
    border-radius: 4px;
}
.main-navigation .nav-menu > li:hover > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.main-navigation .sub-menu li { position: relative; }
.main-navigation .sub-menu a {
    display: block;
    padding: 8px 20px;
    color: var(--color-text);
    font-size: 13px;
    white-space: nowrap;
}
.main-navigation .sub-menu a:hover { background: var(--color-bg-light); color: var(--color-primary); }

/* Menu Toggle (Mobile) */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}
.menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--color-heading);
    border-radius: 2px;
    transition: all 0.3s;
}

.header-search .search-toggle {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    color: var(--color-heading);
    padding: 8px;
}

/* ============================================
   3. Page Banner
   ============================================ */
.page-banner {
    padding: 60px 0;
    text-align: center;
    color: var(--color-white);
}
.page-banner .page-title {
    color: var(--color-white);
    margin: 0;
    font-size: 38px;
    text-transform: uppercase;
}

/* ============================================
   4. Pages
   ============================================ */
.page-content {
    display: flex;
    gap: 40px;
    padding: 50px 0;
}
.content-area { flex: 1; }
.sidebar { width: 300px; flex-shrink: 0; }

/* ============================================
   5. Products Archive
   ============================================ */
.product-archive-layout {
    display: flex;
    gap: 30px;
    padding: 50px 0;
}
.product-sidebar { width: 260px; flex-shrink: 0; }
.product-sidebar h3 {
    font-size: 20px;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-primary);
}
.product-categories { list-style: none; margin: 0; padding: 0; }
.product-categories li { border-bottom: 1px solid var(--color-border); }
.product-categories a {
    display: block;
    padding: 10px 0;
    color: var(--color-text);
    font-size: 14px;
    transition: all 0.2s;
}
.product-categories li.active a,
.product-categories a:hover { color: var(--color-primary); padding-left: 8px; }

.product-content { flex: 1; }

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}
.product-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    overflow: hidden;
    transition: all 0.3s;
}
.product-card:hover {
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transform: translateY(-3px);
}
.product-image { display: block; overflow: hidden; }
.product-image img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.3s;
}
.product-card:hover .product-image img { transform: scale(1.05); }
.product-info { padding: 15px; }
.product-info h3 { margin: 0 0 8px; font-size: 16px; }
.product-info h3 a { color: var(--color-heading); }
.product-info h3 a:hover { color: var(--color-primary); }
.product-excerpt { font-size: 13px; color: var(--color-primary-light); margin-bottom: 12px; }
.btn-view {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
}
.btn-view:hover { color: var(--color-primary-dark); }

/* ============================================
   6. Single Product
   ============================================ */
.single-product { padding: 50px 0; }
.product-detail-layout { display: flex; gap: 40px; }
.product-gallery { width: 45%; flex-shrink: 0; }
.product-detail-info { flex: 1; }

.main-image {
    border: 1px solid var(--color-border);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 15px;
}
.main-image img { width: 100%; }

.gallery-thumbs { display: flex; gap: 10px; flex-wrap: wrap; }
.thumb-item {
    width: 70px;
    height: 70px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    overflow: hidden;
    cursor: pointer;
    transition: border-color 0.2s;
}
.thumb-item:hover { border-color: var(--color-primary); }
.thumb-item img { width: 100%; height: 100%; object-fit: cover; }

.product-detail-info .product-title {
    font-size: 28px;
    margin-bottom: 20px;
}
.product-detail-info .product-description { margin-bottom: 20px; line-height: 1.8; }
.product-meta { margin-bottom: 25px; font-size: 14px; }
.product-meta a { color: var(--color-primary); font-weight: 500; }

.btn-inquiry {
    padding: 15px 40px;
    font-size: 16px;
}

/* ============================================
   7. Archive / Blog
   ============================================ */
.archive-wrap { padding: 50px 0; }
.posts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}
.post-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    overflow: hidden;
}
.post-thumb img { width: 100%; height: 200px; object-fit: cover; }
.post-info { padding: 20px; }
.post-info h3 { margin: 0 0 10px; font-size: 18px; }
.post-info h3 a { color: var(--color-heading); }
.post-excerpt { font-size: 14px; color: var(--color-primary-light); margin-bottom: 15px; }
.read-more { font-weight: 600; font-size: 13px; text-transform: uppercase; }

.pagination { margin-top: 40px; text-align: center; }
.pagination .page-numbers {
    display: inline-block;
    padding: 8px 15px;
    margin: 0 3px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 14px;
}
.pagination .current { background: var(--color-primary); color: var(--color-white); border-color: var(--color-primary); }

/* ============================================
   8. Footer
   ============================================ */
.site-footer {
    background: var(--color-primary-dark);
    color: rgba(255,255,255,0.8);
}
.footer-main { padding: 60px 0 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 30px; }
.footer-col h4 {
    color: var(--color-white);
    font-size: 18px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}
.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--color-primary);
}
.footer-about p { font-size: 14px; line-height: 1.7; }
.footer-contact p { font-size: 13px; margin: 8px 0; display: flex; align-items: center; gap: 8px; }
.footer-contact i { color: var(--color-primary); width: 16px; }

.footer-menu { list-style: none; margin: 0; padding: 0; }
.footer-menu li { margin-bottom: 8px; }
.footer-menu a { color: rgba(255,255,255,0.7); font-size: 13px; }
.footer-menu a:hover { color: var(--color-primary); padding-left: 3px; }

.footer-inquiry p { font-size: 13px; margin-bottom: 15px; }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
}
.footer-bottom p { margin: 0; }

/* ============================================
   9. 404
   ============================================ */
.error-404 { text-align: center; padding: 80px 0; }
.error-404 h2 { font-size: 120px; color: var(--color-primary); margin: 0; line-height: 1; }
.error-404 p { font-size: 18px; margin-bottom: 30px; }

/* ============================================
   10. WordPress Defaults
   ============================================ */
.wp-block-image { margin-bottom: 20px; }
.aligncenter { text-align: center; }
.wp-caption { max-width: 100%; }