/* =========================================
   THUANPHAT THEME — MAIN CSS
   ========================================= */

/* --- Variables --- */
:root {
    --color-primary:     #225280;
    --color-primary-dark:#1a3f63;
    --color-accent:      #71bf44;
    --color-accent-dark: #5aa033;
    --color-text:        #2d2d2d;
    --color-text-muted:  #6b7280;
    --color-light:       #f8f8f5;
    --color-border:      #e5e7eb;
    --color-white:       #ffffff;
    --font-heading:      'Playfair Display', Georgia, serif;
    --font-body:         'Lato', -apple-system, sans-serif;
    --container:         1200px;
    --container-pad:     1.5rem;
    --radius:            8px;
    --radius-lg:         16px;
    --shadow:            0 4px 24px rgba(0,0,0,.08);
    --shadow-hover:      0 8px 32px rgba(0,0,0,.14);
    --transition:        .25s ease;
    --header-h:          72px;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent); }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.25;
    color: var(--color-text);
}
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.6rem); }
h4 { font-size: 1.1rem; }
p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

/* --- Container --- */
.container {
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: var(--container-pad);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .75rem 1.75rem;
    border-radius: var(--radius);
    font-weight: 700;
    font-size: .95rem;
    letter-spacing: .03em;
    transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-primary { background: var(--color-accent); color: var(--color-white); border-color: var(--color-accent); }
.btn-primary:hover { background: var(--color-accent-dark); border-color: var(--color-accent-dark); color: var(--color-white); }
.btn-outline { background: transparent; color: var(--color-white); border-color: var(--color-white); }
.btn-outline:hover { background: var(--color-white); color: var(--color-primary); }
.btn-secondary { background: var(--color-primary); color: var(--color-white); border-color: var(--color-primary); }
.btn-secondary:hover { background: var(--color-primary-dark); border-color: var(--color-primary-dark); color: var(--color-white); }

/* --- Section helpers --- */
.section { padding-block: 5rem; }
.section-sm { padding-block: 3rem; }
.section-dark { background: var(--color-primary); color: var(--color-white); }
.section-dark h2, .section-dark h3 { color: var(--color-white); }
.section-light { background: var(--color-light); }
.section-header { text-align: center; margin-bottom: 3.5rem; }
.section-header h2 { margin-bottom: .75rem; }
.section-header p { color: var(--color-text-muted); max-width: 560px; margin-inline: auto; }
.section-header .divider {
    width: 60px; height: 3px;
    background: var(--color-accent);
    margin: .75rem auto 0;
    border-radius: 2px;
}

/* =========================================
   HEADER
   ========================================= */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(255,255,255,.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition), box-shadow var(--transition);
    height: var(--header-h);
}
.site-header.scrolled {
    border-bottom-color: var(--color-border);
    box-shadow: 0 2px 16px rgba(0,0,0,.08);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-h);
    gap: 2rem;
}
.site-logo a,
.site-logo .logo-text { font-family: var(--font-heading); font-size: 1.4rem; font-weight: 700; color: var(--color-primary); }
.site-logo img { max-height: 52px; width: auto; }

/* Nav */
.site-nav { flex: 1; }
.nav-menu { display: flex; align-items: center; gap: .25rem; }
.nav-menu li { position: relative; }
.nav-menu a {
    display: block;
    padding: .5rem .85rem;
    font-weight: 700;
    font-size: .9rem;
    letter-spacing: .03em;
    color: var(--color-text);
    border-radius: var(--radius);
    transition: color var(--transition), background var(--transition);
}
.nav-menu a:hover,
.nav-menu .current-menu-item > a,
.nav-menu .current_page_item > a { color: var(--color-primary); background: rgba(34,82,128,.06); }

/* Dropdown */
.nav-menu .sub-menu {
    position: absolute;
    top: calc(100% + .5rem);
    left: 0;
    min-width: 220px;
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
    border: 1px solid var(--color-border);
    z-index: 10;
}
.nav-menu li:hover > .sub-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-menu .sub-menu a { font-weight: 400; padding: .6rem 1rem; border-radius: 0; }

/* Header actions */
.header-actions { display: flex; align-items: center; gap: 1rem; }
.cart-link {
    position: relative;
    display: flex;
    align-items: center;
    color: var(--color-text);
    padding: .4rem;
    border-radius: var(--radius);
    transition: color var(--transition);
}
.cart-link:hover { color: var(--color-primary); }
.cart-count {
    position: absolute;
    top: -4px; right: -4px;
    background: var(--color-accent);
    color: #fff;
    font-size: .65rem;
    font-weight: 700;
    min-width: 18px; height: 18px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
}
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: .5rem; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--color-text); border-radius: 2px; transition: transform var(--transition), opacity var(--transition); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

body { padding-top: var(--header-h); }

/* =========================================
   HERO
   ========================================= */
.hero {
    position: relative;
    min-height: 88vh;
    display: flex;
    align-items: center;
    background: var(--color-primary);
    overflow: hidden;
}
.hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(34,82,128,.85) 0%, rgba(34,82,128,.4) 100%);
}
.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
    color: var(--color-white);
    padding-block: 5rem;
}
.hero-badge {
    display: inline-block;
    background: var(--color-accent);
    color: #fff;
    font-size: .8rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    padding: .3rem .9rem;
    border-radius: 50px;
    margin-bottom: 1.5rem;
}
.hero-content h1 {
    color: var(--color-white);
    margin-bottom: 1.25rem;
    text-shadow: 0 2px 12px rgba(0,0,0,.2);
}
.hero-content p {
    font-size: 1.15rem;
    opacity: .9;
    margin-bottom: 2.25rem;
    max-width: 540px;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* =========================================
   SERVICES
   ========================================= */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}
.service-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform var(--transition), box-shadow var(--transition);
    border: 1px solid var(--color-border);
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.service-icon {
    width: 72px; height: 72px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 1.5rem;
    color: #fff;
}
.service-card h3 { margin-bottom: .75rem; }
.service-card p { color: var(--color-text-muted); font-size: .95rem; }

/* =========================================
   FEATURED PRODUCTS
   ========================================= */
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}
.product-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    border: 1px solid var(--color-border);
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.product-card__image {
    aspect-ratio: 1;
    overflow: hidden;
    background: var(--color-light);
}
.product-card__image img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.product-card:hover .product-card__image img { transform: scale(1.06); }
.product-card__body { padding: 1.25rem; }
.product-card__title { font-size: 1rem; font-weight: 700; margin-bottom: .5rem; line-height: 1.35; }
.product-card__title a:hover { color: var(--color-primary); }
.product-card__price { color: var(--color-primary); font-weight: 700; font-size: 1.05rem; margin-bottom: 1rem; }
.product-card__price del { color: var(--color-text-muted); font-weight: 400; font-size: .9rem; margin-right: .4rem; }
.product-card__btn {
    display: block;
    text-align: center;
    padding: .6rem 1rem;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius);
    font-size: .85rem;
    font-weight: 700;
    transition: background var(--transition);
}
.product-card__btn:hover { background: var(--color-primary-dark); color: #fff; }
.section-footer { text-align: center; margin-top: 2.5rem; }

/* =========================================
   PORTFOLIO
   ========================================= */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}
.portfolio-item {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
    border-radius: var(--radius-lg);
    cursor: pointer;
}
.portfolio-item img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.portfolio-item:hover img { transform: scale(1.08); }
.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(34,82,128,.85) 0%, transparent 60%);
    opacity: 0;
    transition: opacity var(--transition);
    display: flex;
    align-items: flex-end;
    padding: 1.5rem;
}
.portfolio-item:hover .portfolio-overlay { opacity: 1; }
.portfolio-overlay h4 { color: #fff; font-size: 1rem; }
.portfolio-overlay span { color: rgba(255,255,255,.75); font-size: .85rem; }

/* =========================================
   LATEST POSTS
   ========================================= */
.posts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}
.post-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    border: 1px solid var(--color-border);
}
.post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.post-card__image {
    aspect-ratio: 16/9;
    overflow: hidden;
    background: var(--color-light);
}
.post-card__image img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.post-card:hover .post-card__image img { transform: scale(1.05); }
.post-card__body { padding: 1.5rem; }
.post-card__meta { font-size: .8rem; color: var(--color-text-muted); margin-bottom: .75rem; display: flex; gap: .75rem; }
.post-card__meta a:hover { color: var(--color-accent); }
.post-card__title { font-size: 1.1rem; margin-bottom: .75rem; line-height: 1.4; }
.post-card__title a:hover { color: var(--color-primary); }
.post-card__excerpt { color: var(--color-text-muted); font-size: .9rem; margin-bottom: 1.25rem; }
.read-more { font-size: .9rem; font-weight: 700; color: var(--color-primary); display: inline-flex; align-items: center; gap: .3rem; }
.read-more:hover { color: var(--color-accent); gap: .6rem; }

/* =========================================
   CONTACT CTA
   ========================================= */
.contact-cta { background: var(--color-primary); }
.contact-cta-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}
.contact-cta h2 { color: #fff; margin-bottom: 1rem; }
.contact-cta p { color: rgba(255,255,255,.85); margin-bottom: 2rem; }
.contact-cta-info { display: flex; flex-direction: column; gap: 1rem; }
.contact-cta-info-item { display: flex; align-items: center; gap: 1rem; color: rgba(255,255,255,.9); }
.contact-cta-info-item svg { flex-shrink: 0; color: var(--color-accent); }
.contact-cta-info-item a { color: inherit; }
.contact-cta-info-item a:hover { color: var(--color-accent); }

/* =========================================
   FOOTER
   ========================================= */
.site-footer { background: #0f1e2e; color: rgba(255,255,255,.8); }
.footer-main { padding-block: 4rem; }
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 3rem;
}
.footer-col__title { color: #fff; font-size: 1rem; margin-bottom: 1.25rem; letter-spacing: .05em; text-transform: uppercase; font-family: var(--font-body); font-weight: 700; }
.footer-logo-text { font-family: var(--font-heading); font-size: 1.5rem; color: #fff; margin-bottom: .75rem; }
.footer-tagline { font-size: .9rem; line-height: 1.6; max-width: 280px; }
.footer-social { display: flex; gap: .75rem; margin-top: 1.25rem; }
.footer-social a {
    width: 38px; height: 38px;
    background: rgba(255,255,255,.1);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: rgba(255,255,255,.8);
    transition: background var(--transition), color var(--transition);
}
.footer-social a:hover { background: var(--color-accent); color: #fff; }
.footer-nav-menu { display: flex; flex-direction: column; gap: .5rem; }
.footer-nav-menu a { font-size: .9rem; color: rgba(255,255,255,.7); transition: color var(--transition); }
.footer-nav-menu a:hover { color: var(--color-accent); }
.footer-contact-list { display: flex; flex-direction: column; gap: 1rem; }
.footer-contact-list li { display: flex; align-items: flex-start; gap: .75rem; font-size: .9rem; }
.footer-contact-list svg { margin-top: .15rem; flex-shrink: 0; color: var(--color-accent); }
.footer-contact-list a:hover { color: var(--color-accent); }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.1);
    padding-block: 1.25rem;
    text-align: center;
    font-size: .85rem;
    color: rgba(255,255,255,.5);
}

/* =========================================
   PAGE TEMPLATES
   ========================================= */
.page-hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding-block: 4rem;
    text-align: center;
    color: #fff;
}
.page-hero h1 { color: #fff; margin-bottom: .5rem; }
.page-hero .breadcrumb { font-size: .9rem; color: rgba(255,255,255,.7); }
.page-hero .breadcrumb a { color: var(--color-accent); }

.main-content { padding-block: 4rem; }
.content-with-sidebar {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 3rem;
    align-items: start;
}

/* =========================================
   SINGLE POST
   ========================================= */
.post-single { max-width: 780px; }
.post-header { margin-bottom: 2rem; }
.post-header h1 { margin-bottom: 1rem; }
.post-meta { display: flex; gap: 1rem; color: var(--color-text-muted); font-size: .9rem; flex-wrap: wrap; }
.post-thumbnail { border-radius: var(--radius-lg); overflow: hidden; margin-bottom: 2.5rem; }
.post-thumbnail img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.post-content { font-size: 1.05rem; line-height: 1.85; }
.post-content h2, .post-content h3 { margin-top: 2rem; margin-bottom: .75rem; }
.post-content p { margin-bottom: 1.25rem; }
.post-content img { border-radius: var(--radius); margin-block: 1.5rem; }
.post-content ul, .post-content ol { padding-left: 1.5rem; margin-bottom: 1.25rem; }
.post-content li { margin-bottom: .4rem; }

/* =========================================
   SIDEBAR & WIDGETS
   ========================================= */
.sidebar { position: sticky; top: calc(var(--header-h) + 1.5rem); }
.widget { margin-bottom: 2rem; background: var(--color-white); border-radius: var(--radius-lg); padding: 1.5rem; box-shadow: var(--shadow); border: 1px solid var(--color-border); }
.widget__title { font-size: 1rem; color: var(--color-primary); margin-bottom: 1rem; padding-bottom: .75rem; border-bottom: 2px solid var(--color-accent); font-family: var(--font-body); letter-spacing: .05em; text-transform: uppercase; }
.widget ul { display: flex; flex-direction: column; gap: .5rem; }
.widget ul li a { font-size: .9rem; color: var(--color-text); display: flex; justify-content: space-between; padding: .35rem 0; border-bottom: 1px solid var(--color-border); }
.widget ul li:last-child a { border-bottom: none; }
.widget ul li a:hover { color: var(--color-accent); }

/* =========================================
   SEARCH & 404
   ========================================= */
.search-results-header { margin-bottom: 2rem; }
.search-form-wrap { margin-bottom: 3rem; }
.search-form { display: flex; gap: .75rem; }
.search-form input[type="search"] {
    flex: 1;
    padding: .75rem 1.25rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: border-color var(--transition);
}
.search-form input[type="search"]:focus { outline: none; border-color: var(--color-primary); }
.search-form button { padding: .75rem 1.5rem; background: var(--color-primary); color: #fff; border-radius: var(--radius); font-weight: 700; transition: background var(--transition); }
.search-form button:hover { background: var(--color-primary-dark); }
.page-404-wrap { text-align: center; padding-block: 6rem; }
.page-404-wrap h1 { font-size: clamp(5rem, 15vw, 10rem); color: var(--color-border); margin-bottom: 1rem; }
.page-404-wrap h2 { margin-bottom: 1rem; }
.page-404-wrap p { color: var(--color-text-muted); margin-bottom: 2rem; }

/* =========================================
   PAGINATION
   ========================================= */
.posts-pagination { margin-top: 3rem; display: flex; justify-content: center; gap: .5rem; }
.posts-pagination a, .posts-pagination span {
    display: flex; align-items: center; justify-content: center;
    width: 42px; height: 42px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    font-weight: 700;
    color: var(--color-text);
    transition: all var(--transition);
}
.posts-pagination a:hover, .posts-pagination .current {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 1024px) {
    .products-grid { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-col--brand { grid-column: 1 / -1; }
    .contact-cta-inner { gap: 2rem; }
}

@media (max-width: 768px) {
    :root { --header-h: 64px; }
    .site-nav {
        position: fixed;
        top: var(--header-h); left: 0; right: 0;
        background: var(--color-white);
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow);
        padding: 1rem var(--container-pad) 1.5rem;
        transform: translateY(-110%);
        transition: transform var(--transition);
        z-index: 999;
    }
    .site-nav.nav-open { transform: translateY(0); }
    .nav-menu { flex-direction: column; gap: 0; align-items: stretch; }
    .nav-menu a { padding: .75rem .5rem; border-bottom: 1px solid var(--color-border); border-radius: 0; }
    .nav-menu .sub-menu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: none; border-radius: 0; padding-left: 1rem; }
    .nav-toggle { display: flex; }

    .services-grid { grid-template-columns: 1fr; }
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
    .posts-grid { grid-template-columns: 1fr; }
    .contact-cta-inner { grid-template-columns: 1fr; gap: 2.5rem; }
    .content-with-sidebar { grid-template-columns: 1fr; }
    .sidebar { position: static; }
    .footer-grid { grid-template-columns: 1fr; }
    .hero { min-height: 70vh; }
    .section { padding-block: 3.5rem; }
}

@media (max-width: 480px) {
    .products-grid { grid-template-columns: 1fr; }
    .portfolio-grid { grid-template-columns: 1fr; }
    .hero-actions { flex-direction: column; }
    .btn { width: 100%; justify-content: center; }
}