/* ============================================================
   DURGAPUR INDUSTRIAL STORE – MODERN LIGHT DESIGN
   ============================================================ */

/* --- VARIABLES --- */
:root {
    --primary:   #2563EB;
    --primary-dark: #1D4ED8;
    --accent:    #F59E0B;
    --white:     #FFFFFF;
    --light-bg:  #F8FAFC;
    --border:    #E2E8F0;
    --text:      #0F172A;
    --text-muted:#64748B;
    --radius:    12px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --shadow:    0 10px 25px -5px rgba(0,0,0,0.05), 0 8px 10px -6px rgba(0,0,0,0.02);
    --shadow-hover: 0 20px 40px -10px rgba(0,0,0,0.1);
    --transition: 0.2s ease;
    --max-width: 1280px;
}

/* --- RESET --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
    font-family: 'Poppins', sans-serif;
    background: var(--white);
    color: var(--text);
    line-height: 1.6;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* --- UTILITY --- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
.section { padding: 60px 0; }
.section-light { background: var(--light-bg); }
.text-center { text-align: center; }

/* --- TYPOGRAPHY --- */
h1, h2, h3, .btn, .nav-link, .section-title, .hero-title, .search-hero-title, .cat-name, .product-name {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
}

/* --- TOPBAR --- */
.topbar {
    background: #F1F5F9;
    font-size: 0.8rem;
    padding: 6px 0;
    border-bottom: 1px solid var(--border);
}
.topbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}
.topbar-contact a, .topbar-user a {
    color: var(--text-muted);
    margin: 0 8px;
    transition: color var(--transition);
}
.topbar-contact a:hover, .topbar-user a:hover { color: var(--primary); }

/* --- HEADER --- */
.site-header {
    background: var(--white);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    border-bottom: 1px solid var(--border);
}
.header-inner {
    display: flex;
    align-items: center;
    gap: 24px;
    height: 70px;
}
.logo { display: flex; align-items: center; gap: 8px; }
.logo-img { width: 40px; height: 40px; }
.logo-text { display: flex; flex-direction: column; line-height: 1; }
.logo-main {
    font-family: 'Montserrat', sans-serif;
    font-weight: 900;
    font-size: 1.3rem;
    color: #0F172A;
    letter-spacing: 0.05em;
}
.logo-sub {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 0.55rem;
    color: var(--primary);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

/* Header search */
.header-search {
    flex: 1;
    max-width: 420px;
    display: flex;
    border-radius: 40px;
    overflow: hidden;
    border: 2px solid #E2E8F0;
    transition: border-color var(--transition);
}
.header-search:focus-within { border-color: var(--primary); }
.header-search input {
    flex: 1;
    padding: 10px 18px;
    border: none;
    font-size: 0.9rem;
    outline: none;
    background: #F8FAFC;
}
.header-search button {
    padding: 10px 18px;
    background: var(--primary);
    color: white;
    border: none;
    cursor: pointer;
    transition: background var(--transition);
}
.header-search button:hover { background: var(--primary-dark); }

/* Header nav */
.header-nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
    font-weight: 600;
    font-size: 0.9rem;
    padding: 8px 12px;
    border-radius: var(--radius);
    color: var(--text-muted);
    transition: all var(--transition);
}
.nav-link:hover, .nav-link.active { color: var(--primary); background: #F1F5F9; }
.cart-link { position: relative; }
.cart-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--accent);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    min-width: 18px; height: 18px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
}

/* Hamburger */
.hamburger { display: none; flex-direction: column; gap: 5px; padding: 4px; }
.hamburger span { width: 26px; height: 3px; background: var(--text); border-radius: 2px; transition: var(--transition); }
.hamburger.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* Mobile nav */
.mobile-nav {
    display: none; flex-direction: column; background: white;
    max-height: 0; overflow: hidden; transition: max-height 0.3s ease;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.05);
}
.mobile-nav.open { max-height: 500px; padding: 8px 0; }
.mobile-nav a {
    padding: 12px 20px;
    font-weight: 600;
    color: var(--text);
    border-bottom: 1px solid var(--border);
}
.mobile-nav a:hover { color: var(--primary); }

/* --- HERO SLIDER --- */
.hero-slider {
    position: relative;
    height: clamp(320px, 42vw, 480px);
    background: #E2E8F0;
    overflow: hidden;
}
.hero-slide { position: absolute; inset: 0; opacity: 0; transition: opacity 0.7s ease; }
.hero-slide.active { opacity: 1; position: relative; }
.hero-slide img { width: 100%; height: 100%; object-fit: cover; }
.hero-default {
    background: linear-gradient(135deg, #E0E7FF 0%, #DBEAFE 100%);
}
.hero-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(90deg, rgba(255,255,255,0.9) 30%, rgba(255,255,255,0.3));
    display: flex; align-items: center;
}
.hero-content { max-width: 600px; }
.hero-eyebrow {
    font-weight: 600; font-size: 0.9rem; letter-spacing: 0.15em;
    color: var(--primary); text-transform: uppercase; margin-bottom: 10px;
}
.hero-title {
    font-family: 'Montserrat', sans-serif;
    font-weight: 900;
    font-size: clamp(2rem, 4.5vw, 3.5rem);
    color: #0F172A;
    line-height: 1.1;
    margin-bottom: 16px;
}
.hero-desc { color: #475569; margin-bottom: 24px; max-width: 400px; }

.btn {
    display: inline-block;
    font-weight: 700;
    padding: 12px 28px;
    border-radius: 40px;
    background: var(--primary);
    color: white;
    transition: all var(--transition);
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.03em;
}
.btn-primary { background: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 10px 15px -5px rgba(37,99,235,0.3); }

.slider-btn {
    position: absolute; top: 50%; transform: translateY(-50%);
    background: rgba(255,255,255,0.9); color: var(--primary);
    width: 40px; height: 40px; border-radius: 50%;
    font-size: 1.6rem; display: flex; align-items: center; justify-content: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    z-index: 5; transition: background var(--transition);
}
.slider-btn:hover { background: white; }
.slider-btn.prev { left: 20px; }
.slider-btn.next { right: 20px; }
.slider-dots { position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); display: flex; gap: 8px; z-index: 5; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: #CBD5E1; transition: 0.2s; }
.dot.active { background: var(--primary); transform: scale(1.3); }

/* --- SEARCH HERO (big standalone) --- */
.search-hero {
    background: #F1F5F9;
    padding: 30px 0;
}
.search-hero-title {
    font-size: 1.8rem;
    text-align: center;
    margin-bottom: 20px;
}
.search-hero-form {
    display: flex;
    max-width: 650px;
    margin: 0 auto;
    border-radius: 50px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}
.search-hero-form input {
    flex: 1;
    padding: 16px 24px;
    border: 2px solid #E2E8F0;
    border-right: none;
    font-size: 1rem;
    outline: none;
    border-radius: 50px 0 0 50px;
    font-family: 'Poppins', sans-serif;
}
.search-hero-form .btn {
    border-radius: 0 50px 50px 0;
    padding: 16px 32px;
}

/* --- TRUST STRIP --- */
.trust-strip {
    background: var(--primary);
    padding: 10px 0;
    color: white;
}
.trust-strip-inner {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 16px;
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* --- SECTION HEADERS --- */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 32px;
    flex-wrap: wrap;
    gap: 12px;
}
.section-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    position: relative;
    padding-bottom: 8px;
}
.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}
.text-center .section-title::after {
    left: 50%;
    transform: translateX(-50%);
}
.see-all {
    font-weight: 600;
    color: var(--primary);
    letter-spacing: 0.03em;
}

/* --- CATEGORIES --- */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 20px;
}
.category-card {
    background: white;
    border-radius: var(--radius);
    padding: 24px 12px 16px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: all var(--transition);
}
.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary);
}
.cat-img-cont {
    width: 80px; height: 80px;
    margin: 0 auto 12px;
    background: var(--light-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.cat-img-cont img {
    width: 70%;
    height: 70%;
    object-fit: contain;
}
.cat-name {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

/* --- PRODUCTS GRID --- */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 24px;
}
.product-card {
    background: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: all var(--transition);
}
.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}
.product-img-wrap {
    position: relative;
    aspect-ratio: 1 / 1;
    background: #F8FAFC;
    overflow: hidden;
}
.product-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 16px;
    transition: transform 0.3s ease;
}
.product-card:hover .product-img-wrap img { transform: scale(1.05); }
.product-badge {
    position: absolute;
    top: 10px; left: 10px;
    background: var(--accent);
    color: white;
    font-weight: 700;
    font-size: 0.7rem;
    padding: 4px 10px;
    border-radius: 20px;
    text-transform: uppercase;
}
.product-info { padding: 16px; }
.product-cat {
    font-size: 0.75rem;
    color: var(--primary);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.05em;
}
.product-name {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 1rem;
    margin: 6px 0 12px;
    line-height: 1.3;
    color: var(--text);
}
.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.product-price {
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--primary-dark);
}
.product-stock {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 3px 10px;
    border-radius: 20px;
}
.in-stock  { background: #D1FAE5; color: #065F46; }
.out-stock { background: #FEE2E2; color: #991B1B; }

/* --- FEATURES / WHY US --- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin-top: 40px;
}
.feature-card {
    background: white;
    padding: 28px 24px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
}
.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}
.feature-icon { font-size: 2rem; margin-bottom: 12px; display: block; }
.feature-card h3 { font-size: 1.2rem; margin-bottom: 8px; }
.feature-card p { color: var(--text-muted); font-size: 0.9rem; }

/* --- TESTIMONIALS --- */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-top: 32px;
}
.testimonial-card {
    background: var(--light-bg);
    padding: 24px;
    border-radius: var(--radius);
    border-left: 4px solid var(--primary);
}
.testimonial-card p { font-style: italic; margin-bottom: 10px; }
.testimonial-card .client { font-weight: 600; color: var(--primary); }

/* --- CONTACT --- */
.contact-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}
.contact-details {
    margin-top: 20px;
}
.contact-details li {
    font-size: 1rem;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.contact-details a {
    color: var(--primary);
    text-decoration: underline;
}
.contact-image img {
    border-radius: var(--radius);
    opacity: 0.9;
}

/* --- FOOTER --- */
.site-footer {
    background: #0F172A;
    color: #94A3B8;
    padding: 50px 0 20px;
}
.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 30px;
}
.footer-logo { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.footer-logo img { width: 34px; height: 34px; }
.footer-brand p { max-width: 280px; font-size: 0.9rem; }
.footer-links h4, .footer-contact h4 {
    font-family: 'Montserrat', sans-serif;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}
.footer-links ul, .footer-contact ul { display: flex; flex-direction: column; gap: 10px; }
.footer-links a, .footer-contact a {
    color: #94A3B8;
    transition: color var(--transition);
    font-size: 0.9rem;
}
.footer-links a:hover, .footer-contact a:hover { color: var(--primary); }
.footer-bottom {
    border-top: 1px solid #1E293B;
    padding-top: 20px;
    font-size: 0.8rem;
}

/* --- BACK TO TOP --- */
.back-to-top {
    position: fixed;
    bottom: 30px; right: 30px;
    width: 44px; height: 44px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    font-size: 1.5rem;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 4px 15px rgba(37,99,235,0.4);
    opacity: 0; visibility: hidden; transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 999;
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }

/* --- RESPONSIVE --- */
@media (max-width: 960px) {
    .footer-inner { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
    .contact-split { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .header-nav { display: none; }
    .hamburger { display: flex; margin-left: auto; }
    .mobile-nav { display: flex; }
    .header-inner { flex-wrap: wrap; height: auto; padding: 12px 0; }
    .header-search { order: 3; flex: 0 0 100%; max-width: 100%; }
}
@media (max-width: 480px) {
    .products-grid { grid-template-columns: 1fr 1fr; }
    .categories-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
    .hero-slider { height: 300px; }
    .search-hero-form { flex-direction: column; border-radius: 12px; }
    .search-hero-form input { border-radius: 12px 12px 0 0; border-right: 2px solid #E2E8F0; border-bottom: none; }
    .search-hero-form .btn { border-radius: 0 0 12px 12px; }
}