/* ==================================
   CSS Reset & Variables
==================================== */
:root {
    /* Colors - Deep Navy & Premium White Theme */
    --clr-navy: #0F172A;
    --clr-navy-light: #1E293B;
    --clr-accent: #3B82F6;
    --clr-white: #FFFFFF;
    --clr-offwhite: #F8FAFC;
    --clr-gray: #64748B;
    --clr-gray-light: #E2E8F0;
    --clr-text: #334155;
    --clr-whatsapp: #25D366;
    --clr-wechat: #07C160;

    /* Fonts */
    --font-heading: 'Manrope', sans-serif;
    --font-body: 'Inter', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--clr-text);
    background-color: var(--clr-white);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--clr-navy);
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.3s ease;
}

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-padding {
    padding: 80px 0;
}

.bg-light {
    background-color: var(--clr-offwhite);
}

.bg-navy {
    background-color: var(--clr-navy);
    color: var(--clr-white);
}
.bg-navy h2 {
    color: var(--clr-white);
}

.text-center {
    text-align: center;
}
.mt-4 {
    margin-top: 1.5rem;
}

/* ==================================
   Header & Navigation
==================================== */
#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: box-shadow 0.3s ease;
}

#header.scrolled {
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--clr-navy);
}

.desktop-nav a {
    margin-left: 30px;
    font-weight: 500;
    font-size: 0.95rem;
}
.desktop-nav a:hover {
    color: var(--clr-accent);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--clr-navy);
    cursor: pointer;
}

.mobile-nav {
    display: none;
    background: var(--clr-white);
    padding: 20px;
    border-top: 1px solid var(--clr-gray-light);
}

.mobile-nav.active {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

@media (max-width: 768px) {
    .desktop-nav { display: none; }
    .mobile-menu-btn { display: block; }
}

/* ==================================
   Hero Section
==================================== */
#hero {
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    background: url('../images/hero/hero-bg.jpg') no-repeat center center/cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.85); /* Navy overlay */
}

.hero-content {
    position: relative;
    z-index: 2;
    color: var(--clr-white);
}

.hero-title {
    font-size: clamp(3rem, 5vw, 5rem);
    font-weight: 800;
    letter-spacing: 2px;
    margin-bottom: 15px;
    color: var(--clr-white);
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    font-weight: 300;
    letter-spacing: 1.5px;
    margin-bottom: 25px;
    color: var(--clr-gray-light);
}

.hero-tagline {
    font-size: 1rem;
    font-weight: 500;
    color: var(--clr-white);
    margin-bottom: 40px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: 0.3s ease;
}

.btn-primary {
    background-color: var(--clr-white);
    color: var(--clr-navy);
    border: 2px solid var(--clr-white);
}
.btn-primary:hover {
    background-color: transparent;
    color: var(--clr-white);
}

.btn-outline {
    background-color: transparent;
    color: var(--clr-white);
    border: 2px solid var(--clr-white);
    margin-left: 15px;
}
.btn-outline:hover {
    background-color: var(--clr-white);
    color: var(--clr-navy);
}

.hero-cta { display: flex; justify-content: center; gap: 15px; flex-wrap: wrap; }
.hero-cta .btn { margin: 0; }

/* ==================================
   Sister Concern Ticker
==================================== */
#ticker {
    background-color: var(--clr-navy-light);
    color: var(--clr-gray-light);
    padding: 15px 0;
    overflow: hidden;
    border-bottom: 1px solid var(--clr-navy);
}

.ticker-wrap {
    width: 100%;
    overflow: hidden;
    white-space: nowrap;
}

.ticker-content {
    display: inline-block;
    padding-left: 100%;
    animation: ticker 35s linear infinite;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
}

.ticker-content:hover {
    animation-play-state: paused;
}

.ticker-content span { font-weight: 500; }
.ticker-content .dot { margin: 0 30px; color: var(--clr-gray); }

@keyframes ticker {
    0% { transform: translate3d(0, 0, 0); }
    100% { transform: translate3d(-100%, 0, 0); }
}

/* ==================================
   About Section
==================================== */
.about-text {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--clr-navy);
}

/* ==================================
   Product Showcase
==================================== */
.section-title {
    font-size: 2.2rem;
    margin-bottom: 50px;
    text-align: center;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background: var(--clr-white);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--clr-gray-light);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

.product-img-wrap {
    position: relative;
    height: 240px;
    overflow: hidden;
    background: var(--clr-offwhite);
    cursor: pointer;
}

.product-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-img-wrap img {
    transform: scale(1.05);
}

.img-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(15, 23, 42, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    color: var(--clr-white);
    font-size: 1.5rem;
}

.product-card:hover .img-overlay {
    opacity: 1;
}

.product-info {
    padding: 25px;
}

.product-info h3 {
    font-size: 1.25rem;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--clr-gray-light);
}

.sub-products {
    color: var(--clr-gray);
    font-size: 0.9rem;
}

.sub-products li {
    margin-bottom: 6px;
    position: relative;
    padding-left: 15px;
}

.sub-products li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--clr-accent);
}

.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 10px;
}

.lace-details { display: none; }
.desktop-lace-list { display: grid; }

@media (max-width: 992px) {
    .product-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .product-grid { grid-template-columns: 1fr; }
    .lace-details { display: block; }
    .desktop-lace-list { display: none; }
    
    details summary {
        cursor: pointer;
        font-weight: 500;
        color: var(--clr-navy);
        outline: none;
        margin-bottom: 15px;
    }
}

/* ==================================
   Contact Section
==================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-card {
    background: var(--clr-offwhite);
    padding: 40px;
    border-radius: 8px;
    border: 1px solid var(--clr-gray-light);
}

.contact-card h3 {
    font-size: 1.4rem;
    margin-bottom: 20px;
    color: var(--clr-accent);
}

.company-name {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 10px;
}

.address {
    font-size: 1rem;
    color: var(--clr-gray);
    margin-bottom: 30px;
    display: flex;
    gap: 10px;
}

.address i {
    color: var(--clr-accent);
    margin-top: 4px;
}

.primary-contact h5 {
    font-size: 1.1rem;
}

.designation {
    font-size: 0.85rem;
    color: var(--clr-gray);
    margin-bottom: 15px;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
    color: var(--clr-navy);
    font-size: 1.05rem;
}

.contact-link i { width: 20px; color: var(--clr-gray); }
.contact-link:hover { color: var(--clr-accent); }
.contact-link.whatsapp:hover { color: var(--clr-whatsapp); }

/* WeChat Box */
.wechat-box {
    margin-top: 25px;
    padding: 15px;
    background: var(--clr-white);
    border: 1px solid var(--clr-gray-light);
    border-radius: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.wechat-info { display: flex; align-items: center; gap: 15px; }
.wechat-info i { font-size: 2rem; color: var(--clr-wechat); }
.wechat-label { font-size: 0.8rem; color: var(--clr-gray); }
.wechat-id { font-weight: 700; color: var(--clr-navy); }

.btn-wechat-qr {
    background: transparent;
    border: 1px solid var(--clr-gray-light);
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-family: var(--font-body);
    font-weight: 500;
    transition: 0.3s;
}
.btn-wechat-qr:hover { background: var(--clr-offwhite); color: var(--clr-wechat); }

@media (max-width: 768px) {
    .contact-grid { grid-template-columns: 1fr; }
    .contact-card { padding: 25px; }
    
    /* Updated Mobile WeChat Box */
    .wechat-box { 
        flex-direction: row; 
        align-items: center; 
        justify-content: space-between;
        gap: 10px;
        padding: 12px;
    }
    .wechat-info { gap: 10px; }
    .wechat-info i { font-size: 1.6rem; }
    .btn-wechat-qr { padding: 6px 10px; font-size: 0.85rem; }
}

/* ==================================
   Final CTA & Footer
==================================== */
.final-cta h2 { font-size: 1.8rem; margin-bottom: 10px; }
.final-cta p { color: var(--clr-gray-light); margin-bottom: 30px; }
.cta-buttons { display: flex; justify-content: center; gap: 15px; flex-wrap: wrap; }
.btn-outline-light { border: 1px solid var(--clr-white); color: var(--clr-white); padding: 12px 25px; border-radius: 4px; }
.btn-outline-light:hover { background: var(--clr-white); color: var(--clr-navy); }

footer { padding: 30px 0; border-top: 1px solid var(--clr-gray-light); }
.footer-logo { font-family: var(--font-heading); font-weight: 800; color: var(--clr-navy); font-size: 1.2rem; display: block; margin-bottom: 10px; }
.footer-copyright { font-size: 0.85rem; color: var(--clr-gray); }

/* ==================================
   Mobile Sticky Bottom Bar
==================================== */
.mobile-bottom-bar {
    position: fixed;
    bottom: 0; left: 0; width: 100%;
    background: var(--clr-white);
    display: none;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
    z-index: 999;
}

.bottom-action {
    flex: 1;
    text-align: center;
    padding: 15px 0;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--clr-navy);
    border-right: 1px solid var(--clr-gray-light);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}
.bottom-action:last-child { border-right: none; }
.bottom-action i { font-size: 1.2rem; color: var(--clr-gray); }
.bottom-action.whatsapp i { color: var(--clr-whatsapp); }

@media (max-width: 768px) {
    .mobile-bottom-bar { display: flex; }
    body { padding-bottom: 65px; } /* Prevent footer hide */
}

/* ==================================
   Lightbox (Image & QR)
==================================== */
.lightbox-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(15, 23, 42, 0.95);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.lightbox-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.lightbox-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    text-align: center;
}

#lightboxImg {
    max-width: 100%;
    max-height: 80vh;
    border-radius: 4px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.close-btn {
    position: absolute;
    top: -40px; right: -10px;
    background: none; border: none;
    color: var(--clr-white);
    font-size: 2rem;
    cursor: pointer;
}

#lightboxCaption {
    color: var(--clr-white);
    margin-top: 15px;
    font-size: 1rem;
    letter-spacing: 1px;
}
.hidden { display: none !important; }



/* ==================================
   Logo & Social Media Styles
==================================== */
/* Header Logo */
.logo img {
    max-height: 50px; /* লোগো বেশি বড়/ছোট লাগলে এই সাইজটি পরিবর্তন করবেন */
    width: auto;
    display: block;
}

/* Footer Logo */
.footer-logo img {
    max-height: 50px;
    width: auto;
    margin: 0 auto 15px auto;
    display: block;
}

/* Social Media Icons */
.social-links {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--clr-offwhite);
    color: var(--clr-navy);
    border-radius: 50%;
    font-size: 1.2rem;
    border: 1px solid var(--clr-gray-light);
    transition: all 0.3s ease;
}

.social-links a:hover {
    background-color: var(--clr-accent);
    color: var(--clr-white);
    border-color: var(--clr-accent);
    transform: translateY(-3px); /* হোভার করলে হালকা উপরে উঠবে */
}