:root {
    --primary: #0c7257;
    --primary-light: #27ae60;
    --accent: #e65100;
    --bg-light: #f4f9f5;
    --text-dark: #2c3e50;
    --white: #ffffff;
}

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

body {
    font-family: 'Hind Siliguri', sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Top Bar */
.top-announcement {
    background-color: var(--primary);
    color: var(--white);
    text-align: center;
    padding: 8px 10px;
    font-size: 0.95rem;
    font-weight: 600;
}

/* Header & Sticky Nav */
header {
    background: var(--white);
    box-shadow: 0 4px 15px rgba(0,0,0,0.06);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 10px 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.brand a {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.brand img {
    height: 55px;
    width: auto;
}

.brand-text h1 {
    font-size: 1.3rem;
    color: var(--primary);
    font-weight: 700;
    line-height: 1.2;
}

.brand-text p {
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 600;
}

.nav-contact {
    display: flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, #25d366 0%, #075e54 100%);
    color: var(--white);
    padding: 10px 20px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    font-size: 0.95rem;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.75) 0%, rgba(12, 114, 87, 0.8) 100%), url('../img/odc3.png') no-repeat center center / cover;
    padding: 80px 0;
    text-align: center;
    color: var(--white);
}

.hero-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.sub-header-text {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.9;
}

.order-btn-trigger {
    background: var(--accent);
    color: var(--white);
    font-size: 1.2rem;
    font-weight: 700;
    padding: 12px 35px;
    border-radius: 50px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: 0.3s;
}

.order-btn-trigger:hover {
    transform: translateY(-2px);
    background: #bf4300;
}

/* Products Section */
.products-section {
    padding: 60px 0;
}

.section-heading {
    text-align: center;
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 40px;
    font-weight: 700;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.product-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.04);
    position: relative;
    border: 1px solid #eef5f1;
    display: flex;
    flex-direction: column;
}

.product-card .badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--accent);
    color: var(--white);
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 4px;
    z-index: 10;
}

.product-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.product-info {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.product-info h3 {
    font-size: 1.2rem;
    color: #1e272e;
    margin-bottom: 8px;
}

.product-info .desc {
    font-size: 0.9rem;
    color: #7f8c8d;
    margin-bottom: 15px;
    flex-grow: 1;
}

.price-tag {
    margin-bottom: 15px;
}

.price-tag .old-p {
    text-decoration: line-through;
    color: #95a5a6;
    margin-right: 8px;
}

.price-tag .new-p {
    font-size: 1.4rem;
    color: #d32f2f;
    font-weight: 700;
}

.buy-now-btn {
    background: #e8f5e9;
    color: var(--primary);
    text-align: center;
    padding: 10px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 700;
    transition: 0.3s;
    border: 1px solid #c8e6c9;
}

.buy-now-btn:hover {
    background: var(--primary);
    color: var(--white);
}

/* Why Choose Us & Grid */
.why-us-section {
    padding: 50px 0;
    background: #edf5f0;
}

.why-us-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    align-items: center;
}

.features-list {
    list-style: none;
}

.features-list li {
    background: var(--white);
    padding: 12px 18px;
    margin-bottom: 10px;
    border-radius: 8px;
    display: flex;
    gap: 12px;
    align-items: center;
    font-weight: 500;
}

.features-list li i {
    color: var(--primary-light);
    font-size: 1.2rem;
}

.why-gallery-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.why-img-item img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}

/* Checkout Section */
.checkout-section {
    padding: 60px 0;
}

.checkout-wrapper {
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    overflow: hidden;
    border: 1px solid #e2e8f0;
}

.checkout-title-bar {
    background: var(--primary);
    color: var(--white);
    padding: 15px;
    text-align: center;
    font-size: 1.2rem;
    font-weight: 600;
}

.checkout-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
}

.billing-details-pane {
    padding: 30px;
    border-right: 1px solid #edf2f7;
}

.order-review-pane {
    padding: 30px;
    background: #fafafa;
}

.pane-heading {
    font-size: 1.2rem;
    color: var(--primary);
    margin-bottom: 15px;
    font-weight: 700;
}

.form-row {
    margin-bottom: 15px;
}

.form-row label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    font-size: 0.95rem;
}

.form-row input, .form-row textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font-family: inherit;
}

.form-row input:focus, .form-row textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.woo-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.woo-table th, .woo-table td {
    padding: 10px 0;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

.woo-table th {
    color: #7f8c8d;
    font-weight: 500;
}

.woo-table td {
    text-align: right;
    font-weight: 600;
}

.woo-table tr th:first-child, .woo-table tr td:first-child {
    text-align: left;
}

.woo-table tr.total-row th, .woo-table tr.total-row td {
    font-weight: 700;
    color: var(--accent);
    font-size: 1.15rem;
    border-bottom: none;
}

.payment-box {
    background: #fff3cd;
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-size: 0.9rem;
    border: 1px solid #ffeeba;
    color: #856404;
}

.final-submit-btn {
    background: var(--accent);
    color: var(--white);
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 6px;
    font-size: 1.2rem;
    font-weight: 700;
    cursor: pointer;
    transition: 0.3s;
}

.final-submit-btn:hover {
    background: #bf4300;
}

/* Footer */
footer {
    background: #1e272e;
    color: #ced6e0;
    padding: 25px 0;
    text-align: center;
    font-size: 0.9rem;
}

/* --- মোবাইল রেসপন্সিভ মিডিয়া কোয়েরি --- */
@media (max-width: 850px) {
    .header-container {
        padding: 0 10px;
    }
    
    header {
        padding: 8px 0;
    }

    .brand img {
        height: 42px; /* ছোট স্ক্রিনে লোগো পারফেক্ট রাখার জন্য */
    }

    .brand-text h1 {
        font-size: 1.1rem;
    }

    .brand-text p {
        font-size: 0.75rem;
    }

    .nav-contact {
        padding: 8px 12px;
        font-size: 0.8rem;
    }

    .hero-section h2 {
        font-size: 1.8rem;
    }

    .sub-header-text {
        font-size: 1rem;
    }

    .why-us-grid, .checkout-grid {
        grid-template-columns: 1fr; /* ল্যাপটপ গ্রিড ভেঙে মোবাইলে উপর-নিচ হবে */
    }

    .billing-details-pane, .order-review-pane {
        padding: 20px;
    }

    .billing-details-pane {
        border-right: none;
        border-bottom: 1px solid #edf2f7;
    }
}