:root {
    --primary: #4f46e5;
    --dark: #0f172a;
    --text: #475569;
    --white: #ffffff;
}

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

/* হেডার ফিক্সড রাখার জন্য */
.main-header {
    background: var(--white);
    height: 75px;
    width: 100%;
    position: sticky;
    top: 0;
    left: 0;
    z-index: 9999;
    border-bottom: 1px solid #e2e8f0;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    display: flex;
    align-items: center;
}

.header-container {
    width: 95%;
    max-width: 1300px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* লোগো সেকশন */
.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo img {
    height: 40px;
    width: auto;
    display: block;
}

.logo-text {
    font-size: 24px;
    font-weight: 800;
    color: var(--dark);
    letter-spacing: -1px;
}

.logo-text span {
    color: var(--primary);
}

/* মেনু ডিজাইন */
.main-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.menu-link {
    text-decoration: none;
    color: var(--text);
    font-weight: 600;
    font-size: 15px;
    padding: 10px 0;
    transition: 0.3s;
}

.menu-link:hover {
    color: var(--primary);
}

/* ড্রপডাউন ঠিক করা */
.has-dropdown {
    position: relative;
}

.dropdown-box {
    position: absolute;
    top: 75px;
    /* হেডারের ঠিক নিচে */
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: var(--white);
    width: 650px;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transition: 0.3s ease;
    border: 1px solid #f1f5f9;
}

.has-dropdown:hover .dropdown-box {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.mega-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.mega-col h3 {
    font-size: 13px;
    color: var(--primary);
    margin-bottom: 12px;
    text-transform: uppercase;
}

.mega-col ul {
    list-style: none;
}

.mega-col ul li a {
    display: block;
    padding: 6px 0;
    text-decoration: none;
    color: var(--dark);
    font-size: 14px;
    transition: 0.2s;
}

.mega-col ul li a:hover {
    color: var(--primary);
    padding-left: 5px;
}

/* রাইট সাইড */
.header-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.search-wrapper {
    background: #f1f5f9;
    padding: 8px 15px;
    border-radius: 8px;
    display: flex;
    align-items: center;
}

.search-wrapper input {
    border: none;
    background: none;
    outline: none;
    width: 120px;
    font-size: 14px;
}

.mobile-open {
    display: none;
    font-size: 22px;
    cursor: pointer;
    border: none;
    background: none;
}

/* মোবাইল রেসপন্সিভ */
@media (max-width: 992px) {
    .main-menu {
        display: none;
    }

    .mobile-open {
        display: block;
    }

    .dropdown-box {
        width: 95vw;
        left: 2.5vw;
        transform: none;
    }

    .search-wrapper {
        display: none;
    }
}