/*==================== GOOGLE FONTS ====================*/
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css');

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

html {
    scroll-behavior: smooth;
}

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

ul { list-style: none; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/*==================== BUTTONS ====================*/
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.4);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.6);
}

.btn-outline {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

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

/*==================== NAVBAR ====================*/
.navbar {
    height: 80px;
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px); /* আধুনিক ব্লার ইফেক্ট */
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo { 
    font-size: 1.8rem; 
    font-weight: 700; 
    letter-spacing: -1px;
}
.logo span { color: var(--primary-color); }

.navbar-menu {
    display: flex;
    gap: 40px;
    align-items: center;
}

.navbar-menu li a {
    font-weight: 500;
    color: var(--title-color);
    transition: var(--transition);
    position: relative;
}

.navbar-menu li a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.navbar-menu li a:hover::after {
    width: 100%;
}

.navbar-menu li a:hover { color: var(--primary-color); }

/*==================== HERO SECTION ====================*/
.hero-section {
    padding: 150px 0 100px;
    text-align: center;
    background: radial-gradient(circle at top right, #eef2ff, transparent),
                radial-gradient(circle at bottom left, #f5f3ff, transparent);
    background-color: var(--section-bg);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    animation: fadeInUp 1s ease;
}

.hero-section h1 {
    font-size: 4rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--title-color);
    font-weight: 800;
}

.hero-section p {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    color: var(--text-muted);
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 20px;
}

/*==================== ANIMATIONS ====================*/
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/*==================== RESPONSIVE (Mobile) ====================*/
@media (max-width: 768px) {
    .navbar-menu {
        display: none; /* মোবাইলে মেনু হাইড রাখা হয়েছে (JS দিয়ে টগল করতে হবে) */
    }
    
    .hero-section h1 {
        font-size: 2.5rem;
    }
    
    .hero-section p {
        font-size: 1.1rem;
    }

    .hero-btns {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
}