body {
    margin: 0;
     font-family: 'Poppins', sans-serif; /* এই লাইনটি চেঞ্জ করুন */
    background-color: var(--bg-dark);
    color: var(--text-main);
    padding-bottom: 80px; /* Space for bottom nav */
    overflow-x: hidden;
}

/* Background Blobs for 3D effect */
.background-blobs {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: -1;
    background: radial-gradient(circle at 10% 20%, rgba(188, 19, 254, 0.2), transparent 40%),
                radial-gradient(circle at 90% 80%, rgba(0, 242, 255, 0.15), transparent 40%);
}

.hidden { display: none !important; }

main { padding: 20px; max-width: 600px; margin: 0 auto; }

/* Grid Systems */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }

/* Typography */
h1, h2, h3, h4 { margin: 0; font-weight: 600; }
.label { font-size: 0.8rem; text-transform: uppercase; color: var(--text-muted); letter-spacing: 1px; }

/* Inputs */
input {
    width: 100%;
    padding: 12px;
    margin: 8px 0 16px;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: white;
    box-sizing: border-box;
}

.cta-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(45deg, var(--primary), var(--accent));
    border: none;
    border-radius: 8px;
    color: white;
    font-weight: bold;
    font-size: 1rem;
    cursor: pointer;
    box-shadow: 0 0 20px rgba(188, 19, 254, 0.4);
}

/* Navigation */
.nav-item {
    color: var(--text-muted);
    font-size: 1.4rem;
    text-decoration: none;
    transition: 0.3s;
}
.nav-item.active {
    color: var(--primary);
    text-shadow: 0 0 10px var(--primary);
    transform: translateY(-5px);
}

/* Sidebar */
.sidebar {
    position: fixed;
    left: -280px;
    top: 0;
    width: 280px;
    height: 100%;
    z-index: 200;
    transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
}
.sidebar.open { left: 0; }
.sidebar ul { list-style: none; padding: 20px; }
.sidebar li a {
    display: block;
    padding: 15px;
    color: white;
    text-decoration: none;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

/* Colors */
.text-red { color: #ff4757; }
.text-blue { color: #2ed573; }
.text-green { color: #ffa502; }
.text-purple { color: #5352ed; }

/* Sections */
.section { display: none; animation: fadeIn 0.5s; }
.active-section { display: block; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Ad Container */
.ad-container {
    width: 100%;
    height: 60px;
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    border-radius: 8px;
    border: 1px dashed #333;
    color: #555;
    font-size: 0.8rem;
}

/* Pulse Animation for Heart Icon */
.fa-heartbeat {
    animation: heartbeat 1.5s infinite;
}

@keyframes heartbeat {
    0% { transform: scale(1); }
    15% { transform: scale(1.3); }
    30% { transform: scale(1); }
    45% { transform: scale(1.15); }
    60% { transform: scale(1); }
}