body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
.header-with-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background-color: #f9f9f9;
    border-bottom: 1px solid #ddd;
}

.header-with-logo .logo {
    height: 60px; /* Adjust logo size */
    margin-right: 15px;
    border-radius: 8px; /* Optional rounded edges */
}

.header-with-logo h1 {
    color: #333;
    font-size: 1.8em;
    margin: 0;
}

@media (max-width: 768px) {
    .header-with-logo {
        flex-direction: column;
        text-align: center;
    }

    .header-with-logo .logo {
        margin: 0 0 10px 0; /* Center the logo */
    }

    .header-with-logo h1 {
        font-size: 1.5em;
    }
}

h1 {
    text-align: center;
    margin: 20px 0;
    color: #333;
}

.section {
    margin: 20px;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 8px;
    background-color: #f9f9f9;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.section h2 {
    margin-bottom: 15px;
    color: #555;
}

/* QR Code Generator */
#qr-input {
    width: 100%;
    max-width: 300px;
    padding: 10px;
    margin-bottom: 10px;
}

button {
    padding: 10px 15px;
    margin: 5px 0;
    border: none;
    border-radius: 5px;
    background-color: #007bff;
    color: #fff;
    cursor: pointer;
}

button:hover {
    background-color: #0056b3;
}

#qr-code {
    display: block;
    margin: 10px auto;
}

/* Text to URL Converter */
#text-to-url, #converted-url {
    width: 100%;
    max-width: 300px;
    padding: 10px;
    margin-bottom: 10px;
}

/* Scientific Calculator */
.calculator {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    max-width: 400px;
    margin: 0 auto;
}

.calculator input {
    grid-column: span 4;
    padding: 10px;
    font-size: 1.2em;
    text-align: right;
}

.calculator button {
    padding: 15px;
    font-size: 1em;
}

/* Bengali Calendar */
#calendar {
    text-align: center;
}

#calendar-display {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 5px;
    margin: 20px 0;
}

#calendar-display h3 {
    grid-column: span 7;
    margin-bottom: 10px;
}

#calendar-display .calendar-grid {
    display: contents;
}

#calendar-display div {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    background-color: #f1f1f1;
}

#calendar-display .today {
    background-color: #007bff;
    color: #fff;
    font-weight: bold;
}

@media (max-width: 768px) {
    #calendar-display {
        grid-template-columns: repeat(4, 1fr);
    }

    .calculator {
        grid-template-columns: repeat(3, 1fr);
    }

    .calculator button {
        padding: 10px;
        font-size: 0.9em;
    }
}

@media (max-width: 480px) {
    #calendar-display {
        grid-template-columns: repeat(2, 1fr);
    }

    .calculator {
        grid-template-columns: repeat(2, 1fr);
    }

    button {
        padding: 8px 10px;
        font-size: 0.8em;
    }
}