styles.css

body {
    font-family: 'Arial', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
 
    margin: 0;
    background: linear-gradient(45deg, #01507e, #04ffea); /* Radiant background */
}

.calculator {
    background: linear-gradient(145deg, #24ffbd, #3801017e); /* Subtle gradient for the calculator */
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0px 0px 15px rgba(0, 0, 0, 0.2);
}

#display {
    width: 100%;
    height: 50px;
    font-size: 24px;
    text-align: right;
    margin-bottom: 15px;
    padding-right: 10px;
    border: 1px solid #cccccc;
    border-radius: 10px;
    background-color: #c8fae6; /* Slightly lighter background */
}

.buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-gap: 10px;
}
button {
    width: 100%;
    padding: 15px; /* Reduced padding */
    font-size: 16px; /* Smaller font size */
    font-weight: bold;
    color: rgb(0, 2, 1);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    background: linear-gradient(145deg, #01374d83, #00f7ffe8), black; /* Radiant gradient for buttons */
    transition: transform 0.2s, background-color 0.3s;
}



button:hover {
    transform: scale(1.05);
}

button:active {
    transform: scale(0.95);
}

.zero {
    grid-column: span 2;
}
.history {
    display: none; /* Initially hidden */
    position: fixed; /* Fixed position to place it in the upper left corner */
    top: 10px; /* Distance from the top of the screen */
    left: 10px; /* Distance from the left side of the screen */
    padding: 1px;
    background: #f4f4f4;
    border-radius: 10px;
    max-width: 300px;
    max-height: 300px; /* Limit the height to make it scrollable */
    overflow-y: auto; /* Make history scrollable */
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000; /* Ensures it stays on top of other elements */
    border: 1px solid black;
   
}

.history h4 {
    margin: 0;
    text-align: center;
}

#history-list {
    list-style-type: none;
    padding: 0;
}

#history-list li {
    padding: 5px;
    border-bottom: 1px solid #000000;
    border: 3px solid #09615a;
    margin-top: 1px;
    display: flex;
    flex-direction: column;
}

#history-list li:last-child {
    border-bottom: none;
}

#toggle-history {
    margin-top: 10px;
    padding: 1px ;
    font-size: 16px;
    cursor: pointer;
    border: none;
    
    border-radius: 5px;
    background: #4CAF50; /* Green background */
    color: white;
    transition: background-color 0.3s;
}

#toggle-history:hover {
    background-color: #45a049;
    
}