body {
    background-color: #121212;
    color: white;
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
  }
  
  .calculator {
    position: absolute;  
    width: 320px;
    background-color: #1e1e1e;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
    overflow: hidden;
  }
  
  .display {
    background-color: #1a1a1a;
    color: #00e6e6;
    font-size: 2em;
    padding: 10px;
    border-radius: 10px;
    text-align: right;
    height: 50px;
    overflow: hidden;
    overflow-x: auto; 
    white-space: nowrap; 
    scrollbar-width: thin; 
    scrollbar-color: #00e6e6 #1a1a1a;
  }
  
  .buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    padding: 20px;
  }
  
  .button {
    background-color: #2c2c2c;
    color: white;
    font-size: 1.2rem;
    border-radius: 10px;
    padding: 15px;
    text-align: center;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    user-select: none;
  }
  
  .button:hover {
    background-color: #00e6e6;
    color: #121212;
  }
  
  .button:active {
    transform: scale(1.05);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.753);
  }
  
  .button.clear {
    background: #ff4d4d;
    color: #fff;
  }

  .button:hover {
    background-color: #00e6e6;
    color: #121212;
  }
  
  
  .button.equals {
    background: #ffffff;
    color: #000;
  }
  
  .history {
    grid-column: span 4;
    text-align: center;
    background-color: #121212;
    color: #00e6e6;
    padding: 10px;
    font-size: 1rem;
    cursor: pointer;
  }
  
  .history:hover {
    background-color: #00e6e6;
    color: #121212;
  }
  
  .history-list {
    background-color: #000000;
    color: white;
    padding: 10px;
    max-height: 70px;
    overflow-y: auto;
    border-top: 1px solid #00e6e6;
    scrollbar-width: thin;
    scrollbar-color: #00e6e6 #1a1a1a;
  }
  
  .history-list::-webkit-scrollbar {
    width: 6px;
  }
  
  .history-list::-webkit-scrollbar-track {
    background: #1a1a1a;
  }
  
  .history-list::-webkit-scrollbar-thumb {
    background: #00e6e6;
    border-radius: 10px;
  }
  
  .history-list::-webkit-scrollbar-thumb:hover {
    background: #00b3b3;
  }
  
  .history-item {
    margin-bottom: 5px;
    font-size: 1rem;
  }
  
  .hidden {
    display: none;
  }

/* Manual Button */
.button.manual {
    background-color: transparent;
    color: #00e6e6;
    font-size: 1rem;
    position: absolute;
    top: 20px;
    right: 10px;
    border: none;
    cursor: pointer;
    user-select: none;
    z-index: 9999;
    transition: color 0.3s ease;
}

.button.manual:hover {
    color: #ffcc00;
}

/* Modal Background (blurred effect behind the modal) */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5); /* Semi-transparent dark background */
    backdrop-filter: blur(20px); /* Blur effect for background */
    z-index: 999; /* Behind the modal */
    pointer-events: none; /* Allow clicks to pass through to the content behind */
    opacity: 0; /* Start with zero opacity */
    transition: opacity 0.3s ease, backdrop-filter 0.3s ease; /* Fade in/out and blur transition */
}

/* Modal Content (transparent background) */
.modal-content {
    padding: 20px;
    border-radius: 10px;
    width: 80%;
    max-width: 500px;
    color: #ffffff;
    font-size: 1.2rem;
    text-align: left;
    z-index: 1000;
    position: fixed; /* Fixed position to keep modal on top */
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%); /* Center the modal */
    display: none; /* Hidden by default */
    background: transparent; /* No background for content */
    border: none; /* No border */
    
}

/* Modal Heading */
.modal h2 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    font-weight: bold;
}


/* Modal Scrollable Content */
.modal-content p {
    overflow-y: auto;
    max-height: 300px;
    padding: 10px;
    scrollbar-width: thin;
    scrollbar-color: #000000 #6d6c6c;
}

/* For Webkit Browsers */
.modal-content::-webkit-scrollbar {
    width: 6px;
}

.modal-content::-webkit-scrollbar-thumb {
    background: #ffffff;
    border-radius: 10px;
}

.modal-content::-webkit-scrollbar-thumb:hover {
    background: #ffffff;
}



.bottom-strip {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 10px 0;
    font-family: Arial, sans-serif;
    font-size: 14px;
  }