*  {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }

    body {
        background: radial-gradient(circle,rgb(194, 0, 13) 5%, rgba(0, 0, 0, 1) 100%);
        min-height: 100vh;
        display: flex;
        justify-content: center;
        align-items: center;
        padding: 20px;
        
    }
    .toggle {
        position: relative;
        display: inline-block;
        width: 60px;
        height: 34px;
    }
    .toggle input {
        opacity: 0;
        width: 0;
        height: 0;
    }
    .toggle-bottom {
    position: fixed;
    bottom: 20px; 
    right: 50%;
    transform: translateX(50%);
    z-index: 9999;
    }

    .slider {
        position: absolute;
        cursor: pointer;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: #ccc;
        transition: .4s;
        border-radius: 34px;
    }
    .slider:before {
        position: absolute;
        content: "";
        height: 26px;
        width: 26px;
        left: 4px;
        bottom: 4px;
        background-color: white;
        transition: .4s;
        border-radius: 50%;
    }
    input:checked + .slider {
        background-color: #ff0000;
    }
    input:checked + .slider:before {
        transform: translateX(26px);
    }
    
    
    .calculator {
        background-color: rgba(255, 255, 255, 0.95);
        border-radius: 15px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        width: 100%;
        max-width: 550px;
        padding: 30px;
        position: relative;
        overflow: hidden;
    }

    .calculator::before {
        content: '';
        background: #B81E28;
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 5px;
        
    }

    .header {
        text-align: center;
        margin-bottom: 25px;
    }

    .header h1 {
        color: #B81E28;
        font-size: 2.2rem;
        margin-bottom: 5px;
        text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
    }

    .header p {
        color: #666;
        font-size: 1rem;
    }

    .input-group {
        margin-bottom: 20px;
    }

    .input-group label {
        display: block;
        margin-bottom: 8px;
        font-weight: 600;
        color: #B81E28;
        text-align: center;
    }

    .input-group input {
        width: 100%;
        padding: 12px 15px;
        border: 2px solid #ddd;
        border-radius: 8px;
        font-size: 1rem;
        transition: border-color 0.3s;
        text-align: center;
    }

    .input-group input:focus {
        border-color: #B81E28;
        outline: none;
        box-shadow: 0 0 5px rgba(184, 30, 40, 0.3);
    }

    .currency-input {
        display: flex;
        gap: 10px;
    }

    .currency-input input {
        flex: 2;
    }

    .custom-select {
        position: relative;
        flex: 1;
        user-select: none;
    }

    .custom-select .selected {
        padding: 12px 15px;
        border: 2px solid #ddd;
        border-radius: 8px;
        background: #fff;
        cursor: pointer;
        font-size: 1rem;
        text-align: center;
        transition: border-color 0.3s;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
    }

    .custom-select .selected:hover {
        border-color: #B81E28;
    }

    .custom-select.open .selected {
        border-color: #B81E28;
        box-shadow: 0 0 5px rgba(184, 30, 40, 0.3);
    }

    .custom-select .arrow {
        width: 8px;
        height: 8px;
        border-left: 2px solid #B81E28;
        border-bottom: 2px solid #B81E28;
        transform: rotate(-45deg);
        transition: transform 0.2s ease, border-color 0.2s ease;
    }

    .custom-select.open .arrow {
        transform: rotate(135deg);
        border-color: #B81E28;
    }

    .custom-select .options {
        position: absolute;
        top: calc(100% + 5px);
        left: 0;
        width: 100%;
        background: white;
        border: 2px solid #B81E28;
        border-radius: 8px;
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        display: none;
        z-index: 10;
        overflow: hidden;
    }

    .custom-select.open .options {
        display: block;
        animation: fadeIn 0.15s ease-in-out;
    }

    @keyframes fadeIn {
        from { opacity: 0; transform: translateY(-5px); }
        to { opacity: 1; transform: translateY(0); }
    }

    .custom-select .options div {
        padding: 10px 15px;
        cursor: pointer;
        transition: background 0.2s, color 0.2s;
        text-align: center;
    }

    .custom-select .options div:hover {
        background: #B81E28;
        color: white;
    }

    .calculate-btn {
        background: #B81E28;
        color: white;
        border: none;
        border-radius: 8px;
        padding: 14px;
        width: 100%;
        font-size: 1.1rem;
        font-weight: 600;
        cursor: pointer;
        transition: transform 0.2s, box-shadow 0.2s;
        margin-top: 10px;
    }

    .calculate-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    }

    .calculate-btn:active {
        transform: translateY(0);
    }

    .results {
        margin-top: 30px;
        background-color: #f8f9fa;
        border-radius: 10px;
        padding: 20px;
        box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.05);
        display: none;
    }

    .results h2 {
        color: #B81E28;
        margin-bottom: 15px;
        text-align: center;
        font-size: 1.4rem;
    }

    .result-item {
        display: flex;
        justify-content: space-between;
        padding: 10px 0;
        border-bottom: 1px solid #eee;
    }

    .result-item:last-child {
        border-bottom: none;
    }

    .result-label {
        font-weight: 600;
        color: #333;
        text-align: center;
    }

    .result-value {
        font-weight: 700;
        color: #B81E28;
        text-align: center;
    }

    .footer {
        margin-top: 25px;
        text-align: center;
        color: #B81E28;
        font-style: italic;
        padding-top: 15px;
        border-top: 1px solid #eee;
        font-size: 20px;
    }

    .footer2 {
        margin-top: 10px;
        text-align: center;
        color: #363636;
        font-style: italic;
        padding-top: 15px;
        border-top: 1px solid #eee;
        font-size: 10px;
    }

    @media (max-width: 480px) {
        .calculator {
            padding: 20px;
        }

        .header h1 {
            font-size: 1.8rem;
        }

        .currency-input {
            flex-direction: column;
            text-align: center;
        }
    }