@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600&display=swap');

body {
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #6200ea 0%, #481eaa 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    padding: 0 20px;
}

.calculator {
    background-color: #ffffff;
    padding: 50px 40px; /* Increased padding */
    border-radius: 20px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 500px; /* Increased max-width */
    text-align: center;
}

h1 {
    font-size: 2.2em; /* Slightly increased font size */
    margin-bottom: 20px;
    color: #333333;
}

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

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555555;
}

.charge-input {
    display: flex;
    gap: 10px;
    align-items: center;
}

input, .custom-select select {
    width: 100%;
    padding: 14px; /* Increased padding */
    border: 1px solid #dddddd;
    border-radius: 8px;
    font-size: 1em;
    color: #333333;
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
}

input:focus, .custom-select select:focus {
    border-color: #6200ea;
    box-shadow: 0 0 8px rgba(98, 0, 234, 0.2);
}

.custom-select {
    position: relative;
    width: 100%;
}

.custom-select select {
    cursor: pointer;
    appearance: none;
}

.custom-select::after {
    content: '';
    position: absolute;
    top: 50%;
    right: 10px;
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 6px solid #333333;
    transform: translateY(-50%);
    pointer-events: none;
}

button {
    background-color: #6200ea;
    color: white;
    border: none;
    padding: 15px;
    border-radius: 8px;
    font-size: 1.1em; /* Slightly increased font size */
    cursor: pointer;
    margin-top: 20px;
    width: 100%;
    transition: background-color 0.3s, transform 0.3s;
}

button:hover {
    background-color: #3700b3;
    transform: translateY(-2px);
}

button:active {
    background-color: #3700b3;
    transform: translateY(0);
}

input[readonly], #flux {
    background-color: #f7f7f7;
}