body {
    font-family: 'Roboto', sans-serif;
    background-color: #e6f0fa;
    color: #000000;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    background-color: #ffffff;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    padding: 40px;
    max-width: 600px;
    width: 90%;
    margin: 20px;
}

h1 {
    color: #1e90ff;
    text-align: center;
    margin-bottom: 30px;
    font-size: 2.5em;
    font-weight: 700;
}

.input-group {
    margin-bottom: 25px;
}

label {
    display: block;
    font-weight: 700;
    margin-bottom: 8px;
    color: #000000;
}

input {
    width: 100%;
    padding: 15px;
    border: 2px solid #1e90ff;
    border-radius: 10px;
    font-size: 1.2em;
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
}

input:focus {
    border-color: #005bb5;
    box-shadow: 0 0 8px rgba(30, 144, 255, 0.3);
}

.input-desc {
    font-size: 0.9em;
    color: #555555;
    margin-top: 5px;
}

.button-group {
    display: flex;
    gap: 15px;
}

button {
    flex: 1;
    padding: 15px;
    background-color: #1e90ff;
    color: #ffffff;
    border: none;
    border-radius: 10px;
    font-size: 1.2em;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #005bb5;
}

#resetBtn {
    background-color: #000000;
}

#resetBtn:hover {
    background-color: #333333;
}

.result {
    margin-top: 30px;
    padding: 25px;
    background-color: #1e90ff;
    color: #ffffff;
    border-radius: 10px;
    text-align: center;
}

.result h2 {
    font-size: 1.8em;
    margin-bottom: 15px;
}

.result p {
    font-size: 1.4em;
    font-weight: 700;
}

.hidden {
    display: none;
}

.history-section {
    margin-top: 40px;
}

.history-section h2 {
    color: #1e90ff;
    font-size: 1.6em;
    margin-bottom: 15px;
}

.history-section ul {
    list-style-type: none;
    padding: 0;
}

.history-section li {
    background-color: #f5f6fa;
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 8px;
    font-size: 1em;
    color: #000000;
}

.motivational {
    margin-top: 40px;
    text-align: center;
}

.motivational h2 {
    font-size: 1.8em;
    font-weight: 700;
    color: #000000;
    background-color: #e6f0fa;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

@media (max-width: 600px) {
    .container {
        padding: 20px;
    }

    h1 {
        font-size: 2em;
    }

    .button-group {
        flex-direction: column;
    }

    input {
        font-size: 1em;
    }
}