* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background-color: #f0f2f5;
    padding: 15px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: #ffffff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 20px;
}

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

label {
    display: block;
    font-weight: bold;
    color: #34495e;
    margin-bottom: 8px;
    margin-top: 10px;
}

input[type="text"], input[type="number"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #dcdcdc;
    border-radius: 5px;
    font-size: 16px;
}

input[readonly] {
    background-color: #f8f9fa;
    cursor: not-allowed;
}

.error {
    color: #e74c3c;
    font-size: 14px;
    margin-top: 5px;
}

.button-group {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

button {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: 5px;
    background-color: #3498db;
    color: #ffffff;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

button:hover {
    background-color: #2980b9;
}

.values-section {
    margin-bottom: 20px;
}

.equation-values {
    margin-bottom: 20px;
}

h3 {
    color: #2c3e50;
    margin-bottom: 10px;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.value-column {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

h4 {
    color: #34495e;
    font-size: 16px;
}

.graph-section {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

@media (max-width: 600px) {
    .container {
        padding: 15px;
    }

    .values-grid {
        grid-template-columns: 1fr;
    }

    .button-group {
        flex-direction: column;
        gap: 8px;
    }

    button {
        padding: 10px;
    }

    input[type="text"], input[type="number"] {
        font-size: 14px;
    }
}