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

body {
    font-family: Arial, sans-serif;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px;
}

h1 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    margin-bottom: 20px;
    text-align: center;
}

.graph-container {
    width: 100%;
    max-width: 800px;
    aspect-ratio: 1;
    margin: 20px auto;
    position: relative;
}

canvas {
    width: 100%;
    height: 100%;
    border: 1px solid #ccc;
    border-radius: 8px;
}

.input-section {
    width: 100%;
    max-width: 600px;
    margin: 20px auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

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

input, select {
    padding: 12px;
    font-size: clamp(14px, 2vw, 16px);
    border: 1px solid #ccc;
    border-radius: 4px;
    flex: 1;
    min-width: 200px;
}

button {
    padding: 12px 24px;
    font-size: clamp(14px, 2vw, 16px);
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
    width: 100%;
}

button:hover {
    background-color: #45a049;
}

.alert {
    padding: 15px;
    margin: 15px 0;
    border-radius: 4px;
    display: none;
    width: 100%;
    text-align: center;
}

.success {
    background-color: #dff0d8;
    color: #3c763d;
    border: 1px solid #d6e9c6;
}

.error {
    background-color: #f2dede;
    color: #a94442;
    border: 1px solid #ebccd1;
}

.instructions {
    background-color: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    width: 100%;
}

.instructions h3 {
    margin-bottom: 10px;
    font-size: clamp(1.1rem, 3vw, 1.5rem);
}

.instructions p {
    margin: 10px 0;
    font-size: clamp(14px, 2vw, 16px);
    line-height: 1.5;
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    .graph-container {
        max-width: 100%;
    }

    .input-section {
        padding: 0 10px;
    }

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

    input, select, button {
        width: 100%;
        margin: 5px 0;
    }
}