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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #fafafa;
    color: #333;
    padding: 20px;
    margin: 0;
}

nav {
    background-color: #333;
    padding: 10px 20px;
    margin-bottom: 20px;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: space-around;
    background: #333;
    padding: 10px;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
}

section {
    margin-bottom: 40px;
    padding: 20px;
    background: #fff;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1, h2 {
    margin-bottom: 15px;
    color: #333;
}

.diagram {
    text-align: center;
    margin-top: 20px;
}

.diagram svg {
    max-width: 100%;
    height: auto;
}

.caption {
    font-size: 0.9em;
    color: #666;
}

.illustration {
    display: block;
    margin: 20px auto;
    max-width: 80%;
    height: auto;
    border: 2px solid #ccc;
    border-radius: 5px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

#simulationArea {
    position: relative;
    width: 300px;
    height: 300px;
    margin: 20px auto;
    border: 2px dashed #ccc;
    border-radius: 50%;
}

.philosopher {
    position: absolute;
    width: 80px;
    height: 80px;
    border: 2px solid #333;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f4f4f4;
    text-align: center;
    transition: background-color 0.5s;
}

#phil0 {
    top: 15%;
    left: 70%;
    transform: translate(-50%, -50%);
}

#phil1 {
    top: 55%;
    left: 90%;
    transform: translate(-50%, -50%);
}

#phil2 {
    top: 90%;
    left: 50%;
    transform: translate(-50%, -50%);
}

#phil3 {
    top: 55%;
    left: 10%;
    transform: translate(-50%, -50%);
}

#phil4 {
    top: 15%;
    left: 30%;
    transform: translate(-50%, -50%);
}

.thinking {
    background-color: #d9edf7;
}

.hungry {
    background-color: #fcf8e3;
}

.eating {
    background-color: #dff0d8;
}

button {
    background-color: #007bff;
    color: #fff;
    border: none;
    padding: 10px 20px;
    font-size: 16px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

button:hover {
    background-color: #0056b3;
    transform: scale(1.05);
}

button:active {
    background-color: #003f7f;
    transform: scale(0.95);
}

select {
    padding: 8px 12px;
    font-size: 16px;
    border: 1px solid #ccc;
    border-radius: 5px;
    cursor: pointer;
    transition: border-color 0.3s;
}

select:hover {
    border-color: #007bff;
}

footer {
    text-align: center;
    margin-top: 20px;
    color: #777;
}

@media (max-width: 600px) {
    nav ul {
        flex-direction: column;
        text-align: center;
    }
    .philosopher {
        width: 100%;
        margin: 5px 0;
    }
}

@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
        align-items: center;
    }

    #simulationArea {
        flex-direction: column;
        align-items: center;
    }
}