body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 600px;
    margin: auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

th, td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: center;
}

th {
    background-color: #4CAF50;
    color: white;
}

.add-runner {
    text-align: center;
    margin: 20px 0;
}

.add-runner input {
    margin: 5px;
    padding: 10px;
    width: calc(50% - 22px);
}

.timer {
    text-align: center;
}

#display {
    font-size: 2em;
    margin: 10px 0;
}