body {
    font-family: Arial, sans-serif;
    background: linear-gradient(to right, #667eea, #764ba2);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    background: white;
    padding: 25px;
    border-radius: 12px;
    width: 320px;
    text-align: center;
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
}

h1 {
    margin-bottom: 15px;
}

#display {
    font-size: 2.5em;
    margin: 20px 0;
    font-weight: bold;
}

.buttons button {
    padding: 10px 15px;
    margin: 5px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
}

.buttons button:hover {
    opacity: 0.8;
}

button:nth-child(1) { background: #28a745; color: white; }
button:nth-child(2) { background: #ffc107; }
button:nth-child(3) { background: #dc3545; color: white; }
button:nth-child(4) { background: #007bff; color: white; }

#laps {
    list-style: none;
    padding: 0;
    max-height: 120px;
    overflow-y: auto;
}

#laps li {
    background: #f1f1f1;
    margin: 5px 0;
    padding: 5px;
    border-radius: 5px;
}