body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-image: url(images/picture02.jpg);
    background-size: color;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 20px;
}

.stopwatch-container {
    max-width: 500px;
    width: 100%;
    background: none;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    text-align: center;
}

h1 {
    color: #333;
    margin-bottom: 30px;
}

.display {
    font-size: 64px;
    font-weight: bold;
    color: white;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
    margin: 30px 0;
    font-family: monospace;
    background: none;
    padding: 20px;
    border-radius: 15px;
}

.controls {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-bottom: 30px;
}

button {
    padding: 12px 30px;
    font-size: 16px;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 600;
    flex: 1;
    max-width: 120px;
}

button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.start-btn {
    background: #4CAF50;
    color: white;
}

.pause-btn {
    background: #ff9800;
    color: white;
}

.reset-btn {
    background: #f44336;
    color: white;
}

.lap-btn {
    background: #ff9800;
    color: white;
    max-width: 100%;
    margin-bottom: 20px;
}

.lap-section {
    margin-top: 20px;
    border-top: 2px solid #f0f0f0;
    padding-top: 20px;
}

.lap-list {
    max-height: 200px;
    overflow-y: auto;
    background: none;
    border-radius: 10px;
    padding: 15px;
}

.lap-list h3 {
    margin: 0 0 10px 0;
    color: white;
}

.lap-item {
    padding: 8px;
    border-bottom: 1px solid #e0e0e0;
    font-family: monospace;
    font-size: 16px;
    display: flex;
    justify-content: space-between;
}

.lap-item:last-child {
    border-bottom: none;
}

.lap-number {
    color: white;
    font-weight: bold;
}

.lap-time {
    color: white;
}