styles.css

body {
    font-family: 'Roboto', Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-image: url('images/janos-venczak-3HCYzSVQ5K4-unsplash.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

.stopwatch-container {
    background-color: rgba(255, 255, 255, 0.85);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    max-width: 450px;
    width: 100%;
}

.stopwatch-header {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 30px;
}

.stopwatch-header i {
    font-size: 42px;
    color: #3498db;
    margin-right: 20px;
}

.stopwatch-header h1 {
    font-size: 32px;
    color: #2c3e50;
    margin: 0;
    font-weight: 700;
}

.time-display {
    font-size: 56px;
    text-align: center;
    margin-bottom: 40px;
    color: #2c3e50;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
    letter-spacing: 2px;
}

.controls {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

button {
    padding: 15px 25px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 10px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

button:hover {
    background-color: #2980b9;
    transform: translateY(-3px);
    box-shadow: 0 6px 8px rgba(0,0,0,0.15);
}

button:disabled {
    background-color: #bdc3c7;
    color: #7f8c8d;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

.material-icons {
    font-size: 24px;
    margin-right: 10px;
}

.lap-times {
    max-height: 250px;
    overflow-y: auto;
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 10px;
    padding: 20px;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
}

.lap-times h3 {
    text-align: center;
    color: #2c3e50;
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 24px;
    font-weight: 600;
}

#lapList {
    list-style-type: none;
    padding: 0;
}

#lapList li {
    padding: 10px 0;
    border-bottom: 1px solid #ecf0f1;
    color: #34495e;
    font-size: 16px;
}

#lapList li:last-child {
    border-bottom: none;
}

@media (max-width: 480px) {
    .stopwatch-container {
        padding: 30px;
        margin: 20px;
    }

    .time-display {
        font-size: 48px;
    }

    .controls {
        grid-template-columns: 1fr;
    }

    .stopwatch-header i {
        font-size: 36px;
    }

    .stopwatch-header h1 {
        font-size: 28px;
    }
}