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

body {
    font-family: Arial, sans-serif;
    background: #0f172a;
    min-height: 100vh;

    display: flex;
    justify-content: center;
    align-items: center;
}

.stopwatch-container {
    background: #1e293b;
    padding: 40px;
    width: 90%;
    max-width: 500px;
    text-align: center;
    border-radius: 15px;

    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

h1 {
    margin-bottom: 30px;
    color: white;
}

#display {
    font-size: 50px;
    font-weight: bold;
    margin-bottom: 30px;
    color: white;
}

button {
    padding: 12px 20px;
    margin: 5px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    color: white;
}

button:hover {
    opacity: 0.9;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}


#startBtn {
    background: #22c55e;
}



#pauseBtn {
    background: #f97316;
}



#lapBtn {
    background: #3b82f6;
}



#resetBtn {
    background: #ef4444;
}

h2 {
    color: white;
    margin-top: 30px;
}

#laps {
    list-style: none;
    margin-top: 20px;
}

#laps li {
    padding: 12px 15px;
    margin: 8px 0;

    background: #334155;
    color: white;

    border-radius: 8px;

    font-size: 16px;
    font-weight: 500;

    text-align: left;

    border-left: 4px solid #3b82f6;
}
@media (max-width: 600px) {

    .stopwatch-container {
        width: 90%;
        padding: 25px 15px;
    }

    #display {
        font-size: 40px;
    }

    button {
        padding: 10px 15px;
        font-size: 14px;
    }
}