body {
    font-family: 'Arial', sans-serif;
    text-align: center;
    background: linear-gradient(135deg, #1e1e1e, #343434);
    color: white;
}

.container {
    max-width: 600px;
    margin: auto;
}

.tabs {
    display: flex;
    justify-content: space-around;
    background: #333;
    padding: 10px;
    border-radius: 10px;
}

.tab-link {
    background: none;
    border: none;
    color: white;
    font-size: 16px;
    padding: 10px 20px;
    cursor: pointer;
    transition: 0.3s;
}

.tab-link.active, .tab-link:hover {
    background: #ADFF2F;
    color: black;
    border-radius: 5px;
}

.tab-content {
    display: none;
    background: #222;
    padding: 20px;
    border-radius: 10px;
    margin-top: 20px;
    box-shadow: 0px 4px 10px rgba(0, 255, 128, 0.5);
}

.active-tab {
    display: block;
}

.result, .timer, .current-time {
    font-size: 70px;
    font-weight: bold;
    margin-top: 10px;
}

button {
    margin-top: 10px;
    padding: 12px;
    font-size: 24px;
    cursor: pointer;
    background: linear-gradient(90deg, #ADFF2F, #32CD32);
    border: none;
    border-radius: 5px;
    color: black;
    font-weight: bold;
}

button:hover {
    background: linear-gradient(90deg, #7ACC29, #228B22);
}

.button-container {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 10px;
}