body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    overflow: hidden;
}

h2 {
    margin: 50px 0px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    color: #333;
}

.chrono {
    /* border: 1px solid black; */
    width: 250px;
    height: 250px;
    border-radius: 50%;
    position: relative;
    box-shadow: 0px 0px 50px #a5a4a4;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    text-align: center;
    outline: 2px solid #ccc;
}

/* dot in middle */
.chrono::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    background-color: black;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 3px solid red;
    z-index: 20;
}

/* deal with chronometer-hands */
.chrono .hands {
    width: 100%;
    height: 100%;
    position: absolute;
}

.chrono .min-hand {
    position: absolute;
    bottom: 50%;
    left: 50%;
    height: 25%;
    width: 5px;
    background-color: black;
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
    transform-origin: bottom;
}

.chrono .sec-hand {
    position: absolute;
    bottom: 50%;
    left: 50%;
    height: 35%;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 3px;
    background-color: black;
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
    transform-origin: bottom;
}

.chrono .ms-hand {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 70px;
    height: 30px;
    transform: translate(calc(-50% - 10px) , -50%);
    border: 1px solid #F44336;
    z-index: 80;
    display: flex;
    align-items: center;
    text-align: left;
    padding: 0px 2px;
    background-color: #f1f1f138;
}

.chrono .number {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    font-weight: bold;
    text-align: center;
    font-size: 15px;
    /* text-align: justify; */
    padding-top: 5px;
}

.chrono .number::before {
    content: '';
    position: absolute;
    top: 126px;
    left: 1px;
    background-color: black;
    height: 5px;
    width: 2px;
    /* text-align: center; */
    transform: rotate(90deg);
}

.chrono .number1 {
    --webkit-transform: rotate(30deg);
    transform: rotate(0deg);
}

.chrono .number1 {
    --webkit-transform: rotate(30deg);
    transform: rotate(30deg);
}

.chrono .number2 {
    --webkit-transform: rotate(60deg);
    transform: rotate(60deg);
}

.chrono .number3 {
    --webkit-transform: rotate(90deg);
    transform: rotate(90deg);
}

.chrono .number4 {
    transform: rotate(120deg);
}

.chrono .number5 {
    transform: rotate(150deg);
}

.chrono .number6 {
    transform: rotate(180deg);
}

.chrono .number7 {
    transform: rotate(210deg);
}

.chrono .number8 {
    transform: rotate(240deg);
}

.chrono .number9 {
    transform: rotate(270deg);
}

.chrono .number10 {
    transform: rotate(300deg);
}

.chrono .number11 {
    transform: rotate(330deg);
}

.chrono .number12 {
    transform: rotate(360deg);
}


button.ctrBtn {
    all: unset;
    padding: 15px;
    font-size: 15px;
    background-color: #F44336;
    box-shadow: 0px 0px 20px #f44336c4;
    color: #ffffff;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s linear;
    margin-top: 100px;
}

button.ctrBtn:hover {
    background-color: #af2218;
}

button.refreshBtn {
    all: unset;
    padding: 15px;
    font-size: 15px;
    color: #ffffff;
    background-color: #3F51B5;
    box-shadow: 0px 0px 20px #3f51b59d;
    border-radius: 50%;
    cursor: pointer;
    margin-right: 100px;
    transition: all 0.3s linear;
}

button.refreshBtn:hover {
    background-color: #283db8;
}