body {
    background: var(--body-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    user-select: none;
    height: 100vh;
    width: 100vw;
    margin: 0;
    padding: 0;
}
.num {
    width: 190px;
    height: 190px;
    line-height: 190px;
    font-size: 90px;
    transition: background 0.1s,
    opacity 0.1s,
    top 3s,
    left 3s,
    transform 0.1s cubic-bezier(0, 0.66, 0, 1.64);
}
.num:hover {
    background: var(--n-hoverbg);
    transform: scale(1.1);
}
.num:active {
    transform: scale(0.9);
}
.bod {
    position: relative;
    width: 400px;
    height: 400px;
    border-radius: 20px;
    padding: 20px;
    background: var(--bod-bg);
    border: 5px solid var(--bod-bd);
    display: flex;
    justify-content: center;
    margin-bottom: 7px;
    flex-wrap: wrap;
}
.maths {
    width: 400px;
    height: 100px;
    border-radius: 20px;
    padding: 20px;
    background: var(--bod-bg);
    border: 5px solid var(--bod-bd);
    display: flex;
}
.ms {
    width: 100px;
    height: 100px;
    line-height: 100px;
    font-size: 50px;
    transition: all 0.2s cubic-bezier(0, 0.66, 0, 1.64);
}
.ms:hover {
    transform: scale(1.2);
}
.ms:active {
    transform: scale(0.8);
}
.tools {
    width: 400px;
    height: 50px;
    border-radius: 20px;
    padding: 20px;
    background: var(--bod-bg);
    border: 5px solid var(--bod-bd);
    display: flex;
    margin-top: 7px;
}
.tos {
    height: 50px;
    line-height: 50px;
    font-size: 30px;
    transition: all 0.2s cubic-bezier(0, 0.66, 0, 1.64);
}
.b {
    width: 117px;
    transition: transform 0.2s cubic-bezier(0, 0.66, 0, 1.64);
}
.b:hover {
    transform: scale(1.2);
}
.b:active {
    transform: scale(0.8);
}
.pts {
    width: 49px;
}
.tip {
    display: none;
    width: 100%;
    height: auto;
    background: var(--tip-bg);
    position: absolute;
    opacity: 0;
    bottom: 0;
    font-size: 40px;
    color: var(--tip-txtclr);
    transition: all 0.2s;
    text-align: center;
}
.a-s {
    background: var(--as-bg);
    border-radius: 10px;
    border: 5px solid var(--as-bd);
    font-weight: 600;
    color: var(--as-txtclr);
    text-align: center;
}
.logo {
    background-image: url("./logo.svg");
    height: 15px;
    width: 15px;
    border-radius: 2px;
    background-size: cover;
}
.inf {
    position: absolute;
    top: 0;
    left: 16px;
    font-size: 15px;
    margin: 0;
}