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

body {
    background: #f4f4f4;
    font-family: sans-serif;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}


img {
    position: absolute;
    top: 10px;
    left: 20px;
}

.container {
    width: 320px;
    background: white;
    border: 3px solid black;
    padding: 20px;
}

h1 {
    text-align: center;
    border: 3px solid black;
    padding: 10px;
    margin-bottom: 15px;
}

.row {
    border: 2px solid black;
    padding: 10px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

input {
    width: 70px;
    padding: 5px;
    border: 2px solid black;
}

#timer {
    text-align: center;
    font-size: 2rem;
    border: 3px solid black;
    padding: 15px;
    margin: 10px 0;
}

.buttons {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 10px;
}

button {
    flex: 1;
    padding: 10px;
    border: 2px solid black;
    cursor: pointer;
}

#mode #sessions {
    border: 2px solid black;
    padding: 8px;
    text-align: center;
    margin-top: 8px;
}