body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
    background: #f5f5f7;
}

.app {
    max-width: 420px;
    margin: auto;
    padding: 20px;
    text-align: center;
}

h1 {
    margin-top: 30px;
    font-size: 20px;
    color: #666;
}

#mainBtn {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    border: none;
    font-size: 18px;
    font-weight: bold;
    color: white;
    background: #34c759;
    margin: 30px auto;
    display: block;
}

#mainBtn.out {
    background: #ff3b30;
}

.manual {
    margin-top: 10px;
}

.manual input {
    padding: 8px;
    border-radius: 8px;
    border: 1px solid #ccc;
}

.manual button {
    margin-left: 8px;
    padding: 8px 10px;
    border-radius: 8px;
    border: none;
    background: #007aff;
    color: white;
}

.actions {
    margin-top: 15px;
}

.actions button {
    margin: 5px;
    padding: 8px 12px;
    border-radius: 8px;
    border: none;
    background: #007aff;
    color: white;
}

#history {
    margin-top: 25px;
    text-align: left;
}

.row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid #ddd;
}

.date {
    width: 110px;
    font-weight: bold;
}

.time {
    cursor: pointer;
    padding: 4px 6px;
    border-radius: 6px;
}

.time:hover {
    background: #e5e5ea;
}

.time input {
    width: 80px;
    border: none;
    background: transparent;
    font-size: 14px;
}