/* ここから */
body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f0f0f0;
    margin: 0;
}

.timer-container {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 300px; /* ある程度の幅を設定 */
}

h1 {
    color: #333;
    margin-bottom: 20px;
}

.display {
    font-size: 3em;
    font-weight: bold;
    color: #333;
    margin-bottom: 20px;
}

.controls button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 10px 15px;
    margin: 5px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    transition: background-color 0.2s;
}

.controls button:hover {
    background-color: #0056b3;
}

.controls button:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

.settings, .loop-settings, .notification-settings {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

input[type="number"] {
    width: 60px;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    text-align: center;
    font-size: 1em;
}

input[type="checkbox"] {
    transform: scale(1.2);
}

label {
    font-size: 0.9em;
    color: #555;
}
/* ここまで */