body, html {
    height: 100%;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #f4f4f9;
    font-family: Arial, sans-serif;
    transition: background-color 0.3s ease;
}

body.dark-mode {
    background-color: #121212;
    color: #ffffff;
}

.container {
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh; /* Full viewport height */
    width: 100vw; /* Full viewport width */
    background-color: #fff;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
    transition: background-color 0.3s ease;
}

.container.dark-mode {
    background-color: #1e1e1e;
    color: #ffffff;
}

#clock {
    margin-bottom: 20px;
    font-family: 'Antonio', sans-serif;
    font-weight: 600;
    font-size: 24vw; /* Scale font size based on viewport width */
}

#clock.no-hours {
    font-size: 36vw; /* Increased font size when hours are not shown */
}

.bottom-panel {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 20px;
}

.input-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.input-container label {
    margin-right: 5px;
}

.input-container input {
    width: 50px;
    padding: 5px;
    border: 1px solid #ccc;
    border-radius: 5px;
    transition: border-color 0.3s ease;
}

.input-container input:focus {
    border-color: #007bff;
}

#startStopButton, #pauseButton, #fullscreenButton, #darkModeButton {
    padding: 10px 20px;
    font-size: 1em;
    cursor: pointer;
    background-color: #007bff;
    color: #fff;
    border: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

#startStopButton:hover, #pauseButton:hover, #fullscreenButton:hover, #darkModeButton:hover {
    background-color: #0056b3;
}

#startStopButton:active, #pauseButton:active, #fullscreenButton:active, #darkModeButton:active {
    background-color: #004085;
}

#startStopButton.dark-mode, #pauseButton.dark-mode, #fullscreenButton.dark-mode, #darkModeButton.dark-mode {
    background-color: #4CAF50;
}

#startStopButton.dark-mode:hover, #pauseButton.dark-mode:hover, #fullscreenButton.dark-mode:hover, #darkModeButton.dark-mode:hover {
    background-color: #45a049;
}

#startStopButton.dark-mode:active, #pauseButton.dark-mode:active, #fullscreenButton.dark-mode:active, #darkModeButton.dark-mode:active {
    background-color: #388e3c;
}