body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f4f4f9;
}

.flashcard-container {
    perspective: 1000px;
}

.flashcard {
    width: 300px;
    height: 300px;
    border: 2px solid #333;
    border-radius: 10px;
    background: #fff;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    transform-style: preserve-3d;
    transform: rotateY(0deg);
    transition: transform 0.6s;
}

.flashcard .front,
.flashcard .back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 10px;
    font-size: 18px;
    padding: 20px;
    box-sizing: border-box;
}

.flashcard .front {
    background-color: #007bff;
    color: white;
}

.flashcard .back {
    background-color: #f8f9fa;
    color: black;
    transform: rotateY(180deg);
}

.controls {
    margin-top: 20px;
    text-align: center;
}

.controls button {
    margin: 5px 10px;
    padding: 10px 20px;
    border: none;
    background-color: #007bff;
    color: white;
    font-size: 16px;
    border-radius: 5px;
    cursor: pointer;
}

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

.status-controls {
    margin-top: 10px;
    display: flex;
    justify-content: center;
    gap: 15px;
}

.checked-counter {
    text-align: center;
    font-weight: bold;
    margin-bottom: 8px;
    font-size: 1rem;
}

.svg-button {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 50px;
    height: 50px;
    background-color: #fff;
    border: 2px solid #ccc;
    border-radius: 50%;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: all 0.3s ease;
}

.svg-button:hover {
    background-color: #e0f7fa;
    border-color: #00796b;
}

.svg-button:active {
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

.svg-icon {
    width: 24px;
    height: 24px;
    fill: #00796b;
}

/* Style for notification */
#notification {
    display: none;
    background-color: yellow;
    padding: 10px;
    text-align: center;
    margin-bottom: 20px;
    /* Ensures some space between notification and flashcard */
    position: fixed;
    top: 20px;
    /* Positions it near the top of the page */
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    /* Makes sure it appears on top of other content */
    box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.1);
}