.perspective-1000 {
    perspective: 1000px;
}

.flashcard {
    min-height: 300px;
    width: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.5s;
    cursor: pointer;
}

.flashcard.is-flipped {
    transform: rotateY(180deg);
}

.flashcard-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    border-radius: 1rem;
    border: 4px solid var(--c-text);
    box-shadow: 4px 4px 0 0 var(--c-text);
}

.flashcard-front {
    background: var(--c-bg);
}

.fc-hint {
    position: absolute;
    bottom: 1rem;
    font-size: 0.75rem;
    opacity: 0.4;
    font-style: italic;
    text-align: center;
    width: 100%;
}

.flashcard-back {
    background: var(--c-accent);
    color: var(--c-bg);
    transform: rotateY(180deg);
    overflow-y: auto;
    flex-direction: column;
}

.fc-points {
    list-style: disc;
    padding-left: 1.5rem;
    text-align: left;
    width: 100%;
    margin: 0;
}

.fc-points li {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

.quiz-opt {
    box-shadow: 2px 2px 0 0 var(--c-text);
}

input:checked+.quiz-opt {
    box-shadow: inset 2px 2px 0 0 rgba(0, 0, 0, 0.2);
    transform: translate(2px, 2px);
}