/* 作品集页面样式 - 民国期刊风格 */
#works-filter {
    max-width: 800px;
    margin: 2rem auto;
    padding: 1rem;
    background-color: var(--secondary-color);
    border: 1px solid var(--primary-color);
}

.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.filter-btn {
    padding: 0.5rem 1rem;
    background-color: var(--primary-color);
    color: var(--secondary-color);
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

.filter-btn:hover, .filter-btn.active {
    background-color: var(--accent-color);
}

#works-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
    padding: 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

.work-card {
    background-color: var(--secondary-color);
    border: 1px solid var(--primary-color);
    padding: 1rem;
    position: relative;
    height: 200px;
    perspective: 1000px;
}

.work-card-front, .work-card-back {
    position: absolute;
    width: 80%;
    height: 100%;
    backface-visibility: hidden;
    transition: transform 0.6s;
    padding: 1rem;
}

.work-card-front {
    transform: rotateY(0deg);
}

.work-card-back {
    transform: rotateY(180deg);
    overflow-y: auto;
}

.work-card.flipped .work-card-front {
    transform: rotateY(180deg);
}

.work-card.flipped .work-card-back {
    transform: rotateY(360deg);
}

.work-title {
    font-weight: bold;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.work-year {
    font-style: italic;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}