/* =============================================
   Views CSS — Authors & Topics pages
   Shared styles for secondary views
   ============================================= */

/* --- View Controls --- */
.view-controls {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.view-sort {
    display: flex;
    flex-direction: column;
    gap: .3rem;
}

.view-count {
    font-size: .78rem;
    color: var(--on-surface-subtle);
    font-weight: 500;
}

/* --- Author List --- */
.view-list {
    display: flex;
    flex-direction: column;
    gap: .35rem;
}

.author-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: .85rem 1.1rem;
    background: var(--surface-container);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all .3s ease;
    border: 1px solid transparent;
}
.author-row:hover {
    background: var(--surface-container-high);
    border-color: var(--accent-border);
    transform: translateX(3px);
}

.author-rank {
    font-size: .65rem;
    font-weight: 800;
    color: var(--on-surface-subtle);
    min-width: 2rem;
    text-align: center;
}
.author-rank.top-3 {
    color: var(--primary);
}

.author-info {
    flex: 1;
    min-width: 0;
}

.author-name {
    font-size: .88rem;
    font-weight: 700;
    color: var(--on-surface);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.author-meta {
    font-size: .68rem;
    color: var(--on-surface-subtle);
    margin-top: .15rem;
}

.author-count {
    display: flex;
    align-items: center;
    gap: .35rem;
    padding: .3rem .7rem;
    background: var(--accent-bg);
    border-radius: 9999px;
    font-size: .72rem;
    font-weight: 700;
    color: var(--primary);
    white-space: nowrap;
}
.author-count .material-symbols-outlined {
    font-size: 14px;
}

/* Author detail (expanded) */
.author-papers {
    display: none;
    padding: .5rem 0 .5rem 3.1rem;
    flex-direction: column;
    gap: .25rem;
}
.author-papers.open {
    display: flex;
}

.author-paper-link {
    font-size: .78rem;
    color: var(--on-surface-variant);
    padding: .4rem .75rem;
    border-radius: var(--radius);
    transition: all var(--transition);
    display: flex;
    align-items: center;
    gap: .5rem;
    text-decoration: none;
}
.author-paper-link:hover {
    background: var(--surface-container-high);
    color: var(--on-surface);
}
.author-paper-link .material-symbols-outlined {
    font-size: 14px;
    color: var(--on-surface-subtle);
}
.author-paper-date {
    font-size: .62rem;
    color: var(--on-surface-subtle);
    margin-left: auto;
    white-space: nowrap;
}

/* --- Topics Grid --- */
.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: .75rem;
}

.topic-card {
    background: var(--surface-container);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.3rem;
    border: 1px solid transparent;
    transition: all .3s ease;
    cursor: pointer;
}
.topic-card:hover {
    border-color: var(--accent-border);
    background: var(--surface-container-high);
}
.topic-card.open {
    border-color: var(--accent-border-hover);
}

.topic-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
}

.topic-name {
    font-size: .95rem;
    font-weight: 700;
    color: var(--on-surface);
}

.topic-count {
    display: flex;
    align-items: center;
    gap: .3rem;
    padding: .25rem .65rem;
    background: var(--accent-bg);
    border-radius: 9999px;
    font-size: .72rem;
    font-weight: 700;
    color: var(--primary);
    white-space: nowrap;
}
.topic-count .material-symbols-outlined {
    font-size: 14px;
}

.topic-bar {
    margin-top: .75rem;
    height: 4px;
    background: var(--surface-container-high);
    border-radius: 2px;
    overflow: hidden;
}

.topic-bar-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 2px;
    transition: width .5s ease;
    opacity: .5;
}

.topic-chevron {
    color: var(--on-surface-subtle);
    transition: transform var(--transition);
    font-size: 18px !important;
}
.topic-card.open .topic-chevron {
    transform: rotate(180deg);
}

/* Topic papers list */
.topic-papers {
    display: none;
    flex-direction: column;
    gap: .2rem;
    margin-top: .75rem;
    padding-top: .75rem;
    border-top: 1px solid var(--ghost-border);
}
.topic-card.open .topic-papers {
    display: flex;
}

.topic-paper-item {
    font-size: .78rem;
    color: var(--on-surface-variant);
    padding: .4rem .5rem;
    border-radius: var(--radius);
    transition: all var(--transition);
    display: flex;
    gap: .5rem;
    align-items: flex-start;
}
.topic-paper-item:hover {
    background: var(--surface-container-high);
    color: var(--on-surface);
}
.topic-paper-item .material-symbols-outlined {
    font-size: 14px;
    color: var(--on-surface-subtle);
    margin-top: 2px;
    flex-shrink: 0;
}

.topic-paper-title {
    flex: 1;
    line-height: 1.35;
}

.topic-paper-authors {
    font-size: .65rem;
    color: var(--on-surface-subtle);
    margin-top: .15rem;
}

/* --- Empty state --- */
.view-empty {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--surface-container-low);
    border-radius: var(--radius-lg);
}
.view-empty .material-symbols-outlined {
    font-size: 48px;
    color: var(--on-surface-subtle);
    margin-bottom: 1rem;
}
.view-empty p {
    font-size: .9rem;
    color: var(--on-surface-subtle);
    margin: .25rem 0;
}
.view-empty a {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    margin-top: 1rem;
    padding: .6rem 1.2rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-container));
    color: var(--primary-on);
    font-weight: 700;
    font-size: .82rem;
    border-radius: var(--radius);
    transition: all var(--transition);
}
.view-empty a:hover {
    transform: translateY(-2px);
    filter: brightness(1.1);
    color: var(--primary-on);
}

/* --- Responsive --- */
@media (max-width: 767px) {
    .topics-grid {
        grid-template-columns: 1fr;
    }
    .view-controls {
        flex-direction: column;
        align-items: stretch;
    }
}