.activity-section {
    padding: 3.5rem 0 2rem;
    position: relative;
    z-index: 2;
}

.activity-header {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    margin-bottom: 2rem;
}

@media (min-width: 992px) {
    .activity-header {
        flex-direction: row;
        align-items: flex-end;
        justify-content: space-between;
    }
}

.activity-title {
    font-size: 1.85rem;
    font-weight: 800;
    margin-bottom: 0.35rem;
    letter-spacing: -0.5px;
}

.activity-subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 0;
    max-width: 520px;
}

.activity-filters-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
}

.activity-filter-pills {
    display: inline-flex;
    background: var(--surface-base);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 3px;
    gap: 2px;
    backdrop-filter: blur(8px);
}

.filter-pill-btn {
    border: none;
    background: transparent;
    color: var(--text-muted);
    padding: 6px 12px;
    font-size: 0.82rem;
    font-weight: 600;
    border-radius: 6px;
    transition: var(--transition);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.filter-pill-btn:hover {
    color: var(--text-main);
    background: var(--surface-hover);
}

.filter-pill-btn.active {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 2px 10px var(--primary-glow);
}

.filter-pill-btn.active.filter-pill-gold {
    background: #eab308;
    color: #080706;
    box-shadow: 0 2px 10px rgba(234, 179, 8, 0.3);
}

.activity-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.25rem;
}

@media (max-width: 576px) {
    .activity-grid {
        grid-template-columns: 1fr;
        gap: 0.9rem;
    }
}

.event-card {
    background: var(--surface-base);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow-sm);
}

.event-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(249, 115, 22, 0.35), transparent);
    opacity: 0;
    transition: var(--transition);
}

.event-card:hover {
    transform: translateY(-3px);
    border-color: rgba(249, 115, 22, 0.35);
    box-shadow: var(--shadow-md), 0 0 20px rgba(249, 115, 22, 0.12);
}

.event-card:hover::before {
    opacity: 1;
}

.event-card.first-victor-card {
    border-color: rgba(251, 191, 36, 0.35);
    background: linear-gradient(180deg, rgba(251, 191, 36, 0.05) 0%, var(--surface-base) 100%);
}

.event-card.first-victor-card::before {
    background: linear-gradient(90deg, transparent, rgba(251, 191, 36, 0.7), transparent);
    opacity: 1;
}

.event-card.first-victor-card:hover {
    border-color: rgba(251, 191, 36, 0.6);
    box-shadow: var(--shadow-md), 0 0 25px rgba(251, 191, 36, 0.18);
}

.event-top-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    margin-bottom: 0.85rem;
}

.event-user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 0;
    flex: 1;
}

.event-user-avatar {
    width: 28px;
    height: 28px;
    object-fit: contain;
    border-radius: 4px;
    flex-shrink: 0;
}

.event-user-name {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-main);
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: var(--transition);
}

.event-user-name:hover {
    color: var(--primary);
}

.event-time-badge {
    font-size: 0.76rem;
    color: var(--text-dim);
    white-space: nowrap;
    flex-shrink: 0;
}

.event-badges-row {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-wrap: wrap;
    margin-bottom: 0.85rem;
}

.device-badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.72rem;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.device-badge-pill.pc {
    background: rgba(59, 130, 246, 0.15);
    color: #60a5fa;
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.device-badge-pill.mobile {
    background: rgba(249, 115, 22, 0.15);
    color: #fb923c;
    border: 1px solid rgba(249, 115, 22, 0.3);
}

.crown-badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.72rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 4px;
    background: rgba(251, 191, 36, 0.18);
    color: #fde047;
    border: 1px solid rgba(251, 191, 36, 0.4);
}

.city-badge-pill {
    font-size: 0.72rem;
    color: var(--text-dim);
    background: var(--surface-1);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid var(--border-subtle);
}

.event-level-body {
    display: flex;
    gap: 0.85rem;
    align-items: center;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 0.65rem;
    margin-bottom: 0.85rem;
    transition: var(--transition);
}

.event-level-body:hover {
    background: rgba(0, 0, 0, 0.4);
    border-color: var(--border-strong);
}

.event-level-thumb-box {
    position: relative;
    width: 96px;
    height: 54px;
    flex-shrink: 0;
    border-radius: 6px;
    overflow: hidden;
    background: #111;
}

.event-level-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: var(--transition);
}

.event-level-body:hover .event-level-thumb {
    transform: scale(1.05);
}

.event-level-rank-overlay {
    position: absolute;
    top: 3px;
    left: 3px;
    background: rgba(0, 0, 0, 0.75);
    color: var(--accent);
    font-size: 0.7rem;
    font-weight: 800;
    padding: 1px 5px;
    border-radius: 4px;
    backdrop-filter: blur(4px);
    line-height: 1.2;
}

.event-level-details {
    min-width: 0;
    flex: 1;
}

.event-level-name {
    display: block;
    font-size: 0.98rem;
    font-weight: 700;
    color: var(--text-main);
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: var(--transition);
}

.event-level-name:hover {
    color: var(--primary);
}

.event-level-creator {
    font-size: 0.78rem;
    color: var(--text-dim);
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.event-progress-wrap {
    margin-top: 3px;
}

.progress-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8rem;
    font-weight: 800;
    padding: 2px 8px;
    border-radius: 4px;
}

.progress-tag.completion {
    background: rgba(34, 197, 94, 0.16);
    color: #4ade80;
    border: 1px solid rgba(34, 197, 94, 0.35);
}

.progress-tag.record {
    background: rgba(249, 115, 22, 0.16);
    color: #fb923c;
    border: 1px solid rgba(249, 115, 22, 0.35);
}

.event-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    padding-top: 0.4rem;
    border-top: 1px solid var(--border-subtle);
    font-size: 0.8rem;
}

.event-stats {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    flex-wrap: wrap;
}

.event-stat-item {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--text-muted);
}

.event-stat-item.enjoyment {
    color: var(--accent);
    font-weight: 600;
}

.event-video-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 6px;
    background: rgba(239, 68, 68, 0.12);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.25);
    text-decoration: none;
    transition: var(--transition);
    flex-shrink: 0;
}

.event-video-btn:hover {
    background: #ef4444;
    color: #fff;
    border-color: #ef4444;
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.4);
    transform: scale(1.08);
}

.activity-loading,
.activity-empty {
    text-align: center;
    padding: 3rem 1rem;
    background: var(--surface-base);
    border: 1px dashed var(--border-subtle);
    border-radius: var(--radius);
    color: var(--text-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.activity-empty i {
    font-size: 2.2rem;
    opacity: 0.4;
}

.activity-more-wrap {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
}

.activity-more-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: var(--surface-base);
    border: 1px solid var(--border-strong);
    color: var(--text-main);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.activity-more-btn:hover:not(:disabled) {
    background: var(--surface-hover);
    border-color: var(--primary);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(249, 115, 22, 0.15);
}

.activity-more-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}