/* ============================================
   ZeliKanban - Activity Log Styles
   ============================================ */

.activity-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

.activity-header {
    text-align: center;
    margin-bottom: 2rem;
}

.activity-header h1 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.activity-header .subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Filter Bar */
.filter-bar {
    background: var(--surface);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.filter-group {
    flex: 1;
    min-width: 200px;
}

.filter-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    font-weight: 500;
}

.filter-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    border: 1px solid var(--border);
    background: var(--background);
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.filter-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.filter-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.filter-btn[data-color] {
    position: relative;
}

.filter-btn[data-color]::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 6px;
    background: currentColor;
}

/* Date Filter */
.date-filter-group {
    flex: 2;
    min-width: 320px;
}

.date-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.date-nav-btn {
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--background);
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.date-nav-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.date-picker {
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--background);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    cursor: pointer;
    min-width: 140px;
}

.date-picker::-webkit-calendar-picker-indicator {
    filter: invert(0.5);
    cursor: pointer;
}

.date-picker:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

.clear-date-btn {
    margin-left: 0.5rem;
}

.clear-date-btn.active {
    background: var(--secondary);
    border-color: var(--secondary);
    color: white;
}

/* Today and All buttons */
.today-btn,
.all-btn {
    padding: 0.5rem 1rem;
    font-weight: 500;
}

.today-btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-color: var(--primary);
    color: white;
}

.today-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.all-btn {
    background: var(--surface);
    border-color: var(--border);
}

.all-btn.active {
    background: var(--text-secondary);
    border-color: var(--text-secondary);
    color: white;
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), var(--secondary));
    opacity: 0.3;
}

.timeline-item {
    position: relative;
    padding: 1rem 0 1rem 2rem;
    animation: fadeInUp 0.3s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -26px;
    top: 1.5rem;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--user-color, var(--primary));
    border: 3px solid var(--background);
    box-shadow: 0 0 0 2px var(--user-color, var(--primary));
}

.timeline-card {
    background: var(--surface);
    border-radius: 12px;
    padding: 1rem 1.25rem;
    transition: all 0.2s ease;
    border-left: 3px solid var(--user-color, var(--primary));
}

.timeline-card:hover {
    transform: translateX(4px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.timeline-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.user-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    color: white;
    background: var(--user-color, var(--primary));
}

.user-badge .avatar {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
}

.action-text {
    color: var(--text-primary);
    font-size: 0.95rem;
}

.action-text .action {
    font-weight: 600;
}

.action-text .target {
    color: var(--primary);
    font-weight: 500;
}

.action-text .details {
    color: var(--text-secondary);
}

.timeline-time {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-top: 0.5rem;
}

/* Action Icons */
.action-icon {
    font-size: 1.2rem;
    margin-right: 0.25rem;
}

.action-CREATE .action-icon::before {
    content: '➕';
}

.action-MOVE .action-icon::before {
    content: '↔️';
}

.action-COMPLETE .action-icon::before {
    content: '✅';
}

.action-UNCOMPLETE .action-icon::before {
    content: '⬜';
}

.action-DELETE .action-icon::before {
    content: '🗑️';
}

.action-UPDATE .action-icon::before {
    content: '✏️';
}

/* Load More */
.load-more-container {
    text-align: center;
    margin-top: 2rem;
}

#load-more-btn {
    padding: 0.75rem 2rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Loading */
.loading {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    .activity-container {
        padding: 1rem;
    }

    .filter-bar {
        flex-direction: column;
        gap: 1rem;
    }

    .timeline {
        padding-left: 20px;
    }

    .timeline::before {
        left: 4px;
    }

    .timeline-item {
        padding-left: 1.5rem;
    }

    .timeline-item::before {
        left: -20px;
        width: 10px;
        height: 10px;
    }
}