/**
 * APT Intelligence Dashboard - Timeline Styles
 * 
 * Chronological timeline visualization for threat actors.
 * 
 * @version 1.0.0
 */

/* =========================================================================
   TIMELINE CONTAINER
   ========================================================================= */

.timeline-container {
    position: relative;
    padding: var(--space-lg) 0;
}

/* Central timeline line */
.timeline-container::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 120px;
    width: 2px;
    background: linear-gradient(
        to bottom,
        transparent,
        var(--color-border-primary) 5%,
        var(--color-border-primary) 95%,
        transparent
    );
}

/* =========================================================================
   TIMELINE YEAR MARKERS
   ========================================================================= */

.timeline-year {
    position: relative;
    margin-bottom: var(--space-xl);
}

.timeline-year-label {
    position: absolute;
    left: 0;
    top: 0;
    width: 100px;
    font-family: var(--font-mono);
    font-size: var(--text-xl);
    font-weight: 500;
    color: var(--color-accent-primary);
    text-align: right;
    padding-right: var(--space-md);
}

.timeline-year-marker {
    position: absolute;
    left: 114px;
    top: 4px;
    width: 14px;
    height: 14px;
    background: var(--color-bg-primary);
    border: 3px solid var(--color-accent-primary);
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(0, 255, 136, 0.3);
}

.timeline-year-content {
    margin-left: 150px;
    padding-top: var(--space-xs);
}

/* =========================================================================
   TIMELINE ITEMS
   ========================================================================= */

.timeline-items {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.timeline-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -36px;
    top: 50%;
    width: 30px;
    height: 2px;
    background: var(--color-border-primary);
}

.timeline-item::after {
    content: '';
    position: absolute;
    left: -42px;
    top: 50%;
    width: 8px;
    height: 8px;
    margin-top: -4px;
    background: var(--color-bg-tertiary);
    border: 2px solid var(--color-border-primary);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.timeline-item:hover {
    border-color: var(--color-accent-primary);
    background: var(--color-bg-tertiary);
    transform: translateX(4px);
}

.timeline-item:hover::after {
    background: var(--color-accent-primary);
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 8px rgba(0, 255, 136, 0.4);
}

/* Timeline Item Content */
.timeline-item-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border-secondary);
    border-radius: var(--radius-sm);
    font-size: var(--text-lg);
    flex-shrink: 0;
}

.timeline-item-content {
    flex: 1;
    min-width: 0;
}

.timeline-item-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-xs);
}

.timeline-item-name {
    font-family: var(--font-mono);
    font-size: var(--text-base);
    color: var(--color-text-primary);
    font-weight: 500;
}

.timeline-item-country {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    padding: 2px var(--space-sm);
    background: var(--color-bg-elevated);
    border-radius: var(--radius-sm);
}

.timeline-item-description {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.timeline-item-meta {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-sm);
}

.timeline-item-tag {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

/* =========================================================================
   REPORTS TIMELINE VIEW
   ========================================================================= */

.reports-timeline {
    position: relative;
    padding-left: 140px;
}

.reports-timeline::before {
    content: '';
    position: absolute;
    left: 120px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border-primary);
}

.reports-year-group {
    margin-bottom: var(--space-xl);
}

.reports-year-label {
    position: absolute;
    left: 0;
    width: 110px;
    font-family: var(--font-mono);
    font-size: var(--text-lg);
    color: var(--color-accent-secondary);
    text-align: right;
}

.reports-month-group {
    margin-bottom: var(--space-lg);
}

.reports-month-label {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-sm);
    padding-left: var(--space-lg);
}

/* =========================================================================
   REPORTS LIST VIEW
   ========================================================================= */

.reports-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.report-list-item {
    display: grid;
    grid-template-columns: 100px 1fr 150px 100px;
    gap: var(--space-md);
    align-items: center;
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.report-list-item:hover {
    border-color: var(--color-accent-primary);
    background: var(--color-bg-tertiary);
}

.report-list-date {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.report-list-title {
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.report-list-source {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-accent-secondary);
}

.report-list-actors {
    display: flex;
    gap: var(--space-xs);
}

.report-actor-chip {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    padding: 2px var(--space-sm);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-secondary);
    border-radius: var(--radius-sm);
    color: var(--color-accent-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.report-actor-chip:hover {
    background: var(--color-accent-primary);
    color: var(--color-bg-primary);
}

.report-list-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
}

.report-list-link:hover {
    background: var(--color-accent-secondary);
    border-color: var(--color-accent-secondary);
    color: var(--color-bg-primary);
    text-decoration: none;
}

/* =========================================================================
   STATISTICS VIEW
   ========================================================================= */

.statistics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-lg);
}

.stat-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
}

.stat-card-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border-secondary);
}

.stat-card-icon {
    font-size: var(--text-xl);
}

.stat-card-title {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    letter-spacing: 0.1em;
}

.stat-card-content {
    min-height: 200px;
}

/* Bar Chart */
.bar-chart {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.bar-chart-item {
    display: grid;
    grid-template-columns: 120px 1fr 60px;
    gap: var(--space-md);
    align-items: center;
}

.bar-chart-label {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.bar-chart-bar {
    height: 20px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.bar-chart-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
    border-radius: var(--radius-sm);
    transition: width var(--transition-normal);
}

.bar-chart-value {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    text-align: right;
}

/* Summary Stats */
.summary-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.summary-stat {
    text-align: center;
    padding: var(--space-lg);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
}

.summary-stat-value {
    font-family: var(--font-mono);
    font-size: var(--text-3xl);
    color: var(--color-accent-primary);
    margin-bottom: var(--space-xs);
}

.summary-stat-label {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    letter-spacing: 0.1em;
}

/* Year Distribution */
.year-distribution {
    display: flex;
    align-items: flex-end;
    gap: 4px;
    height: 150px;
    padding-top: var(--space-md);
}

.year-bar {
    flex: 1;
    background: var(--color-accent-primary);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    min-height: 4px;
    position: relative;
    cursor: pointer;
    transition: all var(--transition-fast);
    opacity: 0.7;
}

.year-bar:hover {
    opacity: 1;
    background: var(--color-accent-secondary);
}

.year-bar-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-text-primary);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
}

.year-bar:hover .year-bar-tooltip {
    opacity: 1;
    visibility: visible;
}

.year-labels {
    display: flex;
    justify-content: space-between;
    margin-top: var(--space-sm);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

/* =========================================================================
   EMPTY STATES
   ========================================================================= */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-2xl);
    text-align: center;
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: var(--space-lg);
    opacity: 0.3;
}

.empty-state-title {
    font-family: var(--font-mono);
    font-size: var(--text-lg);
    color: var(--color-text-primary);
    margin-bottom: var(--space-sm);
}

.empty-state-message {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    max-width: 400px;
}

/* =========================================================================
   LOADING STATES
   ========================================================================= */

.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-bg-tertiary) 25%,
        var(--color-bg-elevated) 50%,
        var(--color-bg-tertiary) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-card {
    height: 180px;
    border-radius: var(--radius-md);
}

.skeleton-text {
    height: 16px;
    margin-bottom: var(--space-sm);
}

.skeleton-text.short {
    width: 60%;
}

.skeleton-text.medium {
    width: 80%;
}