/**
 * Activity Timeline Component
 * Reusable, configuration-driven timeline visualization
 * Supports visual modes: compact, enriched, summary
 */

/* ============================================
   CSS VARIABLES (with fallbacks)
   ============================================ */
.activity-timeline {
    --timeline-bg: var(--bg-card, #1a1a1a);
    --timeline-border: var(--border-color, #333);
    --timeline-bg-secondary: var(--bg-secondary, #252525);
    --timeline-bg-elevated: var(--bg-elevated, #2a2a2a);
    --timeline-text-primary: var(--text-primary, #fff);
    --timeline-text-secondary: var(--text-secondary, #888);
    --timeline-text-dim: var(--text-dim, #666);
    --timeline-accent: var(--accent-cyan, #4a9eff);
    --timeline-status-new: var(--signal-new, #3b82f6);
    --timeline-status-baseline: var(--signal-baseline, #6b7280);
    --timeline-status-burst: var(--signal-burst, #f59e0b);
    --timeline-status-flagged: var(--signal-emergency, #ef4444);
    --timeline-status-gone: var(--text-dim, #666);
}

/* ============================================
   TIMELINE CONTAINER
   ============================================ */
.activity-timeline {
    background: var(--timeline-bg);
    border: 1px solid var(--timeline-border);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 11px;
}

.activity-timeline.collapsed .activity-timeline-body {
    display: none;
}

.activity-timeline.collapsed .activity-timeline-header {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 10px;
}

.activity-timeline.collapsed .activity-timeline-collapse-icon {
    transform: rotate(-90deg);
}

/* ============================================
   HEADER
   ============================================ */
.activity-timeline-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    cursor: pointer;
    user-select: none;
    transition: background 0.15s ease;
}

.activity-timeline-header:hover {
    background: rgba(255, 255, 255, 0.02);
}

.activity-timeline-collapse-icon {
    margin-right: 8px;
    font-size: 10px;
    transition: transform 0.2s ease;
    color: var(--timeline-text-dim);
}

.activity-timeline-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--timeline-text-secondary);
}

.activity-timeline-header-stats {
    display: flex;
    gap: 12px;
    font-size: 10px;
    color: var(--timeline-text-dim);
}

.activity-timeline-header-stat {
    display: flex;
    align-items: center;
    gap: 4px;
}

.activity-timeline-header-stat .stat-value {
    color: var(--timeline-text-primary);
    font-weight: 500;
}

/* ============================================
   BODY
   ============================================ */
.activity-timeline-body {
    padding: 0 12px 12px 12px;
    border-top: 1px solid var(--timeline-border);
}

/* ============================================
   CONTROLS
   ============================================ */
.activity-timeline-controls {
    display: flex;
    gap: 6px;
    align-items: center;
    padding: 8px 0;
    flex-wrap: wrap;
}

.activity-timeline-btn {
    background: var(--timeline-bg-secondary);
    border: 1px solid var(--timeline-border);
    color: var(--timeline-text-secondary);
    font-size: 9px;
    padding: 4px 8px;
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: inherit;
}

.activity-timeline-btn:hover {
    background: var(--timeline-bg-elevated);
    color: var(--timeline-text-primary);
}

.activity-timeline-btn.active {
    background: var(--timeline-accent);
    color: var(--text-inverse);
    border-color: var(--timeline-accent);
}

.activity-timeline-window {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 9px;
    color: var(--timeline-text-dim);
    margin-left: auto;
}

.activity-timeline-window-select {
    background: var(--timeline-bg-secondary);
    border: 1px solid var(--timeline-border);
    color: var(--timeline-text-primary);
    font-size: 9px;
    padding: 3px 6px;
    border-radius: 3px;
    font-family: inherit;
}

/* ============================================
   TIME AXIS
   ============================================ */
.activity-timeline-axis {
    display: flex;
    justify-content: space-between;
    padding: 0 50px 0 140px;
    margin-bottom: 6px;
    font-size: 9px;
    color: var(--timeline-text-dim);
}

.activity-timeline-axis-label {
    position: relative;
}

.activity-timeline-axis-label::before {
    content: '';
    position: absolute;
    top: -4px;
    left: 50%;
    width: 1px;
    height: 4px;
    background: var(--timeline-border);
}

/* ============================================
   LANES CONTAINER
   ============================================ */
.activity-timeline-lanes {
    display: flex;
    flex-direction: column;
    gap: 3px;
    max-height: 180px;
    overflow-y: auto;
    margin-top: 6px;
}

.activity-timeline-lanes::-webkit-scrollbar {
    width: 6px;
}

.activity-timeline-lanes::-webkit-scrollbar-track {
    background: var(--timeline-bg-secondary);
    border-radius: 3px;
}

.activity-timeline-lanes::-webkit-scrollbar-thumb {
    background: var(--timeline-border);
    border-radius: 3px;
}

.activity-timeline-lanes::-webkit-scrollbar-thumb:hover {
    background: var(--timeline-text-dim);
}

/* ============================================
   INDIVIDUAL LANE
   ============================================ */
.activity-timeline-lane {
    display: flex;
    align-items: stretch;
    min-height: 32px;
    background: var(--timeline-bg-secondary);
    border-radius: 3px;
    overflow: hidden;
    cursor: pointer;
    transition: background 0.15s ease;
}

.activity-timeline-lane:hover {
    background: var(--timeline-bg-elevated);
}

.activity-timeline-lane.expanded {
    min-height: auto;
}

.activity-timeline-lane.baseline {
    opacity: 0.5;
}

.activity-timeline-lane.baseline:hover {
    opacity: 0.8;
}

/* Status indicator strip */
.activity-timeline-status {
    width: 4px;
    min-width: 4px;
    flex-shrink: 0;
}

.activity-timeline-status[data-status="new"] {
    background: var(--timeline-status-new);
}

.activity-timeline-status[data-status="baseline"] {
    background: var(--timeline-status-baseline);
}

.activity-timeline-status[data-status="burst"] {
    background: var(--timeline-status-burst);
}

.activity-timeline-status[data-status="flagged"] {
    background: var(--timeline-status-flagged);
}

.activity-timeline-status[data-status="gone"] {
    background: var(--timeline-status-gone);
}

/* Label section */
.activity-timeline-label {
    width: 130px;
    min-width: 130px;
    padding: 6px 8px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 1px;
    border-right: 1px solid var(--timeline-border);
    overflow: hidden;
}

.activity-timeline-id {
    color: var(--timeline-text-primary);
    font-size: 11px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.2;
}

.activity-timeline-name {
    color: var(--timeline-text-dim);
    font-size: 9px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.2;
}

/* ============================================
   TRACK (where bars are drawn)
   ============================================ */
.activity-timeline-track {
    flex: 1;
    position: relative;
    height: 100%;
    min-height: 32px;
    padding: 4px 8px;
}

.activity-timeline-track-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
}

/* ============================================
   SIGNAL BARS
   ============================================ */
.activity-timeline-bar {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    height: 14px;
    min-width: 2px;
    border-radius: 2px;
    transition: opacity 0.15s ease;
}

/* Strength variants */
.activity-timeline-bar[data-strength="1"] { height: 5px; }
.activity-timeline-bar[data-strength="2"] { height: 9px; }
.activity-timeline-bar[data-strength="3"] { height: 13px; }
.activity-timeline-bar[data-strength="4"] { height: 17px; }
.activity-timeline-bar[data-strength="5"] { height: 21px; }

/* Status colors */
.activity-timeline-bar[data-status="new"],
.activity-timeline-bar[data-status="repeated"] {
    background: var(--timeline-status-new);
    box-shadow: 0 0 4px rgba(59, 130, 246, 0.3);
}

.activity-timeline-bar[data-status="baseline"] {
    background: var(--timeline-status-baseline);
}

.activity-timeline-bar[data-status="burst"] {
    background: var(--timeline-status-burst);
    box-shadow: 0 0 5px rgba(245, 158, 11, 0.4);
}

.activity-timeline-bar[data-status="flagged"] {
    background: var(--timeline-status-flagged);
    box-shadow: 0 0 6px rgba(239, 68, 68, 0.5);
    animation: timeline-flagged-pulse 2s ease-in-out infinite;
}

@keyframes timeline-flagged-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.activity-timeline-lane:hover .activity-timeline-bar {
    opacity: 0.9;
}

/* ============================================
   EXPANDED VIEW (tick marks)
   ============================================ */
.activity-timeline-ticks {
    display: none;
    position: relative;
    height: 24px;
    margin-top: 4px;
    border-top: 1px solid var(--timeline-border);
    padding-top: 4px;
}

.activity-timeline-lane.expanded .activity-timeline-ticks {
    display: block;
}

.activity-timeline-tick {
    position: absolute;
    bottom: 0;
    width: 1px;
    background: var(--timeline-accent);
}

.activity-timeline-tick[data-strength="1"] { height: 4px; }
.activity-timeline-tick[data-strength="2"] { height: 8px; }
.activity-timeline-tick[data-strength="3"] { height: 12px; }
.activity-timeline-tick[data-strength="4"] { height: 16px; }
.activity-timeline-tick[data-strength="5"] { height: 20px; }

/* ============================================
   STATS COLUMN
   ============================================ */
.activity-timeline-stats {
    width: 45px;
    min-width: 45px;
    padding: 4px 6px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-end;
    font-size: 9px;
    color: var(--timeline-text-dim);
    border-left: 1px solid var(--timeline-border);
}

.activity-timeline-stat-count {
    color: var(--timeline-text-primary);
    font-weight: 500;
}

.activity-timeline-stat-label {
    font-size: 8px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

/* ============================================
   ANNOTATIONS
   ============================================ */
.activity-timeline-annotations {
    margin-top: 6px;
    padding-top: 6px;
    border-top: 1px solid var(--timeline-border);
    max-height: 80px;
    overflow-y: auto;
}

.activity-timeline-annotation {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 8px;
    font-size: 10px;
    color: var(--timeline-text-secondary);
    background: var(--timeline-bg-secondary);
    border-radius: 3px;
    margin-bottom: 4px;
}

.activity-timeline-annotation-icon {
    font-size: 10px;
    width: 14px;
    text-align: center;
}

.activity-timeline-annotation[data-type="new"] {
    border-left: 2px solid var(--timeline-status-new);
}

.activity-timeline-annotation[data-type="burst"] {
    border-left: 2px solid var(--timeline-status-burst);
}

.activity-timeline-annotation[data-type="pattern"] {
    border-left: 2px solid var(--timeline-accent);
}

.activity-timeline-annotation[data-type="flagged"] {
    border-left: 2px solid var(--timeline-status-flagged);
    color: var(--timeline-status-flagged);
}

.activity-timeline-annotation[data-type="gone"] {
    border-left: 2px solid var(--timeline-status-gone);
}

/* ============================================
   TOOLTIP
   ============================================ */
.activity-timeline-tooltip {
    position: fixed;
    z-index: 10000;
    background: var(--timeline-bg-elevated);
    border: 1px solid var(--timeline-border);
    border-radius: 4px;
    padding: 8px 10px;
    font-size: 10px;
    color: var(--timeline-text-primary);
    pointer-events: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    max-width: 240px;
    font-family: var(--font-mono);
}

.activity-timeline-tooltip-header {
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--timeline-accent);
}

.activity-timeline-tooltip-row {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    color: var(--timeline-text-secondary);
    line-height: 1.5;
}

.activity-timeline-tooltip-row span:last-child {
    color: var(--timeline-text-primary);
}

/* ============================================
   LEGEND
   ============================================ */
.activity-timeline-legend {
    display: flex;
    gap: 12px;
    padding-top: 8px;
    margin-top: 8px;
    border-top: 1px solid var(--timeline-border);
    font-size: 9px;
    color: var(--timeline-text-dim);
}

.activity-timeline-legend-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.activity-timeline-legend-dot {
    width: 6px;
    height: 6px;
    border-radius: 2px;
}

.activity-timeline-legend-dot.new { background: var(--timeline-status-new); }
.activity-timeline-legend-dot.baseline { background: var(--timeline-status-baseline); }
.activity-timeline-legend-dot.burst { background: var(--timeline-status-burst); }
.activity-timeline-legend-dot.flagged { background: var(--timeline-status-flagged); }

/* ============================================
   EMPTY STATE
   ============================================ */
.activity-timeline-empty {
    text-align: center;
    padding: 24px 16px;
    color: var(--timeline-text-dim);
    font-size: 11px;
}

.activity-timeline-empty-icon {
    font-size: 20px;
    margin-bottom: 8px;
    opacity: 0.4;
}

/* More indicator */
.activity-timeline-more {
    text-align: center;
    padding: 8px;
    font-size: 10px;
    color: var(--timeline-text-dim);
}

/* ============================================
   VISUAL MODE: COMPACT
   ============================================ */
.activity-timeline--compact .activity-timeline-lanes {
    max-height: 140px;
}

.activity-timeline--compact .activity-timeline-lane {
    min-height: 26px;
}

.activity-timeline--compact .activity-timeline-label {
    width: 100px;
    min-width: 100px;
    padding: 4px 6px;
}

.activity-timeline--compact .activity-timeline-id {
    display: none;
}

.activity-timeline--compact .activity-timeline-name {
    font-size: 10px;
    color: var(--timeline-text-secondary);
}

.activity-timeline--compact .activity-timeline-track {
    min-height: 26px;
}

.activity-timeline--compact .activity-timeline-bar {
    height: 10px !important;
}

.activity-timeline--compact .activity-timeline-bar[data-strength="1"] { height: 4px !important; }
.activity-timeline--compact .activity-timeline-bar[data-strength="2"] { height: 6px !important; }
.activity-timeline--compact .activity-timeline-bar[data-strength="3"] { height: 8px !important; }
.activity-timeline--compact .activity-timeline-bar[data-strength="4"] { height: 10px !important; }
.activity-timeline--compact .activity-timeline-bar[data-strength="5"] { height: 12px !important; }

.activity-timeline--compact .activity-timeline-stats {
    width: 30px;
    min-width: 30px;
}

.activity-timeline--compact .activity-timeline-stat-label {
    display: none;
}

.activity-timeline--compact .activity-timeline-legend {
    display: none;
}

.activity-timeline--compact .activity-timeline-axis {
    padding-left: 110px;
    padding-right: 40px;
}

/* ============================================
   VISUAL MODE: SUMMARY
   ============================================ */
.activity-timeline--summary .activity-timeline-lanes {
    max-height: 100px;
}

.activity-timeline--summary .activity-timeline-lane {
    min-height: 20px;
}

.activity-timeline--summary .activity-timeline-label {
    width: 80px;
    min-width: 80px;
    padding: 3px 6px;
}

.activity-timeline--summary .activity-timeline-id,
.activity-timeline--summary .activity-timeline-name {
    font-size: 9px;
}

.activity-timeline--summary .activity-timeline-status {
    width: 3px;
    min-width: 3px;
}

.activity-timeline--summary .activity-timeline-track {
    min-height: 20px;
}

.activity-timeline--summary .activity-timeline-bar {
    height: 8px !important;
    border-radius: 1px;
}

.activity-timeline--summary .activity-timeline-stats {
    display: none;
}

.activity-timeline--summary .activity-timeline-ticks {
    display: none !important;
}

.activity-timeline--summary .activity-timeline-annotations {
    display: none;
}

.activity-timeline--summary .activity-timeline-legend {
    display: none;
}

.activity-timeline--summary .activity-timeline-axis {
    padding-left: 90px;
    padding-right: 10px;
    font-size: 8px;
}

/* ============================================
   BACKWARD COMPATIBILITY NOTE
   The old signal-timeline.css is still loaded
   for existing TSCM code that uses those classes.
   New code should use activity-timeline classes.
   ============================================ */