/* Timeline Application Styles */

:root {
    --track-label-width: 220px;
    --track-height: 60px;
    --month-width: 20px;
    --zoom-level: 1;
    --pan-x: 0px;
    
    --color-bg: #1a1a2e;
    --color-surface: #16213e;
    --color-surface-elevated: #1f3460;
    --color-text: #eee;
    --color-text-muted: #aaa;
    --color-primary: #3498db;
    --color-danger: #e74c3c;
    --color-success: #2ecc71;
    --color-border: #2a3f5f;
    
    /* Animation timing */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.25s ease-out;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Toolbar */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
}

.toolbar-left h1 {
    font-size: 1.25rem;
    font-weight: 600;
}

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

.toolbar-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.zoom-level {
    min-width: 60px;
    text-align: center;
    font-variant-numeric: tabular-nums;
    color: var(--color-text-muted);
}

.connection-indicator {
    margin-left: 0.5rem;
    font-size: 0.75rem;
}

/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    font-size: 0.875rem;
    cursor: pointer;
    background: var(--color-surface-elevated);
    color: var(--color-text);
    transition: background 0.2s, transform 0.1s;
}

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

.btn:active {
    transform: scale(0.98);
}

.btn-icon {
    padding: 0.5rem;
    min-width: 36px;
}

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

.btn-primary:hover {
    background: #2980b9;
}

.btn-danger {
    background: var(--color-danger);
    color: white;
}

.btn-danger:hover {
    background: #c0392b;
}

/* Timeline Wrapper */
.timeline-wrapper {
    flex: 1;
    overflow-x: auto;
    overflow-y: auto;
    position: relative;
    cursor: grab;
    background: 
        linear-gradient(90deg, var(--color-surface) var(--track-label-width), transparent var(--track-label-width)),
        var(--color-bg);
    /* These are set dynamically via Datastar data-style binding */
    --zoom-level: 1;
    --pan-x: 0px;
}

.timeline-wrapper:active {
    cursor: grabbing;
}

.timeline-container {
    min-height: 100%;
    transform: translateX(var(--pan-x));
    /* No transition - pan is always instant */
}

.timeline-content {
    position: relative;
    min-width: max-content;
}

/* Timeline Header */
.timeline-header {
    display: flex;
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.track-label-spacer {
    width: var(--track-label-width);
    flex-shrink: 0;
    background: var(--color-surface);
}

.timeline-years {
    display: flex;
    padding: 0.5rem 0;
}

.year-marker {
    display: flex;
    flex-direction: column;
    width: calc(12 * var(--month-width) * var(--zoom-level));
    border-left: 1px solid var(--color-border);
    transition: width var(--transition-normal);
}

.year-label {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0 0.5rem;
    color: var(--color-text-muted);
}

.month-markers {
    display: flex;
    height: 20px;
}

.month-marker {
    flex: 1;
    border-left: 1px solid var(--color-border);
    opacity: 0.3;
}

.month-marker:nth-child(1),
.month-marker:nth-child(4),
.month-marker:nth-child(7),
.month-marker:nth-child(10) {
    opacity: 0.6;
}

.month-marker.current {
    background: var(--color-primary);
    opacity: 1;
}

/* Timeline Tracks */
.timeline-tracks {
    position: relative;
}

.track {
    display: flex;
    min-height: var(--track-height);
    border-bottom: 1px solid var(--color-border);
}

.track-label {
    width: var(--track-label-width);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.5rem 0.5rem 0;
    background: var(--color-surface);
    position: sticky;
    left: 0;
    z-index: 10;
    /* Ensure items don't show through */
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

/* Drag handle */
.drag-handle {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    cursor: grab;
    color: var(--color-text-muted);
    opacity: 0.5;
    transition: opacity 0.15s, color 0.15s;
}

.drag-handle:hover {
    opacity: 1;
    color: var(--color-text);
}

.drag-handle:active {
    cursor: grabbing;
}

/* Clickable track info */
.track-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    transition: background 0.15s;
}

.track-info:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Drag states */
.track.dragging {
    opacity: 0.5;
}

.track.drag-over {
    background: var(--color-primary);
    background: rgba(52, 152, 219, 0.15);
}

.track.drag-over .track-label {
    border-top: 2px solid var(--color-primary);
}

.track-icon {
    font-size: 1.25rem;
}

.track-name {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.track-count {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.track-items {
    position: relative;
    flex: 1;
    min-height: var(--track-height);
    padding: 0.5rem 0;
}

.track-empty {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    font-size: 0.875rem;
    font-style: italic;
}

/* Timeline Items */
.timeline-item {
    position: absolute;
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    /* Zoom-aware positioning via custom properties set inline */
    --item-left: 0;
    --item-width: 100;
    left: calc(var(--item-left) * var(--zoom-level) * 1px);
    width: calc(var(--item-width) * var(--zoom-level) * 1px);
    transition: left var(--transition-normal), width var(--transition-normal), 
                transform 0.1s, box-shadow 0.1s;
}

.timeline-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    z-index: 5;
}

.item-title {
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.ongoing-indicator {
    font-size: 0.875rem;
    margin-left: 0.25rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.timeline-item.ongoing {
    background-image: 
        repeating-linear-gradient(
            -45deg,
            transparent,
            transparent 5px,
            rgba(255, 255, 255, 0.1) 5px,
            rgba(255, 255, 255, 0.1) 10px
        );
}

/* Resize Handles */
.resize-handle {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 8px;
    cursor: ew-resize;
    opacity: 0;
    transition: opacity 0.15s, background 0.15s;
    z-index: 10;
}

.resize-handle::before {
    content: '';
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 2px;
    height: 16px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 1px;
}

.resize-handle-start {
    left: 0;
    border-radius: 4px 0 0 4px;
}

.resize-handle-start::before {
    left: 3px;
}

.resize-handle-end {
    right: 0;
    border-radius: 0 4px 4px 0;
}

.resize-handle-end::before {
    right: 3px;
}

.timeline-item:hover .resize-handle {
    opacity: 1;
    background: rgba(0, 0, 0, 0.3);
}

.resize-handle:hover {
    background: rgba(0, 0, 0, 0.5) !important;
}

.timeline-item.resizing {
    z-index: 100 !important;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
    /* Disable transitions during resize for instant feedback */
    transition: none !important;
}

.timeline-item.resizing .resize-handle {
    opacity: 1;
    background: var(--color-primary);
}

/* Resize tooltip */
.resize-tooltip {
    position: fixed;
    background: var(--color-surface-elevated);
    color: var(--color-text);
    padding: 0.375rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    pointer-events: none;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    white-space: nowrap;
}

/* Now Line */
.now-line {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-danger);
    z-index: 40;
    pointer-events: none;
    --now-position: 0;
    left: calc(var(--track-label-width) + var(--now-position) * var(--zoom-level) * 1px);
    transition: left var(--transition-normal);
}

.now-label {
    position: absolute;
    top: 4px;
    left: 4px;
    font-size: 0.625rem;
    font-weight: 600;
    color: var(--color-danger);
    text-transform: uppercase;
    white-space: nowrap;
}

/* Empty State */
.empty-state {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    color: var(--color-text-muted);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
    /* Reset dialog defaults */
    border: none;
    margin: 0;
    max-width: none;
    max-height: none;
    /* Center the dialog element itself */
    align-self: center;
    justify-self: center;
}

.modal.open,
.modal[open] {
    display: flex;
}

.modal-content {
    background: var(--color-surface);
    border-radius: 12px;
    padding: 1.5rem;
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.modal-content h2 {
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
    color: var(--color-text);
}

.modal-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.modal-actions .btn-danger {
    margin-right: auto;
}

/* Form */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.375rem;
    color: var(--color-text-muted);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.625rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background: var(--color-surface-elevated);
    color: var(--color-text);
    font-size: 0.875rem;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-group textarea {
    min-height: 80px;
    resize: vertical;
}

.form-group input[type="color"] {
    padding: 0.25rem;
    height: 40px;
    cursor: pointer;
}

.form-row {
    display: flex;
    gap: 1rem;
}

.form-row .form-group {
    flex: 1;
}

/* Debug Panel */
.debug-panel {
    position: fixed;
    bottom: 0;
    right: 0;
    max-width: 400px;
    max-height: 300px;
    overflow: auto;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px 0 0 0;
    font-size: 0.75rem;
    z-index: 999;
}

.debug-panel summary {
    padding: 0.5rem;
    cursor: pointer;
    background: var(--color-surface-elevated);
}

.debug-panel pre {
    padding: 0.5rem;
    margin: 0;
    white-space: pre-wrap;
    word-break: break-all;
}

/* Responsive */
@media (max-width: 768px) {
    .toolbar {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .toolbar-left {
        order: 1;
        width: 100%;
    }
    
    .toolbar-center {
        order: 3;
    }
    
    .toolbar-right {
        order: 2;
    }
    
    :root {
        --track-label-width: 120px;
    }
    
    .track-name {
        font-size: 0.75rem;
    }
    
    .modal-content {
        padding: 1rem;
    }
    
    .form-row {
        flex-direction: column;
        gap: 0;
    }
}