/* Updated styles.css with accent color system */

:root {
    --primary-accent: #0ea5e9;
    --primary-accent-hover: #0284c7;
    --primary-accent-light: rgba(14, 165, 233, 0.1);
    --primary-accent-border: rgba(14, 165, 233, 0.3);
    
    --success-color: #10b981;
    --success-hover: #059669;
    --warning-color: #f59e0b;
    --warning-hover: #d97706;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    
    --bg-primary: #1e1e1e;
    --bg-secondary: #242424;
    --bg-tertiary: #2d2d2d;
    --bg-quaternary: #404040;
    
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-tertiary: #aaaaaa;
    --text-quaternary: #888888;
    
    --border-primary: #444444;
    --border-secondary: #555555;
    --border-tertiary: #666666;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
}

/* Control buttons */
.top-controls {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 1000;
    display: flex;
    gap: 10px;
}

.control-btn {
    background: var(--primary-accent);
    border: none;
    color: white;
    padding: 10px 15px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.control-btn:hover {
    background: var(--primary-accent-hover);
    transform: translateY(-1px);
}

.control-btn i {
    font-size: 14px;
}

.export-btn {
    background: var(--success-color);
}

.export-btn:hover {
    background: var(--success-hover);
}

.import-btn {
    background: var(--warning-color);
}

.import-btn:hover {
    background: var(--warning-hover);
}

/* App layout */
.app-container {
    display: flex;
    height: 100vh;
}

.timeline-container {
    flex: 1;
    position: relative;
    overflow: hidden;
    background: var(--bg-secondary);
}

/* Timeline canvas */
.timeline-canvas {
    width: 100%;
    height: 100%;
    cursor: grab;
    position: relative;
}

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

.timeline-axis {
    position: absolute;
    bottom: 100px;
    left: 0;
    right: 0;
    height: 20px;
    background: var(--border-secondary);
    cursor: crosshair;
    border-radius: 2px;
}

.timeline-axis:hover {
    background: var(--border-tertiary);
}

/* Timeline markers */
.timeline-start-marker, .timeline-end-marker {
    position: absolute;
    bottom: 80px;
    width: 3px;
    height: 60px;
    background: var(--danger-color);
    z-index: 10;
}

.timeline-end-marker {
    background: var(--success-color);
}

.timeline-start-label, .timeline-end-label {
    position: absolute;
    bottom: 45px;
    font-size: 11px;
    color: var(--danger-color);
    transform: translateX(-50%);
    white-space: nowrap;
    font-weight: bold;
    padding: 2px 6px;
    background: rgba(0,0,0,0.7);
    border-radius: 3px;
    border: 1px solid currentColor;
}

.timeline-end-label {
    color: var(--success-color);
}

/* Timeline elements */
.timeline-tick {
    position: absolute;
    bottom: -5px;
    width: 2px;
    height: 12px;
    background: var(--text-quaternary);
}

.timeline-label {
    position: absolute;
    bottom: -30px;
    font-size: 11px;
    color: var(--text-tertiary);
    transform: translateX(-50%);
    white-space: nowrap;
    text-align: center;
    line-height: 1.2;
    max-width: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Timeline items */
.timeline-item {
    position: absolute;
    background: var(--primary-accent);
    border-radius: 4px;
    padding: 8px 12px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 2px solid transparent;
    min-width: 100px;
    user-select: none;
    z-index: 20;
    color: white;
}

.timeline-item::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    z-index: -1;
}

.timeline-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.timeline-item.selected {
    border-color: var(--text-primary);
    box-shadow: 0 0 0 1px var(--primary-accent-border);
}

.timeline-item.period {
    height: 30px;
    display: flex;
    align-items: center;
}

.timeline-item.event {
    border-radius: 12px;
    min-width: 80px;
    height: 24px;
    padding: 4px 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Color variations for items */
.timeline-item.accent-blue { background: #0ea5e9; }
.timeline-item.accent-green { background: #10b981; }
.timeline-item.accent-yellow { background: #f59e0b; }
.timeline-item.accent-red { background: #ef4444; }
.timeline-item.accent-purple { background: #8b5cf6; }
.timeline-item.accent-pink { background: #ec4899; }
.timeline-item.accent-indigo { background: #6366f1; }
.timeline-item.accent-teal { background: #14b8a6; }

/* Hover info */
.hover-info {
    position: absolute;
    background: rgba(0,0,0,0.9);
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 12px;
    pointer-events: none;
    z-index: 100;
    white-space: nowrap;
    border: 1px solid var(--border-secondary);
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

/* Period preview */
.period-preview {
    position: absolute;
    bottom: 100px;
    height: 20px;
    background: var(--primary-accent-light);
    border: 2px dashed var(--primary-accent);
    border-radius: 4px;
    pointer-events: none;
}

/* Edit panel */
.edit-panel {
    width: 300px;
    background: var(--bg-tertiary);
    border-left: 1px solid var(--border-primary);
    padding: 20px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
}

.edit-panel.open {
    transform: translateX(0);
}

.edit-panel h3 {
    margin-bottom: 20px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Form elements */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: var(--text-secondary);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg-quaternary);
    border: 1px solid var(--border-secondary);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 14px;
}

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

/* Custom date input */
.custom-date-input {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.date-unit {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 50px;
}

.date-unit label {
    font-size: 10px;
    color: var(--text-quaternary);
    margin-bottom: 2px;
    text-transform: uppercase;
}

.date-unit input {
    width: 100%;
    padding: 6px 8px;
    background: var(--bg-quaternary);
    border: 1px solid var(--border-secondary);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 14px;
    text-align: center;
    cursor: ew-resize;
    user-select: none;
}

.date-unit input:focus {
    outline: none;
    border-color: var(--primary-accent);
    cursor: text;
}

.date-unit input:hover:not(:focus) {
    background: var(--bg-tertiary);
}

.date-unit input.dragging {
    cursor: ew-resize;
    background: var(--primary-accent);
}

/* Buttons */
.btn {
    background: var(--primary-accent);
    border: none;
    color: white;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    margin-right: 10px;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn:hover {
    background: var(--primary-accent-hover);
}

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

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

/* Modals */
.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: 2000;
}

.modal.open {
    display: flex;
}

.modal-content {
    background: var(--bg-tertiary);
    padding: 30px;
    border-radius: 8px;
    min-width: 400px;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-content h3 {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Help modal specific styles */
.help-modal {
    max-width: 800px;
    min-width: 600px;
}

.help-sections {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.help-section h4 {
    color: var(--primary-accent);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
}

.shortcut-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.shortcut {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 4px 0;
}

.shortcut kbd {
    background: var(--bg-quaternary);
    border: 1px solid var(--border-secondary);
    border-radius: 3px;
    padding: 2px 6px;
    font-size: 11px;
    font-family: monospace;
    color: var(--text-secondary);
    min-width: 24px;
    text-align: center;
}

.shortcut span {
    color: var(--text-tertiary);
    font-size: 12px;
}

/* Color picker */
.color-picker {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.color-option {
    width: 30px;
    height: 30px;
    border-radius: 4px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s ease;
}

.color-option.selected {
    border-color: var(--text-primary);
    transform: scale(1.1);
}

/* Zoom controls */
.zoom-controls {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: flex;
    gap: 10px;
}

.zoom-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-accent);
    border: none;
    color: white;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.zoom-btn:hover {
    background: var(--primary-accent-hover);
    transform: scale(1.1);
}

/* Instructions */
.instructions {
    z-index: 10;
    position: fixed;
    bottom: 20px;
    left: 20px;
    background: rgba(0,0,0,0.6);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: 6px;
    font-size: 12px;
    max-width: 280px;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid var(--border-secondary);
}

.instructions:hover {
    background: rgba(0,0,0,0.9);
    border-color: var(--primary-accent);
}

.instructions i {
    color: var(--primary-accent);
    margin-right: 4px;
}

.instructions small {
    color: var(--text-tertiary);
    display: block;
    margin-top: 4px;
}

/* Auto save indicator */
.auto-save-indicator {
    color: var(--success-color);
    font-size: 12px;
    margin-top: 10px;
    opacity: 0;
    transition: opacity 0.3s ease;
    display: flex;
    align-items: center;
    gap: 4px;
}

.auto-save-indicator.show {
    opacity: 1;
}

/* Warning box */
.warning-box {
    background: rgba(245, 158, 11, 0.1);
    border: 2px solid var(--warning-color);
    border-radius: 6px;
    padding: 15px;
    margin: 15px 0;
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.warning-icon {
    font-size: 20px;
    color: var(--warning-color);
    flex-shrink: 0;
}

.warning-text {
    color: var(--warning-color);
    line-height: 1.4;
}

/* File input */
.file-input-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 5px;
}

.file-input-btn {
    background: var(--border-secondary);
    border: 1px solid var(--border-tertiary);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.file-input-btn:hover {
    background: var(--border-tertiary);
}

.selected-file {
    color: var(--text-tertiary);
    font-size: 14px;
    font-style: italic;
}

.selected-file.has-file {
    color: var(--success-color);
    font-style: normal;
}

/* Export info */
.export-info {
    background: var(--bg-quaternary);
    padding: 15px;
    border-radius: 6px;
    margin: 15px 0;
    border-left: 4px solid var(--success-color);
}

.export-info p {
    margin: 0 0 10px 0;
    color: var(--success-color);
    display: flex;
    align-items: center;
    gap: 6px;
}

.export-info ul {
    margin: 0;
    padding-left: 20px;
    color: var(--text-secondary);
}

.export-info li {
    margin: 5px 0;
}

/* Notifications */
.notification {
    position: fixed;
    top: 80px;
    right: 20px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: 6px;
    padding: 15px 20px;
    color: var(--text-primary);
    font-size: 14px;
    z-index: 3000;
    display: flex;
    align-items: center;
    gap: 10px;
    max-width: 400px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    cursor: pointer;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    border-color: var(--success-color);
    background: rgba(16, 185, 129, 0.1);
}

.notification.error {
    border-color: var(--danger-color);
    background: rgba(239, 68, 68, 0.1);
}

.notification.info {
    border-color: var(--primary-accent);
    background: var(--primary-accent-light);
}

.notification-icon {
    font-size: 16px;
    flex-shrink: 0;
}

.notification-message {
    flex: 1;
    line-height: 1.4;
}

/* Info grid */
.info-grid {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 10px 20px;
    margin: 20px 0;
}

.info-label {
    font-weight: bold;
    color: var(--text-secondary);
}

.info-value {
    color: var(--text-primary);
}

/* Drag overlay */
.drag-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    cursor: ew-resize;
    z-index: 3000;
    user-select: none;
}

/* Small text */
small {
    display: block;
    margin-top: 5px;
    font-size: 12px;
    color: var(--text-tertiary);
}

/* Responsive adjustments */
@media (max-width: 1200px) {
    .help-sections {
        grid-template-columns: 1fr;
    }
    
    .help-modal {
        min-width: 500px;
        max-width: 600px;
    }
}

@media (max-width: 768px) {
    .top-controls {
        flex-direction: column;
        gap: 5px;
    }
    
    .control-btn {
        padding: 8px 12px;
        font-size: 12px;
    }
    
    .instructions {
        font-size: 10px;
        max-width: 200px;
        padding: 8px 12px;
    }
    
    .edit-panel {
        width: 280px;
    }
    
    .modal-content {
        min-width: 320px;
        max-width: 90vw;
        padding: 20px;
    }
}