/* CSS Variables for theming */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #64748b;
    --secondary-hover: #475569;
    --danger-color: #ef4444;
    --danger-hover: #dc2626;
    --success-color: #22c55e;
    --background-color: #f8fafc;
    --surface-color: #ffffff;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;

    /* Plot point type colors */
    --color-setup: #4CAF50;
    --color-rising: #2196F3;
    --color-climax: #FF5722;
    --color-falling: #9C27B0;
    --color-resolution: #607D8B;
}

/* Reset and base styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

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

/* Header */
.app-header {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1800px;
    margin: 0 auto;
    gap: 1rem;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo {
    width: 36px;
    height: 36px;
    object-fit: contain;
}

.logo-section h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

.header-nav {
    display: flex;
    gap: 0.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-icon {
    font-size: 1rem;
}

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

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

.btn-secondary {
    background-color: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

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

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

.btn-small {
    padding: 0.375rem 0.75rem;
    font-size: 0.813rem;
}

/* Main content */
.main-content {
    display: flex;
    flex: 1;
    max-width: 1800px;
    margin: 0 auto;
    width: 100%;
    padding: 1.5rem;
    gap: 1.5rem;
}

/* Sidebar */
.sidebar {
    width: 320px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.sidebar section {
    background-color: var(--surface-color);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.sidebar h2 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.025em;
    margin-bottom: 1rem;
}

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

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    font-size: 0.813rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.375rem;
}

.input-field {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-primary);
    background-color: var(--surface-color);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input-field:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.input-field::placeholder {
    color: var(--text-muted);
}

.textarea-field {
    min-height: 100px;
    resize: vertical;
}

.range-field {
    width: 100%;
    cursor: pointer;
}

.range-value {
    display: inline-block;
    min-width: 40px;
    text-align: center;
    font-size: 0.813rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Arc templates */
.arc-templates {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.arc-template-btn {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 0.75rem 1rem;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: left;
}

.arc-template-btn:hover {
    border-color: var(--primary-color);
    background-color: rgba(99, 102, 241, 0.05);
}

.arc-template-btn.active {
    border-color: var(--primary-color);
    background-color: rgba(99, 102, 241, 0.1);
}

.template-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.template-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.125rem;
}

/* Plot points section */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.section-header h2 {
    margin-bottom: 0;
}

.plot-points-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 400px;
    overflow-y: auto;
}

.plot-point-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background-color: var(--background-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.plot-point-item:hover {
    background-color: rgba(99, 102, 241, 0.05);
    border-color: var(--border-color);
}

.plot-point-color {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}

.plot-point-info {
    flex: 1;
    min-width: 0;
}

.plot-point-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.plot-point-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.plot-point-drag {
    color: var(--text-muted);
    cursor: grab;
}

/* Visualization area */
.visualization-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--surface-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.visualization-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.visualization-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.view-controls {
    display: flex;
    gap: 0.5rem;
}

.view-btn {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.813rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

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

/* Visualization container */
.visualization-container {
    flex: 1;
    position: relative;
    min-height: 400px;
    overflow: hidden;
}

.arc-view, .timeline-view {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding: 1.5rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.arc-view.active, .timeline-view.active {
    opacity: 1;
    visibility: visible;
}

#arcCanvas {
    width: 100%;
    height: 100%;
}

.arc-labels {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.arc-label {
    position: absolute;
    background-color: var(--surface-color);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    font-size: 0.75rem;
    font-weight: 500;
    pointer-events: auto;
    cursor: pointer;
    border: 2px solid;
    max-width: 150px;
    transform: translate(-50%, -100%);
    margin-top: -10px;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    z-index: 10;
}

.arc-label:hover {
    transform: translate(-50%, -100%) scale(1.05);
    box-shadow: var(--shadow-lg);
}

.arc-label-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Timeline view */
.timeline-container {
    position: relative;
    width: 100%;
    height: 100%;
    overflow-x: auto;
    overflow-y: hidden;
}

.timeline-track {
    position: absolute;
    top: 50%;
    left: 2rem;
    right: 2rem;
    height: 4px;
    background-color: var(--border-color);
    border-radius: 2px;
    transform: translateY(-50%);
}

.timeline-point {
    position: absolute;
    transform: translate(-50%, -50%);
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.timeline-point:hover {
    transform: translate(-50%, -50%) scale(1.1);
}

.timeline-point-marker {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 3px solid var(--surface-color);
    box-shadow: var(--shadow-md);
}

.timeline-point-label {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-top: 0.75rem;
    background-color: var(--surface-color);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    border: 1px solid var(--border-color);
}

.timeline-point:nth-child(even) .timeline-point-label {
    top: auto;
    bottom: 100%;
    margin-top: 0;
    margin-bottom: 0.75rem;
}

/* Visualization legend */
.visualization-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1rem 1.25rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--background-color);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 3px;
}

/* Footer */
.app-footer {
    background-color: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
    margin-top: auto;
}

.footer-content {
    text-align: center;
}

.footer-content p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.footer-content a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.footer-content a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    position: relative;
    background-color: var(--surface-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 480px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transform: scale(0.95);
    transition: transform var(--transition-normal);
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background-color: var(--background-color);
    color: var(--text-primary);
}

.modal-body {
    padding: 1.25rem;
    overflow-y: auto;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1.25rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--background-color);
}

/* Toast notifications */
.toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 1100;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background-color: var(--text-primary);
    color: white;
    padding: 0.875rem 1.25rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
}

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

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

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* File modal specific styles */
.saved-stories-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 300px;
    overflow-y: auto;
}

.saved-story-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background-color: var(--background-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.saved-story-item:hover {
    border-color: var(--primary-color);
    background-color: rgba(99, 102, 241, 0.05);
}

.saved-story-info h4 {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.saved-story-info p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.saved-story-delete {
    padding: 0.375rem;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.saved-story-delete:hover {
    background-color: var(--danger-color);
    color: white;
}

.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
}

.empty-state p {
    font-size: 0.875rem;
}

/* Responsive design */
@media (max-width: 1024px) {
    .main-content {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        flex-direction: row;
        flex-wrap: wrap;
    }

    .sidebar section {
        flex: 1;
        min-width: 280px;
    }

    .plot-points-list {
        max-height: 200px;
    }

    .visualization-container {
        min-height: 350px;
    }
}

@media (max-width: 768px) {
    .app-header {
        padding: 0.75rem 1rem;
    }

    .header-content {
        flex-wrap: wrap;
    }

    .logo-section h1 {
        font-size: 1rem;
    }

    .header-nav {
        width: 100%;
        justify-content: flex-end;
    }

    .btn-text {
        display: none;
    }

    .btn {
        padding: 0.5rem;
    }

    .main-content {
        padding: 1rem;
        gap: 1rem;
    }

    .sidebar section {
        min-width: 100%;
    }

    .sidebar {
        flex-direction: column;
    }

    .visualization-header {
        flex-direction: column;
        gap: 0.75rem;
        align-items: flex-start;
    }

    .visualization-legend {
        justify-content: center;
    }

    .arc-label {
        font-size: 0.688rem;
        padding: 0.375rem 0.5rem;
        max-width: 100px;
    }

    .timeline-point-label {
        font-size: 0.688rem;
        max-width: 80px;
    }
}

@media (max-width: 480px) {
    .logo-section h1 {
        font-size: 0.875rem;
    }

    .logo {
        width: 28px;
        height: 28px;
    }

    .view-btn span:last-child {
        display: none;
    }

    .visualization-container {
        min-height: 300px;
    }

    .modal-content {
        width: 95%;
        margin: 1rem;
    }

    .arc-templates {
        gap: 0.375rem;
    }

    .arc-template-btn {
        padding: 0.625rem 0.875rem;
    }
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* Print styles for export */
@media print {
    .app-header,
    .sidebar,
    .visualization-header,
    .visualization-legend,
    .app-footer {
        display: none !important;
    }

    .main-content {
        padding: 0;
    }

    .visualization-area {
        border: none;
        box-shadow: none;
    }

    .visualization-container {
        min-height: auto;
    }
}