/* Root Variables */
:root {
    /* Light Theme */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;
    --border-color: #dee2e6;
    --border-hover: #adb5bd;
    --accent-primary: #0d6efd;
    --accent-secondary: #6c757d;
    --success: #198754;
    --danger: #dc3545;
    --warning: #ffc107;
    --shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --shadow-lg: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;

    /* Fonts */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #212529;
    --bg-secondary: #343a40;
    --bg-tertiary: #495057;
    --text-primary: #f8f9fa;
    --text-secondary: #adb5bd;
    --text-muted: #6c757d;
    --border-color: #495057;
    --border-hover: #6c757d;
    --accent-primary: #0d6efd;
    --accent-secondary: #6c757d;
    --success: #198754;
    --danger: #dc3545;
    --warning: #ffc107;
    --shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 0.5rem 1rem rgba(0, 0, 0, 0.4);
}

/* Base Styles */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out;
}

/* Container */
.container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 100%;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.header h1 {
    margin: 0;
    font-size: var(--font-size-xl);
    font-weight: 600;
}

.header-controls {
    display: flex;
    gap: var(--spacing-sm);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.15s ease-in-out;
}

.btn:hover {
    background-color: var(--border-hover);
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

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

.btn-primary:hover {
    background-color: #0b5ed7;
    border-color: #0a58ca;
    color: white;
}

.btn-secondary {
    color: var(--text-primary);
    background-color: var(--accent-secondary);
    border-color: var(--accent-secondary);
}

.btn-secondary:hover {
    background-color: #5a6268;
    border-color: #545b62;
    color: white;
}

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

.btn-danger:hover {
    background-color: #bb2d3b;
    border-color: #b02a37;
    color: white;
}

.btn-small {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.btn-icon {
    padding: var(--spacing-sm);
    font-size: var(--font-size-lg);
}

.btn-github {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
}

.github-text {
    font-weight: 500;
}

.github-icon {
    flex-shrink: 0;
    transition: transform 0.15s ease-in-out;
}

.btn-github:hover .github-icon {
    transform: scale(1.1);
}

/* Error Bar */
.error-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: #f8d7da;
    color: #721c24;
    border-bottom: 1px solid #f5c6cb;
}

[data-theme="dark"] .error-bar {
    background-color: #2c0b0e;
    color: #ea868f;
    border-color: #842029;
}

.btn-close {
    background: none;
    border: none;
    font-size: var(--font-size-lg);
    cursor: pointer;
    color: inherit;
    padding: 0;
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-close:hover {
    opacity: 0.7;
}

/* Main Content */
.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 280px;
    min-width: 280px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.section h3 {
    margin: 0 0 var(--spacing-md) 0;
    font-size: var(--font-size-base);
    font-weight: 600;
}

.section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.template-select {
    width: 100%;
    padding: var(--spacing-sm);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
}

.template-select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(13, 110, 253, 0.25);
}

.info-text {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.4;
}

/* Editor Container */
.editor-container {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.editor-section,
.preview-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.editor-section {
    border-right: 1px solid var(--border-color);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.section-header h3 {
    margin: 0;
    font-size: var(--font-size-base);
    font-weight: 600;
}

.editor-controls,
.preview-controls {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.char-count {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* Editor */
#editor {
    flex: 1;
    width: 100%;
    padding: var(--spacing-md);
    font-family: var(--font-mono);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    border: none;
    resize: none;
    outline: none;
    tab-size: 2;
}

#editor::placeholder {
    color: var(--text-muted);
}

/* Preview */
.preview-pane {
    flex: 1;
    padding: var(--spacing-md);
    background-color: var(--bg-primary);
    overflow: auto;
    position: relative;
}

.preview-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    color: var(--text-muted);
}

.preview-placeholder p {
    margin: var(--spacing-sm) 0;
}

/* Mermaid Diagram Styling */
#preview .mermaid {
    display: flex;
    justify-content: center;
    align-items: center;
}

#preview svg {
    max-width: 100%;
    height: auto;
    transition: transform 0.2s ease-in-out;
}

.zoom-in #preview svg {
    transform: scale(1.2);
}

.zoom-out #preview svg {
    transform: scale(0.8);
}

/* Status Bar */
.status-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background-color: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 400px;
    width: 90%;
}

.modal-content h3 {
    margin: 0 0 var(--spacing-md) 0;
    font-size: var(--font-size-lg);
}

.modal-content p {
    margin: 0 0 var(--spacing-lg) 0;
    color: var(--text-secondary);
}

.modal-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.text-success {
    color: var(--success) !important;
}

.text-danger {
    color: var(--danger) !important;
}

.text-warning {
    color: var(--warning) !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        min-width: unset;
        max-height: 200px;
        overflow-y: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .editor-container {
        flex-direction: column;
    }

    .editor-section {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .editor-section,
    .preview-section {
        min-height: 300px;
    }

    .header {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .header h1 {
        font-size: var(--font-size-lg);
    }
}

@media (max-width: 480px) {
    .sidebar {
        padding: var(--spacing-md);
    }

    .section-header {
        padding: var(--spacing-sm);
    }

    #editor {
        padding: var(--spacing-sm);
    }

    .preview-pane {
        padding: var(--spacing-sm);
    }

    .status-bar {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.75rem;
    }
}

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

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-hover);
    border-radius: var(--radius-md);
}

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

/* Focus Styles */
button:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.pulse {
    animation: pulse 1s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }
}