@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500&family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700&display=swap');

:root {
  /* Light Theme */
  --bg-primary: #f8fafc;
  --bg-surface: #ffffff;
  --bg-element: #f1f5f9;
  --border-color: #e2e8f0;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-rgb: 99, 102, 241;
  
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  
  --font-sans: 'Inter', sans-serif;
  --font-display: 'Outfit', sans-serif;
  --font-mono: 'Fira Code', monospace;
  
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  /* Dark Theme */
  --bg-primary: #090d16;
  --bg-surface: #111827;
  --bg-element: #1f2937;
  --border-color: #374151;
  
  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --text-muted: #6b7280;
  
  --accent: #818cf8;
  --accent-hover: #6366f1;
  --accent-rgb: 129, 140, 248;
  
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.5);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: var(--transition);
}

/* Header Area */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  z-index: 10;
  transition: var(--transition);
}

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

.logo-icon {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: white;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-family: var(--font-display);
  box-shadow: 0 4px 12px rgba(var(--accent-rgb), 0.3);
}

.logo-text h1 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.025em;
}

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

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: white;
  border: none;
  box-shadow: 0 2px 4px rgba(var(--accent-rgb), 0.2);
}

.btn-primary:hover {
  color: white;
  background: var(--accent-hover);
  box-shadow: 0 4px 10px rgba(var(--accent-rgb), 0.3);
}

.btn-icon-only {
  padding: 0.5rem;
  border-radius: 8px;
  aspect-ratio: 1;
}

/* Workspace Container */
.workspace {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  overflow: hidden;
  position: relative;
}

/* Panel Design */
.panel {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  position: relative;
}

.panel:first-child {
  border-right: 1px solid var(--border-color);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1.5rem;
  background-color: var(--bg-element);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  color: var(--text-secondary);
  font-family: var(--font-display);
}

.panel-content {
  flex: 1;
  overflow: auto;
  position: relative;
}

/* Textarea styling */
.editor-textarea {
  width: 100%;
  height: 100%;
  border: none;
  outline: none;
  resize: none;
  padding: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  line-height: 1.6;
  background-color: var(--bg-surface);
  color: var(--text-primary);
  transition: var(--transition);
}

/* Preview Content Styling */
.preview-container {
  padding: 2rem 2.5rem;
  line-height: 1.7;
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 900px;
  margin: 0 auto;
}

/* Styling Markdown Elements inside Preview */
.preview-container h1,
.preview-container h2,
.preview-container h3,
.preview-container h4,
.preview-container h5,
.preview-container h6 {
  font-family: var(--font-display);
  color: var(--text-primary);
  margin-top: 1.5rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.preview-container h1 { font-size: 2.25rem; border-bottom: 2px solid var(--border-color); padding-bottom: 0.5rem; }
.preview-container h2 { font-size: 1.75rem; border-bottom: 1px solid var(--border-color); padding-bottom: 0.3rem; }
.preview-container h3 { font-size: 1.4rem; }
.preview-container h4 { font-size: 1.2rem; }

.preview-container p {
  margin-bottom: 1.25rem;
}

.preview-container a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dotted var(--accent);
  transition: var(--transition);
}

.preview-container a:hover {
  color: var(--accent-hover);
  border-bottom-style: solid;
}

.preview-container ul,
.preview-container ol {
  margin-bottom: 1.25rem;
  padding-left: 1.75rem;
}

.preview-container li {
  margin-bottom: 0.5rem;
}

.preview-container blockquote {
  border-left: 4px solid var(--accent);
  background-color: var(--bg-element);
  padding: 0.75rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: 0 8px 8px 0;
  font-style: italic;
  color: var(--text-secondary);
}

.preview-container code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background-color: var(--bg-element);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  color: var(--accent);
}

.preview-container pre {
  background-color: var(--bg-element);
  border-radius: 8px;
  padding: 1.25rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--border-color);
}

.preview-container pre code {
  background-color: transparent;
  padding: 0;
  color: inherit;
  font-size: 0.9rem;
}

.preview-container img {
  max-width: 100%;
  border-radius: 8px;
  box-shadow: var(--shadow-md);
  margin: 1.5rem 0;
}

.preview-container table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

.preview-container th,
.preview-container td {
  border: 1px solid var(--border-color);
  padding: 0.75rem 1rem;
  text-align: left;
}

.preview-container th {
  background-color: var(--bg-element);
  font-weight: 600;
  color: var(--text-primary);
}

.preview-container tr:nth-child(even) {
  background-color: var(--bg-surface);
}

.preview-container hr {
  height: 2px;
  background-color: var(--border-color);
  border: none;
  margin: 2rem 0;
}

.preview-container input[type="checkbox"] {
  margin-right: 0.5rem;
}

/* Status Bar */
.status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 2rem;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  font-size: 0.75rem;
  color: var(--text-muted);
  z-index: 10;
  transition: var(--transition);
}

.status-item {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.badge {
  background-color: var(--bg-element);
  color: var(--text-secondary);
  padding: 0.15rem 0.5rem;
  border-radius: 12px;
  font-weight: 500;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

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

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

/* Responsive adjustment */
@media (max-width: 768px) {
  .workspace {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr 1fr;
  }
  .panel:first-child {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  header {
    padding: 1rem;
  }
}