styles.css

/* =====================================================
   MARKDOWNELITE - PROFESSIONAL STYLESHEET
   ===================================================== */

/* CSS Variables for Theming */
:root {
    /* Colors - Dark Theme (Default) */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #1c2128;
    --surface: #21262d;
    --surface-hover: #2d333b;
    --border: #30363d;
    --border-muted: #21262d;
    
    /* Text Colors */
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --text-link: #58a6ff;
    
    /* Accent Colors */
    --accent-primary: #58a6ff;
    --accent-secondary: #1f6feb;
    --accent-success: #3fb950;
    --accent-warning: #d29922;
    --accent-danger: #f85149;
    --accent-purple: #a371f7;
    --accent-pink: #f778ba;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-accent: linear-gradient(135deg, #58a6ff 0%, #1f6feb 100%);
    --gradient-success: linear-gradient(135deg, #3fb950 0%, #2ea043 100%);
    --gradient-warm: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15), 0 5px 10px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 40px rgba(0,0,0,0.2);
    --shadow-glow: 0 0 40px rgba(88,166,255,0.2);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-index Scale */
    --z-base: 1;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-overlay: 300;
    --z-modal: 400;
    --z-toast: 500;
}

/* Light Theme Variables */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f6f8fa;
    --bg-tertiary: #ffffff;
    --surface: #ffffff;
    --surface-hover: #f3f4f6;
    --border: #d0d7de;
    --border-muted: #e2e8f0;
    --text-primary: #24292f;
    --text-secondary: #57606a;
    --text-muted: #6e7781;
    --text-link: #0969da;
}

/* =====================================================
   GLOBAL STYLES
   ===================================================== */

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

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

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color var(--transition-base);
}

/* Selection Styles */
::selection {
    background: var(--accent-primary);
    color: white;
}

/* Scrollbar Styles */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: var(--radius-md);
    border: 2px solid var(--bg-secondary);
}

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

/* =====================================================
   ANIMATED BACKGROUND
   ===================================================== */

.animated-bg {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    overflow: hidden;
}

.gradient-overlay {
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    background: radial-gradient(circle at 20% 50%, rgba(88,166,255,0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(163,113,247,0.1) 0%, transparent 50%);
    animation: gradientShift 20s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { transform: rotate(0deg) scale(1); }
    50% { transform: rotate(180deg) scale(1.1); }
}

.floating-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(40px);
    opacity: 0.5;
    animation: float 20s infinite;
}

.shape-1 {
    width: 300px;
    height: 300px;
    background: var(--gradient-accent);
    top: 10%;
    left: 10%;
    animation-duration: 25s;
}

.shape-2 {
    width: 200px;
    height: 200px;
    background: var(--gradient-success);
    top: 60%;
    right: 10%;
    animation-duration: 20s;
    animation-delay: -5s;
}

.shape-3 {
    width: 250px;
    height: 250px;
    background: var(--gradient-warm);
    bottom: 10%;
    left: 50%;
    animation-duration: 30s;
    animation-delay: -10s;
}

.shape-4 {
    width: 150px;
    height: 150px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    top: 40%;
    left: 30%;
    animation-duration: 22s;
    animation-delay: -15s;
}

.shape-5 {
    width: 180px;
    height: 180px;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    top: 70%;
    right: 40%;
    animation-duration: 28s;
    animation-delay: -7s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    25% {
        transform: translate(100px, -100px) rotate(90deg);
    }
    50% {
        transform: translate(-100px, 100px) rotate(180deg);
    }
    75% {
        transform: translate(-50px, -50px) rotate(270deg);
    }
}

/* =====================================================
   NAVIGATION BAR
   ===================================================== */

.navbar {
    position: sticky;
    top: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: var(--space-md) 0;
    z-index: var(--z-sticky);
    backdrop-filter: blur(10px);
    background: rgba(22, 27, 34, 0.9);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-brand i {
    color: var(--accent-primary);
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    gap: var(--space-md);
}

.nav-item {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.nav-item:hover {
    background: var(--surface);
    color: var(--text-primary);
    border-color: var(--border);
}

.theme-toggle {
    width: 40px;
    height: 40px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
}

/* =====================================================
   HERO SECTION
   ===================================================== */

.hero-section {
    padding: var(--space-3xl) var(--space-xl);
    text-align: center;
    max-width: 1000px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
}

.gradient-text {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-2xl);
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.stat-item i {
    color: var(--accent-primary);
    font-size: 1.125rem;
}

/* =====================================================
   MAIN APPLICATION LAYOUT
   ===================================================== */

.app-main {
    padding: 0 var(--space-xl) var(--space-3xl);
}

.app-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    min-height: 70vh;
}

@media (max-width: 1024px) {
    .app-container {
        grid-template-columns: 1fr;
    }
}

/* =====================================================
   PANELS
   ===================================================== */

.panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.panel:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.panel-header {
    background: var(--bg-tertiary);
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-title {
    font-size: 1.125rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.panel-title i {
    color: var(--accent-primary);
}

.panel-actions {
    display: flex;
    gap: var(--space-xs);
}

.action-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

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

/* =====================================================
   EDITOR CONTAINER
   ===================================================== */

.editor-container {
    flex: 1;
    display: flex;
    position: relative;
    background: var(--bg-primary);
}

.line-numbers {
    width: 50px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    padding: var(--space-lg) 0;
    text-align: right;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.714;
    user-select: none;
    overflow-y: hidden;
}

.markdown-editor {
    flex: 1;
    background: var(--bg-primary);
    color: var(--text-primary);
    border: none;
    outline: none;
    padding: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.714;
    resize: none;
}

/* =====================================================
   PREVIEW CONTAINER
   ===================================================== */

.preview-container {
    flex: 1;
    overflow-y: auto;
    background: var(--bg-primary);
}

.preview-content {
    padding: var(--space-2xl);
    min-height: 400px;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    color: var(--text-muted);
    text-align: center;
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: var(--space-lg);
    color: var(--border);
}

.empty-state h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
}

.html-content {
    padding: var(--space-lg);
    background: var(--bg-primary);
    height: 100%;
    overflow: auto;
}

.html-content pre {
    margin: 0;
    background: transparent !important;
}

.html-content code {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.5;
}

/* =====================================================
   PANEL FOOTER
   ===================================================== */

.panel-footer {
    background: var(--bg-tertiary);
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-info {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.status-indicator i {
    font-size: 0.5rem;
    color: var(--accent-success);
}

/* =====================================================
   BUTTONS
   ===================================================== */

.convert-btn {
    position: relative;
    background: var(--gradient-accent);
    color: white;
    border: none;
    padding: var(--space-sm) var(--space-xl);
    border-radius: var(--radius-full);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    overflow: hidden;
    transition: all var(--transition-base);
}

.convert-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(88,166,255,0.3);
}

.btn-shine {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.convert-btn:hover .btn-shine {
    left: 100%;
}

.export-options {
    display: flex;
    gap: var(--space-sm);
}

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

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

/* =====================================================
   MODALS
   ===================================================== */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    backdrop-filter: blur(5px);
    animation: fadeIn var(--transition-base);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    max-width: 800px;
    width: 90%;
    max-height: 80vh;
    overflow: hidden;
    animation: slideUp var(--transition-base);
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    background: var(--bg-tertiary);
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
}

.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--accent-danger);
    color: white;
    border-color: var(--accent-danger);
}

.modal-body {
    padding: var(--space-xl);
    overflow-y: auto;
    max-height: calc(80vh - 100px);
}

/* =====================================================
   FEATURES GRID
   ===================================================== */

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
}

.feature-card {
    background: var(--surface);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 2rem;
    color: var(--accent-primary);
    margin-bottom: var(--space-md);
}

.feature-card h3 {
    font-size: 1.125rem;
    margin-bottom: var(--space-sm);
}

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

/* =====================================================
   GUIDE TABLE
   ===================================================== */

.guide-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.guide-table th {
    background: var(--bg-tertiary);
    padding: var(--space-md);
    text-align: left;
    font-weight: 600;
    border-bottom: 1px solid var(--border);
}

.guide-table td {
    padding: var(--space-md);
    border-bottom: 1px solid var(--border);
}

.guide-table tbody tr:last-child td {
    border-bottom: none;
}

.guide-table tbody tr:hover {
    background: var(--surface-hover);
}

/* =====================================================
   TOAST NOTIFICATIONS
   ===================================================== */

.toast-container {
    position: fixed;
    top: var(--space-xl);
    right: var(--space-xl);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.toast {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-md) var(--space-lg);
    min-width: 300px;
    display: flex;
    align-items: center;
    gap: var(--space-md);
    box-shadow: var(--shadow-lg);
    animation: slideInRight var(--transition-base);
}

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

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

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

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

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

/* =====================================================
   MARKDOWN CONTENT STYLES (PREVIEW)
   ===================================================== */

.preview-content h1,
.preview-content h2,
.preview-content h3,
.preview-content h4,
.preview-content h5,
.preview-content h6 {
    color: var(--text-primary);
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
    font-weight: 700;
    line-height: 1.3;
}

.preview-content h1 {
    font-size: 2.5rem;
    padding-bottom: var(--space-md);
    border-bottom: 2px solid var(--border);
}

.preview-content h2 {
    font-size: 2rem;
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--border);
}

.preview-content h3 {
    font-size: 1.5rem;
    color: var(--accent-primary);
}

.preview-content h4 {
    font-size: 1.25rem;
}

.preview-content h5 {
    font-size: 1.125rem;
}

.preview-content h6 {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.preview-content p {
    margin-bottom: var(--space-lg);
    line-height: 1.8;
}

.preview-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

.preview-content em {
    font-style: italic;
}

.preview-content a {
    color: var(--accent-primary);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-fast);
}

.preview-content a:hover {
    border-bottom-color: var(--accent-primary);
}

.preview-content ul,
.preview-content ol {
    margin-bottom: var(--space-lg);
    padding-left: var(--space-xl);
}

.preview-content ul {
    list-style: none;
}

.preview-content ul li {
    position: relative;
    padding-left: var(--space-lg);
    margin-bottom: var(--space-sm);
}

.preview-content ul li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: bold;
}

.preview-content ol {
    counter-reset: item;
    list-style: none;
}

.preview-content ol li {
    position: relative;
    padding-left: var(--space-2xl);
    margin-bottom: var(--space-sm);
    counter-increment: item;
}

.preview-content ol li::before {
    content: counter(item);
    position: absolute;
    left: 0;
    top: 0.125rem;
    background: var(--accent-primary);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: bold;
}

.preview-content blockquote {
    margin: var(--space-xl) 0;
    padding: var(--space-lg);
    background: linear-gradient(135deg, rgba(88,166,255,0.1) 0%, rgba(31,111,235,0.1) 100%);
    border-left: 4px solid var(--accent-primary);
    border-radius: var(--radius-md);
    font-style: italic;
}

.preview-content table {
    width: 100%;
    margin: var(--space-xl) 0;
    border-collapse: separate;
    border-spacing: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.preview-content th {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-weight: 600;
    text-align: left;
    padding: var(--space-md);
    border-bottom: 2px solid var(--border);
}

.preview-content td {
    padding: var(--space-md);
    border-bottom: 1px solid var(--border);
}

.preview-content tbody tr:last-child td {
    border-bottom: none;
}

.preview-content tbody tr:hover {
    background: var(--surface-hover);
}

.preview-content hr {
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
    margin: var(--space-2xl) 0;
}

.preview-content code:not([class*="language-"]) {
    background: var(--surface);
    color: var(--accent-warning);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.875em;
    border: 1px solid var(--border);
}

.preview-content pre {
    margin: var(--space-xl) 0;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow-x: auto;
}

.preview-content pre code {
    display: block;
    padding: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.5;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 var(--space-md);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .app-main {
        padding: 0 var(--space-md) var(--space-2xl);
    }
    
    .panel {
        min-height: 400px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .toast-container {
        right: var(--space-md);
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .navbar,
    .hero-section,
    .input-panel,
    .panel-header,
    .panel-footer,
    .modal,
    .toast-container,
    .animated-bg {
        display: none !important;
    }
    
    .app-container {
        display: block;
    }
    
    .output-panel {
        border: none;
        box-shadow: none;
    }
    
    .preview-content {
        padding: 0;
    }
}