/**
 * ProtoStruct - Advanced JSON-to-Protobuf Architect
 * Engineering Dark Mode Aesthetic
 */

:root {
    /* Core Colors - Deep Technical Palette */
    --color-bg-primary: #0a0e14;
    --color-bg-secondary: #111418;
    --color-bg-tertiary: #161a20;
    --color-bg-elevated: #1a1f26;
    
    /* Surface Colors */
    --color-surface: #1a1f26;
    --color-surface-hover: #222831;
    --color-surface-active: #2a3138;
    
    /* Border Colors */
    --color-border: #2a3138;
    --color-border-subtle: #1f252c;
    --color-border-accent: #3a4552;
    
    /* Text Colors */
    --color-text-primary: #e6edf3;
    --color-text-secondary: #8b949e;
    --color-text-tertiary: #6e7681;
    --color-text-muted: #484f58;
    
    /* Accent Colors */
    --color-accent-primary: #58a6ff;
    --color-accent-secondary: #1f6feb;
    --color-accent-hover: #388bfd;
    
    /* Semantic Colors */
    --color-success: #3fb950;
    --color-success-bg: rgba(63, 185, 80, 0.1);
    --color-warning: #d29922;
    --color-warning-bg: rgba(210, 153, 34, 0.1);
    --color-error: #f85149;
    --color-error-bg: rgba(248, 81, 73, 0.1);
    --color-info: #58a6ff;
    --color-info-bg: rgba(88, 166, 255, 0.1);
    
    /* Syntax Highlighting */
    --color-syntax-keyword: #ff7b72;
    --color-syntax-type: #79c0ff;
    --color-syntax-string: #a5d6ff;
    --color-syntax-number: #79c0ff;
    --color-syntax-comment: #8b949e;
    --color-syntax-well-known: #ffa657;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.6);
    
    /* Typography */
    --font-display: 'Epilogue', -apple-system, system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Monaco', 'Consolas', monospace;
    
    /* 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);
}

/* ============================================================================
   Reset & Base Styles
   ============================================================================ */

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

html, body {
    height: 100%;
    overflow-x: hidden;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* ============================================================================
   LIDA HEADER
   ============================================================================ */

.lida-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 30px;
    text-align: center;
    border-bottom: 3px solid rgba(255, 255, 255, 0.1);
    width: 100%;
    max-width: 1600px;
    border-radius: 16px 16px 0 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.lida-logo-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 15px;
}

.lida-logo {
    width: 65px;
    height: auto;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.3));
}

.lida-brand-name {
    font-size: 32px;
    font-weight: 700;
    color: white;
    letter-spacing: -0.5px;
}

.lida-brand-tagline {
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 15px;
}

.lida-tool-title {
    color: white;
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.lida-tool-subtitle {
    color: rgba(255, 255, 255, 0.85);
    font-size: 15px;
    font-weight: 500;
}

/* ============================================================================
   SHARE SECTION
   ============================================================================ */

.share-section {
    text-align: center;
    padding: 20px;
    background: #1a1a1a;
    width: 100%;
    max-width: 1600px;
}

.share-mobile-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: none;
    gap: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: all 0.2s ease;
}

.share-mobile-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

.share-desktop-btns {
    display: none;
    gap: 12px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.share-label {
    color: #888;
    font-size: 14px;
}

.share-btn {
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
}

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

.share-btn-facebook { background: #1877f2; }
.share-btn-linkedin { background: #0077b5; }
.share-btn-twitter { background: #14171a; }
.share-btn-copy { background: #555; }
.share-icon { width: 16px; height: 16px; }

/* ============================================================================
   Main Container
   ============================================================================ */

.app-container {
    background: #1a1a1a;
    border-radius: 0 0 16px 16px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.4);
    max-width: 1600px;
    width: 100%;
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============================================================================
   Header
   ============================================================================ */

.app-header {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.app-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(
        90deg,
        transparent,
        var(--color-accent-primary) 20%,
        var(--color-accent-primary) 80%,
        transparent
    );
    opacity: 0.5;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-xl);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.logo-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border-accent);
    border-radius: var(--radius-md);
    color: var(--color-accent-primary);
}

.logo-text h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
}

.logo-text .tagline {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    font-weight: 400;
}

.header-stats {
    display: flex;
    gap: var(--space-xl);
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.stat-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-tertiary);
    font-weight: 600;
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-text-primary);
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

.stat-value.status-ready {
    color: var(--color-success);
    border-color: var(--color-success);
    background: var(--color-success-bg);
}

/* ============================================================================
   Configuration Panel
   ============================================================================ */

.config-panel {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
}

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

.config-item label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

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

.config-item input[type="text"],
.config-item select {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.config-item input[type="text"]:focus,
.config-item select:focus {
    outline: none;
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.1);
}

.config-item input[type="text"]::placeholder {
    color: var(--color-text-muted);
}

.checkbox-item label {
    cursor: pointer;
    user-select: none;
}

.config-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--color-accent-primary);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

/* Feature Badges */
.feature-badges {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--space-md);
}

.badge {
    padding: var(--space-xs) var(--space-md);
    background: rgba(255, 255, 255, 0.15);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    color: white;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Config Header */
.config-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
}

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

.config-actions {
    display: flex;
    gap: var(--space-sm);
}

.btn-text {
    background: transparent;
    border: none;
    color: var(--color-accent-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.btn-text:hover {
    background: var(--color-bg-tertiary);
}

/* Tooltip */
.tooltip-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-bg-tertiary);
    color: var(--color-text-tertiary);
    font-size: 11px;
    cursor: help;
    margin-left: var(--space-xs);
}

.tooltip-icon:hover {
    background: var(--color-accent-primary);
    color: white;
}

/* Advanced Options Toggle */
.config-advanced {
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.toggle-advanced {
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    width: 100%;
    justify-content: center;
}

.toggle-advanced:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.toggle-icon {
    transition: transform var(--transition-fast);
}

.toggle-advanced.active .toggle-icon {
    transform: rotate(180deg);
}

.advanced-options {
    margin-top: var(--space-md);
    animation: slideDown var(--transition-base);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Header Actions */
.header-actions {
    display: flex;
    gap: var(--space-sm);
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border-accent);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.btn-icon svg {
    flex-shrink: 0;
}

/* ============================================================================
   Workspace (Main Panels)
   ============================================================================ */

.workspace {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    flex: 1;
}

.panel {
    display: flex;
    flex-direction: column;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

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

.panel-header h2 {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    letter-spacing: -0.01em;
}

.panel-icon {
    font-size: 1.25rem;
    opacity: 0.8;
}

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

.panel-body {
    flex: 1;
    overflow: hidden;
    position: relative;
}

.panel-footer {
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg-tertiary);
    border-top: 1px solid var(--color-border);
}

/* ============================================================================
   Editor Container
   ============================================================================ */

.editor-container {
    display: flex;
    height: 100%;
    position: relative;
}

.line-numbers {
    padding: var(--space-lg) var(--space-sm);
    background: var(--color-bg-tertiary);
    border-right: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    text-align: right;
    user-select: none;
    min-width: 50px;
    overflow-y: hidden;
    white-space: pre;
}

.code-editor {
    flex: 1;
    padding: var(--space-lg);
    background: var(--color-bg-secondary);
    border: none;
    color: var(--color-text-primary);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    resize: none;
    outline: none;
    overflow-y: auto;
    tab-size: 2;
}

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

/* Custom Scrollbar */
.code-editor::-webkit-scrollbar,
.code-output::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

.code-editor::-webkit-scrollbar-track,
.code-output::-webkit-scrollbar-track {
    background: var(--color-bg-tertiary);
}

.code-editor::-webkit-scrollbar-thumb,
.code-output::-webkit-scrollbar-thumb {
    background: var(--color-border-accent);
    border-radius: 6px;
    border: 2px solid var(--color-bg-tertiary);
}

.code-editor::-webkit-scrollbar-thumb:hover,
.code-output::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* ============================================================================
   Code Output
   ============================================================================ */

.code-output {
    height: 100%;
    padding: var(--space-lg);
    overflow: auto;
    background: var(--color-bg-secondary);
}

.code-output code {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--color-text-primary);
    white-space: pre;
    display: block;
}

.code-output code.error {
    color: var(--color-error);
}

/* Syntax Highlighting */
.keyword {
    color: var(--color-syntax-keyword);
    font-weight: 500;
}

.type {
    color: var(--color-syntax-type);
}

.well-known-type {
    color: var(--color-syntax-well-known);
    font-weight: 500;
}

.string {
    color: var(--color-syntax-string);
}

.number {
    color: var(--color-syntax-number);
}

.comment {
    color: var(--color-syntax-comment);
    font-style: italic;
}

/* ============================================================================
   Buttons
   ============================================================================ */

.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: 1px solid;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--color-surface-hover);
    border-color: var(--color-accent-primary);
}

.btn-primary:disabled,
.btn-secondary:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-primary svg,
.btn-secondary svg {
    width: 16px;
    height: 16px;
}

/* ============================================================================
   Info Badges
   ============================================================================ */

.info-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.info-badge.success {
    background: var(--color-success-bg);
    border-color: var(--color-success);
    color: var(--color-success);
}

.info-badge.error {
    background: var(--color-error-bg);
    border-color: var(--color-error);
    color: var(--color-error);
}

.info-badge svg {
    width: 14px;
    height: 14px;
}

/* ============================================================================
   Analysis Panel
   ============================================================================ */

.analysis-panel {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    opacity: 0;
    transform: translateY(10px);
    transition: all var(--transition-base);
}

.analysis-panel.visible {
    opacity: 1;
    transform: translateY(0);
}

.analysis-header {
    margin-bottom: var(--space-lg);
}

.analysis-header h3 {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.analysis-header svg {
    color: var(--color-accent-primary);
}

.analysis-content {
    display: grid;
    gap: var(--space-md);
}

.insight-item {
    padding: var(--space-md);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-left: 3px solid;
    border-radius: var(--radius-md);
}

.insight-item.info {
    border-left-color: var(--color-info);
    background: var(--color-info-bg);
}

.insight-item.success {
    border-left-color: var(--color-success);
    background: var(--color-success-bg);
}

.insight-item.warning {
    border-left-color: var(--color-warning);
    background: var(--color-warning-bg);
}

.insight-item.error {
    border-left-color: var(--color-error);
    background: var(--color-error-bg);
}

.insight-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
    font-weight: 600;
    color: var(--color-text-primary);
}

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

.insight-body {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    white-space: pre-line;
}

/* ============================================================================
   LIDA FOOTER
   ============================================================================ */

.lida-footer {
    padding: 50px 20px;
    text-align: center;
    margin-top: 60px;
    width: 100%;
    max-width: 1600px;
    position: relative;
}

.lida-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #667eea, #764ba2, #667eea);
    animation: shimmer 3s infinite linear;
}

@keyframes shimmer {
    0% { background-position: -200px 0; }
    100% { background-position: 200px 0; }
}

.lida-footer-content {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 25px;
}

.lida-footer-copyright {
    font-size: 22px;
    color: #000000;
    font-weight: 700;
    -webkit-background-clip: text;
}

.lida-footer-version {
    font-size: 16px;
    color: #fff;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    border: 1px solid rgba(102, 126, 234, 0.2);
}

.lida-footer-heart {
    color: #ff6b6b;
    animation: heartbeat 1.5s infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}

.lida-btn-discover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 700;
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.3s ease;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
    position: relative;
    overflow: hidden;
}

.lida-btn-discover::before {
    content: '';
    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;
}

.lida-btn-discover:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(102, 126, 234, 0.6);
}

.lida-btn-discover:hover::before {
    left: 100%;
}

.lida-footer-bottom {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    width: 100%;
}

.lida-footer-bottom-text {
    color: #fff;
    font-size: 12px;
    opacity: 0.8;
}

/* ============================================================================
   Toast Notifications
   ============================================================================ */

.toast {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    z-index: 1000;
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-base);
    pointer-events: none;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.toast-content {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-accent);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    color: var(--color-text-primary);
    font-size: 0.875rem;
    font-weight: 500;
}

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

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

.toast-icon {
    flex-shrink: 0;
}

/* ============================================================================
   Responsive Design
   ============================================================================ */

@media (max-width: 1200px) {
    .workspace {
        grid-template-columns: 1fr;
    }
    
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Footer Stats */
.footer-stats {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

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

.stats-inline {
    display: flex;
    gap: var(--space-md);
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
}

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-arrow {
    margin-left: var(--space-xs);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 4px);
    right: 0;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border-accent);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    min-width: 220px;
    z-index: 100;
    display: none;
    animation: dropdownFade var(--transition-fast);
}

@keyframes dropdownFade {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dropdown-menu.show {
    display: block;
}

.dropdown-item {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: none;
    color: var(--color-text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.dropdown-item:hover {
    background: var(--color-surface-hover);
}

.dropdown-item:first-child {
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.dropdown-item:last-child {
    border-radius: 0 0 var(--radius-md) var(--radius-md);
}

/* Customization Panel */
.customization-panel {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    opacity: 0;
    transform: translateY(10px);
    transition: all var(--transition-base);
}

.customization-panel[style*="display: block"],
.customization-panel[style*="display: flex"] {
    opacity: 1;
    transform: translateY(0);
}

.panel-header-custom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
}

.panel-header-custom h3 {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.customization-content {
    min-height: 100px;
}

.customize-hint {
    text-align: center;
    color: var(--color-text-tertiary);
    font-size: 0.875rem;
    padding: var(--space-xl);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
    animation: fadeIn var(--transition-base);
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-accent);
    border-radius: var(--radius-xl);
    max-width: 800px;
    width: 100%;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-xl);
    animation: slideUp var(--transition-base);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

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

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

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

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

.modal-body {
    padding: var(--space-xl);
    overflow-y: auto;
    flex: 1;
}

/* Templates Grid */
.templates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--space-lg);
}

.template-card {
    padding: var(--space-lg);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.template-card:hover {
    border-color: var(--color-accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.template-card h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-sm);
}

.template-card p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* Shortcuts List */
.shortcuts-list {
    display: grid;
    gap: var(--space-md);
}

.shortcut-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.shortcut-item span {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

kbd {
    display: inline-block;
    padding: 4px 8px;
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border-accent);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-primary);
    box-shadow: 0 2px 0 var(--color-border);
    margin: 0 2px;
}

/* Validation Modal */
.validation-modal-content {
    max-width: 900px;
}

.validation-summary {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-xl);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-lg);
    border: 2px solid;
}

.validation-summary.valid {
    border-color: var(--color-success);
    background: var(--color-success-bg);
}

.validation-summary.invalid {
    border-color: var(--color-error);
    background: var(--color-error-bg);
}

.validation-summary-icon {
    font-size: 3rem;
    line-height: 1;
}

.validation-summary-text h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-sm);
}

.validation-stats {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.validation-stats span {
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.stat-error {
    background: var(--color-error-bg);
    color: var(--color-error);
    border: 1px solid var(--color-error);
}

.stat-warning {
    background: var(--color-warning-bg);
    color: var(--color-warning);
    border: 1px solid var(--color-warning);
}

.stat-info {
    background: var(--color-info-bg);
    color: var(--color-info);
    border: 1px solid var(--color-info);
}

.validation-section {
    margin-bottom: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    border-left: 3px solid;
}

.error-section {
    border-left-color: var(--color-error);
}

.warning-section {
    border-left-color: var(--color-warning);
}

.info-section {
    border-left-color: var(--color-info);
}

.validation-section h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
}

.validation-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.validation-list li {
    padding: var(--space-sm) var(--space-md);
    margin-bottom: var(--space-sm);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

.validation-list li:last-child {
    margin-bottom: 0;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-sm);
    padding: var(--space-lg) var(--space-xl);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-tertiary);
}

/* ============================================================================
   Field Customization Styles
   ============================================================================ */

.customization-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.customization-intro {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    background: var(--color-info-bg);
    border: 1px solid var(--color-info);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
}

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

.message-customization {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.message-header-custom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border);
}

.message-header-custom h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.field-count {
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    background: var(--color-bg-secondary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
}

.fields-table {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.fields-row {
    display: grid;
    grid-template-columns: 2fr 2fr 1fr 1.5fr 80px;
    gap: var(--space-sm);
    align-items: center;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast);
}

.fields-row:not(.fields-header):hover {
    background: var(--color-bg-secondary);
}

.fields-header {
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-tertiary);
    background: transparent;
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-border);
}

.field-col {
    min-width: 0;
}

.field-col-actions {
    display: flex;
    justify-content: center;
}

.field-input {
    width: 100%;
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.field-input:focus {
    outline: none;
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.1);
}

.field-input[type="number"] {
    text-align: center;
}

.btn-icon-small {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    padding: var(--space-xs);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon-small:hover {
    background: var(--color-error-bg);
    border-color: var(--color-error);
    color: var(--color-error);
}

.add-field-btn {
    margin-top: var(--space-md);
    text-align: center;
    width: 100%;
    padding: var(--space-sm);
    background: var(--color-bg-secondary);
    border: 1px dashed var(--color-border-accent);
    border-radius: var(--radius-md);
    color: var(--color-accent-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.add-field-btn:hover {
    background: var(--color-bg-elevated);
    border-color: var(--color-accent-primary);
    border-style: solid;
}

@media (max-width: 768px) {
    body {
        padding: 20px 15px;
    }
    
    .lida-header {
        padding: 20px 15px;
        border-radius: 12px 12px 0 0;
    }
    
    .lida-brand-name {
        font-size: 24px;
    }
    
    .lida-tool-title {
        font-size: 20px;
    }
    
    .share-section {
        padding: 15px;
    }
    
    .app-container {
        padding: var(--space-md);
        gap: var(--space-md);
        border-radius: 0 0 12px 12px;
    }
    
    .feature-badges {
        flex-direction: column;
        align-items: center;
    }
    
    .header-actions {
        flex-wrap: wrap;
    }
    
    .btn-icon span {
        display: none;
    }
    
    .lida-footer {
        padding: 40px 15px;
    }
    
    .lida-footer-copyright {
        font-size: 18px;
    }
    
    .lida-footer-version {
        font-size: 14px;
    }
    
    .lida-btn-discover {
        padding: 14px 24px;
        font-size: 14px;
    }
    
    .validation-summary {
        flex-direction: column;
        text-align: center;
    }
    
    .modal-footer {
        flex-direction: column;
    }
    
    .modal-footer button {
        width: 100%;
    }
}