/* CSS Variables for Themes */
:root {
  --bg-main: #0f172a;
  --bg-card: #1e293b;
  --bg-editor: #090d16;
  --bg-toolbar: #131c2e;
  --bg-hover: #334155;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-secondary: #06b6d4;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #06b6d4 100%);
  
  --border-color: #334155;
  --border-light: #1e293b;
  
  /* JSON Syntax Colors */
  --json-key: #38bdf8;
  --json-string: #4ade80;
  --json-number: #fbbf24;
  --json-boolean: #f472b6;
  --json-null: #a78bfa;
  --json-bracket: #cbd5e1;
  
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.15);
  --warning: #f59e0b;
  --warning-hover: #d97706;
  --success: #10b981;
  
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Fira Code', monospace;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.25);
}

.light-theme {
  --bg-main: #f1f5f9;
  --bg-card: #ffffff;
  --bg-editor: #f8fafc;
  --bg-toolbar: #ffffff;
  --bg-hover: #e2e8f0;
  
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-dim: #94a3b8;
  
  --border-color: #cbd5e1;
  --border-light: #e2e8f0;
  
  --json-key: #0284c7;
  --json-string: #16a34a;
  --json-number: #d97706;
  --json-boolean: #db2777;
  --json-null: #7c3aed;
  --json-bracket: #334155;
  
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.15);
}

/* Reset & Global Base */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Header Styling */
.app-header {
  height: 60px;
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  box-shadow: var(--shadow-sm);
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: var(--accent-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
  box-shadow: var(--shadow-glow);
}

.brand-text h1 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge-tag {
  font-size: 0.65rem;
  padding: 2px 6px;
  background: var(--accent-primary);
  color: #fff;
  border-radius: 4px;
  font-weight: 600;
  text-transform: uppercase;
}

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

/* Security Badge */
.security-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #10b981;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: help;
  transition: all 0.2s ease;
}

.security-badge:hover {
  background-color: rgba(16, 185, 129, 0.2);
  transform: translateY(-1px);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Toolbar Styling */
.toolbar {
  height: 52px;
  background-color: var(--bg-toolbar);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 0 20px;
  overflow-x: auto;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.toolbar-group i {
  color: var(--accent-secondary);
}

.custom-select {
  background-color: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-family: inherit;
  outline: none;
  cursor: pointer;
  transition: border-color 0.2s ease;
}

.custom-select:focus {
  border-color: var(--accent-primary);
}

.checkboxes {
  gap: 16px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  user-select: none;
}

.checkbox-label input {
  display: none;
}

.custom-checkbox {
  width: 16px;
  height: 16px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.checkbox-label input:checked + .custom-checkbox {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
}

.checkbox-label input:checked + .custom-checkbox::after {
  content: '\f00c';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  color: #fff;
  font-size: 0.65rem;
}

.toolbar-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Button Components */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-sm {
  padding: 5px 10px;
  font-size: 0.8rem;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

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

.btn-warning {
  background-color: var(--warning);
  color: #fff;
}

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

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}

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

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-toolbar);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

.icon-tool-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 4px 8px;
  border-radius: 4px;
}

.icon-tool-btn:hover {
  color: var(--text-main);
  background-color: var(--bg-hover);
}

.file-upload-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  transition: all 0.2s ease;
}

.file-upload-btn:hover {
  color: var(--text-main);
  background-color: var(--bg-hover);
}

.file-upload-btn input[type="file"] {
  display: none;
}

/* Main Split View Layout */
.main-container {
  flex: 1;
  display: flex;
  overflow: hidden;
  position: relative;
}

.panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-card);
  min-width: 280px;
  overflow: hidden;
}

.panel-header {
  height: 42px;
  background-color: var(--bg-toolbar);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
}

.panel-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.char-count {
  font-size: 0.75rem;
  color: var(--text-dim);
  font-weight: 400;
  margin-left: 6px;
}

.panel-tools {
  display: flex;
  align-items: center;
  gap: 8px;
}

.panel-divider {
  width: 6px;
  background-color: var(--bg-main);
  border-left: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  cursor: col-resize;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease;
}

.panel-divider:hover, .panel-divider.dragging {
  background-color: var(--accent-primary);
}

.divider-handle {
  width: 2px;
  height: 24px;
  background-color: var(--text-dim);
  border-radius: 1px;
}

/* Editor Wrapper */
.editor-wrapper {
  flex: 1;
  display: flex;
  background-color: var(--bg-editor);
  overflow: hidden;
  position: relative;
}

.line-numbers {
  width: 44px;
  padding: 14px 8px;
  background-color: rgba(0, 0, 0, 0.2);
  border-right: 1px solid var(--border-color);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  text-align: right;
  user-select: none;
  overflow: hidden;
}

textarea#jsonInput {
  flex: 1;
  background: transparent;
  color: var(--text-main);
  border: none;
  outline: none;
  padding: 14px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  resize: none;
  white-space: pre;
  tab-size: 2;
  overflow-y: auto;
}

.highlighted-output {
  flex: 1;
  padding: 14px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* Error Banner */
.error-banner {
  background-color: var(--danger-bg);
  color: var(--danger);
  border-top: 1px solid rgba(239, 68, 68, 0.3);
  padding: 10px 16px;
  font-size: 0.825rem;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  animation: slideUp 0.2s ease;
}

@keyframes slideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

.hidden {
  display: none !important;
}

/* Tabs */
.panel-tabs {
  display: flex;
  gap: 2px;
  height: 100%;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0 14px;
  font-size: 0.825rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  border-bottom: 2px solid transparent;
  transition: all 0.2s ease;
}

.tab-btn:hover {
  color: var(--text-main);
}

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

.panel-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.tab-content {
  display: none;
  flex: 1;
  overflow: hidden;
}

.tab-content.active {
  display: flex;
  flex-direction: column;
}

/* Syntax Highlighting */
.json-key { color: var(--json-key); font-weight: 600; }
.json-string { color: var(--json-string); }
.json-number { color: var(--json-number); }
.json-boolean { color: var(--json-boolean); font-weight: 600; }
.json-null { color: var(--json-null); font-style: italic; }
.json-bracket { color: var(--json-bracket); }

/* Interactive Tree View */
.tree-controls {
  padding: 8px 16px;
  background-color: var(--bg-toolbar);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  gap: 12px;
}

.btn-text {
  background: none;
  border: none;
  color: var(--accent-secondary);
  font-size: 0.8rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
}

.btn-text:hover {
  text-decoration: underline;
}

.tree-container {
  flex: 1;
  padding: 16px;
  overflow: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
}

.tree-node {
  margin-left: 18px;
}

.tree-item {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  padding: 2px 4px;
  border-radius: 4px;
}

.tree-item:hover {
  background-color: var(--bg-hover);
}

.toggle-icon {
  width: 16px;
  cursor: pointer;
  color: var(--text-muted);
  user-select: none;
  display: inline-block;
  text-align: center;
  transition: transform 0.2s ease;
}

.toggle-icon.collapsed {
  transform: rotate(-90deg);
}

.tree-badge {
  font-size: 0.7rem;
  padding: 1px 5px;
  background-color: var(--bg-hover);
  color: var(--text-dim);
  border-radius: 10px;
  margin-left: 6px;
}

/* Statistics View */
.stats-container {
  padding: 24px;
  overflow: auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.stat-card {
  background-color: var(--bg-toolbar);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

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

.stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-main);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Search Box */
.search-box {
  display: flex;
  align-items: center;
  gap: 6px;
  background-color: var(--bg-editor);
  border: 1px solid var(--border-color);
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
}

.search-box input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  width: 110px;
}

/* Empty State */
.empty-state {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  gap: 12px;
}

.empty-state i {
  font-size: 2.5rem;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--bg-card);
  border: 1px solid var(--accent-primary);
  color: var(--text-main);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 100;
  animation: fadeInRight 0.3s ease;
}

.toast-icon {
  color: var(--success);
  font-size: 1.2rem;
}

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