/* -------------------------------------------------------------
   XSS PLAYGROUND - HIGH FIDELITY CYBERPUNK DESIGN SYSTEM
------------------------------------------------------------- */

:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', Courier, monospace;

  /* Color Palette - Cyber / Futuristic Dark Theme */
  --bg-main: #080c14;
  --bg-sidebar: #0e1321;
  --bg-card: rgba(18, 25, 41, 0.6);
  --bg-card-hover: rgba(26, 36, 59, 0.75);
  --bg-input: #121929;
  
  --border-color: rgba(255, 255, 255, 0.05);
  --border-active: rgba(6, 182, 212, 0.35);
  
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dark: #0f172a;

  /* Accents */
  --accent-cyan: #06b6d4;
  --accent-blue: #3b82f6;
  --accent-purple: #8b5cf6;
  --accent-indigo: #6366f1;
  
  /* Status Colors */
  --color-danger: #f43f5e;
  --color-success: #10b981;
  --color-warning: #f59e0b;

  /* Gradients */
  --grad-cyan-blue: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --grad-purple-pink: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
  --grad-indigo-purple: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --grad-danger: linear-gradient(135deg, #f43f5e 0%, #be123c 100%);
  --grad-success: linear-gradient(135deg, #10b981 0%, #047857 100%);
  --grad-dark: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);

  /* Shadow & Glow */
  --shadow-lg: 0 10px 30px -5px rgba(0, 0, 0, 0.7), 0 8px 12px -6px rgba(0, 0, 0, 0.7);
  --shadow-glow-cyan: 0 0 15px rgba(6, 182, 212, 0.25);
  --shadow-glow-purple: 0 0 15px rgba(139, 92, 246, 0.25);
  --shadow-glow-danger: 0 0 15px rgba(244, 63, 94, 0.25);
  --shadow-glow-success: 0 0 15px rgba(16, 185, 129, 0.25);
  --glass-blur: blur(16px);

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Styles & Resets */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.05) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(6, 182, 212, 0.05) 0px, transparent 50%);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  overflow-x: hidden;
  line-height: 1.5;
}

/* Scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.06);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* Layout Container */
.layout-container {
  display: flex;
  width: 100vw;
  min-height: 100vh;
}

/* Sidebar Styling */
.sidebar {
  width: 260px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 2.5rem 1.25rem;
  flex-shrink: 0;
  z-index: 10;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 3rem;
  padding-left: 0.5rem;
}

.logo-icon {
  width: 34px;
  height: 34px;
  background: var(--grad-indigo-purple);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #fff;
  font-size: 1.3rem;
  box-shadow: var(--shadow-glow-purple);
}

.logo-text {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  background: var(--grad-cyan-blue);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.nav-item button {
  width: 100%;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  padding: 0.8rem 1rem;
  border-radius: 10px;
  text-align: left;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 550;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: var(--transition-fast);
}

.nav-item button:hover {
  background-color: rgba(255, 255, 255, 0.02);
  color: var(--text-main);
}

.nav-item button svg {
  opacity: 0.6;
  transition: var(--transition-fast);
}

.nav-item button:hover svg {
  opacity: 1;
}

.nav-item.active button {
  background: rgba(99, 102, 241, 0.08);
  color: var(--accent-indigo);
  border-color: rgba(99, 102, 241, 0.2);
}

.nav-item.active button svg {
  color: var(--accent-indigo);
  opacity: 1;
}

.sidebar-footer {
  margin-top: auto;
  padding-top: 2rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
  border-top: 1px solid var(--border-color);
}

/* Main Workspace */
.main-content {
  flex-grow: 1;
  padding: 2.5rem 3.5rem;
  overflow-y: auto;
  max-width: 1400px;
  width: 100%;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.5rem;
}

.header-title h1 {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.25rem;
  background: linear-gradient(to right, var(--text-main), var(--text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header-title p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Global Security Switch */
.security-control {
  display: flex;
  align-items: center;
  gap: 1rem;
  background-color: var(--bg-card);
  padding: 0.65rem 1.25rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  backdrop-filter: var(--glass-blur);
}

.toggle-label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.switch-wrapper {
  position: relative;
  display: inline-block;
  width: 100px;
  height: 34px;
}

.switch-wrapper input {
  opacity: 0;
  width: 0;
  height: 0;
}

.switch {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-danger);
  transition: .4s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.4), var(--shadow-glow-danger);
}

.slider:before {
  position: absolute;
  content: "";
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .4s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 50%;
  box-shadow: 0 2px 5px rgba(0,0,0,0.3);
  z-index: 2;
}

.slider .text-vulnerable,
.slider .text-secure {
  font-size: 0.7rem;
  font-weight: 800;
  color: white;
  text-shadow: 0 1px 2px rgba(0,0,0,0.5);
  user-select: none;
  z-index: 1;
}

.slider .text-secure {
  opacity: 0;
}

.slider .text-vulnerable {
  margin-left: auto;
}

input:checked + .slider {
  background-color: var(--color-success);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.4), var(--shadow-glow-success);
}

input:checked + .slider:before {
  transform: translateX(66px);
}

input:checked + .slider .text-secure {
  opacity: 1;
}

input:checked + .slider .text-vulnerable {
  opacity: 0;
}

/* Tab Routing Systems */
.tab-content {
  display: none;
  animation: tabFadeIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.tab-content.active {
  display: block;
}

@keyframes tabFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Grids and Containers */
.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

@media (max-width: 1024px) {
  .grid-2col {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 2rem;
  backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-lg);
  transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.08);
}

.card h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.7rem;
  font-weight: 800;
  padding: 0.25rem 0.65rem;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-danger {
  background: rgba(244, 63, 94, 0.1);
  color: var(--color-danger);
  border: 1px solid rgba(244, 63, 94, 0.25);
}

.badge-success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
  border: 1px solid rgba(16, 185, 129, 0.25);
}

/* Status Indicators */
.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.65rem 1.25rem;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 2.25rem;
}

.status-indicator.vulnerable {
  background: rgba(244, 63, 94, 0.05);
  border: 1px solid rgba(244, 63, 94, 0.15);
  color: var(--color-danger);
}

.status-indicator.secure {
  background: rgba(16, 185, 129, 0.05);
  border: 1px solid rgba(16, 185, 129, 0.15);
  color: var(--color-success);
}

.indicator-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.vulnerable .indicator-dot {
  background-color: var(--color-danger);
  box-shadow: 0 0 10px var(--color-danger);
  animation: glowPulse 2s infinite;
}

.secure .indicator-dot {
  background-color: var(--color-success);
  box-shadow: 0 0 10px var(--color-success);
}

@keyframes glowPulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(244, 63, 94, 0.6); }
  70% { transform: scale(1.1); box-shadow: 0 0 0 8px rgba(244, 63, 94, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(244, 63, 94, 0); }
}

/* Inputs & Actions */
.sandbox-input-group {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.text-input {
  flex-grow: 1;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.8rem 1.25rem;
  border-radius: 10px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: var(--transition-fast);
}

.text-input:focus {
  outline: none;
  border-color: var(--border-active);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.12);
}

.btn {
  background: var(--grad-cyan-blue);
  color: white;
  border: none;
  padding: 0.8rem 1.5rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  box-shadow: var(--shadow-glow-cyan);
  transition: transform 0.1s, opacity var(--transition-fast), box-shadow var(--transition-fast);
}

.btn:hover {
  opacity: 0.95;
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.4);
}

.btn:active {
  transform: scale(0.97);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  box-shadow: none;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: none;
}

.btn-danger {
  background: var(--grad-danger);
  box-shadow: var(--shadow-glow-danger);
}

.btn-danger:hover {
  box-shadow: 0 0 20px rgba(244, 63, 94, 0.4);
}

.comment-form-group {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.comment-form-group textarea {
  min-height: 90px;
  resize: vertical;
}

.form-actions {
  display: flex;
  gap: 0.75rem;
}

/* Preset Payloads tags */
.preset-payloads {
  margin-top: 1.5rem;
}

.preset-title {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.preset-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.preset-tag {
  background-color: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
  cursor: pointer;
  font-family: var(--font-mono);
  transition: var(--transition-fast);
}

.preset-tag:hover {
  background-color: rgba(6, 182, 212, 0.05);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

/* Output Rendering Window */
.sandbox-output {
  margin-top: 1.75rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1.75rem;
}

.output-header {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  letter-spacing: 0.08em;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.output-window {
  background-color: #03060f;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  min-height: 120px;
  padding: 1.25rem;
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 2px 10px rgba(0,0,0,0.9);
}

.output-window::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  background: linear-gradient(rgba(18, 25, 41, 0) 50%, rgba(0, 0, 0, 0.25) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.03), rgba(0, 255, 0, 0.01), rgba(0, 0, 255, 0.03));
  background-size: 100% 4px, 6px 100%;
  pointer-events: none;
}

.output-container {
  word-break: break-all;
  font-family: var(--font-sans);
  position: relative;
  z-index: 1;
}

/* Comments Wall */
.flex-column {
  display: flex;
  flex-direction: column;
}

.space-between {
  justify-content: space-between;
}

.card-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}

.comments-wall {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-height: 330px;
  overflow-y: auto;
  padding-right: 0.5rem;
  flex-grow: 1;
}

.comment-card {
  background: rgba(255, 255, 255, 0.01);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
  transition: var(--transition-fast);
}

.comment-card:hover {
  border-color: rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.02);
}

.comment-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.65rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  padding-bottom: 0.4rem;
}

.comment-author {
  font-weight: 700;
  color: var(--accent-indigo);
}

.comment-content {
  font-size: 0.95rem;
  word-break: break-word;
}

/* Code Comparison Panels */
.code-comparison-header {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--accent-cyan);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.code-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1rem;
}

.code-tab-btn {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.85rem;
  transition: var(--transition-fast);
}

.code-tab-btn.active {
  color: var(--text-main);
  border-bottom-color: var(--accent-cyan);
}

.code-block-wrapper {
  background: #03060f;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  position: relative;
  overflow: hidden;
}

.code-block-header {
  background: rgba(255, 255, 255, 0.01);
  padding: 0.6rem 1.25rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
}

.copy-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.75rem;
  font-family: var(--font-sans);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

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

pre {
  margin: 0;
  padding: 1.25rem;
  overflow-x: auto;
}

code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #e2e8f0;
  line-height: 1.5;
}

/* Syntax Highlighting */
.hl-keyword { color: #f43f5e; font-weight: 600; }
.hl-string { color: #10b981; }
.hl-comment { color: #64748b; font-style: italic; }
.hl-function { color: #3b82f6; }
.hl-highlight { background-color: rgba(245, 158, 11, 0.15); border-radius: 2px; padding: 0 2px; }
.hl-vuln-bg { background-color: rgba(244, 63, 94, 0.15); border-radius: 2px; padding: 0 2px; }
.hl-secure-bg { background-color: rgba(16, 185, 129, 0.15); border-radius: 2px; padding: 0 2px; }

/* Dashboard UI Styles */
.welcome-hero {
  background: linear-gradient(135deg, rgba(14, 19, 33, 0.85) 0%, rgba(8, 12, 20, 0.95) 100%);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 3.5rem;
  margin-bottom: 3rem;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  backdrop-filter: var(--glass-blur);
}

.welcome-hero::after {
  content: '';
  position: absolute;
  top: -150px;
  right: -150px;
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, rgba(0,0,0,0) 70%);
  pointer-events: none;
}

.welcome-hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.welcome-badge {
  background: rgba(99, 102, 241, 0.1);
  color: #a5b4fc;
  border: 1px solid rgba(99, 102, 241, 0.25);
  font-size: 0.7rem;
  font-weight: 800;
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: inline-block;
  margin-bottom: 1.5rem;
}

.welcome-hero h2 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.welcome-hero p {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  line-height: 1.6;
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.concept-card {
  background: rgba(255, 255, 255, 0.01);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.75rem;
  transition: var(--transition-fast);
}

.concept-card:hover {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.08);
}

.concept-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.concept-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.concept-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 0;
}

/* DOM theme customizer specific styling */
.hash-lab-controls {
  display: flex;
  flex-direction: column;
  margin-top: 1.25rem;
}

.url-mockbar {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 0.75rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.url-mockbar span.protocol {
  color: var(--color-success);
}

.url-mockbar span.domain {
  color: var(--text-main);
}

.url-mockbar span.hash {
  color: var(--accent-cyan);
  font-weight: 600;
  word-break: break-all;
}

.theme-preview-box {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2.5rem;
  margin-top: 1rem;
  text-align: center;
  transition: var(--transition-normal);
  background: rgba(255,255,255,0.01);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  flex-grow: 1;
  min-height: 150px;
}

.theme-preview-box h3 {
  font-size: 1.25rem;
  font-weight: 700;
  transition: var(--transition-normal);
}

/* Prevention checklist & CSP */
.method-checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.method-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.95rem;
}

.checklist-icon {
  color: var(--color-success);
  font-weight: 900;
  font-size: 1.25rem;
  line-height: 1;
}

.csp-status-panel {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.csp-toggle-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.csp-toggle-row strong {
  font-size: 0.95rem;
}

.csp-rules-textarea {
  width: 100%;
  height: 110px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: #cbd5e1;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.85rem;
  resize: none;
}

.csp-rules-textarea:focus {
  outline: none;
  border-color: var(--accent-cyan);
}

/* Alert dialog simulation modal overlay styling */
.alert-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(4, 7, 13, 0.85);
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.alert-modal-overlay.show {
  opacity: 1;
  pointer-events: auto;
}

.alert-modal {
  background: #0f1524;
  border: 2px solid var(--color-danger);
  border-radius: 20px;
  width: 480px;
  max-width: 90%;
  box-shadow: 0 0 35px rgba(244, 63, 94, 0.35);
  overflow: hidden;
  transform: translateY(20px) scale(0.95);
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.alert-modal-overlay.show .alert-modal {
  transform: translateY(0) scale(1);
}

.alert-modal-header {
  background: var(--grad-danger);
  color: white;
  padding: 1.25rem 1.5rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
}

.alert-modal-body {
  padding: 1.75rem;
  color: var(--text-main);
  font-size: 0.95rem;
}

.alert-modal-label {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.alert-modal-code-wrapper {
  margin-top: 1.25rem;
}

.alert-modal-code {
  background: #04070e;
  padding: 1rem 1.25rem;
  border-radius: 10px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #fb7185;
  border: 1px solid rgba(244, 63, 94, 0.2);
  word-break: break-all;
  display: block;
  white-space: pre-wrap;
}

.alert-modal-footer {
  padding: 1.25rem 1.75rem;
  background: rgba(0, 0, 0, 0.25);
  display: flex;
  justify-content: flex-end;
  border-top: 1px solid var(--border-color);
}

/* Utilities spacing */
.mt-1 { margin-top: 1rem; }
.mt-1-5 { margin-top: 1.5rem; }
.mt-2 { margin-top: 2rem; }
.checklist-container h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

/* Mobile Header Navigation */
.mobile-header {
  display: none;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg-sidebar);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 1.5rem;
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  z-index: 100;
  backdrop-filter: var(--glass-blur);
}

.mobile-toggle-btn {
  background: transparent;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.25rem;
  border-radius: 8px;
  transition: var(--transition-fast);
}

.mobile-toggle-btn:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

.mobile-logo-text {
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  background: var(--grad-cyan-blue);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Mobile Close Button (In Sidebar) */
.sidebar-close-btn {
  display: none;
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.35rem;
  border-radius: 8px;
  transition: var(--transition-fast);
  z-index: 20;
}

.sidebar-close-btn:hover {
  color: var(--text-main);
  background-color: rgba(255, 255, 255, 0.05);
}

/* Sidebar Backdrop Overlay */
.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(4, 7, 13, 0.7);
  backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 998;
}

.sidebar-overlay.show {
  opacity: 1;
  pointer-events: auto;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .layout-container {
    flex-direction: column;
    min-height: calc(100vh - 60px);
  }

  .mobile-header {
    display: flex;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 270px;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    box-shadow: 10px 0 40px rgba(0, 0, 0, 0.8);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-close-btn {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .main-content {
    padding: 2rem 2rem;
  }

  header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 2rem;
  }

  .security-control {
    width: 100%;
    justify-content: space-between;
  }

  .grid-2col {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 640px) {
  .main-content {
    padding: 1.25rem 1rem;
  }

  .welcome-hero {
    padding: 2.25rem 1.5rem;
    border-radius: 16px;
  }

  .welcome-hero h2 {
    font-size: 1.75rem;
  }

  .welcome-hero p {
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
  }

  .header-title h1 {
    font-size: 1.75rem;
  }

  .header-title p {
    font-size: 0.85rem;
  }

  .btn {
    width: 100%;
  }

  .comment-form-group .form-actions {
    flex-direction: column;
    gap: 0.5rem;
  }

  .sandbox-input-group {
    flex-direction: column;
    gap: 0.5rem;
  }

  .url-mockbar {
    flex-wrap: wrap;
    font-size: 0.75rem;
    padding: 0.65rem 0.85rem;
  }

  .alert-modal {
    width: 95%;
  }

  .code-block-header {
    padding: 0.5rem 0.85rem;
  }

  pre {
    padding: 0.85rem;
  }

  code {
    font-size: 0.8rem;
  }
}