/* ==========================================================================
   MouseTester.io - Complete 11-Tool Peripheral Testing Suite Stylesheet (v4.0)
   Zero dependencies | High Performance | Light/Dark Theme | Cloudflare Pages Ready
   ========================================================================== */

:root {
  --bg-primary: #0a0d14;
  --bg-secondary: #111622;
  --bg-tertiary: #182030;
  --bg-card: rgba(22, 30, 46, 0.85);
  --bg-card-hover: rgba(30, 41, 64, 0.95);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(99, 102, 241, 0.4);

  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-subtle: #6b7280;

  --accent-cyan: #06b6d4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.35);
  --accent-indigo: #6366f1;
  --accent-indigo-glow: rgba(99, 102, 241, 0.35);
  --accent-emerald: #10b981;
  --accent-emerald-glow: rgba(16, 185, 129, 0.35);
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-rose-glow: rgba(244, 63, 94, 0.45);
  --accent-purple: #a855f7;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Menlo, Consolas, Monaco, monospace;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow-cyan: 0 0 20px rgba(6, 182, 212, 0.25);
  --shadow-glow-rose: 0 0 20px rgba(244, 63, 94, 0.3);

  --canvas-bg: #0d121c;
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.92);
  --bg-card-hover: #ffffff;
  --border-color: #e2e8f0;
  --border-highlight: rgba(99, 102, 241, 0.5);

  --text-main: #0f172a;
  --text-muted: #475569;
  --text-subtle: #94a3b8;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);
  --canvas-bg: #f8fafc;
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
  overflow-x: hidden;
  transition: background-color 0.2s ease, color 0.2s ease;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #67e8f9;
  text-decoration: underline;
}

/* Header & Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  padding: 0.65rem 1.5rem;
  transition: background-color 0.2s, border-color 0.2s;
}

.nav-container {
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  text-decoration: none !important;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-indigo));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow-cyan);
  color: #ffffff;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  list-style: none;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.85rem;
  padding: 0.4rem 0.65rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-main);
  background: var(--bg-tertiary);
  text-decoration: none;
}

.nav-links a.active {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  border-bottom: 2px solid var(--accent-cyan);
}

/* Nav Dropdown for More Tools */
.nav-dropdown {
  position: relative;
  display: inline-block;
}

.nav-dropdown-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s ease;
}

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

.nav-dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  min-width: 230px;
  box-shadow: var(--shadow-lg);
  padding: 0.5rem;
  z-index: 101;
}

.nav-dropdown:hover .nav-dropdown-content {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-dropdown-content a {
  padding: 0.5rem 0.75rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
}

.nav-dropdown-content a:hover {
  background: rgba(6, 182, 212, 0.12);
  color: var(--accent-cyan);
}

/* Actions: Theme Toggle & Language */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.theme-toggle-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s ease;
  user-select: none;
}

.theme-toggle-btn:hover {
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
}

/* 10-Locale Multilingual Dropdown */
.lang-dropdown {
  position: relative;
}

.lang-btn {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.65rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.lang-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  min-width: 170px;
  box-shadow: var(--shadow-lg);
  padding: 0.4rem;
  z-index: 102;
  max-height: 280px;
  overflow-y: auto;
}

.lang-dropdown:hover .lang-dropdown-menu {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.lang-dropdown-menu a {
  padding: 0.4rem 0.6rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.lang-dropdown-menu a:hover,
.lang-dropdown-menu a.active {
  background: rgba(6, 182, 212, 0.12);
  color: var(--accent-cyan);
  text-decoration: none;
}

.nav-badge {
  font-size: 0.7rem;
  padding: 0.2rem 0.55rem;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: var(--accent-emerald);
  border-radius: var(--radius-full);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

@media (max-width: 1100px) {
  .nav-container { flex-wrap: wrap; }
  .nav-links { order: 3; width: 100%; }
}

/* Main Layout Container */
.container {
  max-width: 1380px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  width: 100%;
}

/* Hero Section */
.hero-header {
  text-align: center;
  margin-bottom: 2rem;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-full);
  color: #818cf8;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.85rem;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulseGlow 1.8s infinite;
}

@keyframes pulseGlow {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.6; }
}

.hero-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto;
}

/* App Grid Layout */
.app-grid {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: 1.75rem;
  margin-bottom: 2.5rem;
}

@media (max-width: 1020px) {
  .app-grid {
    grid-template-columns: 1fr;
  }
}

/* Cards & Glass Containers */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  transition: border-color 0.25s ease, background-color 0.2s;
  position: relative;
}

.glass-panel:hover {
  border-color: var(--border-highlight);
}

/* Mode Selector */
.mode-selector-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.5rem 0.75rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.mode-buttons {
  display: flex;
  gap: 0.35rem;
}

.mode-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

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

.mode-btn.active {
  background: var(--accent-indigo);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 0 12px var(--accent-indigo-glow);
}

/* Timer */
.timer-container {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
}

.timer-ring {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2.5px solid var(--border-color);
  border-top-color: var(--accent-cyan);
  animation: spinTimer 1s linear infinite;
  display: none;
}

.timer-running .timer-ring {
  display: block;
}

@keyframes spinTimer {
  to { transform: rotate(360deg); }
}

.timer-progress-bar {
  width: 100%;
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 1rem;
  display: none;
}

.timer-progress-bar.active {
  display: block;
}

.timer-progress-fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-indigo));
  transition: width 0.1s linear;
}

/* Control Toolbar & Buttons */
.control-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

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

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

.btn-danger {
  background: rgba(244, 63, 94, 0.15);
  color: #fb7185;
  border-color: rgba(244, 63, 94, 0.3);
}

.btn-danger:hover {
  background: rgba(244, 63, 94, 0.25);
  border-color: var(--accent-rose);
}

.btn-cyan {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  border-color: rgba(6, 182, 212, 0.35);
}

.btn-cyan:hover {
  background: rgba(6, 182, 212, 0.25);
  border-color: var(--accent-cyan);
}

.toggle-switch {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  cursor: pointer;
}

.toggle-switch input { display: none; }

.toggle-slider {
  width: 36px;
  height: 20px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  position: relative;
  transition: background 0.3s;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 14px;
  height: 14px;
  background: var(--text-main);
  border-radius: 50%;
  transition: transform 0.2s;
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--accent-cyan);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(16px);
  background: #ffffff;
}

/* Interactive Test Stage (Capture Area) */
.test-stage {
  position: relative;
  background: radial-gradient(circle at center, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
  border: 2px dashed var(--border-highlight);
  border-radius: var(--radius-md);
  min-height: 420px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: crosshair;
  user-select: none;
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.test-stage:hover,
.test-stage.active {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 30px rgba(6, 182, 212, 0.15);
}

.test-stage.glitch-flash {
  animation: glitchBorder 0.4s ease;
}

@keyframes glitchBorder {
  0%, 100% { border-color: var(--border-highlight); }
  50% { border-color: var(--accent-rose); box-shadow: 0 0 35px var(--accent-rose-glow); }
}

.stage-instructions {
  position: absolute;
  top: 1rem;
  left: 1.25rem;
  right: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-subtle);
  pointer-events: none;
}

.stage-watermark {
  position: absolute;
  bottom: 1rem;
  font-size: 0.75rem;
  color: var(--text-subtle);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  pointer-events: none;
}

/* Mouse Visualizer SVG */
.mouse-svg-wrapper {
  position: relative;
  width: 210px;
  height: 330px;
  filter: drop-shadow(0 15px 25px rgba(0, 0, 0, 0.4));
  pointer-events: none;
}

.mouse-svg { width: 100%; height: 100%; }

.mouse-body {
  fill: var(--bg-secondary);
  stroke: var(--border-color);
  stroke-width: 2.5;
}

.mouse-accent-lines {
  stroke: var(--border-color);
  stroke-width: 1.5;
  fill: none;
}

.mouse-btn {
  fill: var(--bg-tertiary);
  stroke: var(--border-color);
  stroke-width: 2;
  transition: fill 0.1s, filter 0.1s, stroke 0.1s;
}

.mouse-btn.active {
  fill: var(--accent-cyan) !important;
  stroke: #67e8f9 !important;
  filter: drop-shadow(0 0 8px var(--accent-cyan));
}

.mouse-btn.btn-side.active {
  fill: var(--accent-indigo) !important;
  stroke: #a5b4fc !important;
  filter: drop-shadow(0 0 8px var(--accent-indigo));
}

.mouse-wheel {
  fill: var(--bg-tertiary);
  stroke: var(--border-color);
  stroke-width: 2;
  transition: all 0.12s ease;
}

.mouse-wheel.btn-active {
  fill: var(--accent-emerald) !important;
  stroke: #6ee7b7 !important;
  filter: drop-shadow(0 0 10px var(--accent-emerald));
}

.mouse-wheel.scroll-up {
  transform-origin: center;
  fill: #0ea5e9;
  stroke: #38bdf8;
  filter: drop-shadow(0 -4px 8px rgba(14, 165, 233, 0.8));
}

.mouse-wheel.scroll-down {
  transform-origin: center;
  fill: #8b5cf6;
  stroke: #a78bfa;
  filter: drop-shadow(0 4px 8px rgba(139, 92, 246, 0.8));
}

.mouse-wheel.scroll-glitch {
  fill: var(--accent-rose) !important;
  stroke: #fda4af !important;
  filter: drop-shadow(0 0 14px var(--accent-rose)) !important;
}

/* Tilt Left / Right Indicators */
.wheel-tilt-indicator {
  position: absolute;
  top: 18%;
  display: flex;
  gap: 80px;
  pointer-events: none;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-subtle);
}

.tilt-arrow {
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  opacity: 0.5;
  transition: all 0.15s ease;
}

.tilt-arrow.active {
  opacity: 1;
  color: var(--accent-amber);
  border-color: var(--accent-amber);
  background: rgba(245, 158, 11, 0.2);
  box-shadow: 0 0 10px rgba(245, 158, 11, 0.4);
}

/* Direction Float Overlay */
.scroll-arrow-indicator {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  pointer-events: none;
}

.direction-badge {
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: var(--bg-card);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  opacity: 0;
  transition: opacity 0.2s, transform 0.2s;
}

.direction-badge.visible { opacity: 1; }
.direction-badge.dir-up { color: #38bdf8; border-color: rgba(56, 189, 248, 0.4); }
.direction-badge.dir-down { color: #a78bfa; border-color: rgba(167, 139, 250, 0.4); }

.glitch-toast {
  position: absolute;
  bottom: 3.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(244, 63, 94, 0.2);
  border: 1px solid var(--accent-rose);
  border-radius: var(--radius-full);
  color: #fecdd3;
  font-size: 0.82rem;
  font-weight: 600;
  backdrop-filter: blur(8px);
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

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

/* Stage Lock Overlay Modal */
.stage-lock-overlay {
  position: absolute;
  inset: 0;
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  text-align: center;
  z-index: 10;
  animation: fadeIn 0.3s ease;
}

.stage-lock-overlay.active { display: flex; }

@keyframes fadeIn {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

.verdict-badge-large {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-full);
  font-weight: 800;
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.verdict-badge-large.clean {
  background: rgba(16, 185, 129, 0.2);
  border: 1px solid var(--accent-emerald);
  color: var(--accent-emerald);
  box-shadow: 0 0 20px var(--accent-emerald-glow);
}

.verdict-badge-large.glitch {
  background: rgba(244, 63, 94, 0.2);
  border: 1px solid var(--accent-rose);
  color: var(--accent-rose);
  box-shadow: 0 0 20px var(--accent-rose-glow);
}

/* Metrics Dashboard */
.metrics-column {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
}

@media (max-width: 600px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.95rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.stat-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
}

.stat-card.alert-card {
  border-color: rgba(244, 63, 94, 0.3);
  background: linear-gradient(180deg, rgba(244, 63, 94, 0.08) 0%, var(--bg-secondary) 100%);
}

.stat-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.stat-value {
  font-size: 1.35rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text-main);
  line-height: 1.2;
}

.stat-unit {
  font-size: 0.75rem;
  color: var(--text-subtle);
  font-family: var(--font-sans);
  margin-left: 0.25rem;
  font-weight: 400;
}

.stat-card.highlight .stat-value { color: var(--accent-cyan); }
.stat-card.alert-card .stat-value { color: var(--accent-rose); }

.stat-badge {
  display: inline-block;
  font-size: 0.65rem;
  padding: 0.1rem 0.35rem;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  font-family: var(--font-sans);
}

/* Button Status Chips */
.button-state-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.5rem;
  margin-top: 0.5rem;
}

@media (max-width: 500px) {
  .button-state-grid { grid-template-columns: repeat(3, 1fr); }
}

.button-chip {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.25rem;
  text-align: center;
  transition: all 0.15s ease;
}

.button-chip .chip-name {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 600;
  display: block;
}

.button-chip .chip-count {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.button-chip.pressed {
  background: rgba(6, 182, 212, 0.2);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.2);
}

.button-chip.chatter-warning {
  background: rgba(244, 63, 94, 0.25) !important;
  border-color: var(--accent-rose) !important;
  box-shadow: 0 0 14px var(--accent-rose-glow) !important;
}

.button-chip.dual-chord {
  border-color: rgba(99, 102, 241, 0.35);
}

.button-chip.dual-chord.pressed {
  background: rgba(99, 102, 241, 0.25) !important;
  border-color: #818cf8 !important;
  box-shadow: 0 0 14px rgba(99, 102, 241, 0.4) !important;
}

.debounce-control {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.debounce-select {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-radius: var(--radius-sm);
  padding: 0.25rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  outline: none;
  cursor: pointer;
  transition: border-color 0.2s ease;
}

.debounce-select:focus {
  border-color: var(--accent-cyan);
}


/* Canvas Container */
.chart-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  position: relative;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chart-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.chart-legend {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 0.75rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--text-muted);
}

.legend-dot { width: 8px; height: 8px; border-radius: 50%; }
.legend-dot.blue { background: #38bdf8; }
.legend-dot.purple { background: #a78bfa; }
.legend-dot.red { background: var(--accent-rose); box-shadow: 0 0 6px var(--accent-rose); }

#scrollWaveCanvas {
  width: 100%;
  height: 130px;
  display: block;
  border-radius: var(--radius-sm);
  background: var(--canvas-bg);
}

/* Polarity Ratio Banner */
.polarity-bar-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
}

.polarity-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.polarity-track {
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: rgba(244, 63, 94, 0.3);
  overflow: hidden;
  display: flex;
}

.polarity-dominant-fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-indigo));
  transition: width 0.2s ease;
}

/* Diagnostic Event Log */
.log-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  height: 160px;
}

.log-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.log-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.log-list {
  flex: 1;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding-right: 0.25rem;
}

.log-list::-webkit-scrollbar { width: 5px; }
.log-list::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }

.log-row {
  display: flex;
  justify-content: space-between;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  background: var(--bg-tertiary);
}

.log-row.glitch {
  background: rgba(244, 63, 94, 0.15);
  color: #fda4af;
  border-left: 2px solid var(--accent-rose);
}

.log-row.normal { color: var(--text-muted); }

/* Diagnostic Verdict Summary Banner */
.health-verdict-banner {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(6, 182, 212, 0.05) 100%);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.health-verdict-banner.warning {
  background: linear-gradient(135deg, rgba(244, 63, 94, 0.15) 0%, rgba(245, 158, 11, 0.05) 100%);
  border-color: rgba(244, 63, 94, 0.4);
}

.verdict-info { display: flex; align-items: center; gap: 1rem; }
.verdict-icon {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-emerald);
  font-size: 1.25rem;
}

.health-verdict-banner.warning .verdict-icon {
  background: rgba(244, 63, 94, 0.2);
  color: var(--accent-rose);
}

.verdict-title { font-weight: 700; font-size: 1.05rem; color: var(--text-main); }
.verdict-desc { font-size: 0.85rem; color: var(--text-muted); }

/* ==========================================================================
   Full 104-Key Visual Keyboard with Strict CSS Grid Numpad
   ========================================================================== */

.keyboard-layout-frame {
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  overflow-x: auto;
  box-shadow: inset 0 4px 20px rgba(0, 0, 0, 0.2);
  min-width: 1060px;
}

.kb-104-container {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.kb-main-section {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.kb-nav-arrow-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.kb-nav-grid {
  display: grid;
  grid-template-columns: repeat(3, 44px);
  grid-template-rows: repeat(2, 44px);
  gap: 5px;
}

.kb-arrow-grid {
  display: grid;
  grid-template-columns: repeat(3, 44px);
  grid-template-rows: repeat(2, 44px);
  gap: 5px;
  margin-top: 36px;
}

/* Strict 4-Column CSS Grid for Numpad */
.kb-numpad-grid {
  display: grid;
  grid-template-columns: repeat(4, 44px);
  grid-template-rows: repeat(5, 44px);
  gap: 5px;
}

.kb-row {
  display: flex;
  gap: 5px;
}

.kb-key {
  height: 44px;
  min-width: 44px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-bottom: 3px solid rgba(0, 0, 0, 0.3);
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  user-select: none;
  transition: all 0.06s ease;
  padding: 0 4px;
  text-align: center;
}

.kb-key.pressed {
  background: var(--accent-cyan) !important;
  color: #032b30 !important;
  border-color: #67e8f9 !important;
  transform: translateY(2px);
  border-bottom-width: 1px !important;
  box-shadow: 0 0 14px var(--accent-cyan-glow);
}

.kb-key.visited {
  background: var(--bg-card);
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

.kb-key.w-125 { min-width: 55px; }
.kb-key.w-150 { min-width: 66px; }
.kb-key.w-175 { min-width: 77px; }
.kb-key.w-200 { min-width: 88px; }
.kb-key.w-225 { min-width: 99px; }
.kb-key.w-275 { min-width: 121px; }
.kb-key.w-space { min-width: 275px; }

/* Numpad 2-unit spans */
.kb-key.numpad-add {
  grid-column: 4;
  grid-row: 2 / span 2;
  height: 100%;
  min-height: 93px;
}

.kb-key.numpad-enter {
  grid-column: 4;
  grid-row: 4 / span 2;
  height: 100%;
  min-height: 93px;
}

.kb-key.numpad-zero {
  grid-column: 1 / span 2;
  width: 100%;
  min-width: 93px;
}

/* Active Keys Tag Cloud */
.active-keys-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
  min-height: 44px;
  align-items: center;
}

.active-key-pill {
  background: rgba(6, 182, 212, 0.2);
  border: 1px solid var(--accent-cyan);
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   Tool 2: Gamepad & Controller Tester Styles
   ========================================================================== */

.gamepad-stage {
  position: relative;
  background: radial-gradient(circle at center, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 440px;
}

.gamepad-svg-wrapper {
  position: relative;
  width: 100%;
  max-width: 440px;
  height: 280px;
}

.gp-body {
  fill: var(--bg-secondary);
  stroke: var(--border-color);
  stroke-width: 3;
}

.gp-btn {
  fill: var(--bg-tertiary);
  stroke: var(--border-color);
  stroke-width: 2;
  transition: all 0.08s ease;
}

.gp-btn.active {
  fill: var(--accent-cyan) !important;
  stroke: #67e8f9 !important;
  filter: drop-shadow(0 0 10px var(--accent-cyan));
}

.gp-stick {
  fill: var(--bg-tertiary);
  stroke: var(--border-color);
  stroke-width: 2.5;
  transition: transform 0.05s ease;
}

.gp-stick.active {
  fill: var(--accent-indigo);
  stroke: #a5b4fc;
}

/* Trigger Pressure Meters */
.trigger-meter-row {
  display: flex;
  gap: 1.5rem;
  width: 100%;
  max-width: 500px;
  margin-top: 1.5rem;
}

.trigger-meter-card {
  flex: 1;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem;
}

.trigger-meter-track {
  width: 100%;
  height: 12px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-top: 0.4rem;
}

.trigger-meter-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-indigo));
  transition: width 0.05s linear;
}

/* Stick Radar & Deadzone Circularity Tracker */
.stick-radar-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-top: 1.25rem;
}

.stick-radar-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  text-align: center;
}

.stick-radar-circle {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  border: 2px dashed var(--border-color);
  margin: 0.75rem auto;
  position: relative;
  background: var(--canvas-bg);
}

.stick-radar-deadzone {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid rgba(244, 63, 94, 0.4);
  background: rgba(244, 63, 94, 0.08);
}

.stick-radar-dot {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-cyan);
  transform: translate(-50%, -50%);
  box-shadow: 0 0 10px var(--accent-cyan);
  transition: transform 0.05s ease;
}

/* ==========================================================================
   Tool 9: Webcam Resolution & Alignment Styles
   ========================================================================== */

.webcam-viewport-container {
  position: relative;
  width: 100%;
  height: 380px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
}

.webcam-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scaleX(-1);
}

.webcam-overlay-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1.5rem;
  background: var(--bg-card);
  backdrop-filter: blur(8px);
  z-index: 5;
}

.webcam-hud-badge {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: var(--bg-card);
  backdrop-filter: blur(6px);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
  z-index: 6;
}

/* CPS, Spacebar, Reaction, Dead Pixel, Motion Blur, Microphone Shared Styles */
.cps-click-stage, .hz-sweep-stage, .reaction-stage {
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  user-select: none;
  position: relative;
  overflow: hidden;
  transition: transform 0.05s ease, border-color 0.2s ease;
}

.cps-click-stage {
  min-height: 280px;
  background: radial-gradient(circle at center, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
  border: 2px dashed var(--accent-cyan);
}

.cps-huge-value, .hz-huge-number, .reaction-huge-time {
  font-size: clamp(3.5rem, 8vw, 5rem);
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-main);
  line-height: 1;
}

.cps-rank-badge, .usb-class-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 1rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.9rem;
  background: rgba(99, 102, 241, 0.15);
  border: 1px solid var(--accent-indigo);
  color: #818cf8;
  margin-top: 0.75rem;
}

.reaction-stage {
  min-height: 380px;
  text-align: center;
  padding: 2rem;
}

.reaction-stage.idle { background: var(--bg-card); border: 2px dashed var(--border-highlight); }
.reaction-stage.waiting { background: #dc2626 !important; border: 2px solid #ef4444; color: #fff; }
.reaction-stage.ready { background: #16a34a !important; border: 2px solid #22c55e; color: #fff; }
.reaction-stage.result { background: #0284c7 !important; border: 2px solid #0ea5e9; color: #fff; }
.reaction-stage.early { background: #d97706 !important; border: 2px solid #f59e0b; color: #fff; }

.dead-pixel-canvas, .motion-blur-stage {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  display: block;
}

.dead-pixel-canvas { height: 380px; }
.motion-blur-stage { height: 300px; background: #0f172a; }

.color-swatch-bar { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 1rem; }
.swatch-btn { width: 38px; height: 38px; border-radius: var(--radius-sm); border: 2px solid transparent; cursor: pointer; }
.swatch-btn.active { border-color: #fff; transform: scale(1.1); }

.speed-slider-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1rem;
  background: var(--bg-secondary);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
}

.speed-slider { flex: 1; accent-color: var(--accent-cyan); }

.mic-meter-track {
  width: 100%;
  height: 24px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.mic-meter-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #10b981 0%, #f59e0b 70%, #f43f5e 95%);
  transition: width 0.05s linear;
}

/* ==========================================================================
   Informational, SEO & Matrix Content Sections
   ========================================================================== */

.content-section {
  max-width: 1080px;
  margin: 4rem auto 0 auto;
  padding-top: 3rem;
  border-top: 1px solid var(--border-color);
}

.section-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.1);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  color: var(--text-main);
}

.section-lead {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3.5rem;
}

.guide-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.guide-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-highlight);
}

.guide-card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-indigo);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.guide-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-main);
}

.guide-card p {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.guide-card ul {
  padding-left: 1.25rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.guide-card li { margin-bottom: 0.5rem; }

.article-block {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  margin-bottom: 3.5rem;
}

.article-block h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 1.25rem;
  color: var(--text-main);
}

.article-block h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
  color: var(--text-main);
}

.article-block p {
  font-size: 0.975rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 1.25rem;
}

.matrix-table-wrapper, .comparison-table-wrapper {
  overflow-x: auto;
  margin: 1.75rem 0 2.5rem 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.matrix-table, .comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  text-align: left;
}

.matrix-table th, .comparison-table th {
  background: var(--bg-tertiary);
  color: var(--text-main);
  padding: 1rem 1.15rem;
  font-weight: 700;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.matrix-table td, .comparison-table td {
  padding: 1rem 1.15rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  vertical-align: middle;
}

.severity-pill {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
}

.severity-critical { background: rgba(244, 63, 94, 0.18); color: #fb7185; border: 1px solid rgba(244, 63, 94, 0.4); }
.severity-high { background: rgba(245, 158, 11, 0.18); color: #fcd34d; border: 1px solid rgba(245, 158, 11, 0.4); }
.severity-medium { background: rgba(6, 182, 212, 0.18); color: var(--accent-cyan); border: 1px solid rgba(6, 182, 212, 0.4); }

/* FAQ Accordion Section */
.faq-section { margin-bottom: 4rem; }
.faq-list { display: flex; flex-direction: column; gap: 1rem; }

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item:hover { border-color: var(--border-highlight); }

.faq-question {
  width: 100%;
  text-align: left;
  padding: 1.25rem 1.5rem;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 1.05rem;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-icon {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
  color: var(--accent-cyan);
}

.faq-item.open .faq-icon { transform: rotate(180deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1), padding 0.3s ease;
  padding: 0 1.5rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 0 1.5rem 1.5rem 1.5rem;
}

/* ==========================================================================
   Comprehensive 4-Column Responsive Footer
   ========================================================================== */
.footer {
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
  padding: 3.5rem 1.5rem 2rem 1.5rem;
  color: var(--text-subtle);
  font-size: 0.875rem;
  position: relative;
  z-index: 10;
}

.footer-container {
  max-width: 1440px;
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1.1fr 1.1fr 1.1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.footer-col h4 {
  color: var(--accent-cyan);
  font-size: 0.8rem;
  font-weight: 800;
  margin-bottom: 1.15rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.footer-col ul {
  list-style: none !important;
  padding: 0 !important;
  margin: 0 !important;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-col li {
  list-style: none !important;
  padding: 0 !important;
  margin: 0 !important;
}

.footer-col a {
  color: var(--text-muted) !important;
  font-size: 0.85rem;
  text-decoration: none !important;
  transition: all 0.18s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.footer-col a:hover {
  color: var(--accent-cyan) !important;
  text-decoration: none !important;
  transform: translateX(3px);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 1.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.82rem;
  color: var(--text-subtle);
}

.footer-bottom a {
  color: var(--text-subtle) !important;
  text-decoration: none !important;
  transition: color 0.15s ease;
}

.footer-bottom a:hover {
  color: var(--accent-cyan) !important;
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.25rem;
  }
}

@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    justify-content: center;
  }
}

/* ==========================================================================
   Cyber Legal & Policy Page Styles
   ========================================================================== */
.legal-container {
  max-width: 920px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem 1.5rem;
}

.legal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  margin-bottom: 2.5rem;
  position: relative;
  overflow: hidden;
}

.legal-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-indigo), transparent);
}

.legal-card h2 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  margin-top: 2.25rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.legal-card h2:first-of-type {
  margin-top: 0.5rem;
}

.legal-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 1.5rem;
  margin-bottom: 0.6rem;
}

.legal-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 1.15rem;
}

.legal-card ul {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.legal-card li {
  font-size: 0.93rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.legal-card code {
  background: rgba(6, 182, 212, 0.12);
  color: var(--accent-cyan);
  padding: 0.2rem 0.45rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
  border: 1px solid rgba(6, 182, 212, 0.25);
}

.legal-card a {
  color: var(--accent-cyan);
  text-decoration: none;
  border-bottom: 1px dashed rgba(6, 182, 212, 0.5);
  transition: all 0.15s ease;
}

.legal-card a:hover {
  color: #67e8f9;
  border-bottom-style: solid;
}

.cyber-callout {
  background: rgba(6, 182, 212, 0.07);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-left: 4px solid var(--accent-cyan);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0;
}

.cyber-callout.warning {
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.35);
  border-left: 4px solid #f59e0b;
}

.cyber-callout-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.4rem;
  color: var(--accent-cyan);
}

.cyber-callout.warning .cyber-callout-title {
  color: #f59e0b;
}

.cyber-callout-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

/* Contact Cards Grid */
.contact-layout-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 2rem;
  align-items: start;
}

@media (max-width: 860px) {
  .contact-layout-grid {
    grid-template-columns: 1fr;
  }
}

.contact-card-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.35rem 1.5rem;
  display: flex;
  gap: 1.15rem;
  align-items: flex-start;
  margin-bottom: 1rem;
  transition: all 0.2s ease;
}

.contact-card-item:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(6, 182, 212, 0.1);
}

.contact-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(6, 182, 212, 0.12);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  flex-shrink: 0;
}

.contact-form-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.cyber-form-group {
  margin-bottom: 1.25rem;
}

.cyber-form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.45rem;
}

.cyber-form-group input,
.cyber-form-group textarea,
.cyber-form-group select {
  width: 100%;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

.cyber-form-group input:focus,
.cyber-form-group textarea:focus,
.cyber-form-group select:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.2);
  background: var(--bg-surface);
}

/* Print Media Query */
@media print {
  body { background: #fff !important; color: #000 !important; }
  .navbar, .control-bar, .test-stage, .faq-section, .footer, .mode-selector-bar, .chart-container { display: none !important; }
  .stat-card, .guide-card { background: transparent !important; border: 1px solid #ccc !important; color: #000 !important; }
}