/**
 * ============================================
 * WANIP.io - SupportCALL Design System
 * Version: 3.8
 * Author: SupportCALL ICT Solutions
 * 
 * Professional IP Address & Network Diagnostics
 * ============================================
 */

/* ============================================
   CSS VARIABLES - DO NOT MODIFY COLORS
   ============================================ */
:root {
  /* Backgrounds */
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-tertiary: #1a2234;
  --bg-card: #151d2e;
  --bg-card-hover: #1c2640;
  
  /* Text Colors */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  /* Accent Colors - Cyan Theme */
  --accent-primary: #06b6d4;
  --accent-secondary: #0ea5e9;
  --accent-glow: rgba(6, 182, 212, 0.4);
  --accent-gradient: linear-gradient(135deg, #06b6d4 0%, #0ea5e9 100%);
  
  /* Status Colors */
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.1);
  --success-glow: rgba(16, 185, 129, 0.3);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.1);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.1);
  --info: #3b82f6;
  --info-bg: rgba(59, 130, 246, 0.1);
  
  /* Borders */
  --border-color: #2d3a52;
  --border-light: #374463;
  
  /* Typography */
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  
  /* Spacing & Layout */
  --container-max: 1400px;
  --section-padding: 4rem;
  --border-radius: 12px;
  --border-radius-lg: 16px;
  --border-radius-sm: 8px;
  --border-radius-xl: 24px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px var(--accent-glow);
  --shadow-glow-lg: 0 0 60px var(--accent-glow);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

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

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

/* ============================================
   ACCESSIBILITY
   ============================================ */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-primary);
  color: var(--bg-primary);
  padding: 1rem 2rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  z-index: 10000;
  transition: top var(--transition-base);
}

.skip-link:focus {
  top: 1rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================
   BACKGROUND EFFECTS
   ============================================ */
.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(6, 182, 212, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(6, 182, 212, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
  z-index: 0;
}

.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

.bg-glow-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
  top: -200px;
  right: -200px;
  animation: float1 20s ease-in-out infinite;
}

.bg-glow-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.12) 0%, transparent 70%);
  bottom: -150px;
  left: -150px;
  animation: float2 25s ease-in-out infinite;
}

.bg-glow-3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.1) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: pulse 15s ease-in-out infinite;
}

@keyframes float1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-50px, 50px) scale(1.1); }
  66% { transform: translate(30px, -30px) scale(0.95); }
}

@keyframes float2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(60px, -40px) scale(1.15); }
}

@keyframes pulse {
  0%, 100% { opacity: 0.3; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 0.5; transform: translate(-50%, -50%) scale(1.2); }
}

/* ============================================
   LAYOUT CONTAINER
   ============================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

/* ============================================
   HEADER
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: background var(--transition-base);
}

.header.scrolled {
  background: rgba(10, 14, 23, 0.95);
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
  transition: opacity var(--transition-fast);
}

.logo:hover {
  opacity: 0.9;
}

.logo-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-gradient);
  border-radius: var(--border-radius-sm);
  color: var(--bg-primary);
  box-shadow: var(--shadow-glow);
}

.logo-icon svg {
  width: 24px;
  height: 24px;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo-version {
  font-size: 0.7rem;
  color: var(--accent-primary);
  font-family: var(--font-mono);
  font-weight: 500;
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  padding: 0.5rem 1rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.nav-link.active {
  color: var(--accent-primary);
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--border-radius-sm);
  transition: background var(--transition-fast);
}

.mobile-menu-toggle:hover {
  background: var(--bg-tertiary);
}

.mobile-menu-toggle svg {
  width: 24px;
  height: 24px;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent-gradient);
  color: var(--bg-primary);
  box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px var(--accent-glow);
}

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

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

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
}

.btn-ghost:hover:not(:disabled) {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.btn-success {
  background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
  color: white;
  box-shadow: 0 4px 15px var(--success-glow);
}

.btn-success:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px var(--success-glow);
}

.btn-warning {
  background: linear-gradient(135deg, var(--warning) 0%, #d97706 100%);
  color: var(--bg-primary);
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
  color: white;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1rem;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
}

.btn-icon {
  padding: 0.75rem;
}

.btn-icon svg {
  width: 20px;
  height: 20px;
}

/* Button Loading State */
.btn-loading {
  pointer-events: none;
}

.btn-loading::after {
  content: '';
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-left: 0.5rem;
}

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

/* ============================================
   MAIN CONTENT AREA
   ============================================ */
main {
  padding-top: 72px;
  min-height: 100vh;
}

.section {
  padding: var(--section-padding) 0;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  padding: 3rem 0 2rem;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.hero-badge-icon {
  width: 16px;
  height: 16px;
  color: var(--accent-primary);
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1rem;
  letter-spacing: -0.03em;
}

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

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.hero-features {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.hero-feature-icon {
  width: 16px;
  height: 16px;
  color: var(--success);
}

/* ============================================
   IP DISPLAY CARD - Main Feature
   ============================================ */
.ip-main-card {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-xl);
  padding: 3rem 2rem;
  margin: 0 auto 2rem;
  max-width: 800px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.ip-main-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
}

.ip-card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.ip-section {
  margin-bottom: 2rem;
}

.ip-section:last-child {
  margin-bottom: 0;
}

.ip-section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.ip-badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background: var(--accent-primary);
  color: var(--bg-primary);
  font-size: 0.65rem;
  font-weight: 700;
  border-radius: 4px;
}

.ip-badge-ipv6 {
  background: var(--info);
}

.ip-display-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.ip-display {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.05em;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  flex: 1;
  min-width: 280px;
  word-break: break-all;
}

.ip-display.ipv6 {
  font-size: clamp(1rem, 2.5vw, 1.4rem);
}

.ip-display-loading {
  color: var(--text-muted);
}

.ip-display-error {
  color: var(--danger);
  font-size: 1rem;
}

/* Copy Button */
.btn-copy {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

.btn-copy svg {
  width: 18px;
  height: 18px;
}

.btn-copy.copied {
  background: var(--success);
  border-color: var(--success);
  color: white;
}

/* IPv6 Container */
.ipv6-container {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

/* Action Buttons */
.ip-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

/* ============================================
   PRIVACY SCORE CARD
   ============================================ */
.privacy-score-card {
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-tertiary) 100%);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-xl);
  padding: 2.5rem;
  margin: 0 auto 2rem;
  max-width: 800px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.privacy-score-header {
  margin-bottom: 1.5rem;
}

.privacy-score-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.privacy-score-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.score-circle-wrapper {
  position: relative;
  width: 160px;
  height: 160px;
  margin: 0 auto 1.5rem;
}

.score-circle {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 6px solid var(--border-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: all var(--transition-base);
}

.score-circle.score-good {
  border-color: var(--success);
  box-shadow: 0 0 30px var(--success-glow);
}

.score-circle.score-medium {
  border-color: var(--warning);
  box-shadow: 0 0 30px rgba(245, 158, 11, 0.3);
}

.score-circle.score-poor {
  border-color: var(--danger);
  box-shadow: 0 0 30px rgba(239, 68, 68, 0.3);
}

.score-value {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
  line-height: 1;
}

.score-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 0.25rem;
}

.score-description {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* Privacy Warnings Grid */
.privacy-warnings {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.warning-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--bg-secondary);
  border-radius: var(--border-radius-sm);
  font-size: 0.8rem;
  border: 1px solid var(--border-color);
}

.warning-item-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.warning-item.good .warning-item-icon {
  color: var(--success);
}

.warning-item.bad .warning-item-icon {
  color: var(--danger);
}

.warning-item.neutral .warning-item-icon {
  color: var(--warning);
}

/* ============================================
   INFORMATION GRID
   ============================================ */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 1.5rem;
  transition: all var(--transition-base);
}

.info-card:hover {
  border-color: var(--accent-primary);
  box-shadow: 0 0 20px var(--accent-glow);
}

.info-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.info-card-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: var(--border-radius-sm);
  color: var(--accent-primary);
}

.info-card-icon svg {
  width: 20px;
  height: 20px;
}

.info-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.info-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--bg-tertiary);
}

.info-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.info-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.info-label-icon {
  width: 14px;
  height: 14px;
  color: var(--text-muted);
}

.info-value {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-primary);
  text-align: right;
  background: var(--bg-secondary);
  padding: 0.4rem 0.75rem;
  border-radius: var(--border-radius-sm);
  max-width: 55%;
  word-break: break-word;
}

.info-value.truncate {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Status Badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.75rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-display);
}

.status-online, .status-success {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid var(--success);
}

.status-offline, .status-danger {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid var(--danger);
}

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

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

/* ============================================
   EXPANDABLE SECTIONS
   ============================================ */
.expandable-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  margin-bottom: 1rem;
  overflow: hidden;
  transition: all var(--transition-base);
}

.expandable-section:hover {
  border-color: var(--border-light);
}

.expandable-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  user-select: none;
  transition: background var(--transition-fast);
}

.expandable-header:hover {
  background: var(--bg-tertiary);
}

.expandable-header-content {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.expandable-icon-wrapper {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: var(--border-radius-sm);
  color: var(--accent-primary);
}

.expandable-icon-wrapper svg {
  width: 18px;
  height: 18px;
}

.expandable-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.expandable-chevron {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: transform var(--transition-base);
}

.expandable-section.open .expandable-chevron {
  transform: rotate(180deg);
}

.expandable-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.expandable-section.open .expandable-content {
  max-height: 2000px;
}

.expandable-body {
  padding: 0 1.5rem 1.5rem;
}

/* ============================================
   PERFORMANCE METRICS
   ============================================ */
.performance-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.performance-item {
  background: var(--bg-secondary);
  border-radius: var(--border-radius);
  padding: 1rem;
}

.performance-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.performance-value {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.performance-bar {
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: 3px;
  margin-top: 0.75rem;
  overflow: hidden;
}

.performance-fill {
  height: 100%;
  background: var(--accent-gradient);
  border-radius: 3px;
  transition: width var(--transition-slow);
}

.performance-fill.good {
  background: var(--success);
}

.performance-fill.medium {
  background: var(--warning);
}

.performance-fill.poor {
  background: var(--danger);
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta-section {
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-tertiary) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-xl);
  padding: 3rem 2rem;
  text-align: center;
  margin: 3rem 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gradient);
}

.cta-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.cta-description {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.cta-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.cta-feature {
  background: var(--bg-secondary);
  padding: 1.25rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
}

.cta-feature-title {
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--accent-primary);
}

.cta-feature-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem;
  margin-top: 4rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand {
  max-width: 350px;
}

.footer-brand .logo {
  margin-bottom: 1rem;
}

.footer-tagline {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 0.4rem 0;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.footer-disclaimer {
  font-size: 0.8rem;
  color: var(--text-muted);
  opacity: 0.7;
  max-width: 700px;
  margin: 1rem auto 0;
}

/* Simple Footer for sub-pages */
.footer-simple {
  text-align: center;
  padding: 2rem;
  margin-top: 3rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-simple a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.footer-simple a:hover {
  opacity: 0.8;
}

/* ============================================
   NOTIFICATION TOAST
   ============================================ */
.notification {
  position: fixed;
  top: 90px;
  right: 20px;
  background: var(--bg-card);
  color: var(--text-primary);
  padding: 1rem 1.5rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  transform: translateX(400px);
  transition: transform var(--transition-base);
  z-index: 2000;
  max-width: 350px;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.notification.show {
  transform: translateX(0);
}

.notification-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

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

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

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

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

.notification.info {
  border-color: var(--accent-primary);
}

.notification.info .notification-icon {
  color: var(--accent-primary);
}

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

.notification.warning .notification-icon {
  color: var(--warning);
}

/* ============================================
   LOADING SPINNER
   ============================================ */
.loading {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-sm {
  width: 16px;
  height: 16px;
  border-width: 2px;
}

.loading-lg {
  width: 40px;
  height: 40px;
  border-width: 4px;
}

/* ============================================
   PAGE CARD (for sub-pages)
   ============================================ */
.page-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-xl);
  max-width: 900px;
  margin: 2rem auto;
  padding: 2.5rem;
}

.page-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 1rem;
  transition: color var(--transition-fast);
}

.back-link:hover {
  color: var(--accent-primary);
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.page-subtitle {
  color: var(--text-secondary);
}

.page-content {
  color: var(--text-secondary);
  line-height: 1.8;
}

.page-content h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 2rem 0 1rem;
}

.page-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 1.5rem 0 0.75rem;
}

.page-content p {
  margin-bottom: 1rem;
}

.page-content ul, .page-content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.page-content li {
  margin-bottom: 0.5rem;
}

.page-content a {
  color: var(--accent-primary);
  text-decoration: none;
}

.page-content a:hover {
  text-decoration: underline;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-accent { color: var(--accent-primary); }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.hidden { display: none !important; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-wrap { flex-wrap: wrap; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
  .footer-content {
    grid-template-columns: 1fr 1fr;
  }
  
  .footer-brand {
    grid-column: 1 / -1;
    max-width: 100%;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 3rem;
  }
  
  .nav {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem;
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .nav.open {
    display: flex;
  }
  
  .nav-link {
    padding: 0.75rem 1rem;
    width: 100%;
    text-align: center;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-features {
    padding: 1rem;
  }
  
  .ip-main-card {
    padding: 2rem 1.5rem;
  }
  
  .ip-display {
    min-width: 100%;
  }
  
  .ip-display-wrapper {
    flex-direction: column;
  }
  
  .btn-copy {
    width: 100%;
    justify-content: center;
  }
  
  .ip-actions {
    flex-direction: column;
  }
  
  .ip-actions .btn {
    width: 100%;
  }
  
  .info-grid {
    grid-template-columns: 1fr;
  }
  
  .privacy-warnings {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .cta-features {
    grid-template-columns: 1fr 1fr;
  }
  
  .page-card {
    margin: 1rem;
    padding: 1.5rem;
  }
  
  .notification {
    left: 20px;
    right: 20px;
    max-width: none;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 1rem;
  }
  
  .hero-title {
    font-size: 1.75rem;
  }
  
  .ip-display {
    font-size: 1.5rem;
  }
  
  .ip-display.ipv6 {
    font-size: 0.9rem;
  }
  
  .score-circle-wrapper {
    width: 130px;
    height: 130px;
  }
  
  .score-circle {
    width: 130px;
    height: 130px;
  }
  
  .score-value {
    font-size: 2.25rem;
  }
  
  .cta-features {
    grid-template-columns: 1fr;
  }
  
  .info-value {
    max-width: 50%;
    font-size: 0.75rem;
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
  .bg-grid,
  .bg-glow,
  .header,
  .notification,
  .btn,
  .footer {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .ip-main-card,
  .info-card,
  .privacy-score-card {
    border: 1px solid #ddd;
    box-shadow: none;
  }
}