/* ============================================
   DarkTools — Design System & Global Styles
   ============================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

/* --- CSS Custom Properties --- */
:root {
  /* Colors */
  --bg-primary: #06060b;
  --bg-secondary: #0d0d16;
  --bg-tertiary: #13131f;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-hover: rgba(255, 255, 255, 0.08);
  --surface-active: rgba(255, 255, 255, 0.12);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);

  /* Brand */
  --violet-400: #a78bfa;
  --violet-500: #8b5cf6;
  --violet-600: #7c3aed;
  --violet-700: #6d28d9;
  --cyan-400: #22d3ee;
  --cyan-500: #06b6d4;
  --green-400: #4ade80;
  --green-500: #22c55e;
  --red-400: #f87171;
  --red-500: #ef4444;
  --amber-400: #fbbf24;
  --amber-500: #f59e0b;

  /* Gradients */
  --gradient-brand: linear-gradient(135deg, var(--violet-600), var(--cyan-400));
  --gradient-brand-subtle: linear-gradient(135deg, rgba(124, 58, 237, 0.15), rgba(34, 211, 238, 0.15));
  --gradient-surface: linear-gradient(135deg, rgba(255,255,255,0.06), rgba(255,255,255,0.02));
  --gradient-glow: radial-gradient(600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(124, 58, 237, 0.06), transparent 60%);

  /* Text */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-tertiary: #64748b;
  --text-brand: var(--violet-400);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 40px rgba(124, 58, 237, 0.15);
  --shadow-glow-cyan: 0 0 40px rgba(34, 211, 238, 0.1);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Layout */
  --container-max: 1200px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* Background ambient glow */
body::before {
  content: '';
  position: fixed;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse, rgba(124, 58, 237, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  bottom: -200px;
  right: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(ellipse, rgba(34, 211, 238, 0.05) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

a {
  color: var(--violet-400);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--cyan-400);
}

img {
  max-width: 100%;
  display: block;
}

::selection {
  background: rgba(124, 58, 237, 0.3);
  color: #fff;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.15);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255,255,255,0.25);
}

/* --- Layout --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.page-wrapper {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* --- Header / Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: rgba(6, 6, 11, 0.8);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-brand);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  box-shadow: var(--shadow-glow);
  transition: transform var(--transition-spring);
}

.logo:hover .logo-icon {
  transform: rotate(-10deg) scale(1.05);
}

.logo span.brand-dark,
.logo span.brand-pure {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.nav-links a {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: var(--surface-hover);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--gradient-brand);
  border-radius: var(--radius-full);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--space-2);
}

/* --- Hero Section --- */
.hero {
  padding: var(--space-24) 0 var(--space-16);
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--gradient-brand-subtle);
  border: 1px solid rgba(124, 58, 237, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--violet-400);
  margin-bottom: var(--space-8);
  animation: fadeInUp 0.6s ease-out;
}

.hero-badge .pulse {
  width: 8px;
  height: 8px;
  background: var(--green-400);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-6);
  animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero h1 .gradient-text {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto var(--space-10);
  line-height: 1.7;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-12);
  animation: fadeInUp 0.6s ease-out 0.3s both;
}

.hero-stat {
  text-align: center;
}

.hero-stat .number {
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat .label {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

/* --- Tool Cards Grid --- */
.tools-section {
  padding: var(--space-16) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.section-header h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.section-header p {
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--space-6);
}

.tool-card {
  position: relative;
  background: var(--gradient-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  text-decoration: none;
  color: inherit;
  overflow: hidden;
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.tool-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-glow);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.tool-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.tool-card:hover::before {
  opacity: 1;
}

.tool-card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  position: relative;
  z-index: 1;
}

.tool-card-icon.violet {
  background: rgba(124, 58, 237, 0.15);
  color: var(--violet-400);
  box-shadow: 0 0 20px rgba(124, 58, 237, 0.1);
}

.tool-card-icon.cyan {
  background: rgba(34, 211, 238, 0.15);
  color: var(--cyan-400);
  box-shadow: 0 0 20px rgba(34, 211, 238, 0.1);
}

.tool-card-icon.green {
  background: rgba(34, 197, 94, 0.15);
  color: var(--green-400);
  box-shadow: 0 0 20px rgba(34, 197, 94, 0.1);
}

.tool-card-icon.amber {
  background: rgba(245, 158, 11, 0.15);
  color: var(--amber-400);
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.1);
}

.tool-card-icon.red {
  background: rgba(239, 68, 68, 0.15);
  color: var(--red-400);
  box-shadow: 0 0 20px rgba(239, 68, 68, 0.1);
}

.tool-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  position: relative;
  z-index: 1;
}

.tool-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

.tool-card-arrow {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--violet-400);
  font-size: 0.85rem;
  font-weight: 600;
  position: relative;
  z-index: 1;
  transition: gap var(--transition-fast);
}

.tool-card:hover .tool-card-arrow {
  gap: var(--space-3);
}

/* --- Tool Page Layout --- */
.tool-page {
  padding: var(--space-8) 0 var(--space-16);
  flex: 1;
}

.tool-header {
  margin-bottom: var(--space-8);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.85rem;
  color: var(--text-tertiary);
  margin-bottom: var(--space-4);
}

.breadcrumb a {
  color: var(--text-tertiary);
}

.breadcrumb a:hover {
  color: var(--text-primary);
}

.tool-header h1 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.tool-header p {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 600px;
}

/* --- Glass Panel --- */
.glass-panel {
  background: var(--gradient-surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  position: relative;
  overflow: hidden;
}

.glass-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
}

/* --- Form Elements --- */
.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.input-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

textarea,
input[type="text"],
input[type="number"],
input[type="url"],
select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  transition: all var(--transition-fast);
  outline: none;
}

textarea {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  resize: vertical;
  min-height: 200px;
}

textarea:focus,
input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
  border-color: var(--violet-500);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 50px rgba(124, 58, 237, 0.25);
}

.btn-primary:active {
  transform: translateY(0);
}

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

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

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

.btn-ghost:hover {
  color: var(--text-primary);
  background: var(--surface);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: 0.8rem;
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: 1rem;
}

.btn-group {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* --- Toolbar --- */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.toolbar-left,
.toolbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* --- Code Output --- */
.code-output {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text-primary);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 200px;
  max-height: 500px;
  overflow-y: auto;
  position: relative;
}

.code-output .copy-btn {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
}

/* --- Split Layout (input/output) --- */
.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.split-pane {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.split-pane-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.split-pane-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Toggle / Switch --- */
.toggle-group {
  display: flex;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 3px;
  gap: 2px;
}

.toggle-option {
  padding: var(--space-2) var(--space-4);
  border-radius: calc(var(--radius-md) - 2px);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  background: transparent;
  font-family: var(--font-sans);
}

.toggle-option.active {
  background: var(--violet-600);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.toggle-option:hover:not(.active) {
  color: var(--text-secondary);
}

/* --- Checkbox / Options --- */
.option-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.option-row label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.85rem;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}

.option-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--violet-500);
  cursor: pointer;
}

.option-row input[type="range"] {
  flex: 1;
  accent-color: var(--violet-500);
  cursor: pointer;
}

/* --- Status / Badge --- */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.status-badge.success {
  background: rgba(34, 197, 94, 0.15);
  color: var(--green-400);
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.status-badge.error {
  background: rgba(239, 68, 68, 0.15);
  color: var(--red-400);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.status-badge.warning {
  background: rgba(245, 158, 11, 0.15);
  color: var(--amber-400);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.status-badge.info {
  background: rgba(34, 211, 238, 0.15);
  color: var(--cyan-400);
  border: 1px solid rgba(34, 211, 238, 0.2);
}

/* --- Toast Notification --- */
.toast {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  padding: var(--space-3) var(--space-5);
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition-spring);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

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

.toast.success {
  border-color: rgba(34, 197, 94, 0.3);
}

.toast.error {
  border-color: rgba(239, 68, 68, 0.3);
}

/* --- Strength Meter --- */
.strength-meter {
  height: 6px;
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-top: var(--space-2);
}

.strength-meter-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  width: 0%;
}

.strength-meter-fill.weak { width: 25%; background: var(--red-400); }
.strength-meter-fill.fair { width: 50%; background: var(--amber-400); }
.strength-meter-fill.good { width: 75%; background: var(--cyan-400); }
.strength-meter-fill.strong { width: 100%; background: var(--green-400); }

/* --- Color Preview --- */
.color-preview {
  width: 100%;
  height: 120px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: background-color var(--transition-base);
}

.color-swatch {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  border: 2px solid var(--border);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.color-swatch:hover {
  transform: scale(1.1);
}

/* --- Regex Highlights --- */
.regex-highlight {
  background: rgba(124, 58, 237, 0.3);
  border-bottom: 2px solid var(--violet-400);
  padding: 1px 0;
}

/* --- Footer --- */
.site-footer {
  margin-top: auto;
  padding: var(--space-8) 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.8rem;
}

.site-footer a {
  color: var(--text-secondary);
}

.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-links {
  display: flex;
  gap: var(--space-4);
  list-style: none;
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

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

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

.animate-in {
  animation: fadeInUp 0.5s ease-out both;
}

.animate-in-delay-1 { animation-delay: 0.1s; }
.animate-in-delay-2 { animation-delay: 0.2s; }
.animate-in-delay-3 { animation-delay: 0.3s; }
.animate-in-delay-4 { animation-delay: 0.4s; }
.animate-in-delay-5 { animation-delay: 0.5s; }

/* --- Responsive --- */
@media (max-width: 768px) {
  .split-layout {
    grid-template-columns: 1fr;
  }

  .tools-grid {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    gap: var(--space-6);
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(6, 6, 11, 0.95);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: var(--space-4);
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .hero {
    padding: var(--space-16) 0 var(--space-8);
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .toolbar-left, .toolbar-right {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2rem;
  }

  .glass-panel {
    padding: var(--space-4);
    border-radius: var(--radius-lg);
  }

  .btn-group {
    flex-direction: column;
  }

  .hero-stats {
    flex-direction: column;
    gap: var(--space-4);
  }
}

/* --- Utility Classes --- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}

.text-center { text-align: center; }
.text-mono { font-family: var(--font-mono); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.gap-4 { gap: var(--space-4); }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.w-full { width: 100%; }

/* --- 100% Client-Side Privacy Guarantee Section --- */
.privacy-highlight-box {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.08) 0%, rgba(99, 102, 241, 0.06) 50%, rgba(139, 92, 246, 0.08) 100%);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  margin-top: var(--space-8);
  margin-bottom: var(--space-12);
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 35px -5px rgba(0, 0, 0, 0.4), 0 0 30px rgba(16, 185, 129, 0.1);
}

.privacy-highlight-box::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.15), transparent 70%);
  pointer-events: none;
}

.privacy-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.privacy-header-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #34d399;
  font-size: 0.85rem;
  font-weight: 700;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.trust-pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-5);
  margin-top: var(--space-6);
}

.trust-pillar-card {
  background: rgba(18, 18, 28, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.trust-pillar-card:hover {
  transform: translateY(-3px);
  border-color: rgba(52, 211, 153, 0.4);
}

.trust-pillar-icon {
  font-size: 1.6rem;
  margin-bottom: var(--space-3);
  display: inline-block;
}

.trust-pillar-title {
  font-size: 1rem;
  font-weight: 600;
  color: #f1f5f9;
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.trust-pillar-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.privacy-proof-callout {
  margin-top: var(--space-6);
  padding: var(--space-4) var(--space-5);
  background: rgba(15, 23, 42, 0.6);
  border-left: 3px solid #34d399;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

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

.privacy-proof-badge {
  background: rgba(52, 211, 153, 0.1);
  color: #34d399;
  border: 1px solid rgba(52, 211, 153, 0.3);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  white-space: nowrap;
}

.tool-badge-client {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  color: #34d399;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: var(--radius-full);
  padding: 2px 8px;
  margin-left: auto;
}