/* ==========================================================================
   IPShield Platform — Unified Modern CSS Design System
   Pure CSS3 with Variables, Dark/Light Themes, and Native RTL Support
   ========================================================================== */

:root {
  /* Common typography & transitions */
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Roboto Mono', Consolas, Menlo, monospace;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  --container-max: 1240px;
}

/* --------------------------------------------------------------------------
   Dark Mode Tokens (Default High-Tech Cyber Aesthetic)
   -------------------------------------------------------------------------- */
html.dark, :root {
  --bg-page: #080b11;
  --bg-surface: #0e131f;
  --bg-surface-elevated: #151c2e;
  --bg-surface-hover: #1c263d;
  --bg-glass: rgba(14, 19, 31, 0.75);
  
  --border-subtle: rgba(70, 90, 130, 0.22);
  --border-medium: rgba(90, 120, 175, 0.35);
  --border-glow: rgba(56, 189, 248, 0.4);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-invert: #080b11;

  --accent-cyan: #38bdf8;
  --accent-cyan-glow: rgba(56, 189, 248, 0.18);
  --accent-green: #34d399;
  --accent-green-glow: rgba(52, 211, 153, 0.18);
  --accent-purple: #c084fc;
  --accent-purple-glow: rgba(192, 132, 252, 0.18);
  --accent-amber: #fbbf24;
  --accent-amber-glow: rgba(251, 191, 36, 0.18);
  --accent-red: #f87171;

  --code-bg: #06090e;
  --code-text: #e2e8f0;
  --code-border: rgba(56, 189, 248, 0.3);
  --nav-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.5);
  --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.4);
}

/* --------------------------------------------------------------------------
   Light Mode Tokens (Clean Enterprise Tech Aesthetic)
   -------------------------------------------------------------------------- */
html.light {
  --bg-page: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-surface-hover: #e2e8f0;
  --bg-glass: rgba(255, 255, 255, 0.85);

  --border-subtle: rgba(148, 163, 184, 0.25);
  --border-medium: rgba(148, 163, 184, 0.5);
  --border-glow: rgba(2, 132, 199, 0.3);

  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-invert: #ffffff;

  --accent-cyan: #0284c7;
  --accent-cyan-glow: rgba(2, 132, 199, 0.12);
  --accent-green: #059669;
  --accent-green-glow: rgba(5, 150, 105, 0.12);
  --accent-purple: #9333ea;
  --accent-purple-glow: rgba(147, 51, 234, 0.12);
  --accent-amber: #d97706;
  --accent-amber-glow: rgba(217, 119, 6, 0.12);
  --accent-red: #dc2626;

  --code-bg: #f8fafc;
  --code-text: #0f172a;
  --code-border: #cbd5e1;
  --nav-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.08);
  --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.08);
}

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

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

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

/* RTL Support - Directional flipping */
[dir="rtl"] {
  text-align: end;
}
[dir="ltr"] {
  text-align: start;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.15rem; }

p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--accent-green);
}

code, kbd, samp, pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* Container & Layout */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.section {
  padding-block: 5rem;
  position: relative;
}

@media (max-width: 768px) {
  .section {
    padding-block: 3.5rem;
  }
}

/* --------------------------------------------------------------------------
   Header & Navbar (Frosted Glass, Anti-FOUC, Controls)
   -------------------------------------------------------------------------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background-color: var(--bg-glass);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: var(--nav-shadow);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
  gap: 1.5rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.03em;
}

.brand-icon {
  width: 32px;
  height: 32px;
  color: var(--accent-cyan);
  filter: drop-shadow(0 0 8px var(--accent-cyan-glow));
}

.brand-badge {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
  background: var(--accent-cyan-glow);
  color: var(--accent-cyan);
  border: 1px solid var(--border-medium);
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
  padding-block: 0.25rem;
}

.nav-link:hover, .nav-link.active {
  color: var(--accent-cyan);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Control Buttons (Dark/Light toggle & Lang Selector) */
.btn-icon {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background: var(--bg-surface-hover);
  border-color: var(--border-medium);
  color: var(--accent-cyan);
  transform: translateY(-1px);
}

.btn-icon svg {
  width: 1.15rem;
  height: 1.15rem;
  stroke-width: 2;
}

.lang-dropdown {
  position: relative;
  display: inline-block;
}

.lang-select-btn {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-select-btn:hover {
  border-color: var(--border-medium);
  background: var(--bg-surface-hover);
}

.lang-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  min-width: 150px;
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
  padding: 0.4rem;
  display: none;
  flex-direction: column;
  z-index: 101;
  backdrop-filter: blur(10px);
}

[dir="rtl"] .lang-menu {
  right: auto;
  left: 0;
}

.lang-menu.open {
  display: flex;
}

.lang-item {
  padding: 0.5rem 0.75rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.lang-item:hover, .lang-item.active {
  background: var(--bg-surface-elevated);
  color: var(--accent-cyan);
}

.mobile-toggle {
  display: none;
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 4.5rem;
    left: 0;
    right: 0;
    background: var(--bg-surface);
    flex-direction: column;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-medium);
    gap: 1.25rem;
  }
  .nav-links.open {
    display: flex;
  }
  .mobile-toggle {
    display: inline-flex;
  }
}

/* --------------------------------------------------------------------------
   Buttons & CTAs
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent-cyan);
  color: #080b11;
  font-weight: 700;
  box-shadow: 0 4px 14px var(--accent-cyan-glow);
}
.btn-primary:hover {
  background: #7dd3fc;
  color: #080b11;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-cyan-glow);
}

.btn-secondary {
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  border-color: var(--border-medium);
}
.btn-secondary:hover {
  background: var(--bg-surface-hover);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

.btn-outline-green {
  background: transparent;
  color: var(--accent-green);
  border-color: var(--accent-green);
}
.btn-outline-green:hover {
  background: var(--accent-green-glow);
  transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
  padding-block: 6rem 5rem;
  position: relative;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -15%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 450px;
  background: radial-gradient(circle, var(--accent-cyan-glow) 0%, rgba(192, 132, 252, 0.08) 50%, transparent 80%);
  filter: blur(70px);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
  margin-inline: auto;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 1.1rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 16px rgba(0,0,0,0.25);
}

.hero-tag-bold {
  color: #fff;
  background: linear-gradient(135deg, var(--accent-cyan) 0%, #818cf8 50%, var(--accent-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.hero-tag-sep {
  color: var(--text-muted);
  opacity: 0.5;
}

.hero-tag-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-green);
  box-shadow: 0 0 10px var(--accent-green);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

.gradient-text {
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-cyan) 80%, var(--accent-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2.25rem;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3.5rem;
}

.hero-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
}

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

.hero-badge-item svg {
  color: var(--accent-green);
  width: 16px;
  height: 16px;
}

/* --------------------------------------------------------------------------
   Cards, Grids & Bento Layout
   -------------------------------------------------------------------------- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

@media (max-width: 1024px) {
  .grid-3, .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--card-shadow);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card:hover {
  border-color: var(--border-medium);
  transform: translateY(-4px);
  box-shadow: 0 16px 36px -12px rgba(0, 0, 0, 0.35);
}

.card-glow-cyan:hover {
  border-color: var(--accent-cyan);
  box-shadow: 0 12px 30px -8px var(--accent-cyan-glow);
}

.card-glow-purple:hover {
  border-color: var(--accent-purple);
  box-shadow: 0 12px 30px -8px var(--accent-purple-glow);
}

.card-glow-green:hover {
  border-color: var(--accent-green);
  box-shadow: 0 12px 30px -8px var(--accent-green-glow);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-medium);
  color: var(--accent-cyan);
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.card-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   Comparison Table / The Paradox Matrix
   -------------------------------------------------------------------------- */
.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  box-shadow: var(--card-shadow);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  text-align: start;
}

.compare-table th, .compare-table td {
  padding: 1.15rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.compare-table th {
  background: var(--bg-surface-elevated);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.compare-table tr:last-child td {
  border-bottom: none;
}

.compare-table tr:hover td {
  background: var(--bg-surface-hover);
}

.table-col-highlight {
  background: var(--accent-cyan-glow);
  border-inline: 1px solid var(--border-glow);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
}

.status-badge.success {
  background: var(--accent-green-glow);
  color: var(--accent-green);
  border: 1px solid rgba(52, 211, 153, 0.3);
}

.status-badge.danger {
  background: rgba(248, 113, 113, 0.15);
  color: var(--accent-red);
  border: 1px solid rgba(248, 113, 113, 0.3);
}

.status-badge.warning {
  background: var(--accent-amber-glow);
  color: var(--accent-amber);
  border: 1px solid rgba(251, 191, 36, 0.3);
}

/* --------------------------------------------------------------------------
   Interactive Tabs & TEE Inspector
   -------------------------------------------------------------------------- */
.tab-nav {
  display: flex;
  gap: 0.5rem;
  background: var(--bg-surface-elevated);
  padding: 0.4rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  overflow-x: auto;
  margin-bottom: 2rem;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

.tab-btn.active {
  background: var(--accent-cyan);
  color: #080b11;
  font-weight: 700;
  box-shadow: 0 2px 10px var(--accent-cyan-glow);
}

.tab-panel {
  display: none;
  animation: fadeIn 0.3s ease;
}

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

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

/* --------------------------------------------------------------------------
   Code Block & CLI Showcase
   -------------------------------------------------------------------------- */
.terminal-card {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
  overflow: hidden;
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--code-border);
}

.terminal-dots {
  display: flex;
  gap: 0.4rem;
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot-red { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #27c93f; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.terminal-copy {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.6rem;
  font-size: 0.75rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.terminal-copy:hover {
  background: var(--bg-surface-elevated);
  color: var(--accent-cyan);
}

.terminal-body {
  padding: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.8;
  overflow-x: auto;
  color: var(--code-text);
}

/* --------------------------------------------------------------------------
   Hardware & Attestation Spec Box (TEE Inspector & Entitlement Simulator)
   -------------------------------------------------------------------------- */
.spec-box {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: var(--code-bg);
  color: var(--code-text);
  padding: 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--code-border);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.15);
  line-height: 1.7;
}

.spec-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding-block: 0.45rem;
  border-bottom: 1px dashed var(--border-subtle);
  flex-wrap: wrap;
}

.spec-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.spec-row:first-child {
  padding-top: 0;
}

.spec-label {
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

.spec-value {
  color: var(--code-text);
  font-weight: 600;
  text-align: end;
  word-break: break-word;
}

.spec-value.spec-highlight {
  color: var(--accent-cyan);
  font-weight: 700;
}

.spec-value.spec-accent {
  color: var(--accent-green);
  font-weight: 700;
}

.spec-value.spec-purple {
  color: var(--accent-purple);
  font-weight: 700;
}

html.light .spec-box {
  background: #f1f5f9;
  border-color: #cbd5e1;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.05);
}

html.light .spec-label {
  color: #475569;
}

html.light .spec-value {
  color: #0f172a;
}

html.light .spec-value.spec-highlight {
  color: #0284c7;
}

html.light .spec-value.spec-accent {
  color: #059669;
}

html.dark .spec-box {
  background: #090d16;
  border-color: rgba(56, 189, 248, 0.35);
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.4);
}

html.dark .spec-label {
  color: #94a3b8;
}

html.dark .spec-value {
  color: #f1f5f9;
}

html.dark .spec-value.spec-highlight {
  color: #38bdf8;
}

html.dark .spec-value.spec-accent {
  color: #34d399;
}

.terminal-prompt {
  color: var(--accent-cyan);
  margin-inline-end: 0.5rem;
}
.terminal-keyword {
  color: var(--accent-purple);
}
.terminal-param {
  color: var(--accent-green);
}
.terminal-comment {
  color: var(--text-muted);
  font-style: italic;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  margin-top: auto;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding-block: 4rem 2rem;
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-col h5 {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}
.footer-links a:hover {
  color: var(--accent-cyan);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 1rem;
}

/* --------------------------------------------------------------------------
   Utility Classes & Animations
   -------------------------------------------------------------------------- */
.text-center { text-align: center; }
.text-start { text-align: start; }
.text-end { text-align: end; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-6 { margin-bottom: 3rem; }

.section-header {
  text-align: center;
  max-width: 760px;
  margin-inline: auto;
  margin-bottom: 3.5rem;
}
.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-cyan);
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

/* --------------------------------------------------------------------------
   Enhanced Grid 4 & Responsive Flex
   -------------------------------------------------------------------------- */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
@media (max-width: 1080px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 640px) {
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* --------------------------------------------------------------------------
   Interactive Live Terminal Demo Component
   -------------------------------------------------------------------------- */
.terminal-window {
  background: #050811;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 45px -10px rgba(0, 0, 0, 0.6);
  font-family: var(--font-mono);
  margin-top: 2rem;
}
.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background: #090e1a;
  border-bottom: 1px solid var(--border-subtle);
}
.terminal-dots {
  display: flex;
  gap: 6px;
}
.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.terminal-dot.red { background: #ef4444; }
.terminal-dot.yellow { background: #f59e0b; }
.terminal-dot.green { background: #10b981; }

.terminal-tabs {
  display: flex;
  gap: 0.5rem;
}
.terminal-tab-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.terminal-tab-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}
.terminal-tab-btn.active {
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.3);
}

.terminal-body {
  padding: 1.5rem;
  min-height: 240px;
  color: #e2e8f0;
  font-size: 0.88rem;
  line-height: 1.7;
  overflow-x: auto;
}
.terminal-panel {
  display: none;
}
.terminal-panel.active {
  display: block;
  animation: fadeIn 0.25s ease-in-out;
}
.terminal-line {
  margin-bottom: 0.35rem;
}
.terminal-prompt {
  color: var(--accent-cyan);
  user-select: none;
}
.terminal-dim { color: #64748b; }
.terminal-success { color: #34d399; }
.terminal-danger { color: #f87171; }
.terminal-warn { color: #fbbf24; }
.terminal-accent { color: #c084fc; }

/* --------------------------------------------------------------------------
   Pricing 4-Tier Cards & Value Architecture
   -------------------------------------------------------------------------- */
.pricing-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}
.pricing-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
  box-shadow: 0 16px 36px -8px rgba(0, 0, 0, 0.3);
}
.pricing-card.featured {
  border-color: var(--accent-cyan);
  background: linear-gradient(180deg, var(--bg-surface) 0%, rgba(56, 189, 248, 0.04) 100%);
  box-shadow: 0 0 25px -5px rgba(56, 189, 248, 0.18);
}
.pricing-card.enterprise {
  border-color: var(--accent-purple);
  background: linear-gradient(180deg, var(--bg-surface) 0%, rgba(192, 132, 252, 0.04) 100%);
}

.pricing-badge-top {
  position: absolute;
  top: -12px;
  right: 1.25rem;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
}
.badge-cyan { background: #0284c7; color: #fff; }
.badge-purple { background: #7e22ce; color: #fff; }
.badge-green { background: #059669; color: #fff; }

.pricing-cap-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: var(--accent-cyan);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.25rem;
  letter-spacing: 0.02em;
}
.pricing-cap-pill.enterprise {
  background: rgba(192, 132, 252, 0.14);
  border-color: rgba(192, 132, 252, 0.45);
  color: #c084fc;
}
.pricing-cap-pill svg {
  flex-shrink: 0;
}

.pricing-header h3 {
  font-size: 1.25rem;
  margin-bottom: 0.4rem;
}
.pricing-subtext {
  font-size: 0.82rem;
  color: var(--text-muted);
  min-height: 2.6rem;
  margin-bottom: 1.25rem;
  line-height: 1.4;
}

.pricing-cost {
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}
.pricing-price {
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}
.pricing-period {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.35rem;
}
.pricing-tco-hint {
  display: inline-block;
  margin-top: 0.6rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-green);
  background: var(--accent-green-glow);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
}

.pricing-features {
  list-style: none;
  font-size: 0.86rem;
  color: var(--text-secondary);
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: 2rem;
}
.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  line-height: 1.4;
}
.pricing-features svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--accent-green);
}

/* --------------------------------------------------------------------------
   Interactive TCO Calculator
   -------------------------------------------------------------------------- */
.tco-calculator-box {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--card-shadow);
  margin-top: 3rem;
}
.calc-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}
@media (max-width: 900px) {
  .calc-controls {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

.slider-container {
  margin-top: 1.25rem;
}
.slider-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.tco-slider {
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: var(--border-medium);
  outline: none;
  -webkit-appearance: none;
  cursor: pointer;
  accent-color: var(--accent-cyan);
}
.tco-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent-cyan);
  cursor: pointer;
  box-shadow: 0 0 12px var(--accent-cyan);
  border: 2px solid #fff;
}
.tco-slider::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent-cyan);
  cursor: pointer;
  box-shadow: 0 0 12px var(--accent-cyan);
  border: 2px solid #fff;
}
.tco-slider::-moz-range-track {
  height: 8px;
  border-radius: 4px;
  background: var(--border-medium);
}

.slider-labels span {
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 4px;
  transition: all var(--transition-fast);
}
.slider-labels span:hover {
  color: var(--accent-cyan);
  background: var(--bg-surface-elevated);
}

.btn-stepper {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  width: 30px;
  height: 30px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  font-weight: 700;
  cursor: pointer;
  line-height: 1;
  padding: 0;
  transition: all var(--transition-fast);
  user-select: none;
}
.btn-stepper:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}
.btn-stepper:active {
  transform: scale(0.95);
}

.provider-pills {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}
.provider-pill-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.provider-pill-btn:hover {
  border-color: var(--border-glow);
  color: var(--text-primary);
}
.provider-pill-btn.active {
  background: var(--accent-cyan-glow);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}
.provider-pill-btn.pill-disabled {
  opacity: 0.45;
  border-style: dashed;
}

.calc-tier-alert {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.84rem;
  line-height: 1.45;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  transition: all var(--transition-fast);
}
.calc-tier-alert.info {
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.25);
  color: var(--accent-cyan);
}
.calc-tier-alert.upgrade {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.35);
  color: #fbbf24;
}
.calc-tier-alert.enterprise-alert {
  background: rgba(192, 132, 252, 0.1);
  border: 1px solid rgba(192, 132, 252, 0.35);
  color: #c084fc;
}

.calc-display-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.calc-breakdown-row {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px dashed var(--border-subtle);
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.calc-breakdown-row strong {
  color: var(--text-primary);
}
.calc-total-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-top: 1rem;
  padding-top: 0.75rem;
}
.calc-total-amount {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent-green);
}
.calc-savings-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1rem;
  padding: 0.5rem 0.85rem;
  background: var(--accent-green-glow);
  border: 1px solid rgba(52, 211, 153, 0.35);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  color: var(--accent-green);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   Competitor Table Polish
   -------------------------------------------------------------------------- */
.competitor-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.88rem;
  margin-top: 1.5rem;
}
.competitor-table th,
.competitor-table td {
  padding: 1rem 1.15rem;
  border-bottom: 1px solid var(--border-subtle);
  text-align: start;
}
.competitor-table thead th {
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  font-weight: 700;
  position: sticky;
  top: 0;
  z-index: 2;
}
.competitor-table .col-vastar {
  background: rgba(56, 189, 248, 0.05);
  border-inline: 1px solid var(--accent-cyan);
  font-weight: 600;
}
.competitor-table thead .col-vastar {
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent-cyan);
  border-top: 2px solid var(--accent-cyan);
}
.competitor-table tr:hover td {
  background: var(--bg-surface-hover);
}
.competitor-table tr:hover .col-vastar {
  background: rgba(56, 189, 248, 0.1);
}

/* --------------------------------------------------------------------------
   Two-Stage Execution Visualizer
   -------------------------------------------------------------------------- */
.two-stage-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1.5rem;
  margin: 2rem 0;
}
@media (max-width: 850px) {
  .two-stage-grid {
    grid-template-columns: 1fr;
  }
}
.stage-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--accent-cyan);
  font-size: 0.8rem;
  font-weight: 700;
  gap: 0.5rem;
  text-align: center;
}
.token-badge {
  background: var(--accent-purple-glow);
  border: 1px solid var(--accent-purple);
  color: var(--accent-purple);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  white-space: nowrap;
}

/* --------------------------------------------------------------------------
   FAQ Accordion Component
   -------------------------------------------------------------------------- */
.faq-grid {
  max-width: 860px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}
.faq-item:hover {
  border-color: var(--border-glow);
}
.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 600;
  text-align: start;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.faq-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
  color: var(--accent-cyan);
}
.faq-item.open .faq-icon {
  transform: rotate(180deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal), padding var(--transition-normal);
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
  padding: 0 1.5rem;
}
.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 0 1.5rem 1.5rem;
}

/* =========================================================================
   Architecture Triple-Plane Showcase (Marketplace vs Vendor vs Private Node)
   ========================================================================= */
.plane-tabs {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}
.plane-tab-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  color: var(--text-secondary);
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition-fast);
}
.plane-tab-btn:hover {
  border-color: var(--border-glow);
  color: var(--text-primary);
}
.plane-tab-btn.active {
  background: var(--accent-cyan-glow);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: 0 0 16px var(--accent-cyan-glow);
}
.plane-panel {
  display: none;
}
.plane-panel.active {
  display: block;
  animation: fadeIn 0.3s ease;
}
.plane-card-mockup {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.35);
}
.plane-mockup-header {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.9rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.plane-mockup-body {
  padding: 1.75rem;
}
.capture-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 1.25rem;
}
.capture-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}
.capture-item:hover {
  transform: translateY(-2px);
  border-color: var(--border-glow);
}
.capture-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  margin-bottom: 0.5rem;
}
.badge-pub { background: rgba(56, 189, 248, 0.15); color: var(--accent-cyan); border: 1px solid var(--accent-cyan); }
.badge-ven { background: rgba(168, 85, 247, 0.15); color: var(--accent-purple); border: 1px solid var(--accent-purple); }
.badge-priv { background: rgba(16, 185, 129, 0.15); color: var(--accent-green); border: 1px solid var(--accent-green); }