/* ==========================================================================
   NitroFTP v1.0 — Design System Moderne, Cyber-Performance & Paiement USDT
   ========================================================================== */

:root {
  --bg-deep: #050811;
  --bg-primary: #090e1a;
  --bg-card: rgba(15, 23, 42, 0.78);
  --bg-card-solid: #0f172a;
  --bg-elevated: #162038;
  --bg-glass: rgba(15, 23, 42, 0.65);

  --nitro-orange: #ff5500;
  --nitro-amber: #ff8c00;
  --nitro-gradient: linear-gradient(135deg, #ff4500 0%, #ff7b00 55%, #ffb700 100%);
  --nitro-glow: 0 0 32px rgba(255, 85, 0, 0.38);

  --usdt-green: #26a17b;
  --usdt-emerald: #00e5a3;
  --usdt-gradient: linear-gradient(135deg, #00c48c 0%, #26a17b 50%, #059669 100%);
  --usdt-glow: 0 0 28px rgba(0, 229, 163, 0.32);

  --cyan-accent: #38bdf8;
  --purple-accent: #818cf8;

  --text-main: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;

  --border-subtle: rgba(148, 163, 184, 0.14);
  --border-highlight: rgba(255, 85, 0, 0.45);
  --border-usdt: rgba(0, 229, 163, 0.45);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

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

  --container-max: 1260px;
  --header-height: 78px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-deep);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-deep);
  background-image:
    radial-gradient(circle at 15% 10%, rgba(255, 85, 0, 0.11) 0%, transparent 40%),
    radial-gradient(circle at 85% 18%, rgba(0, 229, 163, 0.08) 0%, transparent 42%),
    radial-gradient(circle at 50% 65%, rgba(56, 189, 248, 0.06) 0%, transparent 50%),
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 100% 100%, 48px 48px, 48px 48px;
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.22s ease;
}

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

ul, ol {
  list-style: none;
}

code, pre, .mono {
  font-family: var(--font-mono);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   Top Announcement Bar
   ========================================================================== */
.topbar {
  background: linear-gradient(90deg, rgba(255, 85, 0, 0.16) 0%, rgba(0, 229, 163, 0.16) 100%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 9px 16px;
  font-size: 0.85rem;
  text-align: center;
  color: var(--text-secondary);
}

.topbar strong {
  color: #fff;
}

.topbar-badge {
  display: inline-block;
  background: var(--usdt-gradient);
  color: #021810;
  font-weight: 800;
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 999px;
  margin-right: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.topbar a {
  color: var(--usdt-emerald);
  font-weight: 600;
  margin-left: 8px;
  text-decoration: underline;
}

/* ==========================================================================
   Navigation Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(5, 8, 17, 0.85);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-subtle);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.38rem;
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--nitro-gradient);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 18px rgba(255, 85, 0, 0.45);
  font-size: 1.3rem;
}

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

.brand-version {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 6px;
  background: rgba(255, 85, 0, 0.16);
  color: var(--nitro-amber);
  border: 1px solid rgba(255, 85, 0, 0.35);
  margin-left: 4px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.93rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.nav-link:hover,
.nav-link.active {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.nav-link.active {
  color: var(--nitro-amber);
  font-weight: 600;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1.2rem;
}

/* ==========================================================================
   Buttons & Badges
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 22px;
  border-radius: 11px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
}

.btn-lg {
  padding: 16px 28px;
  font-size: 1.05rem;
  border-radius: 13px;
}

.btn-sm {
  padding: 8px 15px;
  font-size: 0.85rem;
  border-radius: 9px;
}

.btn-nitro {
  background: var(--nitro-gradient);
  color: #fff;
  box-shadow: 0 8px 25px rgba(255, 85, 0, 0.38);
}

.btn-nitro:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(255, 85, 0, 0.55);
}

.btn-usdt {
  background: var(--usdt-gradient);
  color: #031c14;
  box-shadow: 0 8px 25px rgba(0, 229, 163, 0.3);
}

.btn-usdt:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 229, 163, 0.48);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.35);
  transform: translateY(-2px);
}

.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(255, 85, 0, 0.12);
  color: var(--nitro-amber);
  border: 1px solid rgba(255, 85, 0, 0.32);
  margin-bottom: 18px;
}

.pill-badge.usdt {
  background: rgba(0, 229, 163, 0.12);
  color: var(--usdt-emerald);
  border-color: rgba(0, 229, 163, 0.32);
}

.pill-badge.cyan {
  background: rgba(56, 189, 248, 0.12);
  color: var(--cyan-accent);
  border-color: rgba(56, 189, 248, 0.32);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 68px 0 60px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 44px;
  align-items: center;
}

.hero-title {
  font-size: clamp(2.35rem, 4.4vw, 3.85rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 22px;
}

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

.text-gradient-usdt {
  background: linear-gradient(135deg, #00ffaa 0%, #26a17b 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 640px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 26px;
}

.hero-meta-list {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 0.86rem;
  color: var(--text-muted);
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-meta-item strong {
  color: var(--text-secondary);
}

/* ==========================================================================
   Live NitroBoost Visual Engine Widget
   ========================================================================== */
.nitro-live-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 85, 0, 0.35);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.65), var(--nitro-glow);
  backdrop-filter: blur(16px);
}

.live-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 18px;
}

.window-dots {
  display: flex;
  gap: 7px;
}

.window-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.window-dot.red { background: #ef4444; }
.window-dot.yellow { background: #f59e0b; }
.window-dot.green { background: #10b981; }

.live-speed-badge {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--usdt-emerald);
  background: rgba(0, 229, 163, 0.12);
  padding: 4px 12px;
  border-radius: 8px;
  border: 1px solid rgba(0, 229, 163, 0.3);
}

.segment-map-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  font-family: var(--font-mono);
}

.segment-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 5px;
  margin-bottom: 18px;
}

.segment-cell {
  height: 22px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.segment-fill {
  height: 100%;
  background: var(--nitro-gradient);
  border-radius: 3px;
  transition: width 0.3s ease;
}

.benchmark-bars {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-subtle);
}

.bench-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.bench-row-top {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
}

.bench-track {
  height: 10px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 999px;
  overflow: hidden;
}

.bench-bar-std {
  width: 12%;
  height: 100%;
  background: #64748b;
}

.bench-bar-nitro {
  width: 96%;
  height: 100%;
  background: var(--nitro-gradient);
  box-shadow: 0 0 14px rgba(255, 85, 0, 0.7);
}

/* ==========================================================================
   Protocol Ribbon
   ========================================================================== */
.protocol-ribbon {
  padding: 26px 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(9, 14, 26, 0.75);
}

.protocol-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.protocol-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.protocol-chip strong {
  color: #fff;
}

.protocol-chip .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--nitro-orange);
}

.protocol-chip.cloud .dot {
  background: var(--cyan-accent);
}

.protocol-chip.sec .dot {
  background: var(--usdt-emerald);
}

/* ==========================================================================
   Sections & Headings
   ========================================================================== */
.section {
  padding: 84px 0;
}

.section-alt {
  background: rgba(9, 14, 26, 0.65);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 54px;
}

.section-title {
  font-size: clamp(1.85rem, 3.2vw, 2.75rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.08rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Feature Cards Grid
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-highlight);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(255, 85, 0, 0.14);
  border: 1px solid rgba(255, 85, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.45rem;
  margin-bottom: 18px;
}

.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.94rem;
}

.feature-tag {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--nitro-amber);
  background: rgba(255, 85, 0, 0.1);
  padding: 3px 9px;
  border-radius: 6px;
}

/* ==========================================================================
   Screenshots Showcase
   ========================================================================== */
.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.screenshot-frame {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.55);
  transition: transform 0.28s ease, border-color 0.28s ease;
}

.screenshot-frame:hover {
  transform: translateY(-4px);
  border-color: var(--nitro-orange);
}

.screenshot-frame img {
  width: 100%;
  border-bottom: 1px solid var(--border-subtle);
}

.screenshot-caption {
  padding: 20px 24px;
}

.screenshot-caption h3 {
  font-size: 1.12rem;
  margin-bottom: 6px;
}

.screenshot-caption p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Interactive Speed Calculator
   ========================================================================== */
.calculator-box {
  background: var(--bg-card);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 36px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
  align-items: center;
}

.calc-controls {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.calc-group label {
  display: flex;
  justify-content: space-between;
  font-weight: 600;
  font-size: 0.94rem;
  margin-bottom: 8px;
}

.calc-group label span {
  color: var(--nitro-amber);
  font-family: var(--font-mono);
}

.range-slider {
  width: 100%;
  accent-color: var(--nitro-orange);
  height: 8px;
  border-radius: 999px;
  background: #1e293b;
  cursor: pointer;
}

.calc-results {
  background: rgba(5, 8, 17, 0.75);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 26px;
}

.calc-stat-box {
  padding: 14px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.calc-stat-box:last-child {
  border-bottom: none;
}

.calc-stat-label {
  font-size: 0.84rem;
  color: var(--text-muted);
}

.calc-stat-value {
  font-size: 1.65rem;
  font-weight: 800;
  font-family: var(--font-mono);
}

.calc-stat-value.fast {
  color: var(--usdt-emerald);
}

.calc-stat-value.slow {
  color: #f87171;
}

/* ==========================================================================
   Comparison Table
   ========================================================================== */
.table-wrapper {
  overflow-x: auto;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
}

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

.compare-table th,
.compare-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.94rem;
}

.compare-table th {
  background: rgba(15, 23, 42, 0.95);
  font-weight: 800;
  font-size: 1rem;
}

.compare-table th.highlight-col,
.compare-table td.highlight-col {
  background: rgba(255, 85, 0, 0.08);
  border-left: 1px solid rgba(255, 85, 0, 0.3);
  border-right: 1px solid rgba(255, 85, 0, 0.3);
}

.compare-table tr:hover td {
  background: rgba(255, 255, 255, 0.025);
}

.check-yes {
  color: var(--usdt-emerald);
  font-weight: 700;
}

.check-no {
  color: #f87171;
}

.check-partial {
  color: #fbbf24;
}

/* ==========================================================================
   Pricing & USDT Checkout Widget
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all 0.25s ease;
}

.pricing-card.featured {
  border: 2px solid var(--nitro-orange);
  box-shadow: 0 24px 60px rgba(255, 85, 0, 0.22);
  transform: translateY(-8px);
}

.pricing-card.usdt-pro {
  border: 2px solid var(--usdt-emerald);
  box-shadow: 0 24px 60px rgba(0, 229, 163, 0.16);
}

.pricing-ribbon {
  position: absolute;
  top: -13px;
  right: 24px;
  background: var(--nitro-gradient);
  color: #fff;
  font-size: 0.74rem;
  font-weight: 800;
  padding: 4px 12px;
  border-radius: 999px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.pricing-ribbon.emerald {
  background: var(--usdt-gradient);
  color: #021b12;
}

.price-tag {
  margin: 20px 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.price-amount {
  font-size: 3rem;
  font-weight: 900;
  font-family: var(--font-mono);
  line-height: 1;
}

.price-currency {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--usdt-emerald);
}

.price-old {
  text-decoration: line-through;
  color: var(--text-muted);
  font-size: 1.1rem;
}

.price-features {
  margin: 20px 0 28px;
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.price-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.price-features li::before {
  content: "✓";
  color: var(--usdt-emerald);
  font-weight: 900;
  flex-shrink: 0;
}

/* ==========================================================================
   USDT Checkout Box (tarifs-paiement-usdt.html)
   ========================================================================== */
.checkout-container {
  background: var(--bg-card);
  border: 1px solid var(--border-usdt);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: 0 25px 70px rgba(0, 0, 0, 0.65), var(--usdt-glow);
  margin-top: 48px;
}

.checkout-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 38px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.92rem;
  margin-bottom: 7px;
  color: var(--text-main);
}

.form-control {
  width: 100%;
  padding: 13px 16px;
  border-radius: 10px;
  background: rgba(5, 8, 17, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.25);
  color: #fff;
  font-size: 0.95rem;
  font-family: var(--font-sans);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.03em;
}

.form-control:focus {
  outline: none;
  border-color: var(--usdt-emerald);
  box-shadow: 0 0 0 3px rgba(0, 229, 163, 0.16);
}

.form-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 5px;
}

.network-selector {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.network-option {
  background: rgba(5, 8, 17, 0.75);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 14px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.network-option:hover {
  border-color: rgba(0, 229, 163, 0.4);
}

.network-option.active {
  background: rgba(0, 229, 163, 0.1);
  border: 2px solid var(--usdt-emerald);
}

.network-option-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 700;
  font-size: 0.95rem;
}

.network-fee-tag {
  font-size: 0.72rem;
  padding: 2px 7px;
  border-radius: 99px;
  background: rgba(0, 229, 163, 0.16);
  color: var(--usdt-emerald);
}

.wallet-payment-panel {
  background: rgba(5, 8, 17, 0.9);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
}

.qr-wrapper {
  width: 196px;
  height: 196px;
  margin: 16px auto;
  background: #ffffff;
  padding: 12px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

.address-copy-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(0, 229, 163, 0.35);
  padding: 10px 12px;
  border-radius: 10px;
  margin: 12px 0;
}

.address-copy-box code {
  flex: 1;
  font-size: 0.82rem;
  color: var(--usdt-emerald);
  word-break: break-all;
}

.license-result-box {
  margin-top: 24px;
  padding: 24px;
  border-radius: var(--radius-md);
  background: rgba(0, 229, 163, 0.09);
  border: 2px solid var(--usdt-emerald);
  display: none;
}

.license-result-box.visible {
  display: block;
  animation: fadeIn 0.35s ease;
}

.license-key-textarea {
  width: 100%;
  min-height: 98px;
  background: #030712;
  color: #00ffaa;
  border: 1px solid rgba(0, 229, 163, 0.45);
  border-radius: 10px;
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  resize: vertical;
  margin: 12px 0;
}

/* ==========================================================================
   FAQ Accordion
   ========================================================================== */
.faq-list {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  color: var(--text-main);
  padding: 20px 24px;
  font-size: 1.04rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.faq-question:hover {
  color: var(--nitro-amber);
}

.faq-toggle-icon {
  font-size: 1.3rem;
  color: var(--nitro-orange);
  transition: transform 0.25s ease;
}

.faq-item.open .faq-toggle-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.faq-item.open .faq-answer {
  max-height: 550px;
  padding: 0 24px 22px;
}

/* ==========================================================================
   Breadcrumbs & Page Hero
   ========================================================================== */
.page-hero {
  padding: 52px 0 42px;
  border-bottom: 1px solid var(--border-subtle);
  background: radial-gradient(circle at 50% 0%, rgba(255, 85, 0, 0.14), transparent 65%);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.breadcrumb a:hover {
  color: var(--nitro-amber);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: #03060d;
  border-top: 1px solid var(--border-subtle);
  padding: 64px 0 36px;
  margin-top: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.1fr;
  gap: 36px;
  margin-bottom: 44px;
}

.footer-col h4 {
  font-size: 0.96rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: #fff;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--nitro-amber);
}

.footer-bottom {
  padding-top: 28px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid,
  .calculator-box,
  .checkout-grid {
    grid-template-columns: 1fr;
  }

  .features-grid,
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-card.featured {
    transform: none;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: inline-flex;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #070c18;
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    padding: 16px;
    align-items: stretch;
  }

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

  .features-grid,
  .screenshots-grid,
  .pricing-grid,
  .network-selector,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .checkout-container {
    padding: 22px;
  }
}

/* ==========================================================================
   Multilingual Switcher (FR, EN, ES, DE, AR, RU) & RTL Support
   ========================================================================== */
.lang-switcher {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.lang-select {
  appearance: none;
  -webkit-appearance: none;
  background: rgba(15, 23, 42, 0.92);
  color: var(--text-main);
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 9px;
  padding: 7px 28px 7px 11px;
  font-size: 0.82rem;
  font-weight: 700;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all 0.2s ease;
  background-image: linear-gradient(45deg, transparent 50%, var(--nitro-amber) 50%),
                    linear-gradient(135deg, var(--nitro-amber) 50%, transparent 50%);
  background-position: calc(100% - 14px) 50%, calc(100% - 9px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}

.lang-select:hover,
.lang-select:focus {
  outline: none;
  border-color: var(--nitro-orange);
  box-shadow: 0 0 12px rgba(255, 85, 0, 0.28);
}

.lang-select option {
  background: #0b1120;
  color: #f8fafc;
  font-weight: 600;
}

.footer-lang-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.footer-lang-pill {
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  cursor: pointer;
}

.footer-lang-pill:hover,
.footer-lang-pill.active {
  border-color: var(--nitro-orange);
  color: #fff;
  background: rgba(255, 85, 0, 0.16);
}

/* Support Arabe RTL (Right-to-Left) */
html[dir="rtl"] {
  direction: rtl;
  text-align: right;
}

html[dir="rtl"] .compare-table {
  text-align: right;
}

html[dir="rtl"] .faq-question {
  text-align: right;
}

html[dir="rtl"] .lang-select {
  padding: 7px 11px 7px 28px;
  background-position: 14px 50%, 9px 50%;
}

html[dir="rtl"] .mono,
html[dir="rtl"] code,
html[dir="rtl"] #customerHwid,
html[dir="rtl"] #usdtTxid,
html[dir="rtl"] #trc20WalletAddress,
html[dir="rtl"] .license-key-textarea {
  direction: ltr;
  text-align: left;
  unicode-bidi: embed;
}