/* Flash USDT - Shared Styles
   Domain: http://www.aii-t.org/
   Aesthetic: dark crypto, black + neon green
*/

:root {
  --bg: #0a0b0f;
  --bg-elevated: #12141c;
  --bg-card: #161922;
  --border: #1e2230;
  --text: #e8eaef;
  --text-muted: #9ba3b5;
  --accent: #00e676;
  --accent-dim: #00c853;
  --accent-glow: rgba(0, 230, 118, 0.25);
  --danger: #ff5252;
  --radius: 12px;
  --radius-sm: 8px;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --max: 1140px;
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  color: #69f0ae;
}

ul, ol {
  list-style: none;
}

/* ========== HEADER ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 11, 15, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
}

.header-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.logo span {
  color: var(--accent);
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #04120a;
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn-primary:hover {
  background: #69f0ae;
  color: #04120a;
  box-shadow: 0 0 28px rgba(0, 230, 118, 0.4);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
}

.btn-secondary:hover {
  background: rgba(0, 230, 118, 0.1);
  color: #69f0ae;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1.05rem;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
}

/* ========== HERO ========== */
.hero {
  padding: 80px 20px 100px;
  text-align: center;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 230, 118, 0.12), transparent),
    var(--bg);
}

.hero-inner {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.1rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero h1 .accent {
  color: var(--accent);
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

.hero-note {
  margin-top: 28px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ========== SECTIONS ========== */
.section {
  padding: 80px 20px;
}

.section-alt {
  background: var(--bg-elevated);
}

.container {
  max-width: var(--max);
  margin: 0 auto;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.section-header h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* Trust / Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
}

.stat-card .num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 6px;
}

.stat-card .label {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* What is */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.prose h2 {
  font-size: 1.9rem;
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.prose p {
  color: var(--text-muted);
  margin-bottom: 16px;
}

.prose p:last-child {
  margin-bottom: 0;
}

.feature-list {
  margin-top: 20px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
  color: var(--text-muted);
}

.feature-list li::before {
  content: "✓";
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.feature-card:hover {
  border-color: rgba(0, 230, 118, 0.35);
  transform: translateY(-3px);
}

.feature-icon {
  width: 44px;
  height: 44px;
  background: rgba(0, 230, 118, 0.12);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 16px;
  color: var(--accent);
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}

.step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 22px;
  position: relative;
  counter-increment: step;
}

.step::before {
  content: counter(step);
  position: absolute;
  top: -14px;
  left: 22px;
  width: 32px;
  height: 32px;
  background: var(--accent);
  color: #04120a;
  font-weight: 800;
  font-size: 0.95rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step h3 {
  font-size: 1.1rem;
  margin: 12px 0 10px;
}

.step p {
  font-size: 0.92rem;
  color: var(--text-muted);
}

/* Pricing cards */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 26px;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.price-card:hover {
  border-color: rgba(0, 230, 118, 0.4);
  transform: translateY(-4px);
}

.price-card.featured {
  border-color: var(--accent);
  box-shadow: 0 0 30px var(--accent-glow);
  position: relative;
}

.price-card.featured::after {
  content: "Most Popular";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #04120a;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
}

.price-card h3 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.price-card .amount {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--accent);
  margin: 12px 0 6px;
}

.price-card .amount span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
}

.price-card .desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.price-card ul {
  margin-bottom: 28px;
  flex-grow: 1;
}

.price-card ul li {
  font-size: 0.92rem;
  color: var(--text-muted);
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 10px;
}

.price-card ul li::before {
  content: "→";
  color: var(--accent);
}

.price-card .btn {
  width: 100%;
}

/* Mid CTA */
.mid-cta {
  text-align: center;
  padding: 70px 20px;
  background:
    radial-gradient(ellipse 70% 80% at 50% 50%, rgba(0, 230, 118, 0.08), transparent),
    var(--bg-elevated);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.mid-cta h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 14px;
}

.mid-cta p {
  color: var(--text-muted);
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* FAQ Accordion */
.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  background: var(--bg-card);
  overflow: hidden;
}

.faq-q {
  width: 100%;
  text-align: left;
  padding: 18px 22px;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.02rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-family: inherit;
}

.faq-q::after {
  content: "+";
  font-size: 1.3rem;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform 0.2s;
}

.faq-item.open .faq-q::after {
  content: "−";
}

.faq-a {
  display: none;
  padding: 0 22px 18px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.faq-item.open .faq-a {
  display: block;
}

/* Final CTA */
.final-cta {
  text-align: center;
  padding: 90px 20px;
}

.final-cta h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.3rem);
  margin-bottom: 16px;
}

.final-cta p {
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* ========== PAGE HERO (inner pages) ========== */
.page-hero {
  padding: 60px 20px 50px;
  text-align: center;
  background:
    radial-gradient(ellipse 70% 40% at 50% 0%, rgba(0, 230, 118, 0.1), transparent),
    var(--bg);
  border-bottom: 1px solid var(--border);
}

.page-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.page-hero p {
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
  font-size: 1.05rem;
}

/* Content pages */
.content-section {
  padding: 60px 20px 80px;
}

.content-block {
  max-width: 780px;
  margin: 0 auto;
}

.content-block h2 {
  font-size: 1.5rem;
  margin: 36px 0 14px;
  letter-spacing: -0.01em;
}

.content-block h2:first-child {
  margin-top: 0;
}

.content-block h3 {
  font-size: 1.2rem;
  margin: 28px 0 10px;
}

.content-block p {
  color: var(--text-muted);
  margin-bottom: 16px;
}

.content-block ul,
.content-block ol {
  margin: 12px 0 20px 20px;
  color: var(--text-muted);
}

.content-block ul li,
.content-block ol li {
  margin-bottom: 8px;
  list-style: disc;
}

.content-block ol li {
  list-style: decimal;
}

.content-block a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Contact form */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  max-width: 900px;
  margin: 0 auto;
}

.contact-info h3 {
  margin-bottom: 12px;
}

.contact-info p {
  color: var(--text-muted);
  margin-bottom: 20px;
}

.contact-links a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  color: var(--text);
  font-weight: 500;
}

.contact-links a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text-muted);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

/* Reviews */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.review-stars {
  color: var(--accent);
  letter-spacing: 2px;
  margin-bottom: 12px;
  font-size: 0.95rem;
}

.review-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.55;
}

.review-author {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
}

.review-author span {
  font-weight: 400;
  color: var(--text-muted);
}

/* Footer */
.site-footer {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  padding: 60px 20px 30px;
}

.footer-grid {
  max-width: var(--max);
  margin: 0 auto 40px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand .logo {
  margin-bottom: 14px;
  display: inline-block;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.92rem;
  max-width: 280px;
  line-height: 1.55;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text);
}

.footer-col a {
  display: block;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 10px;
}

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

.footer-bottom {
  max-width: var(--max);
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Floating Telegram */
.float-tg {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
  width: 56px;
  height: 56px;
  background: #0088cc;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(0, 136, 204, 0.45);
  transition: transform 0.2s, box-shadow 0.2s;
}

.float-tg:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 28px rgba(0, 136, 204, 0.55);
}

.float-tg svg {
  width: 28px;
  height: 28px;
  fill: #fff;
}

/* Utility */
.text-center { text-align: center; }
.mt-24 { margin-top: 24px; }
.mb-0 { margin-bottom: 0; }

/* ========== RESPONSIVE ========== */
@media (max-width: 980px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
  .reviews-grid { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 20px;
    gap: 16px;
  }

  .nav.open {
    display: flex;
  }

  .menu-toggle {
    display: block;
  }

  .header-inner .btn-primary {
    display: none;
  }

  .stats-grid { grid-template-columns: 1fr 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .hero { padding: 60px 20px 70px; }
  .section { padding: 60px 20px; }
}

@media (max-width: 420px) {
  .stats-grid { grid-template-columns: 1fr; }
  .hero-ctas { flex-direction: column; align-items: stretch; }
  .btn-lg { width: 100%; }
}