:root {
  /* Serious slate/navy palette — corporate, financial, B2B */
  --primary: #0f172a;
  --primary-dark: #020617;
  --primary-light: #334155;
  --primary-50: #f8fafc;
  --primary-100: #e2e8f0;
  --text: #0f172a;
  --text-soft: #1e293b;
  --text-muted: #64748b;
  --bg: #ffffff;
  --bg-soft: #fafafa;
  --bg-tint: #f5f5f4;
  --border: #e2e8f0;
  --border-soft: #f1f5f9;
  --border-strong: #cbd5e1;
  --success: #15803d;
  --radius-sm: 6px;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 6px rgba(15, 23, 42, 0.05), 0 2px 4px rgba(15, 23, 42, 0.03);
  --shadow-lg: 0 10px 25px rgba(15, 23, 42, 0.08), 0 4px 10px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 40px rgba(15, 23, 42, 0.1), 0 8px 16px rgba(15, 23, 42, 0.05);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Inter", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--primary-dark);
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border-soft);
  z-index: 50;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

.brand:hover {
  color: var(--text);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.brand-text span {
  color: var(--text-soft);
  font-weight: 500;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 20px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
  letter-spacing: -0.005em;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: #ffffff;
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

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

.btn-ghost {
  background: transparent;
  color: var(--primary);
  border-color: transparent;
}

.btn-ghost:hover {
  background: var(--primary-50);
  color: var(--primary-dark);
}

.btn-lg {
  height: 52px;
  padding: 0 28px;
  font-size: 1rem;
}

.btn-arrow {
  transition: transform 0.15s ease;
}

.btn:hover .btn-arrow {
  transform: translateX(2px);
}

/* ===== Sections ===== */
section {
  padding: 88px 0;
}

.section-head {
  text-align: center;
  margin-bottom: 56px;
}

.eyebrow {
  display: inline-block;
  padding: 4px 12px;
  background: var(--bg-tint);
  color: var(--text-soft);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  border-radius: 4px;
  border: 1px solid var(--border);
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin-bottom: 12px;
  color: var(--text);
}

.section-head .lead {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 96px 0 80px;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 0%, rgba(15, 23, 42, 0.03) 0%, transparent 50%),
    linear-gradient(180deg, var(--bg-soft) 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--border-soft);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(15, 23, 42, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.02) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse 80% 50% at 50% 0%, #000 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 50% at 50% 0%, #000 30%, transparent 70%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-soft);
  margin-bottom: 24px;
  box-shadow: var(--shadow-xs);
}

.hero-badge svg {
  color: var(--success);
}

.hero h1 {
  font-size: clamp(2.25rem, 5.5vw, 3.75rem);
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: -0.035em;
  margin-bottom: 20px;
  color: var(--text);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero h1 .accent {
  color: var(--text-muted);
  font-weight: 700;
}

.hero p.subhead {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto 36px;
}

.hero .actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Trust Bar ===== */
.trust-bar {
  padding: 32px 0;
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
  background: var(--bg);
}

.trust-bar .trust-label {
  text-align: center;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.trust-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
}

.trust-logos .pay-logo {
  height: 36px;
  width: auto;
  border-radius: 4px;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.12), 0 1px 2px rgba(15, 23, 42, 0.06);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.trust-logos .pay-logo:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(15, 23, 42, 0.14), 0 2px 4px rgba(15, 23, 42, 0.08);
}

/* ===== How It Works ===== */
.how-it-works {
  background: var(--bg-soft);
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  counter-reset: step;
}

.step {
  position: relative;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  text-align: left;
  box-shadow: var(--shadow-xs);
  counter-increment: step;
}

.step::before {
  content: counter(step);
  position: absolute;
  top: -16px;
  left: 28px;
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: var(--shadow-md);
}

.step h3 {
  margin-top: 16px;
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.step p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ===== Features ===== */
.features {
  background: var(--bg);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow-xs);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-100);
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 6px;
  background: var(--primary);
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

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

/* ===== Payment Methods ===== */
.payments {
  background: var(--bg-soft);
}

.payment-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  max-width: 820px;
  margin: 0 auto;
}

.payment-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  text-align: center;
  min-height: 150px;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.payment-card:hover {
  border-color: var(--primary-100);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.payment-card .pay-card-img {
  width: 96px;
  height: auto;
  border-radius: 6px;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.12), 0 1px 2px rgba(15, 23, 42, 0.06);
}

.payment-card .label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-soft);
}

/* ===== Security ===== */
.security {
  background: var(--bg);
}

.security-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.security-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.security-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.security-list .check {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #ecfdf5;
  color: var(--success);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

.security-list h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text);
}

.security-list p {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.security-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  background: var(--bg-soft);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  min-height: 320px;
}

.security-visual .shield {
  width: 140px;
  height: 140px;
  color: var(--primary);
  filter: drop-shadow(0 12px 24px rgba(15, 23, 42, 0.18));
}

/* ===== FAQ ===== */
.faq {
  background: var(--bg-soft);
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  overflow: hidden;
  transition: border-color 0.15s ease;
}

.faq-item[open] {
  border-color: var(--primary-100);
  box-shadow: var(--shadow-sm);
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 24px;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: color 0.15s ease;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary:hover {
  color: var(--primary);
}

.faq-item summary::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--text-muted);
  transition: transform 0.2s ease;
  line-height: 1;
}

.faq-item[open] summary::after {
  content: "−";
  color: var(--primary);
}

.faq-answer {
  padding: 0 24px 20px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* ===== Final CTA ===== */
.cta-final {
  background: var(--primary);
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-final::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 70% 50% at 50% 50%, #000 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 70% 50% at 50% 50%, #000 0%, transparent 70%);
  pointer-events: none;
}

.cta-final .container {
  position: relative;
}

.cta-final h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
  color: #fff;
}

.cta-final p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
}

.cta-final .btn-primary {
  background: #fff;
  color: var(--primary);
}

.cta-final .btn-primary:hover {
  background: var(--bg-soft);
  color: var(--primary-dark);
}

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg);
  padding: 40px 0 32px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.site-footer .footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-soft);
  font-weight: 600;
}

/* ===== Under Construction Page ===== */
.uc-wrap {
  min-height: calc(100vh - 68px - 105px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 56px 24px;
  background:
    radial-gradient(circle at 50% 0%, rgba(15, 23, 42, 0.03) 0%, transparent 50%),
    linear-gradient(180deg, var(--bg-soft) 0%, var(--bg) 100%);
}

.uc-card {
  text-align: center;
  max-width: 540px;
}

.uc-icon {
  width: 80px;
  height: 80px;
  border-radius: 8px;
  background: var(--primary);
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  box-shadow: var(--shadow-md);
}

.uc-card h1 {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 12px;
}

.uc-card p {
  color: var(--text-muted);
  margin-bottom: 32px;
  font-size: 1.05rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  section {
    padding: 64px 0;
  }

  .hero {
    padding: 64px 0 56px;
  }

  .section-head {
    margin-bottom: 40px;
  }

  .security-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .security-visual {
    min-height: 240px;
  }

  .security-visual .shield {
    width: 100px;
    height: 100px;
  }

  .trust-logos {
    gap: 24px;
  }

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

@media (max-width: 480px) {
  .btn-lg {
    width: 100%;
  }

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

  .container,
  .container-narrow {
    padding: 0 20px;
  }
}