:root {
  --primary-color: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: #e0e7ff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #64748b;
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --border-color: #e2e8f0;
  --success-color: #10b981;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.1);
  --max-width: 1080px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --border-color: #334155;
    --primary-light: #312e81;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
}

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

a {
  color: var(--primary-color);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  color: var(--text-primary);
}

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

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  flex-shrink: 0;
  display: block;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 24px;
}

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

.main-nav a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 15px;
}

.main-nav a:hover {
  color: var(--primary-color);
  text-decoration: none;
}

.main-nav a.is-active {
  color: var(--primary-color);
}

.lang-switch select {
  appearance: none;
  -webkit-appearance: none;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 6px 28px 6px 12px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 8px center;
  background-size: 16px;
}

.lang-switch select:hover {
  border-color: var(--primary-color);
  color: var(--text-primary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  border: none;
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  color: #fff;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

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

@media (prefers-reduced-motion: reduce) {
  .btn {
    transition: none;
  }
  .btn-primary:hover {
    transform: none;
  }
}

/* Hero */
.hero {
  padding: 72px 0 56px;
  text-align: center;
}

.hero .eyebrow {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary-color);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 16px;
}

.hero p.lede {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 32px;
}

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

.hero-note {
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-muted);
}

/* Sections */
.section {
  padding: 56px 0;
}

.section-header {
  text-align: center;
  max-width: 620px;
  margin: 0 auto 40px;
}

.section-header h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 0 0 12px;
}

.section-header p {
  color: var(--text-secondary);
  margin: 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

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

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--primary-light);
  color: var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.feature-icon svg {
  width: 22px;
  height: 22px;
}

.feature-card h3 {
  font-size: 17px;
  margin: 0 0 8px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0;
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  max-width: 760px;
  margin: 0 auto;
}

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

.price-card.is-highlighted {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
}

.price-card h3 {
  margin: 0 0 4px;
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.price-card .price {
  font-size: 32px;
  font-weight: 700;
  margin: 8px 0 4px;
}

.price-card .price span {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
}

.price-card p.desc {
  color: var(--text-secondary);
  font-size: 14px;
  margin: 8px 0 0;
}

/* CTA band */
.cta-band {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  text-align: center;
}

.cta-band h2 {
  margin: 0 0 12px;
}

.cta-band p {
  color: var(--text-secondary);
  margin: 0 0 24px;
}

/* Content pages (legal / help) */
.page-header {
  padding: 56px 0 24px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
  margin: 0 0 8px;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
}

.page-header .updated {
  color: var(--text-muted);
  font-size: 14px;
}

.legal {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.legal h2 {
  font-size: 20px;
  margin: 40px 0 12px;
}

.legal h2:first-of-type {
  margin-top: 0;
}

.legal p, .legal li {
  color: var(--text-secondary);
  font-size: 15px;
}

.legal ul {
  padding-left: 20px;
}

.legal strong {
  color: var(--text-primary);
}

/* Help */
.help-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  padding: 24px 0 0;
}

.help-toc a {
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 500;
}

.help-toc a:hover {
  background: var(--primary-light);
  color: var(--primary-color);
  text-decoration: none;
}

.faq {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 24px 40px;
}

.faq-item {
  border-bottom: 1px solid var(--border-color);
  padding: 20px 0;
}

.faq-item summary {
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 20px;
  color: var(--primary-color);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

@media (prefers-reduced-motion: reduce) {
  .faq-item summary::after {
    transition: none;
  }
}

.faq-item p, .faq-item ol, .faq-item ul {
  color: var(--text-secondary);
  font-size: 15px;
  margin: 12px 0 0;
}

.contact-card {
  max-width: 640px;
  margin: 0 auto 60px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
}

.contact-card h2 {
  margin: 0 0 8px;
  font-size: 18px;
}

.contact-card p {
  color: var(--text-secondary);
  margin: 0 0 16px;
  font-size: 14px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 32px 0;
}

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

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 14px;
}

.footer-copy {
  color: var(--text-muted);
  font-size: 13px;
}

/* Focus visibility */
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

@media (max-width: 640px) {
  .main-nav {
    gap: 16px;
  }
  .main-nav a {
    font-size: 14px;
  }
  .header-actions {
    gap: 12px;
  }
  .lang-switch select {
    font-size: 13px;
    padding: 5px 24px 5px 10px;
  }
}