:root {
  --color-background: #0F172A;
  --color-surface: #1E293B;
  --color-surface-light: #334155;
  --color-primary: #10B981;
  --color-secondary: #6366F1;
  --color-warning: #F59E0B;
  --color-danger: #EF4444;
  --color-text-primary: #F8FAFC;
  --color-text-secondary: #94A3B8;
  --color-border: #334155;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-family);
  background: var(--color-background);
  color: var(--color-text-primary);
  line-height: 1.5;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* ---- Nav ---- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: 18px;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
}

.brand-tagline {
  color: var(--color-text-secondary);
  font-weight: 400;
  font-size: 13px;
  display: none;
}

.nav-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: 14px;
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--color-text-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  padding: var(--space-xs) var(--space-sm);
  font-size: 18px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}

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

.btn-primary {
  background: var(--color-primary);
  color: #05261b;
}

.btn-primary:hover {
  background: #0ea371;
}

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

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

.btn-lg {
  padding: var(--space-md) var(--space-xl);
  font-size: 16px;
}

/* ---- Hero ---- */
.hero {
  padding: var(--space-xxl) 0 var(--space-xl);
  text-align: center;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  inset: -10% -10% auto -10%;
  height: 480px;
  background: radial-gradient(ellipse at center, rgba(16, 185, 129, 0.15), transparent 70%);
  pointer-events: none;
  z-index: -1;
}

.eyebrow {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  border-radius: 999px;
  border: 1px solid var(--color-border);
  color: var(--color-secondary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: var(--space-lg);
}

.hero h1 {
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.1;
  margin: 0 0 var(--space-lg);
  font-weight: 800;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  max-width: 640px;
  margin: 0 auto var(--space-xl);
  color: var(--color-text-secondary);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-xxl);
}

.pillars {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  color: var(--color-text-secondary);
  font-size: 14px;
}

.pillars span {
  padding: var(--space-xs) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: 999px;
}

/* ---- Sections ---- */
section {
  padding: var(--space-xxl) 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-xl);
}

.section-header h2 {
  font-size: clamp(24px, 3vw, 34px);
  margin: 0 0 var(--space-sm);
}

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

/* ---- What is Finjun ---- */
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.about-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.about-card h3 {
  margin: 0 0 var(--space-sm);
  font-size: 18px;
}

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

/* ---- Features ---- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.feature-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: var(--space-md);
}

.feature-icon.ai { background: rgba(99, 102, 241, 0.15); }
.feature-icon.finance { background: rgba(16, 185, 129, 0.15); }
.feature-icon.knowledge { background: rgba(245, 158, 11, 0.15); }
.feature-icon.enterprise { background: rgba(239, 68, 68, 0.15); }

.feature-card h3 {
  margin: 0 0 var(--space-sm);
  font-size: 16px;
}

.feature-card p {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 13px;
}

/* ---- Pricing ---- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.price-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
}

.price-card.featured {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary);
}

.price-card .badge {
  align-self: flex-start;
  background: var(--color-primary);
  color: #05261b;
  font-size: 11px;
  font-weight: 700;
  padding: 2px var(--space-sm);
  border-radius: 999px;
  margin-bottom: var(--space-sm);
}

.price-card h3 {
  margin: 0 0 var(--space-xs);
  font-size: 18px;
}

.price-card .price {
  font-size: 32px;
  font-weight: 800;
  margin: var(--space-sm) 0;
}

.price-card .price span {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-text-secondary);
}

.price-card ul {
  list-style: none;
  padding: 0;
  margin: var(--space-md) 0 var(--space-lg);
  color: var(--color-text-secondary);
  font-size: 14px;
  flex-grow: 1;
}

.price-card li {
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--color-border);
}

.price-card li:last-child {
  border-bottom: none;
}

/* ---- Download ---- */
.download {
  text-align: center;
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  padding: var(--space-xxl) var(--space-lg);
}

.download h2 {
  margin: 0 0 var(--space-sm);
  font-size: clamp(24px, 3vw, 32px);
}

.download p {
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-xl);
}

.download-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

.store-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-lg);
  font-size: 14px;
  opacity: 0.6;
  cursor: not-allowed;
}

.store-btn .store-icon {
  font-size: 20px;
}

.store-btn small {
  display: block;
  color: var(--color-text-secondary);
  font-size: 11px;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.footer-col h4 {
  margin: 0 0 var(--space-md);
  font-size: 13px;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col li {
  margin-bottom: var(--space-sm);
}

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

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  color: var(--color-text-secondary);
  font-size: 13px;
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-lg);
}

/* ---- Responsive ---- */
@media (min-width: 720px) {
  .brand-tagline {
    display: inline;
  }
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .about-grid,
  .features-grid,
  .pricing-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .about-grid,
  .features-grid,
  .pricing-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .nav-actions .btn-ghost {
    display: none;
  }
}

/* ---- Mobile nav drawer ---- */
.mobile-nav {
  display: none;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg) var(--space-lg);
  border-top: 1px solid var(--color-border);
}

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

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