/* txnal.com - Marketing Website Stylesheet */
:root {
  /* Color Palette matching mail.txnal.com & dev.txnal.com */
  --bg-gradient: linear-gradient(135deg, #090d16 0%, #111827 50%, #1e1b4b 100%);
  --bg-page: #090d16;
  --bg-surface: rgba(17, 24, 39, 0.7);
  --bg-surface-hover: rgba(30, 41, 59, 0.8);
  --card-bg: rgba(255, 255, 255, 0.03);
  --card-hover-bg: rgba(255, 255, 255, 0.05);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-border-hover: rgba(99, 102, 241, 0.35);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent: #6366f1;
  --accent-glow: rgba(99, 102, 241, 0.35);
  --accent-light: #818cf8;
  --accent-cyan: #06b6d4;
  --accent-purple: #a855f7;

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --nav-height: 72px;
  --max-width: 1160px;
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

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

/* Page Layout */
.site-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  position: relative;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Sticky Navigation Header */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background: rgba(9, 13, 22, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--card-border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.brand:hover {
  opacity: 0.9;
}

.brand-icon {
  width: 34px;
  height: 34px;
  object-fit: contain;
  filter: drop-shadow(0 0 8px rgba(59, 130, 246, 0.45));
  transition: transform 0.25s ease;
}

.brand:hover .brand-icon {
  transform: scale(1.06);
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(to right, #ffffff 40%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-sub {
  font-size: 0.72rem;
  font-weight: 600;
  color: #6366f1;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
  line-height: 1;
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: #ffffff;
}

.nav-action {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.25rem;
  background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: 8px;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-action:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
  background: linear-gradient(135deg, #818cf8 0%, #6366f1 100%);
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* Hero Section */
.hero-section {
  position: relative;
  padding: 6.5rem 0 5rem;
  text-align: center;
  overflow: hidden;
}

.hero-bg-logo-container {
  position: absolute;
  top: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: 580px;
  max-width: 90vw;
  pointer-events: none;
  z-index: 0;
  opacity: 0.14;
  filter: drop-shadow(0 0 70px rgba(99, 102, 241, 0.5));
}

.hero-bg-logo-container svg {
  width: 100%;
  height: auto;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 820px;
  margin: 0 auto;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 600;
  color: #818cf8;
  margin-bottom: 1.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.badge-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #38bdf8;
  box-shadow: 0 0 10px #38bdf8;
  animation: pulse-dot 2.5s infinite;
}

@keyframes pulse-dot {
  0% { transform: scale(0.95); opacity: 0.7; }
  50% { transform: scale(1.35); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.7; }
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #ffffff 30%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2.5rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.85rem;
  background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
  color: #ffffff;
  font-weight: 600;
  font-size: 1rem;
  border-radius: 10px;
  box-shadow: 0 4px 18px rgba(99, 102, 241, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(99, 102, 241, 0.55);
  background: linear-gradient(135deg, #818cf8 0%, #6366f1 100%);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.85rem;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1rem;
  border-radius: 10px;
  border: 1px solid var(--card-border);
  backdrop-filter: blur(8px);
  transition: all 0.25s ease;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* Sections */
.section {
  padding: 5rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3.5rem;
}

.section-tag {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #818cf8;
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.85rem, 3.5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  color: #ffffff;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Purpose / Philosophy Cards */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 2.25rem 1.75rem;
  backdrop-filter: blur(12px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
}

.card:hover {
  background: var(--card-hover-bg);
  border-color: var(--card-border-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 1.25rem;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.25);
  color: #818cf8;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: #ffffff;
}

.card-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* Products & Documentation Showcase */
.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.product-card {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(16px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, #06b6d4, #3b82f6, #6366f1, #a855f7);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.product-card:hover {
  border-color: rgba(99, 102, 241, 0.4);
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

.product-card:hover::before {
  opacity: 1;
}

.product-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.product-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  background: rgba(99, 102, 241, 0.15);
  color: #818cf8;
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.product-tag.tag-dev {
  background: rgba(6, 182, 212, 0.15);
  color: #38bdf8;
  border-color: rgba(6, 182, 212, 0.3);
}

.product-title {
  font-size: 1.65rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
  color: #ffffff;
}

.product-desc {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.75rem;
}

.product-platforms {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 2rem;
  padding: 1.25rem;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.platform-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.92rem;
}

.platform-info {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: #f1f5f9;
  font-weight: 500;
}

.platform-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
}

.badge-live {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-dev {
  background: rgba(148, 163, 184, 0.15);
  color: #94a3b8;
  border: 1px solid rgba(148, 163, 184, 0.25);
}

.card-link-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.85rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 10px;
  transition: all 0.2s ease;
}

.card-link-btn.btn-primary {
  background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
  color: #ffffff;
}

.card-link-btn.btn-dev {
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
  border: 1px solid var(--card-border);
}

.card-link-btn.btn-dev:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
}

/* Call to Action Section */
.cta-section {
  padding: 4.5rem 0 5.5rem;
  text-align: center;
}

.cta-box {
  background: linear-gradient(135deg, rgba(30, 27, 75, 0.5) 0%, rgba(15, 23, 42, 0.7) 100%);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: 24px;
  padding: 3.5rem 2rem;
  backdrop-filter: blur(16px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
  max-width: 860px;
  margin: 0 auto;
}

.cta-title {
  font-size: clamp(1.8rem, 3.2vw, 2.3rem);
  font-weight: 700;
  margin-bottom: 1rem;
  color: #ffffff;
}

.cta-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 620px;
  margin: 0 auto 2rem;
}

/* Footer */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--card-border);
  background: rgba(9, 13, 22, 0.95);
  padding: 2.5rem 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.footer-left strong {
  color: #ffffff;
  letter-spacing: -0.01em;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  flex-wrap: wrap;
}

.footer-link {
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: #ffffff;
}

.footer-version {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  padding: 0.2rem 0.5rem;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

/* Responsive Breakpoints */
@media (max-width: 900px) {
  .cards-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .products-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 768px) {
  .site-nav {
    padding: 1rem 1.25rem;
  }

  .mobile-nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(9, 13, 22, 0.98);
    border-bottom: 1px solid var(--card-border);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.25rem;
    align-items: flex-start;
  }

  .nav-links.is-open {
    display: flex;
  }

  .hero-section {
    padding: 4.5rem 0 3.5rem;
  }

  .product-card {
    padding: 1.75rem;
  }

  .cta-box {
    padding: 2.5rem 1.25rem;
  }

  .footer-content {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
  }
}