:root  {
  --bg-color: #FFFFFF;
  --text-color: #1A1A1A;
  --primary-color: #003366;
  --primary-hover: #002244;
  --link-color: #0055A5;
  --link-hover: #003366;
  --focus-color: #D9381E;
  --card-bg: rgba(244, 244, 246, 0.92);
  /* Translucent light card */ --error-color: #A80000;
}

@media (prefers-color-scheme: dark)  {
  :root  {
    --bg-color: #0A0A0A;
    --text-color: #F4F4F4;
    --primary-color: #4DA3FF;
    --primary-hover: #80BFFF;
    --link-color: #66B2FF;
    --link-hover: #99CCFF;
    --focus-color: #FF5733;
    --card-bg: rgba(26, 26, 30, 0.88);
    /* Translucent dark card */ --error-color: #FF6B6B;
  }

}

/* Day/Night Manual Overrides */ body.light-theme  {
  --bg-color: #FFFFFF;
  --text-color: #1A1A1A;
  --primary-color: #003366;
  --primary-hover: #002244;
  --link-color: #0055A5;
  --link-hover: #002244;
  --card-bg: rgba(255, 255, 255, 0.92);
}

body.dark-theme  {
  --bg-color: #0A0A0A;
  --text-color: #F4F4F4;
  --primary-color: #4DA3FF;
  --primary-hover: #80BFFF;
  --link-color: #66B2FF;
  --link-hover: #99CCFF;
  --card-bg: rgba(26, 26, 30, 0.88);
}

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

body  {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text-color);
  line-height: 1.6;
  font-size: 1.125rem;
  transition: background-color 0.4s ease, color 0.4s ease;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  background-repeat: no-repeat;
}

/* Default / Dark Theme Background (Night Mode) */ body, body.dark-theme  {
  background-color: #0A0A0A;
  background-image: linear-gradient(rgba(10, 10, 10, 0.45), rgba(10, 10, 10, 0.45)), url('../images/hero-cosmic-tech.webp');
}

/* Light Theme Background (Day Mode) */ body.light-theme  {
  background-color: #FFFFFF;
  background-image: linear-gradient(rgba(255, 255, 255, 0.65), rgba(255, 255, 255, 0.65)), url('../images/hero-cosmic-light.webp');
}

/* Links */ a  {
  color: var(--link-color);
  text-decoration: underline;
}

a:hover  {
  color: var(--link-hover);
}

/* Skip Link */ .skip-link  {
  position: absolute;
  top: -10rem;
  left: 1rem;
  background: var(--primary-color);
  color: var(--bg-color);
  padding: 1rem 1.5rem;
  z-index: 1000;
  text-decoration: none;
  font-weight: bold;
  border-radius: 4px;
  transition: top 0.2s ease-in-out;
}

.skip-link:focus  {
  top: 1rem;
  outline: 3px solid var(--focus-color);
  outline-offset: 2px;
}

/* Focus States */ a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible  {
  outline: 3px solid var(--focus-color);
  outline-offset: 3px;
}

header  {
  background-color: var(--card-bg);
  border-bottom: 2px solid var(--text-color);
  padding: 1rem 2rem;
  backdrop-filter: blur(8px);
}

nav  {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-list  {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  align-items: center;
}

nav a  {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 600;
  padding: 0.5rem;
  min-height: 44px;
  min-width: 44px;
  display: inline-flex;
  align-items: center;
}

nav a:hover  {
  text-decoration: underline;
}

/* Logo Link Layout */ .logo-link  {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-color);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.3px;
  min-height: 44px;
}

.logo-link:hover  {
  text-decoration: none;
  opacity: 0.9;
}

/* Logo Link Alignment */ .logo-link  {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-color);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.3px;
  min-height: 44px;
}

.logo-link:hover  {
  text-decoration: none;
  opacity: 0.9;
}

/* Sigil Sizing */ .site-sigil-img  {
  height: 36px;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
}

/* Light Theme Sigil Swap */ body.light-theme .site-sigil-img  {
  content: url('../images/fis-sigil-light.webp');
}

/* Logo Accent Color */ .logo-accent  {
  color: var(--primary-color);
  font-weight: 400;
}

/* Sigil Image Sizing & Alignment */ .site-sigil-img  {
  height: 36px;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.logo-link:hover .site-sigil-img  {
  transform: translateY(-1px);
}

/* Dynamic Sigil Image Swap for Light Theme (Day Mode) */ body.light-theme .site-sigil-img  {
  content: url('../images/fis-sigil-light.webp');
}

/* Logo Text Accent Color */ .logo-accent  {
  color: var(--primary-color);
  font-weight: 400;
}

/* Theme Toggle Button */ .theme-toggle-btn  {
  background: transparent;
  border: 2px solid var(--text-color);
  color: var(--text-color);
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  font-weight: bold;
  cursor: pointer;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.theme-toggle-btn:hover  {
  background-color: var(--text-color);
  color: var(--bg-color);
}

main  {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

section  {
  margin-bottom: 4rem;
}

h1, h2, h3  {
  line-height: 1.3;
  margin-bottom: 1rem;
}

h1  {
  font-size: 2.5rem;
}

h2  {
  font-size: 2rem;
}

h3  {
  font-size: 1.5rem;
}

p  {
  margin-bottom: 1.5rem;
}

.btn  {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--primary-color);
  color: var(--bg-color);
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  border: none;
  border-radius: 4px;
  font-weight: bold;
  min-height: 48px;
  min-width: 48px;
  cursor: pointer;
}

.btn:hover  {
  background-color: var(--primary-hover);
  color: #FFFFFF;
}

.grid  {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.card  {
  background-color: var(--card-bg);
  padding: 2rem;
  border-radius: 8px;
  border: 1px solid var(--text-color);
  backdrop-filter: blur(6px);
}

/* Planetary Widget */ .ephemeris-grid  {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.ephemeris-card  {
  background: var(--bg-color);
  border: 1px solid var(--text-color);
  padding: 1.25rem;
  border-radius: 6px;
  text-align: center;
}

.ephemeris-card strong  {
  display: block;
  font-size: 1.2rem;
  color: var(--primary-color);
  margin-bottom: 0.25rem;
}

/* Quote/Aphorism Image Section */ .quote-banner  {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.5rem;
  padding: 3rem;
}

.quote-image  {
  max-width: 100%;
  height: auto;
  max-height: 400px;
  border-radius: 8px;
  border: 2px solid var(--text-color);
}

.quote-banner-overlay  {
  position: relative;
  border-radius: 8px;
  border: 1px solid var(--text-color);
  background: linear-gradient(rgba(10, 10, 10, 0.7), rgba(10, 10, 10, 0.7)), url('/assets/images/cosmobiology-aphorism.webp') center/cover no-repeat;
  padding: 4rem 2rem;
  text-align: center;
  overflow: hidden;
}

.quote-content blockquote  {
  font-size: 1.35rem;
  font-style: italic;
  max-width: 800px;
  margin: 0 auto 1rem auto;
  color: var(--text-color);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
}

.quote-content figcaption  {
  font-size: 0.95rem;
  font-weight: bold;
  color: var(--primary-color);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
}

footer  {
  background-color: var(--card-bg);
  border-top: 2px solid var(--text-color);
  text-align: center;
  padding: 2rem;
  margin-top: 4rem;
}

.footer-links  {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 1rem;
}

.footer-links a  {
  color: var(--text-color);
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

/* Reduced Motion Support */ @media (prefers-reduced-motion: reduce)  {
  *, ::before, ::after  {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

}

/* Hero Section - Clean Transparent Container */ .hero  {
  position: relative;
  width: 100%;
  padding: 6rem 2rem;
  margin: 0 0 2rem 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

/* Ensure text inside hero stays readable in both themes */ .hero-content h1  {
  color: var(--text-color);
  /* Light gray #F4F4F4 in dark mode, dark #1A1A1A in light mode */ text-shadow: 0 2px 8px rgba(0, 0, 0, 0.9);
  font-weight: 700;
}

.hero-content  {
  max-width: 800px;
}

/* Text shadow ensures high readability with the lighter overlay */ .hero-content p  {
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
}

.hero-subtitle  {
  color: var(--primary-color);
  /* Electric Blue #4DA3FF in dark mode */ font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}

@media (max-width: 768px)  {
  .hero  {
    padding: 2rem 1rem;
  }

  .nav-list  {
    flex-direction: column;
    gap: 0.5rem;
  }

}

/* ========================================== Header Logo & Sigil Alignment ========================================== */ .logo-link  {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-color);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.3px;
  min-height: 44px;
}

.logo-link:hover  {
  text-decoration: none;
  opacity: 0.9;
}

/* Base Sigil Image Styling */ .site-sigil-img  {
  height: 36px;
  width: auto;
  object-fit: contain;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.logo-link:hover .site-sigil-img  {
  transform: translateY(-1px);
}

/* Automatically Swap Logo for Light Theme (Day Mode) */ body.light-theme .site-sigil-img  {
  content: url('../images/fis-sigil-light.webp');
}

/* Brand Name Accent Color */ .logo-accent  {
  color: var(--primary-color);
  font-weight: 400;
}