/* ==========================================================================
   GEOmetric Portfolio Management Service (P) Ltd.
   Design System & Master Stylesheet
   Theme: Super Light Minimalist with Corporate Precision
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties / Design Tokens
   -------------------------------------------------------------------------- */
:root {
  /* Color Palette */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F8FAFC;
  --bg-subtle: #F1F5F9;
  
  --nav-bg: #091932;
  --nav-bg-hover: #132746;
  --nav-text: #FFFFFF;
  --nav-text-muted: #94A3B8;
  --nav-accent: #38BDF8;
  --nav-accent-glow: rgba(56, 189, 248, 0.25);
  
  --text-primary: #0F172A;
  --text-secondary: #334155;
  --text-muted: #64748B;
  --text-highlight: #0284C7;
  
  --border-subtle: #E2E8F0;
  --border-light: #F1F5F9;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-display: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Shadows & Elevation */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.06), 0 4px 6px -4px rgba(0, 0, 0, 0.03);
  --shadow-banner: 0 8px 30px rgba(15, 23, 42, 0.06);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 350ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* --------------------------------------------------------------------------
   2. Reset & Baseline
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Skip link for accessibility */
.skip-to-content {
  position: absolute;
  top: -40px;
  left: 16px;
  background: var(--nav-bg);
  color: #fff;
  padding: 8px 16px;
  z-index: 1000;
  text-decoration: none;
  font-weight: 600;
  border-radius: 0 0 6px 6px;
  transition: top var(--transition-fast);
}
.skip-to-content:focus {
  top: 0;
}

/* Accessible hidden h1 */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------------------------
   3. Top Header (Logo Area)
   -------------------------------------------------------------------------- */
.site-header {
  width: 100%;
  background: var(--bg-primary);
  padding: 24px 20px 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 10;
}

.brand-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
  transition: transform var(--transition-normal);
}

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

.brand-logo {
  max-width: 320px;
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
  transition: filter var(--transition-normal);
}

@media (min-width: 768px) {
  .brand-logo {
    max-width: 360px;
  }
}

/* --------------------------------------------------------------------------
   4. Navigation Bar (Corporate Midnight Ribbon)
   -------------------------------------------------------------------------- */
.site-nav {
  width: 100%;
  background: var(--nav-bg);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(0, 0, 0, 0.2);
  box-shadow: 0 3px 10px rgba(9, 25, 50, 0.15);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
}

/* Mobile Toggle Button */
.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--nav-text);
  font-size: 1.25rem;
  padding: 10px;
  cursor: pointer;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-weight: 500;
  letter-spacing: 0.5px;
}

.mobile-nav-toggle:focus-visible {
  outline: 2px solid var(--nav-accent);
  outline-offset: 2px;
}

.hamburger-icon {
  width: 22px;
  height: 16px;
  position: relative;
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
}

.hamburger-icon span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: #ffffff;
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.mobile-nav-toggle[aria-expanded="true"] .hamburger-icon span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-nav-toggle[aria-expanded="true"] .hamburger-icon span:nth-child(2) {
  opacity: 0;
}
.mobile-nav-toggle[aria-expanded="true"] .hamburger-icon span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Nav Links List */
.nav-menu {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
  margin: 0;
  padding: 0;
}

.nav-item {
  display: inline-flex;
  align-items: center;
}

.nav-link {
  color: var(--nav-text);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.3px;
  padding: 12px 18px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  position: relative;
  transition: color var(--transition-fast), background-color var(--transition-fast);
  white-space: nowrap;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 6px;
  left: 18px;
  right: 18px;
  height: 2px;
  background-color: var(--nav-accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-normal);
  border-radius: 2px;
}

.nav-link:hover {
  color: var(--nav-accent);
  background-color: rgba(255, 255, 255, 0.04);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link:focus-visible {
  outline: 2px solid var(--nav-accent);
  outline-offset: -2px;
  border-radius: 4px;
}

/* External Link Indicator Icon (Subtle) */
.external-icon {
  width: 12px;
  height: 12px;
  opacity: 0.6;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-link:hover .external-icon {
  opacity: 1;
  transform: translate(1px, -1px);
}

/* Divider Pipe between links matching mockup */
.nav-separator {
  color: rgba(255, 255, 255, 0.35);
  font-weight: 300;
  font-size: 1rem;
  user-select: none;
  display: inline-block;
  padding: 0 4px;
}

/* --------------------------------------------------------------------------
   5. Hero / Body Section
   -------------------------------------------------------------------------- */
.main-content {
  flex: 1 0 auto;
  width: 100%;
  background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px 16px 40px;
}

.hero-container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-image-card {
  width: 100%;
  background: #FFFFFF;
  border-radius: 8px;
  box-shadow: var(--shadow-banner);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  transition: box-shadow var(--transition-smooth), transform var(--transition-smooth);
}

.hero-image-card:hover {
  box-shadow: 0 14px 38px rgba(15, 23, 42, 0.08);
}

.hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
  vertical-align: middle;
}

/* --------------------------------------------------------------------------
   6. Footer (Corporate Details)
   -------------------------------------------------------------------------- */
.site-footer {
  width: 100%;
  background: #FFFFFF;
  border-top: 1px solid var(--border-subtle);
  padding: 20px 20px 24px;
  margin-top: auto;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.02);
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.footer-row {
  display: block;
  margin-bottom: 4px;
}

.footer-row:last-child {
  margin-bottom: 0;
}

.footer-label {
  font-weight: 700;
  color: var(--text-primary);
  margin-right: 2px;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
  border-bottom: 1px dotted transparent;
}

.footer-link:hover {
  color: var(--text-highlight);
  border-bottom-color: var(--text-highlight);
}

.footer-link:focus-visible {
  outline: 2px solid var(--text-highlight);
  outline-offset: 2px;
  border-radius: 2px;
}

.footer-divider {
  display: inline-block;
  margin: 0 6px;
  color: #CBD5E1;
}

/* --------------------------------------------------------------------------
   7. Responsive Design (Mobile / Tablet Adjustments)
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .site-header {
    padding: 18px 16px 14px;
  }

  .brand-logo {
    max-width: 260px;
  }

  .mobile-nav-toggle {
    display: inline-flex;
    width: 100%;
    justify-content: space-between;
  }

  .nav-container {
    flex-direction: column;
    padding: 6px 16px;
  }

  .nav-menu {
    display: none;
    flex-direction: column;
    width: 100%;
    padding: 8px 0 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  .nav-menu.is-active {
    display: flex;
    animation: fadeInSlide 200ms ease-out forwards;
  }

  .nav-item {
    width: 100%;
  }

  .nav-link {
    width: 100%;
    padding: 12px 14px;
    font-size: 0.95rem;
    border-radius: 6px;
  }

  .nav-link::after {
    display: none;
  }

  .nav-separator {
    display: none;
  }

  .main-content {
    padding: 16px 12px 28px;
  }

  .hero-image-card {
    border-radius: 6px;
  }

  .footer-container {
    font-size: 0.82rem;
    line-height: 1.6;
    text-align: center;
  }

  .footer-row {
    margin-bottom: 8px;
  }

  .footer-divider {
    display: none;
  }

  .footer-item-block {
    display: block;
    margin-top: 4px;
  }
}

@keyframes fadeInSlide {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}