/**
 * Narayanika Astro Reader - Layout, Navigation & Structural Framework
 */

/* ─────────────────────────────────────────────
   1. Container & Grid System
 ───────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(14px, 4vw, var(--space-xl));
  padding-right: clamp(14px, 4vw, var(--space-xl));
  box-sizing: border-box;
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(14px, 4vw, var(--space-xl));
  padding-right: clamp(14px, 4vw, var(--space-xl));
  box-sizing: border-box;
}

.container-xs {
  width: 100%;
  max-width: var(--container-xs);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(14px, 4vw, var(--space-xl));
  padding-right: clamp(14px, 4vw, var(--space-xl));
  box-sizing: border-box;
}

/* ─────────────────────────────────────────────
   2. Section Spacing & Backgrounds
 ───────────────────────────────────────────── */
.section {
  padding-top: clamp(var(--space-xl), 6vw, var(--space-3xl));
  padding-bottom: clamp(var(--space-xl), 6vw, var(--space-3xl));
  position: relative;
  width: 100%;
  box-sizing: border-box;
}

.section-sm {
  padding-top: clamp(var(--space-lg), 4vw, var(--space-2xl));
  padding-bottom: clamp(var(--space-lg), 4vw, var(--space-2xl));
  position: relative;
  width: 100%;
  box-sizing: border-box;
}

.section-bg-alt   { background-color: var(--bg-alt); }
.section-bg-white { background-color: var(--bg-surface); }
.section-bg-dark  { background-color: var(--bg-dark); color: var(--text-inverse); }

.section-bg-dark h1,
.section-bg-dark h2,
.section-bg-dark h3,
.section-bg-dark h4 { color: var(--text-inverse); }

.section-bg-dark p { color: var(--text-inverse-muted); }

/* ─────────────────────────────────────────────
   3. Topbar
 ───────────────────────────────────────────── */
.site-topbar {
  background-color: var(--primary-dark);
  color: var(--text-inverse-muted);
  font-size: 0.825rem;
  font-weight: 500;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 8px 0;
  width: 100%;
  position: relative;
  z-index: 1001;
}

.topbar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-xs);
  width: 100%;
}

.topbar-left,
.topbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.topbar-divider {
  color: rgba(255, 255, 255, 0.2);
}

.topbar-link {
  color: #F3D188;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition-fast);
  text-decoration: none;
}

.topbar-link:hover { color: #FFFFFF; }

/* ─────────────────────────────────────────────
   4. Sticky Header (Guaranteed Viewport Stickiness)
 ───────────────────────────────────────────── */
.site-header {
  position: -webkit-sticky;
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: var(--z-sticky);
  background-color: rgba(250, 248, 245, 0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  transition: box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(12, 19, 34, 0.10);
  background-color: rgba(250, 248, 245, 0.99);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: var(--space-md);
  width: 100%;
}

/* ─────────────────────────────────────────────
   5. Brand Logo
 ───────────────────────────────────────────── */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo svg,
.brand-logo img {
  height: 50px;
  width: auto;
  max-width: 100%;
}

.footer-col .brand-logo img,
.footer-col .brand-logo svg {
  height: 54px;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.02em;
  line-height: 1.1;
  display: flex;
  flex-direction: column;
}

.brand-tagline-sub {
  font-family: var(--font-body);
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent-dark);
}

/* ─────────────────────────────────────────────
   6. Desktop Navigation
 ───────────────────────────────────────────── */
.main-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.925rem;
  color: var(--text-main);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-dark);
  background-color: rgba(197, 154, 76, 0.10);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background-color: var(--accent-dark);
  border-radius: var(--radius-full);
}

/* ─────────────────────────────────────────────
   7. Services Dropdown
 ───────────────────────────────────────────── */
.nav-item-dropdown {
  position: relative;
}

.dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.dropdown-toggle::after {
  content: '';
  display: inline-block;
  width: 5px;
  height: 5px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  margin-top: -4px;
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.nav-item-dropdown:hover .dropdown-toggle::after,
.nav-item-dropdown:focus-within .dropdown-toggle::after {
  transform: rotate(225deg);
  margin-top: 2px;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 230px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2xs) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity var(--transition-normal),
              visibility var(--transition-normal),
              transform var(--transition-normal);
  z-index: var(--z-dropdown);
}

.nav-item-dropdown:hover .dropdown-menu,
.nav-item-dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-main);
  transition: all var(--transition-fast);
}

.dropdown-item:hover {
  background-color: var(--bg-alt);
  color: var(--accent-dark);
  padding-left: 20px;
}

.dropdown-item-icon {
  width: 18px;
  height: 18px;
  color: var(--accent-dark);
  flex-shrink: 0;
}

.dropdown-divider {
  height: 1px;
  background-color: var(--border-light);
  margin: var(--space-2xs) 0;
}

/* ─────────────────────────────────────────────
   8. Header CTA
 ───────────────────────────────────────────── */
.header-cta {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  flex-shrink: 0;
}

/* ─────────────────────────────────────────────
   9. Mobile Hamburger Toggle (High Visibility & Accessibility)
 ───────────────────────────────────────────── */
.mobile-nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 8px;
  background: var(--bg-surface);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-sm);
  cursor: pointer;
  z-index: var(--z-sticky);
  transition: border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.mobile-nav-toggle:hover {
  border-color: var(--accent-dark);
  background-color: rgba(197, 154, 76, 0.08);
}

.mobile-nav-toggle:focus-visible {
  outline: 2.5px solid var(--accent);
  outline-offset: 2px;
}

/* Target both span and .hamburger-line */
.mobile-nav-toggle span,
.mobile-nav-toggle .hamburger-line {
  display: block;
  width: 22px;
  height: 2.5px;
  background-color: var(--primary);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-normal), background-color var(--transition-fast);
  transform-origin: center;
}

.mobile-nav-toggle[aria-expanded="true"] span:nth-child(1),
.mobile-nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
  background-color: var(--accent-dark);
}

.mobile-nav-toggle[aria-expanded="true"] span:nth-child(2),
.mobile-nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
  transform: scale(0);
}

.mobile-nav-toggle[aria-expanded="true"] span:nth-child(3),
.mobile-nav-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
  background-color: var(--accent-dark);
}

/* ─────────────────────────────────────────────
   10. Mobile Navigation Drawer
 ───────────────────────────────────────────── */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(340px, 86vw);
  height: 100vh;
  background-color: var(--bg-surface);
  box-shadow: -8px 0 32px rgba(12, 19, 34, 0.2);
  z-index: var(--z-drawer);
  transform: translateX(100%);
  transition: transform var(--transition-normal);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  padding: var(--space-lg) var(--space-md);
  box-sizing: border-box;
}

.mobile-drawer.open {
  transform: translateX(0);
}

.mobile-drawer-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(12, 19, 34, 0.65);
  z-index: var(--z-overlay);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.mobile-drawer-overlay.open {
  opacity: 1;
  visibility: visible;
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--border-light);
  margin-bottom: var(--space-md);
}

.mobile-drawer-close {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  background: var(--bg-alt);
  border: 1px solid var(--border-light);
  cursor: pointer;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.mobile-drawer-close:hover {
  color: var(--primary);
  background-color: var(--border-light);
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: var(--space-lg);
}

.mobile-nav-link {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-decoration: none;
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  background-color: var(--bg-alt);
  color: var(--accent-dark);
}

.mobile-subnav {
  padding-left: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 4px 0 8px;
}

.mobile-subnav a {
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 8px 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.mobile-subnav a:hover {
  background-color: var(--bg-alt);
  color: var(--accent-dark);
}

.mobile-subnav a::before {
  content: '—';
  font-size: 0.75rem;
  color: var(--accent-dark);
  font-weight: 700;
}

.mobile-drawer-cta {
  padding: var(--space-md) 0 0;
  border-top: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  margin-top: auto;
}

/* ─────────────────────────────────────────────
   11. Section Headers (Centred)
 ───────────────────────────────────────────── */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto clamp(var(--space-lg), 4vw, var(--space-2xl));
  padding: 0 var(--space-xs);
  box-sizing: border-box;
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent-dark);
  margin-bottom: var(--space-xs);
}

.section-kicker::before,
.section-kicker::after {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1.5px;
  background: linear-gradient(to right, transparent, var(--accent-dark));
}

.section-kicker::after {
  background: linear-gradient(to left, transparent, var(--accent-dark));
}

.section-title {
  margin-bottom: var(--space-sm);
  color: var(--primary);
}

.section-description {
  font-size: 1.05rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  color: var(--text-muted);
  line-height: 1.75;
}

/* ─────────────────────────────────────────────
   12. Footer
 ───────────────────────────────────────────── */
.site-footer {
  background-color: var(--primary-dark);
  color: var(--text-inverse-muted);
  padding-top: clamp(var(--space-2xl), 6vw, var(--space-3xl));
  border-top: 1px solid var(--border-dark);
  width: 100%;
  position: relative;
  box-sizing: border-box;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1.4fr;
  gap: var(--space-2xl);
  padding-bottom: var(--space-2xl);
}

.footer-col h4 {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: #FFFFFF;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid rgba(255, 255, 255, 0.10);
}

.footer-brand-desc {
  font-size: 0.9rem;
  line-height: 1.7;
  color: #E2E8F0;
  margin-bottom: var(--space-md);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: #CBD5E1;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-links a:hover {
  color: #FFFFFF;
  padding-left: 4px;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: #E2E8F0;
  margin-bottom: var(--space-xs);
  line-height: 1.6;
}

.footer-contact-item a {
  color: #F3D188;
  font-weight: 600;
  font-size: 0.88rem;
}

.footer-contact-item a:hover {
  color: #FFFFFF;
}

.footer-contact-icon {
  font-size: 0.95rem;
  flex-shrink: 0;
  margin-top: 1px;
}

.footer-disclaimer-note {
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-md);
  font-size: 0.825rem;
  line-height: 1.7;
  color: #CBD5E1;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: var(--space-lg) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
  font-size: 0.825rem;
  color: #CBD5E1;
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-md);
}

.footer-bottom-links a {
  color: #CBD5E1;
  font-size: 0.825rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.footer-bottom-links a:hover { color: #FFFFFF; }

/* ─────────────────────────────────────────────
   13. Responsive Media Queries
 ───────────────────────────────────────────── */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }
}

@media (max-width: 991px) {
  .site-header .main-nav,
  .site-header .header-cta {
    display: none !important;
  }

  .mobile-nav-toggle {
    display: flex !important;
  }

  .nav-wrapper {
    height: 68px;
  }

  .brand-logo svg,
  .brand-logo img {
    height: 44px;
  }
}

@media (max-width: 640px) {
  .topbar-left span:not(:first-child),
  .topbar-divider,
  .topbar-right {
    display: none;
  }

  .site-topbar {
    padding: 6px 0;
    font-size: 0.78rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: var(--space-xs);
  }

  .footer-bottom-links {
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
  }
}

@media (max-width: 360px) {
  .container,
  .container-narrow,
  .container-xs {
    padding-left: 12px;
    padding-right: 12px;
  }

  .brand-logo svg,
  .brand-logo img {
    height: 38px;
  }
}