/* =========================================================================
   ANSWER INDEX PRO — SITE NAVIGATION & MOBILE DESIGN SYSTEM
   Supports: 390px - 430px base mobile viewports, Apple HIG / Material 48px tap targets,
   slide-over mobile drawer, and high-conversion sticky bottom bar.
   ========================================================================= */

:root {
  --nav-height: 72px;
  --bottom-bar-height: 64px;
  --touch-target-min: 48px;
  --touch-target-primary: 52px;

  /* Typography Scale */
  --text-hero: clamp(2rem, 6.5vw, 3.4rem);
  --text-h2: clamp(1.45rem, 4.5vw, 2.1rem);
  --text-h3: clamp(1.15rem, 3.5vw, 1.45rem);
  --text-body: 0.95rem;
  --text-body-line-height: 1.6;

  /* Brand Colors */
  --c-cobalt: #3a57fc;
  --c-cobalt-hover: #2944e8;
  --c-lime: #a7c75d;
  --c-lime-dark: #3f5518;
  --c-charcoal: #222222;
  --c-obsidian: #0c0f17;
  --c-cream: #f5f4f0;
}

/* Global Navbar Styles */
.site-navbar {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(12, 15, 23, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.75rem 1.25rem;
  transition: transform 0.25s ease;
}

.site-navbar.light-theme {
  background: rgba(245, 244, 240, 0.95);
  border-bottom: 1px solid #e2dfd5;
}

.site-nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: #ffffff;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  user-select: none;
}

.site-navbar.light-theme .site-brand {
  color: #111111;
}

.site-brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: block;
}

/* Easter Egg PRO Badge */
.site-badge-pro {
  background: rgba(58, 87, 252, 0.18);
  border: 1px solid rgba(58, 87, 252, 0.45);
  color: #9cb1ff;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  font-family: var(--font-mono, monospace);
  text-transform: uppercase;
  cursor: pointer;
  user-select: none;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
}

.site-badge-pro:hover {
  background: rgba(58, 87, 252, 0.35);
  transform: translateY(-1px);
}

.site-navbar.light-theme .site-badge-pro {
  background: #111111;
  color: #ffffff;
  border-color: #111111;
}

/* Desktop Navigation Links */
.site-nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.site-nav-links a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: color 0.15s ease;
  padding: 0.35rem 0.2rem;
}

.site-nav-links a:hover,
.site-nav-links a.active {
  color: #ffffff;
}

.site-navbar.light-theme .site-nav-links a {
  color: #555555;
}

.site-navbar.light-theme .site-nav-links a:hover,
.site-navbar.light-theme .site-nav-links a.active {
  color: #111111;
}

/* Desktop Action Buttons */
.site-nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.site-nav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.5rem 1rem;
  border-radius: 9px;
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: 40px;
  white-space: nowrap;
}

.site-nav-btn-cobalt {
  background: var(--c-cobalt);
  color: #ffffff;
  border: 1px solid var(--c-cobalt);
}

.site-nav-btn-cobalt:hover {
  background: var(--c-cobalt-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(58, 87, 252, 0.4);
}

.site-nav-btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: #ffffff;
}

.site-nav-btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
}

.site-navbar.light-theme .site-nav-btn-secondary {
  background: #ffffff;
  border-color: #d1cebe;
  color: #222222;
}

/* Hamburger Toggle Button (Minimum 48x48px tap area for Apple HIG) */
.mobile-hamburger-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: var(--touch-target-min);
  height: var(--touch-target-min);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  color: #ffffff;
  cursor: pointer;
  padding: 0;
  transition: all 0.2s;
  flex-shrink: 0;
}

.site-navbar.light-theme .mobile-hamburger-btn {
  background: #ffffff;
  border-color: #d1cebe;
  color: #111111;
}

.mobile-hamburger-btn:active {
  transform: scale(0.95);
}

/* Slide-Over Mobile Drawer */
.mobile-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 99999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

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

.mobile-drawer-card {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 86%;
  max-width: 360px;
  background: #0f1422;
  border-left: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: -10px 0 35px rgba(0, 0, 0, 0.8);
  z-index: 100000;
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  padding: 1.25rem 1.25rem calc(1.5rem + env(safe-area-inset-bottom));
  overflow-y: auto;
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 1.25rem;
}

.mobile-drawer-close {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: #94a3b8;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  cursor: pointer;
  transition: all 0.2s;
}

.mobile-drawer-close:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.15);
}

.mobile-drawer-nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex-grow: 1;
}

.mobile-drawer-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem 1rem;
  border-radius: 12px;
  color: #e2e8f0;
  text-decoration: none;
  font-size: 1.02rem;
  font-weight: 700;
  min-height: var(--touch-target-min);
  transition: all 0.15s ease;
}

.mobile-drawer-link:hover,
.mobile-drawer-link.active {
  background: rgba(58, 87, 252, 0.15);
  color: #60a5fa;
  border-left: 3px solid #3a57fc;
}

.mobile-drawer-link .icon {
  font-size: 1.2rem;
  width: 24px;
  text-align: center;
}

.mobile-drawer-footer {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* =========================================================================
   PERSISTENT STICKY MOBILE BOTTOM BAR (Base Viewport: 390px - 430px)
   Thumb-zone navigation strictly complying with Apple HIG
   ========================================================================= */
.mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 9998;
  background: rgba(12, 15, 23, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding: 0.6rem 1rem calc(0.6rem + env(safe-area-inset-bottom));
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.4);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-sticky-bar.hidden {
  transform: translateY(110%);
}

.sticky-bar-inner {
  max-width: 460px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}

.btn-sticky-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  background: linear-gradient(135deg, #3a57fc 0%, #2563eb 100%);
  color: #ffffff;
  border-radius: 12px;
  font-size: 0.88rem;
  font-weight: 800;
  text-decoration: none;
  height: 48px;
  min-height: 48px;
  box-shadow: 0 4px 14px rgba(58, 87, 252, 0.35);
  transition: transform 0.15s ease;
}

.btn-sticky-primary:active {
  transform: scale(0.97);
}

.btn-sticky-secondary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #f1f5f9;
  border-radius: 12px;
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  height: 48px;
  min-height: 48px;
  transition: transform 0.15s ease, background-color 0.2s;
}

.btn-sticky-secondary:active {
  transform: scale(0.97);
  background: rgba(255, 255, 255, 0.15);
}

/* =========================================================================
   RESPONSIVE BREAKPOINTS (Mobile-First 390px - 768px Rules)
   ========================================================================= */
@media (max-width: 900px) {
  .site-nav-links {
    display: none;
  }
  .mobile-hamburger-btn {
    display: flex;
  }
  .site-nav-actions .site-nav-btn-secondary {
    display: none;
  }
}

@media (max-width: 768px) {
  body {
    padding-bottom: calc(var(--bottom-bar-height) + 12px) !important;
  }
  .mobile-sticky-bar {
    display: block;
  }
  .site-nav-actions .site-nav-btn-cobalt {
    display: none;
  }
  .site-nav-container {
    padding: 0;
  }
}

/* Mobile swipeable card container utility */
.mobile-swipe-row {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 1rem;
  margin: 0 -1.25rem;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
  scrollbar-width: none;
}

.mobile-swipe-row::-webkit-scrollbar {
  display: none;
}

.mobile-swipe-card {
  flex: 0 0 88%;
  max-width: 340px;
  scroll-snap-align: center;
}