/* ==========================================================================
   Pashto Calculators - Responsive & Mobile-First Overrides
   ========================================================================== */

/* --- Mobile Drawer Navigation (Backdrop & Drawer) --- */
.mobile-nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 998;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.mobile-nav-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.mobile-nav-drawer {
  position: fixed;
  top: 0;
  bottom: 0;
  inset-inline-start: 0;
  width: 82%;
  max-width: 320px;
  background: var(--bg-card);
  z-index: 999;
  transform: translateX(100%); /* For RTL, inverting to slide in from right */
  transition: transform var(--transition-smooth);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  padding: 1.5rem;
  overflow-y: auto;
}

[dir="rtl"] .mobile-nav-drawer {
  transform: translateX(100%);
}

.mobile-nav-drawer.active {
  transform: translateX(0) !important;
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

.mobile-drawer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.mobile-drawer-link {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  font-weight: 700;
  color: var(--text-primary);
  transition: background-color var(--transition-fast);
}

.mobile-drawer-link:hover, .mobile-drawer-link.active {
  background-color: var(--bg-muted);
  color: var(--primary-600);
}

.mobile-drawer-link svg {
  width: 22px;
  height: 22px;
  color: var(--text-muted);
}

.mobile-drawer-footer {
  margin-top: auto;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* --- Breakpoint: Tablet & Below (< 1024px) --- */
@media (max-width: 1024px) {
  .calc-page-layout {
    grid-template-columns: 1fr;
  }

  .calc-sidebar {
    order: 2;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

  .footer-brand {
    grid-column: span 2;
  }
}

/* --- Breakpoint: Mobile (< 768px) --- */
@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .nav-links {
    display: none; /* Handled by mobile drawer */
  }

  .mobile-menu-toggle {
    display: inline-flex;
  }

  .hero-section {
    padding: 2.5rem 0 1.5rem;
  }

  .hero-title {
    font-size: 1.85rem;
  }

  .hero-description {
    font-size: 0.95rem;
  }

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

  .category-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 0.75rem;
  }

  .calc-workbench-card {
    padding: 1.35rem;
    border-radius: var(--radius-lg);
  }

  .calc-actions-row {
    flex-direction: column;
    gap: 0.75rem;
  }

  .btn-primary, .btn-secondary {
    width: 100%;
    padding: 0.95rem 1.5rem;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-brand {
    grid-column: span 1;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 0.75rem;
  }

  .calc-main-result-value {
    font-size: 2.25rem;
  }
}

/* --- Breakpoint: Small Mobile (< 480px) --- */
@media (max-width: 480px) {
  .category-grid {
    grid-template-columns: 1fr;
  }

  .calc-input {
    font-size: 1.05rem;
  }

  .calc-breakdown-grid {
    grid-template-columns: 1fr;
  }

  .quick-chips {
    justify-content: flex-start;
  }
}