/* ==========================================================================
   PUVIMA Consultancy — Modern Responsive Engine
   Breakpoints:
     Desktop:     > 1024px
     Tablet:      769px - 1024px
     Mobile:      <= 768px
     Small Phone: <= 480px
   ========================================================================== */

/* Prevent horizontal overflow on mobile viewports */
html,
body {
  overflow-x: hidden;
  width: 100%;
  max-width: 100%;
  -webkit-text-size-adjust: 100%;
}

/* ==========================================================================
   MOBILE NAVIGATION DRAWER & TOGGLE
   ========================================================================== */
.mobile-nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-light, #E2E8F0);
  color: var(--text-primary, #0F172A);
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm, 8px);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  padding: 8px;
  flex-shrink: 0;
  transition: all var(--duration-fast, 200ms);
}

.mobile-nav-toggle:hover {
  background: rgba(0, 114, 206, 0.08);
  border-color: var(--puvima-blue, #0072CE);
  color: var(--puvima-blue, #0072CE);
}

.mobile-nav-toggle svg {
  width: 22px;
  height: 22px;
}

.mobile-drawer {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  height: calc(100vh - 72px);
  height: calc(100dvh - 72px);
  max-height: calc(100dvh - 72px);
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 990;
  padding: 24px 20px 48px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 20px;
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease, visibility 0.35s;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  border-bottom: 1px solid var(--border-light, #E2E8F0);
}

.mobile-drawer.open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
  padding: 0;
}

.mobile-nav-link {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-secondary, #64748B);
  text-decoration: none;
  display: block;
  padding: 10px 4px;
  border-bottom: 1px solid var(--border-subtle, #F1F5F9);
  transition: color var(--duration-fast, 200ms), padding-left var(--duration-fast, 200ms);
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--puvima-blue, #0072CE);
  padding-left: 8px;
}

/* ==========================================================================
   BREAKPOINT: TABLET & SMALL DESKTOP (<= 1024px)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-content {
    max-width: 100%;
    text-align: left;
    padding-bottom: 0;
  }

  .hero-visual-wrapper {
    justify-content: center;
    align-items: flex-end;
  }

  .hero-visual-img {
    margin: 0 auto -1px auto;
    max-height: 540px;
    transform: none;
  }

  .intro-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .service-deep-columns {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .services-compact-grid,
  .principles-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-top-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px 24px;
  }

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

  .bento-overview-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   BREAKPOINT: MOBILE & SMALL TABLET (<= 768px)
   ========================================================================== */
@media (max-width: 768px) {
  /* Navigation & Header */
  .nav-wrapper,
  .header-actions > .btn {
    display: none !important;
  }

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

  .site-header {
    height: 64px;
  }

  .mobile-drawer {
    top: 64px;
    height: calc(100vh - 64px);
    height: calc(100dvh - 64px);
    max-height: calc(100dvh - 64px);
  }

  /* Section Spacing & Hierarchy */
  .section {
    padding-top: clamp(24px, 4vw, 36px);
    padding-bottom: clamp(24px, 4vw, 36px);
  }

  .section-hero {
    padding-top: calc(64px + 28px);
    padding-bottom: 40px;
  }

  .page-hero {
    padding-top: calc(64px + 32px);
    padding-bottom: 36px;
  }

  .display-headline {
    font-size: clamp(2rem, 7.5vw, 2.75rem);
  }

  .editorial-subhead {
    font-size: 1rem;
    line-height: 1.65;
  }

  /* Consultant Visual: Hidden on Mobile */
  .hero-visual-wrapper {
    display: none !important;
  }

  /* Full-width interactive touch targets */
  .btn-group {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    gap: 12px;
  }

  .btn-group .btn {
    width: 100%;
    text-align: center;
    justify-content: center;
  }

  /* Collapse Multi-Column Grids to 1 Column */
  .portfolio-grid,
  .principles-grid,
  .services-compact-grid,
  .services-catalog-grid,
  .team-roster-grid,
  .case-studies-grid,
  .testimonials-grid,
  .cross-services-grid,
  .mission-vision-grid,
  #mission-vision .container > div {
    grid-template-columns: 1fr !important;
    gap: 24px !important;
  }

  .form-grid-2 {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .meeting-format-options {
    flex-direction: column;
    gap: 12px;
  }

  .receipt-modal-content {
    padding: 24px 20px;
    width: 95%;
  }

  .receipt-meta-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .footer-bottom-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* ==========================================================================
   BREAKPOINT: COMPACT SMARTPHONES (<= 480px)
   ========================================================================== */
@media (max-width: 480px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .display-headline {
    font-size: clamp(1.85rem, 8vw, 2.35rem) !important;
    line-height: 1.18;
  }

  .section-headline {
    font-size: clamp(1.6rem, 6.5vw, 2.05rem) !important;
    line-height: 1.22;
  }

  .page-hero-title {
    font-size: clamp(1.75rem, 7.5vw, 2.2rem) !important;
    line-height: 1.2;
  }

  .page-hero-desc,
  .editorial-subhead {
    font-size: 0.95rem !important;
    line-height: 1.6;
  }

  .brand-text {
    font-size: 1.15rem;
  }

  .brand-logo-img {
    height: 34px !important;
  }

  .service-card-compact,
  .portfolio-card,
  .team-card,
  .service-card-deep,
  .channel-card {
    padding: 22px 18px !important;
  }

  .timeline-card {
    padding: 18px 0 0 0 !important;
  }

  .topic-choice-card {
    padding: 14px 12px;
  }

  .page-meta-row {
    gap: 8px;
  }

  .badge {
    font-size: 0.68rem;
    padding: 3px 8px;
  }

  #contact-cta .container > div {
    padding: 32px 18px !important;
  }

  .btn {
    padding: 12px 20px;
    font-size: 0.92rem;
  }

  .hero-spec-sep {
    display: none;
  }

  .hero-spec-pill {
    background: #F1F5F9;
    padding: 5px 12px;
    border-radius: var(--radius-sm, 6px);
    font-size: 0.82rem !important;
    border: 1px solid var(--border-light, #E2E8F0);
  }
}


/* Mobile Drawer Hierarchical Groups */
.mobile-nav-group {
  margin-bottom: 8px;
}

.mobile-group-title {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted, #94A3B8);
  margin-top: 10px;
  margin-bottom: 4px;
  padding-left: 4px;
}

.mobile-subnav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0;
}

.mobile-subnav-list .mobile-nav-link {
  font-size: 0.98rem;
  padding: 8px 6px;
  border-bottom: 1px solid var(--border-subtle, #F1F5F9);
}