/* ==========================================================================
   AK GREEN SOLUTIONS — Comprehensive Responsive & Mobile-First Optimization
   Fluid typography, touch accessibility, vertical pipeline stepper & bottom bar
   ========================================================================== */

/* --------------------------------------------------------------------------
   Mobile Slide-out Navigation Drawer & Overlay
   -------------------------------------------------------------------------- */
.mobile-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 2400;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.mobile-drawer-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(85vw, 360px);
  height: 100%;
  background: #ffffff;
  z-index: 2500;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: -10px 0 35px rgba(15, 23, 42, 0.16);
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  gap: 1.25rem;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

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

.mobile-drawer-close {
  background: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-primary);
  cursor: pointer;
  transition: all var(--transition-normal);
}

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

.mobile-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0;
  margin: 0;
}

.mobile-nav-link {
  display: block;
  padding: 0.7rem 0.85rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-slate-900);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all var(--transition-normal);
}

.mobile-nav-link:hover,
.mobile-nav-link:active {
  background: var(--color-emerald-50);
  color: var(--color-emerald-700);
}

/* --------------------------------------------------------------------------
   Mobile Floating Action Bar (Sticky at Bottom for Phone Screens)
   -------------------------------------------------------------------------- */
.mobile-bottom-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -4px 16px rgba(15, 23, 42, 0.08);
  z-index: 1500;
  padding: 0.6rem 1rem calc(0.6rem + env(safe-area-inset-bottom));
}

.mobile-bottom-bar-inner {
  display: grid;
  grid-template-columns: 1fr 1fr 1.3fr;
  gap: 0.5rem;
  max-width: 500px;
  margin: 0 auto;
}

.mobile-bar-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  padding: 0.5rem 0.25rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: 0.72rem;
  font-weight: 700;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-slate-900);
  transition: all var(--transition-normal);
  line-height: 1.1;
  text-align: center;
}

.mobile-bar-btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.mobile-bar-btn.btn-call {
  color: var(--color-slate-900);
}

.mobile-bar-btn.btn-wa {
  color: #15803d;
  background: #f0fdf4;
  border-color: #bbf7d0;
}

.mobile-bar-btn.btn-audit {
  background: var(--color-emerald-600);
  color: #ffffff;
  border-color: var(--color-emerald-600);
}

/* --------------------------------------------------------------------------
   Laptops & Medium Desktops (<= 1200px)
   -------------------------------------------------------------------------- */
@media (max-width: 1200px) {
  .hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 2.5rem;
  }

  .cms-body-grid {
    grid-template-columns: 240px 1fr 250px;
  }
}

/* --------------------------------------------------------------------------
   Large Tablets (<= 1024px)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .hero-visual-card {
    height: 460px;
  }

  .studio-display-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .studio-photo-container {
    height: 420px;
  }

  /* CMS Dashboard Collapses to Vertical Stack */
  .cms-body-grid {
    grid-template-columns: 1fr;
  }

  .cms-sidebar {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    align-items: center;
  }

  .cms-actions-sidebar {
    border-left: none;
    border-top: 1px solid var(--color-border);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    align-items: center;
  }

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

  .trust-badges-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-top-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

/* --------------------------------------------------------------------------
   Tablets & Phablets (<= 850px)
   -------------------------------------------------------------------------- */
@media (max-width: 850px) {
  /* Hide Desktop Nav & Side Storyline HUD */
  .nav-links {
    display: none;
  }

  .mobile-nav-toggle {
    display: block;
  }

  .storyline-hud {
    display: none;
  }

  /* Show Bottom Mobile Action Bar */
  .mobile-bottom-bar {
    display: block;
  }

  body {
    padding-bottom: 65px;
  }

  /* Chapter 01 Narrative Grid */
  .narrative-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .narrative-card {
    padding: 1.75rem;
  }

  /* Chapter 03 Pipeline: Elegant Mobile Vertical Stepper */
  .pipeline-track {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    padding-left: 1.75rem;
    position: relative;
  }

  .pipeline-track::before {
    display: block !important;
    top: 15px;
    bottom: 15px;
    left: 20px;
    width: 2px;
    height: calc(100% - 30px);
    background: var(--color-emerald-200);
  }

  .pipeline-track-beam {
    display: none;
  }

  .pipeline-step-card {
    padding: 1.5rem;
  }

  .pipeline-number-bubble {
    width: 38px;
    height: 38px;
    font-size: 0.95rem;
    margin-bottom: 0.85rem;
  }

  /* Sector Blueprints Grid */
  .sectors-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .sector-card {
    padding: 1.75rem;
  }
}

/* --------------------------------------------------------------------------
   Mobile Phones (<= 640px)
   -------------------------------------------------------------------------- */
@media (max-width: 640px) {
  .container {
    padding: 0 1.15rem;
  }

  section {
    padding: 3.5rem 0;
  }

  /* Header Compact Mode */
  .site-header {
    padding: 0.75rem 1rem;
  }

  .brand-logo-badge {
    width: 32px;
    height: 32px;
  }

  .brand-logo-badge svg {
    width: 17px;
    height: 17px;
  }

  .brand-name {
    font-size: 0.98rem;
  }

  .brand-partner-badge {
    font-size: 0.6rem;
  }

  .partner-pill {
    padding: 1px 4px;
  }

  /* Hide Desktop CTA and desktop text in Header to prevent overflow */
  .site-header .trigger-site-audit-modal {
    display: none;
  }

  .desktop-only {
    display: none !important;
  }

  .audio-toggle-btn {
    width: 34px;
    height: 34px;
  }

  /* Hero Section Typography */
  .hero-section {
    padding-top: calc(var(--nav-height) + 1.25rem);
    padding-bottom: 2.5rem;
    min-height: auto;
  }

  .hero-title {
    font-size: clamp(2rem, 7.5vw, 2.6rem);
    line-height: 1.12;
  }

  .hero-description {
    font-size: 0.98rem;
    line-height: 1.65;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
    gap: 0.75rem;
  }

  .hero-actions .btn {
    width: 100%;
  }

  /* Hero Metrics Compact */
  .hero-metrics-strip {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }

  .hero-metric-item:nth-child(3) {
    grid-column: span 2;
  }

  .hero-metric-value {
    font-size: 1.65rem;
  }

  .hero-metric-label {
    font-size: 0.72rem;
  }

  /* Hero Product Image Frame */
  .hero-visual-card {
    height: clamp(300px, 48vh, 380px);
    border-radius: var(--radius-lg);
  }

  .hero-charger-overlay-hud {
    top: 0.75rem;
    left: 0.75rem;
    right: 0.75rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }

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

  /* Constrain Image Hotspot Tooltips on Mobile */
  .hotspot-tooltip {
    max-width: 190px;
    white-space: normal;
    font-size: 0.7rem;
    line-height: 1.35;
    padding: 6px 10px;
  }

  .hero-interactive-tip {
    font-size: 0.68rem;
    padding: 3px 10px;
    bottom: 0.75rem;
    width: 90%;
    justify-content: center;
  }

  /* Section Header on Mobile */
  .section-header {
    margin-bottom: 2.25rem;
  }

  .section-title {
    font-size: clamp(1.65rem, 6.5vw, 2.2rem);
    line-height: 1.15;
  }

  .section-subtitle {
    font-size: 0.92rem;
    line-height: 1.6;
  }

  /* Hardware Studio Tabs: Smooth Horizontal Swipe */
  .studio-tabs {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    flex-wrap: nowrap;
    margin-bottom: 1.25rem;
    padding: 4px;
  }

  .studio-tabs::-webkit-scrollbar {
    display: none;
  }

  .studio-tab-btn {
    white-space: nowrap;
    padding: 0.55rem 0.95rem;
    font-size: 0.82rem;
  }

  .studio-photo-container {
    height: clamp(260px, 40vh, 340px);
    border-radius: var(--radius-md);
  }

  .studio-spec-panel {
    padding: 1.5rem;
    border-radius: var(--radius-md);
  }

  .spec-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 3px;
    padding: 0.6rem 0;
  }

  .spec-value {
    font-size: 0.84rem;
  }

  /* CMS Telemetry on Mobile */
  .cms-center-stage {
    padding: 1.25rem 1rem;
  }

  .cms-chart-container {
    height: 180px;
    padding: 0.5rem;
  }

  .cms-telemetry-cards {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .cms-sidebar, .cms-actions-sidebar {
    padding: 1.25rem 1rem;
    grid-template-columns: 1fr;
  }

  /* Calculator Box on Mobile */
  .calculator-box {
    padding: 1.5rem 1.15rem;
    border-radius: var(--radius-lg);
  }

  .calc-results-col {
    padding: 1.5rem 1.15rem;
    border-radius: var(--radius-md);
  }

  .result-main-val {
    font-size: 2.1rem;
  }

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

  /* National Radar Map on Mobile */
  .map-canvas-wrapper {
    height: 340px;
    border-radius: var(--radius-lg);
  }

  .map-floating-stats {
    flex-direction: column;
    left: 0.75rem;
    bottom: 0.75rem;
    gap: 0.4rem;
  }

  .map-stat-badge {
    padding: 4px 10px;
  }

  .map-stat-val {
    font-size: 0.9rem;
  }

  /* Trust Badges on Mobile */
  .trust-badges-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .trust-badge-card {
    padding: 1.25rem;
  }

  /* Modal on Mobile */
  .modal-overlay {
    padding: 0.75rem;
  }

  .modal-content-card {
    border-radius: var(--radius-lg);
    max-height: 94vh;
  }

  .modal-header {
    padding: 1.25rem 1.25rem 1rem;
  }

  .modal-body {
    padding: 1.25rem;
  }

  .wizard-options-grid {
    grid-template-columns: 1fr;
    gap: 0.6rem;
  }

  .wizard-option-btn {
    padding: 0.9rem;
  }

  /* Footer on Mobile */
  .site-footer {
    padding: 3rem 0 1.5rem;
  }

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

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

/* --------------------------------------------------------------------------
   Small Phones (<= 380px)
   -------------------------------------------------------------------------- */
@media (max-width: 380px) {
  .hero-title {
    font-size: 1.85rem;
  }

  .hero-metrics-strip {
    grid-template-columns: 1fr;
  }

  .hero-metric-item:nth-child(3) {
    grid-column: span 1;
  }

  .btn {
    padding: 0.65rem 1rem;
    font-size: 0.85rem;
  }
}