/* ==========================================================================
   INSAVE HUB — RESPONSIVE & MOBILE-FIRST ERGONOMIC ADAPTATIONS
   Sky Blue & White Gradient Edition
   ========================================================================== */

/* Mobile Navigation Toggle & Bottom Dock (Hidden on Desktop) */
.mobile-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.92) 0%, rgba(224, 242, 254, 0.8) 100%);
  border: 1px solid rgba(14, 165, 233, 0.35);
  border-radius: var(--radius-xs);
  color: var(--text-primary);
  cursor: pointer;
}

.mobile-drawer {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  z-index: 99;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96) 0%, rgba(224, 242, 254, 0.94) 100%);
  backdrop-filter: var(--blur-lg);
  -webkit-backdrop-filter: var(--blur-lg);
  border-bottom: 1px solid rgba(14, 165, 233, 0.42);
  padding: var(--space-6);
  box-shadow: var(--shadow-ambient);
}

.mobile-drawer.is-open {
  display: block;
}

.mobile-bottom-dock {
  display: none;
}

/* Laptop & Compact Desktop (<= 1100px) */
@media (max-width: 1100px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .orbit-stage {
    min-height: 390px;
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

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

/* Tablet & Large Mobile (<= 860px) */
@media (max-width: 860px) {
  .nav-links,
  .nav-actions .hide-tablet {
    display: none;
  }

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

  .grid-3,
  .grid-2,
  .video-preview-layout {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }

  .main-viewport {
    padding-bottom: 6.5rem;
  }

  /* Dedicated Mobile Bottom Control Dock */
  .mobile-bottom-dock {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 98;
    height: 64px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.94) 0%, rgba(224, 242, 254, 0.94) 100%);
    backdrop-filter: var(--blur-md);
    -webkit-backdrop-filter: var(--blur-md);
    border-top: 1px solid rgba(14, 165, 233, 0.32);
    box-shadow: 0 -4px 20px rgba(14, 165, 233, 0.1);
    padding: 0 var(--space-2);
  }

  .dock-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    font-family: var(--font-mono);
    font-size: 0.66rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-secondary);
    min-height: 48px;
  }

  .dock-item.is-active,
  .dock-item:hover {
    color: var(--light-cyan);
  }
}

/* Mobile Handsets — iOS & Android (<= 600px) */
@media (max-width: 600px) {
  .container-shell {
    padding: 0 var(--space-4);
  }

  .hero-section {
    padding: var(--space-6) 0 var(--space-10);
  }

  .hero-headline {
    font-size: 2rem;
  }

  .hero-cta-group {
    flex-direction: column;
  }

  .hero-cta-group .btn-glass {
    width: 100%;
    min-height: 48px;
  }

  .hero-metrics-bar {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .orbit-ring-system {
    width: 300px;
    height: 300px;
  }

  .orbit-ring-outer {
    width: 290px;
    height: 290px;
  }

  .orbit-ring-middle {
    width: 230px;
    height: 230px;
  }

  .orbit-ring-inner {
    width: 165px;
    height: 165px;
  }

  .orbit-core-console {
    width: 270px;
    padding: var(--space-4);
  }

  .analyzer-bar {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }

  .analyzer-bar .btn-glass {
    width: 100%;
    min-height: 48px;
  }

  .result-spec-grid,
  .grid-4,
  .donation-tier-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .tier-btn,
  .btn-glass,
  .glass-input,
  .glass-select {
    min-height: 48px;
  }

  .ad-countdown-stage {
    padding: var(--space-5) var(--space-4);
  }
}