/* ==========================================================================
   BASE WATER COMPANY — RESPONSIVE & MOBILE ADAPTATIONS
   Clean, adaptive layouts for desktop, tablet, and mobile
   ========================================================================== */

/* Tablets & Medium Desktops (<= 1024px) */
@media (max-width: 1024px) {
  .arbitrage-comparison-grid {
    grid-template-columns: 1fr;
  }

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

  .hardware-overview-card {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .stakeholders-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .thesis-cards-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 36px;
  }

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

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

  /* Mobile Navigation Collapse at <= 1024px */
  .site-header {
    height: auto;
  }

  .nav-inner {
    height: 64px;
  }

  .nav-links {
    display: none;
  }

  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(10, 14, 22, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-medium);
    padding: 24px;
    gap: 18px;
    z-index: 1001;
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.6);
    animation: slideDownNav 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .mobile-menu-btn {
    display: flex;
  }
}

@keyframes slideDownNav {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Tablets & Large Phones (<= 768px) */
@media (max-width: 768px) {
  .container,
  .container-wide {
    padding: 0 16px;
  }

  .btn {
    white-space: normal;
    text-align: center;
  }

  .site-header {
    height: auto;
  }

  .nav-inner {
    height: 60px;
  }

  .nav-links.mobile-open {
    top: 60px;
  }

  .brand-name {
    font-size: 1.05rem;
  }

  .brand-tag {
    font-size: 0.58rem;
  }

  .hero-section {
    padding: 36px 0 50px;
  }

  .hero-badge {
    font-size: 0.72rem;
    padding: 6px 14px;
    max-width: 100%;
    white-space: normal;
    text-align: center;
    line-height: 1.35;
    margin: 0 auto 20px;
  }

  .hero-title {
    font-size: 2.1rem;
    overflow-wrap: break-word;
  }

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

  .hero-highlight-strip {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 16px;
  }

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

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
    justify-content: center;
  }

  .calc-wrapper {
    padding: 18px 14px;
  }

  .calc-simple-controls {
    padding: 14px;
  }

  .calc-slider-header {
    flex-wrap: wrap;
    gap: 8px;
  }

  .calc-addons-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .calc-pill-toggle {
    font-size: 0.75rem;
    padding: 5px 10px;
  }

  .calc-cost-split-banner {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .split-divider-line {
    width: 100%;
    height: 1px;
  }

  .arbitrage-card {
    padding: 20px 16px;
  }

  .detail-row {
    font-size: 0.82rem;
  }

  .arbitrage-summary-banner {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    padding: 16px 14px;
  }

  .summary-cta-box {
    width: 100%;
  }

  .summary-cta-box .btn {
    width: 100%;
    justify-content: center;
  }

  .enclosure-switch-wrap {
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
  }

  .addon-grid-container {
    grid-template-columns: 1fr;
  }

  .intake-card {
    padding: 24px 16px;
  }

  .intake-track-selector {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .mailto-action-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .mailto-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .mailto-btn,
  .copy-btn {
    width: 100%;
    justify-content: center;
  }

  .template-preview-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .footer-inner {
    padding: 48px 16px 32px;
  }

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

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

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    margin-top: 36px;
  }
}

/* Small Mobile Screens (<= 480px) */
@media (max-width: 480px) {
  .hero-badge {
    font-size: 0.65rem;
    padding: 6px 10px;
    line-height: 1.35;
    border-radius: 16px;
  }

  .hero-title {
    font-size: 1.65rem;
    line-height: 1.2;
  }

  .hero-subtitle {
    font-size: 0.88rem;
  }

  .hero-highlight-strip {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 14px;
  }

  .metric-big {
    font-size: 1.7rem;
  }

  .summary-val {
    font-size: 1.4rem;
  }

  .detail-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }

  .modal-box {
    padding: 24px 16px;
  }

  .calc-pill-toggle {
    font-size: 0.7rem;
    padding: 4px 8px;
  }

  .enclosure-toggle-btn {
    font-size: 0.7rem;
    padding: 5px 10px;
  }
}