/* ============================================================
   DriveCost — responsive breakpoints (Organic / Natural)
   Mobile-first: 320, 375, 390, 414, 768, 1024, desktop
   ============================================================ */

/* ---------- < 768px (phones & small tablets) ---------- */
@media (max-width: 767px) {
  /* Single-column footer — base 3-col grid is too cramped on phones */
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-5); }

  /* Keep form controls tappable without iOS auto-zoom (< 16px triggers it) */
  .vs-input, .vs-select, .vs-year,
  .field input[type="number"], .field input[type="text"], .field select { font-size: 16px; }

  /* Hero CTAs stack full-width only on phones, stay inline on tablets */
  .hero-actions .btn { width: 100%; }

  /* Wide tables (5+ columns) scroll horizontally instead of squishing columns */
  .table-wrap .data-table:has(th:nth-child(5)) { min-width: 560px; }

  /* Mobile menu must not exceed the viewport on short screens */
  .mobile-menu.open { max-height: calc(100vh - 96px); overflow-y: auto; }
}

/* ---------- ≥ 600px ---------- */
@media (min-width: 600px) {
  .result-grid { grid-template-columns: 1fr; }
  .kr-cards { grid-template-columns: 1fr; }
  .comp-grid { grid-template-columns: repeat(2, 1fr); }
  .hub-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- ≥ 768px (tablet) ---------- */
@media (min-width: 768px) {
  .container { padding: 0 var(--space-5); }
  .result-grid { grid-template-columns: 1fr 1fr; }
  .kr-cards { grid-template-columns: 1fr 1fr; }
  .vp-grid { grid-template-columns: 1fr 320px; align-items: start; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .hero { padding: var(--space-8) 0; }
  .sticky-summary { display: none; }
}

/* ---------- ≥ 1024px (desktop nav) ---------- */
@media (min-width: 1024px) {
  .site-nav { display: block; }
  .nav-toggle { display: none; }
  .mobile-menu { display: none !important; }
  .feature-grid { grid-template-columns: repeat(4, 1fr); }
  .comp-grid { grid-template-columns: repeat(2, 1fr); }
  .hub-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ---------- < 1024px (mobile nav) ---------- */
@media (max-width: 1023px) {
  .site-nav { display: none; }
  .header-actions { margin-left: auto; }
  .nav-toggle { display: inline-block; }
  .header-actions .btn { display: none; }
  .sensitivity .sens-controls { grid-template-columns: 1fr; }
  .mobile-menu.open {
    display: block;
    position: absolute; top: calc(100% + 6px); left: var(--space-4); right: var(--space-4);
    background: var(--card); border: 1px solid rgba(222,216,207,.6);
    border-radius: 1.75rem; box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px); overflow-x: hidden; overflow-y: auto;
  }
  .mobile-nav-list { border-top: 1px solid rgba(222,216,207,.5); }
}

/* ---------- < 480px (phones) ---------- */
@media (max-width: 479px) {
  body { font-size: 15.5px; }
  .container { padding: 0 14px; }
  .section { padding: var(--space-6) 0; }
  .vs-row { grid-template-columns: 84px 1fr; }
  .input-grid { grid-template-columns: 1fr; }
  .calc-actions .btn { flex: 1 1 100%; }
  .result-card { padding: var(--space-4); }
  .breakdown { grid-template-columns: repeat(2, 1fr); }
  .comparison-table table { min-width: 400px; }
  .data-table th, .data-table td { padding: 10px 12px; }
  .price-row { padding: 10px 12px; }
  .vs-result .vr-sub { flex-direction: column; gap: 2px; }
  .header-inner { padding: 8px 10px 8px 18px; }
  .brand-name { font-size: 1.1rem; }
  .related-calculators-grid { grid-template-columns: 1fr; }
}

/* ---------- ≤ 360px (very narrow phones) ---------- */
@media (max-width: 360px) {
  .price-edit { flex-direction: column; align-items: stretch; width: 100%; margin-top: 6px; }
  .price-edit input { width: 100% !important; }
  .price-row { flex-direction: column; align-items: flex-start; }
}

/* ---------- ≤ 320px (smallest) ---------- */
@media (max-width: 320px) {
  .vs-row { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.7rem; }
  .breakdown { grid-template-columns: 1fr; }
  .brand-mark { width: 34px; height: 34px; }
}