body { margin: 0; font-family: 'Kanit', sans-serif; }
a { color: #E2231A; text-decoration: none; }
a:hover { color: #A9160F; }
html { scroll-behavior: smooth; }

/* ---- mobile nav (hamburger) ---- */
.nav-toggle-checkbox { display: none; }
.nav-toggle-label { display: none; }

@media (max-width: 860px) {
  .site-header {
    flex-wrap: wrap;
    padding-left: 20px !important;
    padding-right: 20px !important;
  }
  .nav-toggle-label {
    display: flex !important;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    margin-left: auto;
    color: #fff;
    font-size: 26px;
    cursor: pointer;
    border-radius: 6px;
    -webkit-tap-highlight-color: transparent;
  }
  .nav-toggle-label:active {
    background: rgba(255,255,255,0.15);
  }
  .site-nav {
    display: none !important;
    flex-direction: column !important;
    align-items: stretch !important;
    width: 100% !important;
    gap: 4px !important;
    position: absolute !important;
    top: 100% !important;
    left: 0 !important;
    right: 0 !important;
    padding: 12px 20px 20px !important;
    background: #fff;
    box-shadow: 0 16px 28px rgba(0,0,0,0.4);
    border-top: 4px solid #FDC500;
    border-radius: 0 0 14px 14px;
    z-index: 60;
  }
  .nav-toggle-checkbox:checked ~ .site-nav {
    display: flex !important;
  }
  .site-nav a {
    padding: 14px 6px !important;
    border-bottom: 1px solid rgba(11,42,85,0.1);
    -webkit-tap-highlight-color: transparent;
  }
  .site-nav a:not(:last-child) {
    color: #0B2A55 !important;
    font-weight: 600 !important;
  }
  .site-nav a:not(:last-child):active {
    background: rgba(11,42,85,0.06);
  }
  .site-nav a:last-child:active {
    filter: brightness(0.85);
  }
  .site-nav a:last-child {
    border-bottom: none;
    text-align: center;
    margin-top: 10px;
  }

  /* ---- section spacing ---- */
  .hero { padding: 56px 24px 64px !important; }
  .section-pad { padding: 60px 24px !important; }
  .section-pad-sm { padding: 40px 24px !important; }
  .site-footer { padding: 28px 20px !important; }

  /* ---- typography ---- */
  .hero-title { font-size: 40px !important; }
  .section-title, .section-title-alt { font-size: 28px !important; }

  /* ---- grids: stack to a single column ---- */
  .stack-grid {
    grid-template-columns: 1fr !important;
    gap: 32px !important;
  }
  .hero-image { height: 260px !important; }
  .parts-image { height: 220px !important; }

  .tire-grid { grid-template-columns: repeat(2,1fr) !important; }
  .service-grid { grid-template-columns: repeat(2,1fr) !important; }
  .recommend-grid { grid-template-columns: repeat(2,1fr) !important; }
  .stats-grid { grid-template-columns: repeat(2,1fr) !important; gap: 20px !important; }
}

@media (max-width: 560px) {
  .hero-title { font-size: 32px !important; }
  .tire-grid { grid-template-columns: 1fr !important; }
  .service-grid { grid-template-columns: 1fr !important; }
  .recommend-grid { grid-template-columns: 1fr !important; }
  .hero { padding: 44px 18px 48px !important; }
  .section-pad { padding: 48px 18px !important; }
}