/**
 * Modern navigation + cross-device responsive layout
 */

:root {
  --header-h: 64px;
  --bottom-nav-h: 64px;
  --nav-panel-w: min(100vw - 2.5rem, 360px);
}

/* ===== Header shell ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  min-height: var(--header-h);
}
.header-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.65rem;
  min-height: var(--header-h);
  padding-block: 0.35rem;
}
.brand-tag { display: none; }
.brand-name { font-size: 1.05rem; }

/* Burger — mobile & tablet */
.nav-burger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--outline, var(--brand-line));
  border-radius: 12px;
  background: var(--surface, #fff);
  color: var(--on-surface, var(--brand-ink));
  cursor: pointer;
  padding: 0;
}
.nav-burger-lines {
  display: grid;
  gap: 5px;
  width: 18px;
}
.nav-burger-lines span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .2s ease, opacity .2s ease;
}
.nav-burger[aria-expanded="true"] .nav-burger-lines span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-burger[aria-expanded="true"] .nav-burger-lines span:nth-child(2) {
  opacity: 0;
}
.nav-burger[aria-expanded="true"] .nav-burger-lines span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Desktop nav hidden on small */
.nav-desktop { display: none; }
.header-search { display: none; }
.header-cta {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  justify-self: end;
}
.header-cta-btn {
  display: none;
  padding-inline: 0.9rem;
  white-space: nowrap;
}

/* Tablet+ : show CTA text */
@media (min-width: 480px) {
  .header-cta-btn { display: inline-flex; }
  .brand-tag { display: block; }
}

/* Large tablet: denser header */
@media (min-width: 768px) {
  .header-inner {
    grid-template-columns: auto auto 1fr auto;
  }
  .header-search {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.35rem;
    max-width: 280px;
    width: 100%;
    justify-self: stretch;
  }
  .header-search .input {
    min-height: 42px;
    padding: 0.55rem 0.8rem;
    border-radius: 11px;
  }
  .header-search-btn {
    min-height: 42px;
    padding-inline: 0.85rem;
    border-radius: 11px;
  }
}

/* Desktop: full primary nav, hide burger */
@media (min-width: 1100px) {
  .nav-burger { display: none; }
  .header-inner {
    grid-template-columns: auto 1fr minmax(200px, 280px) auto;
    gap: 1rem;
  }
  .nav-desktop {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.2rem;
    flex-wrap: nowrap;
  }
  .nav-desktop > a,
  .nav-more-btn {
    min-height: 40px;
    padding: 0.45rem 0.8rem;
    border-radius: 999px;
    font-size: 0.86rem;
    font-weight: 650;
    color: var(--on-surface);
  }
  .nav-desktop > a.active {
    background: color-mix(in srgb, var(--brand-accent) 14%, var(--surface-3, #e8eef3));
    color: var(--on-surface);
    box-shadow: inset 0 -2px 0 var(--brand-accent);
  }
  .nav-more-btn {
    border: 1px solid transparent;
    background: transparent;
    cursor: pointer;
    font: inherit;
  }
  .nav-more-btn:hover,
  .nav-more-btn[aria-expanded="true"] {
    background: var(--surface-3, var(--brand-mist));
  }
  .nav-more-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 220px;
    max-height: min(70vh, 480px);
    overflow: auto;
    padding: 0.55rem;
    border-radius: 14px;
    border: 1px solid var(--outline, var(--brand-line));
    background: var(--surface, #fff);
    box-shadow: var(--elev-3, var(--shadow-lg));
    z-index: 90;
  }
  .nav-more-menu .more-group-label {
    padding: 0.45rem 0.65rem 0.2rem;
    margin: 0;
  }
  .header-search { max-width: 260px; justify-self: end; }
}

/* ===== Slide-over panel (phone + tablet) ===== */
.nav-panel {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  width: var(--nav-panel-w);
  height: 100dvh;
  max-height: 100vh;
  overflow: auto;
  padding: 0.85rem 1rem calc(1.25rem + var(--safe-bottom, 0px));
  background: var(--surface, #fff);
  color: var(--on-surface);
  border-right: 1px solid var(--outline, var(--brand-line));
  box-shadow: var(--elev-3, var(--shadow-lg));
  transform: translateX(-105%);
  transition: transform .25s ease;
  -webkit-overflow-scrolling: touch;
}
.nav-panel.open {
  transform: translateX(0);
}
.nav-panel[hidden]:not(.open) {
  display: block !important;
  visibility: hidden;
  pointer-events: none;
}
.nav-panel.open {
  display: block !important;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(0);
}
.nav-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--outline, var(--brand-line));
}
.nav-panel-close {
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 12px;
  background: var(--surface-3, var(--brand-mist));
  color: var(--on-surface);
  font-size: 1.4rem;
  cursor: pointer;
}
.nav-panel-search {
  display: grid;
  gap: 0.55rem;
  margin-bottom: 1rem;
}
.nav-panel-primary {
  display: grid;
  gap: 0.25rem;
  margin-bottom: 0.75rem;
}
.nav-panel-primary a,
.nav-panel-sec a {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 0.7rem 0.85rem;
  border-radius: 12px;
  color: var(--on-surface);
  font-weight: 700;
}
.nav-panel-primary a.active {
  background: color-mix(in srgb, var(--brand-accent) 16%, transparent);
  color: var(--on-surface);
  box-shadow: inset 3px 0 0 var(--brand-accent);
}
.nav-panel-primary a:hover,
.nav-panel-sec a:hover {
  background: var(--surface-3, var(--brand-mist));
  color: var(--on-surface);
}
.nav-panel-sec {
  display: grid;
  gap: 0.15rem;
  margin-bottom: 0.5rem;
}
.nav-panel-sec a {
  font-weight: 600;
  font-size: 0.95rem;
}
.nav-panel .more-group-label {
  margin: 0.85rem 0 0.25rem;
}
.nav-panel-cta {
  margin-top: 1rem;
}

body.nav-open {
  overflow: hidden;
}
.sheet-backdrop.open {
  z-index: 95;
}

/* ===== Bottom nav ===== */
.bottom-nav {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  height: calc(var(--bottom-nav-h) + var(--safe-bottom, 0px));
  padding-bottom: var(--safe-bottom, 0px);
  z-index: 70;
}
.bottom-nav a {
  font-size: 0.68rem;
  gap: 0.15rem;
  padding-top: 0.35rem;
}
.bottom-nav svg {
  width: 22px;
  height: 22px;
}
@media (min-width: 900px) {
  .bottom-nav { display: none; }
  body { padding-bottom: 0; }
}

/* Keep bottom-nav More in sync — hide when panel exists on tablet? Keep both: burger = full, more = quick sheet */
@media (min-width: 900px) and (max-width: 1099.98px) {
  /* Tablet uses burger panel; no bottom bar */
  .more-drawer { display: none !important; }
}

/* ===== Responsive page chrome ===== */
.container {
  width: min(100% - 1.25rem, var(--container, 1160px));
}
@media (min-width: 640px) {
  .container { width: min(100% - 1.75rem, var(--container, 1160px)); }
}

/* Home rail under sticky header */
.cw-rail {
  top: var(--header-h);
}

/* Grids tighten on small screens */
@media (max-width: 639px) {
  .grid-2,
  .grid-3,
  .grid-4,
  .car-card-grid {
    grid-template-columns: 1fr !important;
  }
  .cw-type-row { grid-template-columns: repeat(2, 1fr); }
  .cw-decision-grid { grid-template-columns: 1fr; }
  .cw-brand-grid { grid-template-columns: repeat(2, 1fr); }
  .cw-compare-grid { grid-template-columns: 1fr; }
  .cw-split { grid-template-columns: 1fr; }
  .form-toolbar.cols-3-action,
  .form-toolbar.cols-2-action {
    grid-template-columns: 1fr;
  }
  .form-row.cols-2,
  .form-row.cols-3 {
    grid-template-columns: 1fr;
  }
  .calc-layout {
    grid-template-columns: 1fr;
  }
  .hero-actions .btn,
  .cw-hero-cta .btn {
    width: 100%;
  }
  .table-wrap {
    margin-inline: -0.15rem;
    border-radius: 12px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }
}

@media (min-width: 640px) and (max-width: 959px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr) !important; }
  .car-card-grid.grid-4 { grid-template-columns: repeat(2, 1fr) !important; }
}

/* Prevent horizontal page scroll */
html, body {
  overflow-x: hidden;
  max-width: 100%;
}
img, svg, video {
  max-width: 100%;
  height: auto;
}

/* Safe area for notched phones */
.site-header {
  padding-top: env(safe-area-inset-top, 0px);
}

/* More drawer polish on phones */
.more-drawer {
  z-index: 100;
}
.more-drawer.open {
  display: block;
  animation: cwSheetUp .22s ease;
}
@keyframes cwSheetUp {
  from { transform: translateY(12px); opacity: 0.6; }
  to { transform: none; opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .nav-panel,
  .nav-burger-lines span,
  .more-drawer.open {
    transition: none;
    animation: none;
  }
}