/* ═══════════════════════════════════════════════════════════════
   PetSupplementGuide — MEGA NAV + MOBILE DRAWER + EXPANDABLE FOOTER
   Structure modelled on ukhomeenergy.co.uk, styled in PSG's own
   cream / forest-green / terracotta system.
   Loaded AFTER each page's inline <style>, and selectors are kept
   specific enough to win against the inlined copy of the design
   system without resorting to !important.
   ═══════════════════════════════════════════════════════════════ */

:root {
  --nav-cream: #faf8f5;
  --nav-dark: #2d2a26;
  --nav-green: #2d5a27;
  --nav-terracotta: #c4704b;
  --nav-border: #e8e3db;
  --nav-muted: #6b6560;
  --nav-white: #ffffff;
  --nav-cta: #a8532f;
  --nav-shell: #1e1c19;
  --nav-ease: 0.22s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ── SHELL ──────────────────────────────────────────────────── */
/* A couple of pages carry no design-system reset of their own, so the
   nav/drawer/footer bring their own box model rather than assuming one. */
nav.site-nav, nav.site-nav *,
.mobile-menu, .mobile-menu *,
.site-footer .footer-grid, .site-footer .footer-grid *,
.site-footer .footer-bottom, .site-footer .footer-bottom * { box-sizing: border-box; }

nav.site-nav {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--nav-white);
  border-bottom: 2px solid var(--nav-border);
  padding: 0;
}
nav.site-nav > .container {
  display: block;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
nav.site-nav .site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 64px;
}
nav.site-nav .site-nav__logo {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 1.35rem;
  line-height: 1;
  color: var(--nav-dark);
  text-decoration: none;
  white-space: nowrap;
  flex: 0 0 auto;
}
nav.site-nav .site-nav__logo span { color: var(--nav-green); }
nav.site-nav .site-nav__logo:hover { text-decoration: none; }

nav.site-nav .site-nav__links {
  display: flex;
  align-items: center;
  gap: 0.1rem;
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: 0;
  flex: 1 1 auto;
  justify-content: center;
}
nav.site-nav .site-nav__links > li { position: static; margin: 0; }
nav.site-nav .site-nav__links > li > a {
  display: inline-block;
  padding: 8px 12px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--nav-muted);
  text-decoration: none;
  white-space: nowrap;
}
nav.site-nav .site-nav__links > li > a:hover { color: var(--nav-green); text-decoration: none; }

nav.site-nav .site-nav__cta {
  flex: 0 0 auto;
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--nav-cta);
  color: var(--nav-white);
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  text-decoration: none;
}
nav.site-nav .site-nav__cta:hover { background: #8f4527; color: var(--nav-white); text-decoration: none; }

nav.site-nav .nav-toggle {
  display: none;
  flex: 0 0 auto;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}
nav.site-nav .nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--nav-dark);
  margin: 5px 0;
}

/* ── TRIGGERS ───────────────────────────────────────────────── */
nav.site-nav .mega-trigger {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 12px;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--nav-muted);
  background: none;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--nav-ease), background var(--nav-ease);
}
nav.site-nav .mega-trigger::after {
  content: '';
  width: 7px;
  height: 7px;
  border-right: 1.6px solid currentColor;
  border-bottom: 1.6px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
  opacity: 0.5;
  transition: transform var(--nav-ease);
}
nav.site-nav .mega-trigger:hover,
nav.site-nav .mega-trigger[aria-expanded="true"] {
  color: var(--nav-green);
  background: var(--nav-cream);
}
nav.site-nav .mega-trigger[aria-expanded="true"]::after {
  transform: translateY(1px) rotate(-135deg);
  opacity: 0.85;
}
nav.site-nav .site-nav__links .current > .mega-trigger,
nav.site-nav .site-nav__links .current > a {
  color: var(--nav-green);
  font-weight: 600;
  box-shadow: inset 0 -2px 0 var(--nav-terracotta);
}

/* ── PANEL ──────────────────────────────────────────────────── */
nav.site-nav .mega {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  background: var(--nav-white);
  border-bottom: 1px solid var(--nav-border);
  box-shadow: 0 18px 40px -24px rgba(45, 42, 38, 0.35);
  z-index: 210;
}
nav.site-nav .mega[hidden] { display: none; }
nav.site-nav .mega > .container { max-width: 1140px; margin: 0 auto; padding: 0 1.5rem; }
nav.site-nav .mega-inner {
  display: grid;
  grid-template-columns: 1.15fr 1fr 1fr 1fr;
  gap: 40px;
  padding: 32px 0 28px;
}
nav.site-nav .mega-intro { display: flex; flex-direction: column; align-items: flex-start; }
nav.site-nav .mega-intro-title {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 1.3rem;
  line-height: 1.25;
  color: var(--nav-green);
  text-decoration: none;
}
nav.site-nav .mega-intro-title:hover { text-decoration: underline; text-underline-offset: 3px; }
nav.site-nav .mega-intro p {
  margin: 8px 0 0;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--nav-muted);
  max-width: 30ch;
}
nav.site-nav .mega-intro-cta {
  margin-top: auto;
  padding-top: 18px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--nav-cta);
  text-decoration: none;
}
nav.site-nav .mega-intro-cta svg { width: 13px; height: 13px; transition: transform var(--nav-ease); }
nav.site-nav .mega-intro-cta:hover { text-decoration: none; }
nav.site-nav .mega-intro-cta:hover svg { transform: translate(2px, -2px); }

nav.site-nav .mega-kicker {
  margin: 0 0 12px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--nav-terracotta);
}
nav.site-nav .mega-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 9px;
}
nav.site-nav .mega-col li { margin: 0; }
nav.site-nav .mega-col a {
  font-size: 0.875rem;
  line-height: 1.4;
  color: var(--nav-muted);
  text-decoration: none;
  transition: color var(--nav-ease);
}
nav.site-nav .mega-col a:hover { color: var(--nav-green); text-decoration: underline; text-underline-offset: 3px; }

nav.site-nav .mega-bar { background: var(--nav-cream); border-top: 1px solid var(--nav-border); }
nav.site-nav .mega-bar > .container { max-width: 1140px; margin: 0 auto; padding: 0 1.5rem; }
nav.site-nav .mega-bar-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 28px;
  padding: 13px 0;
}
nav.site-nav .mega-bar a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--nav-green);
  text-decoration: none;
}
nav.site-nav .mega-bar svg { width: 13px; height: 13px; transition: transform var(--nav-ease); }
nav.site-nav .mega-bar a:hover { color: var(--nav-cta); text-decoration: none; }
nav.site-nav .mega-bar a:hover svg { transform: translate(2px, -2px); }

/* ── MOBILE DRAWER ──────────────────────────────────────────── */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 400;
  background: var(--nav-white);
  padding: 1rem 1.5rem 3rem;
  overflow-y: auto;
  overscroll-behavior: contain;
}
.mobile-menu.open { display: block; }
.mobile-menu .mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--nav-border);
}
.mobile-menu .site-nav__logo {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 1.25rem;
  color: var(--nav-dark);
}
.mobile-menu .site-nav__logo span { color: var(--nav-green); }
.mobile-menu .mobile-close {
  background: none;
  border: none;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--nav-dark);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
}
.mobile-menu .m-acc { border-bottom: 1px solid var(--nav-border); }
.mobile-menu .m-acc > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 0;
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--nav-dark);
  cursor: pointer;
  list-style: none;
}
.mobile-menu .m-acc > summary::-webkit-details-marker { display: none; }
.mobile-menu .m-acc > summary::after {
  content: '';
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-right: 1.8px solid var(--nav-muted);
  border-bottom: 1.8px solid var(--nav-muted);
  transform: translateY(-2px) rotate(45deg);
  transition: transform var(--nav-ease);
}
.mobile-menu .m-acc[open] > summary::after { transform: translateY(2px) rotate(-135deg); }
.mobile-menu .m-acc-body { padding: 0 0 14px 2px; }
.mobile-menu .m-acc-body .mega-kicker {
  margin: 10px 0 6px;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--nav-terracotta);
}
.mobile-menu .m-acc-body ul,
.mobile-menu .m-flat {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}
.mobile-menu .m-acc-body li, .mobile-menu .m-flat li { margin: 0; }
.mobile-menu .m-acc-body a {
  display: block;
  padding: 7px 0;
  font-size: 0.92rem;
  line-height: 1.45;
  font-weight: 400;
  color: var(--nav-muted);
  text-decoration: none;
}
.mobile-menu .m-flat a {
  display: block;
  padding: 15px 0;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--nav-dark);
  text-decoration: none;
  border-bottom: 1px solid var(--nav-border);
}
.mobile-menu .mobile-cta {
  display: block;
  margin-top: 1.5rem;
  padding: 0.9rem 1rem;
  background: var(--nav-cta);
  color: var(--nav-white);
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  text-align: center;
  text-decoration: none;
}

/* ── FOOTER: 5 columns, accordion on mobile ─────────────────── */
.site-footer .footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 3rem;
}
.site-footer .footer-brand p { font-size: 0.875rem; line-height: 1.7; }
.site-footer .footer-col > summary {
  display: block;
  list-style: none;
  cursor: default;
}
.site-footer .footer-col > summary::-webkit-details-marker { display: none; }
.site-footer .footer-col > summary h4 {
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
  margin: 0 0 14px;
}
.site-footer .footer-col ul { list-style: none; margin: 0; padding: 0; }
.site-footer .footer-col ul li { margin-bottom: 0.5rem; }
.site-footer .footer-col ul a { font-size: 0.85rem; color: rgba(255, 255, 255, 0.7); text-decoration: none; }
.site-footer .footer-col ul a:hover { color: var(--nav-white); text-decoration: none; }
.site-footer .footer-bottom {
  display: block;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.5rem;
}
.site-footer .footer-bottom p { font-size: 0.8rem; color: rgba(255, 255, 255, 0.45); }
.site-footer .footer-legal { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-top: 10px; }
.site-footer .footer-legal a { font-size: 0.78rem; color: rgba(255, 255, 255, 0.55); text-decoration: none; }
.site-footer .footer-legal a:hover { color: var(--nav-white); }
.site-footer .footer-disclaimer {
  margin-top: 1.25rem;
  max-width: 82ch;
  font-size: 0.75rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.4);
}

/* ── BREAKPOINTS ────────────────────────────────────────────── */
@media (max-width: 1140px) {
  nav.site-nav .mega-inner { gap: 28px; }
  nav.site-nav .site-nav__links > li > a,
  nav.site-nav .mega-trigger { padding: 8px 8px; font-size: 0.82rem; }
}
@media (max-width: 1020px) {
  nav.site-nav .mega-inner { grid-template-columns: 1fr 1fr 1fr; gap: 28px; }
  nav.site-nav .mega-intro { grid-column: 1 / -1; }
  nav.site-nav .mega-intro p { max-width: 56ch; }
  nav.site-nav .mega-intro-cta { margin-top: 14px; padding-top: 0; }
}
@media (max-width: 900px) {
  nav.site-nav .site-nav__links { display: none; }
  nav.site-nav .site-nav__cta { display: none; }
  nav.site-nav .nav-toggle { display: block; }
  nav.site-nav .mega { display: none; }
  .site-footer .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 640px) {
  .site-footer .footer-grid { grid-template-columns: 1fr; gap: 0; margin-bottom: 28px; }
  .site-footer .footer-grid > .footer-brand { margin-bottom: 24px; }
  .site-footer .footer-col:not(.footer-brand) { border-top: 1px solid rgba(255, 255, 255, 0.09); }
  .site-footer .footer-col:not(.footer-brand) > summary {
    cursor: pointer;
    padding: 14px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  .site-footer .footer-col:not(.footer-brand) > summary h4 { margin-bottom: 0; color: rgba(255, 255, 255, 0.85); }
  .site-footer .footer-col:not(.footer-brand) > summary::after {
    margin-right: 3px;
    content: '';
    flex: 0 0 auto;
    width: 8px;
    height: 8px;
    border-right: 1.8px solid rgba(255, 255, 255, 0.5);
    border-bottom: 1.8px solid rgba(255, 255, 255, 0.5);
    transform: translateY(-2px) rotate(45deg);
    transition: transform var(--nav-ease);
  }
  .site-footer .footer-col:not(.footer-brand)[open] > summary::after { transform: translateY(2px) rotate(-135deg); }
  .site-footer .footer-col ul { padding-bottom: 16px; }
}
@media (max-width: 380px) {
  nav.site-nav > .container { padding: 0 1rem; }
  nav.site-nav .site-nav__logo { font-size: 1.15rem; }
  .mobile-menu { padding: 1rem 1rem 3rem; }
}
@media (prefers-reduced-motion: reduce) {
  nav.site-nav .mega-trigger::after,
  .mobile-menu .m-acc > summary::after,
  .site-footer .footer-col > summary::after,
  nav.site-nav .mega-bar svg,
  nav.site-nav .mega-intro-cta svg { transition: none; }
}