/* ============================================================
   GreenVAC — Design System (Base)
   Industrial Precision · Green Intelligence
   Shared across every template: tokens, typography, top-bar,
   main header/nav/mega-menu, footer, buttons, reveal utility.
   ============================================================ */

:root {

  --g-900: #061209;
  --g-800: #0D2116;
  --g-700: #1B5230;
  --g-600: #2D7D4A;
  --g-500: #3DAF6E;
  --g-400: #68C991;
  --g-300: #A8E0BE;
  --g-100: #EAF5EE;

  --b-900: #060D1A;
  --b-800: #0F2040;
  --b-700: #1A3D6B;
  --b-600: #2563B5;
  --b-500: #4A90D9;
  --b-100: #E8F0F8;

  --dark: #0C1A12;
  --light: #F4F7F0;
  --text-primary: #121C14;
  --text-secondary: #3D5244;
  --text-muted: #6B8175;

  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body: 'Source Sans Pro', sans-serif;
  --font-ui: 'Source Sans Pro', sans-serif;

  --shadow-card: 0 2px 4px rgba(27,82,48,.05), 0 12px 30px rgba(27,82,48,.10);
  --shadow-elevated: 0 6px 12px rgba(27,82,48,.08), 0 24px 48px rgba(27,82,48,.16);
  --shadow-floating: 0 10px 20px rgba(27,82,48,.10), 0 40px 80px rgba(27,82,48,.18);

  --ease-spring: cubic-bezier(.34,1.56,.64,1);
  --ease-out: cubic-bezier(.16,1,.3,1);
  --ease-in-out: cubic-bezier(.76,0,.24,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background: var(--light);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ── Grain Overlay ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: .6;
}

/* ── Typography ── */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.label {
  font-family: var(--font-ui);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
}

/* ── Section Header ── */
.section-eyebrow {
  font-family: var(--font-ui);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--g-600);
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: 1rem;
}
.section-eyebrow::before {
  content: '';
  display: block;
  width: 2rem;
  height: 2px;
  background: var(--g-500);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 600;
  color: var(--g-800);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.section-title span {
  font-style: italic;
  color: var(--g-600);
}

/* ══════════════════════════════════════════════
   TOP BAR
══════════════════════════════════════════════ */
#top-bar {
  background: var(--g-800);
  color: #d4e8dc;
  font-family: var(--font-ui);
  font-size: .78rem;
  letter-spacing: .04em;
  padding: .45rem 0;
}
#top-bar a {
  color: #d4e8dc;
  text-decoration: none;
  transition: color .2s;
}
#top-bar a:hover { color: var(--g-400); }

#top-bar .social-icon {
  width: 1.6rem;
  height: 1.6rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 50%;
  transition: background .2s, border-color .2s;
}
#top-bar .social-icon:hover {
  background: var(--g-600);
  border-color: var(--g-600);
}

/* ══════════════════════════════════════════════
   MAIN HEADER / NAV
══════════════════════════════════════════════ */
#main-header {
  background: #fff;
  border-bottom: 1px solid rgba(27,82,48,.08);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 20px rgba(27,82,48,.06);
  transition: box-shadow .3s;
}
#main-header.scrolled {
  box-shadow: 0 4px 30px rgba(27,82,48,.12);
}

.logo img { height: 52px; width: auto; }

/* ── Nav ── */
nav#main-nav ul { list-style: none; display: flex; gap: 0; }
nav#main-nav ul.dropdown { flex-direction: column; }

nav#main-nav > ul > li {
  position: relative;
}

nav#main-nav > ul > li > a,
nav#main-nav > ul > li > span.nav-top-link {
  display: block;
  padding: 1.5rem 1.1rem;
  font-family: var(--font-ui);
  font-size: .9rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--g-800);
  text-decoration: none;
  position: relative;
  transition: color .2s;
  cursor: pointer;
}
nav#main-nav > ul > li > a::after,
nav#main-nav > ul > li > span.nav-top-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 1.1rem;
  right: 1.1rem;
  height: 2px;
  background: var(--g-500);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s var(--ease-out);
}
nav#main-nav > ul > li:hover > a,
nav#main-nav > ul > li:hover > span.nav-top-link,
nav#main-nav > ul > li > a.active,
nav#main-nav > ul > li.current-menu-item > a,
nav#main-nav > ul > li.current-menu-ancestor > a { color: var(--g-600); }
nav#main-nav > ul > li:hover > a::after,
nav#main-nav > ul > li:hover > span.nav-top-link::after,
nav#main-nav > ul > li > a.active::after,
nav#main-nav > ul > li.current-menu-item > a::after,
nav#main-nav > ul > li.current-menu-ancestor > a::after { transform: scaleX(1); }

/* ── Dropdowns ── */
.dropdown, .mega-menu {
  position: absolute;
  top: calc(100% + 2px);
  left: 0;
  background: #fff;
  border-top: 2px solid var(--g-500);
  box-shadow: var(--shadow-elevated);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity .22s var(--ease-out), transform .22s var(--ease-out), visibility .22s;
}

nav#main-nav > ul > li:hover .dropdown,
nav#main-nav > ul > li:hover .mega-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown {
  min-width: 220px;
  padding: .5rem 0;
  border-radius: 0 0 6px 6px;
}
.dropdown li a {
  display: block;
  padding: .6rem 1.4rem;
  font-family: var(--font-ui);
  font-size: .85rem;
  letter-spacing: .04em;
  color: var(--g-800);
  text-decoration: none;
  transition: background .15s, color .15s, padding-left .15s;
}
.dropdown li a:hover,
.dropdown li.current-menu-item > a {
  background: var(--g-100);
  color: var(--g-600);
  padding-left: 1.8rem;
}

/* ── Nested flyout submenu ── */
.has-submenu {
  position: relative;
}
.dropdown .has-submenu > a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
}
.dropdown .has-submenu > a:hover {
  padding-left: 1.8rem;
}
.submenu-arrow {
  flex-shrink: 0;
  margin-left: .25rem;
  opacity: .55;
  transition: opacity .15s;
}
.has-submenu:hover .submenu-arrow { opacity: 1; }

.submenu {
  position: absolute;
  top: 0;
  left: 100%;
  min-width: 200px;
  background: #fff;
  border-top: 2px solid var(--g-500);
  border-radius: 0 6px 6px 6px;
  box-shadow: var(--shadow-elevated);
  list-style: none;
  display: flex;
  flex-direction: column;
  padding: .5rem 0;
  opacity: 0;
  visibility: hidden;
  transform: translateX(6px);
  transition: opacity .2s var(--ease-out), transform .2s var(--ease-out), visibility .2s;
}
.has-submenu:hover > .submenu {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}
.submenu li a {
  display: block;
  padding: .6rem 1.4rem;
  font-family: var(--font-ui);
  font-size: .84rem;
  letter-spacing: .04em;
  color: var(--g-800);
  text-decoration: none;
  transition: background .15s, color .15s, padding-left .15s;
  white-space: nowrap;
}
.submenu li a:hover {
  background: var(--g-100);
  color: var(--g-600);
  padding-left: 1.8rem;
}

.mega-menu {
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  width: 760px;
  padding: 2rem;
  border-radius: 0 0 8px 8px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, auto);
  column-gap: 1.75rem;
  row-gap: 1.5rem;
}
.mega-col:nth-child(n+4) {
  padding-top: 1.25rem;
  border-top: 1px solid rgba(61,175,110,.12);
}
nav#main-nav > ul > li:hover .mega-menu {
  transform: translateX(-50%) translateY(0);
}
.mega-col h5 {
  font-family: var(--font-ui);
  font-size: .7rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--g-600);
  font-weight: 700;
  margin-bottom: .75rem;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--g-100);
}
.mega-col a {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .42rem 0;
  font-size: .82rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color .15s;
  font-family: var(--font-body);
}
.mega-col a::before {
  content: '›';
  color: var(--g-500);
  font-size: 1.1rem;
  line-height: 1;
}
.mega-col a:hover,
.mega-col a.mega-active {
  color: var(--g-600);
  font-weight: 700;
}

/* Mobile menu toggle */
#menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: .5rem;
}
#menu-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--g-800);
  transition: transform .25s, opacity .25s;
}

/* ══════════════════════════════════════════════
   FOOTER
══════════════════════════════════════════════ */
#footer {
  background: var(--g-900);
  padding: 4.5rem 0 0;
  position: relative;
  overflow: hidden;
}
#footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--g-700), var(--b-700), var(--g-700));
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,.07);
}

.footer-brand img { height: 48px; margin-bottom: 1.25rem; }

.footer-brand p {
  font-size: .87rem;
  color: rgba(255,255,255,.55);
  line-height: 1.7;
  margin-bottom: 1.5rem;
  max-width: 280px;
}

.footer-socials {
  display: flex;
  gap: .6rem;
}
.footer-social-icon {
  width: 2.2rem;
  height: 2.2rem;
  border: 1px solid rgba(255,255,255,.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,.6);
  text-decoration: none;
  transition: background .2s, border-color .2s, color .2s;
}
.footer-social-icon:hover {
  background: var(--g-600);
  border-color: var(--g-600);
  color: #fff;
}

.footer-col h5 {
  font-family: var(--font-ui);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--g-400);
  margin-bottom: 1.25rem;
  padding-bottom: .65rem;
  border-bottom: 1px solid rgba(255,255,255,.07);
}

.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: .5rem; }
.footer-col ul li a {
  font-size: .85rem;
  color: rgba(255,255,255,.5);
  text-decoration: none;
  transition: color .2s, padding-left .2s;
  display: block;
}
.footer-col ul li a:hover {
  color: var(--g-400);
  padding-left: .35rem;
}

.footer-contact-item {
  display: flex;
  gap: .85rem;
  margin-bottom: 1rem;
}
.footer-contact-icon {
  color: var(--g-500);
  flex-shrink: 0;
  margin-top: .15rem;
}
.footer-contact-text {
  font-size: .84rem;
  color: rgba(255,255,255,.55);
  line-height: 1.55;
}
.footer-contact-text a {
  color: rgba(255,255,255,.55);
  text-decoration: none;
  transition: color .2s;
}
.footer-contact-text a:hover { color: var(--g-400); }

.footer-bottom {
  padding: 1.25rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-bottom p {
  font-family: var(--font-ui);
  font-size: .72rem;
  letter-spacing: .06em;
  color: rgba(255,255,255,.3);
}
.footer-bottom a { color: var(--g-500); text-decoration: none; }

/* ══════════════════════════════════════════════
   UTILITY BUTTONS
══════════════════════════════════════════════ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  background: var(--g-700);
  color: #fff;
  padding: .8rem 1.8rem;
  font-family: var(--font-ui);
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: 6px;
  transition: background .25s, box-shadow .25s, transform .2s;
  border: none;
  cursor: pointer;
}
.btn-primary:hover {
  background: var(--g-600);
  box-shadow: 0 6px 20px rgba(61,175,110,.3);
  transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(0); }
.btn-primary:focus-visible,
.btn-outline:focus-visible {
  outline: 2px solid var(--g-500);
  outline-offset: 2px;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  background: transparent;
  color: var(--g-700);
  padding: .75rem 1.75rem;
  font-family: var(--font-ui);
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1.5px solid var(--g-500);
  border-radius: 6px;
  transition: background .25s, color .25s, box-shadow .25s;
}
.btn-outline:hover {
  background: var(--g-700);
  color: #fff;
  box-shadow: 0 4px 16px rgba(27,82,48,.2);
}

/* ══════════════════════════════════════════════
   SCROLL ANIMATIONS
══════════════════════════════════════════════ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .65s var(--ease-out), transform .65s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }
.reveal-delay-4 { transition-delay: .4s; }

/* ══════════════════════════════════════════════
   RESPONSIVE (base: nav + footer)
══════════════════════════════════════════════ */
@media (max-width: 1100px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  nav#main-nav { display: none; }
  nav#main-nav.open { display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: #fff; box-shadow: var(--shadow-elevated); padding: 1rem 0; }
  nav#main-nav.open ul { flex-direction: column; }
  nav#main-nav.open > ul > li > a,
  nav#main-nav.open > ul > li > span.nav-top-link { padding: .85rem 1.5rem; }
  .dropdown, .mega-menu { position: static; box-shadow: none; border-top: none; opacity: 1; visibility: visible; transform: none; }
  .mega-menu { width: 100%; grid-template-columns: 1fr; padding: .5rem 1.5rem 1rem; }
  #menu-toggle { display: flex; }
}

@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; }
}