/* ============================================================
   HASMAN ENTERPRISE SOLUTIONS — assets/css/layout.css
   Grid system, navbar, footer, page structure
   ============================================================ */

/* ── Grid System ────────────────────────────────────────────── */
.grid {
  display: grid;
  gap: var(--sp-8);
}
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--auto-fill-280 { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.grid--auto-fill-320 { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }

/* Asymmetric splits */
.grid--60-40 { grid-template-columns: 60fr 40fr; }
.grid--40-60 { grid-template-columns: 40fr 60fr; }

/* ── Navbar ─────────────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-navbar);
  height: var(--navbar-height);
  transition:
    background var(--duration-slow) var(--ease-out),
    box-shadow  var(--duration-slow) var(--ease-out),
    backdrop-filter var(--duration-slow) var(--ease-out);
}

/* Transparent on top of hero */
.site-header:not(.is-scrolled) {
  background: transparent;
}

/* Solid once scrolled */
.site-header.is-scrolled {
  background: var(--color-navy);
  box-shadow: 0 2px 24px rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.navbar__brand img {
  height: 48px;
  width: auto;
  display: block;
  transition: opacity var(--duration-fast) var(--ease-out);
}
.navbar__brand:hover img { opacity: 0.85; }

/* Desktop nav links */
.navbar__links {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  list-style: none;
}

.nav__link {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  color: rgba(255,255,255,0.9);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  position: relative;
  transition: color var(--duration-fast) var(--ease-out);
  letter-spacing: 0.01em;
}
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: var(--sp-3);
  right: var(--sp-3);
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-base) var(--ease-out);
}
.nav__link:hover,
.nav__link--active { color: #fff; }
.nav__link:hover::after,
.nav__link--active::after { transform: scaleX(1); }

/* Services dropdown */
.nav__dropdown { position: relative; }
.nav__dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 220px;
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  border-top: 3px solid var(--accent);
  overflow: hidden;
  list-style: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition:
    opacity    var(--duration-base) var(--ease-out),
    transform  var(--duration-base) var(--ease-out),
    visibility var(--duration-base);
  z-index: var(--z-dropdown);
}
.nav__dropdown:hover .nav__dropdown-menu,
.nav__dropdown:focus-within .nav__dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav__dropdown-link {
  display: block;
  padding: var(--sp-3) var(--sp-5);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-primary);
  transition: background var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);
}
.nav__dropdown-link:hover {
  background: var(--color-sky-light);
  color: var(--color-navy);
  padding-left: var(--sp-6);
}

/* CTA button */
.navbar__cta {
  margin-left: var(--sp-4);
  white-space: nowrap;
  flex-shrink: 0;
}

/* Hamburger */
.navbar__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--sp-2);
  cursor: pointer;
}
.hamburger__line {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition-base);
}
.navbar__hamburger.is-active .hamburger__line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.navbar__hamburger.is-active .hamburger__line:nth-child(2) {
  opacity: 0;
  transform: translateX(-8px);
}
.navbar__hamburger.is-active .hamburger__line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile Menu ────────────────────────────────────────────── */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--color-navy-dark);
  z-index: calc(var(--z-navbar) - 1);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity     var(--duration-slow) var(--ease-out),
    visibility  var(--duration-slow);
}
.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu__close {
  position: absolute;
  top: var(--sp-6);
  right: var(--sp-6);
  font-size: 2rem;
  color: #fff;
  opacity: 0.7;
  transition: opacity var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);
}
.mobile-menu__close:hover { opacity: 1; transform: rotate(90deg); }

.mobile-menu__links { list-style: none; text-align: center; }
.mobile-menu__link {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  padding: var(--sp-4) var(--sp-8);
  transition: color var(--duration-fast) var(--ease-out);
}
.mobile-menu__link:hover,
.mobile-menu__link.is-active { color: var(--accent); }
.mobile-menu__link--sub {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.55);
  padding-block: var(--sp-2);
}
.mobile-menu__link--sub:hover { color: var(--accent); }
.mobile-menu__link--cta {
  color: var(--accent);
  border: 2px solid var(--accent);
  border-radius: var(--radius-full);
  margin-top: var(--sp-4);
  padding-inline: var(--sp-8);
}
.mobile-menu__link--cta:hover {
  background: var(--accent);
  color: var(--color-white);
}

/* Main content offset for fixed navbar */
main { padding-top: var(--navbar-height); }
/* Pages with full hero (100vh) don't need this */
main.has-full-hero { padding-top: 0; }

/* ── Footer ─────────────────────────────────────────────────── */
.site-footer {
  background: var(--color-navy);
  color: var(--color-white);
}
.footer__inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--sp-8);
  padding-top: var(--sp-16);
  padding-bottom: var(--sp-12);
}

.footer__col--brand { padding-right: var(--sp-6); }

.footer__tagline {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.65);
  line-height: var(--leading-loose);
  margin-top: var(--sp-4);
  margin-bottom: var(--sp-5);
}

.footer__social {
  display: flex;
  gap: var(--sp-3);
}
.footer__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.75);
  transition: background var(--duration-base) var(--ease-out), color var(--duration-base) var(--ease-out), transform var(--duration-fast) var(--ease-spring);
}
.footer__social a:hover {
  background: var(--accent);
  color: var(--color-white);
  transform: translateY(-2px);
}

.footer__heading {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--sp-5);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid rgba(0, 176, 240, 0.3);
}

.footer__col ul { display: flex; flex-direction: column; gap: var(--sp-2); }
.footer__link {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.65);
  transition: color var(--duration-fast) var(--ease-out), padding-left var(--duration-fast) var(--ease-out);
  display: block;
  padding: 2px 0;
}
.footer__link:hover {
  color: var(--accent);
  padding-left: var(--sp-2);
}

.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.65);
  margin-bottom: var(--sp-3);
}
.footer__contact-item svg {
  flex-shrink: 0;
  color: var(--accent);
  margin-top: 2px;
}
.footer__contact-item .footer__link { padding: 0; }
.footer__contact-item .footer__link:hover { padding: 0; }

/* Bottom bar */
.footer__bottom {
  border-top: 1px solid var(--accent);
  padding-block: var(--sp-5);
}
.footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
}
.footer__copy,
.footer__credit {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.45);
}
.footer__credit { font-style: italic; }

/* ── Scroll-to-Top ──────────────────────────────────────────── */
.scroll-top {
  position: fixed;
  bottom: var(--sp-8);
  right: var(--sp-6);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--accent);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sky);
  z-index: var(--z-sticky);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition:
    opacity     var(--duration-base) var(--ease-out),
    visibility  var(--duration-base),
    transform   var(--duration-base) var(--ease-spring),
    background  var(--duration-fast) var(--ease-out);
}
.scroll-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.scroll-top:hover {
  background: var(--color-navy);
  transform: translateY(-2px) scale(1.1);
}

/* ── Responsive: Tablet ─────────────────────────────────────── */
@media (max-width: 1023px) {
  .navbar__links  { display: none; }
  .navbar__cta    { display: none; }
  .navbar__hamburger { display: flex; }

  .footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-10);
  }
  .footer__col--brand { grid-column: 1 / -1; padding-right: 0; }

  .grid--3 { grid-template-columns: 1fr 1fr; }
  .grid--4 { grid-template-columns: 1fr 1fr; }
  .grid--60-40,
  .grid--40-60 { grid-template-columns: 1fr; }
}

/* ── Responsive: Mobile ─────────────────────────────────────── */
@media (max-width: 639px) {
  .footer__inner { grid-template-columns: 1fr; }
  .footer__bottom-inner { flex-direction: column; text-align: center; }
  .grid--2 { grid-template-columns: 1fr; }
  .grid--3 { grid-template-columns: 1fr; }
  .grid--4 { grid-template-columns: 1fr; }
}