/* ==========================================================================
   SPRK — 04. SITE CHROME
   Top bar · header · mega-menu · mobile drawer · footer
   ========================================================================== */

/* --------------------------------------------------------------------------
   4.1 Utility top bar
   -------------------------------------------------------------------------- */
.topbar {
  background: var(--navy-900);
  color: var(--muted-dark);
  font-size: var(--fs-sm);
  border-bottom: 1px solid rgba(255,255,255,.07);
}
.topbar__inner {
  display: flex;
  align-items: center;
  gap: var(--s-6);
  height: var(--topbar-h);
}
.topbar__item { display: inline-flex; align-items: center; gap: var(--s-2); white-space: nowrap; }
.topbar__item svg { width: 14px; height: 14px; color: var(--amber-500); flex: none; }
.topbar a { color: var(--muted-dark); }
.topbar a:hover { color: var(--amber-500); }
.topbar__right { margin-left: auto; display: inline-flex; align-items: center; gap: var(--s-5); }

.lang {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding-left: var(--s-5);
  border-left: 1px solid rgba(255,255,255,.14);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: .08em;
}
.lang button { color: var(--muted-dark); padding: 2px 4px; border-radius: 3px; transition: color var(--t) var(--ease-out); }
.lang button[aria-pressed="true"] { color: var(--amber-500); }
.lang button:hover { color: #fff; }

/* --------------------------------------------------------------------------
   4.2 Header
   -------------------------------------------------------------------------- */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  transition: box-shadow var(--t) var(--ease-out), background var(--t) var(--ease-out);
}
.header.is-stuck { box-shadow: 0 6px 22px rgba(14,42,71,.09); }

.header__inner {
  display: flex;
  align-items: center;
  gap: var(--s-7);
  height: var(--header-h);
  transition: height var(--t) var(--ease-out);
}
.header.is-stuck .header__inner { height: var(--header-h-scrolled); }

/* Logo lockup */
.logo { display: inline-flex; align-items: center; gap: var(--s-3); margin-right: auto; }
.logo__mark { width: 40px; height: 40px; flex: none; transition: width var(--t) var(--ease-out), height var(--t) var(--ease-out); }
.header.is-stuck .logo__mark { width: 34px; height: 34px; }
.logo__word { width: 96px; height: auto; color: var(--navy-800); transition: width var(--t) var(--ease-out); }
.header.is-stuck .logo__word { width: 84px; }

/* Combined mark+wordmark lockup (single SVG file) */
.logo__img { height: 40px; width: auto; display: block; transition: height var(--t) var(--ease-out); }
.header.is-stuck .logo__img { height: 32px; }
.logo__sub {
  display: block;
  font-size: 9.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--logo-grey);
  font-weight: 600;
  margin-top: 3px;
  margin-left: 15px;
  white-space: nowrap;
}
.header.is-stuck .logo__sub { display: none; }
.logo:hover .logo__word { color: var(--amber-600); }

/* Primary nav */
.nav { display: flex; align-items: center; gap: clamp(1rem, 1.6vw, 1.75rem); }
.nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding-block: 8px;
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--steel);
  white-space: nowrap;
}
.nav__link svg { width: 14px; height: 14px; transition: transform var(--t) var(--ease-out); }
.nav__link::after {
  content: "";
  position: absolute; left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--amber-500);
  transition: width var(--t) var(--ease-out);
}
.nav__link:hover,
.nav__link[aria-expanded="true"],
.nav__link.is-active { color: var(--navy-800); }
.nav__link:hover::after,
.nav__link[aria-expanded="true"]::after,
.nav__link.is-active::after { width: 100%; }
.nav__link[aria-expanded="true"] svg { transform: rotate(180deg); }

.header__cta { display: inline-flex; align-items: center; gap: var(--s-3); }

/* --------------------------------------------------------------------------
   4.3 Mega-menu
   -------------------------------------------------------------------------- */
.has-mega { position: relative; }

.mega {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  z-index: var(--z-mega);
  width: min(880px, calc(100vw - 3rem));
  padding: var(--s-7);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, -10px);
  transition:
    opacity .25s var(--ease-out),
    transform .25s var(--ease-out),
    visibility .25s;
}
.has-mega.is-open .mega { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.mega::before {
  content: "";
  position: absolute;
  top: -7px; left: 50%;
  width: 12px; height: 12px;
  transform: translateX(-50%) rotate(45deg);
  background: var(--surface);
  border-left: 1px solid var(--line);
  border-top: 1px solid var(--line);
}

.mega__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-2) var(--s-5); }
.mega__item {
  display: grid;
  grid-template-columns: 36px 1fr;
  align-items: center;
  gap: var(--s-3);
  padding: 10px;
  border-radius: var(--r-btn);
  transition: background var(--t) var(--ease-out);
}
.mega__item:hover { background: var(--bg); }
.mega__ico {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  color: var(--steel);
  transition: color var(--t) var(--ease-out), border-color var(--t) var(--ease-out), background var(--t) var(--ease-out);
}
.mega__ico svg { width: 18px; height: 18px; }
.mega__item:hover .mega__ico { color: var(--amber-600); border-color: var(--amber-500); background: var(--amber-100); }
.mega__name { display: block; font-family: var(--font-head); font-size: 1rem; font-weight: 600; color: var(--navy-800); line-height: 1.3; }
.mega__meta { display: block; margin-top: 3px; font-size: var(--fs-xs); color: var(--muted); line-height: 1.4; }

.mega__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-5);
  margin-top: var(--s-6);
  padding-top: var(--s-5);
  border-top: 1px solid var(--line);
  font-size: var(--fs-sm);
  color: var(--muted);
  flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   4.4 Mobile drawer
   -------------------------------------------------------------------------- */
.burger {
  display: none;
  width: 44px; height: 44px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--r-btn);
  color: var(--navy-800);
}
.burger span {
  display: block; width: 20px; height: 2px;
  background: currentColor;
  position: relative;
  transition: background .18s var(--ease-out);
}
.burger span::before,
.burger span::after {
  content: ""; position: absolute; left: 0;
  width: 20px; height: 2px; background: currentColor;
  transition: transform var(--t) var(--ease-out), top var(--t) var(--ease-out);
}
.burger span::before { top: -6px; }
.burger span::after  { top: 6px; }
.burger[aria-expanded="true"] span { background: transparent; }
.burger[aria-expanded="true"] span::before { top: 0; transform: rotate(45deg); }
.burger[aria-expanded="true"] span::after  { top: 0; transform: rotate(-45deg); }

.drawer-scrim {
  position: fixed; inset: 0;
  z-index: calc(var(--z-drawer) - 1);
  background: rgba(10,26,43,.55);
  backdrop-filter: blur(2px);
  opacity: 0; visibility: hidden;
  transition: opacity var(--t) var(--ease-out), visibility var(--t);
}
.drawer-scrim.is-open { opacity: 1; visibility: visible; }

.drawer {
  position: fixed;
  top: 0; right: 0; bottom: 0;
  z-index: var(--z-drawer);
  width: min(400px, 88vw);
  display: flex;
  flex-direction: column;
  background: var(--navy-900);
  color: var(--muted-dark);
  transform: translateX(100%);
  transition: transform .38s var(--ease-out);
  overflow-y: auto;
  overscroll-behavior: contain;
}
.drawer.is-open { transform: none; }
.drawer__head {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--s-4);
  padding: var(--s-5) var(--s-6);
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.drawer__close { width: 40px; height: 40px; display: grid; place-items: center; color: #fff; border: 1px solid rgba(255,255,255,.18); border-radius: var(--r-btn); }
.drawer__close:hover { background: rgba(255,255,255,.08); color: #fff; }
.drawer__body { padding: var(--s-6); display: grid; gap: var(--s-2); flex: 1; }

.drawer__link {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%;
  text-align: left;
  gap: var(--s-3);
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,.08);
  font-family: var(--font-head);
  font-size: 1.375rem;
  font-weight: 600;
  color: #fff;
}
.drawer__link:hover { color: var(--amber-500); }
.drawer__link svg { width: 18px; height: 18px; transition: transform var(--t) var(--ease-out); }
.drawer__link[aria-expanded="true"] svg { transform: rotate(180deg); color: var(--amber-500); }

.drawer__sub {
  display: grid;
  gap: 2px;
  overflow: hidden;
  max-height: 0;
  transition: max-height .4s var(--ease-out);
}
.drawer__sub.is-open { max-height: 620px; }
.drawer__sub a {
  padding: 10px 0 10px var(--s-5);
  font-size: var(--fs-sm);
  color: var(--muted-dark);
  border-left: 2px solid rgba(255,255,255,.12);
  margin-left: 2px;
}
.drawer__sub a:hover { color: var(--amber-500); border-left-color: var(--amber-500); }

.drawer__foot {
  padding: var(--s-6);
  border-top: 1px solid rgba(255,255,255,.1);
  display: grid;
  gap: var(--s-4);
}
.drawer__contact { display: grid; gap: var(--s-3); font-size: var(--fs-sm); }
.drawer__contact a,
.drawer__addr {
  color: var(--muted-dark);
  display: grid;
  grid-template-columns: 15px 1fr;
  gap: var(--s-3);
  align-items: start;
  line-height: 1.5;
}
.drawer__contact svg { width: 15px; height: 15px; color: var(--amber-500); margin-top: 3px; }

/* --------------------------------------------------------------------------
   4.5 Footer
   -------------------------------------------------------------------------- */
.footer {
  position: relative;
  background: var(--navy-800);
  color: var(--muted-dark);
  padding-top: var(--s-13);
  overflow: hidden;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr 1.3fr;
  gap: var(--s-8) var(--s-7);
  padding-bottom: var(--s-12);
}
.footer__brand { display: grid; gap: var(--s-5); align-content: start; }
.footer__logo { width: 168px; height: auto; }
.footer__about { font-size: var(--fs-sm); line-height: 1.7; max-width: 34ch; }

.footer__title {
  font-family: var(--font-head);
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: #fff;
  margin-bottom: var(--s-5);
}
.footer__list { display: grid; gap: 11px; font-size: var(--fs-sm); }
.footer__list a { color: var(--muted-dark); display: inline-flex; align-items: center; gap: var(--s-2); }
.footer__list a::before {
  content: "";
  width: 0; height: 1px;
  background: var(--amber-500);
  transition: width var(--t) var(--ease-out);
}
.footer__list a:hover { color: var(--amber-500); }
.footer__list a:hover::before { width: 12px; }

.footer__contact { display: grid; gap: var(--s-4); font-size: var(--fs-sm); }
.footer__contact li { display: grid; grid-template-columns: 18px 1fr; gap: var(--s-3); align-items: start; }
.footer__contact svg { width: 18px; height: 18px; color: var(--amber-500); margin-top: 3px; }
.footer__contact a { color: var(--muted-dark); }
.footer__contact a:hover { color: var(--amber-500); }

.trust-badges { display: flex; flex-wrap: wrap; gap: var(--s-3); }

.socials { display: flex; gap: var(--s-3); }
.socials a {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: var(--r-sm);
  color: var(--muted-dark);
  transition: all var(--t) var(--ease-out);
}
.socials svg { width: 17px; height: 17px; }
.socials a:hover { background: var(--amber-500); border-color: var(--amber-500); color: var(--ink); transform: translateY(-2px); }

.footer__bar {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-block: var(--s-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-5);
  flex-wrap: wrap;
  font-size: var(--fs-xs);
}
.footer__legal { display: flex; gap: var(--s-5); flex-wrap: wrap; }
.footer__legal a { color: var(--muted-dark); }
.footer__legal a:hover { color: var(--amber-500); }