/* ==========================================================================
   FUTURE POWER CAPITAL — SITE SHELL (header, nav, footer)
   ========================================================================== */

/* ---------------------------------------------------------------------
   HEADER
   --------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background: rgba(255,255,255,0.94);
  backdrop-filter: saturate(160%) blur(8px);
  border-bottom: var(--border-hairline);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: var(--space-6);
}
.site-header__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.site-header__logo svg { height: 34px; width: auto; }
.site-header__logo .wordmark {
  font-family: var(--font-serif);
  font-size: var(--text-md);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-tight);
  margin-left: var(--space-3);
  color: var(--color-text-primary);
  white-space: nowrap;
}

/* Primary nav */
.primary-nav { display: flex; flex: 1; justify-content: center; }
.primary-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.primary-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-2) 0;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  white-space: nowrap;
  transition: color var(--duration-fast);
}
.primary-nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--color-accent-strong);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-base) var(--ease-out);
}
.primary-nav__link:hover { color: var(--color-brand-primary-strong); }
.primary-nav__link:hover::after { transform: scaleX(1); }
.primary-nav__caret { width: 9px; height: 9px; flex-shrink: 0; transition: transform var(--duration-base); }
.nav-item.is-open .primary-nav__caret { transform: rotate(180deg); }

.nav-item { position: relative; }

/* Dropdown (Services) */
.nav-dropdown {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  width: 620px;
  background: var(--color-bg);
  border: var(--border-hairline);
  box-shadow: var(--shadow-xl);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-standard),
              transform var(--duration-base) var(--ease-standard),
              visibility var(--duration-base);
  z-index: 50;
}
.nav-item.is-open .nav-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.nav-dropdown__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-1) var(--space-6);
}
.nav-dropdown__link {
  display: block;
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  transition: background var(--duration-fast);
}
.nav-dropdown__link:hover { background: var(--color-surface); }
.nav-dropdown__link-title {
  display: block;
  font-family: var(--font-serif);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: 2px;
}
.nav-dropdown__link-desc {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: var(--leading-snug);
}
.nav-dropdown__footer {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: var(--border-hairline);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: var(--color-text-primary);
  transition: transform var(--duration-base) var(--ease-standard), opacity var(--duration-base);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 1100px) {
  .primary-nav { display: none; }
  .site-header__actions .btn { display: none; }
  .nav-toggle { display: flex; }
}

/* Mobile nav panel */
.mobile-nav {
  position: fixed;
  inset: var(--header-height) 0 0 0;
  background: var(--color-bg);
  z-index: 400;
  overflow-y: auto;
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-standard),
              transform var(--duration-base) var(--ease-standard),
              visibility var(--duration-base);
}
.mobile-nav.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}
.mobile-nav__list { padding: var(--space-5); }
.mobile-nav__item { border-bottom: var(--border-hairline); }
.mobile-nav__link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) var(--space-2);
  font-size: var(--text-md);
  font-family: var(--font-serif);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
}
.mobile-nav__sublist {
  display: none;
  padding: 0 var(--space-2) var(--space-3);
}
.mobile-nav__item.is-open .mobile-nav__sublist { display: block; }
.mobile-nav__item.is-open .mobile-nav__caret { transform: rotate(180deg); }
.mobile-nav__sublink {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}
.mobile-nav__sublink:hover { color: var(--color-accent-strong); }
.mobile-nav__caret { width: 11px; height: 11px; transition: transform var(--duration-base); flex-shrink: 0; }
.mobile-nav__actions { padding: var(--space-5); display: flex; flex-direction: column; gap: var(--space-3); }

@media (min-width: 1101px) {
  .mobile-nav { display: none; }
}

/* ---------------------------------------------------------------------
   FOOTER
   Trust doctrine: legal identity + Companies House link + risk warning
   present verbatim on every page.
   --------------------------------------------------------------------- */

.site-footer {
  background: var(--color-inverse-surface);
  color: var(--fpc-ink-200);
}
.site-footer__top {
  padding: var(--space-10) 0 var(--space-8);
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--space-8);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
@media (max-width: 960px) {
  .site-footer__top { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .site-footer__top { grid-template-columns: 1fr; }
}
.site-footer__brand svg { height: 30px; margin-bottom: var(--space-4); }
.site-footer__tagline { font-size: var(--text-sm); color: var(--fpc-ink-300); max-width: 280px; line-height: var(--leading-relaxed); }
.site-footer__social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  margin-top: var(--space-3);
  padding: 0;
  border: 0;
  border-radius: 0;
  color: var(--fpc-ink-200);
  transition: color var(--duration-fast), transform var(--duration-fast);
}
.site-footer__social-link:hover { color: var(--fpc-bronze-300); transform: translateY(-1px); }
.site-footer__social-link svg { display: block; }
.site-footer__heading {
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--fpc-ink-300);
  margin-bottom: var(--space-4);
}
.site-footer__list { display: flex; flex-direction: column; gap: var(--space-3); }
.site-footer__list a { font-size: var(--text-sm); color: var(--fpc-ink-100); transition: color var(--duration-fast); }
.site-footer__list a:hover { color: var(--fpc-bronze-300); }

.site-footer__legal {
  padding: var(--space-8) 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.site-footer__identity {
  font-size: var(--text-xs);
  line-height: var(--leading-relaxed);
  color: var(--fpc-ink-300);
  max-width: 820px;
}
.site-footer__identity strong { color: var(--fpc-ink-100); }
.site-footer__identity a { color: var(--fpc-bronze-300); text-decoration: underline; }

.site-footer__hours {
  margin-top: var(--space-4);
  font-size: var(--text-xs);
  color: var(--fpc-ink-200);
}
.site-footer__hours-label { color: var(--fpc-ink-100); font-weight: var(--weight-semibold); }

.site-footer__risk {
  margin-top: var(--space-5);
  padding: var(--space-4) var(--space-5);
  background: rgba(255,255,255,0.04);
  border-left: 2px solid var(--fpc-bronze-500);
  font-size: var(--text-xs);
  line-height: var(--leading-relaxed);
  color: var(--fpc-ink-200);
  max-width: 820px;
}

.site-footer__bottom {
  padding: var(--space-5) 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  font-size: var(--text-xs);
  color: var(--fpc-ink-300);
}
.site-footer__bottom-links { display: flex; gap: var(--space-5); flex-wrap: wrap; }
.site-footer__bottom-links a { color: var(--fpc-ink-300); }
.site-footer__bottom-links a:hover { color: var(--fpc-bronze-300); }