/* ==========================================================================
   Shared Components — Loader · Header · Footer · Back-to-top
   ========================================================================== */

/* ------------------------------ Loader ----------------------------------- */
#nf-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: grid;
  place-items: center;
  background: radial-gradient(120% 120% at 50% 40%, #0d2140 0%, #0a1a33 100%);
  transition: opacity 0.6s var(--ease), visibility 0.6s var(--ease);
}
#nf-loader.hide { opacity: 0; visibility: hidden; pointer-events: none; }

.loader-box { display: grid; place-items: center; gap: 1.6rem; }
.loader-ring { position: relative; width: 150px; height: 150px; }
.loader-ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.loader-ring circle { fill: none; stroke-width: 4; stroke-linecap: round; }
.loader-ring .track { stroke: rgba(255, 255, 255, 0.12); }
.loader-ring .bar {
  stroke: url(#nfGrad);
  stroke-dasharray: 440;
  stroke-dashoffset: 440;
  transition: stroke-dashoffset 0.1s linear;
}
.loader-logo {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
}
.loader-logo img { width: 92px; height: 92px; object-fit: contain; border-radius: 50%; }
.loader-logo .fallback {
  font-family: var(--font-head); font-weight: 800; font-size: 2.2rem;
  color: #fff; letter-spacing: 1px;
}
.loader-percent {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 0.15em;
}
.loader-name {
  font-family: var(--font-head);
  font-size: 0.72rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.5);
}

/* ------------------------------ Header ----------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background var(--t) var(--ease), box-shadow var(--t) var(--ease), backdrop-filter var(--t) var(--ease);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}
/* Solid + blur on scroll */
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  box-shadow: 0 6px 26px rgba(10, 26, 51, 0.08);
}

.brand { display: flex; align-items: center; gap: 0.7rem; }
.brand img { width: 52px; height: 52px; object-fit: cover; border-radius: 50%; background: #fff; }
.brand-text { display: flex; flex-direction: column; line-height: 1.05; }
.brand-text .b1 {
  font-family: var(--font-head); font-weight: 800; font-size: 1.05rem;
  color: var(--navy-800); letter-spacing: 0.01em;
}
.brand-text .b2 {
  font-size: 0.64rem; letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--steel-500); font-weight: 600;
}

/* Header colors adapt: transparent-on-top uses light text over hero */
.site-header:not(.scrolled) .brand-text .b1 { color: #fff; }
.site-header:not(.scrolled) .brand-text .b2 { color: rgba(255, 255, 255, 0.7); }
.site-header:not(.scrolled) .nav-link { color: rgba(255, 255, 255, 0.9); }
.site-header:not(.scrolled) .nav-toggle span { background: #fff; }

.main-nav ul { display: flex; align-items: center; gap: 0.4rem; }
.nav-link {
  position: relative;
  display: inline-block;
  padding: 0.6rem 1rem;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 0.94rem;
  color: var(--text);
  border-radius: var(--r-pill);
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 1rem; right: 1rem; bottom: 0.35rem;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t) var(--ease);
}
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }
.nav-link.active { color: var(--accent); }
.site-header:not(.scrolled) .nav-link.active { color: #fff; }

.header-cta { display: flex; align-items: center; gap: 0.8rem; }

/* Mobile toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.nav-toggle span {
  width: 26px; height: 2px; background: var(--navy-800); border-radius: 2px;
  transition: transform var(--t) var(--ease), opacity var(--t) var(--ease);
}
body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 940px) {
  .nav-toggle { display: flex; }
  .header-cta .btn { display: none; }
  .main-nav {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(18px);
    transform: translateX(100%);
    transition: transform var(--t) var(--ease);
    padding: 2rem var(--gutter);
  }
  body.nav-open .main-nav { transform: translateX(0); }
  .main-nav ul { flex-direction: column; align-items: flex-start; gap: 0.4rem; }
  .main-nav .nav-link { font-size: 1.2rem; padding: 0.7rem 0; color: var(--text) !important; }
  .main-nav .nav-link::after { display: none; }
  body.nav-open { overflow: hidden; }

  /* Menu must always sit on a solid, readable background — whether the page
     is at the top (header still transparent) or scrolled down. */
  body.nav-open .site-header {
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(16px) saturate(160%);
    -webkit-backdrop-filter: blur(16px) saturate(160%);
    box-shadow: 0 6px 26px rgba(10, 26, 51, 0.08);
  }
  body.nav-open .site-header .brand-text .b1 { color: var(--navy-800); }
  body.nav-open .site-header .brand-text .b2 { color: var(--steel-500); }
  body.nav-open .site-header .nav-toggle span { background: var(--navy-800); }
}

/* ------------------------------ Footer ----------------------------------- */
.site-footer {
  background: var(--grad-navy);
  color: rgba(255, 255, 255, 0.75);
  padding-top: clamp(3rem, 6vw, 5rem);
  position: relative;
  overflow: hidden;
}
.site-footer::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 480px; height: 480px;
  background: radial-gradient(circle, rgba(59, 120, 196, 0.25), transparent 70%);
  pointer-events: none;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  position: relative;
}
.footer-col h4 {
  color: #fff; font-size: 1.05rem; margin-bottom: 1.1rem;
  font-family: var(--font-head);
}
.footer-brand img { width: 58px; height: 58px; margin-bottom: 1rem; object-fit: cover; border-radius: 50%; background: #fff; }
.footer-col p { color: rgba(255, 255, 255, 0.68); font-size: 0.93rem; }
.footer-col ul { display: grid; gap: 0.65rem; }
.footer-col ul a {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.93rem;
  transition: color var(--t-fast), padding-left var(--t-fast);
}
.footer-col ul a:hover { color: #fff; padding-left: 6px; }
.footer-contact li { display: flex; gap: 0.7rem; font-size: 0.9rem; margin-bottom: 0.8rem; }
.footer-contact svg { width: 18px; height: 18px; flex-shrink: 0; color: var(--navy-400); margin-top: 3px; }

.footer-social { display: flex; gap: 0.6rem; margin-top: 1.2rem; }
.footer-social a {
  width: 40px; height: 40px; display: grid; place-items: center;
  border-radius: 50%; background: rgba(255, 255, 255, 0.09);
  transition: background var(--t-fast), transform var(--t-fast);
}
.footer-social a:hover { background: var(--navy-500); transform: translateY(-3px); }
.footer-social svg { width: 18px; height: 18px; color: #fff; }

.footer-bottom {
  margin-top: clamp(2rem, 4vw, 3rem);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-block: 1.4rem;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.6rem;
  font-size: 0.85rem;
}
.footer-bottom-right { display: flex; align-items: center; gap: 0.9rem; }
.footer-lock {
  display: grid; place-items: center;
  width: 30px; height: 30px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.55);
  transition: background var(--t-fast), color var(--t-fast), transform var(--t-fast);
  flex-shrink: 0;
}
.footer-lock svg { width: 14px; height: 14px; }
.footer-lock:hover { background: var(--navy-500); color: #fff; transform: translateY(-2px); }

@media (max-width: 860px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* --------------------------- Back to top --------------------------------- */
.to-top {
  position: fixed;
  right: 22px; bottom: 22px;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--navy-700);
  color: #fff;
  display: grid; place-items: center;
  box-shadow: var(--shadow-lg);
  opacity: 0; transform: translateY(20px) scale(0.8);
  pointer-events: none;
  transition: opacity var(--t), transform var(--t);
  z-index: 900;
}
.to-top.show { opacity: 1; transform: none; pointer-events: auto; }
.to-top:hover { background: var(--navy-500); }