/* ================================================================
   NETROFUSION LABS — Layout System
   Navbar, Footer, Page Containers, Mobile Drawer
   ================================================================ */

/* ── Page Loader ── */
.nf-loader {
  position: fixed;
  inset: 0;
  background: var(--surface-0);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s var(--ease-out);
}

.nf-loader__content {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.nf-loader__logo {
  width: 56px;
  height: 56px;
  object-fit: contain;
  animation: loaderPulse 1.5s ease-in-out infinite;
}

.nf-loader__bar-track {
  width: 120px;
  height: 2px;
  background: var(--border-subtle);
  border-radius: 1px;
  margin-top: 24px;
  overflow: hidden;
}

.nf-loader__bar-fill {
  width: 100%;
  height: 100%;
  background: var(--gradient-brand-h);
  position: relative;
  left: -100%;
  animation: loaderSlide 1.2s ease-in-out infinite;
}

body.is-loading {
  overflow: hidden;
}

/* ── Navbar ── */
.nf-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 20px 0;
  transition: all var(--duration-normal) var(--ease-out);
  border-bottom: 1px solid transparent;
}

.nf-nav.is-scrolled {
  padding: 12px 0;
  background: rgba(3, 7, 18, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom-color: var(--border-subtle);
}

.nf-nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Brand */
.nf-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.nf-brand__logo {
  width: 34px;
  height: 34px;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.nf-brand__text {
  line-height: 1;
}

.nf-brand__name {
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.nf-brand__name span {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nf-brand__sub {
  display: block;
  font-size: 0.5625rem;
  font-weight: 400;
  letter-spacing: 0.25em;
  color: var(--text-muted);
  margin-top: 1px;
}

/* Desktop Nav Links */
.nf-nav__links {
  display: none;
  align-items: center;
  gap: var(--space-1);
}

@media (min-width: 1024px) {
  .nf-nav__links { display: flex; }
}

.nf-nav__link {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: color var(--duration-fast), background var(--duration-fast);
  white-space: nowrap;
}

.nf-nav__link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.nf-nav__link.is-active {
  color: var(--text-primary);
}

.nf-nav__cta {
  margin-left: var(--space-4);
}

/* Mobile Toggle */
.nf-nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 22px;
  height: 22px;
  cursor: pointer;
  position: relative;
  z-index: 1001;
}

@media (min-width: 1024px) {
  .nf-nav__toggle { display: none; }
}

.nf-nav__toggle span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: all var(--duration-normal) var(--ease-out);
  transform-origin: center;
}

.nf-nav__toggle.is-open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nf-nav__toggle.is-open span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nf-nav__toggle.is-open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile Drawer */
.nf-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 320px;
  max-width: 85vw;
  height: 100dvh;
  background: rgba(10, 15, 30, 0.97);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-left: 1px solid var(--border-subtle);
  z-index: 999;
  padding: 100px 32px 40px;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transform: translateX(100%);
  transition: transform var(--duration-normal) var(--ease-out);
}

.nf-drawer.is-open {
  transform: translateX(0);
}

.nf-drawer__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal);
}

.nf-drawer__overlay.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.nf-drawer__link {
  color: var(--text-secondary);
  font-size: var(--text-base);
  font-weight: 500;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  transition: color var(--duration-fast), background var(--duration-fast);
}

.nf-drawer__link:hover,
.nf-drawer__link.is-active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.nf-drawer__cta {
  margin-top: auto;
}

@media (min-width: 1024px) {
  .nf-drawer,
  .nf-drawer__overlay { display: none !important; }
}

/* ── Page Container ── */
.nf-page {
  min-height: 100dvh;
  padding-top: var(--navbar-height);
  opacity: 1;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.nf-page.is-transitioning {
  opacity: 0;
}

/* ── Section Container ── */
.nf-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ── Page Hero ── */
.nf-hero {
  position: relative;
  padding: 120px 0 80px;
  overflow: hidden;
}

.nf-hero--home {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding-top: 0;
}

.nf-hero__bg {
  position: absolute;
  inset: 0;
  background: var(--gradient-mesh);
  pointer-events: none;
}

.nf-hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.02) 0px, rgba(255, 255, 255, 0.02) 1px, transparent 1px, transparent 80px),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.02) 0px, rgba(255, 255, 255, 0.02) 1px, transparent 1px, transparent 80px);
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.nf-hero__content {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ── Footer ── */
.nf-footer {
  background: var(--surface-0);
  border-top: 1px solid var(--border-subtle);
  padding: 80px 0 40px;
  position: relative;
}

.nf-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.nf-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: 60px;
}

@media (max-width: 768px) {
  .nf-footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

@media (min-width: 769px) and (max-width: 1023px) {
  .nf-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}

.nf-footer__col-title {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-4);
}

.nf-footer__link {
  display: block;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  padding: 6px 0;
  transition: color var(--duration-fast);
}

.nf-footer__link:hover {
  color: var(--text-primary);
}

.nf-footer__divider {
  height: 1px;
  background: var(--border-subtle);
  margin-bottom: var(--space-8);
}

.nf-footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.nf-footer__copyright {
  font-size: var(--text-xs);
  color: var(--text-muted);
}

.nf-footer__meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: 0.6875rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

/* ── Keyframes ── */
@keyframes loaderPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.92); }
}

@keyframes loaderSlide {
  0% { left: -100%; }
  50% { left: 0; }
  100% { left: 100%; }
}