/* ==========================================================================
   NIGHTWING — COMPONENTS
   Navbar, mobile menu, loader, custom cursor, scroll progress, scroll-top.
   ========================================================================== */

/* ---- Loader -------------------------------------------------------------- */
.loader {
  position: fixed; inset: 0;
  z-index: var(--z-loader);
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-5);
  transition: opacity var(--dur-slow) var(--ease-out), visibility var(--dur-slow);
}
.loader.is-hidden { opacity: 0; visibility: hidden; pointer-events: none; }

.loader-wing {
  width: 92px; height: auto;
  animation: wing-breathe 2.2s ease-in-out infinite;
}
.loader-wing path { stroke: var(--color-accent-bright); }

.loader-word {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.3em;
  font-size: var(--fs-sm);
  color: var(--grey-300);
}
.loader-track {
  width: 180px; height: 2px;
  background: var(--ink-800);
  border-radius: var(--r-pill);
  overflow: hidden;
}
.loader-fill {
  height: 100%; width: 0%;
  background: var(--grad-accent);
  transition: width var(--dur-base) var(--ease-out);
}

/* ---- Scroll progress bar -------------------------------------------------- */
.scroll-progress {
  position: fixed; top: 0; left: 0;
  height: 3px; width: 0%;
  background: var(--grad-accent);
  z-index: var(--z-nav);
  box-shadow: 0 0 10px rgba(62,143,232,0.6);
}

/* ---- Custom cursor (desktop, pointer:fine only) --------------------------- */
.cursor-dot, .cursor-ring {
  position: fixed;
  top: 0; left: 0;
  pointer-events: none;
  z-index: var(--z-cursor);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  will-change: transform;
}
.cursor-dot { width: 6px; height: 6px; background: var(--color-accent-bright); }
.cursor-ring {
  width: 34px; height: 34px;
  border: 1.5px solid rgba(62,143,232,0.55);
  transition: width var(--dur-fast) var(--ease-out), height var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out);
}
.cursor-ring.is-active {
  width: 54px; height: 54px;
  background: rgba(20,112,214,0.12);
  border-color: var(--color-accent-bright);
}
@media (pointer: coarse), (hover: none) {
  .cursor-dot, .cursor-ring { display: none; }
}

/* ---- Navbar -------------------------------------------------------------- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: var(--z-nav);
  padding-block: var(--sp-4);
  transition: padding var(--dur-base) var(--ease-out), background var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out), backdrop-filter var(--dur-base) var(--ease-out);
  border-bottom: 1px solid transparent;
}
.navbar.is-scrolled {
  padding-block: var(--sp-3);
  background: rgba(5,7,11,0.72);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom-color: var(--color-border);
}

.nav-inner {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
}

.brand { display: flex; align-items: center; gap: var(--sp-3); }
.brand-mark { width: 34px; height: 34px; flex-shrink: 0; }
.brand-mark img { width: 100%; height: 100%; object-fit: contain; }
.brand-word {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-md);
  letter-spacing: 0.02em;
}
.brand-word .b-wing { color: var(--color-accent-bright); }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-7);
}
.nav-link {
  position: relative;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--grey-300);
  padding-block: var(--sp-1);
  transition: color var(--dur-fast) var(--ease-out);
}
.nav-link::after {
  content: '';
  position: absolute; left: 0; right: 100%; bottom: -4px;
  height: 2px;
  background: var(--grad-accent);
  transition: right var(--dur-base) var(--ease-out);
  border-radius: var(--r-pill);
}
.nav-link:hover, .nav-link.is-active { color: var(--white); }
.nav-link:hover::after, .nav-link.is-active::after { right: 0; }

.nav-actions { display: flex; align-items: center; gap: var(--sp-4); }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
  background: var(--ink-900);
  border: 1px solid var(--color-border);
  border-radius: var(--r-md);
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span {
  width: 18px; height: 2px;
  background: var(--white);
  border-radius: var(--r-pill);
  transition: transform var(--dur-base) var(--ease-out), opacity var(--dur-base) var(--ease-out);
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- Mobile menu (full-screen premium panel) ------------------------------ */
.mobile-menu {
  position: fixed; inset: 0;
  z-index: calc(var(--z-nav) - 1);
  background: rgba(5,7,11,0.98);
  backdrop-filter: blur(22px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--sp-9) var(--sp-6);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: transform var(--dur-slow) var(--ease-in-out), opacity var(--dur-slow) var(--ease-out), visibility var(--dur-slow);
}
.mobile-menu.is-open { transform: translateY(0); opacity: 1; visibility: visible; }

.mobile-links { display: flex; flex-direction: column; gap: var(--sp-2); }
.mobile-link {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 8vw, 2.4rem);
  font-weight: 600;
  padding-block: var(--sp-3);
  border-bottom: 1px solid var(--color-border);
  display: flex; align-items: center; justify-content: space-between;
  color: var(--grey-300);
  opacity: 0;
  transform: translateY(16px);
  transition: color var(--dur-fast) var(--ease-out);
}
.mobile-menu.is-open .mobile-link {
  animation: mlink-in var(--dur-slow) var(--ease-out) forwards;
}
.mobile-link:hover, .mobile-link:active { color: var(--white); }
.mobile-link .idx { font-family: var(--font-mono); font-size: var(--fs-sm); color: var(--color-accent-bright); }

.mobile-social {
  display: flex;
  gap: var(--sp-4);
  margin-top: var(--sp-8);
}
.mobile-social a {
  width: 46px; height: 46px;
  border-radius: 50%;
  border: 1px solid var(--color-border-strong);
  display: flex; align-items: center; justify-content: center;
  color: var(--grey-300);
  transition: border-color var(--dur-fast), color var(--dur-fast), background var(--dur-fast);
}
.mobile-social a:hover { border-color: var(--color-accent-bright); color: var(--white); background: rgba(20,112,214,0.12); }

/* ---- Scroll-to-top button -------------------------------------------------- */
.to-top {
  position: fixed;
  right: var(--sp-5); bottom: var(--sp-5);
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 1px solid var(--color-border-strong);
  display: flex; align-items: center; justify-content: center;
  color: var(--white);
  z-index: 400;
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out), border-color var(--dur-fast), background var(--dur-fast);
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { border-color: var(--color-accent-bright); background: var(--ink-850); transform: translateY(-3px); }
.to-top svg { width: 18px; height: 18px; }

/* ---- Social icon row (shared) -------------------------------------------- */
.social-row { display: flex; align-items: center; gap: var(--sp-3); }
.social-icon {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border-strong);
  display: flex; align-items: center; justify-content: center;
  color: var(--grey-300);
  transition: border-color var(--dur-fast), color var(--dur-fast), transform var(--dur-fast), background var(--dur-fast);
}
.social-icon svg { width: 17px; height: 17px; }
.social-icon:hover { color: var(--white); border-color: var(--color-accent-bright); background: rgba(20,112,214,0.12); transform: translateY(-3px); }