/* =========================================================
   SAITECH NAVIGATION SYSTEM
   Floating Glass + Luxury Interaction
========================================================= */

.nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 9999;

  padding: 18px 0;

  transition: all 0.5s var(--ease-out);
}

/* GLASS CONTAINER */
.nav__container {
  width: min(1680px, 92%);
  margin: 0 auto;

  display: flex;
  align-items: center;
  justify-content: space-between;

  padding: 14px 20px;

  background: rgba(10,10,10,0.35);
  backdrop-filter: blur(24px);

  border: 1px solid var(--line);
  border-radius: 999px;

  transition: all 0.5s var(--ease-out);
}

/* =========================================================
   LOGO
========================================================= */

.nav__logo {
  font-size: 1rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text);

  transition: transform 0.4s var(--ease-out);
}

.nav__logo:hover {
  transform: scale(1.05);
}

/* =========================================================
   MENU
========================================================= */

.nav__menu {
  display: flex;
  gap: 28px;
}

.nav__menu a {
  font-size: 2rem;
  color: var(--text-dim);
  position: relative;
  transition: color 0.3s var(--ease-soft);
}

/* underline luxury animation */
.nav__menu a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0%;
  height: 1px;
  background: var(--accent);
  transition: width 0.4s var(--ease-out);
}

.nav__menu a:hover {
  color: var(--text);
}

.nav__menu a:hover::after {
  width: 100%;
}

/* =========================================================
   LANGUAGE SWITCHER
========================================================= */

.nav__lang {
  position: relative;
  display: flex;
  align-items: center;
}

.lang__active {
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--text);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 2rem;
  cursor: pointer;
  transition: 0.3s;
}

.lang__active:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* dropdown */
.lang__dropdown {
  position: absolute;
  top: 120%;
  right: 0;

  display: flex;
  flex-direction: column;

  background: rgba(10,10,10,0.85);
  backdrop-filter: blur(20px);

  border: 1px solid var(--line);
  border-radius: 12px;

  padding: 8px;

  opacity: 0;
  transform: translateY(-10px);
  pointer-events: none;

  transition: all 0.3s var(--ease-out);
}

.lang__dropdown button {
  background: none;
  border: none;
  color: var(--text-dim);
  padding: 8px 12px;
  text-align: left;
  cursor: pointer;
  font-size: 0.85rem;
  transition: 0.3s;
}

.lang__dropdown button:hover {
  color: var(--text);
}

/* show dropdown */
.nav__lang:hover .lang__dropdown {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* =========================================================
   SCROLL STATE (GSAP CONTROLLED)
========================================================= */

.nav.scrolled .nav__container {
  transform: scale(0.96);
  background: rgba(10,10,10,0.65);
  border-color: var(--line-strong);
}

/* =========================================================
   SAITECH ELITE NAV SYSTEM
   Advanced Interaction Layer
========================================================= */

/* ===================== SCROLL PROGRESS BAR ===================== */

.nav-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: var(--accent);
  z-index: 10000;
  transition: width 0.2s var(--ease-soft);
}

/* ===================== ACTIVE LINK STATE ===================== */

.nav__menu a.active {
  color: var(--text);
}

.nav__menu a.active::after {
  width: 100%;
}

/* ===================== MAGNETIC LINK EFFECT ===================== */

.nav__menu a {
  display: inline-block;
  will-change: transform;
}

/* ===================== MOBILE OVERLAY MENU ===================== */

.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10,10,10,0.95);
  backdrop-filter: blur(20px);

  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;

  opacity: 0;
  pointer-events: none;

  transition: 0.5s var(--ease-out);
  z-index: 9998;
}

.nav-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.nav-overlay a {
  font-size: 2rem;
  margin: 12px 0;
  color: var(--text-dim);
  transition: 0.3s;
}

.nav-overlay a:hover {
  color: var(--text);
}

/* hamburger */
.nav-burger {
  display: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}

.nav-burger span {
  width: 26px;
  height: 2px;
  background: var(--text);
  transition: 0.4s;
}

/* mobile */
@media (max-width: 900px) {
  .nav__menu {
    display: none;
  }

  .nav-burger {
    display: flex;
  }
}