/* =========================================
   TELUM TARGET — NAVBAR
========================================= */

nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--navbar-height);
  z-index: var(--z-navbar);
  background: var(--color-bg-navbar);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: var(--border-subtle);
  overflow: visible;
}

.nav-container {
  position: relative;
  width: 100%;
  height: 100%;
  max-width: var(--layout-max-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {

  height: 42px;

  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav-links a {

  position: relative;

  display: inline-flex;

  align-items: center;

  height: 100%;

  color:
    var(--color-text-secondary);

  font-size:
    var(--font-size-button);

  font-weight:
    var(--font-weight-medium);

  letter-spacing:
    0.02em;

  transition:
    color var(--duration-fast)
    var(--ease-smooth);
}

.nav-links a::after {

  content: "";

  position: absolute;

  left: 0;
  bottom: -8px;

  width: 0%;
  height: 2px;

  border-radius: 999px;

  background:
    var(--color-accent);

  transition:
    width var(--duration-medium)
    var(--ease-premium);
}

.nav-links a:hover {

  color:
    var(--color-text-primary);
}

.nav-links a:hover::after {

  width: 100%;
}

/* =========================================
   MOBILE MENU TOGGLE
========================================= */

.mobile-menu-toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  cursor: pointer;
  padding: 0;
  z-index: 200;
}

.mobile-menu-toggle span {
  position: absolute;
  left: 10px;
  width: 24px;
  height: 2px;
  border-radius: 999px;
  background:var(--color-text-primary);
  transition:
    all var(--transition-medium)
    var(--ease-premium);
}

.mobile-menu-toggle span:nth-child(1) {
  top: 14px;
}

.mobile-menu-toggle span:nth-child(2) {
  top: 21px;
}

.mobile-menu-toggle span:nth-child(3) {
  top: 28px;
}

/* =========================================
   NAV DIVIDER
========================================= */

.nav-divider {

  width: 1px;

  height: 40px;

  margin-inline: 12px;

  background:
    linear-gradient(
      to bottom,
      transparent,
      var(--color-border-subtle),
      transparent
    );
}

/* =========================================
   MOBILE
========================================= */

@media (max-width: 900px) {
  .mobile-menu-toggle {
    display: block;
  }

  .nav-links {
    box-sizing: border-box;
    position: absolute;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    width: 100vw;

    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 28px;

    padding: 32px;
    border-bottom: var(--border-subtle);
    z-index: calc(var(--z-navbar) - 1);
  }

  .nav-links::before {

    content: "";
    position: absolute;
    inset: 0;
    background: var(--color-bg-dropdown);
    backdrop-filter:blur(20px);
    -webkit-backdrop-filter:blur(20px);
    border-bottom:var(--border-subtle);
    z-index: -1;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-divider {
    width: 100%;
    height: 1px;
    margin: 8px 0;
    background: linear-gradient(to right, transparent, var(--color-border-subtle), transparent);
  }

  .language-switcher {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: 0;
  }

  .nav-controls {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
  }

  .theme-toggle {
    margin-left: auto;
  }
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 16px;
}

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

.language-switcher {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 20px;
}

.lang-btn {
  padding:8px 12px;
  border-radius:var(--radius-pill);
  border:var(--border-subtle);
  background:rgba(255,255,255,0.45);
  color: var(--color-text-secondary);
  font-size: 0.78rem;
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.08em;
  transition:
    all var(--duration-fast)
    var(--ease-smooth);
}

.lang-btn:hover {
  color: var(--color-text-primary);
  background: rgba(255,255,255,0.75);
  transform: translateY(-2px);
}

.lang-btn.active {
  background: var(--color-accent);
  color: var(--color-pure-white);
  border-color: transparent;
  box-shadow: var(--shadow-red-soft);
}

/* =========================================
   THEME TOGGLE
========================================= */

.theme-toggle {
  display: flex;
  align-items: center;
}

.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
}

/* =========================================
   TRACK
========================================= */
.theme-toggle-track {
  position: relative;
  width: 54px;
  height: 30px;
  border-radius: 999px;
  background:rgba(0,0,0,0.14);
  border:1px solid rgba(0,0,0,0.10);
  transition:
    background var(--duration-medium)
    var(--ease-smooth),

    border-color var(--duration-medium)
    var(--ease-smooth);
}

/* =========================================
   THUMB
========================================= */

.theme-toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background:white;
  box-shadow:0 2px 10px rgba(0,0,0,0.18);
  transition:
    transform var(--duration-medium)
    var(--ease-premium),
    background var(--duration-medium)
    var(--ease-smooth);
}

/* =========================================
   ICONS
========================================= */
.theme-icon {
  position: absolute;
  top: 50%;
  transform:translateY(-50%);
  font-size: 12px;
  line-height: 1;
  pointer-events: none;
  transition:
    color var(--duration-medium)
    var(--ease-smooth),

    opacity var(--duration-medium)
    var(--ease-smooth);
}

.theme-icon.sun {
  left: 8px;
  color:rgba(0,0,0,0.55);
}

.theme-icon.moon {
  right: 8px;
  color:rgba(0,0,0,0.55);
}

/* =========================================
   DARK MODE
========================================= */

html[data-theme="dark"]
.theme-toggle-track {

  background:rgba(255,255,255,0.14);
  border-color:rgba(255,255,255,0.10);
}

html[data-theme="dark"]
.theme-toggle-thumb {

  transform:translateX(24px);
  background:var(--color-accent);
}

html[data-theme="dark"]
.theme-icon.sun {
  color:rgba(255,255,255,0.45);
}

html[data-theme="dark"]
.theme-icon.moon {
  color:rgba(255,255,255,0.85);
}


/* =========================================
   ACTIVE STATE
========================================= */
.mobile-menu-toggle.active
span:nth-child(1) {

  transform:
    translateY(7px)
    rotate(45deg);
}

.mobile-menu-toggle.active
span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active
span:nth-child(3) {

  transform:
    translateY(-7px)
    rotate(-45deg);
}