/* ===========================
   HEADER + NAV + LANGUAGE SWITCH
   =========================== */

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, .75);
  border-bottom: 1px solid var(--line);
}

/* Header spacing */
header,
.header {
  padding-left: 0;
  padding-right: 0;
}

header .container,
.header .container {
  width: 100%;
}

.header__inner {
  height: 72px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo {
  display: inline-flex;
  align-items: flex-end;
  gap: 6px;
  font-weight: 650;
  letter-spacing: .3px;
}

.logo__img {
  display: block;
  width: auto;
}

.logo__img--mark {
  height: 28px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-left: auto;
  margin-right: 18px;
}

.nav__link {
  font-size: 14px;
  color: var(--muted);
  padding: 8px 0;
  border-bottom: 1px solid transparent;
  transition: color var(--t) ease, border-color var(--t) ease;
}

.nav__link:hover {
  color: var(--fg);
}

.nav__link.is-active {
  font-weight: 600;
  color: var(--fg);
  border-bottom-color: var(--fg);
}

.nav__toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .6);
  border-radius: 10px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0;
  transition: background var(--t) ease;
}

.nav__toggle:hover {
  background: rgba(0, 0, 0, .03);
}

.nav__toggle:active {
  transform: scale(.97);
}

.nav__toggle-bar {
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--fg);
  margin: 0;
  opacity: .85;
  border-radius: 1px;
  transition: transform 280ms cubic-bezier(.4, 0, .2, 1),
              opacity 180ms ease;
  transform-origin: center center;
}

/* --- Language Switch (TR/EN) --- */

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.lang-switch__btn {
  height: 34px;
  width: 34px;
  padding: 0;
  border: 1px solid var(--line);
  background: #fff;
  cursor: pointer;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  transition: background var(--t) ease, color var(--t) ease, transform var(--t) ease, border-color var(--t) ease, box-shadow var(--t) ease;
  border-radius: 999px;
  display: grid;
  place-items: center;
}

.lang-switch__btn:hover {
  color: var(--fg);
  border-color: rgba(0, 0, 0, .2);
  transform: translateY(-1px);
}

.lang-switch__btn.is-active {
  color: #fff;
  background: var(--fg);
  border-color: var(--fg);
  box-shadow: 0 6px 14px rgba(0, 0, 0, .14);
}

.lang-switch__btn.is-active:hover {
  background: var(--fg);
}

.lang-switch__btn:focus-visible {
  outline: 2px solid rgba(0, 0, 0, .25);
  outline-offset: 2px;
}

/* --- Responsive --- */

@media (max-width: 1200px) {
  /* base.css takes care of padding */
}

@media (max-width: 900px) {

  .nav {
    gap: 16px;
    margin-right: 12px;
  }

  .nav__link {
    font-size: 13px;
  }

  .lang-switch {
    gap: 6px;
  }

  .lang-switch__btn {
    height: 30px;
    width: 30px;
    font-size: 9px;
    letter-spacing: .08em;
  }
}

@media (max-width: 760px) {

  /* --- Hamburger toggle --- */
  .nav__toggle {
    display: flex;
  }

  /* Open state → X shape */
  /* gap:5px + bar height 1.5px → center-to-center = 6.5px */
  .nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) {
    transform: translateY(6.5px) rotate(45deg);
  }
  .nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
  }
  .nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) {
    transform: translateY(-6.5px) rotate(-45deg);
  }

  /* --- Dropdown menu --- */
  .nav {
    position: absolute;
    right: var(--gutter-x, 16px);
    top: calc(72px + 6px);
    width: min(280px, calc(100% - var(--gutter-x, 16px) * 2));
    display: flex;
    flex-direction: column;
    gap: 0;
    background: rgba(255, 255, 255, .88);
    backdrop-filter: blur(28px) saturate(1.3);
    -webkit-backdrop-filter: blur(28px) saturate(1.3);
    border: 1px solid rgba(0, 0, 0, .08);
    border-radius: 14px;
    overflow: hidden;
    padding: 4px 0;
    box-shadow: 0 8px 32px rgba(0, 0, 0, .10),
                0 1px 4px rgba(0, 0, 0, .04);
    margin-left: 0;
    margin-right: 0;

    /* Animate in/out */
    opacity: 0;
    transform: translateY(-6px);
    transform-origin: top right;
    pointer-events: none;
    transition: opacity 200ms cubic-bezier(.4, 0, .2, 1),
                transform 200ms cubic-bezier(.4, 0, .2, 1);
  }

  .nav.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  /* --- Nav links inside dropdown --- */
  .nav__link {
    width: 100%;
    padding: 12px 18px;
    font-size: 14px;
    font-weight: 400;
    letter-spacing: .15px;
    color: var(--fg);
    border-bottom: 1px solid rgba(0, 0, 0, .06);
    border-radius: 0;
    transition: background 150ms ease, color 150ms ease;
  }

  .nav__link:last-child {
    border-bottom: none;
  }

  .nav__link:hover,
  .nav__link:active {
    background: rgba(0, 0, 0, .04);
  }

  .nav__link.is-active {
    font-weight: 600;
    color: var(--fg);
    border-bottom-color: rgba(0, 0, 0, .06);
  }

  .logo {
    order: -2;
  }

  .lang-switch {
    order: -1;
    margin-left: auto;
    margin-right: 8px;
    gap: 6px;
  }

  .lang-switch__btn {
    height: 28px;
    width: 28px;
    font-size: 9px;
    letter-spacing: .08em;
  }
}