/* Top nav bar, language switcher, mobile menu overlay */

/* ---------------------------------------------------- NAV */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 80;
  display: flex;
  align-items: center;
  transition: background-color 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}
.nav[data-theme="dark"] { color: var(--paper); }
.nav[data-theme="light"] { color: var(--ink); }
.nav[data-scrolled="true"][data-theme="dark"] {
  background: rgba(28, 20, 16, 0.86);
  border-bottom-color: var(--hairline-dark);
  backdrop-filter: blur(10px);
}
.nav[data-scrolled="true"][data-theme="light"] {
  background: rgba(244, 237, 226, 0.88);
  border-bottom-color: var(--hairline-light);
  backdrop-filter: blur(10px);
}
.nav__inner {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav__brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.nav__wordmark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(15px, 1.7vw, 19px);
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.nav__tagline {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  line-height: 1.2;
  color: var(--muted);
  opacity: 0.72;
  max-width: 220px;
}
.nav__links {
  display: flex;
  gap: clamp(16px, 2.4vw, 34px);
  margin-left: auto;
  margin-right: 8px;
}
.nav__link {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  opacity: 0.82;
  transition: opacity 0.2s ease, color 0.2s ease;
}
.nav__link:hover { opacity: 1; color: var(--terracotta); }
.nav__right { display: flex; align-items: center; gap: 14px; }

.lang {
  display: inline-flex;
  border: 1px solid var(--hairline);
}
.lang__btn {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  background: transparent;
  color: inherit;
  border: none;
  padding: 7px 11px;
  cursor: pointer;
  opacity: 0.66;
  transition: opacity 0.18s ease, background-color 0.18s ease, color 0.18s ease;
}
.lang__btn + .lang__btn { border-left: 1px solid var(--hairline); }
.lang__btn:hover { opacity: 1; }
.lang__btn.is-active {
  background: var(--terracotta);
  color: var(--paper);
  opacity: 1;
}

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--hairline);
  cursor: pointer;
}
.nav__burger-bar {
  width: 18px;
  height: 1.5px;
  background: currentColor;
  display: block;
}

/* mobile menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 75;
  background: var(--coffee-bg);
  color: var(--paper);
  transform: translateY(-100%);
  transition: transform 0.4s var(--ease-out);
  display: flex;
  align-items: center;
  justify-content: center;
  visibility: hidden;
}
.mobile-menu[data-open="true"] { transform: translateY(0); visibility: visible; }
.mobile-menu__panel {
  display: flex;
  flex-direction: column;
  gap: 26px;
  padding: 40px;
  text-align: left;
}
.mobile-menu__link {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 9vw, 3.4rem);
  letter-spacing: -0.02em;
}
.mobile-menu__link:hover { color: var(--terracotta); }
.mobile-menu__cta { align-self: flex-start; margin-top: 8px; }
.mobile-menu__langs { display: flex; gap: 8px; margin-top: 18px; }
.mobile-menu__langs .lang__btn { border: 1px solid var(--hairline-dark); }

@media (max-width: 720px) {
  .nav__links { display: none; }
  .nav .lang { display: none; }
  .nav__burger { display: flex; }
  .nav__right { gap: 0; }
}