/* =========================================================
   Smith Visuals — Navigation Bar
   Figma: node 78:103. Bewusster Bruch mit der dunklen Seite:
   die Nav ist hell (Weiß/Schwarz), um sich vom Hero abzusetzen.
   Mobile-first ab 375px, ein Breakpoint fürs Umschalten auf Desktop-Layout.
   ========================================================= */

.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: background-color var(--dur-base) var(--ease-soft),
              box-shadow var(--dur-base) var(--ease-soft);
}

/* Beim Scrollen etwas satter + Schatten für Tiefe (dezent, kein Layout-Shift) */
.nav.is-scrolled {
  background: rgba(255, 255, 255, 0.99);
  box-shadow: var(--shadow-card);
}

.nav__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 4.5rem;
  padding-block: var(--space-2);
}

/* ---------- Logo ---------- */
.nav__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--c-text-dark);
  text-decoration: none;
  font-size: 1.2rem; /* sets the em size for the mask icon */
}

/* ---------- Desktop-Links (ab Breakpoint sichtbar) ---------- */
.nav__links {
  display: none;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.nav__link {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: var(--fs-nav);
  letter-spacing: 0.015em;
  color: var(--c-text-dark);
  transition: color var(--dur-fast) var(--ease-soft);
  position: relative;
}

.nav__link::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--c-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-fast) var(--ease-soft);
}

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

.nav__link.is-active {
  font-weight: 700;
  color: var(--c-accent);
}

.nav__link.is-active::after {
  transform: scaleX(1);
}

.nav__social {
  display: inline-flex;
  color: var(--c-text-dark);
  transition: color var(--dur-fast) var(--ease-soft), transform var(--dur-fast) var(--ease-soft);
}

.nav__social svg { width: 1.5rem; height: 1.5rem; }

.nav__social:hover {
  color: var(--c-accent);
  transform: translateY(-1px);
}

/* ---------- Hamburger-Button (mobil) ---------- */
.nav__toggle {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  width: 2.75rem;
  height: 2.75rem;
  margin-inline: calc(var(--space-2) * -1);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav__toggle-bar {
  display: block;
  width: 1.5rem;
  height: 2px;
  background: var(--c-text-dark);
  border-radius: var(--radius-full);
  transition: transform var(--dur-base) var(--ease-soft),
              opacity var(--dur-base) var(--ease-soft);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) {
  transform: translateY(0.5rem) rotate(45deg);
}
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) {
  transform: translateY(-0.5rem) rotate(-45deg);
}

/* ---------- Mobile-Menü (Scrim + Drawer) ---------- */
.nav__mobile {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
}

/* [inert] blendet das Menü sowohl visuell als auch für Tastatur/AT aus */
.nav__mobile[inert] {
  display: none;
}

.nav__scrim {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
  background: rgba(6, 7, 9, 0.6);
  cursor: pointer;
}

.nav__drawer {
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  width: min(85vw, 22rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-6);
  padding: var(--space-7) var(--space-5);
  background: var(--c-bg-elevated);
  box-shadow: -8px 0 40px rgba(0, 0, 0, 0.45);
  transform: translateX(100%);
  transition: transform var(--dur-base) var(--ease-soft);
}

.nav__mobile[data-state="open"] .nav__drawer {
  transform: translateX(0);
}

.nav__drawer-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.nav__drawer-link {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: var(--fs-subheading);
  color: var(--c-text);
}

.nav__drawer-link:hover,
.nav__drawer-link.is-active { color: var(--c-accent-on-dark); }

.nav__drawer-social {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--fs-label);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--c-text-dim);
}

.nav__drawer-social svg { width: 1.25rem; height: 1.25rem; }
.nav__drawer-social:hover { color: var(--c-accent-on-dark); }

@media (prefers-reduced-motion: reduce) {
  .nav__drawer { transition-duration: 0.001ms; }
}

/* ---------- Breakpoint: Desktop-Nav ---------- */
@media (min-width: 62rem) {
  .nav__links {
    display: flex;
    align-items: center;
    gap: var(--space-6);
  }

  .nav__toggle { display: none; }
  .nav__mobile { display: none !important; }
}