/* =============================================================
   Navbar — 홍다경 Portfolio
   ============================================================= */

.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(251, 251, 244, 0.82);          /* paper, translucent */
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.nav.is-scrolled {
  border-bottom-color: var(--color-line);
  box-shadow: var(--shadow-sm);
}

.nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 68px;
  display: flex; align-items: center; gap: var(--space-8);
}

/* ---- Brand ---- */
.nav__brand {
  font-weight: var(--fw-extra);
  font-size: 1.25rem;
  letter-spacing: var(--ls-tight);
  white-space: nowrap;
  display: inline-flex; align-items: center; gap: 0.5ch;
}
.nav__brand .dot { color: var(--color-lime);
  -webkit-text-stroke: 0.5px var(--color-subtext); }

/* ---- Primary menu ---- */
.nav__menu {
  display: flex; align-items: center; gap: var(--space-2);
  list-style: none; margin: 0; padding: 0;
}
.nav__link {
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  font-size: 0.95rem;
  font-weight: var(--fw-medium);
  color: var(--color-ink);
  border-radius: var(--radius-pill);
  position: relative;
  transition: color .15s ease, background-color .15s ease;
}
.nav__link:hover { color: var(--color-ink); background: var(--color-paper-soft); }
.nav__link.is-active { font-weight: var(--fw-semibold); }
.nav__link.is-active::after {
  content: ""; position: absolute; left: 50%; bottom: 2px;
  width: 18px; height: 3px; border-radius: 2px;
  background: var(--color-lime); transform: translateX(-50%);
}

/* ---- Social / actions ---- */
.nav__actions { display: flex; align-items: center; gap: var(--space-2); margin-left: auto; }
.nav__divider { width: 1px; height: 22px; background: var(--color-line); margin: 0 var(--space-2); }

.nav__icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: var(--radius-pill);
  color: var(--color-ink);
  transition: background-color .15s ease, color .15s ease, transform .15s ease;
}
.nav__icon:hover { background: var(--color-ink); color: var(--color-lime); transform: translateY(-1px); }
.nav__icon svg { width: 20px; height: 20px; }

.nav__cta {
  display: inline-flex; align-items: center; gap: 0.4em;
  padding: var(--space-2) var(--space-4);
  font-size: 0.9rem; font-weight: var(--fw-semibold);
  background: var(--color-lime); color: var(--on-lime);
  border-radius: var(--radius-pill);
  transition: background-color .15s ease, transform .15s ease;
}
.nav__cta:hover { background: var(--color-lime-deep); transform: translateY(-1px); }
.nav__cta svg { width: 16px; height: 16px; }

/* ---- Mobile toggle ---- */
.nav__toggle {
  display: none; border: 0; background: transparent; cursor: pointer;
  width: 40px; height: 40px; padding: 8px; color: var(--color-ink);
}
.nav__toggle svg { width: 100%; height: 100%; }

/* ---- Responsive ---- */
@media (max-width: 860px) {
  .nav__toggle { display: inline-flex; margin-left: auto; }
  .nav__menu {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--color-paper);
    border-bottom: 1px solid var(--color-line);
    padding: var(--space-2) var(--space-4) var(--space-4);
    margin-left: 0;
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: transform .2s ease, opacity .2s ease;
  }
  .nav.is-open .nav__menu { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav__link { padding: var(--space-3) var(--space-3); border-radius: var(--radius-sm); }
  .nav__link.is-active::after { left: var(--space-3); transform: none; bottom: 6px; }
  .nav__actions { order: 2; }     /* keep social icons visible next to toggle */
  .nav__cta span { display: none; }    /* icon-only CTA on small screens */
}