/* ============================================================
   ACCUFILER — Navigation Component
   Design System v3.0
   ============================================================ */

.nav { position: sticky; top: 0; left: 0; right: 0; z-index: var(--z-nav); background: rgba(8,14,11,0.96); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); transition: background var(--t-base); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: var(--sp4); }

.nav-logo { flex-shrink: 0; font-family: var(--sans); font-size: 20px; font-weight: 700; letter-spacing: -0.02em; line-height: 1; color: var(--ink); text-decoration: none; display: flex; flex-direction: column; gap: 3px; }
.nav-logo .accu  { font-weight: 700; color: var(--ink); }
.nav-logo .filer { font-weight: 300; color: var(--gold); }
.nav-logo-rule { width: 100%; height: 1px; background: linear-gradient(90deg, var(--gold), transparent); }
.nav-logo-tag  { font-size: 7px; font-weight: 500; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted-dark); }

.nav-links { display: none; align-items: center; gap: var(--sp2); flex: 1; justify-content: center; }
@media (min-width: 1024px) { .nav-links { display: flex; } }

.nav-link { display: flex; align-items: center; gap: 5px; padding: 8px 14px; font-size: 13.5px; font-weight: 400; color: var(--muted-dark); border-radius: var(--r-sm); cursor: pointer; transition: color var(--t-fast); border: none; background: none; white-space: nowrap; position: relative; }
.nav-link:hover, .nav-link.active { color: var(--ink); }
.nav-link svg { width: 12px; height: 12px; transition: transform var(--t-fast); flex-shrink: 0; }
.nav-link:hover svg, .nav-link.open svg { transform: rotate(180deg); }

.nav-right { display: flex; align-items: center; gap: var(--sp3); flex-shrink: 0; }

.nav-lang { display: none; align-items: center; gap: 6px; font-size: 11px; font-weight: 500; color: var(--muted-dark); cursor: pointer; padding: 6px 10px; border: 1px solid var(--border); border-radius: var(--r-sm); transition: all var(--t-fast); background: none; }
.nav-lang:hover { border-color: var(--gold-dim); color: var(--gold); }
.nav-lang-divider { color: var(--dim-dark); font-size: 10px; }
.nav-lang span.active { color: var(--gold); }
@media (min-width: 768px) { .nav-lang { display: flex; } }

.nav-portal { display: none; font-size: 12.5px; color: var(--muted-dark); transition: color var(--t-fast); white-space: nowrap; }
.nav-portal:hover { color: var(--gold); }
@media (min-width: 1024px) { .nav-portal { display: block; } }

.nav-cta { display: inline-flex; align-items: center; gap: 6px; background: var(--gold); color: var(--void); font-size: 13px; font-weight: 500; padding: 9px 20px; border-radius: var(--r-md); border: none; cursor: pointer; transition: all var(--t-base); white-space: nowrap; text-decoration: none; }
.nav-cta:hover { background: var(--gold-light); transform: translateY(-1px); }

.nav-hamburger { display: flex; flex-direction: column; justify-content: center; gap: 5px; width: 36px; height: 36px; padding: 6px; border: none; background: none; cursor: pointer; border-radius: var(--r-sm); transition: background var(--t-fast); }
.nav-hamburger:hover { background: var(--forest); }
.nav-hamburger span { display: block; height: 1.5px; background: var(--muted-dark); border-radius: 1px; transition: all var(--t-base); }
.nav-hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }
@media (min-width: 1024px) { .nav-hamburger { display: none; } }

.nav-dropdown { position: absolute; top: calc(100% + 1px); left: 0; right: 0; background: var(--void); border-bottom: 1px solid var(--border); z-index: var(--z-dropdown); display: none; animation: slideDown var(--t-base) ease; }
.nav-dropdown.open { display: block; }
.nav-dropdown-inner { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 0; padding: var(--sp5) var(--sp6); }
.nav-dropdown-col { padding: 0 var(--sp5) 0 0; border-right: 1px solid var(--border); }
.nav-dropdown-col:last-child { border-right: none; padding-left: var(--sp5); padding-right: 0; }
.nav-dropdown-col:nth-child(2) { padding-left: var(--sp5); }
.nav-col-title { display: flex; align-items: center; gap: var(--sp2); font-size: 10px; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted-dark); margin-bottom: var(--sp3); padding-bottom: var(--sp2); border-bottom: 1px solid var(--border); }
.nav-col-title .flag { font-size: 14px; }
.nav-service-link { display: block; font-size: 13.5px; color: var(--body-dark); padding: 8px 0; border-bottom: 1px solid rgba(42,77,56,0.4); transition: color var(--t-fast); cursor: pointer; }
.nav-service-link:last-child { border-bottom: none; }
.nav-service-link:hover { color: var(--gold); }
.nav-popular-link { display: flex; align-items: center; gap: var(--sp2); font-size: 13.5px; color: var(--body-dark); padding: 8px 0; border-bottom: 1px solid rgba(42,77,56,0.4); transition: color var(--t-fast); cursor: pointer; }
.nav-popular-link:last-child { border-bottom: none; }
.nav-popular-link:hover { color: var(--gold); }
.nav-popular-flag { font-size: 12px; flex-shrink: 0; }

.nav-mobile { display: none; position: fixed; top: 64px; left: 0; right: 0; bottom: 0; background: var(--void); z-index: var(--z-modal); overflow-y: auto; padding: var(--sp4); animation: fadeIn 0.25s ease; }
.nav-mobile.open { display: block; }
.nav-mobile-section { border-bottom: 1px solid var(--border); padding: var(--sp3) 0; }
.nav-mobile-section:last-child { border-bottom: none; }
.nav-mobile-label { font-size: 10px; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted-dark); margin-bottom: var(--sp2); display: flex; align-items: center; gap: var(--sp2); }
.nav-mobile-link { display: block; font-size: 16px; color: var(--body-dark); padding: 12px 0; border-bottom: 1px solid rgba(42,77,56,0.3); transition: color var(--t-fast); }
.nav-mobile-link:last-child { border-bottom: none; }
.nav-mobile-link:hover { color: var(--gold); }
.nav-mobile-cta { width: 100%; margin-top: var(--sp4); text-align: center; justify-content: center; }