/* ==========================================================================
   SK SERVICES — NAVIGATION STYLES
   ========================================================================== */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 22px 0;
  transition: padding var(--dur-med) var(--ease-out), background var(--dur-med) var(--ease-out), border-color var(--dur-med) var(--ease-out), box-shadow var(--dur-med) var(--ease-out);
  border-bottom: 1px solid transparent;
}

.site-nav.is-scrolled {
  padding: 14px 0;
  background: rgba(14, 18, 20, 0.65);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 10px 40px -20px rgba(0,0,0,0.6);
}

.nav-inner {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 var(--section-pad-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.nav-logo img { width: 34px; height: 34px; border-radius: 50%; }
.nav-logo-text {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--text);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: clamp(20px, 3vw, 40px);
}

.nav-links { display: flex; align-items: center; gap: clamp(16px, 2.4vw, 32px); }

.nav-link {
  position: relative;
  font-size: 0.92rem;
  color: var(--text-soft);
  padding: 6px 2px;
  transition: color var(--dur-fast) var(--ease-out);
}
.nav-link span { position: relative; }
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--accent-light);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--dur-med) var(--ease-out);
}
.nav-link:hover, .nav-link:focus-visible { color: var(--text); }
.nav-link:hover::after, .nav-link:focus-visible::after { transform: scaleX(1); transform-origin: left; }
.nav-link.is-active { color: var(--text); }
.nav-link.is-active::after { transform: scaleX(1); }

.nav-cta { padding: 12px 24px; font-size: 0.88rem; flex-shrink: 0; }

/* ---------- HAMBURGER TOGGLE ---------- */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  flex-shrink: 0;
  z-index: 1001;
  transition: border-color var(--dur-fast) var(--ease-out);
}
.nav-toggle:hover { border-color: var(--accent); }
.nav-toggle-bar {
  width: 16px;
  height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--dur-med) var(--ease-out), opacity var(--dur-fast) var(--ease-out), width var(--dur-fast) var(--ease-out);
}

.nav-toggle.is-open .nav-toggle-bar:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.is-open .nav-toggle-bar:nth-child(2) { opacity: 0; width: 0; }
.nav-toggle.is-open .nav-toggle-bar:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.nav-scrim {
  position: fixed;
  inset: 0;
  background: rgba(6, 8, 9, 0.55);
  backdrop-filter: blur(2px);
  z-index: 998;
  opacity: 0;
  transition: opacity var(--dur-med) var(--ease-out);
}
.nav-scrim.is-visible { opacity: 1; }

/* ==========================================================================
   RESPONSIVE — TABLET / MOBILE
   ========================================================================== */
@media (max-width: 900px) {
  .nav-toggle { display: flex; }

  .nav-menu {
    position: fixed;
    top: 0;
    right: 0;
    height: 100svh;
    width: min(360px, 84vw);
    background: var(--surface);
    border-left: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 40px;
    padding: 40px clamp(28px, 6vw, 48px);
    transform: translateX(100%);
    transition: transform var(--dur-med) var(--ease-in-out);
    z-index: 999;
  }
  .nav-menu.is-open { transform: translateX(0); }

  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 22px;
    width: 100%;
  }
  .nav-link { font-size: 1.3rem; }

  .nav-cta { width: 100%; text-align: center; }
}

@media (max-width: 400px) {
  .nav-logo-text { display: none; }
}