/* ================================================================
   NAV — Sticky Navigation
   ================================================================ */

.sn-nav {
  position: sticky; top: 0; z-index: 200;
  height: var(--nav-h);
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  transition: background var(--dur-base), box-shadow var(--dur-base), border-color var(--dur-base);
}
.sn-nav.scrolled {
  background: rgba(255,255,255,0.97);
  box-shadow: 0 1px 24px rgba(0,0,0,0.06);
  border-color: transparent;
}

.sn-nav__inner {
  max-width: var(--max-w); margin-inline: auto;
  padding-inline: var(--pad-x); height: 100%;
  display: flex; align-items: center; gap: var(--space-6);
}

/* Logo */
.sn-nav__logo {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; flex-shrink: 0;
  transition: opacity var(--dur-base);
}
.sn-nav__logo:hover { opacity: 0.85; }
.sn-nav__logomark {
  width: 36px; height: 36px;
  background: var(--color-primary); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: transform var(--dur-mid) var(--ease-spring), box-shadow var(--dur-base);
}
.sn-nav__logo:hover .sn-nav__logomark {
  transform: scale(1.08);
  box-shadow: var(--shadow-green);
}
.sn-nav__logomark svg { width: 20px; height: 20px; }
.sn-nav__logotext {
  font-family: var(--font-display); font-weight: 800;
  font-size: 1.1rem; color: var(--color-primary); line-height: 1;
}
.sn-nav__logosub {
  font-size: 0.6rem; font-weight: 500;
  color: var(--color-text-2); letter-spacing: 0.04em;
}

/* Desktop menu */
.sn-nav__menu {
  display: flex; align-items: center; gap: var(--space-1); flex: 1;
}
.sn-nav__link {
  position: relative; padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm); font-weight: 500;
  color: var(--color-text-2); border-radius: var(--r-md);
  transition: color var(--dur-base), background var(--dur-base);
  display: flex; align-items: center; gap: 4px;
}
.sn-nav__link::after {
  content: '';
  position: absolute; bottom: 2px; left: 50%; right: 50%;
  height: 1.5px; background: var(--color-primary);
  transition: left var(--dur-base) var(--ease-smooth),
              right var(--dur-base) var(--ease-smooth);
  border-radius: 2px;
}
.sn-nav__link:hover { color: var(--color-text); }
.sn-nav__link:hover::after, .sn-nav__link[aria-current="page"]::after {
  left: var(--space-3); right: var(--space-3);
}
.sn-nav__link[aria-current="page"] { color: var(--color-primary); font-weight: 600; }
.sn-nav__link i { font-size: 14px; }

/* Actions */
.sn-nav__actions {
  display: flex; align-items: center; gap: var(--space-2); flex-shrink: 0;
  margin-left: auto;
}

/* Notification badge */
.sn-nav__notif {
  position: relative; display: flex; align-items: center;
  padding: var(--space-2); border-radius: var(--r-md);
  color: var(--color-text-2);
  transition: color var(--dur-base), background var(--dur-base);
}
.sn-nav__notif:hover { color: var(--color-text); background: var(--color-bg-2); }
.sn-nav__notif i { font-size: 20px; }
.sn-nav__badge {
  position: absolute; top: 4px; right: 4px;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--color-accent); border: 1.5px solid #fff;
}

/* Hamburger */
.sn-nav__hamburger {
  display: none; flex-direction: column; gap: 5px;
  width: 32px; padding: 4px; border-radius: var(--r-md);
}
.sn-nav__hamburger span {
  display: block; height: 1.5px; background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--dur-mid) var(--ease-spring),
              opacity var(--dur-base), width var(--dur-base);
}
.sn-nav__hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.sn-nav__hamburger.open span:nth-child(2) { opacity: 0; width: 0; }
.sn-nav__hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile nav */
.sn-nav__mobile {
  position: fixed; inset: var(--nav-h) 0 0 0;
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(20px);
  z-index: 190; padding: var(--space-6) var(--pad-x);
  display: flex; flex-direction: column; gap: var(--space-4);
  transform: translateX(100%);
  transition: transform var(--dur-mid) var(--ease-smooth);
  overflow-y: auto;
}
.sn-nav__mobile.open { transform: translateX(0); }
.sn-nav__mobile-link {
  display: flex; align-items: center; gap: var(--space-3);
  font-size: var(--text-lg); font-weight: 600; color: var(--color-text);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
  transition: color var(--dur-base), padding-left var(--dur-base) var(--ease-smooth);
}
.sn-nav__mobile-link:hover { color: var(--color-primary); padding-left: var(--space-2); }
.sn-nav__mobile-link i { font-size: 20px; color: var(--color-text-2); }

/* Responsive */
@media (max-width: 900px) {
  .sn-nav__menu  { display: none; }
  .sn-nav__hamburger { display: flex; }
  .sn-nav__actions .btn:not(.btn--icon):not(.btn--sm) { display: none; }
}
@media (max-width: 540px) {
  .sn-nav__logotext { display: none; }
}