/* ── SHARED NAV — used by all public pages ─────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: grid; grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 40px;
  height: 60px;
  background: rgba(10,10,10,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-family: 'Space Mono', monospace;
  font-size: 25px; font-weight: 700;
  color: #ffffff; text-decoration: none;
  letter-spacing: -0.3px;
}
.nav-logo img { width: 48px; height: 48px; object-fit: contain; }

.nav-center {
  display: flex; justify-content: center;
  align-items: center; gap: 24px;
}

.nav-end {
  display: flex; justify-content: flex-end;
  align-items: center; gap: 12px;
}

.nav-link {
  font-size: 13px; font-weight: 500;
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  transition: color 0.15s;
}
.nav-link:hover { color: #fff; }

.nav-signin {
  font-size: 13px; font-weight: 600;
  letter-spacing: 0.08em;
  color: #6495ed;
  background: transparent;
  border: 1.5px solid #6495ed;
  padding: 8px 20px;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.18s, color 0.18s;
}
.nav-signin:hover { background: #6495ed; color: #000; }

/* ── Dropdown ─────────────────────────────────── */
.nav-dropdown { position: relative; }

.nav-dropdown-trigger {
  font-size: 13px; font-weight: 500;
  color: rgba(255,255,255,0.6);
  background: none; border: none;
  text-decoration: none;
  cursor: pointer;
  padding: 8px 0;
  display: flex; align-items: center; gap: 4px;
  transition: color 0.15s;
}
.nav-dropdown-trigger:hover { color: #fff; }
.nav-dropdown-trigger::after {
  content: '▾';
  font-size: 10px;
  margin-left: 2px;
}

.nav-dropdown-menu {
  display: none;
  position: absolute; top: 100%; left: 50%;
  transform: translateX(-50%);
  padding-top: 4px;
  z-index: 999;
}
.nav-dropdown-menu-inner {
  background: #1a1a1a;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  padding: 8px;
  min-width: 220px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}
.nav-dropdown:hover .nav-dropdown-menu { display: block; }
.nav-dropdown-menu:hover { display: block; }

.nav-dropdown-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px; font-weight: 500;
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  transition: background 0.12s;
}
.nav-dropdown-item:hover { background: rgba(100,149,237,0.1); }

/* ── Responsive ───────────────────────────────── */
@media (max-width: 900px) {
  .nav { padding: 0 20px; }
}

@media (max-width: 768px) {
  .nav-logo { font-size: 20px; }
  .nav-logo img { width: 40px; height: 40px; }
  .nav-logo span { display: none; }
  .nav-dropdown-menu { left: 0; transform: none; min-width: 200px; }
}

@media (max-width: 480px) {
  .nav-logo img { width: 32px; height: 32px; }
  .nav-signin { padding: 6px 10px; font-size: 11px; letter-spacing: 0.04em; }
  .nav-center { gap: 16px; }
}

@media (max-width: 400px) {
  .nav { padding: 0 10px; }
  .nav-signin { padding: 5px 8px; font-size: 10px; letter-spacing: 0; }
  .nav-center { gap: 12px; }
  .nav-link { font-size: 11px; }
  .nav-dropdown-trigger { font-size: 11px; }
}