/* ════════════════════════════════════════════════════════════════════
   NAV — Universal Navigation (Single Source of Truth)
   Anthropic-style split-button with scroll color shift
   Used by all EJS layouts via views/partials/nav.ejs
════════════════════════════════════════════════════════════════════ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 64px;
  display: flex;
  align-items: center;
  padding: 0 40px;
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
  background: transparent;
}

/* ── Solid variant (non-hero pages — always white) ──────────────── */
.nav.nav-solid {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--border), 0 4px 20px rgba(74,48,112,0.07);
}

/* ── Transparent variant (hero pages — scrolls to white) ────────── */
.nav.nav-transparent {
  background: transparent;
}

.nav.nav-transparent.scrolled {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--border), 0 4px 20px rgba(74,48,112,0.07);
}

/* ── Inner layout ───────────────────────────────────────────────── */
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}

/* ── Logo ───────────────────────────────────────────────────────── */
.nav-logo {
  font-size: 18px;
  color: var(--text-on-dark);
  letter-spacing: -0.02em;
  transition: color var(--transition);
  white-space: nowrap;
}

.logo-nathan {
  font-family: 'Playfair Display', serif;
  font-weight: 500;
  color: #0A0A0A; /* Black — for solid/scrolled nav (light bg) */
}

.logo-twin {
  font-family: 'Raleway', sans-serif;
  font-weight: 800;
  color: var(--purple); /* Dark purple — for solid/scrolled nav (light bg) */
}

/* Dark hero pages — transparent (unscrolled) nav: Nathan white, Twin dark purple */
.nav.nav-transparent:not(.scrolled) .logo-nathan {
  color: #FFFFFF;
}
.nav.nav-transparent:not(.scrolled) .logo-twin {
  color: var(--purple);
}

.nav.nav-solid .nav-logo { color: var(--purple); }
.nav.nav-transparent.scrolled .nav-logo { color: var(--purple); }

/* ── Nav links ──────────────────────────────────────────────────── */
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  font-family: 'Raleway', sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: rgba(245,242,237,0.85);
  transition: color var(--transition);
  padding: 8px 10px;
  white-space: nowrap;
}

.nav.nav-solid .nav-link { color: var(--text-secondary); }
.nav.nav-transparent.scrolled .nav-link { color: var(--text-secondary); }

.nav-link:hover { color: var(--text-on-dark); }
.nav.nav-solid .nav-link:hover { color: var(--purple); }
.nav.nav-transparent.scrolled .nav-link:hover { color: var(--purple); }

/* Legacy support for .nav-items used by older partials */
.nav-items {
  display: flex;
  gap: 4px;
  margin-left: 40px;
  align-items: center;
}

.nav-items a {
  font-family: 'Raleway', sans-serif;
  font-weight: 600;
  font-size: 14px;
  color: rgba(245,242,237,0.85);
  transition: color var(--transition);
  white-space: nowrap;
  cursor: pointer;
  padding: 8px 10px;
}

.nav.nav-solid .nav-items a,
.nav.nav-transparent.scrolled .nav-items a {
  color: var(--text-secondary);
}

.nav-items a:hover { color: var(--text-on-dark); }
.nav.nav-solid .nav-items a:hover,
.nav.nav-transparent.scrolled .nav-items a:hover {
  color: var(--purple);
}

/* ── CTA split-button group ─────────────────────────────────────── */
.nav-cta-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
  margin-left: 8px;
}

.nav-cta-group {
  display: inline-flex;
  align-items: center;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 2px solid rgba(245,242,237,0.4);
  transition: border-color var(--transition), background var(--transition);
}

.nav.nav-solid .nav-cta-group,
.nav.nav-transparent.scrolled .nav-cta-group {
  border-color: var(--purple);
  background: var(--purple);
}

.nav-cta-try {
  font-family: 'Raleway', sans-serif;
  font-size: 14px;
  font-weight: 700;
  color: rgba(245,242,237,0.95);
  padding: 8px 16px;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}

.nav.nav-solid .nav-cta-try,
.nav.nav-transparent.scrolled .nav-cta-try { color: #fff; }

.nav-cta-try:hover { background: rgba(245,242,237,0.1); }
.nav.nav-solid .nav-cta-try:hover,
.nav.nav-transparent.scrolled .nav-cta-try:hover { background: var(--purple-mid); }

.nav-cta-chevron {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 36px;
  border: none;
  border-left: 1px solid rgba(245,242,237,0.25);
  background: transparent;
  color: rgba(245,242,237,0.85);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  padding: 0;
  flex-shrink: 0;
}

.nav.nav-solid .nav-cta-chevron,
.nav.nav-transparent.scrolled .nav-cta-chevron {
  border-left-color: rgba(255,255,255,0.2);
  color: #fff;
}

.nav-cta-chevron:hover { background: rgba(245,242,237,0.1); }
.nav.nav-solid .nav-cta-chevron:hover,
.nav.nav-transparent.scrolled .nav-cta-chevron:hover { background: var(--purple-mid); }

.nav-cta-chevron svg {
  transition: transform var(--transition);
  pointer-events: none;
}

.nav-cta-wrap.open .nav-cta-chevron svg { transform: rotate(180deg); }

/* ── Dropdown ───────────────────────────────────────────────────── */
.nav-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 240px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 32px rgba(74,48,112,0.14), 0 2px 8px rgba(0,0,0,0.06);
  overflow: hidden;
  z-index: 200;
  animation: nav-dropdown-in 0.18s ease;
}

@keyframes nav-dropdown-in {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.nav-cta-wrap.open .nav-dropdown { display: block; }

.nav-dropdown-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 18px;
  transition: background var(--transition);
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

.nav-dropdown-item:last-child { border-bottom: none; }
.nav-dropdown-item:hover { background: var(--purple-faint); }

.nav-dropdown-label {
  font-family: 'Raleway', sans-serif;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-dropdown-desc {
  font-size: 12px;
  color: var(--text-muted);
}

/* ── Authenticated nav state ────────────────────────────────────── */
.nav-auth-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px 6px 8px;
  border-radius: var(--radius-md);
  border: 2px solid rgba(245,242,237,0.4);
  background: transparent;
  cursor: pointer;
  font-family: 'Raleway', sans-serif;
  font-size: 14px;
  font-weight: 700;
  color: rgba(245,242,237,0.95);
  transition: border-color var(--transition), background var(--transition), color var(--transition);
}

.nav.nav-solid .nav-auth-btn,
.nav.nav-transparent.scrolled .nav-auth-btn {
  border-color: var(--purple);
  background: var(--purple);
  color: #fff;
}

.nav-auth-btn:hover { background: rgba(245,242,237,0.1); }
.nav.nav-solid .nav-auth-btn:hover,
.nav.nav-transparent.scrolled .nav-auth-btn:hover { background: var(--purple-mid); }

.nav-auth-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  object-fit: cover;
  border: 1.5px solid rgba(255,255,255,0.6);
  flex-shrink: 0;
}

.nav-auth-initials {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(255,255,255,0.25);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 800;
  flex-shrink: 0;
}

.nav-auth-name {
  max-width: 90px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-dropdown-signout {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  cursor: pointer;
  font: inherit;
  padding: 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  transition: background var(--transition);
  color: inherit;
  border-top: 1px solid var(--border);
}

.nav-dropdown-signout:hover { background: #fef2f2; }
.nav-dropdown-signout .nav-dropdown-label { color: #dc2626; }

/* ── Tier hierarchy in dropdown ─────────────────────────────────── */
.nav-dropdown-item--circle {
  background: linear-gradient(135deg, rgba(212,175,55,0.06) 0%, rgba(212,175,55,0.02) 100%);
  border-left: 3px solid #D4AF37;
}
.nav-dropdown-item--circle:hover {
  background: linear-gradient(135deg, rgba(212,175,55,0.12) 0%, rgba(212,175,55,0.04) 100%) !important;
}
.nav-dropdown-tier-badge {
  display: inline-block;
  font-family: 'Raleway', sans-serif;
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #D4AF37;
  background: rgba(212,175,55,0.12);
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 2px;
  width: fit-content;
}
.nav-dropdown-item--disabled {
  opacity: 0.5;
  cursor: default;
  pointer-events: none;
}
.nav-dropdown-item--disabled .nav-dropdown-desc {
  font-style: italic;
}

/* ── Mobile tier tags ───────────────────────────────────────────── */
.mobile-tier-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--purple-faint, rgba(108,71,255,0.08));
  color: var(--purple, #6C47FF);
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 8px;
  vertical-align: middle;
}
.mobile-tier-tag--gold {
  background: rgba(212,175,55,0.15);
  color: #B8960F;
}
.mobile-menu-circle {
  color: var(--text-primary);
}

/* ── Mobile hamburger ───────────────────────────────────────────── */
.nav-hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--text-on-dark);
  margin-left: 8px;
  padding: 4px;
  line-height: 1;
}

.nav.nav-solid .nav-hamburger,
.nav.nav-transparent.scrolled .nav-hamburger {
  color: var(--text-primary);
}

.nav-mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  max-height: calc(100vh - 64px);
  overflow-y: auto;
  padding: 20px 24px 28px;
  flex-direction: column;
  gap: 4px;
  z-index: 99;
}

.nav-mobile-menu.active { display: flex; }

.nav-mobile-menu a {
  font-family: 'Raleway', sans-serif;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
}

.nav-mobile-menu a:last-child { border-bottom: none; }
.nav-mobile-menu a:hover { color: var(--purple); }

.nav-mobile-cta {
  margin-top: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: 'Raleway', sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: #fff !important;
  background: var(--purple);
  border-radius: var(--radius-md);
  padding: 14px 24px;
  border-bottom: none !important;
  transition: background var(--transition) !important;
  text-align: center;
}

.nav-mobile-cta:hover { background: var(--purple-mid) !important; color: #fff !important; }

@media (max-width: 768px) {
  .nav-hamburger { display: block; }
  .nav-links { display: none; }
  .nav-items { display: none; }
  .nav-cta-wrap { display: none; }
}