/* ════════════════════════════════════════════════════════
   TREECLOUD NAVBAR — Redesigned
   Root element: #tc-navbar  |  class prefix: tc-
════════════════════════════════════════════════════════ */

#tc-navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--tm-navbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--tc-pad);
  transition: background 0.3s, box-shadow 0.3s;
}

/* ── Hero-dark mode (landing page top) ── */
#tc-navbar.hero-dark { color: var(--on-deep-strong); }
#tc-navbar.hero-dark .tc-nav-link { color: var(--on-deep-soft); }
#tc-navbar.hero-dark .tc-nav-link:hover {
  color: var(--on-deep-strong);
  background: rgba(237, 230, 208, 0.08);
}

/* ── Scrolled mode (white background) ── */
#tc-navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(14px) saturate(1.1);
  box-shadow: 0 1px 0 var(--stone-200);
}
#tc-navbar.scrolled .tc-nav-link { color: var(--ink-soft); }
#tc-navbar.scrolled .tc-nav-link:hover { color: var(--ink); background: var(--stone-100); }

/* ── Logo ── */
.tc-navbar-logo {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 400;
  letter-spacing: -0.02em;
  flex-shrink: 0;
  text-decoration: none;
}
.tc-logo-mark {
  width: 28px; height: 28px;
  display: inline-grid;
  place-items: center;
  border-radius: 50%;
  background: var(--forest-600);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  flex-shrink: 0;
}
#tc-navbar.hero-dark .tc-navbar-logo { color: var(--on-deep-strong); }
#tc-navbar.hero-dark .tc-logo-mark { background: rgba(237, 230, 208, 0.2); color: var(--on-deep-strong); }
#tc-navbar.scrolled .tc-navbar-logo { color: var(--ink); }
#tc-navbar.scrolled .tc-logo-mark { background: var(--forest-600); color: #fff; }

/* ── Desktop nav links ── */
.tc-navbar-links {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
  justify-content: center;
}
.tc-nav-item { position: relative; }
.tc-nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.85rem;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
  cursor: pointer;
  text-decoration: none;
}
.tc-chev { font-size: 0.6rem; opacity: 0.6; }

/* ── Dropdown ── */
.tc-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  min-width: 210px;
  background: #fff;
  border: 1px solid var(--stone-200);
  border-radius: var(--radius-md);
  box-shadow: 0 12px 40px -8px rgba(0, 0, 0, 0.14);
  padding: 0.4rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s, transform 0.15s;
  z-index: 200;
}
.tc-nav-item.open .tc-dropdown {
  opacity: 1;
  pointer-events: all;
  transform: translateX(-50%) translateY(0);
}
.tc-dropdown a {
  display: block;
  padding: 0.5rem 0.85rem;
  font-size: 0.85rem;
  color: var(--ink-soft);
  border-radius: var(--radius-sm);
  transition: background 0.12s, color 0.12s;
  text-decoration: none;
}
.tc-dropdown a:hover { background: var(--stone-100); color: var(--ink); }

/* ── Navbar right ── */
.tc-navbar-right { display: flex; align-items: center; gap: 0.75rem; }

/* ── Language switcher ── */
.tc-lang-switcher { display: flex; align-items: center; gap: 0.1rem; }
.tc-lang-btn {
  padding: 0.3rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
}
#tc-navbar.hero-dark .tc-lang-btn { color: var(--on-deep-soft); }
#tc-navbar.hero-dark .tc-lang-btn:hover,
#tc-navbar.hero-dark .tc-lang-btn.active {
  color: var(--on-deep-strong);
  background: rgba(237, 230, 208, 0.12);
}
#tc-navbar.scrolled .tc-lang-btn { color: var(--stone-400); }
#tc-navbar.scrolled .tc-lang-btn:hover { color: var(--ink); background: var(--stone-100); }
#tc-navbar.scrolled .tc-lang-btn.active { color: var(--forest-700); background: var(--forest-50); }

/* ── Login button (unauthenticated) ── */
.tc-btn-login {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 1.1rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all 0.15s;
  cursor: pointer;
  border: 1px solid transparent;
  text-decoration: none;
}
#tc-navbar.hero-dark .tc-btn-login {
  background: rgba(237, 230, 208, 0.12);
  color: var(--on-deep-strong);
  border-color: rgba(237, 230, 208, 0.25);
}
#tc-navbar.hero-dark .tc-btn-login:hover {
  background: rgba(237, 230, 208, 0.2);
  color: var(--on-deep-strong);
  text-decoration: none;
}
#tc-navbar.scrolled .tc-btn-login {
  background: var(--forest-600);
  color: #fff;
  border-color: var(--forest-600);
}
#tc-navbar.scrolled .tc-btn-login:hover {
  background: var(--forest-700);
  border-color: var(--forest-700);
  color: #fff;
  text-decoration: none;
}

/* ── Signed-in user links ── */
.tc-nav-user {
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all 0.15s;
}
.tc-btn-logout {
  font-size: 0.8rem;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all 0.15s;
}
#tc-navbar.hero-dark .tc-nav-user { color: var(--on-deep-soft); }
#tc-navbar.hero-dark .tc-nav-user:hover {
  color: var(--on-deep-strong);
  background: rgba(237, 230, 208, 0.08);
  text-decoration: none;
}
#tc-navbar.hero-dark .tc-btn-logout { color: rgba(237, 230, 208, 0.4); }
#tc-navbar.hero-dark .tc-btn-logout:hover {
  color: var(--on-deep-strong);
  background: rgba(237, 230, 208, 0.08);
  text-decoration: none;
}
#tc-navbar.scrolled .tc-nav-user { color: var(--ink-soft); }
#tc-navbar.scrolled .tc-nav-user:hover {
  color: var(--ink);
  background: var(--stone-100);
  text-decoration: none;
}
#tc-navbar.scrolled .tc-btn-logout { color: var(--stone-400); }
#tc-navbar.scrolled .tc-btn-logout:hover {
  color: #c0392b;
  background: #fff0f0;
  text-decoration: none;
}

/* ── Hamburger button ── */
#tc-hamburger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: transparent;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  flex-shrink: 0;
  padding: 0;
  transition: background 0.15s, border-color 0.15s;
}
#tc-navbar.hero-dark #tc-hamburger { color: var(--on-deep-strong); border-color: rgba(237, 230, 208, 0.2); }
#tc-navbar.hero-dark #tc-hamburger:hover { background: rgba(237, 230, 208, 0.08); }
#tc-navbar.scrolled #tc-hamburger { color: var(--ink-soft); border-color: var(--stone-200); }
#tc-navbar.scrolled #tc-hamburger:hover { background: var(--stone-100); border-color: var(--stone-300); }

/* ── Mobile backdrop overlay ── */
#tc-mobile-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(1px);
  z-index: 48;
  cursor: pointer;
}
#tc-mobile-overlay.visible { display: block; }

/* ── Mobile slide-down nav ── */
#tc-mobile-nav {
  display: none;
  position: fixed; top: 0; left: 0; right: 0;
  max-height: 100dvh;
  padding-top: var(--tm-navbar-height);
  z-index: 49;
  background: #fff;
  border-bottom: 1px solid var(--stone-200);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.14);
  overflow-y: auto;
  flex-direction: column;
  transform: translateY(-100%);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}
#tc-mobile-nav.open { transform: translateY(0); }

.tc-mobile-section {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--stone-400);
  padding: 0.875rem 1rem 0.375rem;
}
.tc-mobile-divider { height: 1px; background: #f0efed; margin: 0.375rem 1rem; }

.tc-mobile-link {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  padding: 0.75rem 1rem;
  margin: 0.125rem 0.5rem;
  border-radius: 10px;
  text-decoration: none;
  color: var(--stone-700);
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}
.tc-mobile-link:hover { background: var(--stone-100); color: var(--stone-900); text-decoration: none; }
.tc-mobile-link i { width: 20px; text-align: center; font-size: 0.9rem; color: var(--forest-600); flex-shrink: 0; }

.tc-mobile-sublink {
  display: block;
  padding: 0.4rem 1rem 0.4rem 3.5rem;
  margin: 0.1rem 0.5rem;
  border-radius: 6px;
  font-size: 0.8rem;
  color: var(--stone-500);
  text-decoration: none;
  transition: background 0.12s, color 0.12s;
}
.tc-mobile-sublink:hover { background: var(--stone-100); color: var(--stone-900); text-decoration: none; }

.tc-mobile-danger { color: #b91c1c !important; }
.tc-mobile-danger:hover { background: #fef2f2 !important; color: #991b1b !important; }
.tc-mobile-danger i { color: #dc2626 !important; }

#tc-mobile-footer {
  padding: 0.5rem 0.5rem calc(0.75rem + env(safe-area-inset-bottom, 0px));
}

/* ── Landing page: remove main container top padding so hero fills viewport ── */
#tm-main.tc-landing { padding-top: 0; }
#tm-main.tc-landing #tm-main-inner { padding: 0; }

/* ── Responsive breakpoints ── */
@media (max-width: 1000px) {
  .tc-navbar-links { display: none; }
  #tc-hamburger { display: flex; }
  #tc-mobile-nav { display: flex; }
}

@media (max-width: 767px) {
  #tm-main { margin-left: 0 !important; }
}