/* ============================================================
   Threads Empire — Notion-style chrome (nav + topbar)
   Source-of-truth for global navigation + per-page topbar layout.
   Loaded by every shipped page after notion-theme.css.
   Spec: openspec/changes/apply-notion-nav-topbar/
   ============================================================ */

/* -------------------- Navigation (.te-nav) -------------------- */

header.te-nav {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.25rem;
  padding: 0.75rem 1.25rem;
  background: var(--bg, #fff);
  border-bottom: 1px solid var(--rule, #e9e9e7);
  box-shadow: 0 1px 0 rgba(15, 15, 15, 0.04),
              0 6px 18px rgba(15, 15, 15, 0.06);
  position: sticky;
  top: 0;
  z-index: 210;
}

header.te-nav[data-scrolled="true"] {
  /* Border + shadow always visible; no scroll-state change. */
}

.te-nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.te-nav__brand a {
  color: var(--text, #37352f);
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.2;
}

.te-nav__primary {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  min-width: 0;
}

.te-nav__primary #navLinks {
  display: flex;
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.te-nav__primary #navLinks a {
  color: var(--text, #37352f);
  text-decoration: none;
  font-size: 0.92rem;
  padding: 0.35rem 0.5rem;
  border-radius: var(--radius-sm, 4px);
}

.te-nav__primary #navLinks a:hover {
  background: var(--bg-elev, #f7f6f3);
}

.te-nav__actions {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  justify-self: end;
}

/* Mobile (<=720px): primary nav becomes a slide-in overlay drawer */
@media (max-width: 720px) {
  header.te-nav {
    grid-template-columns: auto 1fr;
    gap: 0.5rem;
    padding: 0.6rem 0.9rem;
  }

  /* Slide-in panel from the left for pages without .te-shell */
  .te-nav__primary {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(300px, 84vw);
    background: var(--bg, #fff);
    border-right: 1px solid var(--rule, #e1e1e0);
    box-shadow: 4px 0 28px rgba(15, 15, 15, 0.18);
    z-index: 201;
    transform: translateX(-100%);
    transition: transform 0.22s ease;
    padding: 4.5rem 1.25rem 2.5rem;
    overflow-y: auto;
    order: unset;
    grid-column: unset;
    display: flex !important;
    flex-direction: column;
  }

  .te-nav__primary:has(#navLinks.open) {
    transform: translateX(0);
  }

  .te-nav__primary #navLinks {
    flex-direction: column;
    width: 100%;
    gap: 0;
    display: flex !important;
  }

  .te-nav__primary #navLinks:not(.open) {
    display: flex !important; /* always visible inside the panel */
  }

  .te-nav__primary #navLinks a {
    font-size: 0.98rem;
    padding: 0.72rem 0.75rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  /* Hide theme toggle from top actions on mobile (lives in the drawer instead) */
  .te-nav__actions > .theme-toggle {
    display: none;
  }
}

/* Desktop (>=1025px): hide burger */
@media (min-width: 1025px) {
  #burger {
    display: none !important;
  }
}

/* Desktop/tablet (>=721px): hide Home/Members nav links from top bar */
@media (min-width: 721px) {
  .te-nav__primary #navLinks {
    display: none;
  }
}

/* Burger button visual: three stacked bars — 44×44 touch target */
.hamburger {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--rule, #e1e1e0);
  border-radius: 8px;
  cursor: pointer;
  flex-shrink: 0;
}
.hamburger > span {
  display: block;
  height: 2px;
  width: 18px;
  background: var(--text, #37352f);
  border-radius: 2px;
  transition: transform .15s ease, opacity .15s ease;
}
.hamburger[aria-expanded="true"] > span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger[aria-expanded="true"] > span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] > span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Tablet (721-1024px): primary nav visible inline, burger hidden */
@media (min-width: 721px) and (max-width: 1024px) {
  #burger {
    display: none !important;
  }
}

/* Semi-transparent backdrop for mobile overlay menus (created by nav-chrome.js) */
.te-nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 15, 15, 0.55);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  z-index: 200;
  display: none;
  cursor: pointer;
}
.te-nav-backdrop.open {
  display: block;
}

/* Settings section at bottom of mobile nav drawer */
.te-nav-mobile-settings {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--rule, #e1e1e0);
  display: none;
  flex-direction: column;
  gap: 0.1rem;
  width: 100%;
  align-self: stretch;
}
/* Keep settings pinned to bottom in the shell sidebar */
.te-sidebar .te-nav-mobile-settings {
  margin-top: auto;
}
@media (max-width: 720px) {
  .te-nav-mobile-settings {
    display: flex;
  }
}
/* In the sidebar (te-shell pages): also hide on desktop */
@media (min-width: 721px) {
  .te-sidebar .te-nav-mobile-settings {
    display: none;
  }
}
.te-nav-mobile-settings__label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted, #787774);
  padding: 0 0.75rem;
  margin-bottom: 0.3rem;
}
.te-nav-mobile-settings__row {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  font-size: 0.88rem;
  color: var(--text, #37352f);
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  font-family: inherit;
  text-align: left;
  line-height: 1.3;
}
.te-nav-mobile-settings__row:hover {
  background: var(--bg-elev, #f7f6f3);
}
.te-nav-mobile-settings__row .te-icon {
  font-size: 1.15rem;
  flex-shrink: 0;
}
.te-nav-mobile-settings__row .ico-sun { display: none; }
.te-nav-mobile-settings__row .ico-moon { display: inline; }
html[data-theme="light"] .te-nav-mobile-settings__row .ico-sun { display: inline; }
html[data-theme="light"] .te-nav-mobile-settings__row .ico-moon { display: none; }

/* -------------------- Topbar (.te-topbar) -------------------- */

.te-topbar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 0.65rem 1.25rem;
  background: var(--bg, #fff);
  border-bottom: 1px solid transparent;
  position: sticky;
  top: 3.25rem; /* sits beneath nav; nav-chrome.js may refine via JS */
  z-index: 90;
  transition: border-color var(--dur, 160ms) var(--ease, ease),
              box-shadow var(--dur, 160ms) var(--ease, ease);
}

.te-topbar[data-stuck="true"] {
  border-bottom-color: var(--rule, #e9e9e7);
  box-shadow: 0 1px 0 rgba(15, 15, 15, 0.03);
}

.te-topbar__crumbs {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--muted, #787774);
  font-size: 0.85rem;
}

.te-topbar__crumbs li + li::before {
  content: "/";
  margin-right: 0.35rem;
  color: var(--muted, #787774);
  opacity: 0.6;
}

.te-topbar__crumbs a {
  color: var(--muted, #787774);
  text-decoration: none;
}

.te-topbar__crumbs a:hover {
  color: var(--text, #37352f);
  text-decoration: underline;
}

.te-topbar__crumbs li[aria-current="page"] {
  color: var(--text, #37352f);
  font-weight: 600;
}

.te-topbar__title {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0;
  color: var(--text, #37352f);
  line-height: 1.3;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.te-topbar__actions {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  justify-self: end;
}

/* Mobile (<=720px): hide breadcrumbs, keep title + actions */
@media (max-width: 720px) {
  .te-topbar {
    grid-template-columns: 1fr auto;
    padding: 0.55rem 0.9rem;
  }

  .te-topbar__crumbs {
    display: none;
  }
}

/* Tablet (721-1024px): collapse intermediate breadcrumbs */
@media (min-width: 721px) and (max-width: 1024px) {
  .te-topbar__crumbs > li:not(:first-child):not(:last-child) {
    display: none;
  }
}

/* Pages without a topbar should still preserve nav stickiness without
   leaving an empty gap; no rules needed — absence handles itself. */

/* ============================================================
   App-shell layout (top bar + left sidebar + main content).
   Used by app-style pages (members.html) that opt out of the
   horizontal .te-topbar breadcrumb pattern.
   ============================================================ */
.te-shell {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  align-items: start;
  width: 100%;
}

.te-sidebar {
  position: sticky;
  top: 3.5rem;
  align-self: start;
  height: calc(100vh - 3.5rem);
  overflow-y: auto;
  padding: 1.25rem 0.85rem;
  border-right: 1px solid var(--rule, #e6e3dc);
  background: var(--bg, #fff);
}

.te-sidebar nav { width: 100%; display: block; position: static; height: auto; }

.te-sidebar .nav-links {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.te-sidebar .nav-links > li > a,
.te-sidebar .nav-links > li > .te-sidebar__group-heading {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  color: var(--text, #37352f);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  background: none;
  border: 0;
  width: 100%;
  text-align: left;
  cursor: pointer;
  font-family: inherit;
}

.te-sidebar .nav-links > li > a:hover,
.te-sidebar .nav-links > li > .te-sidebar__group-heading:hover {
  background: var(--bg-elev, #f7f6f3);
}

.te-sidebar .nav-links > li[aria-current="page"] > a,
.te-sidebar .nav-links > li[aria-current="page"] > .te-sidebar__group-heading {
  background: var(--bg-elev, #f7f6f3);
  color: var(--accent, #ea580c);
}

.te-sidebar__children {
  list-style: none;
  margin: 0.2rem 0 0.5rem 0.4rem;
  padding: 0 0 0 0.6rem;
  border-left: 1px solid var(--rule, #e6e3dc);
  display: flex;
  flex-direction: column;
  gap: 0.05rem;
}

.te-sidebar__children li > button,
.te-sidebar__children li > a {
  background: none;
  border: 0;
  width: 100%;
  text-align: left;
  padding: 0.4rem 0.65rem;
  border-radius: 6px;
  color: var(--muted, #6f6d68);
  font: inherit;
  font-size: 0.88rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.te-sidebar__children li > button:hover,
.te-sidebar__children li > a:hover {
  background: var(--bg-elev, #f7f6f3);
  color: var(--text, #37352f);
}

.te-sidebar__children li > button.active,
.te-sidebar__children li > a.active {
  background: var(--bg-elev, #f7f6f3);
  color: var(--accent, #ea580c);
  font-weight: 600;
}

.te-main {
  padding: 1.5rem 2rem 4rem;
  min-width: 0;
}

/* Mobile (<=720px): sidebar becomes a slide-in drawer.
   Burger toggles #navLinks.open; the sidebar listens via :has(#navLinks.open). */
@media (max-width: 720px) {
  .te-shell {
    grid-template-columns: 1fr;
  }
  .te-sidebar {
    position: fixed;
    top: 3.5rem;
    left: 0;
    width: min(300px, 84vw);
    right: auto;
    bottom: 0;
    height: auto;
    z-index: 201;
    border-right: 1px solid var(--rule, #e6e3dc);
    border-top: 0;
    box-shadow: 4px 0 28px rgba(15, 15, 15, 0.18);
    transform: translateX(-100%);
    transition: transform 0.22s ease;
    max-height: none;
    min-height: calc(100vh - 3.5rem);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
  }
  .te-sidebar nav {
    flex: 1 1 auto;
  }
  .te-shell:has(#navLinks.open) .te-sidebar {
    transform: none;
  }
  .te-main {
    padding: 0.75rem 0 3rem;
  }
}