/*
 * NEXORA Application Shell — Cycle 008 / task-004 (+ responsive in task-005)
 * -------------------------------------------------------------------------
 * Authenticated shell: fixed sidebar (primary + engagement-context nav),
 * sticky topbar (org context + user), and the workspace that renders the
 * current product view. Semantic landmarks (nav/header/main) + accessible
 * focus. Nav visibility is presentation-only; authorization stays server-side.
 */

.nx-app {
  min-height: 100dvh;
  background: var(--nx-bg);
  color: var(--nx-text);
}

/* ---- Accessibility: skip link + visible keyboard focus ---- */
.nx-skip {
  position: absolute;
  left: 0.5rem;
  top: -3rem;
  z-index: 100;
  padding: 0.5rem 0.9rem;
  background: var(--nx-gold);
  color: var(--nx-on-gold);
  border-radius: var(--nx-radius);
  font-weight: 600;
  transition: top var(--nx-dur) var(--nx-ease);
}
.nx-skip:focus {
  top: 0.5rem;
}
.nx-app :focus-visible {
  outline: none;
  box-shadow: var(--nx-ring);
  border-radius: var(--nx-radius-sm);
}

/* ============================ Shell grid ============================ */
.nx-shell {
  display: grid;
  grid-template-columns: var(--nx-sidebar-w) minmax(0, 1fr);
  min-height: 100dvh;
}
.nx-shell.is-collapsed {
  grid-template-columns: var(--nx-sidebar-collapsed-w) minmax(0, 1fr);
}

/* ---- Collapsed rail: icon-only, but labels stay in the a11y tree ---- */
.nx-shell.is-collapsed .nx-brand-wordmark {
  display: none;
}
.nx-shell.is-collapsed .nx-brand-mark {
  display: block;
}
.nx-shell.is-collapsed .nx-sidebar-brand {
  justify-content: center;
  padding: 0;
}
.nx-shell.is-collapsed .nx-nav-link {
  justify-content: center;
  padding-inline: 0;
}
.nx-shell.is-collapsed .nx-nav-group-label {
  justify-content: center;
  padding: 0;
}
.nx-shell.is-collapsed .nx-nav-label,
.nx-shell.is-collapsed .nx-nav-group-label span {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
.nx-main {
  display: flex;
  flex-direction: column;
  min-width: 0; /* prevents workspace content from forcing horizontal overflow */
}

/* ============================ Sidebar ============================ */
.nx-sidebar {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--nx-bg-2);
  border-right: 1px solid var(--nx-border);
}

.nx-sidebar-brand {
  display: flex;
  align-items: center;
  height: var(--nx-topbar-h);
  padding: 0 var(--nx-space-4);
  border-bottom: 1px solid var(--nx-border);
}
.nx-brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}
.nx-brand-wordmark {
  height: 24px;
  width: auto;
  display: block;
}
.nx-brand-mark {
  height: 26px;
  width: 26px;
  display: none;
}

.nx-sidebar-scroll {
  flex: 1;
  overflow-y: auto;
  padding: var(--nx-space-3) var(--nx-space-3) var(--nx-space-5);
}

.nx-nav {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nx-nav-link {
  display: flex;
  align-items: center;
  gap: var(--nx-space-3);
  padding: 0.5rem 0.7rem;
  border-radius: var(--nx-radius);
  border-left: 2px solid transparent;
  color: var(--nx-text-muted);
  text-decoration: none;
  font-size: var(--nx-fs-sm);
  font-weight: 500;
  white-space: nowrap;
  transition: background var(--nx-dur) var(--nx-ease), color var(--nx-dur) var(--nx-ease);
}
.nx-nav-link:hover {
  background: var(--nx-panel);
  color: var(--nx-text);
}
.nx-nav-link.is-active {
  color: var(--nx-gold-bright);
  background: var(--nx-gold-dim);
  border-left-color: var(--nx-gold);
}
.nx-nav-icon {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
}
.nx-nav-link.is-active .nx-nav-icon {
  color: var(--nx-gold);
}
.nx-nav-label {
  overflow: hidden;
  text-overflow: ellipsis;
}

.nx-nav-group {
  margin-top: var(--nx-space-4);
}
.nx-nav-group-label {
  display: flex;
  align-items: center;
  gap: var(--nx-space-2);
  margin: 0 0 var(--nx-space-2);
  padding: 0 0.7rem;
  font-family: var(--nx-font-display);
  font-size: var(--nx-fs-micro);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--nx-text-dim);
}
.nx-nav-group-label svg {
  width: 13px;
  height: 13px;
  flex: 0 0 13px;
  color: var(--nx-gold);
}
.nx-nav-group-label span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ============================ Topbar ============================ */
.nx-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: var(--nx-space-3);
  height: var(--nx-topbar-h);
  padding: 0 var(--nx-space-5);
  background: color-mix(in srgb, var(--nx-bg-2) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--nx-border);
}
.nx-topbar-context {
  display: flex;
  align-items: center;
  gap: var(--nx-space-4);
  flex: 1;
  min-width: 0;
}
.nx-topbar-org {
  display: inline-flex;
  align-items: center;
  gap: var(--nx-space-2);
  color: var(--nx-text-muted);
  font-size: var(--nx-fs-sm);
  min-width: 0;
}
.nx-topbar-org svg {
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
  color: var(--nx-gold);
}
.nx-topbar-org-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.nx-topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--nx-space-3);
}
.nx-user-name {
  font-size: var(--nx-fs-sm);
  color: var(--nx-text);
}
.nx-logout-form {
  display: inline;
  margin: 0;
}

.nx-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--nx-radius);
  border: 1px solid transparent;
  background: transparent;
  color: var(--nx-text-muted);
  cursor: pointer;
  transition: background var(--nx-dur), color var(--nx-dur), border-color var(--nx-dur);
}
.nx-icon-btn:hover {
  background: var(--nx-panel);
  color: var(--nx-text);
  border-color: var(--nx-border);
}
.nx-icon-btn svg {
  width: 20px;
  height: 20px;
}
.nx-sidebar-toggle {
  display: none; /* mobile only */
}
.nx-sidebar-collapse svg {
  transition: transform var(--nx-dur) var(--nx-ease);
}
.nx-shell.is-collapsed .nx-sidebar-collapse svg {
  transform: rotate(180deg);
}

/* ============================ Workspace ============================ */
.nx-workspace {
  flex: 1;
  width: 100%;
  max-width: var(--nx-workspace-max);
  margin: 0 auto;
  padding: var(--nx-space-6) var(--nx-space-6) var(--nx-space-7);
}
.nx-workspace:focus {
  outline: none;
}

/* ---- Flash ---- */
.nx-flash {
  margin: 0 0 var(--nx-space-4);
  padding: 0.75rem 1rem;
  border-radius: var(--nx-radius);
  border: 1px solid var(--nx-border);
  font-size: var(--nx-fs-sm);
}
.nx-flash-notice {
  border-color: var(--nx-border-gold);
  background: var(--nx-gold-dim);
  color: var(--nx-gold-bright);
}
.nx-flash-alert {
  border-color: rgba(255, 76, 76, 0.4);
  background: var(--nx-danger-dim);
  color: var(--nx-danger);
}

/* ============================ Base buttons (formalized in task-006) ==== */
.nx-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--nx-space-2);
  padding: 0.5rem 1rem;
  border-radius: var(--nx-radius);
  border: 1px solid var(--nx-border);
  background: var(--nx-panel);
  color: var(--nx-text);
  font: inherit;
  font-size: var(--nx-fs-sm);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--nx-dur), border-color var(--nx-dur), color var(--nx-dur);
}
.nx-btn:hover {
  border-color: var(--nx-text-dim);
}
.nx-btn-primary {
  background: var(--nx-gold);
  border-color: var(--nx-gold);
  color: var(--nx-on-gold);
}
.nx-btn-primary:hover {
  background: var(--nx-gold-bright);
  border-color: var(--nx-gold-bright);
}

/* ============================ Guest (signed-out) shell ============= */
.nx-guest {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}
.nx-guest-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nx-topbar-h);
  padding: 0 var(--nx-space-6);
  border-bottom: 1px solid var(--nx-border);
  background: var(--nx-bg-2);
}
.nx-guest-actions {
  display: flex;
  align-items: center;
  gap: var(--nx-space-4);
}
.nx-guest-link {
  color: var(--nx-text);
  text-decoration: none;
  font-size: var(--nx-fs-sm);
  font-weight: 500;
}
.nx-guest-link:hover {
  color: var(--nx-gold-bright);
}
.nx-guest-main {
  flex: 1;
  width: 100%;
  max-width: var(--nx-workspace-max);
  margin: 0 auto;
  padding: var(--nx-space-7) var(--nx-space-6);
}

/* ============================ Scrim (mobile drawer) =============== */
.nx-scrim {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 30;
  background: rgba(0, 0, 0, 0.55);
}

/* ============================ Responsive (baseline; task-005) ===== */
@media (max-width: 900px) {
  .nx-shell,
  .nx-shell.is-collapsed {
    grid-template-columns: minmax(0, 1fr);
  }
  .nx-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 40;
    width: var(--nx-sidebar-w);
    transform: translateX(-100%);
    transition: transform var(--nx-dur) var(--nx-ease);
  }
  .nx-app .is-nav-open .nx-sidebar,
  .is-nav-open > .nx-sidebar {
    transform: translateX(0);
  }
  .is-nav-open .nx-scrim {
    display: block;
  }
  .nx-sidebar-toggle {
    display: inline-flex;
  }
  .nx-sidebar-collapse {
    display: none;
  }
  .nx-workspace {
    padding: var(--nx-space-5) var(--nx-space-4) var(--nx-space-6);
  }
}