/* Shared admin top tab bar + logout + login overlay.
   Adding a new tab: edit ADMIN_TABS in /_assets/nav.js.
   Tokens come from /_assets/tokens.css. */

.admin-nav {
  display: flex;
  gap: 8px;
  padding: 8px 16px;
  background: var(--tw-nav-bg);
  border-bottom: 1px solid var(--tw-border);
  flex-wrap: wrap;
  align-items: center;
  /* Bleed to body edge — body padding: 20px on every tool page. */
  margin: -20px -20px 16px -20px;
  /* Stick at viewport top while content scrolls beneath. */
  position: sticky;
  top: 0;
  z-index: 100;
}

.admin-nav .label {
  font-size: 10px;
  color: var(--tw-muted-2);
  align-self: center;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-right: 4px;
}

.admin-nav a {
  padding: 6px 14px;
  border-radius: var(--tw-radius-sm);
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
  color: var(--tw-text-soft);
  background: var(--tw-card);
  border: 1px solid var(--tw-border);
  transition: background 0.15s, color 0.15s;
}

.admin-nav a:hover {
  background: var(--tw-card-highest);
  color: var(--tw-text);
}

.admin-nav a.active {
  background: var(--tw-accent);
  color: var(--tw-on-accent);
  border-color: var(--tw-accent);
}

.admin-nav .spacer {
  flex: 1;
}

.admin-nav .logout {
  padding: 6px 12px;
  border-radius: var(--tw-radius-sm);
  font-size: 11px;
  font-weight: 600;
  background: transparent;
  color: var(--tw-muted);
  border: 1px solid var(--tw-border);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.admin-nav .logout:hover {
  background: var(--tw-card);
  color: var(--tw-red);
  border-color: var(--tw-red);
}

/* Shared page header — every admin page wraps its title + subtitle in
   <header class="page-head"><h1>…</h1><p class="subtitle">…</p></header>.
   Per-page secondary controls (range selectors, view tabs, refresh) sit in
   a sibling row beneath, not inside the header.

   .subtitle is also reused as a general muted-text class elsewhere on the
   page (e.g. wizard history-status). Keep its color/size declared standalone
   so it works outside .page-head too. */
.subtitle {
  color: var(--tw-muted);
  font-size: 13px;
}
.subtitle a { color: var(--tw-accent); }
.page-head {
  margin-bottom: 16px;
}
.page-head h1 {
  color: var(--tw-accent);
  font-size: 22px;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.3px;
}
.page-head .subtitle {
  margin: 4px 0 0;
}

/* Default login overlay — used if nav.js injects #login because the page
   didn't ship one. Per-page styles can override anything below. */
#login {
  max-width: 320px;
  margin: 100px auto;
  padding: 24px;
  background: var(--tw-card);
  border: 1px solid var(--tw-border);
  border-radius: 10px;
  text-align: center;
  color: var(--tw-text);
  font-family: var(--tw-font-sans);
}

#login h1 {
  font-size: 18px;
  color: var(--tw-accent);
  margin-bottom: 6px;
}

#login .subtitle {
  font-size: 12px;
  color: var(--tw-muted);
  margin-bottom: 14px;
}

#login input {
  width: 100%;
  padding: 10px 12px;
  margin: 6px 0;
  background: var(--tw-bg);
  border: 1px solid var(--tw-border);
  border-radius: var(--tw-radius-sm);
  color: var(--tw-text);
  font-size: 14px;
}

#login button#login-btn {
  width: 100%;
  padding: 10px;
  margin-top: 6px;
  background: var(--tw-accent);
  border: none;
  border-radius: var(--tw-radius-sm);
  color: var(--tw-on-accent);
  font-weight: 600;
  cursor: pointer;
  font-size: 14px;
}

#login button#login-btn:hover { opacity: 0.9; }

#login .login-error {
  margin-top: 10px;
  font-size: 12px;
  color: var(--tw-red);
  min-height: 1em;
}

/* Screen-reader-only label utility — used by login form. */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Skip-to-main link — visually hidden until keyboard-focused. */
.skip-link {
  position: absolute;
  top: -40px;
  left: 8px;
  background: var(--tw-accent);
  color: var(--tw-on-accent);
  padding: 8px 12px;
  z-index: 1000;
  text-decoration: none;
  font-weight: 600;
  border-radius: var(--tw-radius-sm);
}
.skip-link:focus,
.skip-link:focus-visible {
  top: 8px;
  outline: 2px solid var(--tw-text);
  outline-offset: 2px;
}

kbd {
  font-family: var(--tw-font-mono);
  font-size: 0.85em;
  padding: 1px 5px;
  background: var(--tw-card);
  border: 1px solid var(--tw-border);
  border-radius: 3px;
  color: var(--tw-text);
}