/* ============================================================
   GCI Print Lab – Site Navigation (training pages)
   Adds the shared nav bar without overriding training page styles.
   ============================================================ */

/* ── Navigation Variables ─────────────────────────────────── */
.site-nav {
  --nav-primary:        #0096d6;
  --nav-primary-light:  #4fbde8;
  --nav-accent:         #ffb800;
  --nav-bg:             rgba(15, 19, 23, 0.97);
  --nav-text:           #f0f4f8;
  --nav-text-muted:     #8fa0b2;
  --nav-border:         rgba(255,255,255,0.1);
  --nav-surface-2:      #23282c;
  --nav-height:         56px;
}

body[data-theme="light"] .site-nav {
  --nav-bg: rgba(240, 244, 248, 0.97);
  --nav-text: #181c1f;
  --nav-text-muted: #4a5568;
  --nav-border: rgba(0,0,0,0.12);
  --nav-surface-2: #e8edf2;
}

/* ── Skip Link ────────────────────────────────────────────── */
.site-skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  padding: 8px 16px;
  background: #ffb800;
  color: #181c1f;
  font-weight: 600;
  border-radius: 6px;
  text-decoration: none;
  z-index: 1001;
  transition: top 150ms ease;
  font-family: inherit;
}

.site-skip-link:focus {
  top: 16px;
}

/* ── Site Nav Container ───────────────────────────────────── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--nav-border);
  height: var(--nav-height);
  box-sizing: border-box;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
  box-sizing: border-box;
}

/* ── Brand ────────────────────────────────────────────────── */
.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--nav-text);
  font-weight: 800;
  font-size: 1.05rem;
  flex-shrink: 0;
  transition: color 150ms ease;
}

.nav-brand:hover {
  color: var(--nav-primary-light);
  text-decoration: none;
}

.nav-brand:focus-visible {
  outline: 3px solid var(--nav-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.nav-brand-icon {
  font-size: 1.3rem;
  line-height: 1;
}

.nav-brand-text {
  font-weight: 800;
  color: var(--nav-text);
}

.nav-brand-text span {
  color: var(--nav-primary-light);
}

/* ── Menu ─────────────────────────────────────────────────── */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  padding: 0;
  margin: 0;
  flex: 1;
}

.nav-menu li {
  margin: 0;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 6px;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--nav-text-muted);
  transition: color 150ms ease, background 150ms ease;
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--nav-text);
  background: var(--nav-surface-2);
  text-decoration: none;
}

.nav-link:focus-visible {
  outline: 3px solid var(--nav-accent);
  outline-offset: 2px;
  color: var(--nav-text);
}

.nav-link[aria-current="page"],
.nav-link.active {
  color: var(--nav-primary-light);
  background: rgba(0, 150, 214, 0.15);
  font-weight: 600;
}

.nav-link--external {
  margin-left: auto;
  color: var(--nav-text-muted);
  border: 1px solid var(--nav-border);
}

.nav-link--external:hover {
  border-color: var(--nav-primary);
  color: var(--nav-primary-light);
  background: rgba(0, 150, 214, 0.1);
}

/* ── Hamburger Toggle ─────────────────────────────────────── */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: 1px solid var(--nav-border);
  border-radius: 6px;
  cursor: pointer;
  margin-left: auto;
  padding: 0;
  transition: background 150ms ease;
}

.nav-toggle:hover {
  background: var(--nav-surface-2);
}

.nav-toggle:focus-visible {
  outline: 3px solid var(--nav-accent);
  outline-offset: 2px;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--nav-text);
  border-radius: 2px;
  transition: transform 250ms ease, opacity 150ms ease;
  transform-origin: center;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Adjust sticky progress bar for training pages ─────────── */
.sticky-progress {
  top: calc(var(--nav-height) + 10px);
}

/* ── Mobile ───────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--nav-border);
    padding: 12px 16px 20px;
    gap: 2px;
    display: none;
    z-index: 99;
  }

  .nav-menu.is-open {
    display: flex;
  }

  .nav-link {
    padding: 10px 16px;
    font-size: 1rem;
    border-radius: 8px;
  }

  .nav-link--external {
    margin-left: 0;
    margin-top: 6px;
  }
}