/*
 * sidebar-nav.css
 *
 * Styles for the Home / Previous / Next navigation bars injected by
 * sidebar-nav.js. Two instances per page:
 *   1. .hh-nav-bar--top    — at the top of the sidebar, sticky
 *   2. .hh-nav-bar--bottom — at the bottom of the main content
 */

/* ---- Container ---- */

.hh-nav-bar {
  display: flex;
  gap: 0.4rem;
  margin: 0.6rem 0;
  padding: 0.5rem;
  border-radius: 0.4rem;
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-default-fg-color--lightest);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.hh-nav-bar--top {
  position: sticky;
  top: 0;
  z-index: 5;
  margin: 0 0 0.6rem 0;
  background: var(--md-default-bg-color);
  backdrop-filter: blur(8px);
}

/* ---- Buttons ---- */

.hh-nav-btn {
  flex: 1 1 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  padding: 0.45rem 0.5rem;
  border-radius: 0.3rem;
  font-size: 0.78rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--md-primary-fg-color);
  background: var(--md-default-fg-color--lightest);
  border: 1px solid transparent;
  transition: background 0.15s, color 0.15s, transform 0.15s;
  min-width: 0;
  overflow: hidden;
}

.hh-nav-btn:hover {
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
  transform: translateY(-1px);
}

.hh-nav-btn:active {
  transform: translateY(0);
}

.hh-nav-btn--disabled,
.hh-nav-btn--disabled:hover {
  background: var(--md-default-fg-color--lightest);
  color: var(--md-default-fg-color--light);
  cursor: not-allowed;
  pointer-events: none;
  transform: none;
  opacity: 0.5;
}

/* ---- Home button (compact) ---- */

.hh-nav-home {
  flex: 0 0 auto;
  min-width: 3.2rem;
  font-size: 0.85rem;
}

.hh-nav-home .hh-nav-icon {
  font-size: 1.1rem;
  line-height: 1;
}

/* ---- Prev / Next content layout ---- */

.hh-nav-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-width: 0;
  line-height: 1.2;
}

.hh-nav-prev .hh-nav-content {
  align-items: flex-start;
}

.hh-nav-next .hh-nav-content {
  align-items: flex-end;
  text-align: right;
}

.hh-nav-eyebrow {
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.65;
  font-weight: 600;
}

.hh-nav-title {
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.hh-nav-arrow {
  font-size: 1rem;
  font-weight: 700;
  flex: 0 0 auto;
}

/* ---- Responsive ---- */

@media (max-width: 60em) {
  .hh-nav-title {
    font-size: 0.72rem;
  }
  .hh-nav-eyebrow {
    display: none;
  }
  .hh-nav-home .hh-nav-label {
    display: none;
  }
  .hh-nav-home {
    min-width: 2.4rem;
  }
}

/* ---- Bottom bar gets extra emphasis ---- */

.hh-nav-bar--bottom {
  margin-top: 2.5rem;
  padding: 0.7rem 0.5rem;
  border-top: 2px solid var(--md-primary-fg-color);
  border-left: none;
  border-right: none;
  border-bottom: none;
  background: var(--md-default-fg-color--lightest);
}

.hh-nav-bar--bottom .hh-nav-prev,
.hh-nav-bar--bottom .hh-nav-next {
  background: var(--md-default-bg-color);
  border: 1px solid var(--md-primary-fg-color);
}