/* Question navigation rail — one dot per user message.
   Logical properties only: no RTL special-casing needed. */

.qnav-wrap {
  display: flex;
  flex: 1 1 auto;
  min-height: 0;
  min-width: 0;
}

.qnav {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding-inline: 6px;
  flex: 0 0 auto;
}

/* hairline vertical line behind the dots */
.qnav::before {
  content: "";
  position: absolute;
  inset-block: 12%;
  inset-inline-start: 50%;
  width: 1px;
  transform: translateX(-50%);
  background: var(--border);
}

.qnav:empty::before {
  display: none;
}

/* JS applies this when questionCount <= 3 (visibility is decided in
   question-nav.js, not inferred from DOM/CSS) */
.qnav.qnav--hidden {
  display: none;
}

.qnav-dot {
  position: relative;
  inline-size: 6px;
  block-size: 6px;
  padding: 0;
  border: none;
  border-radius: 999px;
  background: var(--text-3);
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease;
  flex: 0 0 auto;
}

.qnav-dot:hover {
  transform: scale(1.4);
}

.qnav-dot.is-active {
  inline-size: 8px;
  block-size: 8px;
  background: var(--primary);
}

.qnav-dot:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* truncated preview tooltip on hover/focus */
.qnav-dot::after {
  content: attr(data-preview);
  position: absolute;
  inset-block-start: 50%;
  inset-inline-start: calc(100% + 10px);
  transform: translateY(-50%);
  max-inline-size: 220px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding-block: 4px;
  padding-inline: 8px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-2);
  font-size: 11px;
  line-height: 1.4;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.12s ease;
  z-index: 40;
}

.qnav-dot:hover::after,
.qnav-dot:focus-visible::after {
  opacity: 1;
}

/* Mobile chip ("N / M") — hidden on desktop */
.qnav-mobile {
  display: none;
}

.qnav-sheet {
  display: none;
}

@media (max-width: 767px) {
  .qnav {
    display: none;
  }

  .qnav-mobile {
    display: block;
    position: absolute;
    inset-block-end: calc(100% + 8px);
    inset-inline-start: 0;
    padding-block: 4px;
    padding-inline: 10px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-2);
    font-size: 11px;
    font-weight: 600;
    line-height: 1.4;
    cursor: pointer;
    z-index: 15;
  }

  .qnav-mobile[hidden] {
    display: none;
  }

  .qnav-mobile:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
  }

  .qnav-sheet {
    display: flex;
    flex-direction: column;
    gap: 2px;
    position: absolute;
    inset-block-end: calc(100% + 40px);
    inset-inline: 0;
    max-block-size: 45vh;
    overflow-y: auto;
    padding-block: 6px;
    padding-inline: 6px;
    border-radius: 14px;
    border: 1px solid var(--border);
    background: var(--surface);
    box-shadow: var(--shadow-lg, 0 8px 24px rgba(0, 0, 0, 0.25));
    z-index: 30;
  }

  .qnav-sheet[hidden] {
    display: none;
  }

  .qnav-sheet-item {
    text-align: start;
    padding-block: 8px;
    padding-inline: 10px;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: var(--text-2);
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    cursor: pointer;
  }

  .qnav-sheet-item:hover,
  .qnav-sheet-item:focus-visible {
    background: var(--chat-bg);
    color: var(--primary);
    outline: none;
  }
}