/* Design rationale: docs/claude_context/messageboard.md */
.messageboard {
  position: relative;
  height: 20rem;
  box-sizing: border-box;
  margin: 1rem 0 0.5rem;
  padding: 1.5rem 3.5rem 2.5rem 3.5rem;
  background-color: var(--color-card-bg);
  border-radius: 12px;
  box-shadow: 0 3px 8px var(--color-shadow);
}

.messageboard-slide {
  display: none;
  height: 100%;
}

.messageboard-slide.active {
  display: flex;
  flex-direction: column;
}

.messageboard-slide h2 {
  flex: 0 0 auto;
  margin: 0 0 0.25rem;
}

.messageboard-date {
  flex: 0 0 auto;
  margin: 0;
  font-size: 0.85rem;
  opacity: 0.7;
}

.messageboard-body-wrap {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  padding-bottom: 1.75rem;
}

.messageboard-body {
  height: 100%;
  margin: 0;
  padding-right: 0.9rem;
  overflow-y: auto;
  scrollbar-width: none;
}

.messageboard-body p {
  font-size: 1.2rem;
  letter-spacing: -0.05rem;
  line-height: 1.2;
}

.messageboard-body::-webkit-scrollbar {
  display: none;
}

.messageboard-scrollbar {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 1.75rem;
  width: 14px;
  cursor: pointer;
  touch-action: none;
}

.messageboard-scrollbar-thumb {
  display: none;
  position: absolute;
  left: 0;
  width: 100%;
  cursor: grab;
  touch-action: none;
}

.messageboard-scrollbar-thumb::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 4px;
  transform: translateX(-50%);
  border-radius: 999px;
  background-color: var(--color-text);
}

.messageboard-scrollbar-thumb:active {
  cursor: grabbing;
}

.messageboard-signature {
  position: absolute;
  right: 3.5rem;
  bottom: 0.4rem;
  max-width: 45%;
  margin: 0;
  text-align: right;
  font-style: italic;
  line-height: 1.15;
}

.messageboard-expand {
  display: none;
}

.messageboard-controls {
  display: contents;
}

.messageboard-prev,
.messageboard-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: 1.5rem;
  font-family: inherit;
  line-height: 1;
  color: var(--color-text);
  cursor: pointer;
}

.messageboard-prev {
  left: 1rem;
}

.messageboard-next {
  right: 1rem;
}

.messageboard-prev:hover,
.messageboard-prev:focus-visible,
.messageboard-next:hover,
.messageboard-next:focus-visible {
  color: var(--color-accent-hover);
}

.messageboard-dots {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.35rem 0.9rem;
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: 999px;
}

@media (max-width: 72rem) {
  .messageboard {
    height: auto;
    max-height: 34rem;
    margin: 0.5rem 0;
    padding: 1rem 1.25rem;
  }

  .messageboard-slide h2 {
    font-size: 1.25rem;
    text-align: center;
  }

  .messageboard-date {
    font-size: 0.7rem;
    text-align: center;
  }

  .messageboard-slide {
    height: auto;
  }

  .messageboard-body-wrap {
    flex: 0 1 auto;
    padding-bottom: 0;
  }

  .messageboard-body {
    height: auto;
    max-height: none;
    text-align: center;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 6;
    line-clamp: 6;
    overflow: hidden;
  }

  .messageboard-scrollbar {
    display: none;
  }

  .messageboard-expand {
    margin: 0.5rem auto 0;
    background: none;
    border: none;
    padding: 0;
    color: var(--color-accent-hover);
    text-decoration: underline;
    font: inherit;
    font-size: 0.85rem;
    cursor: pointer;
  }

  .messageboard-expand.is-visible {
    display: block;
  }

  .messageboard-signature {
    position: static;
    max-width: none;
    padding-left: 0;
    margin-top: 0.35rem;
    text-align: right;
    font-size: 0.8rem;
  }

  .messageboard-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
  }

  .messageboard-prev,
  .messageboard-next {
    position: static;
    transform: none;
  }

  .messageboard-dots {
    position: static;
    left: auto;
    bottom: auto;
    transform: none;
    margin: 0;
  }
}

.messageboard-dot {
  position: relative;
  width: 0.5rem;
  height: 0.5rem;
  padding: 0;
  border: none;
  border-radius: 50%;
  background-color: var(--color-accent);
  cursor: pointer;
}

.messageboard-dot.active {
  position: relative;
  z-index: 0;
  width: 0.85rem;
  height: 0.85rem;
}

.messageboard-dot.seen {
  --progress: 100;
}

.messageboard-dot.seen::before,
.messageboard-dot.active::before {
  content: "";
  position: absolute;
  z-index: 1;
  inset: -2px;
  border-radius: 50%;
  background: conic-gradient(var(--color-text) calc(var(--progress, 0) * 1%), transparent 0);
  -webkit-mask: radial-gradient(closest-side, transparent 68%, black 74%, black 100%);
  mask: radial-gradient(closest-side, transparent 68%, black 74%, black 100%);
  pointer-events: none;
}