/* ============================================
   Board — Slack-like Channel & DM View
   ============================================ */

/* ── Layout ─────────────────────────────────── */

.board-layout {
  display: flex;
  height: calc(100svh - 140px);
  min-height: 400px;
  background: var(--aw-color-bg-primary);
  border-radius: 10px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  overflow: hidden;
}

/* ── Sidebar ────────────────────────────────── */

.board-sidebar {
  width: 250px;
  min-width: 250px;
  background: var(--aw-color-bg-panel);
  border-right: 1px solid var(--aw-color-border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.board-sidebar-section {
  padding: 12px 16px 4px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--aw-color-sidebar-section);
}

.board-sidebar-divider {
  height: 1px;
  background: var(--aw-color-border);
  margin: 8px 16px;
}

/* ── DM Filter ─────────────────────────────── */

.board-dm-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}

.board-dm-filter {
  font-size: 0.7rem;
  padding: 2px 4px;
  border: 1px solid var(--aw-color-border-input);
  border-radius: 4px;
  background: var(--aw-color-bg-primary);
  color: var(--aw-color-text-secondary);
  cursor: pointer;
  max-width: 110px;
  outline: none;
}

.board-dm-filter:focus {
  border-color: var(--aw-color-accent);
}

/* ── DM Sidebar Item ───────────────────────── */

.board-dm-item {
  padding: 6px 16px;
}

.board-dm-participants {
  display: flex;
  align-items: center;
  gap: 4px;
  min-width: 0;
  overflow: hidden;
  font-size: 0.84rem;
}

.board-dm-arrow {
  color: var(--aw-color-sidebar-section);
  flex-shrink: 0;
  font-size: 0.75rem;
  margin: 0 1px;
}

.board-dm-mini-avatar {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  object-fit: cover;
  flex-shrink: 0;
}

.board-dm-mini-avatar-placeholder {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 4px;
  background: var(--aw-color-border-subtle);
  color: var(--aw-color-text-secondary);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  flex-shrink: 0;
}

.board-sidebar-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 0.88rem;
  color: var(--aw-color-text-secondary);
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
  border-left: 3px solid transparent;
}

.board-sidebar-item:hover,
.board-sidebar-item:active {
  background: var(--aw-color-bg-alt);
  color: var(--aw-color-info-text);
}

.board-sidebar-item:focus-visible {
  outline: 2px solid var(--aw-color-accent);
  outline-offset: -2px;
}

.board-sidebar-item.active {
  background: var(--aw-color-accent-bg);
  color: var(--aw-color-accent-hover);
  border-left-color: var(--aw-color-accent);
  font-weight: 600;
}

.board-sidebar-item-prefix {
  color: var(--aw-color-sidebar-section);
  font-weight: 500;
  flex-shrink: 0;
}

.board-sidebar-item.active .board-sidebar-item-prefix {
  color: var(--aw-color-accent-light);
}

.board-sidebar-item-count {
  margin-left: auto;
  font-size: 0.72rem;
  color: var(--aw-color-sidebar-section);
  background: var(--aw-color-border-subtle);
  padding: 1px 6px;
  border-radius: 999px;
}

/* ── Main Panel ─────────────────────────────── */

.board-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}

/* ── Channel Header ─────────────────────────── */

.board-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--aw-color-border);
  background: var(--aw-color-bg-primary);
  flex-shrink: 0;
}

.board-header-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--aw-color-text-primary);
}

.board-header-meta {
  font-size: 0.78rem;
  color: var(--aw-color-sidebar-section);
}

/* ── Message List ───────────────────────────── */

.board-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-height: 0;
}

.board-messages-empty {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--aw-color-sidebar-section);
  font-size: 0.92rem;
}

/* ── Message Row ────────────────────────────── */

.board-msg {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 6px 4px;
  border-radius: 6px;
  transition: background 0.1s;
}

.board-msg:hover {
  background: var(--aw-color-bg-panel);
}

.board-msg-avatar {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--aw-color-border-subtle);
  color: var(--aw-color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  font-weight: 700;
  flex-shrink: 0;
  text-transform: uppercase;
  overflow: hidden;
}

.board-msg-avatar.human {
  background: var(--aw-color-accent-bg);
  color: var(--aw-color-accent-hover);
}

.board-msg-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 8px;
}

.board-msg-body {
  flex: 1;
  min-width: 0;
}

.board-msg-header {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 2px;
}

.board-msg-from {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--aw-color-text-primary);
}

.board-msg-ts {
  font-size: 0.72rem;
  color: var(--aw-color-sidebar-section);
}

.board-msg-badge {
  display: inline-flex;
  align-items: center;
  padding: 0 5px;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: 3px;
  background: var(--aw-color-accent-bg);
  color: var(--aw-color-accent-hover);
}

.board-msg-text {
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--aw-color-text-primary);
  word-wrap: break-word;
}

/* ── Markdown in messages ──────────────────── */

.board-markdown {
  white-space: normal;
}
.board-markdown p { margin: 0.3em 0; }
.board-markdown p:first-child { margin-top: 0; }
.board-markdown p:last-child { margin-bottom: 0; }
.board-markdown h1,
.board-markdown h2,
.board-markdown h3,
.board-markdown h4 { margin: 0.5em 0 0.25em; line-height: 1.3; }
.board-markdown h1 { font-size: 1.1em; }
.board-markdown h2 { font-size: 1.05em; }
.board-markdown h3 { font-size: 1em; }
.board-markdown ul,
.board-markdown ol { margin: 0.3em 0; padding-left: 1.4em; }
.board-markdown li { margin: 0.15em 0; }
.board-markdown code {
  background: var(--aw-color-code-inline-bg);
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 0.88em;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}
.board-markdown pre {
  background: var(--aw-color-code-bg);
  color: var(--aw-color-code-text);
  padding: 8px 10px;
  border-radius: 4px;
  overflow-x: auto;
  margin: 0.4em 0;
  font-size: 0.85em;
}
.board-markdown pre code {
  background: none;
  padding: 0;
  color: inherit;
}
.board-markdown blockquote {
  border-left: 3px solid var(--aw-color-border-dark);
  margin: 0.4em 0;
  padding: 0.2em 0.8em;
  color: var(--aw-color-text-secondary);
}
.board-markdown table {
  border-collapse: collapse;
  margin: 0.4em 0;
  font-size: 0.88em;
}
.board-markdown th,
.board-markdown td {
  border: 1px solid var(--aw-color-border-dark);
  padding: 4px 8px;
}
.board-markdown th {
  background: var(--aw-color-bg-tertiary);
  font-weight: 600;
}
.board-markdown a {
  color: var(--aw-color-accent);
  text-decoration: underline;
}
.board-markdown hr {
  border: none;
  border-top: 1px solid var(--aw-color-border-dark);
  margin: 0.5em 0;
}

/* ── Input Bar ──────────────────────────────── */

.board-input-bar {
  display: flex;
  gap: 8px;
  align-items: flex-end;
  padding: 12px 20px;
  border-top: 1px solid var(--aw-color-border);
  background: var(--aw-color-bg-primary);
  flex-shrink: 0;
}

.board-input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--aw-color-border-input);
  border-radius: 8px;
  font-size: 0.9rem;
  font-family: inherit;
  outline: none;
  resize: none;
  min-height: 40px;
  max-height: 120px;
  line-height: 1.5;
  overflow-y: auto;
  transition: border-color 0.15s;
}

.board-input:focus {
  border-color: var(--aw-color-accent);
}

.board-input:focus-visible {
  outline: 2px solid var(--aw-color-accent);
  outline-offset: 2px;
}

.board-input:disabled {
  background: var(--aw-color-bg-subtle);
  color: var(--aw-color-text-muted);
}

.board-send-btn {
  padding: 10px 20px;
  background: var(--aw-color-accent);
  color: var(--aw-color-bg-primary);
  border: none;
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s;
  flex-shrink: 0;
}

.board-send-btn:hover:not(:disabled),
.board-send-btn:active:not(:disabled) {
  background: var(--aw-color-accent-hover);
}

.board-send-btn:focus-visible {
  outline: 2px solid var(--aw-color-accent-light);
  outline-offset: 2px;
}

.board-send-btn:disabled {
  background: var(--aw-color-accent-light);
  cursor: not-allowed;
}

/* ── No Selection State ─────────────────────── */

.board-placeholder {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--aw-color-sidebar-section);
  gap: 8px;
}

.board-placeholder-icon {
  font-size: 2.5rem;
}

.board-placeholder-text {
  font-size: 0.95rem;
}

/* ── Mobile Toggle Button ───────────────────── */

.board-mobile-toggle {
  display: none;
  width: 100%;
  padding: 10px;
  background: var(--aw-color-bg-panel);
  border: none;
  border-bottom: 1px solid var(--aw-color-border);
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--aw-color-accent);
  font-weight: 600;
  cursor: pointer;
}

/* ── Responsive: Mobile ─────────────────────── */

@media (max-width: 768px) {
  .board-layout {
    flex-direction: column;
    height: calc(100svh - 120px);
    border-radius: 0;
  }

  .board-sidebar {
    width: 100%;
    min-width: 0;
    max-height: 40vh;
    border-right: none;
    border-bottom: 1px solid var(--aw-color-border);
  }

  .board-sidebar.mobile-hidden {
    display: none;
  }

  .board-main {
    flex: 1;
    min-height: 0;
    overflow: hidden;
  }

  .board-mobile-toggle {
    display: block;
  }

  .board-header {
    padding: 10px 14px;
  }

  .board-messages {
    padding: 10px 14px;
  }

  .board-input-bar {
    padding: 8px 14px;
  }

  .board-msg-avatar {
    width: 32px;
    height: 32px;
    font-size: 0.75rem;
  }

  .board-sidebar-item {
    min-height: 44px;
  }

  .board-send-btn {
    min-height: 44px;
    padding: 10px 16px;
  }
}

@media (max-width: 480px) {
  .board-input-bar {
    padding: 6px 10px;
  }

  .board-header {
    padding: 8px 10px;
  }

  .board-messages {
    padding: 8px 10px;
  }
}