* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif; background: #f6f7f9; color: #1f2430; }
.hidden { display: none !important; }
.muted { color: #6b7280; font-size: 0.9em; }
.error { color: #b91c1c; }
button { font: inherit; color: #1f2430; -webkit-appearance: none; appearance: none; cursor: pointer; border: 1px solid #c9ced6; background: #fff; border-radius: 6px; padding: 0.35em 0.8em; }
button:hover { background: #eef1f5; }
button.danger { color: #b91c1c; border-color: #e5b4b4; }
button.primary { background: #1f2430; color: #fff; border-color: #1f2430; font-weight: 700; padding: 0.55em 1.2em; }
button.primary:hover { background: #39415a; }
input, textarea, select { width: 100%; padding: 0.45em 0.6em; border: 1px solid #c9ced6; border-radius: 6px; font: inherit; background: #fff; }
label { display: block; margin: 0.6em 0; font-size: 0.92em; }
.row { display: flex; gap: 0.5em; flex-wrap: wrap; margin-top: 0.6em; }

.app-header { display: flex; align-items: baseline; gap: 1em; padding: 0.8em 1.2em; background: #1f2430; color: #fff; }
.app-header h1 { font-size: 1.25em; margin: 0; }
.app-header .muted { color: #aab2c0; }
.app-header #logout-btn { margin-left: auto; background: transparent; color: #fff; border-color: #6b7280; }
.app-header #logout-btn:hover { background: #39415a; }

.gate { max-width: 420px; margin: 3em auto; background: #fff; padding: 1.5em; border-radius: 10px; border: 1px solid #e2e5ea; }
.gate form { display: flex; gap: 0.5em; }
.gate input { flex: 1; }

.layout { display: flex; gap: 1em; padding: 1em; align-items: flex-start; max-width: 1200px; margin: 0 auto; }
.sidebar { width: 280px; flex-shrink: 0; }
.content { flex: 1; min-width: 0; }
@media (max-width: 760px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; }
}

.sidebar-head { display: flex; justify-content: space-between; align-items: center; }
.sidebar-head h2, .board-head h2 { margin: 0.2em 0; }
.board-list { list-style: none; margin: 0.5em 0; padding: 0; }
.board-list li { display: flex; align-items: center; gap: 0.5em; padding: 0.55em 0.7em; background: #fff; border: 1px solid #e2e5ea; border-radius: 8px; margin-bottom: 0.4em; cursor: pointer; }
.board-list li.active { outline: 2px solid #1f2430; }
.board-list .dot { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; }
.board-list .bname { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.board-list .count { margin-left: auto; color: #6b7280; font-size: 0.85em; }
.badge { font-size: 0.75em; padding: 0.15em 0.55em; border-radius: 999px; background: #e5e7eb; color: #374151; }
.badge.shared { background: #dbeafe; color: #1d4ed8; }

.panel { background: #fff; border: 1px solid #e2e5ea; border-radius: 10px; padding: 1em; margin: 0.8em 0; }
.panel h3 { margin-top: 0; }
.color-row { display: flex; align-items: center; gap: 0.6em; }
.color-row input[type="color"] { width: 48px; padding: 0.15em; }
.swatches { display: inline-flex; gap: 0.3em; flex-wrap: wrap; }
.swatches button { display: inline-flex; align-items: center; gap: 0.35em; padding: 0.2em 0.55em; border-radius: 999px; font-size: 0.8em; }
.swatches .chip { width: 12px; height: 12px; border-radius: 50%; border: 1px solid rgba(0,0,0,0.15); flex-shrink: 0; }

.board-head { display: flex; align-items: center; gap: 0.7em; flex-wrap: wrap; }
.toolbar { margin: 0.6em 0; }

.post-list { list-style: none; margin: 0; padding: 0; }
.post { background: #fff; border: 1px solid #e2e5ea; border-radius: 10px; padding: 0.9em 1em; margin-bottom: 0.7em; }
.post.pinned { border-color: #f59e0b; background: #fffbeb; }
.post-head { display: flex; align-items: baseline; gap: 0.6em; flex-wrap: wrap; }
.post-title { font-weight: 700; font-size: 1.05em; }
.pin-badge { color: #b45309; font-size: 0.8em; font-weight: 700; }
.post-meta { color: #6b7280; font-size: 0.82em; }
.post-body { white-space: pre-wrap; word-break: break-word; margin: 0.5em 0; }
.post-actions { display: flex; gap: 0.4em; flex-wrap: wrap; }
.post-actions button { font-size: 0.85em; padding: 0.25em 0.6em; }
.replies { margin-top: 0.7em; border-top: 1px dashed #d4d8de; padding-top: 0.6em; }
.replies ul { list-style: none; margin: 0 0 0.6em; padding: 0; }
.replies li { padding: 0.45em 0.6em; background: #f6f7f9; border-radius: 8px; margin-bottom: 0.4em; }
.reply-body { white-space: pre-wrap; word-break: break-word; }
.reply-form { display: flex; gap: 0.5em; align-items: flex-start; }
.reply-form textarea { flex: 1; }
.reply-form .rcol { display: flex; flex-direction: column; gap: 0.4em; }