.thread {
  max-width: 40rem;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding-bottom: 0.5rem;
}
.bubble {
  max-width: 78%;
  padding: 0.75rem 0.9rem;
  border-radius: 1.05rem;
  line-height: 1.45;
  font-size: 0.92rem;
}
.bubble.them {
  align-self: flex-start;
  background: var(--skin-surface-2);
  border: 1px solid var(--skin-border);
}
.bubble.me {
  align-self: flex-end;
  background: color-mix(in srgb, var(--skin-accent) 22%, var(--skin-surface));
  border: 1px solid color-mix(in srgb, var(--skin-accent) 35%, var(--skin-border));
}
.bubble p { margin: 0.35em 0; }
.bubble p:first-child { margin-top: 0; }
.bubble p:last-child { margin-bottom: 0; }
.bubble.is-pending { opacity: 0.55; }
.thread-empty {
  margin: 2rem 1rem;
  text-align: center;
  color: var(--skin-muted);
  font-size: 0.9rem;
}
.composer {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  width: 100%;
  margin: 0;
  padding: 0.5rem 0.85rem calc(0.55rem + var(--safe-b));
  background: color-mix(in srgb, var(--skin-surface) 88%, transparent);
  border-top: 1px solid var(--skin-border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.composer[hidden] { display: none !important; }
.composer-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  min-height: 2.2rem;
}
.tool-btn {
  width: 2.2rem;
  height: 2.2rem;
  display: grid;
  place-items: center;
  border-radius: 0.75rem;
  color: var(--skin-muted);
  background: color-mix(in srgb, var(--skin-surface-2) 70%, transparent);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--skin-border) 80%, transparent);
  font-size: 0.84rem;
  transition: background 0.14s ease, color 0.14s ease, transform 0.14s ease;
}
.tool-btn:hover {
  color: var(--skin-text);
  background: color-mix(in srgb, var(--skin-accent) 14%, var(--skin-surface-2));
}
.tool-btn:active { transform: scale(0.96); }
.tool-btn.is-on {
  color: var(--skin-btn-text);
  background: var(--skin-btn);
  box-shadow: none;
}
.tool-btn[data-tool="image"],
.tool-btn[data-tool="eye"],
.tool-btn[data-tool="play"] { display: none !important; }
.tool-btn[data-tool="regen"] { color: var(--skin-muted); }
.tool-btn[data-tool="behaviour"] { color: #f9a8d4; }
.tool-btn.is-on[data-tool] { color: var(--skin-btn-text); }
.composer-clocks {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-left: auto;
  padding-right: 0.1rem;
}
.clock {
  display: inline-flex;
  align-items: center;
  gap: 0.32rem;
  font-size: 0.7rem;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
  color: var(--skin-muted);
}
.clock i { font-size: 0.68rem; }
.clock-rp { color: var(--skin-accent-soft); }
.composer-row {
  display: flex;
  align-items: flex-end;
  gap: 0.55rem;
}
.composer-well {
  flex: 1 1 auto;
  min-width: 0;
  min-height: 3rem;
  padding: 0.85rem 1rem;
  border-radius: 1.1rem;
  background: var(--skin-surface);
  border: 1px solid var(--skin-border);
  color: var(--skin-text);
  outline: none;
  white-space: pre-wrap;
}
.composer-well.is-empty::before {
  content: attr(data-ph);
  color: var(--skin-muted);
  pointer-events: none;
}
.send-orb {
  flex: 0 0 auto;
  width: 3rem;
  height: 3rem;
  border-radius: 1rem;
  background: var(--skin-btn);
  color: var(--skin-btn-text);
  box-shadow: 0 10px 22px color-mix(in srgb, var(--skin-accent) 28%, transparent);
}
.send-orb:disabled { opacity: 0.45; }

.panel-card {
  max-width: 36rem;
  margin: 1.5rem auto;
  padding: 1.4rem;
  border-radius: 1.2rem;
  background: var(--skin-surface);
  border: 1px solid var(--skin-border);
}
.panel-card h2 {
  margin: 0 0 0.4rem;
  font-family: var(--skin-display);
}
.panel-card p { margin: 0; color: var(--skin-muted); }

.sheet-behaviour .bh-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 0 0.85rem 1.2rem;
}
.sheet-behaviour .bh-version {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin: 0.35rem 1rem 1rem;
  padding-top: 0.7rem;
  border-top: 1px solid var(--skin-border);
}
.bh-version[hidden] { display: none !important; }
.bh-version-now {
  margin: 0;
  font-size: 0.85rem;
  color: var(--skin-text);
}
.bh-version-new {
  margin: 0;
  padding: 0.35rem 0.55rem;
  border-radius: 0.55rem;
  background: color-mix(in srgb, var(--skin-accent) 16%, transparent);
  color: var(--skin-text);
  font-size: 0.8rem;
  font-weight: 650;
}
.bh-version-new[hidden] { display: none !important; }
.bh-tabs {
  margin: 0 0.55rem 0.15rem;
}
.sheet-behaviour #bh-temp-val {
  font-style: normal;
  color: var(--skin-muted);
  font-variant-numeric: tabular-nums;
}
.sheet-behaviour .lab-seg button { flex: 1; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.chapter-nav {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  max-width: 40rem;
  margin: 0 auto 0.55rem;
  padding: 0.35rem 0.15rem;
  background: color-mix(in srgb, var(--skin-canvas, var(--skin-surface)) 92%, transparent);
  backdrop-filter: blur(10px);
}
.chapter-nav[hidden] { display: none !important; }
.chapter-nav-btn {
  width: 2.1rem;
  height: 2.1rem;
  display: grid;
  place-items: center;
  border-radius: 0.7rem;
  color: var(--skin-text);
  background: color-mix(in srgb, var(--skin-surface-2) 70%, transparent);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--skin-border) 80%, transparent);
}
.chapter-nav-btn:disabled { opacity: 0.35; }
.chapter-nav-select-wrap { flex: 1; min-width: 0; }
.chapter-nav-select-wrap select {
  width: 100%;
  height: 2.1rem;
  padding: 0 0.65rem;
  border-radius: 0.7rem;
  border: 1px solid var(--skin-border);
  background: var(--skin-surface);
  color: var(--skin-text);
  font: inherit;
  font-weight: 650;
}
.chapter-stream-chrome { margin: 0.15rem 0 0.55rem; }
.chapter-stream-next { margin-top: 0.7rem; }
.chapter-stream-btn {
  border: 0;
  padding: 0;
  background: none;
  color: var(--skin-accent-soft);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 700;
}
.chapter-recap {
  padding: 0.75rem 0.85rem;
  border-radius: 0.9rem;
  background: var(--skin-surface-2);
  border: 1px solid var(--skin-border);
}
.chapter-recap strong {
  display: block;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--skin-muted);
}
.chapter-recap em {
  display: block;
  margin: 0.2rem 0 0.4rem;
  font-style: normal;
  font-weight: 700;
}
.chapter-recap p { margin: 0; color: var(--skin-text); font-size: 0.88rem; line-height: 1.45; }
.tool-btn[data-tool="chapter"] { color: #86efac; transition: color 0.45s ease; }
@keyframes chapter-book-pulse {
  0%, 100% { transform: scale(1); filter: brightness(1); }
  50% { transform: scale(1.14); filter: brightness(1.25); }
}
.tool-btn[data-tool="chapter"].is-pulse {
  animation: chapter-book-pulse 1.35s ease-in-out infinite;
}
.tool-btn[data-tool="bond-debug"] { color: #fbbf24; }
.tool-btn[data-tool="cost-debug"] { color: #7dd3fc; }
body:not([data-admin="1"]) #btn-bond-debug,
body:not([data-admin="1"]) #btn-cost-debug { display: none !important; }
.chapter-sheet-actions {
  display: flex;
  gap: 0.5rem;
  padding: 0.4rem 0.85rem 1rem;
}
.chapter-sheet-actions .studio-btn,
.chapter-sheet-actions .studio-save { flex: 1; }
.cost-debug-body {
  margin: 0.35rem 0.85rem 1rem;
  overflow: auto;
  max-height: min(70vh, 36rem);
}
.cost-debug-label {
  margin: 0.7rem 0 0.35rem;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--skin-muted);
}
.cost-debug-wrap { overflow-x: auto; }
.cost-debug-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.72rem;
  line-height: 1.35;
}
.cost-debug-table th,
.cost-debug-table td {
  padding: 0.28rem 0.4rem;
  text-align: right;
  border-bottom: 1px solid var(--skin-border);
  white-space: nowrap;
}
.cost-debug-table thead th {
  color: var(--skin-muted);
  font-weight: 600;
  text-align: right;
}
.cost-debug-table tbody th { text-align: left; }
.bond-debug-pre {
  margin: 0.35rem 0.85rem 1rem;
  padding: 0.75rem 0.8rem;
  border-radius: 0.75rem;
  background: var(--skin-surface-2);
  border: 1px solid var(--skin-border);
  color: var(--skin-text);
  font-size: 0.72rem;
  line-height: 1.4;
  white-space: pre-wrap;
  word-break: break-word;
  overflow: auto;
  max-height: min(70vh, 36rem);
}