/* encode tool — circuit-trace pipeline aesthetic */
:root {
  --pipe-mono: 'IBM Plex Mono', 'Berkeley Mono', 'JetBrains Mono', monospace;
  --pipe-green: #059669;
  --pipe-green-bg: #ecfdf5;
  --pipe-amber: #d97706;
  --pipe-amber-bg: #fffbeb;
  --pipe-red: #dc2626;
  --pipe-red-bg: #fef2f2;
  --pipe-trace: #cbd5e1;
  --pipe-node-bg: #ffffff;
  --pipe-code-bg: #f1f5f9;
  --pipe-ink: #0f172a;
  --pipe-dim: #64748b;
}

#tool-root {
  font-family: var(--pipe-mono);
  font-size: 14px;
  color: var(--pipe-ink);
  min-height: 675px;
}

/* --- threading macro form display --- */
.thread-form {
  background: var(--pipe-code-bg);
  border-left: 3px solid var(--pipe-trace);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  position: relative;
}
.thread-form::before {
  content: '';
  position: absolute;
  left: -3px;
  top: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--pipe-green) 0%, var(--pipe-trace) 100%);
}
.clj-form {
  font-family: var(--pipe-mono);
  font-size: 13px;
  color: var(--pipe-ink);
  margin: 0;
  white-space: pre;
  line-height: 1.7;
  letter-spacing: -0.01em;
}
.thread-meta {
  margin-top: 0.75rem;
  display: flex;
  gap: 0.5rem;
  align-items: center;
}
.badge {
  font-family: var(--pipe-mono);
  font-size: 11px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 2px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}
.badge.reversible {
  background: var(--pipe-green-bg);
  color: var(--pipe-green);
  border: 1px solid #a7f3d0;
}
.badge.irreversible {
  background: var(--pipe-amber-bg);
  color: var(--pipe-amber);
  border: 1px solid #fde68a;
}

/* --- input --- */
.thread-input label,
.thread-output label,
.output-header label {
  font-family: var(--pipe-mono);
  font-weight: 500;
  display: block;
  margin-bottom: 0.35rem;
  color: var(--pipe-dim);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.input-sources {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  margin-bottom: 0.5rem;
}
.src-btn {
  font-family: var(--pipe-mono);
  font-size: 11px;
  padding: 3px 8px;
  border: 1px solid #e2e8f0;
  border-radius: 2px;
  background: var(--pipe-node-bg);
  cursor: pointer;
  color: var(--pipe-dim);
  transition: all 0.15s ease;
  letter-spacing: -0.01em;
}
.src-btn:hover {
  background: var(--pipe-code-bg);
  color: var(--pipe-ink);
  border-color: var(--pipe-trace);
}
.thread-input textarea {
  width: 100%;
  box-sizing: border-box;
  font-family: var(--pipe-mono);
  font-size: 14px;
  padding: 0.75rem;
  border: 1px solid #e2e8f0;
  border-radius: 2px;
  background: var(--pipe-node-bg);
  color: var(--pipe-ink);
  line-height: 1.6;
  resize: vertical;
}
.thread-input textarea:focus {
  outline: none;
  border-color: var(--pipe-green);
  box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.08);
}

/* --- pipeline trace --- */
.thread-steps {
  margin: 0;
  position: relative;
  padding-left: 1.5rem;
}
.thread-steps::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: repeating-linear-gradient(
    180deg,
    var(--pipe-trace) 0px,
    var(--pipe-trace) 4px,
    transparent 4px,
    transparent 8px
  );
}

.thread-arrow {
  text-align: left;
  font-size: 11px;
  color: var(--pipe-dim);
  padding: 2px 0;
  font-family: var(--pipe-mono);
  position: relative;
  letter-spacing: 0.05em;
}
.thread-arrow::before {
  content: '';
  position: absolute;
  left: -1.5rem;
  top: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--pipe-trace);
  border: 2px solid var(--pipe-node-bg);
  transform: translate(2px, -50%);
  z-index: 1;
}

/* --- step nodes --- */
.thread-step {
  background: var(--pipe-node-bg);
  border: 1px solid #e2e8f0;
  border-radius: 2px;
  padding: 0.5rem 0.75rem;
  position: relative;
  transition: border-color 0.15s ease;
}
.thread-step:hover {
  border-color: var(--pipe-trace);
}
.step-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.step-fn {
  font-family: var(--pipe-mono);
  font-weight: 600;
  font-size: 13px;
  color: var(--pipe-ink);
}
.step-dir {
  font-size: 11px;
  color: var(--pipe-dim);
  font-weight: 400;
  padding: 1px 6px;
  background: var(--pipe-code-bg);
  border-radius: 2px;
}
.step-controls {
  margin-left: auto;
  display: flex;
  gap: 3px;
}
.step-controls button {
  background: none;
  border: 1px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  padding: 2px 6px;
  font-size: 13px;
  color: var(--pipe-dim);
  transition: all 0.1s ease;
}
.step-controls button:hover {
  background: var(--pipe-code-bg);
  border-color: #e2e8f0;
  color: var(--pipe-ink);
}
.step-controls button:disabled {
  opacity: 0.2;
  cursor: default;
}
.step-value {
  font-family: var(--pipe-mono);
  font-size: 12px;
  margin: 0.4rem 0 0;
  padding: 0.4rem 0.6rem;
  background: var(--pipe-code-bg);
  border-radius: 2px;
  white-space: pre-wrap;
  word-break: break-all;
  color: var(--pipe-ink);
  line-height: 1.5;
  border-left: 2px solid var(--pipe-green);
}
.step-error {
  color: var(--pipe-red);
  background: var(--pipe-red-bg);
  border-left-color: var(--pipe-red);
}

/* --- add step controls --- */
.thread-add {
  display: flex;
  gap: 6px;
  align-items: center;
  margin: 1rem 0;
  padding-left: 1.5rem;
}
.thread-add select,
.thread-add button {
  font-family: var(--pipe-mono);
  padding: 4px 8px;
  border: 1px solid #e2e8f0;
  border-radius: 2px;
  font-size: 12px;
  background: var(--pipe-node-bg);
  color: var(--pipe-ink);
}
.thread-add button#enc-add-step {
  cursor: pointer;
  font-weight: 600;
  transition: all 0.1s ease;
  background: #dbeafe;
  color: #1e40af;
  border-color: #93c5fd;
}
.thread-add button#enc-add-step:hover {
  background: #bfdbfe;
  border-color: #60a5fa;
}
.thread-add button {
  cursor: pointer;
  font-weight: 500;
  transition: all 0.1s ease;
}
.thread-add button:hover {
  background: var(--pipe-code-bg);
}
.thread-add select:focus,
.thread-add button:focus {
  outline: none;
  border-color: var(--pipe-green);
}

/* --- reverse button --- */
.thread-reverse {
  margin: 0.75rem 0;
  padding-left: 1.5rem;
}
.thread-reverse button {
  font-family: var(--pipe-mono);
  padding: 4px 12px;
  border: 1px solid #a7f3d0;
  border-radius: 2px;
  cursor: pointer;
  background: var(--pipe-green-bg);
  font-size: 12px;
  color: var(--pipe-green);
  font-weight: 500;
  transition: all 0.15s ease;
}
.thread-reverse button:hover {
  background: #d1fae5;
  border-color: var(--pipe-green);
}
.thread-reverse button.warn {
  background: var(--pipe-amber-bg);
  color: var(--pipe-amber);
  border-color: #fde68a;
}
.thread-reverse button.warn:hover {
  background: #fef3c7;
  border-color: var(--pipe-amber);
}

/* --- copy buttons --- */
.copy-btn {
  font-family: var(--pipe-mono);
  font-size: 11px;
  padding: 2px 8px;
  border: 1px solid #e2e8f0;
  border-radius: 2px;
  background: var(--pipe-node-bg);
  color: var(--pipe-dim);
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}
.copy-btn:hover {
  background: var(--pipe-code-bg);
  border-color: var(--pipe-green);
  color: var(--pipe-ink);
}
.copy-btn.copied {
  background: var(--pipe-green-bg);
  border-color: var(--pipe-green);
  color: var(--pipe-green);
}
.step-value-wrap {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 6px;
}
.step-value-wrap .step-value {
  flex: 1;
  margin: 0.4rem 0 0;
}
.step-value-wrap .step-copy {
  margin-top: 0.4rem;
  flex-shrink: 0;
}
.output-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.25rem;
}
.output-actions {
  display: flex;
  gap: 6px;
}

/* --- output --- */
.thread-output {
  margin-top: 1rem;
}
.thread-output pre {
  font-family: var(--pipe-mono);
  font-size: 14px;
  padding: 1rem;
  background: var(--pipe-ink);
  color: #e2e8f0;
  border-radius: 2px;
  white-space: pre-wrap;
  word-break: break-all;
  line-height: 1.6;
  border: none;
}