.b64-wrap { margin-bottom: 2.5rem; }

.b64-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.b64-mode-btn {
  background: none;
  border: none;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  cursor: pointer;
  padding: 0;
  transition: color 0.15s;
}
.b64-mode-btn.active { color: var(--accent); }
.b64-mode-btn:hover  { color: var(--text); }

.b64-sep {
  font-size: 10px;
  color: var(--muted2);
}

.b64-encoding-wrap {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.b64-enc-label {
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted2);
}

.b64-enc-select {
  background: var(--bg2);
  border: 0.5px solid var(--border);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--muted);
  padding: 0.2rem 0.4rem;
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s, color 0.15s;
}
.b64-enc-select:hover { border-color: var(--border-hover); color: var(--text); }

.b64-panels {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0.75rem;
  align-items: start;
}

.b64-arrow {
  font-size: 18px;
  color: var(--muted2);
  padding-top: 2rem;
  text-align: center;
}

.b64-panel-label {
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted2);
  margin-bottom: 0.4rem;
}

.b64-textarea {
  width: 100%;
  min-height: 160px;
  background: var(--bg2);
  border: 0.5px solid var(--border);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text);
  padding: 0.75rem;
  resize: vertical;
  outline: none;
  transition: border-color 0.15s;
  line-height: 1.6;
}
.b64-textarea:focus { border-color: var(--border-hover); }
.b64-textarea[readonly] { color: var(--muted); }

.b64-panel-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.4rem;
}

.b64-footer-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.b64-counter {
  font-size: 9px;
  letter-spacing: 0.08em;
  color: var(--muted2);
}

.b64-action-btn {
  background: none;
  border: none;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  cursor: pointer;
  padding: 0;
  transition: color 0.15s;
}
.b64-action-btn:hover { color: var(--accent); }

.b64-status {
  font-size: 9px;
  letter-spacing: 0.08em;
  color: var(--muted2);
}
.b64-status.error { color: var(--wip); }

@media (max-width: 540px) {
  .b64-panels {
    grid-template-columns: 1fr;
  }
  .b64-arrow {
    padding-top: 0;
    transform: rotate(90deg);
    justify-self: center;
  }
}