.conv-main {
  padding-top: 8px;
}

.conv-header {
  margin-bottom: 24px;
}

.conv-eyebrow {
  margin: 0 0 8px;
  color: var(--muted);
  font: 450 11px/1.4 var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.conv-header h1 {
  margin: 0 0 8px;
  font: 400 clamp(28px, 4.5vw, 40px)/1.16 var(--serif);
  letter-spacing: -0.028em;
  color: var(--ink);
}

.conv-subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
}

.controls-panel {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-raised);
  padding: 16px;
  margin-bottom: 18px;
}

.presets-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.preset-group {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  width: 100%;
}

.preset-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 3px;
  min-height: 50px;
  padding: 9px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--paper);
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}

.preset-btn span {
  font: 550 13px/1.2 var(--sans);
}

.preset-btn small {
  color: var(--muted);
  font: 400 11px/1.3 var(--mono);
}

.preset-btn:hover {
  border-color: var(--accent);
}

.preset-btn[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
}

.preset-btn[aria-pressed="true"] small {
  color: var(--accent-ink);
  opacity: 0.86;
}

.rules-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px 16px;
  padding-top: 14px;
}

.rule-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.rule-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  font: 500 12px/1.3 var(--sans);
  color: var(--ink);
}

.rule-label small {
  color: var(--muted);
  font: 400 11px/1 var(--mono);
}

.seg {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
  gap: 2px;
}

.seg button {
  min-height: 36px;
  padding: 0 6px;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--muted);
  font: 500 12px/1 var(--sans);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.seg button:hover {
  color: var(--ink);
}

.seg button[aria-pressed="true"] {
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

.rules-extra {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.variant-check {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 36px;
  font-size: 13px;
  color: var(--muted);
  cursor: pointer;
}

.variant-check input {
  width: 17px;
  height: 17px;
  accent-color: var(--accent);
  cursor: pointer;
  flex-shrink: 0;
}

.variant-check code {
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink);
  font: 400 12px var(--mono);
}

.panes {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 44px minmax(0, 1fr);
  gap: 12px;
}

.swap-btn {
  display: grid;
  place-items: center;
  align-self: start;
  margin-top: 4px;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--surface-raised);
  color: var(--ink);
  cursor: pointer;
}

.swap-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.swap-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.pane {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--surface-raised);
  overflow: hidden;
}

.pane-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 48px;
  padding: 6px 10px 6px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.pane-head label {
  font: 550 13px/1.2 var(--sans);
  color: var(--ink);
  white-space: nowrap;
}

.jp-tag {
  margin-left: 6px;
  color: var(--muted);
  font: 400 11px/1 var(--mono);
}

.pane-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
}

.pane-btn {
  min-height: 36px;
  padding: 0 10px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font: 450 12px/1 var(--mono);
  cursor: pointer;
  transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}

.pane-btn:hover {
  color: var(--ink);
  background: var(--paper);
  border-color: var(--line);
}

.pane-btn[aria-pressed="true"] {
  color: var(--accent);
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 40%, transparent);
}

.pane-btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
  padding: 0 14px;
}

.pane-btn-primary:hover {
  background: var(--accent);
  color: var(--accent-ink);
  opacity: 0.9;
}

.pane-btn:disabled {
  opacity: 0.65;
  cursor: default;
}

.pane-textarea,
.pane-inspect {
  width: 100%;
  min-height: 290px;
  padding: 16px;
  border: 0;
  background: var(--surface-raised);
  color: var(--ink);
  font: 400 16px/1.7 var(--sans);
  resize: vertical;
  overflow-wrap: anywhere;
}

.pane-textarea:focus {
  outline: none;
}

.pane:focus-within {
  border-color: var(--accent);
}

.pane-textarea::placeholder {
  color: var(--muted);
  opacity: 0.7;
}

.pane-inspect {
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
  cursor: text;
}

.pane-inspect[hidden],
.pane-textarea[hidden] {
  display: none;
}

.inspect-empty {
  color: var(--muted);
  opacity: 0.7;
}

.tok {
  border-radius: 3px;
  padding: 0 1px;
  color: inherit;
}

.tok-full-ascii {
  background: rgba(180, 120, 32, 0.18);
  border-bottom: 2px solid #b47820;
}

.tok-full-space {
  background: rgba(54, 74, 50, 0.14);
  border: 1px dashed var(--accent);
  padding: 0 2px;
}

.tok-half-kana {
  background: rgba(168, 72, 46, 0.16);
  border-bottom: 2px dotted #a8482e;
}

:root[data-theme="dark"] .tok-full-ascii {
  background: rgba(230, 176, 86, 0.20);
  border-bottom-color: #e6b056;
}

:root[data-theme="dark"] .tok-half-kana {
  background: rgba(226, 134, 108, 0.22);
  border-bottom-color: #e2866c;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .tok-full-ascii {
    background: rgba(230, 176, 86, 0.20);
    border-bottom-color: #e6b056;
  }

  :root:not([data-theme="light"]) .tok-half-kana {
    background: rgba(226, 134, 108, 0.22);
    border-bottom-color: #e2866c;
  }
}

.pane-foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 16px;
  padding: 9px 14px;
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.stats-text {
  color: var(--muted);
  font: 400 11px/1.4 var(--mono);
  font-variant-numeric: tabular-nums;
}

.diagnostic-bar {
  margin-top: 14px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 16px;
  color: var(--muted);
  font: 400 12px/1.5 var(--mono);
}

.inspect-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 11px;
}

.inspect-legend[hidden] {
  display: none;
}

.leg-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

@media (max-width: 820px) {
  .rules-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .panes {
    grid-template-columns: 1fr;
  }

  .swap-btn {
    justify-self: center;
    margin-top: 0;
  }

  .swap-btn svg {
    transform: rotate(90deg);
  }

  .pane-textarea,
  .pane-inspect {
    min-height: 210px;
  }
}

@media (max-width: 560px) {
  .preset-group {
    grid-template-columns: 1fr;
  }

  .rules-grid {
    grid-template-columns: 1fr;
  }
}

.conversion-note {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.advanced-rules summary {
  cursor: pointer;
  padding: 8px 0;
}

.advanced-rules > .preset-btn {
  margin-top: 8px;
}