/* components.css — ボタン、スライダ、ドロップゾーン等 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 32px;
  padding: 0 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-strong);
  background: var(--bg-elev);
  color: var(--fg);
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.btn:hover:not(:disabled) {
  background: var(--bg-sunken);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn--primary {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
}

.btn--primary:hover:not(:disabled) {
  background: color-mix(in srgb, var(--accent) 88%, black);
}

.btn--icon {
  width: 32px;
  padding: 0;
}

.btn--ghost {
  border-color: transparent;
  background: transparent;
  height: 26px;
  width: 26px;
  border-radius: var(--radius-sm);
  font-size: 13px;
}

.btn--ghost:hover:not(:disabled) {
  background: color-mix(in srgb, var(--fg) 8%, transparent);
}

.btn--ghost[aria-pressed='true'] {
  background: var(--accent);
  color: var(--accent-fg);
}

.select {
  height: 32px;
  padding: 0 10px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-strong);
  background: var(--bg-elev);
  color: var(--fg);
  cursor: pointer;
}

/* ヘッダーのライブトレース・トグル（チェックボックス + ラベル） */
.toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 10px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--bg-elev);
  cursor: pointer;
  font-size: 12px;
  user-select: none;
}

.toggle input[type='checkbox'] {
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.toggle:has(input:checked) {
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border-color: var(--accent);
  color: var(--accent);
}

/* 出力フォーマット選択 + 保存ボタン */
.export-group {
  display: inline-flex;
  align-items: stretch;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--bg-elev);
  overflow: hidden;
}

.export-group .select {
  height: 30px;
  border: none;
  background: transparent;
  border-radius: 0;
  border-right: 1px solid var(--border);
  padding: 0 6px 0 10px;
}

.export-group .btn {
  height: 30px;
  border: none;
  border-radius: 0;
}

.panel__section {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--border);
}

.panel__section:last-child {
  border-bottom: none;
}

.panel__title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--fg-muted);
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* slider control */
.field {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 8px;
  align-items: center;
}

.field.is-disabled {
  opacity: 0.45;
}

.field--toggle {
  grid-template-columns: auto 1fr;
}

.field__check {
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.palette {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.palette__swatch {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  border: 1px solid color-mix(in srgb, var(--fg) 18%, transparent);
  cursor: pointer;
  transition: transform var(--transition-fast);
  overflow: hidden;
}

.palette__swatch:hover {
  transform: scale(1.08);
}

.palette__picker {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
  background: none;
  padding: 0;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}

.palette__reset {
  position: absolute;
  top: -4px;
  right: -4px;
  z-index: 2;
  width: 14px;
  height: 14px;
  border: 1px solid var(--border-strong);
  background: var(--bg-elev);
  color: var(--fg-muted);
  border-radius: 50%;
  font-size: 9px;
  line-height: 1;
  cursor: pointer;
  padding: 0;
}

/* ヘルプダイアログ */
.help {
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--bg-elev);
  color: var(--fg);
  padding: 0;
  max-width: 520px;
  width: min(92vw, 520px);
  box-shadow: var(--shadow-md);
}

.help::backdrop {
  background: rgba(0, 0, 0, 0.4);
}

.help__inner {
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.help__title {
  font-size: 15px;
}

.help__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 6px;
  font-size: 13px;
}

.help__list li {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.help kbd {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--bg-sunken);
  border: 1px solid var(--border);
}

.help__note {
  font-size: 12px;
  color: var(--fg-muted);
}

.help menu {
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: flex-end;
}

.field__label {
  font-size: 12px;
  color: var(--fg-muted);
}

.field__value {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-muted);
  min-width: 3ch;
  text-align: right;
}

.field__input {
  grid-column: 1 / -1;
  width: 100%;
}

input[type='range'] {
  accent-color: var(--accent);
}

/* radio / chip group */
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chip {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--bg-elev);
  color: var(--fg);
  cursor: pointer;
  font-size: 12px;
}

.chip[aria-pressed='true'] {
  background: var(--accent);
  color: var(--accent-fg);
  border-color: var(--accent);
}

/* drop zone — viewport の上に被せる */
.dropzone {
  position: absolute;
  inset: 16px;
  z-index: 3;
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--bg-elev) 70%, transparent);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: border-color var(--transition-med), background var(--transition-med);
}

.dropzone:hover,
.dropzone:focus-visible {
  border-color: var(--accent);
}

.dropzone.is-active {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}

.dropzone__inner {
  text-align: center;
  pointer-events: none;
}

.dropzone__title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.dropzone__hint {
  font-size: 12px;
  color: var(--fg-muted);
}

/* canvas / svg host — viewport__content の transform で拡縮するため、ネイティブサイズで描画する */
#source-canvas {
  display: block;
}

.svg-host {
  display: block;
}

.svg-host > svg {
  display: block;
}

.placeholder {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: grid;
  place-items: center;
  color: var(--fg-muted);
  font-size: 13px;
  pointer-events: none;
}

/* status / progress */
.status {
  font-variant-numeric: tabular-nums;
}

.progress {
  width: 180px;
  height: 6px;
  appearance: none;
  border: none;
  border-radius: 999px;
  overflow: hidden;
  background: var(--bg-sunken);
}

.progress::-webkit-progress-bar {
  background: var(--bg-sunken);
}

.progress::-webkit-progress-value {
  background: var(--accent);
  transition: width var(--transition-fast);
}

.progress::-moz-progress-bar {
  background: var(--accent);
}

.footnote {
  font-size: 11px;
  opacity: 0.85;
}

/* preview meta */
.preview__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-muted);
}

/* Before/After スライダ比較 */
.compare {
  --split: 50;
  position: absolute;
  inset: 0;
  z-index: 4;
  display: grid;
  place-items: center;
  user-select: none;
  background: var(--bg-sunken);
}

.compare__before,
.compare__after {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(95%, 100%);
  max-height: 95%;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
}

.compare__before {
  clip-path: inset(0 calc(100% - var(--split) * 1%) 0 0);
  background-color: var(--bg-elev);
}

.compare__after {
  clip-path: inset(0 0 0 calc(var(--split) * 1%));
  display: grid;
  place-items: center;
}

.compare__after > svg {
  display: block;
  max-width: 100%;
  max-height: 100%;
}

.compare__handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(var(--split) * 1%);
  width: 2px;
  background: var(--accent);
  cursor: ew-resize;
  transform: translateX(-50%);
  z-index: 2;
}

.compare__handle::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 24px;
  height: 24px;
  background: var(--accent);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: var(--shadow-md);
}

.compare__handle::after {
  content: '⇄';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--accent-fg);
  font-size: 11px;
  pointer-events: none;
}