:root {
  --bg-main: #17171c;
  --bg-panel: #23222a;
  --bg-panel-hover: #2e2e38;
  --bg-panel-strong: #2a2840;
  --bg-active: #3d39ac;

  --border-main: #444454;
  --border-soft: #555568;
  --border-accent: #6f68d8;

  --accent: #8b7dff;
  --accent-soft: #b6aeff;

  --text-main: #f0f0f0;
  --text-sub: #aaaaaa;
  --text-muted: #cccccc;

  --ok: #9aa0a6;
  --warn: #f5c15d;
  --error: #ff7b7b;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: var(--bg-main);
  color: var(--text-main);
}

.app {
  max-width: 900px;
  margin: 40px auto;
  padding: 24px;
}

h1 {
  margin-bottom: 8px;
}

.author {
  font-size: 14px;
  color: var(--text-sub);
  margin-left: 8px;
}

.language-switch {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.lang-button {
  padding: 6px 12px;
  border: 1px solid var(--border-soft);
  border-radius: 6px;
  background: var(--bg-panel);
  color: #ddd;
  cursor: pointer;
}

.lang-button:hover {
  background: var(--bg-panel-hover);
}

.lang-button.active {
  background: var(--bg-active);
  color: #fff;
  border-color: var(--accent);
}

.drop-area {
  margin-top: 24px;
  padding: 32px;
  border: 2px dashed var(--border-accent);
  border-radius: 12px;
  background: var(--bg-panel);
}

.drop-area.drag-over {
  border-color: var(--accent);
  background: var(--bg-panel-strong);
}

.file-picker {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 100%;
}

.file-button {
  padding: 6px 12px;
  border-radius: 4px;
  background: var(--bg-active);
  color: white;
  cursor: pointer;
  white-space: nowrap;
}

.file-button:hover {
  background: var(--accent);
}

.file-input {
  display: none;
}

.file-name {
  flex: 1;
  min-width: 0;
  overflow-wrap: anywhere;
  color: var(--text-main);
}

.tabs {
  margin-top: 24px;
}

.tab-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border-main);
  margin-bottom: 16px;
}

.tab-button {
  padding: 10px 14px;
  border: 1px solid var(--border-main);
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  background: var(--bg-panel);
  color: #ddd;
  cursor: pointer;
}

.tab-button:hover {
  background: var(--bg-panel-hover);
}

.tab-button.active {
  background: var(--bg-active);
  color: #fff;
  border-color: var(--accent);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.options {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.doc-btn {
  padding: 8px 12px;
  border: 1px solid var(--border-accent);
  border-radius: 6px;
  background: var(--bg-panel-strong);
  color: #eee;
  font-size: 14px;
  cursor: pointer;
}

.doc-btn:hover {
  background: #35324a;
  border-color: var(--accent);
}

.placeholder,
#output {
  margin-top: 16px;
  padding: 16px;
  background: #111116;
  border: 1px solid #2b2940;
  border-radius: 8px;
  color: var(--text-muted);
  white-space: pre-wrap;
  font-family: Consolas, "Courier New", monospace;
  font-size: 13px;
}

.ok {
  color: var(--ok);
}

.warn {
  color: var(--warn);
}

.error {
  color: var(--error);
}

.diff-name {
  color: var(--accent-soft);
}

/** 共通処理 */
.transform-actions {
  margin-top: 18px;
  padding: 16px;

  border: 1px solid var(--border-main);
  border-radius: 10px;

  background: var(--bg-panel);

  display: flex;
  align-items: flex-end;
  gap: 16px;
  flex-wrap: wrap;
}

.suffix-option {
  display: flex;
  flex-direction: column;
  gap: 6px;

  min-width: 220px;

  color: var(--text-main);
  font-size: 14px;
}

.transform-actions .doc-btn {
  min-height: 36px;
}

/** inputエリア */
.text-input {
  min-width: 180px;
  padding: 8px 10px;

  border: 1px solid var(--border-accent);
  border-radius: 6px;

  background: #111116;
  color: var(--text-main);

  font-size: 14px;
}

.text-input::placeholder {
  color: #8f8aa8;
}

.text-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(139, 125, 255, 0.25);
}

.text-input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.text-input,
.text-input:focus,
.text-input:active {
  background: #111116;
  color: var(--text-main);
}

.text-input:-webkit-autofill,
.text-input:-webkit-autofill:hover,
.text-input:-webkit-autofill:focus,
.text-input:-webkit-autofill:active {
  -webkit-box-shadow: 0 0 0 1000px #111116 inset !important;
  -webkit-text-fill-color: var(--text-main) !important;

  transition: background-color 9999s ease-in-out 0s;
}

/** detach */
.transform-panel {
  padding: 16px;
  border: 1px solid var(--border-main);
  border-radius: 10px;
  background: var(--bg-panel);
}

.transform-panel h2 {
  margin: 0 0 12px;
  font-size: 16px;
  color: var(--accent-soft);
}

.option-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(180px, 1fr));
  gap: 14px;
}

.option-grid label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--text-main);
  font-size: 14px;
}

.select-input {
  padding: 8px 10px;
  border: 1px solid var(--border-accent);
  border-radius: 6px;
  background: #111116;
  color: var(--text-main);
  font-size: 14px;
}

.select-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(139, 125, 255, 0.25);
}

.note-subtext {
  margin-top: 12px;
  color: var(--text-sub);
  font-size: 13px;
  line-height: 1.6;
}

.option-grid-wide {
  grid-column: 1 / -1;
}

.textarea-input {
  min-height: 90px;
  padding: 8px 10px;

  border: 1px solid var(--border-accent);
  border-radius: 6px;

  background: #111116;
  color: var(--text-main);

  font-family: Consolas, "Courier New", monospace;
  font-size: 14px;

  resize: vertical;
}

.textarea-input::placeholder {
  color: #8f8aa8;
}

.textarea-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(139, 125, 255, 0.25);
}

.textarea-input,
.textarea-input:focus,
.textarea-input:active {
  background: #111116;
  color: var(--text-main);
}

.suffix-option {
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--text-main);
  font-size: 14px;
}

.wide-input {
  width: 100%;
  box-sizing: border-box;
}

.detach-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(220px, 1fr));
  gap: 18px;
}

.detach-column {
  padding: 12px;
  border: 1px solid var(--border-main);
  border-radius: 8px;
  background: #1b1a22;
}

.detach-column h3 {
  margin: 0 0 12px;
  color: var(--accent-soft);
  font-size: 15px;
}

.detach-column label {
  margin-bottom: 10px;
}

.text-input::placeholder {
  color: #7f7aa8;
}

.select-input {
  color: var(--text-main);
}

.detach-column .text-input,
.detach-column .select-input {
  width: 100%;
  box-sizing: border-box;
  min-width: 0;
}

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

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

.doc-btn:disabled:hover {
  background: var(--bg-panel-strong);
  border-color: var(--border-accent);
}

.preview-log {
  margin-top: 18px;
  padding: 16px;

  border: 1px solid var(--border-main);
  border-radius: 10px;

  background: var(--bg-panel);
}

.preview-log h2 {
  margin: 0 0 12px;
  font-size: 16px;
  color: var(--accent-soft);
}

.preview-log #output {
  margin-top: 0;
}

/** 上部ヘッダー */
.top-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.header-links {
  display: flex;
  align-items: center;
  gap: 12px;

  margin-top: 6px;
}

.header-links a,
.header-link-button {
  color: var(--accent-soft);

  background: none;
  border: none;

  font-size: 13px;
  text-decoration: none;

  cursor: pointer;
}

.header-links a:hover,
.header-link-button:hover {
  color: var(--accent-main);
  text-decoration: underline;
}

/* modal */

.modal.hidden {
  display: none;
}

.modal {
  position: fixed;
  inset: 0;

  background: rgba(0, 0, 0, 0.6);

  display: flex;
  justify-content: center;
  align-items: center;

  z-index: 9999;
}

.modal-content {
  width: min(720px, 92vw);

  max-height: 80vh;
  overflow-y: auto;

  background: var(--bg-panel);
  border: 1px solid var(--border-main);
  border-radius: 12px;

  padding: 18px;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;

  margin-bottom: 16px;
}

.modal-close-button {
  border: none;
  background: none;

  color: var(--text-main);

  font-size: 22px;
  cursor: pointer;
}

.update-entry {
  margin-bottom: 20px;
}

.update-version {
  color: var(--accent-soft);
  font-weight: bold;

  margin-bottom: 8px;
}

.top-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.top-links a,
.top-links .doc-btn {
  padding: 6px 10px;
  border: 1px solid var(--border-soft);
  border-radius: 6px;
  background: var(--bg-panel);
  color: var(--text-main);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.2;
  cursor: pointer;
}

.top-links a:hover,
.top-links .doc-btn:hover {
  background: var(--bg-panel-hover);
  text-decoration: none;
}

.header-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}

.header-right .language-switch {
  justify-content: flex-end;
  margin-top: 0;
}

/** 警告色 */
.preview-warning {
  color: var(--warn);
}

.preview-summary {
  color: var(--accent-soft);
}

.preview-error {
  color: var(--error);
}