@charset "UTF-8";
:root {
  --primary: #0D68FF;
  --bg: #f8fafc;
  --danger: #ef4444;
  --warning: #f97316;
  --dark: #1e293b;
  --border: #e2e8f0;
  --diff-add-bg: #e6ffec;
  --diff-del-bg: #ffeef0; }

.container {
  box-sizing: border-box;
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  background: #fff;
  padding: 2em;
  border-radius: 1em;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08); }

.desc_area {
  max-width: 1200px; }

/* 入力エリア */
.diff-inputs {
  display: flex;
  gap: 15px;
  margin-bottom: 20px; }

.input-group {
  flex: 1; }

label {
  display: block;
  font-weight: bold;
  margin-bottom: 0.5em;
  font-size: 90%; }

textarea {
  width: 100%;
  height: 200px;
  padding: 1em;
  border: 1px solid var(--border);
  border-radius: 0.5em;
  font-family: monospace;
  font-size: 83%;
  resize: vertical;
  box-sizing: border-box; }

.btn-group {
  display: flex;
  gap: 0.5em;
  margin-bottom: 2em; }

.btn {
  padding: 1em 2em;
  border-radius: 0.5em;
  font-weight: bold;
  cursor: pointer;
  border: none;
  color: #fff;
  font-size: 90%; }

.btn-primary {
  background: var(--primary); }

.btn-clear {
  background: #64748b; }

/* 比較ビューアー本体 */
.diff-viewer {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 0.5em;
  overflow: hidden;
  font-family: monospace;
  font-size: 83%;
  line-height: 1.6;
  display: none; }

.diff-pane {
  flex: 1;
  overflow-x: auto;
  background: #fff; }
  .diff-pane:first-child {
    border-right: 1px solid var(--border); }

.pane-title {
  background: #f1f5f9;
  padding: 0.5em 1em;
  font-size: 75%;
  font-weight: bold;
  color: #64748b;
  border-bottom: 1px solid var(--border); }

/* 差分行のレイアウト */
.diff-row {
  display: flex;
  min-height: 1.6em;
  border-bottom: 1px solid #f1f5f9; }

.line-num {
  width: 3em;
  padding: 0 0.5em;
  text-align: right;
  color: #cbd5e1;
  background: #f8fafc;
  border-right: 1px solid #f1f5f9;
  user-select: none;
  flex-shrink: 0; }

.line-txt {
  flex: 1;
  padding: 0 1em;
  white-space: pre-wrap;
  word-break: break-all;
  display: flex; }

/* 記号（+ / -）の設定 */
.row-del .line-txt::before,
.row-add .line-txt::before {
  display: inline-block;
  width: 1.2em;
  flex-shrink: 0;
  font-weight: bold; }

.row-del {
  background: var(--diff-del-bg); }

.row-del .line-txt::before {
  content: "-";
  color: var(--danger); }

.row-add {
  background: var(--diff-add-bg); }

.row-add .line-txt::before {
  content: "+";
  color: #16a34a; }

.row-empty {
  background: #fdfdfd; }

.no-diff {
  padding: 4em;
  text-align: center;
  color: #64748b;
  background: #f8fafc;
  border-radius: 0.5em;
  border: 1px dashed var(--border);
  display: none; }

.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999; }

.toast-bnr {
  background: var(--dark);
  color: #fff;
  padding: 1em 2em;
  border-radius: 0.5em;
  margin-bottom: 1em;
  border-left: 5px solid var(--primary);
  font-size: 83%; }

@media screen and (max-width: 480px) {
  /* 480px以下 */
  .diff-inputs {
    flex-wrap: wrap; }

  .input-group {
    flex: none;
    width: 100%; }

  .btn-primary {
    flex: 2; }

  .btn-clear {
    flex: 1; }

  .diff-viewer {
    flex-wrap: wrap; }

  .diff-pane {
    border-top: 1px solid var(--border);
    flex: none;
    width: 100%; }
    .diff-pane:first-child {
      border-top: none; }

  .no-diff {
    padding: 2em; } }