:root {
  --light-color: #444;
  --dark-color: #000;
  --icon-color: #65615f;
  --w: 36rem;        /* プレビューボタン幅 */
  --h: 11rem;        /* プレビューボタン高さ */
  --radius: 3.2rem;  /* 角丸 */
  --rim: 0.8rem;     /* リム（ベゼル）太さ＝金属面の幅 */
  --circle: 16rem;   /* 丸形の直径 */
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html { font-size: 62.5%; }

body {
  min-height: 100vh;
  background: #1d1d1d;
  display: flex;
  flex-direction: column;
  padding: 4rem 2rem;
  font-family: sans-serif;
}

/* 見出し（コンテンツ幅・中央寄せ） */
.lm-head {
  width: 100%;
  max-width: 112rem;
  margin: 0 auto 3rem;
  text-align: center;
}

/* h1と言語ボタンを同じ行に：空き｜h1中央｜ボタン右（サイドバー右端と一致） */
.lm-head-top {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  column-gap: 1.2rem;
}

.lm-head-top h1 {
  grid-column: 2;
}

.lm-head-top .lang-switch {
  grid-column: 3;
  justify-self: end;
}

/* 言語切り替え（h1と同じ行・コンテンツ右端） */
.lang-switch {
  margin: 0;
}

.lang-switch a {
  display: inline-block;
  color: #cfe0ef;
  text-decoration: none;
  font-size: 1.6rem;
  background: #2b3540;
  border: 0.1rem solid #3a4856;
  border-radius: 0.8rem;
  padding: 0.5rem 1.4rem;
  transition: background 0.12s ease;
}

.lang-switch a:hover {
  background: #34414f;
}

.lm-head h1 {
  color: #e8e4df;
  font-size: 2.8rem;
  font-weight: 700;
  line-height: 1.35;
}

.lm-head .accent {
  color: #b9c4cf;
}

.lm-head p {
  color: #9a9591;
  font-size: 1.6rem;
  line-height: 1.8;
  max-width: 70rem;
  margin: 1.2rem auto 0;
}

/* アプリ本体：左＝プレビュー＋コード / 右＝サイドバー */
.lm-app {
  width: 100%;
  max-width: 112rem;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 34rem;
  gap: 2.8rem;
  align-items: start;
}

.lm-main {
  display: flex;
  flex-direction: column;
  gap: 2.4rem;
  min-width: 0;
}

/* 大きなプレビュー1つ */
.preview {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 30rem;
  padding: 5rem 3rem;
  background: #161616;
  border: 0.1rem solid #2a2a2a;
  border-radius: 1.6rem;
}

/* プレビュー背景：ライト切替（#F5F5F5） */
.preview[data-bg="light"] {
  background: #f5f5f5;
  border-color: #e2e2e2;
}

/* プレビュー背景トグル（右上） */
.bg-toggle {
  position: absolute;
  top: 1.2rem;
  right: 1.2rem;
  display: flex;
  gap: 0.4rem;
}

.bg-btn {
  background: rgba(0, 0, 0, 0.35);
  color: #e0dcd7;
  border: 0.1rem solid rgba(255, 255, 255, 0.18);
  border-radius: 0.7rem;
  padding: 0.5rem 1.1rem;
  font-size: 1.6rem;
  cursor: pointer;
  transition: background 0.12s ease, color 0.12s ease;
}

.bg-btn.is-active {
  background: #b9c4cf;
  border-color: #b9c4cf;
  color: #141414;
  font-weight: 700;
}

.preview[data-bg="light"] .bg-btn {
  background: rgba(255, 255, 255, 0.7);
  color: #444;
  border-color: rgba(0, 0, 0, 0.15);
}

.preview[data-bg="light"] .bg-btn.is-active {
  background: #2b3540;
  color: #f5f5f5;
  border-color: #2b3540;
}

.lm-sidebar {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  position: sticky;
  top: 2rem;
}

.panel {
  background: #161616;
  border: 0.1rem solid #2a2a2a;
  border-radius: 1.4rem;
  padding: 1.8rem;
}

.panel-title {
  color: #e8e4df;
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.panel-note {
  margin-top: 0.4rem;
  margin-bottom: 1.4rem;
  color: #8f8a86;
  font-size: 1.5rem;
  line-height: 1.6;
}

/* テンプレート（プリセット）ボタン群 */
.tpl-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
}

.tpl-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  padding: 1rem 0.4rem;
  background: #232323;
  border: 0.1rem solid #343434;
  border-radius: 1rem;
  cursor: pointer;
  transition: background 0.12s ease, border-color 0.12s ease;
}

.tpl-btn:hover {
  background: #2c2c2c;
}

.tpl-btn.is-active {
  background: #2b3540;
  border-color: #b9c4cf;
}

.tpl-id {
  color: #d8d3ce;
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1.1;
}

.tpl-btn.is-active .tpl-id {
  color: #cfe0ef;
}

.tpl-meta {
  color: #8f8a86;
  font-size: 1.6rem;
  font-family: monospace;
  line-height: 1.1;
}

/* rep / angle / speed スライダー */
.ctrl {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  width: 100%;
}

.ctrl-row {
  display: grid;
  grid-template-columns: 5.5rem 1fr 4.5rem;
  align-items: center;
  gap: 0.8rem;
}

.ctrl-name {
  color: #8f8a86;
  font-size: 1.6rem;
  font-family: monospace;
}

.ctrl-val {
  color: #cfcac5;
  font-size: 1.6rem;
  font-family: monospace;
  text-align: right;
}

.sld {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 0.4rem;
  border-radius: 0.4rem;
  background: #3a3a3a;
  cursor: pointer;
}

.sld::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 50%;
  background: #b9c4cf;
  border: none;
  cursor: pointer;
}

.sld::-moz-range-thumb {
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 50%;
  background: #b9c4cf;
  border: none;
  cursor: pointer;
}

/* 色相スライダーはトラックを虹色に（色変更のUIヒント） */
.sld-hue {
  background: linear-gradient(
    to right,
    hsl(0, 60%, 60%), hsl(60, 60%, 60%), hsl(120, 60%, 60%),
    hsl(180, 60%, 60%), hsl(240, 60%, 60%), hsl(300, 60%, 60%), hsl(360, 60%, 60%)
  );
}

/* メタルボタン本体（全面描画のシェーダーcanvasを角丸でクリップ） */
.lm {
  position: relative;
  width: var(--w);
  height: var(--h);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

/* シェーダー描画canvas（中央の暗い面より下＝縁のリムだけ見せる） */
.lm canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* 丸形（円） */
.lm[data-shape="circle"] {
  width: var(--circle);
  height: var(--circle);
  border-radius: 50%;
}

.lm[data-shape="circle"]::before {
  width: calc(var(--circle) - var(--rim) * 2);
  height: calc(var(--circle) - var(--rim) * 2);
  border-radius: 50%;
}

.lm[data-shape="circle"] .outline {
  border-radius: 50%;
}

.lm[data-shape="circle"] .label {
  font-size: 2rem;
  letter-spacing: 0.08em;
  text-indent: 0.08em;
}

/* 形セレクタ（長方形 / 丸） */
.shape-row {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 1.6rem;
}

.shape-btn {
  flex: 1;
  background: #232323;
  color: #b6b1ac;
  border: 0.1rem solid #343434;
  border-radius: 0.9rem;
  padding: 0.9rem;
  font-size: 1.6rem;
  cursor: pointer;
  transition: background 0.12s ease, border-color 0.12s ease, color 0.12s ease;
}

.shape-btn:hover {
  background: #2c2c2c;
}

.shape-btn.is-active {
  background: #2b3540;
  border-color: #b9c4cf;
  color: #cfe0ef;
  font-weight: 700;
}

/* クリック時：少し沈み込む */
.lm:active {
  transform: translateY(0.2rem) scale(0.98);
  box-shadow: 0 0.3rem 0.8rem rgba(0, 0, 0, 0.5);
}

/* 中央を覆う暗い面。メタルを“縁のリム”だけ見せる */
.lm::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: calc(var(--w) - var(--rim) * 2);
  height: calc(var(--h) - var(--rim) * 2);
  background: linear-gradient(var(--light-color), var(--dark-color));
  border-radius: calc(var(--radius) - var(--rim));
  box-shadow: inset 0 0.2rem 0.2rem 0.2rem rgba(255, 255, 255, 0.3);
  z-index: 1;
}

.outline {
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: var(--radius);
  z-index: 2;
}

/* 極細のカラーアウトライン */
.outline::before {
  content: "";
  position: absolute;
  inset: 0;
  padding: 0.025rem;
  border-radius: inherit;
  background: conic-gradient(from 180deg, blue, purple, red, purple, blue);
  filter: grayscale(1);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask-composite: exclude;
}

.label {
  font-size: 2.6rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-indent: 0.25em;
  color: var(--icon-color);
}

/* ライトテーマ：ボタン面を明るく・テキストを濃く反転 */
.lm[data-theme="light"] {
  --light-color: #fcfcfc;
  --dark-color: #d2d2d2;
}

.lm[data-theme="light"]::before {
  box-shadow: inset 0 0.2rem 0.2rem 0.2rem rgba(0, 0, 0, 0.12);
}

.lm[data-theme="light"] .label {
  color: #333333;
}

/* 生成コードパネル（プレビューの下・メイン列いっぱい） */
.code-panel {
  width: 100%;
  background: #141414;
  border: 0.1rem solid #2c2c2c;
  border-radius: 1.2rem;
  overflow: hidden;
}

.code-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.2rem;
  padding: 1.4rem 1.6rem;
  background: #1b1b1b;
  border-bottom: 0.1rem solid #2c2c2c;
}

.code-title {
  color: #e8e4df;
  font-size: 1.7rem;
  font-weight: 700;
}

.code-meta {
  margin-left: 0.6rem;
  color: #8f8a86;
  font-size: 1.5rem;
  font-weight: 400;
  font-family: monospace;
}

.code-tabs {
  display: inline-flex;
  gap: 0.6rem;
  margin-left: auto;
}

.tab {
  background: #262626;
  color: #b6b1ac;
  border: 0.1rem solid #353535;
  border-radius: 0.8rem;
  padding: 0.7rem 1.2rem;
  font-size: 1.5rem;
  cursor: pointer;
  transition: background 0.12s ease, color 0.12s ease;
}

.tab:hover {
  background: #2f2f2f;
}

.tab.is-active {
  background: #b9c4cf;
  color: #141414;
  border-color: #b9c4cf;
  font-weight: 700;
}

.copy-btn {
  background: #2b3540;
  color: #cfe0ef;
  border: 0.1rem solid #3a4856;
  border-radius: 0.8rem;
  padding: 0.7rem 1.4rem;
  font-size: 1.5rem;
  cursor: pointer;
  transition: background 0.12s ease;
}

.copy-btn:hover {
  background: #34414f;
}

.copy-btn.is-copied {
  background: #2f5d3a;
  border-color: #2f5d3a;
  color: #d6f5dd;
}

.code-block {
  margin: 0;
  padding: 1.8rem;
  overflow-x: auto;
  max-height: 44rem;
}

.code-block code {
  display: block;
  color: #d6d1cc;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 1.6rem;
  line-height: 1.6;
  white-space: pre;
  tab-size: 2;
}

/* 広告（ツール系ページ規格：固定サイズ・CLS防止） */
.ad-wrap {
  min-height: 90px;
}

.ad-banner {
  width: 728px;
  height: 90px;
}

@media screen and (max-width: 727px) {
  .ad-wrap {
    min-height: 100px;
  }
  .ad-banner {
    width: 320px;
    height: 100px;
  }
}

.lm-foot {
  margin: 4rem auto 0;
  text-align: center;
  color: #6f6b68;
  font-size: 1.6rem;
  line-height: 2;
}

.lm-foot a {
  color: #9aa6b2;
  text-decoration: none;
}

.lm-foot a:hover {
  text-decoration: underline;
}

.lm-foot-links {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.6rem;
  margin-left: 1.6rem;
}

/* 狭い画面：h1と言語ボタンを同じ行に保てないので縦積み（ボタンを上・右寄せ） */
@media (max-width: 860px) {
  .lm-head-top {
    grid-template-columns: 1fr;
  }
  .lm-head-top h1 {
    grid-column: 1;
    grid-row: 2;
  }
  .lm-head-top .lang-switch {
    grid-column: 1;
    grid-row: 1;
    margin-bottom: 1.2rem;
  }
}

/* タブレット以下：1カラムに積む（プレビュー → テンプレート＋設定 → 生成コードの順） */
@media (max-width: 880px) {
  .lm-app {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 2rem;
  }
  /* .lm-mainを透過させ、子（プレビュー/コード）を.lm-app直下のflex子にしてorderで並べ替え */
  .lm-main {
    display: contents;
  }
  /* プレビューは画面上部に達したら固定（スクロール中も表示を保つ） */
  .preview {
    order: 1;
    position: sticky;
    top: 0;
    z-index: 5;
  }
  .lm-sidebar {
    order: 2;
    position: static;
  }
  .code-panel {
    order: 3;
  }
}

/* スマホ：ボタン・余白を引き締め */
@media (max-width: 480px) {
  :root {
    --w: min(34rem, 82vw);
    --h: 9.5rem;
    --radius: 2.8rem;
  }
  .preview {
    min-height: 24rem;
    padding: 3.5rem 1.5rem;
  }
  .lm-head h1 {
    font-size: 2.4rem;
  }
  .lm-foot-links {
    display: flex;
    margin-left: 0;
    margin-top: 0.8rem;
  }
  .label {
    font-size: 2.2rem;
    letter-spacing: 0.18em;
    text-indent: 0.18em;
  }
}