:root {
  /* アプリ側のエイリアス */
  --bg-start: var(--color-bg-body-start);
  --bg-end: var(--color-bg-body-end);
  --shell: var(--color-bg-white);
  --ink: var(--color-text-primary);
  --muted: var(--color-text-tertiary);
  --color-border-dark: var(--color-border-medium);
  --shadow: 0 22px 60px rgba(15, 23, 42, 0.22);

  /* カラーパレット */
  --color-primary: #394f49;
  --color-primary-dark: #394f49;
  --color-secondary: #394f49;
  --color-success: #28a745;
  --color-accent: #cdff48;

  /* グレースケール */
  --color-text-primary: #222;
  --color-text-secondary: #333;
  --color-text-tertiary: #495057;
  --color-text-muted: #6c757d;
  --color-text-light: #999;

  /* 背景色 */
  --color-bg-body-start: #1c1e1a;
  --color-bg-body-end: #646464;
  --color-bg-white: #ffffff;
  --color-bg-light: #f8f9fa;
  --color-bg-lighter: #eee;
  --color-bg-primary-light: #f8f9ff;
  --color-bg-gradient-start: #667eea20;
  --color-bg-gradient-end: #764ba220;

  /* ボーダー */
  --color-border-light: #e9ecef;
  --color-border-medium: #dee2e6;
  --color-border-dark: #ccc;

  /* トーン */
  --color-tooltip-bg: #2c3e50;
  --color-tooltip-hover: #34495e;

  /* スペーシング */
  --space-xs: 0.25rem; /* 4px */
  --space-sm: 0.5rem; /* 8px */
  --space-md: 0.625rem; /* 10px */
  --space-lg: 0.9375rem; /* 15px */
  --space-xl: 1.25rem; /* 20px */
  --space-2xl: 1.875rem; /* 30px */
  --space-3xl: 2.5rem; /* 40px */

  /* フォントサイズ */
  --font-size-xs: 0.75rem; /* 12px */
  --font-size-sm: 0.85rem; /* ~13.6px */
  --font-size-base: 0.9rem; /* ~14.4px */
  --font-size-md: 0.95rem; /* ~15.2px */
  --font-size-lg: 1.1rem; /* ~17.6px */
  --font-size-xl: 1.25rem; /* 20px */
  --font-size-2xl: 1.5rem; /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */

  /* ボーダー半径 */
  --radius-sm: 0.25rem; /* 4px */
  --radius-md: 0.375rem; /* 6px */
  --radius-lg: 0.5rem; /* 8px */
  --radius-xl: 0.75rem; /* 12px */
  --radius-2xl: 1.25rem; /* 20px */
  --radius-round: 50%;

  /* シャドウ */
  --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.2);
  --shadow-md: 0 0.5rem 1.5625rem rgba(50, 113, 49, 0.3);
  --shadow-lg: 0 1.25rem 3.75rem rgba(0, 0, 0, 0.3);
  --shadow-tooltip: 0 0.25rem 0.75rem rgba(0, 0, 0, 0.3);

  /* トランジション */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;

  /* その他 */
  --header-height: 3.75rem; /* 60px */
  --footer-height: 2.5rem; /* 40px */
  --scrollbar-width: 0.5rem; /* 8px */

  /* レスポンシブルート */
  font-size: calc(0.625rem + (0.375 / 87.5) * 100vw); /* 10px〜16px */
}

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

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  padding: 20px 20px 0;
  background: linear-gradient(180deg, var(--bg-start), var(--bg-end));
  color: var(--ink);
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "Hiragino Sans",
    "Hiragino Kaku Gothic ProN",
    Meiryo,
    sans-serif;
  line-height: 1.6;
}

button,
input {
  font: inherit;
}
input {
  padding: 0.2em 0.3em;
  width: 100%;
}

.cheatsheet-header {
  padding: 1rem var(--space-xl);
  text-align: left;
  color: var(--color-text-primary);
  line-height: 1.2;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1em;
  height: var(--header-height);
  background-color: var(--color-bg-white);
  position: sticky;
  top: 0;
  z-index: 100;
}

.cheatsheet-header__title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-md);
  font-weight: 200;
  margin: 0;
}

.cheatsheet-header__subtitle {
  font-size: 1.125rem;
  font-weight: 100;
  margin: 0;
}

.app-shell {
  max-width: 100rem;
  /* min-height: calc(100vh - 20px); */
  margin: 0 auto;
  background: var(--shell);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  overflow-y: scroll;
  box-shadow: var(--shadow);
  height: calc(100vh - var(--space-xl) - var(--footer-height));
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 24px;
  padding: 18px 24px;
  border-bottom: 1px solid var(--color-border-dark);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
}

.app-header__intro {
  display: grid;
  gap: 6px;
}

.app-eyebrow,
.eyebrow {
  margin: 0;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
}

.app-title {
  margin: 0;
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 300;
  line-height: 1.1;
}

.app-lead {
  max-width: 50ch;
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 430px);
  align-items: start;
  background: var(--color-bg-lighter);
}

.workspace__main {
  min-width: 0;
  padding-bottom: 28px;
  border-right: 1px solid var(--color-border-dark);
}

.workspace__side {
  display: contents;
  /* min-width: 0; */
  /* background: var(--color); */
}

.side-sticky {
  /* position: sticky; */
  /* top: var(--header-height); */
  padding: 18px 18px 28px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 16px;
  padding: 20px 24px 16px;
}

.panel-head--side {
  padding: 0 0 14px;
  align-items: center;
}

.panel-icon-btn {
  appearance: none;
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 1px solid var(--color-border-dark);
  /* border: 1px solid var(--border); */
  border-radius: 10px;
  background: #ffffff;
  color: var(--muted);
  cursor: pointer;
  transition:
    border-color 0.18s ease,
    color 0.18s ease,
    background-color 0.18s ease,
    transform 0.18s ease;
}

.panel-icon-btn:hover {
  border-color: var(--color-primary);
  color: var(--ink);
  background: #f5f8fb;
  transform: translateY(-1px);
}

.panel-icon-btn:active {
  transform: translateY(0);
}

.panel-head h2 {
  margin: 0;
  font-size: var(--font-size-xl);
  font-weight: 300;
  color: var(--color-text-tertiary);
}

.panel-head__hint {
  max-width: 30em;
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-md);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding: 0 24px 18px;
}

.theme-picker {
  flex: 1 1 620px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
}

.theme-button {
  appearance: none;
  border: 0.125rem solid var(--color-border-light);
  /* border: 1px solid var(--color-border-dark); */
  background: #ffffff;
  color: var(--ink);
  border-radius: 14px;
  padding: 12px 14px;
  text-align: left;
  cursor: pointer;
  transition:
    transform 0.18s ease,
    box-shadow 0.18s ease,
    border-color 0.18s ease,
    background-color 0.18s ease;
}

.theme-button:hover {
  transform: translateY(-1px);
  border-color: var(--color-primary);
  box-shadow: 0 12px 24px rgba(25, 39, 62, 0.08);
}

.theme-button.is-active {
  background: var(--color-bg-body-start);
  color: #ffffff;
  border-color: var(--color-bg-body-start);
  box-shadow: 0 16px 32px rgba(16, 24, 38, 0.18);
}

.theme-button__name {
  display: block;
  font-weight: 700;
  font-size: 15px;
}

.theme-button__tone {
  display: block;
  margin-top: 2px;
  font-size: 12px;
  opacity: 0.78;
}

.controls__end {
  flex: 0 0 220px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.wrapper-field {
  display: grid;
  gap: 6px;
}

.wrapper-field span,
.control-field span {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-text-tertiary);
  display: flex;
  justify-content: space-between;
}

.wrapper-field input,
.control-field input[type="range"],
.control-field input[type="color"] {
  width: 100%;
  border: 1px solid var(--color-border-dark);
  border-radius: 12px;
  background: #ffffff;
  padding: 12px 14px;
  color: var(--ink);
}

.wrapper-field input:focus,
.control-field input:focus {
  outline: 2px solid rgba(42, 109, 244, 0.18);
  border-color: #86aefb;
}

.reset-button {
  appearance: none;
  border: 0.125rem solid var(--color-border-light);
  /* border: 1px solid var(--color-border-dark); */
  border-radius: 12px;
  background: #ffffff;
  color: var(--muted);
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
  transition:
    border-color 0.18s ease,
    color 0.18s ease,
    background-color 0.18s ease;
}

.reset-button:hover {
  border-color: var(--color-primary);
  color: var(--ink);
  background: #f5f8fb;
}

.reset-button--wide {
  width: 100%;
  margin-top: 8px;
}

.custom-controls {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
  padding-bottom: 14px;
}

.control-field {
  display: grid;
  gap: 8px;
  padding: 12px 14px;
  border: none;
  /* border: 1px solid var(--color-border-dark); */
  border-radius: 14px;
  background: #ffffff;
}

.control-field strong {
  color: var(--color-bg-body-start);
}

.control-field--compact {
  align-content: start;
  grid-column: span 2;
}

.control-field--wide {
  grid-column: span 3;
  /* grid-column: 1 / -1; */
}

.control-field input[type="color"] {
  min-height: 2em;
  border-radius: 2px; 
  padding: 0 2px;
  cursor: pointer;
}

.control-field input[type="range"] {
  padding: 0;
}

.preview-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0 24px 12px;
}

.meta-chip {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 7px 12px;
  background: var(--color-bg-body-start);
  color: #ffffff;
  font-size: 12px;
  font-weight: 700;
}

.meta-chip--soft {
  /* background: var(--color-accent); */
  background-color: #fff;
  color: var(--color-text-muted);
}

.preview-card {
  margin: 0 24px;
  overflow: hidden;
  border: 1px solid var(--color-border-dark);
  border-radius: 18px;
  background: #ffffff;
  box-shadow: 0 18px 40px rgba(20, 31, 48, 0.08);
}

.preview-card__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: var(--color-bg-body-start);
  color: #f8fbff;
}

.preview-card__label {
  margin-left: 6px;
  font-size: 13px;
  letter-spacing: 0.03em;
}

.dot {
  inline-size: 10px;
  block-size: 10px;
  border-radius: 50%;
}

.dot--red {
  background: #ff6f61;
}

.dot--yellow {
  background: #ffbe4d;
}

.dot--green {
  background: #39d98a;
}

.preview-root {
  min-height: 880px;
  padding: clamp(16px, 2vw, 30px);
  /* background:
    radial-gradient(circle at top left, rgba(205, 255, 72, 0.16), transparent 0 36%),
    linear-gradient(180deg, #f6f8fb 0%, #eef2f7 100%); */
  background-color: var(--color-bg-light);
}

.preview-root > div {
  max-width: 760px;
  margin: 0 auto;
  padding: clamp(20px, 3vw, 42px);
  border-radius: 18px;
  background: var(--blog-surface, #ffffff);
  box-shadow: 0 16px 40px rgba(18, 29, 44, 0.08);
  cursor: help;
}

.theme-note,
.mini-guide {
  background: #ffffff;
  /* border: 1px solid var(--color-border-dark); */
  border-radius: 16px;
  padding: 14px 15px;
  position: relative;
  z-index: 2;
}

.theme-note {
  display: grid;
  gap: 8px;
  margin: 0 24px 14px;
}

.theme-note__label {
  margin: 0;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
}

.theme-note strong {
  font-size: 20px;
  font-weight: 700;
}

.theme-note p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.theme-note__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 4px;
}

.theme-note__chip {
  display: inline-flex;
  align-items: center;
  padding: 5px 10px;
  border-radius: 999px;
  background: #eef3f8;
  color: var(--color-text-tertiary);
  font-size: 12px;
  font-weight: 700;
}

.theme-note__sub {
  padding-top: 4px;
  border-top: 1px solid var(--color-border-dark);
}

/* Code block */

.code-block {
  position: relative;
  margin-top: 14px;
}

.code-block__header {
  display: flex;
  align-items: center;
  gap: 8px;
}

.code-tabs {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.code-tab {
  appearance: none;
  border: 0.125rem solid var(--color-border-light);
  /* border: 1px solid var(--color-border-dark); */
  border-radius: 12px;
  background: #ffffff;
  color: var(--color-text-tertiary);
  padding: 9px 10px;
  font-weight: 700;
  cursor: pointer;
  transition: ease 0.18s;
}

.code-tab:hover {
  border-color: var(--color-primary);
}
.code-tab.is-active {
  background: var(--color-bg-body-start);
  border-color: var(--color-bg-body-start);
  color: #ffffff;
}

.code-copy-btn {
  appearance: none;
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border-dark);
  border-radius: 10px;
  background: #ffffff;
  color: var(--muted);
  cursor: pointer;
  transition:
    border-color 0.18s ease,
    color 0.18s ease,
    background-color 0.18s ease;
}

.code-copy-btn:hover {
  border-color: var(--color-primary);
  color: var(--ink);
  background: #f5f8fb;
}

.code-copy-btn.is-success {
  border-color: #39a867;
  color: #1d6a3e;
}

.code-panel-wrap {
  margin-top: 8px;
  position: relative;
}

.code-panel-wrap.is-editing .code-panel {
  display: none;
}

.code-panel {
  margin: 0;
  min-height: 420px;
  max-height: 58vh;
  overflow: auto;
  border-radius: 16px;
  background: #282c34;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
}

.code-panel code {
  display: block;
  padding: 18px;
  font-size: 13px;
  line-height: 1.7;
  font-family:
    "SFMono-Regular",
    Consolas,
    "Liberation Mono",
    Menlo,
    monospace;
}

.code-edit-textarea {
  display: block;
  width: 100%;
  min-height: 420px;
  max-height: 58vh;
  margin: 0;
  padding: 18px;
  border: none;
  border-radius: 16px;
  background: #282c34;
  color: #abb2bf;
  font-size: 13px;
  line-height: 1.7;
  font-family:
    "SFMono-Regular",
    Consolas,
    "Liberation Mono",
    Menlo,
    monospace;
  resize: vertical;
  outline: 2px solid rgba(105, 210, 255, 0.45);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
  overflow: auto;
}

.copy-feedback {
  position: fixed;
  left: 24px;
  top: 24px;
  z-index: 9999;
  max-width: min(320px, calc(100vw - 24px));
  margin: 0;
  padding: 8px 12px;
  border-radius: 10px;
  background: #202732;
  color: #ffffff;
  min-width: 10em;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.5;
  box-shadow: 0 10px 24px rgba(16, 24, 38, 0.2);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translate(-50%, calc(-100% - 10px)) scale(0.98);
  transform-origin: bottom center;
  transition:
    opacity 0.18s ease,
    transform 0.18s ease,
    visibility 0.18s ease;
}

.copy-feedback::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 50%;
  width: 10px;
  height: 10px;
  background: inherit;
  transform: translateX(-50%) rotate(45deg);
}

.copy-feedback.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, calc(-100% - 14px)) scale(1);
}

.copy-feedback.is-below {
  transform: translate(-50%, 10px) scale(0.98);
  transform-origin: top center;
}

.copy-feedback.is-below::after {
  top: -5px;
  bottom: auto;
}

.copy-feedback.is-below.is-visible {
  transform: translate(-50%, 14px) scale(1);
}

.copy-feedback.is-success {
  background: #1d6a3e;
}

.copy-feedback.is-error {
  background: #a33a3a;
}

.mini-guide {
  margin-top: 14px;
}

.mini-guide h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.mini-guide ol {
  margin: 0;
  padding-left: 1.2em;
  color: var(--muted);
}

.mini-guide li + li {
  margin-top: 6px;
}

/* Preview tag tooltip */

.preview-tooltip {
  position: fixed;
  padding: 5px 10px;
  background: #2c3e50;
  color: #ffffff;
  font-size: 12px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-weight: 600;
  letter-spacing: 0.03em;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  white-space: nowrap;
  pointer-events: none;
  z-index: 9999;
  opacity: 0;
  transform: translate(-50%, -100%) translateY(-8px);
  transition:
    opacity 0.15s ease,
    transform 0.15s ease;
}

.preview-tooltip.is-visible {
  opacity: 1;
  transform: translate(-50%, -100%) translateY(-6px);
}

.preview-tooltip::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 5px solid #2c3e50;
}

/* フッター */
.cheatsheet__footer {
  height: var(--footer-height);
  display: flex;
  justify-content: flex-end;
  max-width: 100rem;
  margin: 0 auto;
  /* background: var(--color-bg-white); */
  /* border-top: 0.0625rem solid var(--color-border-light); */
  padding: 0 var(--space-xl);
  align-items: center;
  text-align: center;
}

.cheatsheet__copyright {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  color: var(--color-accent);
  margin: 0;
}

.cheatsheet__copyright-link {
  /* color: var(--color-text-muted); */
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

@media (max-width: 1100px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .workspace__main {
    border-right: 0;
    border-bottom: 1px solid var(--color-border-dark);
  }
  .workspace__side {
    display: block;
    /* border-left: 0; */
    /* border-top: 1px solid var(--color-border-dark); */
  }

  .side-sticky {
    position: static;
  }
}

@media (max-width: 800px) {
  body {
    padding: 0;
  }
  .app-shell {
    border-radius: 0;
  }
  .app-header {
    flex-direction: column;
    align-items: start;
  }

  .theme-picker {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    flex: 1 1 auto;
  }

  .controls {
    flex-direction: column;
  }

  .controls__end {
    flex-basis: auto;
  }

  .custom-controls {
    grid-template-columns: 1fr;
    padding-left: 14px;
    padding-right: 14px;
  }

  .panel-head {
    flex-direction: column;
  }

  .preview-card {
    margin: 0 14px;
  }

  .preview-meta,
  .controls,
  .panel-head {
    padding-left: 14px;
    padding-right: 14px;
  }

  .theme-note {
    margin: 0 14px 14px;
  }

  .preview-root {
    min-height: 640px;
  }
}