:root {
  --color-bg:           #f0f2f5;
  --color-surface:      #ffffff;
  --color-header-bg:    #1c1c2e;
  --color-accent:       #e63c4b;
  --color-text:         #1a1a1a;
  --color-text-muted:   #666666;
  --color-border:       #e8e8e8;
  --color-row-sep:      #f4f4f4;
  --color-card-head:    #f7f7f9;
  --color-connect:      #2ecc71;
  --color-disconnect:   #e74c3c;
  --color-send:         #f39c12;
  --color-request:      #3498db;
  --color-save:         #e88093;
  --color-slider-track: #d8d8d8;
  --color-slider-thumb: #1c1c2e;
  --radius:    12px;
  --radius-sm:  8px;
  --shadow:    0 2px 12px rgba(0, 0, 0, 0.08);
}

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

body {
  margin: 0;
  padding: 0;
  font-family: 'Noto Sans JP', 'Yu Gothic', Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
}

/* ── Header ─────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-header-bg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  height: 56px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
}

/* ── タイトル (Plan B: 赤グロー) ─────────────────────── */
.site-header h1 {
  margin: 0;
  font-size: 1.55rem;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  cursor: default;
  text-shadow: 0 0 6px rgba(230, 60, 75, 0.25);
  transition: text-shadow 0.35s ease, letter-spacing 0.35s ease;
}


/* ── i18n ────────────────────────────────────────────── */
.i18n-en { display: none; }
body.is-en .i18n-ja { display: none; }
body.is-en .i18n-en { display: revert; }

/* ── iOS-style toggle switch ─────────────────────────── */
.ios-switch {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  cursor: pointer;
  user-select: none;
}
.ios-switch input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.ios-track {
  position: relative;
  width: 44px;
  height: 26px;
  border-radius: 13px;
  background: rgba(255,255,255,0.18);
  transition: background 0.25s;
  flex-shrink: 0;
}
.ios-track::after {
  content: '';
  position: absolute;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: #fff;
  top: 2px; left: 2px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.3);
  transition: transform 0.22s cubic-bezier(.34,1.56,.64,1);
}
.ios-switch input:checked ~ .ios-track { background: #38bdf8; }
.ios-switch input:checked ~ .ios-track::after { transform: translateX(18px); }
#langToggle ~ .ios-track { background: var(--color-accent); }
#langToggle:checked ~ .ios-track { background: #38bdf8; }
.ios-sw-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.6);
}

/* Light variant – on white card backgrounds */
.ios-switch--light .ios-track { background: #d1d1d6; }
.ios-switch--light input:checked ~ .ios-track { background: #34c759; }
.ios-switch--light .ios-sw-label {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

/* Mode toggle row between sensitivity and delay cards */
.mode-toggle-row {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: 2px 4px;
}

/* Hide advanced cards by default */
.advanced-card { display: none; }
.advanced-card.is-visible { display: block; }

.beginner-explain { display: block; }
.advanced-explain { display: none; }

.delay-toggle-item { justify-content: space-between; }
.delay-toggle-lbl { font-size: 0.85rem; font-weight: 600; color: var(--color-text); }
.delay-toggle-sub { display: block; font-size: 0.72rem; color: var(--color-text-muted); margin-top: 1px; }

/* ── ヘッダー左 ──────────────────────────────────────── */
.header-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* ── バージョンナビ ───────────────────────────────────── */
.version-nav {
  display: flex;
  gap: 4px;
}

.version-link {
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 99px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: color 0.2s, background 0.2s, border-color 0.2s;
}

.version-link:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
}

.version-link--active {
  color: #fff;
  background: rgba(255, 255, 255, 0.15);
  border-color: transparent;
}

/* ── ヘッダーリンク ───────────────────────────────────── */
.header-links {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-link {
  color: rgba(255, 255, 255, 0.65);
  font-size: 1.25rem;
  text-decoration: none;
  display: flex;
  align-items: center;
  transition: color 0.2s, transform 0.2s;
}

.header-link:hover {
  color: #ffffff;
  transform: scale(1.2);
}

.header-link--yt:hover { color: #ff4444; }
.header-link--x:hover { color: #ffffff; }
.header-link--zenn:hover { color: #3ea8ff; }

/* ── ステータスエリア ─────────────────────────────────── */
.header-status {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ステータスドット（塗りつぶし丸） */
.status-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: none;
  background: #555;
  flex-shrink: 0;
  transition: background-color 0.4s ease, box-shadow 0.4s ease;
}

.status-dot.is-connecting {
  background: #f39c12;
  animation: ring-blink 0.9s ease-in-out infinite;
}

.status-dot.is-connected {
  background: #2ecc71;
  animation: ring-don 2.2s ease-in-out infinite;
}

.status-dot.is-loading {
  background: #3498db;
  animation: ring-katsu 0.45s ease-in-out infinite;
}

.status-dot.is-error {
  background: #e74c3c;
}

@keyframes ring-don {
  0%,100% { box-shadow: 0 0 0 0 rgba(46,204,113,0.7); }
  55%      { box-shadow: 0 0 0 8px rgba(46,204,113,0); }
}

@keyframes ring-katsu {
  0%,100% { box-shadow: 0 0 0 0 rgba(52,152,219,0.7); transform: scale(1); }
  50%      { box-shadow: 0 0 0 5px rgba(52,152,219,0); transform: scale(0.75); }
}

@keyframes ring-blink {
  0%,100% { opacity: 1; }
  50%      { opacity: 0.3; }
}

/* 太鼓アイコン */
.taiko-icon {
  font-size: 1rem;
  transition: transform 0.2s;
}

/* 状態連動アニメーション（CSS sibling） */
.status-dot.is-connected ~ .taiko-icon {
  animation: taiko-don-beat 2.2s ease-in-out infinite;
}

.status-dot.is-loading ~ .taiko-icon {
  animation: taiko-katsu-beat 0.45s ease-in-out infinite;
}

.status-dot.is-connecting ~ .taiko-icon {
  animation: taiko-katsu-beat 0.9s ease-in-out infinite;
}

@keyframes taiko-don-beat {
  0%,90%,100% { transform: scale(1) rotate(0deg); }
  50%          { transform: scale(1.3) rotate(-10deg); }
  55%          { transform: scale(0.9) rotate(5deg); }
  60%          { transform: scale(1.05) rotate(0deg); }
}

@keyframes taiko-katsu-beat {
  0%,100% { transform: scale(1); }
  50%      { transform: scale(1.2) rotate(8deg); }
}

.situation {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.85);
  max-width: 280px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Main layout ─────────────────────────────────────── */
.app-layout {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 24px 20px;
  max-width: 1280px;
  margin: 0 auto;
}

/* ── Controls panel ──────────────────────────────────── */
.controls-panel {
  flex: 0 0 500px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* ── Explanation panel ───────────────────────────────── */
.explanation-panel {
  flex: 1;
  min-width: 280px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ── Card ────────────────────────────────────────────── */
.card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.button-card {
  padding: 14px 16px;
}

.card-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-text-muted);
  background: var(--color-card-head);
  border-bottom: 1px solid var(--color-border);
  padding: 9px 18px;
}

.keymap-title {
  cursor: pointer;
  user-select: none;
  transition: background 0.14s;
}
.keymap-title:hover {
  background: #efefef;
}
.keymap-chevron {
  font-size: 0.78rem;
  color: var(--color-accent);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}
.keymap-title.is-collapsed .keymap-chevron {
  transform: rotate(-180deg);
}

/* ── Button group ────────────────────────────────────── */
.button-group {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.button-group--five {
  grid-template-columns: repeat(5, 1fr);
}

button {
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  padding: 9px 16px;
  font-size: 0.88rem;
  font-family: inherit;
  cursor: pointer;
  color: var(--color-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  position: relative;
  overflow: hidden;
  width: 100%;
  transition: transform 0.18s cubic-bezier(.34,1.56,.64,1),
              box-shadow 0.18s ease,
              background-color 0.2s ease,
              color 0.2s ease,
              border-color 0.2s ease;
}

/* デフォルト状態：ボタンごとに色tint */
#connection    { background: rgba(46, 204, 113, 0.12); border-color: rgba(46, 204, 113, 0.4); }
#disconnection { background: rgba(231,  76,  60, 0.10); border-color: rgba(231, 76,  60, 0.35); }
#sendButton    { background: rgba(243, 156,  18, 0.12); border-color: rgba(243,156,  18, 0.4); }
#requestButton { background: rgba(52,  152, 219, 0.12); border-color: rgba(52, 152, 219, 0.4); }
#saveButton    { background: rgba(232, 128, 147, 0.12); border-color: rgba(232, 128, 147, 0.4); }

/* ホバー：フルカラー */
button:hover {
  transform: translateY(-3px) scale(1.06);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.16);
}
button:active {
  transform: translateY(0) scale(0.97);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
  transition-duration: 0.08s;
}

#connection:hover    { background: var(--color-connect);    color: #fff; border-color: transparent; }
#disconnection:hover { background: var(--color-disconnect); color: #fff; border-color: transparent; }
#sendButton:hover    { background: var(--color-send);       color: #fff; border-color: transparent; }
#requestButton:hover { background: var(--color-request);    color: #fff; border-color: transparent; }
#saveButton:hover    { background: var(--color-save);        color: #fff; border-color: transparent; }

/* ── ボタンアイコン ───────────────────────────────────── */
.btn-icon {
  font-size: 0.95em;
  flex-shrink: 0;
}

/* ── アイコン個別アニメーション ─────────────────────── */
#connection:hover    .btn-icon { animation: icon-wiggle 0.5s ease; }
#disconnection:hover .btn-icon { animation: icon-shake  0.45s ease; }
#sendButton:hover    .btn-icon { animation: icon-fly    0.55s ease forwards; }
#requestButton:hover .btn-icon { animation: icon-spin   0.6s ease; }

@keyframes icon-wiggle {
  0%,100% { transform: rotate(0deg); }
  20%     { transform: rotate(-20deg); }
  40%     { transform: rotate(20deg); }
  60%     { transform: rotate(-12deg); }
  80%     { transform: rotate(12deg); }
}

@keyframes icon-shake {
  0%,100% { transform: translateX(0); }
  20%     { transform: translateX(-5px); }
  40%     { transform: translateX(5px); }
  60%     { transform: translateX(-3px); }
  80%     { transform: translateX(3px); }
}

@keyframes icon-fly {
  0%   { transform: translate(0,0) rotate(0deg); opacity: 1; }
  55%  { transform: translate(8px,-8px) rotate(20deg); opacity: 0; }
  56%  { transform: translate(-4px,4px) rotate(0deg); opacity: 0; }
  100% { transform: translate(0,0) rotate(0deg); opacity: 1; }
}

@keyframes icon-spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes icon-bounce {
  0%,100% { transform: translateY(0) scale(1); }
  30%     { transform: translateY(-7px) scale(1.25); }
  60%     { transform: translateY(2px) scale(0.9); }
  80%     { transform: translateY(-3px) scale(1.05); }
}

/* ── Slider rows ─────────────────────────────────────── */
.slider-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 18px;
  border-bottom: 1px solid var(--color-row-sep);
}

.slider-row:last-child {
  border-bottom: none;
}

.pad-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  flex-shrink: 0;
  width: 52px;
}

.pad-label img {
  width: 40px;
  height: 40px;
  border-radius: 6px;
  border: 1px solid var(--color-border);
  display: block;
  transform: scaleX(-1);
}

.pad-name {
  font-size: 0.62rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.label {
  display: inline-block;
  width: 52px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text);
  flex-shrink: 0;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 6px;
  border-radius: 99px;
  background: var(--color-slider-track);
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-slider-thumb);
  border: 2.5px solid #fff;
  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.28);
  cursor: grab;
  transition: transform 0.15s;
}

input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.25); }
input[type="range"]:active::-webkit-slider-thumb { cursor: grabbing; }

input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-slider-thumb);
  border: 2.5px solid #fff;
  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.28);
  cursor: grab;
}

.slider-value {
  width: 38px;
  text-align: right;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-text);
  flex-shrink: 0;
}

.unit {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  width: 18px;
  flex-shrink: 0;
}

/* ── Explanation accordion ───────────────────────────── */
details {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

details summary {
  font-weight: 700;
  font-size: 0.88rem;
  padding: 13px 18px;
  cursor: pointer;
  background: var(--color-card-head);
  border-bottom: 1px solid var(--color-border);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  user-select: none;
  transition: background 0.14s;
  color: var(--color-text);
}

details summary::-webkit-details-marker { display: none; }

details summary::before {
  content: '▶';
  font-size: 0.6rem;
  color: var(--color-accent);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

details[open] summary::before { transform: rotate(90deg); }
details summary:hover { background: #efefef; }

/* Detail body padding */
.detail-body {
  padding: 14px 20px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--color-text-muted);
}

.detail-body ol {
  margin: 8px 0 0;
  padding-left: 1.4em;
}

.detail-body li {
  margin: 8px 0;
}

.detail-body li small {
  display: block;
  color: #999;
  font-size: 0.8em;
  margin-top: 2px;
}

.detail-body p {
  margin: 0 0 10px;
}

.detail-body ul {
  margin: 6px 0 4px;
  padding-left: 1.4em;
}

.detail-body ul li {
  margin: 4px 0;
}

.detail-body strong { color: var(--color-text); }

/* Explanation sections (inside details) */
.explanation-section {
  padding: 12px 18px;
  border-bottom: 1px solid var(--color-row-sep);
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--color-text-muted);
}

.explanation-section:last-child { border-bottom: none; }

.explanation-section h4 {
  margin: 0 0 6px;
  font-size: 0.88rem;
  color: var(--color-text);
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.std {
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

.explanation-section p { margin: 0; }
.explanation-section strong { color: var(--color-text); }

/* Drum pad icons in explanation */
.drum-icons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 6px 0 10px;
}

.drum-icon-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}

.drum-icon-item img {
  width: 34px;
  height: 34px;
  border-radius: 5px;
  border: 1px solid var(--color-border);
  display: block;
  transform: scaleX(-1);
}

.drum-icon-item span {
  font-size: 0.65rem;
  color: var(--color-text-muted);
}

details a {
  color: var(--color-accent);
  text-decoration: none;
}

details a:hover { text-decoration: underline; }

.no-style-img {
  display: block;
  width: 160px;
  height: auto;
  border: none;
  border-radius: 0;
  margin: 10px 0 4px;
  box-shadow: none;
}

/* ── Firmware steps ──────────────────────────────────── */
.fw-step {
  padding: 14px 0;
  border-bottom: 1px solid var(--color-row-sep);
}

.fw-step:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.fw-step-header {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--color-text);
  margin-bottom: 8px;
}

.fw-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 26px;
  height: 26px;
  padding: 0 6px;
  border-radius: 99px;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

.fw-step p {
  margin: 6px 0 10px;
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.fw-step strong {
  color: var(--color-text);
}

.fw-img {
  display: block;
  width: 100%;
  max-width: 480px;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  margin: 8px 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.07);
}

.fw-release-link {
  display: inline-block;
  padding: 10px 20px;
  background: #238636;
  color: #fff !important;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 8px;
  text-decoration: none;
  margin: 4px 0 8px;
  transition: background 0.15s;
}
.fw-release-link:hover {
  background: #2ea043;
}

.fw-path {
  display: inline-block;
  font-size: 12px;
  font-family: 'Consolas', 'Courier New', monospace;
  background: #f0f0f0;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 6px 12px;
  margin: 6px 0 10px;
  color: var(--color-text);
  white-space: nowrap;
  overflow-x: auto;
  max-width: 100%;
}

.fw-step code {
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 12px;
  background: #f0f0f0;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 2px 6px;
  color: var(--color-text);
}

/* ── Notification ────────────────────────────────────── */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  background: #28a745;
  color: white;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity 0.3s, transform 0.3s;
  z-index: 100;
}

.notification.show {
  opacity: 1;
  transform: translateY(0);
}

/* ── Key layout ─────────────────────────────────────── */
.keymap-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 10px 18px;
  border-bottom: 1px solid var(--color-row-sep);
}

.keymap-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 18px;
  border-bottom: 1px solid var(--color-row-sep);
}

.keymap-row:last-child {
  border-bottom: none;
}

select {
  flex: 1;
  padding: 6px 10px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.88rem;
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s;
}

select:focus {
  border-color: var(--color-accent);
}

#keyMapSendButton    { background: rgba(243, 156,  18, 0.12); border-color: rgba(243,156,  18, 0.4); }
#keyMapRequestButton { background: rgba(52,  152, 219, 0.12); border-color: rgba(52, 152, 219, 0.4); }
#keyMapSendButton:hover    { background: var(--color-send);    color: #fff; border-color: transparent; }
#keyMapRequestButton:hover { background: var(--color-request); color: #fff; border-color: transparent; }

/* ── V1.2 update banner ──────────────────────────────── */
.v12-banner {
  background: linear-gradient(135deg, rgba(230, 60, 75, 0.10) 0%, rgba(230, 60, 75, 0.04) 100%);
  border-top: 3px solid var(--color-accent);
  border-bottom: 1px solid rgba(230, 60, 75, 0.2);
  padding: 18px 20px;
}

.v12-banner-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
}

.v12-banner-title {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-accent);
  flex-shrink: 0;
}

.v12-banner-title i {
  font-size: 1.05rem;
}

.v12-banner-list {
  flex: 1;
  min-width: 240px;
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
}

.v12-banner-list li {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  padding-left: 1em;
  position: relative;
}

.v12-banner-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-size: 0.75rem;
}

.v12-banner-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 18px;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  text-decoration: none;
  flex-shrink: 0;
  transition: opacity 0.2s, transform 0.2s;
}

.v12-banner-btn:hover {
  opacity: 0.85;
  transform: translateX(3px);
}

/* ── Wiring table ────────────────────────────────────── */
.wiring-warning {
  display: flex;
  gap: 6px;
  align-items: flex-start;
  background: #fffbe6;
  border-left: 3px solid #f0ad00;
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font-size: 0.82rem;
  color: #5a4800;
  margin-bottom: 10px;
}
.wiring-warning-icon { flex-shrink: 0; }

.wiring-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}
.wiring-table th,
.wiring-table td {
  border: 1px solid var(--color-border);
  padding: 5px 10px;
  text-align: center;
}
.wiring-table thead th {
  background: var(--color-card-head);
  font-weight: 600;
  color: var(--color-text);
}
.wiring-table tbody tr:nth-child(even) td {
  background: var(--color-row-sep);
}
.wiring-table td:first-child {
  font-weight: 700;
  color: var(--color-text-muted);
}

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 960px) {
  .app-layout {
    flex-direction: column;
    align-items: center;      /* 中央揃え */
  }

  .controls-panel {
    flex: none;
    width: 100%;
    max-width: 560px;         /* 中央に収束 */
  }

  .explanation-panel {
    width: 100%;
    max-width: 560px;
  }

  .button-group {
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  }
}

@media (max-width: 560px) {
  .site-header {
    padding: 0 14px;
    height: 50px;
  }

  .site-header h1 { font-size: 1.2rem; }

  .situation { max-width: 120px; font-size: 12px; }

  .app-layout { padding: 14px 10px; gap: 12px; }

  button { font-size: 0.8rem; padding: 8px 10px; }

  .button-group {
    grid-template-columns: repeat(auto-fit, minmax(88px, 1fr));
  }
}