/* ============================================================
   FADD9 — style.css
   ベース: 濃紺 / アクセント: ティール・電気的青・月光黄
   ============================================================ */

:root {
  --bg: #0a0e1a;
  --bg-elevated: #101627;
  --bg-card: #121a2e;
  --line: #233047;
  --ink: #e8ecf4;
  --ink-dim: #9aa5bd;
  --teal: #2dd4bf;
  --electric: #60a5fa;
  --moonlight: #fde68a;
  --mono: "SF Mono", "Menlo", "Consolas", ui-monospace, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN",
    "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 3.5rem;
}

body {
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.8;
  letter-spacing: 0.02em;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
}

.mono {
  font-family: var(--mono);
  letter-spacing: 0.08em;
}

.container {
  width: min(100% - 2.5rem, 1080px);
  margin-inline: auto;
}

.sp-only {
  display: none;
}

/* ---- skip link ---- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0.5rem;
  z-index: 100;
  background: var(--bg-card);
  color: var(--ink);
  padding: 0.5rem 1rem;
  border: 1px solid var(--teal);
  border-radius: 4px;
}

.skip-link:focus {
  left: 0.5rem;
}

/* ---- focus ---- */
:focus-visible {
  outline: 2px solid var(--electric);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(4.5rem, 12vw, 8rem) clamp(3.5rem, 8vw, 5.5rem);
  background:
    radial-gradient(ellipse 80% 55% at 70% 20%, rgba(96, 165, 250, 0.12), transparent),
    radial-gradient(ellipse 60% 45% at 20% 80%, rgba(45, 212, 191, 0.09), transparent),
    linear-gradient(180deg, #0d1425 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--line);
}

.hero__eyebrow {
  color: var(--teal);
  font-size: 0.85rem;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.hero__title {
  font-size: clamp(1.75rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.01em;
  margin-bottom: 1.25rem;
}

.hero__lead {
  color: var(--ink-dim);
  font-size: clamp(1rem, 2vw, 1.125rem);
  margin-bottom: 2.25rem;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  margin-bottom: 2.25rem;
}

.btn {
  display: inline-block;
  padding: 0.8rem 1.75rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.btn--primary {
  color: #06251f;
  background: linear-gradient(135deg, var(--teal), var(--electric));
  box-shadow: 0 4px 24px rgba(45, 212, 191, 0.25);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(96, 165, 250, 0.35);
}

.btn--ghost {
  color: var(--ink);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.btn--ghost:hover {
  border-color: var(--moonlight);
  color: var(--moonlight);
}

.hero__tagline {
  color: var(--ink-dim);
  font-size: 0.8rem;
}

/* 月 */
.hero__moon {
  position: absolute;
  right: 8%;
  top: 18%;
  width: clamp(72px, 10vw, 128px);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 32%, #fffbe8 0%, var(--moonlight) 55%, #b98e3c 100%);
  opacity: 0.9;
  pointer-events: none;
}

/* ============================================================
   ローカルナビ
   ============================================================ */
.localnav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(10, 14, 26, 0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.localnav__list {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  overflow-x: auto;
  padding-block: 0.65rem;
}

.localnav__list a {
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  text-decoration: none;
  white-space: nowrap;
}

.localnav__list a:hover {
  color: var(--teal);
}

/* ============================================================
   セクション共通
   ============================================================ */
.section {
  padding-block: clamp(3.5rem, 9vw, 5.5rem);
}

.section + .section {
  border-top: 1px solid var(--line);
}

.section__title {
  display: flex;
  align-items: baseline;
  gap: 0.875rem;
  font-size: clamp(1.3rem, 3vw, 1.6rem);
  font-weight: 700;
  margin-bottom: 2rem;
}

.section__title::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--teal);
  box-shadow: 0 0 12px rgba(45, 212, 191, 0.6);
  flex-shrink: 0;
}

.section__sub {
  color: var(--ink-dim);
  font-size: 0.82rem;
  font-weight: 400;
}

.section__more {
  margin-top: 1.5rem;
  text-align: right;
}

/* ============================================================
   カード / メタデータ
   ============================================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.5rem;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  border-color: rgba(96, 165, 250, 0.5);
  transform: translateY(-3px);
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.35);
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.75rem;
  font-size: 0.75rem;
  padding: 0.875rem 1rem;
  margin-bottom: 1.25rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.meta div {
  display: flex;
  gap: 0.5rem;
}

.meta dt {
  color: var(--ink-dim);
}

.meta dd {
  color: var(--teal);
}

.meta dd.is-active {
  color: var(--moonlight);
}

.meta dd.is-active::before {
  content: "● ";
  animation: blink 2.4s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.card--featured {
  padding: clamp(1.75rem, 4vw, 2.5rem);
  border-color: rgba(45, 212, 191, 0.4);
  background:
    radial-gradient(ellipse 90% 120% at 90% 0%, rgba(45, 212, 191, 0.07), transparent),
    var(--bg-card);
}

.card--featured .card__name {
  font-size: clamp(1.5rem, 4vw, 2rem);
}

.card--featured .card__desc {
  max-width: 42em;
}

.card__type {
  color: var(--electric);
  font-size: 0.72rem;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.card__name {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.card__desc {
  color: var(--ink-dim);
  font-size: 0.92rem;
  margin-bottom: 0.875rem;
}

.textlink {
  color: var(--teal);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.textlink:hover {
  color: var(--moonlight);
  border-bottom-color: currentColor;
}

/* ============================================================
   Signal
   ============================================================ */
.signal-list {
  list-style: none;
}

.signal-list__item {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  column-gap: 1.5rem;
  row-gap: 0.15rem;
  align-items: baseline;
  padding-block: 1.1rem;
}

.signal-list__item + .signal-list__item {
  border-top: 1px dashed var(--line);
}

.signal-list time {
  grid-row: span 2;
  color: var(--ink-dim);
  font-size: 0.78rem;
}

.signal-list__item p {
  color: var(--ink-dim);
  font-size: 0.88rem;
}

.signal-list__item .textlink {
  justify-self: start;
}

@media (max-width: 520px) {
  .signal-list__item {
    grid-template-columns: 1fr;
    grid-template-rows: none;
  }
  .signal-list time {
    grid-row: auto;
  }
}

/* ============================================================
   グリッド
   ============================================================ */
.grid {
  display: grid;
  gap: 1.25rem;
}

.grid--3 {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid--hub {
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

/* ============================================================
   Worlds
   ============================================================ */
.world {
  position: relative;
  overflow: hidden;
}

.world::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
}

.world--classic {
  border-top: 3px solid var(--teal);
}
.world--classic::after {
  background: radial-gradient(ellipse 100% 60% at 50% 110%, rgba(45, 212, 191, 0.14), transparent);
}

.world--tunnel {
  border-top: 3px solid var(--electric);
}
.world--tunnel::after {
  background: radial-gradient(ellipse 100% 60% at 50% 110%, rgba(96, 165, 250, 0.14), transparent);
}

.world--mission {
  border-top: 3px solid var(--moonlight);
}
.world--mission::after {
  background: radial-gradient(ellipse 100% 60% at 50% 110%, rgba(253, 230, 138, 0.12), transparent);
}

.world__mode {
  font-size: 0.68rem;
  color: var(--ink-dim);
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.world__path {
  display: inline-block;
  color: var(--bg);
  background: var(--ink-dim);
  font-size: 0.72rem;
  padding: 0.05rem 0.5rem;
  border-radius: 3px;
  margin-bottom: 0.75rem;
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, var(--bg) 0%, #070a12 100%);
  padding-top: 3rem;
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2rem;
  padding-bottom: 2.5rem;
}

.footer__logo {
  color: var(--ink);
  font-size: 0.95rem;
  margin-bottom: 0.35rem;
}

.footer__tagline {
  color: var(--moonlight);
  font-size: 0.85rem;
}

.footer__heading {
  color: var(--ink-dim);
  font-size: 0.7rem;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.footer__links {
  list-style: none;
}

.footer__links a {
  display: inline-block;
  color: var(--ink-dim);
  font-size: 0.88rem;
  text-decoration: none;
  padding-block: 0.2rem;
}

.footer__links a:hover {
  color: var(--teal);
}

.footer__desc {
  font-size: 0.72rem;
  color: var(--ink-dim);
  opacity: 0.7;
  margin: 0 0 0.4rem 0;
  line-height: 1.4;
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  border-top: 1px dashed var(--line);
  padding-block: 1.25rem;
  color: var(--ink-dim);
  font-size: 0.78rem;
}

/* ============================================================
   reveal アニメーション（JS で .is-visible を付与）
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .meta dd.is-active::before {
    animation: none;
  }
  .btn,
  .card {
    transition: none;
  }
}

/* ============================================================
   レスポンシブ
   ============================================================ */
@media (max-width: 720px) {
  .sp-only {
    display: inline;
  }
  .footer__inner {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
  .hero__cta .btn {
    width: 100%;
    text-align: center;
  }
}

/* ============================================================
   Release 2 — 共通サブページ
   ============================================================ */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.section--flush-top {
  padding-top: 2rem;
}

.page-head {
  padding-block: clamp(3rem, 8vw, 4.5rem) 0;
  background:
    radial-gradient(ellipse 70% 80% at 80% -20%, rgba(96, 165, 250, 0.12), transparent),
    linear-gradient(180deg, #0d1425 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--line);
}

.page-head--slim {
  padding-block: 1.5rem 0;
}

.page-head__label {
  color: var(--ink-dim);
  font-size: 0.72rem;
}

.page-title {
  display: flex;
  align-items: baseline;
  gap: 0.875rem;
  font-size: clamp(1.6rem, 4vw, 2.25rem);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.page-title::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: var(--moonlight);
  box-shadow: 0 0 14px rgba(253, 230, 138, 0.55);
}

.page-lead {
  color: var(--ink-dim);
  margin-bottom: 2.25rem;
}

.page-lead__updated {
  display: inline-block;
  margin-left: 0.75rem;
  color: var(--teal);
  font-size: 0.72rem;
}

.crumbs {
  font-size: 0.72rem;
  margin-bottom: 1rem;
}

.crumbs a {
  color: var(--ink-dim);
  text-decoration: none;
}

.crumbs a:hover {
  color: var(--teal);
}

.crumbs span {
  color: var(--moonlight);
}

/* ============================================================
   Works 一覧
   ============================================================ */
.filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.filters__types {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.filter-btn {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-dim);
  cursor: pointer;
  font-size: 0.72rem;
  padding: 0.4rem 1rem;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.filter-btn:hover {
  color: var(--ink);
  border-color: var(--electric);
}

.filter-btn.is-on {
  color: #06251f;
  background: linear-gradient(135deg, var(--teal), var(--electric));
  border-color: transparent;
  font-weight: 700;
}

.filters__search input {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 0.9rem;
  min-width: min(280px, 100%);
  padding: 0.55rem 0.9rem;
}

.filters__search input:focus-visible {
  outline-offset: 0;
  border-color: var(--electric);
}

.filters__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.5rem;
  color: var(--ink-dim);
  font-size: 0.72rem;
  padding-block: 0.75rem;
  border-bottom: 1px dashed var(--line);
  margin-bottom: 1.75rem;
}

.tagbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.chip {
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-dim);
  cursor: pointer;
  font-size: 0.68rem;
  padding: 0.15rem 0.7rem;
  transition: color 0.15s ease, border-color 0.15s ease;
}

button.chip:hover {
  color: var(--teal);
  border-color: var(--teal);
}

.chip.is-on {
  color: var(--bg);
  background: var(--moonlight);
  border-color: var(--moonlight);
  font-weight: 700;
}

.chip--static {
  cursor: default;
}

.work-card__badges {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}

.badge {
  font-size: 0.64rem;
  padding: 0.12rem 0.55rem;
  border-radius: 3px;
  border: 1px solid currentColor;
}

.badge--tool { color: var(--teal); }
.badge--exp { color: var(--electric); }
.badge--writing { color: var(--moonlight); }

.work-card__status {
  color: var(--ink-dim);
  font-size: 0.66rem;
}

.work-card__link {
  color: var(--ink);
  text-decoration: none;
}

.work-card__link:hover {
  color: var(--teal);
}

.work-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.9rem;
  color: var(--ink-dim);
  font-size: 0.66rem;
  margin-bottom: 0.875rem;
}

.textlink--dim {
  color: var(--ink-dim);
  font-weight: 400;
  margin-left: 0.875rem;
}

.works-error {
  color: var(--ink-dim);
  grid-column: 1 / -1;
}

/* ============================================================
   Works 詳細 / Now
   ============================================================ */
.detail-title {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  margin-bottom: 0.75rem;
}

.detail-desc {
  color: var(--ink-dim);
  max-width: 46em;
  margin-bottom: 1.25rem;
}

.detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 2rem;
}

.detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  margin-bottom: 3.5rem;
}

.related {
  border-top: 1px solid var(--line);
  padding-top: 2.5rem;
}

.now-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 1.25rem;
  align-items: start;
}

.plainlist {
  list-style: none;
  color: var(--ink-dim);
  font-size: 0.92rem;
  margin-bottom: 1.5rem;
}

.plainlist li {
  padding-block: 0.35rem;
  padding-left: 1.1em;
  position: relative;
}

.plainlist li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--teal);
}

.plainlist strong {
  color: var(--ink);
}

.plainlist--lg li {
  font-size: 1rem;
  padding-block: 0.55rem;
}

.card__name--sub {
  margin-top: 0.5rem;
  font-size: 1rem;
}

.footer__bottom--solo {
  justify-content: space-between;
}

/* ============================================================
   Release 3 — Command Palette
   ============================================================ */
.palette-launch {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 60;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(16, 22, 39, 0.92);
  color: var(--ink-dim);
  cursor: pointer;
  backdrop-filter: blur(6px);
  transition: color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.palette-launch:hover,
.palette-launch:focus-visible {
  color: var(--teal);
  border-color: var(--teal);
  box-shadow: 0 0 18px rgba(45, 212, 191, 0.25);
}

.palette-launch__text {
  font-size: 0.78rem;
}

.palette-launch .mono {
  font-size: 0.7rem;
}

.palette-overlay {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: rgba(5, 8, 15, 0.66);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 12vh 1rem 1rem;
}

.palette-overlay[hidden] {
  display: none !important;
}

.palette {
  width: min(640px, 100%);
  background: var(--bg-elevated);
  border: 1px solid rgba(96, 165, 250, 0.45);
  border-radius: 12px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.55), 0 0 0 4px rgba(96, 165, 250, 0.08);
  overflow: hidden;
}

.palette__head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--line);
  color: var(--ink-dim);
}

.palette__head input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
}

.palette__head input:focus-visible {
  outline: none;
}

.palette__head kbd {
  font-size: 0.62rem;
  color: var(--ink-dim);
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 0.1rem 0.4rem;
}

.palette__list {
  list-style: none;
  max-height: 46vh;
  overflow-y: auto;
  padding: 0.35rem;
}

.palette__list li {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.5rem 0.7rem;
  border-radius: 8px;
  cursor: pointer;
}

.palette__list li.is-active {
  background: rgba(45, 212, 191, 0.12);
  outline: 1px solid rgba(45, 212, 191, 0.35);
}

.palette__group {
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  color: var(--electric);
  white-space: nowrap;
}

.palette__label {
  color: var(--ink);
  font-size: 0.9rem;
}

.palette__hint {
  color: var(--ink-dim);
  font-size: 0.68rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 14em;
}

.palette__empty {
  color: var(--ink-dim) !important;
  cursor: default !important;
  background: none !important;
  outline: none !important;
}

.palette__foot {
  padding: 0.5rem 1rem;
  border-top: 1px solid var(--line);
  color: var(--ink-dim);
  font-size: 0.64rem;
}

@media (max-width: 520px) {
  .palette-launch span.mono,
  .palette-launch__text { display: none; }
  .palette-overlay { padding-top: 6vh; }
}

/* ============================================================
   Fadd9 OS
   ============================================================ */
.os-body {
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.menubar {
  position: relative;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.45rem 1rem;
  background: rgba(13, 20, 37, 0.94);
  border-bottom: 1px solid var(--line);
  font-size: 0.72rem;
  color: var(--ink-dim);
}

.menubar__brand {
  color: var(--moonlight);
  font-weight: 700;
}

.menubar__menus {
  letter-spacing: 0.12em;
}

.menubar__spacer {
  flex: 1;
}

.menubar__btn {
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--teal);
  font-family: inherit;
  font-size: 0.66rem;
  padding: 0.2rem 0.8rem;
  cursor: pointer;
}

.menubar__btn:hover {
  border-color: var(--teal);
}

.menubar__clock {
  color: var(--ink);
}

.desktop {
  position: relative;
  flex: 1;
  overflow: hidden;
  background:
    radial-gradient(ellipse 90% 60% at 75% 10%, rgba(96, 165, 250, 0.10), transparent),
    radial-gradient(ellipse 70% 50% at 15% 85%, rgba(45, 212, 191, 0.08), transparent),
    linear-gradient(180deg, #0c1322 0%, #0a0e1a 100%);
}

.desktop__moon {
  right: 6%;
  top: 12%;
  opacity: 0.55;
}

.desk-icons {
  position: absolute;
  left: 1.25rem;
  top: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  z-index: 5;
}

.desk-icon {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  width: 86px;
  padding: 0.55rem 0.3rem;
  background: transparent;
  border: none;
  border-radius: 8px;
  color: var(--ink);
  cursor: pointer;
  font-family: var(--sans);
  font-size: 0.68rem;
}

.desk-icon:hover,
.desk-icon:focus-visible {
  background: rgba(255, 255, 255, 0.06);
}

.desk-icon__glyph {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  font-size: 1.25rem;
  color: var(--bg);
  background: linear-gradient(160deg, var(--teal), var(--electric));
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.desk-icon__glyph--start {
  background: linear-gradient(160deg, var(--moonlight), #f59e0b);
}

.desk-icon__label {
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
}

.windows {
  position: absolute;
  inset: 0;
  z-index: 10;
  pointer-events: none;
}

.win {
  pointer-events: auto;
  position: absolute;
  max-width: min(560px, calc(100vw - 24px));
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.55);
  overflow: hidden;
  touch-action: none;
}

.win.is-focused {
  border-color: rgba(96, 165, 250, 0.55);
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.65), 0 0 0 3px rgba(96, 165, 250, 0.08);
}

.win__bar {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.42rem 0.7rem;
  cursor: grab;
  user-select: none;
  background:
    repeating-linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.05) 0 1px,
      transparent 1px 3px
    ),
    linear-gradient(180deg, #1b2742, #141c31);
  border-bottom: 1px solid var(--line);
}

.win.is-focused .win__bar {
  background:
    repeating-linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.07) 0 1px,
      transparent 1px 3px
    ),
    linear-gradient(180deg, #234a63, #173048);
}

.win__stripes {
  width: 34px;
  height: 12px;
  border-radius: 2px;
  background: repeating-linear-gradient(
    90deg,
    rgba(253, 230, 138, 0.55) 0 2px,
    transparent 2px 4px
  );
  opacity: 0.8;
}

.win__title {
  flex: 1;
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--ink);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.win__close {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.08);
  color: var(--ink);
  font-size: 0.8rem;
  line-height: 1;
  cursor: pointer;
}

.win__close:hover {
  background: #b91c1c;
  border-color: #ef4444;
}

.win__body {
  max-height: min(56vh, 480px);
  overflow-y: auto;
  padding: 0.9rem 1rem 1.1rem;
}

.win__lead {
  color: var(--ink);
  font-size: 0.88rem;
  margin-bottom: 0.9rem;
}

.win__menu {
  list-style: none;
}

.win__menu a,
.file-row .file-row__name {
  text-decoration: none;
}

.win__menu li {
  border-bottom: 1px dashed var(--line);
}

.win__menu a {
  display: block;
  padding: 0.5rem 0.15rem;
  color: var(--teal);
  font-size: 0.88rem;
  font-weight: 600;
}

.win__menu a:hover {
  color: var(--moonlight);
}

.win__note {
  margin-top: 1rem;
  color: var(--ink-dim);
  font-size: 0.66rem;
}

.file-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.48rem 0.35rem;
  border-bottom: 1px dashed var(--line);
  border-radius: 4px;
  color: var(--ink);
}

.file-row:hover,
.file-row:focus-visible {
  background: rgba(45, 212, 191, 0.09);
}

.file-row__name {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--ink);
}

a.file-row:hover .file-row__name {
  color: var(--teal);
}

.file-row__meta {
  color: var(--ink-dim);
  font-size: 0.6rem;
  text-align: right;
}

.dock {
  position: relative;
  z-index: 30;
  display: flex;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.55rem 1rem 0.75rem;
  background: rgba(13, 20, 37, 0.94);
  border-top: 1px solid var(--line);
}

.dock a {
  color: var(--ink-dim);
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  text-decoration: none;
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
}

.dock a:hover {
  color: var(--teal);
  border-color: var(--teal);
}

/* Compact Mode */
.compact {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem 1rem 2rem;
}

.compact[hidden] {
  display: none;
}

.compact__intro {
  margin-bottom: 1.5rem;
  color: var(--ink-dim);
  font-size: 0.88rem;
}

.compact__label {
  color: var(--moonlight);
  font-size: 0.66rem;
  margin-bottom: 0.35rem;
}

.compact__sec {
  margin-bottom: 1.75rem;
}

.compact__title {
  color: var(--ink);
  font-size: 0.95rem;
  margin-bottom: 0.4rem;
}

body.os-compact .desktop,
body.os-compact .dock,
body.os-compact .menubar__menus {
  display: none;
}

@media (max-width: 719px) {
  .desk-icons {
    flex-direction: row;
    flex-wrap: wrap;
    right: 1rem;
  }
  .desk-icon { width: 72px; }
}

/* ============================================================
   Release 4 — Recent Files / 更新履歴
   ============================================================ */
.recent-list {
  list-style: none;
}

.recent-list li {
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  align-items: baseline;
  gap: 0.9rem;
  padding-block: 0.65rem;
  border-bottom: 1px dashed var(--line);
}

.recent-list time {
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.recent-list .badge {
  font-size: 0.58rem;
  padding: 0.05rem 0.45rem;
}

.recent-list a {
  color: var(--ink);
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.recent-list a:hover { color: var(--teal); }

.recent-list .recent-lang {
  color: var(--ink-dim);
  font-size: 0.7rem;
  text-align: right;
}

@media (max-width: 560px) {
  .recent-list li {
    grid-template-columns: auto 1fr;
  }
  .recent-list .badge,
  .recent-list .recent-lang { display: none; }
}

.timeline {
  list-style: none;
  border-left: 2px solid var(--line);
  margin-left: 0.5rem;
}

.timeline li {
  position: relative;
  padding: 0 0 1.75rem 1.5rem;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 0.45em;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 10px rgba(45, 212, 191, 0.6);
}

.timeline time {
  display: block;
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 0.7rem;
  margin-bottom: 0.15rem;
}

.timeline h2 {
  font-size: 1.02rem;
  margin-bottom: 0.35rem;
}

.timeline p {
  color: var(--ink-dim);
  font-size: 0.9rem;
}

/* ============================================================
   fadd9 — hero layout / chord figure / abc boards
   ============================================================ */

.hero__layout {
  display: flex;
  align-items: center;
  gap: clamp(2rem, 5vw, 4rem);
}

.hero__body {
  flex: 1 1 auto;
  min-width: 0;
}

.hero__chord {
  flex: 0 0 auto;
}

.chord-figure {
  margin: 0;
  text-align: center;
}

.chord-figure svg {
  width: clamp(150px, 17vw, 200px);
  height: auto;
  filter: drop-shadow(0 0 28px rgba(45, 212, 191, 0.16));
}

.chord-figure figcaption {
  margin-top: 0.6rem;
  color: var(--ink-dim);
  font-size: 0.72rem;
}

.section__lead {
  color: var(--ink-dim);
  max-width: 52ch;
  margin-bottom: 2.25rem;
}

/* ---- 譜例ボード ---- */
.boards {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 860px) {
  .boards {
    grid-template-columns: 1fr 1fr;
  }
}

.abc-board {
  margin: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.abc-board__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.55rem 0.95rem;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
}

.abc-board__file {
  color: var(--teal);
  font-size: 0.78rem;
  text-decoration: none;
}

a.abc-board__file:hover {
  text-decoration: underline;
}

.badge-soft {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.08rem 0.6rem;
  color: var(--ink-dim);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.abc-board pre {
  margin: 0;
  padding: 1.05rem 1.15rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.75;
  letter-spacing: 0.02em;
}

/* ---- ライブラリ grid / PLANNED バッジ ---- */
.grid--4 {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.planned {
  display: inline-block;
  margin-left: 0.4em;
  border: 1px dashed var(--line);
  border-radius: 4px;
  padding: 0 0.45em;
  color: var(--ink-dim);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  vertical-align: 0.1em;
}

/* ---- 譜例詳細ページ ---- */
.abc-board--detail {
  margin-top: 2rem;
  max-width: 720px;
}

.btn-copy {
  border: 1px solid var(--line);
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--ink);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  padding: 0.2rem 0.7rem;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.btn-copy:hover {
  color: var(--teal);
  border-color: var(--teal);
}

.copy-note {
  color: var(--teal);
  font-size: 0.75rem;
  margin-top: 0.6rem;
}

/* ---- 楽譜パネル(紙)と再生コントロール ---- */
.score-panel {
  margin: 2rem 0 0;
  max-width: 720px;
  background: #fdfbf4;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.score-panel svg {
  display: block;
  width: 100%;
  height: auto;
  /* abcjs は楽譜を currentColor（CSS color）で描画する。
     親(.score-panel より外)のダークテーマ color(--ink, 明るい色)を継承すると
     明るい紙背景に同系色で描画されて薄くなるため、紙に合う濃い色を明示する。 */
  color: #1a1d26;
}

.score-fallback {
  padding: 1.5rem 1.25rem;
  color: var(--ink-dim);
  font-size: 0.85rem;
}

.audio-bar {
  max-width: 720px;
  margin-top: 0.75rem;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.85rem 1rem;
}

.audio-hint {
  margin-top: 0.35rem;
  color: var(--ink-dim);
  font-size: 0.68rem;
}

/* ---- abcjs 再生コントロール(Play/Pause) ----
   abcjs は DOM だけ出して見た目はページ側に委ねているため、
   CSS 未定義だと ▶⏸⏳ の 3 SVG が重なって表示される。
   状態クラス: 再生中=.abcjs-pushed(ボタン) / 準備中=.abcjs-loading(コンテナ) */
.audio-bar .abcjs-inline-audio {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.audio-bar .abcjs-btn {
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 52px;
  height: 52px;
  margin: 0;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--teal);
  cursor: pointer;
  transition: filter 0.12s ease, transform 0.12s ease;
}

.audio-bar .abcjs-btn:hover {
  filter: brightness(1.15);
}

.audio-bar .abcjs-btn:active {
  transform: scale(0.93);
}

.audio-bar .abcjs-btn:focus-visible {
  outline: 2px solid var(--moonlight);
  outline-offset: 3px;
}

.audio-bar .abcjs-btn svg {
  width: 20px;
  height: 20px;
  fill: #06222c;
}

/* アイコン状態切替(既定は ▶、再生中は ⏸、準備中は ◌) */
.audio-bar .abcjs-pause-svg,
.audio-bar .abcjs-loading-svg {
  display: none;
}

/* loading 円はテンプレに stroke 色が無く、fill:none も .abcjs-btn svg より
   復活させておかないと純円につぶれるためここで両方指定 */
.audio-bar .abcjs-loading-svg {
  fill: none;
  stroke: #06222c;
}

.audio-bar .abcjs-pushed .abcjs-play-svg {
  display: none;
}

.audio-bar .abcjs-pushed .abcjs-pause-svg {
  display: block;
}

.audio-bar .abcjs-loading .abcjs-play-svg,
.audio-bar .abcjs-loading .abcjs-pause-svg {
  display: none;
}

.audio-bar .abcjs-loading .abcjs-loading-svg {
  display: block;
  animation: abcjs-spin 0.9s linear infinite;
}

@keyframes abcjs-spin {
  to { transform: rotate(360deg); }
}

/* シークバー(JS が indicator の left を px 指定するため relative 必須) */
.audio-bar .abcjs-midi-progress-background {
  position: relative;
  flex: 1 1 140px;
  min-width: 120px;
  height: 10px;
  padding: 0;
  border: none;
  border-radius: 5px;
  background: rgba(232, 236, 244, 0.14);
  cursor: pointer;
}

.audio-bar .abcjs-midi-progress-indicator {
  position: absolute;
  left: 0;
  top: -3px;
  width: 4px;
  height: 16px;
  border-radius: 2px;
  background: var(--moonlight);
}

/* WARP(速度変更)入力 */
.audio-bar .abcjs-tempo-wrapper {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.audio-bar .abcjs-midi-tempo {
  width: 3.6em;
  padding: 0.28rem 0.35rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.8rem;
  text-align: right;
}

.audio-bar .abcjs-midi-tempo:focus-visible {
  outline: 1px solid var(--teal);
  outline-offset: 1px;
}

@media (prefers-reduced-motion: reduce) {
  .audio-bar .abcjs-loading .abcjs-loading-svg {
    animation: none;
  }
}

/* ---- Reference チートシート ---- */
.ref-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.ref-item {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.25rem 1.35rem;
}

.ref-item .card__name {
  margin-bottom: 0.4rem;
}

.ref-item .card__desc {
  margin-bottom: 0.9rem;
}

.ref-code {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.7rem 0.85rem;
  overflow-x: auto;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--ink);
}

.ref-demo {
  margin: 0.9rem 0 0;
  background: #fdfbf4;
  border-radius: 6px;
  overflow: hidden;
}

.ref-demo svg {
  display: block;
  width: 100%;
  height: auto;
}

/* ---- Playground ---- */
.playground__toolbar {
  align-items: center;
}

.playground__status {
  color: var(--ink-dim);
  font-size: 0.72rem;
}

.pg-select {
  appearance: none;
  cursor: pointer;
}

.playground__cols {
  display: grid;
  gap: 1.25rem;
  align-items: start;
}

@media (min-width: 900px) {
  .playground__cols {
    grid-template-columns: minmax(280px, 5fr) 7fr;
  }
}

#pg-input {
  width: 100%;
  min-height: 380px;
  resize: vertical;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem 1.05rem;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.85rem;
  line-height: 1.75;
  letter-spacing: 0.02em;
}

#pg-input:focus-visible {
  outline-offset: -2px;
}

.score-panel--flush {
  margin-top: 0;
}

@media (max-width: 720px) {
  .hero__layout {
    flex-direction: column-reverse;
    align-items: flex-start;
    gap: 2rem;
  }

  .chord-figure svg {
    width: clamp(130px, 34vw, 160px);
  }
}

/* 再生中の音符ハイライト */
.score-panel .abcjs-note_selected {
  fill: var(--teal);
  transition: fill 0.1s ease;
}

/* ワークシート */
.worksheet-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.5rem;
  background: var(--bg-elevated);
}

.worksheet-card h3 {
  margin: 0 0 0.5rem;
}

.worksheet-card p {
  margin: 0 0 1rem;
  color: var(--ink-muted);
  font-size: 0.9rem;
}

.worksheet-card .card__action {
  margin: 0;
}

/* 印刷用スタイル */
@media print {
  .no-print,
  .skip-link,
  .localnav,
  .page-head,
  .footer,
  .audio-bar,
  .playground__toolbar,
  .filters,
  .btn,
  .btn-copy,
  .work-card__action,
  .section__more {
    display: none !important;
  }

  body {
    background: white;
    color: black;
    font-size: 12pt;
  }

  .container {
    max-width: 100%;
    padding: 0;
    margin: 0;
  }

  .score-panel {
    border: 1px solid #ccc;
    padding: 1rem;
    margin-bottom: 1rem;
  }

  .abc-board {
    border: 1px solid #ccc;
    padding: 1rem;
    margin-bottom: 1rem;
  }

  .audio-bar {
    display: none !important;
  }

  .playground__score {
    border: 1px solid #ccc;
    padding: 1rem;
  }

  a[href]::after {
    content: none;
  }

  .card {
    border: 1px solid #ccc;
    padding: 1rem;
    margin-bottom: 1rem;
  }
}

/* ---- Landing page demos ---- */
.landing-demo {
  margin: 0.75rem 0;
  min-height: 60px;
}

.landing-demo svg {
  width: 100%;
  height: auto;
}

.btn--sm {
  font-size: 0.8rem;
  padding: 0.35rem 0.9rem;
}

/* ---- Practice Log ---- */
.practice-summary {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}
.practice-stat {
  display: flex;
  flex-direction: column;
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--teal);
}
.practice-stat small {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--ink-dim);
  letter-spacing: 0.08em;
}

.practice-form {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}
.practice-form__row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}
.practice-form__actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.75rem;
}
.practice-label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.8rem;
  color: var(--ink-dim);
  flex: 1;
  min-width: 120px;
}
.practice-input {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 0.95rem;
  padding: 0.45rem 0.6rem;
}
.practice-input:focus {
  outline: none;
  border-color: var(--teal);
}
.practice-input--sm {
  max-width: 120px;
}
.practice-input::placeholder {
  color: var(--ink-dim);
  opacity: 0.6;
}

.practice-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.practice-entry {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.85rem 1rem;
}
.practice-meta {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 0.3rem;
}
.practice-date {
  font-size: 0.8rem;
  color: var(--teal);
}
.practice-bpm,
.practice-dur {
  font-size: 0.75rem;
  color: var(--moonlight);
}
.practice-what {
  font-weight: 500;
}
.practice-note {
  font-size: 0.85rem;
  margin-top: 0.15rem;
}
.practice-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.4rem;
}
.textlink--danger {
  color: #f87171;
}
.textlink--danger:hover {
  color: #fca5a5;
}

.muted {
  color: var(--ink-dim);
}

/* ---- Converter Tool ---- */
.converter-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
}
.converter-tab {
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  padding: 0.6rem 1rem;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.converter-tab:hover {
  color: var(--ink);
}
.converter-tab.is-active {
  color: var(--teal);
  border-bottom-color: var(--teal);
}

.converter-panel {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.5rem;
}
.converter-panel__title {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}
.converter-panel__desc {
  font-size: 0.85rem;
  color: var(--ink-dim);
  margin-bottom: 1rem;
}

.converter-input-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  align-items: flex-end;
  margin-bottom: 1rem;
}
.converter-input-row--wrap {
  flex-wrap: wrap;
}
.converter-input {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.95rem;
  padding: 0.45rem 0.65rem;
  flex: 1;
  min-width: 160px;
}
.converter-input:focus {
  outline: none;
  border-color: var(--teal);
}
.converter-input--sm {
  max-width: 72px;
  min-width: 56px;
  flex: 0 0 auto;
  text-align: center;
}
.converter-select {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.85rem;
  padding: 0.45rem 0.5rem;
}
.converter-label {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  font-size: 0.7rem;
  color: var(--ink-dim);
  letter-spacing: 0.05em;
}

.converter-output {
  min-height: 2rem;
}
.converter-output:empty {
  display: none;
}

.converter-sub {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}
.converter-sub:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}
.converter-sub__title {
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

/* chord→fret results */
.cf-result {
  margin-bottom: 0.6rem;
  padding: 0.6rem 0.8rem;
  background: var(--bg);
  border-radius: 4px;
}
.cf-capo {
  font-size: 0.85rem;
  color: var(--teal);
  display: block;
  margin-bottom: 0.3rem;
}
.cf-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.cf-cell {
  font-family: var(--mono);
  font-size: 0.85rem;
}

/* fret→note results */
.fn-note {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.85rem;
  margin-right: 1rem;
  margin-bottom: 0.3rem;
}

@media (max-width: 640px) {
  .converter-tabs {
    flex-direction: column;
  }
  .converter-tab {
    border-bottom: none;
    border-left: 2px solid transparent;
    text-align: left;
  }
  .converter-tab.is-active {
    border-left-color: var(--teal);
    border-bottom-color: transparent;
  }
  .converter-input-row {
    flex-direction: column;
  }
  .converter-input,
  .converter-input--sm {
    max-width: 100%;
    min-width: 0;
  }
}

@media (max-width: 640px) {
  .practice-form__row {
    flex-direction: column;
  }
  .practice-input--sm {
    max-width: 100%;
  }
  .practice-summary {
    gap: 1rem;
  }
  .practice-stat {
    font-size: 1.5rem;
  }
}