:root {
  --bg: #12161c;
  --panel: #1a212b;
  --ink: #e8eef5;
  --muted: #8b97a8;
  --line: rgba(180, 200, 220, 0.16);
  --accent: #3db8a0;
  --accent-soft: rgba(61, 184, 160, 0.14);
  --degree: #9bb0c8;
  --shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, "Hiragino Mincho ProN", "Noto Serif JP", serif;
  background:
    radial-gradient(900px 420px at 12% -8%, rgba(61, 184, 160, 0.16), transparent 55%),
    radial-gradient(700px 380px at 100% 0%, rgba(80, 120, 180, 0.12), transparent 50%),
    var(--bg);
}

.home-link {
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 20;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.78rem;
  font-family: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
}

.home-link:hover { color: var(--accent); }

.app {
  max-width: 1080px;
  margin: 0 auto;
  padding: 48px 16px 56px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3rem);
  letter-spacing: -0.02em;
  line-height: 1.05;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-family: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
}

.lead {
  margin: 10px 0 0;
  color: var(--muted);
  max-width: 38rem;
  font-family: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
  line-height: 1.6;
  font-size: 0.95rem;
}

.layout {
  margin-top: 22px;
  display: grid;
  gap: 14px;
}

@media (min-width: 860px) {
  .layout {
    grid-template-columns: 240px 1fr;
    align-items: start;
  }

  .mobile-picker,
  .song-sheet {
    display: none !important;
  }
}

@media (max-width: 859px) {
  .app {
    padding-top: 40px;
    padding-bottom: 32px;
  }

  .layout {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .list-panel {
    display: none;
  }

  .mobile-picker {
    position: sticky;
    top: 36px;
    z-index: 12;
  }

  .mobile-picker__btn {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    gap: 2px 10px;
    align-items: center;
    text-align: left;
    appearance: none;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(26, 33, 43, 0.94);
    backdrop-filter: blur(10px);
    color: inherit;
    padding: 10px 12px;
    cursor: pointer;
    font: inherit;
    box-shadow: var(--shadow);
  }

  .mobile-picker__btn:hover,
  .mobile-picker__btn:focus-visible {
    border-color: rgba(61, 184, 160, 0.45);
    outline: none;
  }

  .mobile-picker__kicker {
    grid-column: 1;
    color: var(--muted);
    font-size: 0.72rem;
    font-family: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
    letter-spacing: 0.04em;
  }

  .mobile-picker__title {
    grid-column: 1;
    font-size: 1.05rem;
    font-weight: 700;
    line-height: 1.25;
  }

  .mobile-picker__meta {
    grid-column: 1;
    color: var(--muted);
    font-size: 0.78rem;
    font-family: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
    line-height: 1.35;
  }

  .mobile-picker__meta:empty {
    display: none;
  }

  .mobile-picker__chevron {
    grid-column: 2;
    grid-row: 1 / span 3;
    align-self: center;
    color: var(--accent);
    font-size: 1.1rem;
    line-height: 1;
  }

  .detail-panel .detail__head h2 {
    font-size: 1.35rem;
  }
}

.song-sheet {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  pointer-events: none;
}

.song-sheet.is-open {
  pointer-events: auto;
}

.song-sheet__backdrop {
  position: absolute;
  inset: 0;
  border: 0;
  background: rgba(8, 10, 14, 0.55);
  opacity: 0;
  transition: opacity 0.22s ease;
  cursor: pointer;
}

.song-sheet.is-open .song-sheet__backdrop {
  opacity: 1;
}

.song-sheet__panel {
  position: relative;
  z-index: 1;
  width: min(100%, 560px);
  max-height: min(86vh, 720px);
  margin: 0;
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: translateY(104%);
  transition: transform 0.24s ease;
}

.song-sheet.is-open .song-sheet__panel {
  transform: translateY(0);
}

.song-sheet__handle {
  width: 42px;
  height: 4px;
  margin: 8px auto 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
}

.song-sheet__panel .panel__head-row {
  padding: 0 14px;
  margin-bottom: 0;
}

.song-sheet [data-song-list] {
  overflow-y: auto;
  padding: 10px 14px 16px;
  -webkit-overflow-scrolling: touch;
}

@media (prefers-reduced-motion: reduce) {
  .song-sheet__backdrop,
  .song-sheet__panel {
    transition: none;
  }
}

body.sheet-open {
  overflow: hidden;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px;
}

.panel__title {
  margin: 0 0 10px;
  font-size: 0.95rem;
  font-family: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
}

.song-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.song-btn {
  width: 100%;
  text-align: left;
  appearance: none;
  border: 1px solid transparent;
  background: rgba(255, 255, 255, 0.03);
  color: inherit;
  border-radius: 10px;
  padding: 10px 12px;
  cursor: pointer;
  font: inherit;
}

.song-btn:hover { border-color: var(--line); }

.song-btn.is-active {
  border-color: rgba(61, 184, 160, 0.45);
  background: var(--accent-soft);
}

.song-btn__title {
  display: block;
  font-size: 1rem;
}

.song-btn__meta {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.8rem;
  font-family: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
}

.hidden { display: none !important; }

.muted {
  color: var(--muted);
  font-family: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
  font-size: 0.9rem;
}

.detail__head {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.detail__head h2 {
  margin: 0;
  font-size: 1.55rem;
  line-height: 1.2;
}

.detail__meta,
.detail__notes {
  margin: 6px 0 0;
  color: var(--muted);
  font-family: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
  font-size: 0.88rem;
  line-height: 1.5;
}

.transpose {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-family: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
}

.transpose__label {
  color: var(--muted);
  font-size: 0.82rem;
}

.btn {
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.25);
  color: var(--ink);
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
  font: inherit;
  font-size: 0.85rem;
}

.btn:hover { border-color: rgba(61, 184, 160, 0.45); }

.btn--primary {
  background: linear-gradient(160deg, #4ecbb2, #2f9f8a);
  border-color: transparent;
  color: #06241e;
  font-weight: 700;
}

.shift-readout {
  min-width: 3.2rem;
  text-align: center;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

.key-now {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
}

.chart {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin-top: 8px;
}

@media (max-width: 640px) {
  .chart { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.bar {
  position: relative;
  min-height: 72px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
  padding: 18px 8px 8px;
}

.bar__n {
  position: absolute;
  top: 4px;
  left: 6px;
  font-size: 0.68rem;
  color: var(--muted);
  font-family: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
}

.bar__chords {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  align-items: flex-end;
  justify-content: center;
  min-height: 44px;
}

.chord {
  display: grid;
  gap: 2px;
  justify-items: center;
  min-width: 2.8rem;
}

.chord__degree {
  min-height: 1em;
  color: var(--degree);
  font-size: 0.72rem;
  line-height: 1.1;
  font-family: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
}

.chord__degree--empty { visibility: hidden; }

.chord__symbol {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.chord--empty .chord__symbol {
  color: var(--muted);
  font-weight: 400;
}

.hint {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.78rem;
  font-family: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
}

.panel__head-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
}

.panel__head-row .panel__title { margin: 0; }

.list-block + .list-block { margin-top: 16px; }

.list-block__title {
  margin: 0 0 8px;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  font-family: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
}

.detail__source {
  margin: 6px 0 0;
  color: var(--accent);
  font-size: 0.8rem;
  font-family: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
}

.detail__actions {
  display: grid;
  gap: 10px;
  justify-items: end;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: flex-end;
}

.chart-footer-actions {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  justify-content: flex-start;
}

.btn--small { padding: 4px 8px; font-size: 0.78rem; }
.btn--tiny {
  padding: 2px 6px;
  font-size: 0.72rem;
  line-height: 1.2;
}

.btn--danger {
  border-color: rgba(220, 100, 100, 0.45);
  color: #f0b0b0;
}

.btn.is-selected,
.btn[aria-pressed="true"] {
  border-color: rgba(61, 184, 160, 0.55);
  background: var(--accent-soft);
}

.meta-form {
  display: grid;
  gap: 8px;
  grid-template-columns: 1fr 1fr;
  margin-bottom: 12px;
  font-family: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
  font-size: 0.85rem;
}

.meta-form label {
  display: grid;
  gap: 4px;
  color: var(--muted);
}

.meta-form__wide { grid-column: 1 / -1; }

.meta-form input,
.meta-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.28);
  color: var(--ink);
  padding: 7px 9px;
  font: inherit;
}

.table-toolbar { margin-bottom: 8px; }

.edit-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
}

.edit-table {
  width: 100%;
  border-collapse: collapse;
  font-family: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
  font-size: 0.82rem;
}

.edit-table th,
.edit-table td {
  border-bottom: 1px solid var(--line);
  padding: 8px;
  vertical-align: top;
}

.edit-table th {
  text-align: left;
  color: var(--muted);
  font-weight: 600;
  background: rgba(255, 255, 255, 0.03);
}

.edit-table__num {
  width: 2.2rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.edit-table__ops {
  width: 5.5rem;
  white-space: nowrap;
}

.chord-editors {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: flex-start;
}

.chord-editor {
  display: grid;
  gap: 4px;
  min-width: 7rem;
  padding: 6px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.02);
}

.chord-editor input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.28);
  color: var(--ink);
  padding: 5px 7px;
  font: inherit;
}

.chord-editor__degree {
  color: var(--degree) !important;
  font-size: 0.78rem;
}

.toast {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 40;
  background: #1c241c;
  color: #fff;
  padding: 10px 14px;
  border-radius: 10px;
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
  font-family: "Hiragino Sans", "Noto Sans JP", "Segoe UI", sans-serif;
  font-size: 0.85rem;
}

.toast.show { opacity: 1; }

@media (max-width: 640px) {
  .meta-form { grid-template-columns: 1fr; }
  .detail__actions { justify-items: stretch; }
  .action-row { justify-content: flex-start; }
}