:root {
  color-scheme: dark;
  --font-sans: "Noto Sans JP", "Noto Sans", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-music: "Bravura", "Noto Sans JP", "Noto Sans", system-ui, sans-serif;
  --ink: #f1f5f9;
  --muted: #94a3b8;
  --line: #334155;
  --paper: #fff;
  --canvas: #0f172a;
  --panel: #1e293b;
  --panel-strong: #334155;
  --input-bg: #0b1220;
  --accent: #7c3aed;
  --accent-dark: #6d28d9;
  --accent-soft: #a78bfa;
  --danger: #f87171;
  --ok: #34d399;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px -12px rgba(0, 0, 0, .5);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

@font-face {
  font-family: "Bravura";
  src: url("assets/bravura.woff") format("woff");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Barline Noto Serif";
  src: url("assets/noto-serif-800.ttf") format("truetype");
  font-style: normal;
  font-weight: 800;
  font-display: swap;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 1180px;
  color: var(--ink);
  background: var(--canvas);
}

.app-footer {
  position: fixed;
  right: 28px;
  bottom: 8px;
  z-index: 2;
  padding: 0;
  text-align: right;
  color: var(--muted, #888);
  font-size: 11px;
  line-height: 1;
  opacity: .75;
  pointer-events: none;
}

button, input, select { font: inherit; }
button { cursor: pointer; }

button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent-soft);
  outline-offset: 3px;
}

.app-header {
  min-height: 64px;
  padding: 10px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  color: white;
  background: #182238;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.app-header h1 {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.05;
}

.eyebrow, .step-label {
  margin: 0 0 4px;
  color: var(--accent-soft);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .17em;
}

.brand .eyebrow { margin: 0; }

.header-actions { display: flex; gap: 8px; }

.header-actions .button {
  width: 118px;
  justify-content: center;
  text-align: center;
}

.button {
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--ink);
  background: var(--panel-strong);
  font-size: 13px;
  font-weight: 700;
  transition: border-color .15s ease, background-color .15s ease, color .15s ease, opacity .15s ease;
}

.button:hover:not(:disabled) { border-color: var(--accent-soft); }
.button:active:not(:disabled) { background: var(--input-bg); }
.button:disabled { cursor: not-allowed; opacity: .55; }
.button.primary {
  border-color: var(--accent);
  color: white;
  background: var(--accent);
  box-shadow: 0 2px 10px -2px rgba(124, 58, 237, .5);
}
.button.primary:hover:not(:disabled) { border-color: var(--accent-dark); background: var(--accent-dark); }
.button.secondary { border-color: var(--line); color: var(--ink); background: var(--panel-strong); }
.button.secondary:hover:not(:disabled) { border-color: var(--accent-soft); background: var(--panel-strong); }
.button.compact { min-height: 32px; padding: 0 10px; font-size: 11px; }
.button.danger { border-color: rgba(248, 113, 113, .55); color: var(--danger); background: transparent; }
.button.danger:hover:not(:disabled) { border-color: var(--danger); background: rgba(248, 113, 113, .12); }

.file-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.file-button input { display: none; }

.workspace {
  display: grid;
  grid-template-columns: 460px minmax(760px, 1fr);
  min-height: calc(100vh - 64px);
}

.editor-panel {
  padding: 20px 24px 28px 32px;
  background: var(--canvas);
  border-right: 1px solid var(--line);
}

.editor-tabs {
  margin-bottom: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--input-bg);
}

.editor-tab {
  min-height: 38px;
  padding: 0 12px;
  border: 0;
  border-radius: 999px;
  color: var(--muted);
  background: transparent;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
  transition: border-color .15s ease, background-color .15s ease, color .15s ease;
}

.editor-tab:hover {
  border-color: var(--accent-soft);
  color: var(--accent-soft);
  background: var(--panel-strong);
}

.editor-tab.active {
  border-color: var(--accent);
  color: white;
  background: var(--accent);
}

.editor-card {
  display: none;
  margin-bottom: 20px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  overflow: visible;
}

.editor-card.active { display: block; }

.editor-card:last-child {
  margin-bottom: 0;
}

.card-heading {
  margin-bottom: 12px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 0;
  background: transparent;
}

.card-heading h2 {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.song-editor .form-grid {
  gap: 14px 12px;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  overflow: visible;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  padding: 14px;
  border-bottom: 1px solid var(--line);
  border-right: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
}

.song-editor .field {
  padding: 0;
  border: 0;
  background: transparent;
}

.field:nth-child(3n),
.field-wide { border-right: 0; }
.field-wide { grid-column: 1 / -1; }

.transpose-control {
  min-height: 48px;
  margin: 0;
  padding: 4px 0 0;
  display: flex;
  align-items: center;
  gap: 14px;
  border: 0;
  border-bottom: 0;
  background: transparent;
}

.preview-degree-control {
  min-height: 30px;
  margin: -6px 0 0;
  padding: 0;
  display: flex;
  align-items: center;
  border: 0;
  background: transparent;
}

.toggle-option {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-soft);
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
}

.toggle-option input { margin: 0; accent-color: var(--accent); }

.transpose-field {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.transpose-field select {
  min-width: 58px;
  height: 38px;
  padding: 0 28px 0 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--ink);
  background: var(--input-bg);
}

.field input, .field select, .section-label, .section-note, .bar-chord, .bar-ending-text {
  width: 100%;
  height: 38px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--ink);
  background: var(--input-bg);
  box-shadow: none;
  outline: none;
}

.field select,
.bar-key,
.bar-time-signature,
.transpose-field select {
  appearance: none;
  padding-right: 30px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='none' stroke='%2394a3b8' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m1 1 5 5 5-5'/%3E%3C/svg%3E");
  background-position: right 10px center;
  background-repeat: no-repeat;
}

.song-editor .field input,
.song-editor .field select {
  font-size: 15px;
  font-weight: 600;
}

.field input:focus, .field select:focus, .section-label:focus, .section-note:focus, .bar-chord:focus, .bar-ending-text:focus {
  border-color: var(--accent-soft);
  box-shadow: 0 0 0 2px rgba(167, 139, 250, .2);
}

.bar-chord:focus {
  outline: none;
  box-shadow: inset 0 0 0 1px rgba(167, 139, 250, .75);
}

.bar-chord:focus-visible {
  outline: none;
  outline-offset: 0;
}

.section-block {
  display: none;
  border: 0;
  border-radius: 0;
  background: transparent;
  overflow: visible;
  box-shadow: none;
}

.section-block.active { display: block; }

.section-tabs {
  margin: 0 0 12px;
  padding-bottom: 0;
  display: flex;
  gap: 5px;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
  position: relative;
  z-index: 1;
  border-bottom: 1px solid var(--line);
}

.section-tab {
  position: relative;
  top: 1px;
  flex: 0 0 auto;
  min-height: 35px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xs) var(--radius-xs) 0 0;
  color: var(--muted);
  background: var(--panel);
  font-size: 12px;
  font-weight: 800;
  cursor: pointer;
  transition: border-color .15s ease, background-color .15s ease, color .15s ease;
}

.section-tab:hover {
  border-color: var(--accent-soft);
  color: var(--accent-soft);
  background: var(--panel-strong);
}

.section-tab.active {
  border-color: var(--accent);
  border-bottom-color: var(--accent);
  color: white;
  background: var(--accent);
}

.section-tab.active:hover {
  border-color: var(--accent-dark);
  color: white;
  background: var(--accent-dark);
}

.empty-editor {
  margin: 24px 0 8px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

.section-block-header {
  padding: 10px 0 12px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  background: transparent;
  border-bottom: 0;
}

.section-title-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 7px;
}

.section-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 5px;
}

.section-actions .button {
  white-space: nowrap;
}

.section-actions .copy-section {
  border-color: var(--line);
  color: var(--accent-soft);
  background: transparent;
}

.section-label, .section-note { height: 32px; }
.section-label { font-weight: 800; }
.section-note { width: 100%; }

.modulation-toggle {
  display: flex;
  align-items: center;
  gap: 5px;
  color: var(--accent-soft);
  font-size: 12px;
  font-weight: 800;
  cursor: pointer;
  transition: color .15s ease;
}

.modulation-toggle:hover { color: white; }
.modulation-toggle input { margin: 0; accent-color: var(--accent); }

.bar-key-field,
.bar-time-field {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 9px;
  font-weight: 700;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.bar-key-field.visible,
.bar-time-field.visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.bar-key,
.bar-time-signature {
  height: 31px;
  padding: 0 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--ink);
  background: var(--input-bg);
  font-size: 14px;
  font-weight: 800;
}

.bars-editor {
  padding: 0;
  display: grid;
  gap: 10px;
}

.bar-editor {
  margin: 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.bar-editor:last-of-type { border-bottom: 1px solid var(--line); }

.bar-card-header {
  padding: 6px 14px 5px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  border-bottom: 1px solid rgba(51, 65, 85, .7);
}

.bar-top {
  padding: 11px 8px 10px;
  display: block;
}

.bar-number {
  color: var(--muted);
  font: 800 16px/1 var(--font-sans);
}

.bar-chord { height: 31px; font-weight: 700; }

.bar-chord-area {
  min-width: 0;
  display: grid;
  gap: 6px;
}

.bar-chords {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 5px;
  overflow: visible;
  padding-bottom: 2px;
}

.bar-chords label {
  min-width: 0;
  position: relative;
  display: grid;
  gap: 2px;
}

.bar-chords label span {
  color: var(--muted);
  font-size: 8px;
  font-weight: 800;
  text-align: center;
}

.bar-chords .bar-chord {
  min-width: 0;
  padding: 0 18px 0 5px;
  font-size: 12px;
  text-align: center;
}

.bar-chord.is-unrecognized {
  border-color: rgba(251, 191, 36, .75);
  background-image: linear-gradient(to right, rgba(251, 191, 36, .9) 50%, transparent 50%);
  background-position: left bottom;
  background-repeat: repeat-x;
  background-size: 6px 2px;
}

.bar-chords label span,
.bar-number {
  font-variant-numeric: tabular-nums;
}

.slot-delete {
  position: absolute;
  right: 2px;
  bottom: 3px;
  width: 16px;
  height: 16px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  color: var(--muted);
  background: transparent;
  font-size: 12px;
  line-height: 1;
  cursor: pointer;
  transition: background-color .15s ease, color .15s ease;
}

.slot-delete:hover {
  color: white;
  background: var(--danger);
}

.bar-chord-actions {
  display: flex;
  gap: 6px;
}

.bar-chord-actions .button {
  min-height: 27px;
  border-color: var(--line);
  color: var(--accent-soft);
  background: transparent;
}

.bar-chord-actions .button:hover:not(:disabled) {
  border-color: var(--accent-soft);
  background: rgba(167, 139, 250, .12);
}

.icon-button {
  width: 30px;
  height: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xs);
  color: var(--muted);
  background: var(--input-bg);
  cursor: pointer;
  transition: border-color .15s ease, background-color .15s ease, color .15s ease, transform .15s ease;
}
.icon-button:hover { color: var(--danger); border-color: var(--danger); background: rgba(248, 113, 113, .12); transform: translateY(-1px); }

.bar-options {
  padding: 8px 0 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 5px;
}

.bar-ending-text-field {
  margin-top: 8px;
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
}

.bar-ending-text-field span {
  line-height: 1;
}

.bar-ending-text {
  height: 31px;
  font-size: 12px;
  font-weight: 700;
}

.bar-settings {
  margin: 0;
  padding: 0 14px 12px;
  border-top: 1px solid var(--line);
}

.bar-settings summary {
  padding: 8px 0 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 7px;
  color: var(--accent-soft);
  font-size: 12px;
  font-weight: 800;
  cursor: pointer;
  list-style: none;
}

.bar-settings summary::-webkit-details-marker { display: none; }

.bar-settings summary::before {
  content: none;
}

.bar-settings summary::after {
  content: "⌄";
  margin-left: auto;
  color: var(--accent-soft);
  font-size: 15px;
  line-height: 1;
}

.bar-settings[open] summary::after { content: "⌃"; }

.bar-settings summary:hover {
  color: white;
}

.bar-option-summary {
  position: relative;
  top: 1px;
  min-width: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
}

.bar-option-summary span {
  min-height: 20px;
  padding: 6px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-xs);
  color: var(--accent-soft);
  background: var(--input-bg);
  font-size: 10px;
  line-height: 1;
}

.bar-change-options {
  padding-top: 8px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 8px;
}

.check-option {
  min-height: 30px;
  padding: 5px 6px;
  display: flex;
  align-items: center;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xs);
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  transition: border-color .15s ease, background-color .15s ease, color .15s ease;
}

.check-option:hover {
  border-color: var(--accent-soft);
  color: var(--accent-soft);
  background: rgba(167, 139, 250, .1);
}

.check-option:has(input:checked) {
  border-color: rgba(167, 139, 250, .55);
  color: white;
  background: rgba(124, 58, 237, .38);
}

.check-option input { margin: 0; accent-color: var(--accent); }
.bars-footer {
  padding: 2px 0 0;
  border-top: 0;
  background: transparent;
}

.add-bar {
  width: 100%;
  border-color: var(--accent);
  color: white;
  background: var(--accent);
  font-size: 13px;
}

.preview-panel {
  padding: 20px 28px 48px;
  overflow: auto;
  background: #111827;
}

.preview-toolbar {
  width: 210mm;
  max-width: 100%;
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: 11px;
}

.preview-toolbar > div {
  display: flex;
  align-items: baseline;
  gap: 10px;
  white-space: nowrap;
}

.preview-toolbar > span { white-space: nowrap; }

.preview-toolbar .step-label {
  margin: 0;
  color: var(--accent-soft);
  letter-spacing: .04em;
}

.sheet {
  width: 210mm;
  margin: 0 auto;
  display: grid;
  gap: 14px;
}

.sheet-page {
  position: relative;
  width: 210mm;
  min-height: 297mm;
  padding: 15mm 8mm 10mm;
  color: #111;
  background: var(--paper);
  box-shadow: 0 1px 2px rgba(0, 0, 0, .35), 0 18px 42px -16px rgba(0, 0, 0, .65);
}

.page-number {
  position: absolute;
  right: 14mm;
  bottom: 7mm;
  color: #888;
  font: 800 7pt/1 var(--font-sans);
}

.sheet-header {
  min-height: 23mm;
  padding-bottom: 4mm;
  border-bottom: 1.5px solid #111;
}

.sheet-title {
  margin: 0;
  font: 900 23pt/1.05 var(--font-sans);
  letter-spacing: -.03em;
}

.sheet-subhead {
  margin-top: 2mm;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 8mm;
}

.sheet-artist {
  min-width: 0;
  margin: 0;
  font: 600 10pt/1.25 var(--font-sans);
}

.sheet-meta {
  flex: 0 0 auto;
  display: flex;
  gap: 5mm;
  font: 800 9pt/1 var(--font-sans);
  text-align: left;
}

.sheet-meta span { display: block; margin-bottom: 1mm; color: #777; font-size: 6pt; letter-spacing: .12em; }

.sheet-continuation-header {
  padding-bottom: 3mm;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid #777;
  font: 800 10pt/1.2 var(--font-sans);
}

.sheet-continuation-header span {
  color: #888;
  font: 800 6pt/1 var(--font-sans);
  letter-spacing: .12em;
  text-transform: uppercase;
}

.sheet-content { padding-top: 4mm; }
.sheet-section { break-inside: avoid; }

.section-heading {
  margin: 2mm 0 .3mm;
  display: flex;
  align-items: center;
  gap: 2.5mm;
  break-after: avoid;
}

.rehearsal-mark {
  width: fit-content;
  min-width: 10mm;
  margin: 0;
  padding: .7mm 2mm;
  border: 1.5px solid #111;
  font: 900 9pt/1 var(--font-sans);
  text-align: center;
}

.section-note-preview {
  margin: 0;
  font: 600 8pt/1.2 var(--font-sans);
}

.staff-row { margin-bottom: 1.5mm; break-inside: avoid; }
.staff-svg { display: block; width: 100%; height: auto; overflow: visible; }

.empty-sheet {
  margin-top: 25mm;
  color: #888;
  font: 600 11pt/1.2 var(--font-sans);
  text-align: center;
}

.toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 10;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: white;
  background: var(--panel);
  box-shadow: var(--shadow);
  font-size: 12px;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: .2s ease;
}

.toast.visible { opacity: 1; transform: translateY(0); }

@page { size: A4 portrait; margin: 8mm 6mm; }

@media print {
  body { min-width: 0; background: white; }
  .app-header, .editor-panel, .preview-toolbar, .toast, .app-footer { display: none !important; }
  .workspace { display: block; min-height: 0; }
  .preview-panel { padding: 0; overflow: visible; background: white; }
  .sheet {
    width: auto;
    margin: 0;
    display: block;
  }
  .sheet-page {
    width: auto;
    min-height: 0;
    margin: 0;
    padding: 0;
    box-shadow: none;
    break-after: page;
  }
  .sheet-page:last-child { break-after: auto; }
  .page-number { right: 0; bottom: -7mm; }
}