:root {
  --clay: #c4a07a;
  --clay-dark: #6b4a32;
  --ink: #1c140f;
  --paper: #f6efe6;
  --paper-2: #efe4d4;
  --line: #d7c4ae;
  --accent: #8b3d2f;
  --good: #2f6b4f;
  --ch1: #8b3d2f;
  --ch2: #2f5f73;
  --ch3: #6b4a8b;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--paper); color: var(--ink);
  font: 15px/1.45 "Source Sans 3", "Segoe UI", sans-serif; }
header.app {
  background: var(--ink); color: var(--paper);
  padding: 14px 20px; display: flex; align-items: baseline; gap: 14px;
  position: sticky; top: 0; z-index: 5;
}
header.app h1 { font-size: 18px; margin: 0; font-weight: 650; letter-spacing: .02em; }
header.app span { opacity: .7; font-size: 13px; }
.wrap { max-width: 1440px; margin: 0 auto; padding: 16px 22px 80px; }
.panel { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; margin: 0 0 14px; }
label.k { font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--clay-dark); font-weight: 700; display: block; margin-bottom: 6px; }
textarea#src {
  width: 100%; min-height: 74px; resize: vertical; font: 15px/1.4 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; background: var(--paper);
}
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 10px; }
button, select {
  background: var(--ink); color: var(--paper); border: 0; border-radius: 7px;
  padding: 7px 12px; cursor: pointer; font: 13px/1 inherit;
}
button.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
button.tiny { padding: 4px 8px; font-size: 12px; }
.toggle-btn { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.toggle-btn.on { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.err { color: var(--accent); font-size: 13px; min-height: 1.2em; }
.kb { display: flex; gap: 0; align-items: flex-end; flex-wrap: nowrap; flex: 1; }
.kb .oct { display: flex; gap: 0; position: relative; height: 122px; flex: 1; }
.pkey { position: relative; flex: 1; min-width: 26px; }
.key { width: 100%; height: 104px; background: #faf7f2; border: 1px solid #c9b8a4; border-right-width: 0; border-radius: 0 0 0 0; cursor: pointer; position: relative; box-sizing: border-box; }
.pkey:last-child .key:not(.black) { border-right-width: 1px; border-radius: 0 0 5px 0; }
.pkey:first-child .key:not(.black) { border-radius: 0 0 0 5px; }
.key.black { position: absolute; left: 100%; top: 0; width: 58%; min-width: 16px; max-width: 28px; height: 64px; background: var(--ink); border: 1px solid var(--ink); border-radius: 0 0 3px 3px; margin: 0; transform: translateX(-50%); z-index: 2; }
.key:hover { filter: brightness(1.05); }
.key .n { position: absolute; bottom: 3px; left: 0; right: 0; text-align: center; font-size: 9px; color: #7a6552; }
.key.black .n { color: #ddd; bottom: 2px; }
.legend { display: flex; gap: 14px; font-size: 12px; color: #5a4638; flex-wrap: wrap; }
.legend i { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 4px; vertical-align: -1px; }
.sheet { display: flex; flex-wrap: wrap; gap: 18px 0; align-items: stretch; }
.card {
  flex: 1 1 240px; width: 240px; min-width: 240px; max-width: 280px;
  background: #fff; border: 1px solid var(--line); border-radius: 8px;
  overflow: hidden; page-break-inside: avoid; break-inside: avoid;
}
.card.head { width: 100%; background: transparent; border: 0; padding: 4px 2px 2px; }
.card img { display: block; width: 100%; height: auto; background: #fff; }
.card .meta { display: flex; justify-content: space-between; align-items: baseline; padding: 5px 8px 7px; font-size: 13px; }
.card.live .meta { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; }
.card.live .meta .nm { justify-self: start; }
.card.live .meta .badge { justify-self: center; }
.card.live .meta .dur { justify-self: end; }
.card .nm { font-weight: 800; font-size: 22px; letter-spacing: .01em; }
.card .dur { color: var(--ink); font-size: 28px; line-height: 1; font-weight: 500; min-width: 1.3em; text-align: right; font-family: "Noto Music", "Noto Sans Symbols 2", "Segoe UI Symbol", serif; }
.badge { font-size: 10px; font-weight: 700; letter-spacing: .06em; padding: 2px 6px; border-radius: 99px; color: #fff; }
.badge.ch1 { background: var(--ch1); }
.badge.ch2 { background: var(--ch2); }
.badge.ch3 { background: var(--ch3); }
.card, .rest { margin-right: 28px; }
.tab-bar {
  flex: 0 0 0; width: 0; position: relative; align-self: stretch;
  margin: 0; background: none; overflow: visible;
}
.tab-bar::before {
  content: ""; position: absolute; top: 10px; bottom: 10px; width: 3px;
  left: -15.5px; background: var(--ink); border-radius: 2px;
}
.tab-bar + .tab-bar::before { left: -11px; width: 2px; }
.card.rest {
  border-style: dashed;
}
.card.rest .compact {
  min-height: 0; display: flex; align-items: center; justify-content: center;
  background: #f3e6d6; color: #7a6552; font-size: 22px; font-weight: 800; line-height: 1;
}
.card.tie .compact {
  font-size: 48px; font-weight: 500; color: var(--ink); letter-spacing: .04em; line-height: 1;
}
.tok.tie { opacity: .78; }
.tok.slide { position: relative; }
.tok .slide-mark { font-weight: 800; margin-right: 2px; opacity: .85; }
.sheet.scroll .card.rest { flex: 0 0 260px; width: 260px; }
.compact { display: block; line-height: 0; background: #f3e6d6; aspect-ratio: 1; }
.official { display: none; }
svg.ocarina { width: 100%; height: auto; display: block; background: #f3e6d6; }
.card { min-height: 160px; }
.hole { fill: rgba(255,255,255,0.18); stroke: #5a3a28; stroke-width: 3; }
.hole.on { fill: rgba(20,10,6,0.78); stroke: #1a0c08; }
.hole.tune { fill: none; stroke: #b89a80; stroke-width: 2; stroke-dasharray: 4 3; }
.thumb { fill: #f0d4b8; stroke: #5a3a28; stroke-width: 1.6; }
.thumb.on { fill: #2a1a12; }
.voicing { fill: none; stroke: #5a3a28; stroke-width: 1.4; }
.bodyfill { fill: #d2b08a; stroke: #6b4a32; stroke-width: 2.2; }
footer.hint { font-size: 12px; color: #6a5648; margin-top: 8px; }
kbd { font: 11px ui-monospace, monospace; background: var(--paper-2); border: 1px solid var(--line); border-bottom-width: 2px; padding: 0 4px; border-radius: 3px; }
@media print {
  header.app, .noprint, footer.hint { display: none !important; }
  body { background: #fff; }
  .panel { border: 0; padding: 0; }
  .card { width: 170px; }
}

.click-help { margin: 0 0 0 10px; font-size: 12px; color: #6a5648; line-height: 1.35; }
.melody-field {
  border: 1px solid var(--line); border-radius: 8px; background: var(--paper); padding: 0 0 8px;
}
.melody-field textarea#src {
  border: 0; background: transparent; margin: 0; border-radius: 8px 8px 0 0;
}
.tokens { display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 4px 10px 6px; min-height: 36px; }
.tok {
  display: inline-flex; align-items: center; gap: 8px;
  height: 44px; padding: 0 14px; border-radius: 10px; color: #fff;
  font-weight: 700; font-size: 18px; line-height: 1; white-space: nowrap;
  cursor: default; user-select: none;
  box-shadow: 0 1px 0 rgba(0,0,0,.12);
}
.tok .td { font-size: 24px; line-height: 1; font-weight: 500; font-family: "Noto Music","Noto Sans Symbols 2","Segoe UI Symbol",serif; opacity: .95; }
.tok.ch1 { background: var(--ch1); }
.tok.ch2 { background: var(--ch2); }
.tok.ch3 { background: var(--ch3); }
.tok.bar { background: #c9b8a4; color: var(--ink); font-weight: 600; height: 44px; width: auto; flex: none; min-height: 44px; }
.tok.pause { background: #8a7a6a; }
.tok.bad { background: var(--accent); }
.tok:hover { filter: brightness(1.08); }

.playback {
  margin-top: 12px; border: 1px solid var(--line); border-radius: 8px;
  background: #fff;
}
.playback-head {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
  padding: 8px 12px; border-bottom: 1px solid var(--line);
  background: #faf7f2;
}
.playback .tokens { padding: 10px 12px 12px; min-height: 48px; }

#tempoVal { display: inline-block; min-width: 3ch; text-align: right; font-variant-numeric: tabular-nums; }

.block {
  border: 1px solid var(--line); border-radius: 8px; background: #fff; margin: 0 0 12px;
}
.box-head {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
  padding: 8px 12px; border-bottom: 1px solid var(--line);
  background: #faf7f2;
}
.box-title { font-size: 11px; font-weight: 700; letter-spacing: .08em; color: var(--clay-dark); }
.box-sub { font-size: 12px; color: #6a5648; }
.tempo-lab {
  margin-left: auto; display: flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; color: var(--ink);
}
.tempo-lab input[type=range] { width: 90px; }
#inputBlock textarea#src {
  width: 100%; min-height: 74px; resize: vertical; border: 0;
  font: 15px/1.4 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  padding: 10px 12px; background: var(--paper); border-radius: 0 0 8px 8px;
}

.tok.now {
  box-shadow: 0 0 0 2px #fff, 0 0 0 4px var(--ink);
  filter: brightness(1.1);
}

#pianoBlock .kb { display: flex; width: 100%; padding: 10px 12px 6px; box-sizing: border-box; }
#pianoBlock .click-help { padding: 0 12px 10px; margin: 0; color: #6a5648; font-size: 12px; }

#inputBlock .input-legend { margin: 0; padding: 6px 12px 8px; font-size: 12px; color: #6a5648; border-top: 1px solid var(--line); background: #faf7f2; border-radius: 0 0 8px 8px; }

.box-head select, #scale {
  font: 13px/1.3 inherit; padding: 4px 8px; border-radius: 6px;
  border: 1px solid var(--line); background: #fff !important; color: #1c140f !important;
}
.box-head select option, #scale option, #scale optgroup {
  background: #fff; color: #1c140f;
}

.tempo-lab.lib-dd { gap: 6px; }
.loop-lab {
  display: flex; align-items: center; gap: 6px; cursor: pointer; margin: 0;
}
.loop-lab input { margin: 0; }
.tab-heading { margin: 0 0 8px; }
.tab-tools { margin: 0 0 10px; justify-content: flex-start; }

/* Display-mode segmented control */
.mode-seg {
  display: inline-flex; border: 1px solid var(--line); border-radius: 8px;
  overflow: hidden; background: var(--paper);
}
.seg-btn {
  background: transparent; color: var(--ink); border: 0; border-radius: 0;
  padding: 7px 14px; font: 600 13px/1 inherit; cursor: pointer;
  border-left: 1px solid var(--line);
}
.seg-btn:first-child { border-left: 0; }
.seg-btn:hover { background: var(--paper-2); }
.seg-btn.on { background: var(--ink); color: var(--paper); }

/* Zen mode call-to-action */
.zen-btn {
  margin-left: auto; background: var(--accent); color: #fff; border: 0;
  border-radius: 7px; padding: 8px 16px; font: 700 13px/1 inherit; cursor: pointer;
  box-shadow: 0 1px 0 rgba(0,0,0,.15);
}
.zen-btn:hover { filter: brightness(1.08); }

.check-lab {
  margin: 0; display: flex; align-items: center; gap: 6px;
  text-transform: none; letter-spacing: 0; font-size: 13px; font-weight: 600;
  cursor: pointer;
}
.check-lab input { margin: 0; }
h2#title { margin: 8px 0 10px; font-size: 18px; }

.lib-dd { position: relative; }
.lib-dd-wrap { position: relative; }
.lib-dd-btn {
  background: #fff !important; color: #1c140f !important;
  border: 1px solid var(--line); border-radius: 6px; padding: 4px 8px;
  font: 13px/1.3 inherit; display: inline-flex; align-items: center; gap: 10px;
  min-width: 10.5em; justify-content: space-between;
}
.lib-dd-caret { font-size: 10px; opacity: .65; }
.lib-dd-menu {
  position: absolute; top: calc(100% + 4px); right: 0; left: auto; z-index: 40;
  min-width: max(100%, 13rem); max-width: min(18rem, calc(100vw - 24px));
  max-height: 280px; overflow: auto;
  background: #fff; color: #1c140f; border: 1px solid var(--line);
  border-radius: 8px; padding: 4px; box-shadow: 0 10px 28px rgba(28,20,15,.18);
}
.lib-dd-group {
  font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  color: var(--clay-dark); padding: 8px 10px 3px;
}
.lib-dd-opt {
  display: block; width: 100%; text-align: left; background: transparent;
  color: var(--ink); border: 0; border-radius: 6px; padding: 7px 12px 7px 28px;
  font: 13px/1.3 inherit;
}
.lib-dd-opt:hover, .lib-dd-opt:focus-visible { background: var(--paper-2); }
.lib-dd-opt[aria-selected="true"] { font-weight: 700; background: var(--paper); }

.pkey .ch-line { height: 6px; margin-top: 3px; background: #ddd4c8; border-radius: 1px; }
.pkey .ch-line.c1 { background: var(--ch1); }
.pkey .ch-line.c2 { background: var(--ch2); }
.pkey .ch-line.c3 { background: var(--ch3); }
.click-help { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.ch-leg { display: inline-flex; align-items: center; gap: 6px; }
.ch-leg i { display: inline-block; width: 16px; height: 6px; border-radius: 1px; }
.ch-leg i.c1 { background: var(--ch1); }
.ch-leg i.c2 { background: var(--ch2); }
.ch-leg i.c3 { background: var(--ch3); }

.sheet-wrap { width: 100%; }
.sheet { display: flex; flex-wrap: wrap; gap: 18px 0; align-items: stretch; }
.sheet.live { justify-content: center; gap: 0; }
.sheet.live .card.live {
  flex: 0 1 420px; width: min(420px, 100%); min-width: 220px; max-width: 420px;
  margin: 0;
}
.card.live .compact { position: relative; line-height: 1; }
.card.live.is-rest .live-oca { opacity: .5; }
.card.live .rest-over {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-size: 42px; font-weight: 800; letter-spacing: .04em; color: var(--ink); line-height: 1;
  pointer-events: none; text-shadow: 0 0 12px #f3e6d6;
}
.sheet.scroll { flex-wrap: nowrap; overflow: visible; padding: 8px 16px 12px; }
.sheet-wrap:has(.scroll) {
  overflow-x: auto; scroll-behavior: smooth; padding: 8px 0;
}
.sheet.scroll .card { flex: 0 0 260px; width: 260px; }
.card.now { box-shadow: 0 0 0 3px var(--ink); }
.key.now { box-shadow: inset 0 0 0 3px #c45c26; background: #f3d2b3; }

/* Fullscreen tablature */
#tabPanel:fullscreen,
#tabPanel:-webkit-full-screen,
body.zen-fallback #tabPanel:not(.focus) {
  background: var(--paper); border-radius: 0; margin: 0;
  padding: 20px 28px; overflow: auto;
  display: flex; flex-direction: column;
}
/* CSS fallback for devices without the Fullscreen API (e.g. iPhone Safari) */
body.zen-fallback { overflow: hidden; }
body.zen-fallback #tabPanel {
  position: fixed; inset: 0; z-index: 9999;
  width: 100vw; height: 100vh; height: 100dvh;
}
#tabPanel:fullscreen .sheet-wrap,
body.zen-fallback #tabPanel .sheet-wrap { flex: 1 1 auto; display: flex; min-height: 0; }
#tabPanel:fullscreen .sheet,
body.zen-fallback #tabPanel .sheet { align-content: flex-start; width: 100%; }
#tabPanel:fullscreen .sheet.scroll,
body.zen-fallback #tabPanel .sheet.scroll { align-items: center; }

/* One-ocarina fills the screen */
#tabPanel:fullscreen .sheet.live,
body.zen-fallback #tabPanel .sheet.live {
  flex: 1 1 auto; align-items: center; justify-content: center; width: 100%;
}
#tabPanel:fullscreen .sheet.live .card.live,
body.zen-fallback #tabPanel .sheet.live .card.live {
  flex: 0 0 auto;
  width: min(90vmin, 900px); min-width: 0; max-width: min(90vmin, 900px);
}
#tabPanel:fullscreen .sheet.live .card.live .meta,
body.zen-fallback #tabPanel .sheet.live .card.live .meta { padding: 12px 20px 16px; }
#tabPanel:fullscreen .sheet.live .card.live .nm,
body.zen-fallback #tabPanel .sheet.live .card.live .nm { font-size: 44px; }
#tabPanel:fullscreen .sheet.live .card.live .dur,
body.zen-fallback #tabPanel .sheet.live .card.live .dur { font-size: 52px; }
#tabPanel:fullscreen .sheet.live .card.live .badge,
body.zen-fallback #tabPanel .sheet.live .card.live .badge { font-size: 20px; padding: 6px 18px; }
#tabPanel:fullscreen .sheet.live .card.live .rest-over,
body.zen-fallback #tabPanel .sheet.live .card.live .rest-over { font-size: 88px; }
.key.black.now { background: #6b4a32; box-shadow: inset 0 0 0 3px #e8c07a; }

/* Focus mode (fullscreen + one-ocarina): distraction-free practice */
.focus-strip, .focus-bar { display: none; }

#tabPanel.focus {
  padding: 2.5vh 3vw; align-items: center; gap: 0;
  background: #2b1d12; color: var(--paper);
  overflow: hidden;
  display: flex; flex-direction: column; border-radius: 0; margin: 0;
}
#tabPanel.focus .tab-heading,
#tabPanel.focus .tab-tools,
#tabPanel.focus #stats { display: none !important; }

#tabPanel.focus h2#title {
  flex: 0 0 auto; margin: 0 0 1.5vh; text-align: center;
  font-size: clamp(22px, 4.2vh, 44px); font-weight: 700;
  color: var(--paper);
}
#tabPanel.focus .sheet-wrap { flex: 1 1 auto; align-items: center; min-height: 0; overflow: hidden; }
#tabPanel.focus .sheet.live { height: 100%; overflow: hidden; }
#tabPanel.focus .sheet.live .card.live {
  display: flex; flex-direction: column;
  width: min(72vmin, 760px); max-width: 100%;
  height: 100%; max-height: 100%;
  box-shadow: 0 10px 40px rgba(0,0,0,.55);
}
#tabPanel.focus .sheet.live .card.live .compact {
  flex: 1 1 auto; min-height: 0; aspect-ratio: auto;
}
#tabPanel.focus .sheet.live .card.live .live-oca { width: 100%; height: 100%; }
#tabPanel.focus .sheet.live .card.live svg.ocarina { width: 100%; height: 100%; }
#tabPanel.focus .sheet.live .card.live .meta { flex: 0 0 auto; }
#tabPanel.focus .card.live { color: var(--ink); }

/* Single-line scrub strip */
#tabPanel.focus .focus-strip {
  display: block; flex: 0 0 auto; width: 100%;
  margin: 1.2vh 0 0; padding: 6px 0;
  border-top: 1px solid rgba(255,255,255,.12);
}
#tabPanel.focus .focus-tokens {
  display: flex; flex-wrap: nowrap; overflow-x: auto; overflow-y: hidden; gap: 6px;
  padding: 20px 0; align-items: center;
  scrollbar-width: none; -ms-overflow-style: none;
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 7%, #000 93%, transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0, #000 7%, #000 93%, transparent 100%);
}
#tabPanel.focus .focus-tokens::-webkit-scrollbar { display: none; }
#tabPanel.focus .focus-tokens::before,
#tabPanel.focus .focus-tokens::after { content: ""; flex: 0 0 50%; }
#tabPanel.focus .focus-tokens .tok { flex: 0 0 auto; transition: transform .12s ease; }
#tabPanel.focus .focus-tokens .tok.now {
  transform: scale(1.5); z-index: 1;
  box-shadow: 0 0 0 2px #2b1d12, 0 0 0 4px #fff, 0 4px 16px rgba(0,0,0,.5);
}

/* Transport bar */
#tabPanel.focus .focus-bar {
  display: flex; flex: 0 0 auto; flex-direction: column; align-items: center;
  gap: 1.4vh; padding: 1.5vh 0 calc(0.5vh + env(safe-area-inset-bottom));
  width: 100%; flex-shrink: 0;
}
#tabPanel.focus .focus-transport {
  display: flex; align-items: center; justify-content: center; gap: 22px;
}
#tabPanel.focus .focus-settings {
  display: flex; align-items: center; justify-content: center; gap: 18px; flex-wrap: wrap;
}
.focus-btn {
  width: 64px; height: 64px; border-radius: 50%;
  background: var(--ink); color: var(--paper); border: 0;
  font-size: 26px; line-height: 1; padding: 0;
  display: inline-flex; align-items: center; justify-content: center; cursor: pointer;
}
#tabPanel.focus .focus-btn { background: #4a331f; color: var(--paper); }
.focus-btn:hover { filter: brightness(1.12); }
.focus-btn.play {
  width: 92px; height: 92px; font-size: 40px; background: var(--good);
}
#tabPanel.focus .focus-btn.play { background: var(--good); }
.focus-btn.play:not(.is-playing) { padding-left: 7px; padding-bottom: 4px; }
.focus-btn.play.is-playing { background: var(--accent); }
#tabPanel.focus .focus-btn.play.is-playing { background: var(--accent); }

/* Loop toggle in the transport row */
#tabPanel.focus .focus-btn.loop {
  font-size: 28px;
  background: rgba(255,255,255,.14); color: var(--paper);
  border: 1px solid rgba(255,255,255,.5);
}
.focus-btn.loop.on { background: var(--good); color: var(--paper); border-color: var(--good); }
#tabPanel.focus .focus-btn.loop.on { background: var(--good); color: #fff; border-color: var(--good); }

/* Exit button: fixed top-right, fades in on mouse move */
.focus-exit { display: none; }
#tabPanel.focus .focus-exit {
  display: inline-flex; align-items: center; justify-content: center;
  position: fixed; top: 18px; right: 22px; z-index: 50;
  width: 48px; height: 48px; border-radius: 50%; font-size: 22px; cursor: pointer;
  background: rgba(0,0,0,.35); color: var(--paper);
  border: 1px solid rgba(255,255,255,.28);
  opacity: 0; pointer-events: none; transition: opacity .35s ease;
}
#tabPanel.focus.ui-visible .focus-exit { opacity: 1; pointer-events: auto; }
#tabPanel.focus .focus-exit:hover { background: rgba(0,0,0,.55); }

.focus-tempo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 15px; color: var(--ink);
}
#tabPanel.focus .focus-tempo,
#tabPanel.focus .focus-tempo span,
#tabPanel.focus .focus-tempo label { color: var(--paper); }
.focus-tempo input[type=range] { width: min(38vw, 340px); }
#focusTempoVal { min-width: 3ch; text-align: right; font-variant-numeric: tabular-nums; }