/* SiteSing: an engraved-score look. White paper, black ink, serif titles, and a rubric red for
   the things to press. Dark mode follows the system unless the visitor picks one (data-theme). */

:root {
  --paper: #ffffff;
  --paper-2: #f7f5f0;
  --sidebar: #e9e4d9;
  --sidebar-rule: #d3ccbe;
  --ink: #1b1a17;
  --ink-soft: #3d3a34;
  --muted: #6f6a60;
  --rule: #d9d4ca;
  --rubric: #a3281f;
  --rubric-dark: #841f18;
  --rubric-soft: #f8ebe8;
  --on-ink: #ffffff;
  --focus: #2f6fd6;
  --serif: "Cormorant Garamond", "EB Garamond", Garamond, "Times New Roman", Georgia, serif;
  --sans: "Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --sheet-shadow: 0 1px 1px rgb(27 26 23 / 6%), 0 6px 24px rgb(27 26 23 / 8%);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #161513;
    --paper-2: #23211d;
    --sidebar: #1e1c19;
    --sidebar-rule: #33302a;
    --ink: #ece7dd;
    --ink-soft: #cfc8bb;
    --muted: #a39c8f;
    --rule: #3a3631;
    --rubric: #d4574a;
    --rubric-dark: #bf4639;
    --rubric-soft: #3a211d;
    --on-ink: #161513;
    --focus: #7aa7f0;
    --sheet-shadow: 0 1px 1px rgb(0 0 0 / 40%), 0 6px 24px rgb(0 0 0 / 35%);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --paper: #161513;
  --paper-2: #23211d;
  --sidebar: #1e1c19;
  --sidebar-rule: #33302a;
  --ink: #ece7dd;
  --ink-soft: #cfc8bb;
  --muted: #a39c8f;
  --rule: #3a3631;
  --rubric: #d4574a;
  --rubric-dark: #bf4639;
  --rubric-soft: #3a211d;
  --on-ink: #161513;
  --focus: #7aa7f0;
  --sheet-shadow: 0 1px 1px rgb(0 0 0 / 40%), 0 6px 24px rgb(0 0 0 / 35%);
  color-scheme: dark;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.5 var(--sans);
}

a { color: var(--rubric); }

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

:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

h1, h2, h3 { font-family: var(--serif); font-weight: 600; margin: 0; letter-spacing: .005em; }

/* Cormorant's old-style figures make "Soprano 1" read like "Soprano I". */
:where(h1, h2, h3, .brand, .contents .piece-name) { font-variant-numeric: lining-nums; }

input[type="range"] { accent-color: var(--ink); }

.app { display: grid; grid-template-columns: 290px minmax(0, 1fr); min-height: 100vh; }

/* ------------------------------------------------------------------ sidebar */

.sidebar {
  position: sticky; top: 0; height: 100vh;
  display: flex; flex-direction: column; gap: 14px;
  padding: 20px 16px;
  background: var(--sidebar);
  border-right: 1px solid var(--sidebar-rule);
  overflow: hidden;
}
.sidebar-head { display: flex; align-items: center; justify-content: space-between; }

.brand {
  display: inline-flex; align-items: center; gap: 8px;
  font: italic 600 27px/1 var(--serif);
  color: var(--ink); text-decoration: none; white-space: nowrap;
}
.brand-mark {
  width: 18px; height: 24px; flex: none; background: currentColor;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 32'%3E%3Cellipse cx='8' cy='25' rx='7' ry='5' transform='rotate(-22 8 25)'/%3E%3Crect x='12.6' y='2' width='2.4' height='22'/%3E%3Cpath d='M15 2c5 2 8 5 7 10-2-3-4-4-7-4z'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 32'%3E%3Cellipse cx='8' cy='25' rx='7' ry='5' transform='rotate(-22 8 25)'/%3E%3Crect x='12.6' y='2' width='2.4' height='22'/%3E%3Cpath d='M15 2c5 2 8 5 7 10-2-3-4-4-7-4z'/%3E%3C/svg%3E") center / contain no-repeat;
}

.usual-part {
  display: flex; flex-direction: column; gap: 6px;
  padding: 12px; border: 1px solid var(--sidebar-rule); border-radius: 10px; background: var(--paper);
}
.usual-part > span { font-size: 14px; font-weight: 600; }
.usual-part select { width: 100%; }

#filter {
  width: 100%; padding: 9px 12px;
  border: 1px solid var(--sidebar-rule); border-radius: 8px; background: var(--paper);
}

.library { overflow-y: auto; flex: 1; margin: 0 -6px; padding: 0 6px 12px; }
.folder { margin-bottom: 6px; }
.folder summary {
  font: 600 13px/1.2 var(--sans); text-transform: uppercase; letter-spacing: .1em; color: var(--muted);
  margin: 12px 4px 4px; cursor: pointer; user-select: none;
}
.folder summary::marker { color: var(--rubric); }
.folder:first-child summary { margin-top: 0; }
.folder.untitled summary { display: none; }

.piece-link {
  display: flex; align-items: baseline; gap: 8px;
  padding: 7px 8px; border-radius: 6px;
  color: var(--ink); text-decoration: none;
}
.piece-link .piece-name {
  font-size: 15px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0;
}
/* A dotted leader to the duration, as in a printed table of contents. */
.piece-link .leader { flex: 1; min-width: 12px; border-bottom: 1px dotted var(--muted); transform: translateY(-4px); }
.piece-link .duration { color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; }
.piece-link .piece-parts { display: none; }
#library .leader, #library .duration { display: none; }
.piece-link:hover { background: var(--paper); }
.piece-link:hover .piece-name { color: var(--rubric); }
.piece-link[aria-current="page"] { background: var(--paper); }
.piece-link[aria-current="page"] .piece-name { color: var(--rubric); }
.empty { color: var(--muted); padding: 8px; font-size: 15px; }

/* ------------------------------------------------------------------ layout */

.content { display: flex; flex-direction: column; min-width: 0; min-height: 100vh; }

.topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 32px; max-width: 1680px; width: 100%; margin: 0 auto;
}
.topbar-brand { font-size: 24px; }
.spacer { flex: 1; }

.view { width: 100%; max-width: 1680px; margin: 0 auto; padding: 0 32px 32px; flex: 1; }

.icon-button { border: 0; background: none; font-size: 26px; line-height: 1; color: var(--muted); padding: 0 4px; }
.icon-button:hover { color: var(--ink); }
.sidebar-tools { display: flex; align-items: center; gap: 4px; }
.theme-toggle { font-size: 18px; width: 32px; height: 32px; border-radius: 50%; }
.theme-toggle:hover { background: var(--paper); }
.scrim { display: none; }

/* ------------------------------------------------------------------ buttons */

.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 1px solid var(--ink); border-radius: 999px;
  background: var(--paper); color: var(--ink);
  padding: 8px 16px; font-weight: 600; line-height: 1.2;
}
.button:hover:not(:disabled) { background: var(--paper-2); }
.button:disabled { opacity: .45; }
.button.small { padding: 5px 12px; font-size: 14px; }
.button.quiet { border-color: var(--rule); }
.button.primary { background: var(--rubric); border-color: var(--rubric); color: #fff; }
.button.primary:hover:not(:disabled) { background: var(--rubric-dark); }
.button svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }

.link { border: 0; background: none; padding: 0 0 0 6px; color: var(--rubric); font-size: 13px; font-weight: 600; text-decoration: underline; }
.link:disabled { visibility: hidden; }

select {
  padding: 8px 10px; min-width: 150px;
  border: 1px solid var(--rule); border-radius: 8px; background: var(--paper);
  font-size: 15px; font-weight: 600;
}

.check { display: inline-flex; align-items: center; gap: 8px; font-size: 15px; cursor: pointer; }
.check input { width: 18px; height: 18px; margin: 0; accent-color: var(--rubric); }

/* After .button, which would otherwise show these. */
.only-narrow, .library-open-button, .topbar-brand { display: none; }
.only-wide { display: inline-flex; }

/* ------------------------------------------------------------------ welcome */

.welcome { max-width: 680px; margin: 3vh auto 0; }
.contents-title { text-align: center; font-size: 30px; padding-bottom: 8px; border-bottom: 2px solid var(--ink); margin-bottom: 6px; }
.contents { overflow: visible; margin: 0; padding: 0; }
.contents .folder summary { margin: 20px 0 6px; }
.contents .piece-link { padding: 12px 8px; border-bottom: 1px solid var(--rule); border-radius: 0; flex-wrap: wrap; }
.contents .piece-name { font: 600 24px/1.2 var(--serif); }
.contents .piece-link .piece-parts { display: block; flex-basis: 100%; color: var(--muted); font-size: 13px; letter-spacing: .04em; }
.contents .piece-link:hover { background: var(--paper-2); }

/* ------------------------------------------------------------------ sections */

.player { padding: 4px 0 26px; }
/* The sheet fills the screen; only the transport bar sits below it. */
.player-screen { display: flex; flex-direction: column; height: calc(100vh - 72px); height: calc(100dvh - 72px); min-height: 420px; }
.section-head { display: flex; align-items: baseline; flex-wrap: wrap; gap: 4px 18px; margin-bottom: 14px; }
.section-head h2 { font-size: 30px; line-height: 1.1; }
.section-note { margin: 0; color: var(--muted); font-size: 15px; }

/* ------------------------------------------------------------------ the sheet */

.sheet {
  background: var(--paper);
  border: 1px solid var(--rule);
  box-shadow: var(--sheet-shadow);
  padding: 18px 22px 12px;
  position: relative;
  flex: 1 1 0; min-height: 0; display: flex; flex-direction: column;
}
.sheet-head {
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: end; gap: 12px;
  padding-bottom: 10px;
}
.sheet-title { grid-column: 2; font-size: clamp(26px, 3.6vw, 40px); font-weight: 700; line-height: 1.05; text-align: center; }
.sheet-tempo { grid-column: 1; grid-row: 1; justify-self: start; }
.sheet-part { grid-column: 3; grid-row: 1; justify-self: end; display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: flex-end; gap: 8px 24px; }
.sheet-select { display: flex; flex-direction: column; align-items: flex-start; gap: 6px; font-size: 14px; font-weight: 600; white-space: nowrap; }
.sheet-part select { min-width: 0; padding: 5px 8px; font: 600 15px var(--sans); }
#stage { display: block; width: 100%; flex: 1 1 0; min-height: 0; background: #fff; cursor: pointer; touch-action: manipulation; }
/* The printed score is drawn on white; in dark mode it shows as light ink on dark paper. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) #stage { filter: invert(.9) hue-rotate(180deg); }
}
:root[data-theme="dark"] #stage { filter: invert(.9) hue-rotate(180deg); }
.sheet-foot {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 12px; align-items: center;
  padding-top: 8px; font-size: 14px; color: var(--muted);
}
.sheet-page { color: var(--ink-soft); }
.sheet-page:not(:empty)::before { content: "— "; }
.sheet-page:not(:empty)::after { content: " —"; }
.sheet-hint { justify-self: end; }

/* ------------------------------------------------------------------ transport */

.transport { display: flex; align-items: center; gap: 18px; margin-top: 14px; flex: none; }
.play {
  width: 64px; height: 64px; flex: none;
  border-radius: 50%; border: 0;
  background: var(--rubric); color: #fff;
  display: grid; place-items: center;
  box-shadow: 0 2px 8px rgb(163 40 31 / 30%);
}
.play:hover:not(:disabled) { background: var(--rubric-dark); }
.play:disabled { opacity: .45; cursor: wait; box-shadow: none; }
.play svg { width: 28px; height: 28px; fill: currentColor; }
.scrub { flex: 1; min-width: 0; }
.scrub input { width: 100%; }
.times { display: flex; justify-content: space-between; font-size: 14px; color: var(--muted); font-variant-numeric: tabular-nums; }

.status { margin: 8px 0 0; color: var(--muted); font-size: 15px; }
.status:empty { display: none; }

/* ------------------------------------------------------------------ practice settings */

.practice {
  display: flex; flex-wrap: wrap; gap: 18px 32px; align-items: flex-end;
  margin-top: 22px; padding-top: 18px; border-top: 1px dashed var(--rule);
}
.field { display: flex; flex-direction: column; gap: 6px; }
.field.inline { flex-direction: row; align-items: center; gap: 10px; }
.label { font-size: 14px; font-weight: 600; color: var(--ink); }
.field output { font-variant-numeric: tabular-nums; }

.stepper {
  display: inline-flex; align-items: center; align-self: flex-start;
  border: 1px solid var(--rule); border-radius: 999px; background: var(--paper);
}
.stepper output { width: 56px; text-align: center; font-weight: 700; }
.step-button {
  width: 38px; height: 38px; flex: none;
  border: 0; border-radius: 50%; background: none;
  font-size: 22px; line-height: 1; color: var(--ink);
}
.step-button:hover:not(:disabled) { background: var(--paper-2); color: var(--rubric); }
.step-button:disabled { opacity: .3; }

.tempo-row { display: flex; align-items: center; gap: 2px; }
.tempo-row input { width: 150px; }
.tempo-toggle { display: none; }
.tempo-value { margin-left: 8px; font-weight: 700; min-width: 70px; white-space: nowrap; }

.loop-range { font: 500 15px/1 var(--sans); color: var(--muted); margin-left: 4px; }
.loop-range.on { color: var(--rubric); font-weight: 700; }
.loop-buttons { display: flex; gap: 6px; flex-wrap: wrap; }
.checks { flex-direction: row; gap: 18px; padding-bottom: 9px; }

/* ------------------------------------------------------------------ download */

.download-menu { position: relative; flex: none; }
.download-menu summary { list-style: none; cursor: pointer; }
.download-menu summary::-webkit-details-marker { display: none; }
.download-menu[open] summary { background: var(--paper-2); }
.download-panel {
  position: absolute; right: 0; bottom: calc(100% + 8px); z-index: 5; width: min(340px, 90vw);
  padding: 14px; background: var(--paper); border: 1px solid var(--rule); border-radius: 10px;
  box-shadow: 0 6px 30px rgb(0 0 0 / 22%);
}
.download-panel .section-note { margin-bottom: 12px; font-size: 14px; }
.download-options { display: flex; flex-direction: column; gap: 8px; }
.download-choice {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 11px 20px 11px 14px;
  border: 1.5px solid var(--ink); border-radius: 999px;
  background: var(--paper); color: var(--ink);
  font-size: 16px; font-weight: 600;
}
/* A download arrow in a circle. */
.download-choice::before {
  content: ""; width: 26px; height: 26px; flex: none; background: currentColor;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cdefs%3E%3Cmask id='a'%3E%3Crect width='24' height='24' fill='white'/%3E%3Cpath d='M12 6v9m0 0l-4-4m4 4l4-4M7 18h10' fill='none' stroke='black' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/mask%3E%3C/defs%3E%3Ccircle cx='12' cy='12' r='12' mask='url(%23a)'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cdefs%3E%3Cmask id='a'%3E%3Crect width='24' height='24' fill='white'/%3E%3Cpath d='M12 6v9m0 0l-4-4m4 4l4-4M7 18h10' fill='none' stroke='black' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/mask%3E%3C/defs%3E%3Ccircle cx='12' cy='12' r='12' mask='url(%23a)'/%3E%3C/svg%3E") center / contain no-repeat;
}
.download-choice:hover:not(:disabled) { background: var(--paper-2); }
.download-choice:disabled { opacity: .45; }
.export-loop { margin-top: 14px; }
.progress { height: 8px; background: var(--paper-2); border-radius: 4px; margin-top: 16px; overflow: hidden; }
.progress div { height: 100%; width: 0; background: var(--rubric); transition: width .2s; }

/* ------------------------------------------------------------------ advanced */

.advanced { border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.advanced summary {
  padding: 16px 0; cursor: pointer; list-style: none;
  font-size: 17px; font-weight: 600; display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap;
}
.advanced summary::-webkit-details-marker { display: none; }
.advanced summary::before { content: "▸"; color: var(--rubric); font-size: 16px; transition: transform .15s; }
.advanced[open] summary::before { transform: rotate(90deg); }
.advanced-body { padding: 0 0 20px; }
.advanced-row { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.presets { display: flex; gap: 6px; flex-wrap: wrap; }

.mixer-cols, .part {
  display: grid;
  grid-template-columns: 96px minmax(90px, 180px) minmax(0, 1fr) 90px;
  align-items: center;
  gap: 12px;
}
.mixer-cols { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; padding: 0 8px 6px; border-bottom: 1px solid var(--ink); }
.mixer-cols span:last-child { text-align: right; }
.part { padding: 8px; }
.part + .part { border-top: 1px solid var(--rule); }
.part.highlighted { background: var(--rubric-soft); }
.part.silent .name, .part.silent .level { opacity: .45; }
.part .star { justify-self: start; }
.part .star input { width: 18px; height: 18px; accent-color: var(--rubric); }
.part .name { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.part .name small { font: 400 13px var(--sans); color: var(--muted); }
.part .level { display: flex; align-items: center; gap: 8px; }
.part .level input { flex: 1; min-width: 0; }
.part .level output { width: 44px; text-align: right; font-size: 14px; color: var(--muted); }
.part .toggles { display: flex; gap: 6px; justify-content: flex-end; }
.toggle {
  width: 36px; height: 32px;
  border: 1px solid var(--rule); border-radius: 6px;
  background: var(--paper); font-weight: 700; font-size: 13px;
}
.toggle[aria-pressed="true"].mute { background: var(--ink); border-color: var(--ink); color: var(--on-ink); }
.toggle[aria-pressed="true"].solo { background: var(--rubric); border-color: var(--rubric); color: #fff; }

.master { display: flex; align-items: center; gap: 12px; margin-top: 12px; padding: 12px 8px 0; border-top: 1px solid var(--ink); font-weight: 600; }
.master input { flex: 1; max-width: 320px; }
.master output { font: 14px var(--sans); color: var(--muted); font-variant-numeric: tabular-nums; }

.footer { text-align: center; color: var(--muted); font-size: 13px; padding: 24px 16px; }

/* ------------------------------------------------------------------ narrow screens */

@media (min-width: 861px) {
  body.sidebar-hidden .app { grid-template-columns: minmax(0, 1fr); }
  body.sidebar-hidden .sidebar { display: none; }
  body.sidebar-hidden .library-open-button, body.sidebar-hidden .topbar-brand { display: inline-flex; }
}

@media (max-width: 860px) {
  .app { grid-template-columns: minmax(0, 1fr); }
  .sidebar {
    position: fixed; z-index: 20; left: 0; top: 0; bottom: 0; width: min(320px, 88vw);
    transform: translateX(-100%); transition: transform .2s ease;
  }
  body.library-open .sidebar { transform: none; box-shadow: 0 0 40px rgb(0 0 0 / 25%); }
  body.library-open .scrim { display: block; position: fixed; inset: 0; z-index: 10; background: rgb(27 26 23 / 35%); }
  .only-narrow, .library-open-button, .topbar-brand { display: inline-flex; }
  .only-wide { display: none; }
}

/* The tempo controls and the part picker do not fit beside a long title: give the title its own row. */
@media (max-width: 1280px) {
  .sheet-head { grid-template-columns: 1fr auto; align-items: center; row-gap: 6px; }
  .sheet-title { grid-column: 1 / -1; grid-row: 1; }
  .sheet-tempo { grid-column: 1; grid-row: 2; }
  .sheet-part { grid-column: 2; grid-row: 2; }
}

@media (max-width: 640px) {
  .topbar { padding: 10px 16px; gap: 8px; flex-wrap: wrap; }
  .topbar-brand { order: -1; flex-basis: 100%; justify-content: center; }
  .view { padding: 0 16px 24px; }
  .section-head h2 { font-size: 26px; }
  .sheet { padding: 12px 10px 8px; margin: 0 -6px; }
  .sheet-hint { display: none; }
  .sheet-foot { grid-template-columns: 1fr auto; }
  .practice { gap: 18px; }
  .practice .field { flex: 1 1 100%; }
  .tempo-row input { flex: 1; width: auto; min-width: 0; }
  .mixer-cols { display: none; }
  .part { grid-template-columns: 28px minmax(0, 1fr) auto; grid-template-areas: "star name toggles" "level level level"; row-gap: 4px; }
  .part .star { grid-area: star; }
  .part .name { grid-area: name; }
  .part .toggles { grid-area: toggles; }
  .part .level { grid-area: level; }
  .advanced-row .field.inline { flex-direction: column; align-items: stretch; width: 100%; }
  select { width: 100%; }
}

/* ------------------------------------------------------------------ home page part picker, phones */

.home-part { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 14px 0 4px; font-weight: 600; }
.home-part select { min-width: 0; flex: 0 1 200px; }

@media (max-width: 640px) {
  body { -webkit-text-size-adjust: 100%; }
  select, input[type="search"] { font-size: 16px; } /* stops iOS zooming in on focus */
  .topbar { padding-top: max(10px, env(safe-area-inset-top)); }
  .welcome { margin-top: 0; }
  .contents-title { font-size: 26px; }
  .contents .piece-name { font-size: 22px; }
  .home-part { flex-direction: column; align-items: stretch; gap: 6px; }
  .home-part select { flex: none; width: 100%; }

  /* Sheet, then a two-row transport: play and scrubber, then Download full width. */
  .player-screen { height: calc(100dvh - 100px); min-height: 380px; }
  /* Title, then tempo beside relative volume, then the part picker.  The tempo slider opens as a
     panel over the sheet when its button is tapped. */
  .sheet-head { position: relative; grid-template-columns: 1fr 1fr; align-items: end; gap: 10px 12px; padding-bottom: 6px; }
  .sheet-title { grid-column: 1 / -1; grid-row: 1; font-size: 24px; }
  .sheet-tempo { grid-column: 1; grid-row: 2; justify-self: stretch; }
  .sheet-part { display: contents; }
  .sheet-part > .field { grid-column: 2; grid-row: 2; }
  .sheet-select { grid-column: 1 / -1; grid-row: 3; flex-direction: row; align-items: center; justify-content: space-between; }
  .sheet-select select { flex: 0 1 60%; max-width: 60%; }
  .tempo-toggle {
    display: block; width: 100%; min-height: 46px; padding: 0 12px;
    border: 1px solid var(--rule); border-radius: 999px; background: var(--paper);
    font: 700 16px var(--sans); color: var(--ink); font-variant-numeric: tabular-nums;
  }
  .sheet-tempo.open .tempo-toggle { border-color: var(--rubric); }
  .tempo-row {
    display: none; position: absolute; left: 0; right: 0; top: 100%; z-index: 5;
    margin-top: 4px; padding: 6px 8px; width: auto;
    border: 1px solid var(--rule); border-radius: 12px; background: var(--paper); box-shadow: var(--sheet-shadow);
  }
  .sheet-tempo.open .tempo-row { display: flex; }
  .tempo-row .tempo-value { display: none; }
  .sheet-foot { font-size: 13px; }
  .transport { flex-wrap: wrap; gap: 10px 14px; padding-bottom: env(safe-area-inset-bottom); }
  .play { width: 56px; height: 56px; }
  .download-menu { flex: 1 1 100%; }
  .download-menu summary { width: 100%; }
  .download-panel { left: 0; right: 0; width: auto; }
  .stepper { align-self: stretch; justify-content: space-between; }
  .step-button { width: 44px; height: 44px; }
  .view { padding-bottom: max(24px, env(safe-area-inset-bottom)); }
  .advanced summary { padding: 18px 0; }
}