/* Páginas de teoría (/teoria/…): texto corto, ejemplos en pentagrama que suenan y el ejercicio al lado. */
:root {
  --bg: #FAF9F8;
  --surface: #FFFFFF;
  --line: #E4E2DE;
  --line-strong: #CBC8C3;
  --ink: #121213;
  --ink-2: #585652;
  --ink-3: #7A7772;
  --staff: #3D3B38;
  --brand: #DB0934;
  --brand-hover: #B6072B;
  --on-brand: #FFFFFF;
  --fail: #C2410C; --fail-bg: #FDEDE4; --fail-text: #8A2E08;
  --info-bg: #E8EFF8; --info-text: #14355F; --info: #1E4E8C;
  --key-white: #FFFFFF; --key-black: #242322;
  --focus: #ED3157;
  --font-display: 'Playfair Display', 'Iowan Old Style', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-music: 'Noto Music', 'Bravura', 'Apple Symbols', 'Segoe UI Symbol', serif;
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --bg: #121213; --surface: #1B1A1A; --line: #3D3B38; --line-strong: #585652;
  --ink: #FAF9F8; --ink-2: #CBC8C3; --ink-3: #A5A29C; --staff: #CBC8C3;
  --brand: #ED3157; --brand-hover: #F36884; --on-brand: #121213;
  --fail: #F08A5D; --fail-bg: #2E1A10; --fail-text: #F9C4A8;
  --info-bg: #14223A; --info-text: #B7CBEA; --info: #8DB0E2;
  --key-white: #E4E2DE; --key-black: #030304;
  color-scheme: dark; } }
:root[data-theme="dark"] {
  --bg: #121213; --surface: #1B1A1A; --line: #3D3B38; --line-strong: #585652;
  --ink: #FAF9F8; --ink-2: #CBC8C3; --ink-3: #A5A29C; --staff: #CBC8C3;
  --brand: #ED3157; --brand-hover: #F36884; --on-brand: #121213;
  --fail: #F08A5D; --fail-bg: #2E1A10; --fail-text: #F9C4A8;
  --info-bg: #14223A; --info-text: #B7CBEA; --info: #8DB0E2;
  --key-white: #E4E2DE; --key-black: #030304;
  color-scheme: dark;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 1rem/1.65 var(--font-sans); padding-inline: 16px; padding-block: 24px 48px; }
.wrap { max-width: 680px; margin: 0 auto; display: flex; flex-direction: column; gap: 22px; }
a { color: var(--ink); text-decoration-color: var(--line-strong); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--ink); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
.eyebrow { font: 500 .75rem/1.4 var(--font-sans); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); margin: 0; }
.eyebrow a { color: inherit; text-decoration: none; }
.eyebrow a:hover { color: var(--ink); }
h1 { font: 700 2.25rem/1.14 var(--font-display); letter-spacing: -.015em; margin: 6px 0 8px; text-wrap: balance; }
h2 { font: 700 1.1875rem/1.35 var(--font-sans); margin: 8px 0 0; }
p { margin: 0; }
.lead { color: var(--ink-2); font-size: 1.0625rem; max-width: 60ch; }
article { display: flex; flex-direction: column; gap: 14px; }
article p, article li { max-width: 64ch; }
article ul, article ol { margin: 0; padding-left: 1.3em; display: flex; flex-direction: column; gap: 4px; }
strong { font-weight: 700; }

/* El ejercicio, arriba: discreto; abajo, el botón principal (el único carmesí de la página) */
.go-top { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; padding: 10px 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); font-size: .9375rem; color: var(--ink-2); }
.go-top a { font-weight: 700; }
.go-end { display: flex; flex-direction: column; gap: 12px; align-items: flex-start; padding: 18px 16px; border-radius: 14px; background: var(--surface); border: 1px solid var(--line); margin-top: 6px; }
.go-end p { color: var(--ink-2); }
.primary { display: inline-block; border: 0; background: var(--brand); color: var(--on-brand); font: 700 .9375rem/1 var(--font-sans); padding: 13px 20px; border-radius: 9px; text-decoration: none; }
.primary:hover { background: var(--brand-hover); }

/* Ejemplos */
figure.ej { margin: 4px 0; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 14px 14px 12px; display: flex; flex-direction: column; gap: 10px; }
.ej-dibujo { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.ej-dibujo svg { width: 100%; height: auto; display: block; }
.ej-pie { display: flex; gap: 10px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
figcaption { font-size: .875rem; color: var(--ink-2); flex: 1 1 260px; }
.oir { border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink); font: 500 .875rem/1 var(--font-sans); padding: 9px 14px; border-radius: 8px; cursor: pointer; }
.oir:hover { border-color: var(--ink-3); }
.oir::before { content: ''; display: inline-block; width: 0; height: 0; border-left: 8px solid currentColor; border-top: 5px solid transparent; border-bottom: 5px solid transparent; margin-right: 7px; vertical-align: 0; }

svg.staff .line { stroke: var(--staff); stroke-width: 1.4; }
svg.staff .barl { stroke: var(--staff); stroke-width: 1.4; }
svg.staff .clef { fill: var(--staff); font-family: var(--font-music); }
svg.staff .clefbar, svg.staff .ink, svg.staff .rest { fill: var(--ink); }
svg.staff .rest { font-family: var(--font-music); }
svg.staff .stem { stroke: var(--ink); stroke-width: 1.5; }
svg.staff .head { fill: var(--ink); }
svg.staff .hole { fill: var(--surface); }
svg.staff .acc line { stroke: var(--ink); }
svg.staff .acc polygon { fill: var(--ink); }
svg.staff .acc path { stroke: var(--ink); }
svg.staff .ts { fill: var(--ink); font: 700 22px var(--font-sans); text-anchor: middle; }
svg.staff .lab { fill: var(--ink-2); font: 700 13px var(--font-sans); text-anchor: middle; }
svg.staff .ev.on .head, svg.staff .ev.on .ink { fill: var(--info); }
svg.staff .ev.on .stem, svg.staff .ev.on .acc line, svg.staff .ev.on .acc path { stroke: var(--info); }
svg.staff .ev.on .acc polygon { fill: var(--info); }

svg.keys { width: 100%; height: auto; display: block; }
svg.keys .kw { fill: var(--key-white); stroke: var(--line-strong); cursor: pointer; }
svg.keys .kb { fill: var(--key-black); cursor: pointer; }
svg.keys .kw.mark { fill: var(--info-bg); stroke: var(--info); stroke-width: 2; }
svg.keys .kb.mark { fill: var(--info); }

.nota { border-left: 3px solid var(--line-strong); padding: 2px 0 2px 12px; color: var(--ink-2); font-size: .9375rem; }
table { border-collapse: collapse; width: 100%; font-size: .9375rem; }
th, td { text-align: left; padding: 7px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 700; color: var(--ink-2); font-size: .8125rem; }
.tabla { overflow-x: auto; }

/* Índice */
.temas { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.temas li { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; display: flex; flex-direction: column; gap: 3px; }
.temas a { font-weight: 700; font-size: 1.0625rem; text-decoration: none; }
.temas a:hover { text-decoration: underline; }
.temas span { color: var(--ink-2); font-size: .9375rem; }

footer { font: 400 .75rem/1.5 var(--font-sans); color: var(--ink-3); border-top: 1px solid var(--line); padding-top: 12px; margin-top: 10px; }
footer a { color: inherit; }
@media (max-width: 420px) {
  h1 { font-size: 1.875rem; }
  figure.ej { padding: 12px 10px 10px; }
}