/* Cue Ledger — Part Book Editorial
   Distinto de: staff gauge, packing slip, seed packet, cyan atlas, cassette, chalk, etc. */

:root {
  color-scheme: light;
  --paper: #EDE8DC;
  --paper-deep: #E2DAC8;
  --ink: #1C1A17;
  --ink-soft: #4A453C;
  --stave: #8B8578;
  --brass: #A67C2D;
  --burgundy: #6B2D3C;
  --rule: rgba(28, 26, 23, 0.14);
  --display: "Bodoni Moda", "Times New Roman", Georgia, serif;
  --text: "Karla", "Segoe UI", sans-serif;
  --shell: 66rem;
  --gutter: clamp(1.15rem, 4.2vw, 2.6rem);
  --band: clamp(2.4rem, 5.5vw, 4.2rem);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    linear-gradient(90deg, transparent 0, transparent calc(var(--gutter) + 2.2rem), var(--rule) calc(var(--gutter) + 2.2rem), var(--rule) calc(var(--gutter) + 2.25rem), transparent calc(var(--gutter) + 2.25rem)),
    repeating-linear-gradient(
      180deg,
      transparent 0,
      transparent 27px,
      rgba(139, 133, 120, 0.22) 27px,
      rgba(139, 133, 120, 0.22) 28px
    ),
    linear-gradient(165deg, var(--paper-deep) 0%, var(--paper) 42%, #F4F0E6 100%);
  color: var(--ink);
  font-family: var(--text);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.1rem);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.skip {
  position: absolute; left: -9999px;
  background: var(--burgundy); color: var(--paper); padding: 0.65rem 1rem; z-index: 40;
}
.skip:focus { left: 0.75rem; top: 0.75rem; }
:focus-visible { outline: 3px solid var(--brass); outline-offset: 3px; }

.shell {
  width: 100%; max-width: var(--shell);
  margin-inline: auto; padding-inline: var(--gutter);
}

/* Part-book stave signature */
.staves {
  position: relative;
  padding-block: 0.85rem;
}
.staves::before {
  content: "";
  position: absolute;
  inset: 0.35rem 0;
  background: repeating-linear-gradient(
    180deg,
    transparent 0,
    transparent 11px,
    var(--stave) 11px,
    var(--stave) 12px
  );
  opacity: 0.55;
  pointer-events: none;
}
.measure {
  font-family: var(--display);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--burgundy);
}

.top {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(8px);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  border-bottom: 1px solid var(--rule);
}
.top__row {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding-block: 0.85rem;
}
.brand {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(1.35rem, 1.1rem + 1vw, 1.85rem);
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
  display: inline-flex; align-items: center; gap: 0.55rem;
}
.brand__clef {
  width: 1.35rem; height: 1.7rem;
  border-left: 2px solid var(--brass);
  border-right: 2px solid var(--brass);
  position: relative;
}
.brand__clef::after {
  content: "";
  position: absolute;
  left: -0.15rem; right: -0.15rem; top: 42%;
  height: 2px; background: var(--burgundy);
}
.nav {
  display: flex; flex-wrap: wrap; gap: 0.35rem 1.1rem;
  padding-block: 0 0.85rem;
  font-size: 0.92rem;
}
.nav a {
  color: var(--ink-soft); text-decoration: none;
  border-bottom: 1px solid transparent;
}
.nav a:hover, .nav a[aria-current="page"] {
  color: var(--burgundy);
  border-bottom-color: var(--brass);
}

.hero {
  min-height: min(88vh, 52rem);
  display: grid;
  align-content: end;
  padding-block: clamp(3rem, 10vw, 7rem) var(--band);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, rgba(107, 45, 60, 0.12) 0%, transparent 42%),
    repeating-linear-gradient(
      180deg,
      transparent 0,
      transparent 34px,
      rgba(166, 124, 45, 0.18) 34px,
      rgba(166, 124, 45, 0.18) 35px
    );
  pointer-events: none;
}
.hero__inner { position: relative; z-index: 1; max-width: 40rem; }
.hero__brand {
  font-family: var(--display);
  font-size: clamp(2.8rem, 2rem + 4vw, 5rem);
  line-height: 0.95;
  margin: 0 0 0.75rem;
  color: var(--ink);
}
.hero h1 {
  font-family: var(--text);
  font-weight: 600;
  font-size: clamp(1.15rem, 1rem + 0.55vw, 1.45rem);
  line-height: 1.35;
  margin: 0 0 0.85rem;
  color: var(--ink-soft);
  max-width: 34rem;
}
.hero__stand {
  margin: 0;
  font-size: 1.02rem;
  color: var(--ink-soft);
  max-width: 32rem;
}
.hero__cue {
  display: inline-flex; gap: 0.65rem; align-items: center;
  margin-bottom: 1.1rem;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--burgundy);
}
.hero__cue::before {
  content: "";
  width: 1.6rem; height: 1px; background: var(--brass);
}

.block { padding-block: var(--band); }
.block--tint {
  background: color-mix(in srgb, var(--burgundy) 6%, var(--paper));
  border-block: 1px solid var(--rule);
}
.eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brass);
  margin: 0 0 0.45rem;
}
.block h2 {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(1.6rem, 1.3rem + 1.2vw, 2.35rem);
  margin: 0 0 1rem;
  line-height: 1.15;
}

.parts {
  display: grid;
  gap: 1.25rem;
}
.part {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 1rem;
  padding: 1.1rem 0;
  border-top: 1px solid var(--rule);
}
.part:last-child { border-bottom: 1px solid var(--rule); }
.part__no {
  font-family: var(--display);
  font-size: 1.6rem;
  color: var(--burgundy);
  line-height: 1;
}
.part h3 {
  font-family: var(--display);
  font-size: 1.25rem;
  margin: 0 0 0.35rem;
  font-weight: 600;
}
.part h3 a { color: inherit; text-decoration: none; }
.part h3 a:hover { color: var(--burgundy); }
.part p { margin: 0; color: var(--ink-soft); }

.standards {
  margin: 0; padding-left: 1.15rem;
  color: var(--ink-soft);
}
.standards li { margin-bottom: 0.65rem; }
.standards strong { color: var(--ink); }

.prose { max-width: 40rem; }
.prose h1 {
  font-family: var(--display);
  font-size: clamp(1.8rem, 1.4rem + 1.5vw, 2.6rem);
  line-height: 1.12;
  margin: 0 0 0.65rem;
}
.prose h2 {
  font-family: var(--display);
  font-size: 1.35rem;
  margin: 1.6rem 0 0.55rem;
}
.prose p, .prose li { color: var(--ink-soft); }
.prose a { color: var(--burgundy); }
.article__meta {
  font-size: 0.92rem;
  color: var(--stave);
  margin: 0 0 1.5rem;
}
.article__head { padding-block: clamp(2rem, 5vw, 3.2rem) 0.5rem; }
.panel { padding-bottom: var(--band); }

.colophon {
  border-top: 1px solid var(--rule);
  padding-block: 1.6rem 2.2rem;
  background: color-mix(in srgb, var(--ink) 4%, var(--paper));
}
.colophon__nav {
  display: flex; flex-wrap: wrap; gap: 0.5rem 1rem;
  margin-bottom: 0.85rem;
}
.colophon__nav a {
  color: var(--ink-soft); text-decoration: none; font-size: 0.9rem;
}
.colophon__nav a:hover { color: var(--burgundy); }
.colophon__note {
  margin: 0;
  font-size: 0.86rem;
  color: var(--stave);
}

.backlink {
  display: inline-block;
  margin-top: 1.5rem;
  color: var(--burgundy);
  text-decoration: none;
  border-bottom: 1px solid var(--brass);
}

@media (max-width: 640px) {
  .part { grid-template-columns: 3rem 1fr; }
  .top__row { flex-direction: column; align-items: flex-start; }
}