/* barva — spec-sheet chrome, barvy jsou jediná figura.
   Bílý papír = věrnost médiu: Salubra klavír se četl přes bílou kartu. */

:root {
  --paper: #fbfaf7;
  --ink: #1c1b19;
  --ink-soft: #6f6b63;
  --rule: #dcd8cd;
  --accent: #9b3738; /* 32090 rouge vermillon 31 */
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.55;
  background: var(--paper);
  color: var(--ink);
  padding: 0 clamp(16px, 4vw, 56px) 120px;
  max-width: 1180px;
  margin: 0 auto;
}

::selection { background: var(--accent); color: var(--paper); }

a { color: inherit; text-decoration: underline; text-underline-offset: 2px; }
a:hover { color: var(--accent); }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

/* ── masthead ─────────────────────────────────────── */

.masthead { padding-top: clamp(28px, 6vh, 72px); }

.masthead h1 {
  font-size: clamp(56px, 12vw, 128px);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 0.95;
  text-transform: uppercase;
}

.masthead-sub {
  margin-top: 10px;
  color: var(--ink-soft);
  max-width: 60ch;
}

.rejstrik {
  margin-top: clamp(24px, 5vh, 56px);
  border-top: 1px solid var(--ink);
}

.rejstrik-row {
  display: grid;
  grid-template-columns: 3ch 1fr auto;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  align-items: baseline;
}

.rejstrik-row .idx { color: var(--ink-soft); }
.rejstrik-row .meta { color: var(--ink-soft); text-align: right; }

.rejstrik-row.is-active:hover .sys { color: var(--accent); }
.rejstrik-row.is-planned { color: var(--ink-soft); }
.rejstrik-row.is-planned .sys { color: var(--ink-soft); }

/* ── system head ──────────────────────────────────── */

.system-head {
  margin-top: clamp(48px, 10vh, 110px);
  display: grid;
  gap: 20px;
}

.system-title h2 {
  font-size: clamp(24px, 4.5vw, 44px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.05;
}

.system-byline { color: var(--ink-soft); margin-top: 4px; }

.system-intro { max-width: 68ch; }

.system-quote {
  max-width: 52ch;
  padding-left: 14px;
  border-left: 2px solid var(--accent);
  font-style: italic;
}

.system-quote cite {
  display: block;
  margin-top: 4px;
  font-style: normal;
  color: var(--ink-soft);
  font-size: 11px;
}

/* ── toolbar ──────────────────────────────────────── */

.toolbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 48px;
  padding: 8px 0;
  background: var(--paper);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--rule);
}

.toolbar-label { color: var(--ink-soft); font-size: 11px; }

.format-toggle, .kbd-toggle, .slot-toggle { display: flex; gap: 0; }

.fmt, .kbd, .slot {
  padding: 3px 12px;
  border: 1px solid var(--ink);
  margin-left: -1px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.fmt.is-on, .kbd.is-on, .slot.is-on {
  background: var(--ink);
  color: var(--paper);
}

/* ── sections ─────────────────────────────────────── */

.collection { margin-top: clamp(48px, 8vh, 88px); }

.section-head {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 6px;
}

.section-head .idx { color: var(--accent); margin-right: 1ch; }

.section-note {
  margin-top: 10px;
  color: var(--ink-soft);
  max-width: 72ch;
  font-size: 12px;
}

/* ── series ledger ────────────────────────────────── */

.series-ledger { margin-top: 20px; }

.series-row {
  display: grid;
  grid-template-columns: minmax(120px, 170px) 1fr;
  border-bottom: 1px solid var(--rule);
  align-items: stretch;
}

.series-label {
  font-size: 11px;
  color: var(--ink-soft);
  padding: 8px 12px 8px 0;
  align-self: center;
}

.series-cells { display: flex; }

.swatch {
  flex: 1;
  min-width: 0;
  height: 76px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 6px 8px;
  text-align: left;
  transition: flex-grow 0.25s ease;
}

.swatch:hover { flex-grow: 2.2; }
.swatch:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; z-index: 2; }

.swatch .code {
  font-size: 10px;
  letter-spacing: 0.05em;
  opacity: 0.85;
}

.swatch .val {
  font-size: 10px;
  opacity: 0;
  transition: opacity 0.2s ease;
  white-space: nowrap;
  overflow: hidden;
}

.swatch:hover .val { opacity: 0.9; }

.swatch.copied .val { opacity: 1; }

.swatch.is-light { border: 1px solid var(--rule); }

/* ── murals ───────────────────────────────────────── */

.murals { margin-top: 20px; }

.mural-row {
  display: grid;
  grid-template-columns: minmax(120px, 170px) minmax(180px, 300px) 1fr;
  gap: 0 20px;
  border-bottom: 1px solid var(--rule);
  align-items: center;
}

.mural-label { padding: 8px 0; align-self: center; }
.mural-label .fr { font-weight: 600; }
.mural-label .cs { display: block; font-size: 11px; color: var(--ink-soft); }

.mural-cells { display: flex; height: 56px; }
.mural-cells .swatch { height: 100%; }

.mural-note { font-size: 11px; color: var(--ink-soft); padding: 8px 0; }

/* ── clavier ──────────────────────────────────────── */

.clavier { margin-top: 20px; }

.clavier-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  align-items: center;
}

.bigarre {
  padding: 3px 12px;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.bigarre:hover { background: var(--accent); color: var(--paper); }

.keys {
  display: flex;
  margin-top: 16px;
  height: 64px;
  border: 1px solid var(--rule);
}

.key {
  flex: 1;
  min-width: 0;
  position: relative;
  transition: flex-grow 0.2s ease;
}

.key:hover { flex-grow: 2.6; }
.key:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; z-index: 2; }

.key::after {
  content: attr(data-code);
  position: absolute;
  left: 4px;
  bottom: 4px;
  font-size: 9px;
  color: #fff;
  mix-blend-mode: difference;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.key:hover::after { opacity: 1; }

.key.is-fond::before, .key.is-ton::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--ink);
}

.key.is-ton::before { background: var(--accent); }

.chord {
  display: grid;
  grid-template-columns: 1fr minmax(200px, 280px);
  gap: 24px;
  margin-top: 20px;
}

.chord-wall {
  display: flex;
  flex-direction: column;
  height: 340px;
  border: 1px solid var(--rule);
}

.chord-band {
  position: relative;
  width: 100%;
  display: block;
  text-align: left;
}

.chord-band .band-tag {
  position: absolute;
  left: 10px;
  top: 8px;
  font-size: 10px;
  color: #fff;
  mix-blend-mode: difference;
  letter-spacing: 0.05em;
}

.chord-legend { font-size: 12px; align-self: center; }

.chord-legend dt {
  text-transform: uppercase;
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  margin-top: 12px;
}

.chord-legend dd { margin: 2px 0 0; }
.chord-legend .pct { color: var(--ink-soft); }

/* ── colophon ─────────────────────────────────────── */

.colophon {
  margin-top: clamp(64px, 10vh, 120px);
  border-top: 1px solid var(--ink);
  padding-top: 16px;
  color: var(--ink-soft);
  font-size: 11px;
}

.colophon p { max-width: 80ch; }

.sources { list-style: none; margin-top: 12px; }
.sources li { padding: 2px 0; }

.sig { margin-top: 24px; color: var(--ink); }

/* ── karta (detail) ───────────────────────────────── */

.karta {
  position: fixed;
  right: clamp(12px, 2vw, 28px);
  bottom: clamp(12px, 2vw, 28px);
  width: min(340px, calc(100vw - 24px));
  background: var(--paper);
  border: 1px solid var(--ink);
  z-index: 40;
}

.karta-close {
  position: absolute;
  top: 4px;
  right: 8px;
  font-size: 16px;
  color: #fff;
  mix-blend-mode: difference;
  z-index: 2;
}

.karta-field { height: 110px; }

.karta-data { padding: 12px 14px 14px; }

.karta-code { font-size: 15px; font-weight: 600; letter-spacing: 0.02em; }
.karta-name { color: var(--ink-soft); margin-bottom: 8px; }

.karta-dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1px 14px;
  font-size: 11px;
  border-top: 1px solid var(--rule);
  padding-top: 8px;
}

.karta-dl dt { color: var(--ink-soft); text-transform: uppercase; letter-spacing: 0.06em; font-size: 10px; }
.karta-dl dd { text-align: right; }

.karta-desc {
  font-size: 11px;
  font-style: italic;
  color: var(--ink-soft);
  margin-top: 10px;
}

.karta-actions { display: flex; gap: 0; margin-top: 12px; }

.copy-btn {
  flex: 1;
  padding: 6px 8px;
  border: 1px solid var(--ink);
  margin-left: -1px;
  font-size: 11px;
}

.copy-btn:first-child { margin-left: 0; }
.copy-btn:hover { background: var(--ink); color: var(--paper); }

/* ── toast ────────────────────────────────────────── */

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 12px);
  background: var(--ink);
  color: var(--paper);
  padding: 6px 16px;
  font-size: 12px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 50;
}

.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ── responsive ───────────────────────────────────── */

@media (max-width: 720px) {
  .series-row, .mural-row { grid-template-columns: 1fr; }
  .series-label, .mural-label { padding: 8px 0 4px; }
  .mural-note { padding-top: 4px; }
  .chord { grid-template-columns: 1fr; }
  .keys { flex-wrap: wrap; height: auto; }
  .key { flex: 0 0 calc(100% / 11); height: 44px; }
  .masthead h1 { font-size: clamp(48px, 18vw, 96px); }
}

@media (prefers-reduced-motion: reduce) {
  .swatch, .key, .toast { transition: none; }
  html { scroll-behavior: auto; }
}