/* ScoreForge — music engraving meets tube-amp glow.
   Palette: rosewood darks, manuscript cream, brass accent. */

:root {
  --bg0: #171210;        /* page — rosewood black */
  --bg1: #201914;        /* panel — dark walnut */
  --bg2: #2a211a;        /* raised surfaces */
  --line: #3d3128;       /* hairlines */
  --string: #55432f;     /* tab-staff strings */
  --text: #ede3cf;       /* manuscript cream */
  --muted: #a39179;      /* faded ink */
  --brass: #d9a441;      /* tube-amp amber */
  --brass-hi: #f0c36a;
  --rust: #c05b33;       /* errors only */
  --serif: "Instrument Serif", Georgia, "Times New Roman", serif;
  --sans: "Archivo", system-ui, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", Consolas, "Courier New", monospace;
}

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

html { color-scheme: dark; }

body {
  background: var(--bg0);
  background-image: radial-gradient(ellipse 80% 50% at 50% -10%, #2b2018 0%, transparent 70%);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

.masthead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 1.6rem 2rem 1.2rem;
  border-bottom: 1px solid var(--line);
}

.wordmark { display: flex; align-items: baseline; gap: 0.9rem; flex-wrap: wrap; }

.clef {
  font-size: 2.2rem;
  color: var(--brass);
  line-height: 1;
  transform: translateY(0.25rem);
}

.wordmark h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 2.4rem;
  letter-spacing: 0.01em;
}

.tagline {
  font-family: var(--serif);
  font-style: italic;
  color: var(--muted);
  font-size: 1.05rem;
}

.engine-chips { display: flex; gap: 0.5rem; flex-wrap: wrap; }

.chip {
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  white-space: nowrap;
}
.chip.on  { color: var(--brass); border-color: #6b5426; }
.chip.err { color: var(--rust);  border-color: #5c342a; }

/* ─────────────────────────── connect bar ────────────────────────────── */

.connect-bar {
  margin: 1.2rem 2rem 0;
  padding: 1rem 1.2rem;
  border: 1px dashed var(--rust);
  border-radius: 8px;
  background: #241611;
}
.connect-bar p { margin-bottom: 0.6rem; color: var(--text); }
.connect-bar code { font-family: var(--mono); color: var(--brass); }
.connect-bar form { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.connect-bar input {
  flex: 1 1 220px;
  background: var(--bg1);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.85rem;
  padding: 0.45rem 0.7rem;
}

/* ─────────────────────────────── board ──────────────────────────────── */

.board {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(300px, 380px) 1fr;
  gap: 1.6rem;
  padding: 1.6rem 2rem 2rem;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

.strip-title {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--muted);
  margin-bottom: 0.9rem;
}

.strip, .session { min-width: 0; }

/* ────────────────────────────── dropzone ────────────────────────────── */

.dropzone {
  position: relative;
  display: block;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg1);
  padding: 1.9rem 1.2rem;
  cursor: pointer;
  overflow: hidden;
  transition: border-color 120ms ease, background 120ms ease;
}
.dropzone:hover, .dropzone.drag { border-color: var(--brass); background: #241c15; }
.dropzone:focus-within { outline: 2px solid var(--brass); outline-offset: 2px; }
.dropzone input { position: absolute; opacity: 0; width: 1px; height: 1px; }

/* five faint staff lines behind the copy — manuscript paper */
.dropzone-staff {
  position: absolute; inset: 1.1rem 0.9rem;
  background: repeating-linear-gradient(
    to bottom, transparent 0 12px, var(--line) 12px 13px);
  opacity: 0.55;
  pointer-events: none;
}
.dropzone-copy { position: relative; text-align: center; }
.dropzone-copy strong {
  display: block;
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 400;
  background: var(--bg1);
  padding: 0 0.6rem;
  width: fit-content;
  margin: 0 auto;
}
.dropzone-copy span {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
  background: var(--bg1);
  width: fit-content;
  margin: 0.25rem auto 0;
  padding: 0 0.6rem;
}
.dropzone.has-file .dropzone-copy strong { color: var(--brass); }

/* ─────────────────────────────── options ────────────────────────────── */

.opt-group {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg1);
  margin-top: 1rem;
  padding: 0.9rem 1rem 1rem;
}
.opt-group legend {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  padding: 0 0.4rem;
}

.seg { display: grid; gap: 0.5rem; }
.seg label { position: relative; display: block; cursor: pointer; }
.seg input { position: absolute; opacity: 0; }
.seg span {
  display: block;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.55rem 0.8rem;
  font-weight: 500;
  transition: border-color 120ms ease, background 120ms ease;
}
.seg small { display: block; font-weight: 400; color: var(--muted); font-size: 0.78rem; }
.seg input:checked + span {
  border-color: var(--brass);
  background: #2b2113;
  box-shadow: inset 3px 0 0 var(--brass);
}
.seg input:focus-visible + span { outline: 2px solid var(--brass); outline-offset: 2px; }

.toggle {
  display: flex; align-items: flex-start; gap: 0.7rem;
  padding: 0.5rem 0.1rem; cursor: pointer;
}
.toggle input { position: absolute; opacity: 0; }
.toggle .knob {
  flex: 0 0 auto;
  width: 34px; height: 19px;
  margin-top: 2px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg2);
  position: relative;
  transition: background 120ms ease, border-color 120ms ease;
}
.toggle .knob::after {
  content: "";
  position: absolute; top: 2px; left: 2px;
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--muted);
  transition: transform 120ms ease, background 120ms ease;
}
.toggle input:checked + .knob { background: #3d2f14; border-color: var(--brass); }
.toggle input:checked + .knob::after { transform: translateX(15px); background: var(--brass); }
.toggle input:focus-visible + .knob { outline: 2px solid var(--brass); outline-offset: 2px; }
.toggle-copy small { display: block; color: var(--muted); font-size: 0.78rem; }
.toggle.disabled { opacity: 0.45; pointer-events: none; }

.numrow {
  display: flex; align-items: center; justify-content: space-between;
  gap: 0.8rem; padding: 0.5rem 0.1rem 0;
}
.numrow input {
  width: 4.2rem;
  background: var(--bg2);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  font-family: var(--mono);
  padding: 0.3rem 0.5rem;
  text-align: center;
}

/* ─────────────────────────── the forge button ───────────────────────── */

.forge-btn {
  width: 100%;
  margin-top: 1.1rem;
  padding: 0.85rem;
  font-family: var(--serif);
  font-size: 1.25rem;
  color: #1c1409;
  background: linear-gradient(180deg, var(--brass-hi), var(--brass));
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: filter 120ms ease;
}
.forge-btn:hover:not(:disabled) { filter: brightness(1.08); }
.forge-btn:focus-visible { outline: 2px solid var(--brass-hi); outline-offset: 3px; }
.forge-btn:disabled { filter: grayscale(0.7) brightness(0.6); cursor: not-allowed; }

.fineprint {
  margin-top: 0.7rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.75rem;
}

/* ──────────────── the signature: pipeline as a tab staff ────────────── */

.stave-card {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg1);
  padding: 1.1rem 1.2rem 0.9rem;
  overflow-x: auto;   /* the staff keeps its width; narrow screens scroll it */
}

.stave {
  --rows: 6;
  --rowh: 26px;
  position: relative;
  height: calc(var(--rowh) * var(--rows));
  min-width: 480px;
  /* six strings */
  background: repeating-linear-gradient(
    to bottom,
    transparent 0 calc(var(--rowh) / 2 - 1px),
    var(--string) calc(var(--rowh) / 2 - 1px) calc(var(--rowh) / 2),
    transparent calc(var(--rowh) / 2) var(--rowh));
}
.stave-scroll { overflow-x: auto; }

.stage {
  position: absolute;
  transform: translate(-50%, -50%);
  display: flex; flex-direction: column; align-items: center;
}
.stage .fret {
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 500;
  min-width: 26px; height: 26px;
  display: grid; place-items: center;
  padding: 0 6px;
  border-radius: 6px;
  border: 1px solid var(--string);
  background: var(--bg1);            /* sits ON the string, masks it */
  color: var(--muted);
  transition: all 150ms ease;
}
.stage .lbl {
  position: absolute;
  top: 100%;
  margin-top: 4px;
  font-size: 0.68rem;
  font-family: var(--mono);
  letter-spacing: 0.04em;
  color: var(--muted);
  white-space: nowrap;
}
.stage.done .fret {
  background: var(--brass);
  border-color: var(--brass);
  color: #1c1409;
}
.stage.done .lbl { color: var(--text); }
.stage.active .fret {
  border-color: var(--brass-hi);
  color: var(--brass-hi);
  animation: pluck 1.1s ease-in-out infinite;
}
.stage.active .lbl { color: var(--brass-hi); }
.stage.skipped .fret { color: var(--string); border-style: dashed; }
.stage.skipped .lbl { text-decoration: line-through; opacity: 0.6; }
.stage.error .fret { border-color: var(--rust); color: var(--rust); }

@keyframes pluck {
  0%, 100% { box-shadow: 0 0 0 0 rgba(217, 164, 65, 0); }
  50%      { box-shadow: 0 0 14px 2px rgba(217, 164, 65, 0.45); }
}

.stave-status {
  margin-top: 0.9rem;
  padding-top: 0.7rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
  min-height: 1.5em;
}
.stave-status.error { color: var(--rust); }

/* ────────────────────────────── log card ────────────────────────────── */

.log-card {
  margin-top: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #14100c;
  overflow: hidden;
}
.log-head {
  display: flex; justify-content: space-between;
  padding: 0.5rem 0.9rem;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
}
.log {
  font-family: var(--mono);
  font-size: 0.76rem;
  line-height: 1.55;
  color: #c9b795;
  padding: 0.8rem 0.9rem;
  height: 230px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.log .tag { color: var(--brass); }

/* ───────────────────────────── results card ─────────────────────────── */

.results-card {
  margin-top: 1.2rem;
  border: 1px solid #6b5426;
  border-radius: 10px;
  background: linear-gradient(180deg, #262012, var(--bg1) 55%);
  padding: 1.1rem 1.2rem 1.2rem;
}
.results-card h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.summary { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-bottom: 0.9rem; }
.summary .chip { color: var(--text); }

.downloads { display: grid; grid-template-columns: repeat(auto-fill, minmax(215px, 1fr)); gap: 0.6rem; }
.dl {
  display: block;
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg2);
  padding: 0.6rem 0.8rem;
  color: var(--text);
  transition: border-color 120ms ease;
}
.dl:hover { border-color: var(--brass); }
.dl:focus-visible { outline: 2px solid var(--brass); outline-offset: 2px; }
.dl b { display: block; font-weight: 600; font-size: 0.88rem; }
.dl small { color: var(--muted); font-family: var(--mono); font-size: 0.7rem; }

.btn-quiet {
  margin-top: 1rem;
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  padding: 0.5rem 1rem;
  font-family: var(--sans);
  font-size: 0.85rem;
  cursor: pointer;
}
.btn-quiet:hover { border-color: var(--brass); }
.btn-quiet:focus-visible { outline: 2px solid var(--brass); outline-offset: 2px; }

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

.colophon {
  padding: 1rem 2rem 1.4rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
}

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

@media (max-width: 900px) {
  .board { grid-template-columns: 1fr; }
  .masthead { padding: 1.2rem 1.2rem 1rem; }
  .board { padding: 1.2rem; }
  .connect-bar { margin: 1rem 1.2rem 0; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}