:root {
  /* Typography intent: measure numbers, readable narrative copy, and the `musical.quest` wordmark. */
  --parchment: #F7EBCB;
  --honey: #C88A2D;
  --walnut: #3A2315;
  --brass: #B97818;
  --felt: #6F6A3E;
  --ink: #24170F;
  --ivory: #FFF8E4;
  --amber: #F2B84B;
  --staff: #7D8588;
  --shadow: 0 24px 70px rgba(36, 23, 15, .28);
  --inset: inset 0 2px 1px rgba(255,248,228,.65), inset 0 -3px 8px rgba(36,23,15,.28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--walnut);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  overflow-x: hidden;
}
.score-box { background: var(--walnut); }
.measure {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 24%, rgba(242,184,75,.22), transparent 24rem),
    linear-gradient(135deg, #FFF8E4 0%, var(--parchment) 46%, #ead8aa 100%);
  border-block: 1px solid rgba(58,35,21,.22);
}
.measure::before {
  content: attr(data-measure);
  position: absolute;
  left: clamp(1rem, 4vw, 4rem);
  top: clamp(1rem, 4vw, 3rem);
  font: 700 .8rem/1 "IBM Plex Mono", monospace;
  letter-spacing: .22em;
  color: rgba(36,23,15,.33);
}
.grain {
  position: absolute;
  inset: 0;
  opacity: .22;
  background-image: repeating-linear-gradient(90deg, rgba(58,35,21,.05) 0 1px, transparent 1px 9px), repeating-linear-gradient(0deg, rgba(255,248,228,.18) 0 1px, transparent 1px 7px);
}

h1, h2 { font-family: "Space Grotesk", Inter, sans-serif; margin: 0; letter-spacing: -.055em; }
h1 { font-size: clamp(3.6rem, 11vw, 11rem); line-height: .82; }
h2 { font-size: clamp(2.1rem, 5.8vw, 6.5rem); line-height: .88; }
p { font-size: clamp(1rem, 1.5vw, 1.2rem); line-height: 1.65; margin: 0; }
.mono, .serial, .corner-note { font-family: "IBM Plex Mono", ui-monospace, monospace; }

.debossed-staff, .drawer-track, .final-staff {
  position: absolute;
  height: 9rem;
  display: grid;
  grid-template-rows: repeat(5, 1px);
  gap: 1.05rem;
}
.debossed-staff i, .drawer-track i, .final-staff i {
  display: block;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(125,133,136,.55), transparent);
  box-shadow: 0 1px 0 rgba(255,248,228,.85), 0 -1px 0 rgba(36,23,15,.08);
}
.staff-a { left: 8vw; right: 8vw; top: 21vh; transform: scaleX(0); transform-origin: left; animation: staffDraw 1.3s .55s cubic-bezier(.2,.8,.2,1) forwards; }
.brass-rail {
  position: absolute;
  left: -10vw;
  top: 27vh;
  width: 120vw;
  height: 1.05rem;
  border-radius: 999px;
  background: linear-gradient(#F2B84B, #B97818 47%, #7a4b13);
  box-shadow: var(--shadow), var(--inset);
  transform: translateX(-102%);
  animation: railSlide 1.2s .18s cubic-bezier(.68,-.02,.18,1) forwards;
}
.brass-rail span { position: absolute; inset: .28rem 0 auto 0; height: 1px; background: rgba(255,248,228,.55); }
.opening-note {
  position: absolute;
  left: 62vw;
  top: calc(27vh - .7rem);
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 25%, var(--ivory), var(--amber) 34%, var(--brass) 68%, #6d3e10);
  box-shadow: 0 13px 22px rgba(36,23,15,.32), var(--inset);
  opacity: 0;
  transform: translateY(-4rem) scale(.75);
  animation: noteSnap .62s 1.35s cubic-bezier(.28,1.75,.46,.96) forwards;
}

.engraved-label {
  position: absolute;
  left: clamp(1.4rem, 9vw, 9rem);
  bottom: 16vh;
  padding: clamp(1rem, 2.5vw, 2rem) clamp(1.1rem, 3vw, 3rem);
  color: var(--ivory);
  background: linear-gradient(145deg, #56331e, var(--walnut) 55%, #211008);
  border: 1px solid rgba(255,248,228,.19);
  border-radius: 1.4rem;
  box-shadow: var(--shadow), var(--inset);
  text-shadow: 0 -1px 0 #000, 0 1px 0 rgba(255,248,228,.16);
}
.serial { margin: 0 0 .8rem; color: var(--amber); letter-spacing: .18em; font-size: .76rem; }
.winding-key {
  position: absolute;
  right: 11vw;
  bottom: 19vh;
  width: 6rem;
  height: 7rem;
  border: 0;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(242,184,75,.3), transparent 65%);
  cursor: pointer;
}
.winding-key svg { width: 100%; height: 100%; fill: none; stroke: var(--brass); stroke-width: 5; stroke-linecap: round; stroke-linejoin: round; filter: drop-shadow(0 8px 10px rgba(36,23,15,.28)); transition: transform .45s cubic-bezier(.2,1.4,.3,1); }
.winding-key.latched svg, .winding-key:hover svg { transform: rotate(42deg) scale(.96); }

.corner-note { position: absolute; top: 9vh; left: 7vw; color: var(--felt); letter-spacing: .16em; font-size: .78rem; }
.corner-note.right { left: auto; right: 7vw; }
.vast-rest { position: absolute; inset: 20vh 18vw; border-radius: 50%; border: 1px solid rgba(125,133,136,.13); }
.reveal-object { opacity: 0; transform: translateX(-7rem); transition: opacity .75s ease, transform .9s cubic-bezier(.2,.85,.25,1); }
.reveal-object.in-view { opacity: 1; transform: translateX(0); }

.roll-apparatus {
  position: absolute;
  right: 7vw;
  bottom: 10vh;
  width: min(43rem, 82vw);
  padding: 1.15rem 1.4rem;
  border-radius: 1.5rem;
  background: linear-gradient(145deg, #4b2b18, var(--walnut));
  box-shadow: var(--shadow), var(--inset);
}
.roller { height: 1.1rem; border-radius: 999px; background: linear-gradient(#F2B84B, #B97818, #6f3d0d); box-shadow: var(--inset); }
.paper-roll {
  margin: .85rem 1.5rem;
  padding: 2rem clamp(1rem, 4vw, 3rem);
  background: linear-gradient(90deg, rgba(58,35,21,.08) 0 1px, transparent 1px 2.2rem), var(--ivory);
  border-radius: .55rem;
  box-shadow: inset 0 0 28px rgba(185,120,24,.2);
}
.tab { display: inline-block; margin-bottom: 1rem; padding: .35rem .8rem; border-radius: .45rem .45rem 0 0; background: var(--honey); color: var(--walnut); font: 700 .75rem/1 "IBM Plex Mono", monospace; letter-spacing: .18em; text-transform: uppercase; box-shadow: var(--inset); }
.perforations { display: flex; gap: .8rem; margin-top: 1.4rem; }
.perforations i { width: .55rem; height: .55rem; border-radius: 50%; background: var(--parchment); box-shadow: inset 0 2px 4px rgba(58,35,21,.28); }
.screw { position: absolute; width: 1rem; height: 1rem; border-radius: 50%; background: radial-gradient(circle, var(--amber), var(--brass)); box-shadow: inset 0 1px 3px rgba(36,23,15,.5); }
.s1 { left: .9rem; top: .9rem; } .s2 { right: .9rem; top: .9rem; }
.line-art { position: absolute; fill: none; stroke: var(--ink); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; opacity: .72; }
.line-art path, .line-art circle { stroke-dasharray: 700; stroke-dashoffset: 700; transition: stroke-dashoffset 1.7s cubic-bezier(.2,.8,.2,1); }
.line-art.drawn path, .line-art.drawn circle { stroke-dashoffset: 0; }
.lyre { left: 9vw; top: 30vh; width: min(19rem, 38vw); }

.drawer-track { left: 13vw; right: 10vw; top: 34vh; }
.notation-drawer {
  position: absolute;
  left: 10vw;
  top: 40vh;
  width: min(47rem, 78vw);
  padding: 2rem;
  border-radius: 1.2rem;
  background: linear-gradient(150deg, #5b351e, var(--walnut));
  color: var(--ivory);
  box-shadow: var(--shadow), var(--inset);
}
.leather-tab { position: absolute; right: -2.4rem; top: 2rem; padding: 1rem .65rem; writing-mode: vertical-rl; border-radius: .55rem; background: #24170F; color: var(--amber); font: 700 .72rem/1 "IBM Plex Mono", monospace; letter-spacing: .15em; box-shadow: var(--shadow); }
.notation-drawer .mono { color: var(--amber); letter-spacing: .14em; font-size: .75rem; margin-bottom: 1rem; }
.bead-rail { position: relative; display: flex; justify-content: space-between; align-items: center; margin: 2rem 0 1.2rem; padding: .55rem 1rem; border-radius: 999px; background: linear-gradient(#F2B84B, #B97818 55%, #7a4b13); box-shadow: var(--inset); }
.note-bead { width: 2rem; height: 2rem; border: 0; border-radius: 50%; background: radial-gradient(circle at 30% 23%, var(--ivory), var(--amber) 38%, var(--brass) 68%); box-shadow: 0 8px 14px rgba(0,0,0,.28), var(--inset); cursor: pointer; transition: transform .32s cubic-bezier(.23,1.6,.35,1); }
.note-bead.bump { transform: translateY(-1.2rem) scale(1.08); }
.brass-plaque { position: absolute; right: 8vw; bottom: 17vh; padding: 1rem 1.4rem; border-radius: .7rem; background: linear-gradient(#F2B84B, #C88A2D 50%, #B97818); box-shadow: var(--shadow), var(--inset); font: 700 .8rem/1 "IBM Plex Mono", monospace; letter-spacing: .12em; text-transform: uppercase; transform: translateX(140%); transition: transform .7s cubic-bezier(.2,.85,.25,1); }
.brass-plaque.open { transform: translateX(0); }

.keybed { position: absolute; left: 7vw; right: 7vw; top: 24vh; display: grid; grid-template-columns: minmax(18rem, 34rem) 1fr; gap: 2rem; align-items: stretch; }
.keys { display: grid; grid-template-columns: repeat(5, 1fr); min-height: 18rem; padding: 1rem; border-radius: 1.4rem; background: linear-gradient(145deg, #432515, var(--walnut)); box-shadow: var(--shadow), var(--inset); }
.keys button { border: 1px solid rgba(58,35,21,.3); border-radius: 0 0 .75rem .75rem; background: linear-gradient(90deg, #fffdf2, var(--ivory), #ead7ad); color: var(--walnut); font: 700 .75rem/1 "IBM Plex Mono", monospace; letter-spacing: .18em; cursor: pointer; box-shadow: inset 0 -12px 20px rgba(185,120,24,.18); transition: transform .18s ease, box-shadow .18s ease; }
.keys button.pressed, .keys button:hover { transform: translateY(.7rem); box-shadow: inset 0 14px 24px rgba(58,35,21,.2); }
.felt-slot { padding: clamp(1.4rem, 4vw, 3.5rem); border-radius: 1.4rem; background: linear-gradient(145deg, #81804e, var(--felt)); color: var(--ivory); box-shadow: var(--shadow), var(--inset); }
.metronome { right: 9vw; bottom: 5vh; width: min(16rem, 34vw); stroke: var(--brass); }
.metronome.drawn .pendulum { animation: tick 1.1s ease-in-out infinite alternate; transform-origin: 100px 42px; }

.final-staff { left: 6vw; right: 6vw; top: 28vh; }
.finale-seal { position: absolute; left: 11vw; bottom: 13vh; width: min(42rem, 76vw); padding: 2rem; border-radius: 1.6rem; background: linear-gradient(150deg, var(--ivory), var(--parchment)); box-shadow: var(--shadow), inset 0 0 0 8px rgba(185,120,24,.14); }
.enamel-link { display: inline-block; margin-top: 1.4rem; padding: .85rem 1.05rem; border-radius: 999px; background: var(--walnut); color: var(--amber); text-decoration: none; font: 800 .8rem/1 Inter, sans-serif; letter-spacing: .12em; text-transform: uppercase; box-shadow: var(--inset); transition: transform .25s ease; }
.enamel-link:hover { transform: translateY(3px); }
.quest-key { position: absolute; right: 8vw; top: 36vh; width: min(23rem, 45vw); filter: drop-shadow(0 20px 24px rgba(36,23,15,.28)); }
.quest-key svg { width: 100%; fill: none; stroke: var(--brass); stroke-width: 9; stroke-linecap: round; stroke-linejoin: round; animation: keyFloat 3.8s ease-in-out infinite; }

@keyframes railSlide { to { transform: translateX(0); } }
@keyframes staffDraw { to { transform: scaleX(1); } }
@keyframes noteSnap { 70% { opacity: 1; transform: translateY(.4rem) scale(1.08); } 100% { opacity: 1; transform: translateY(0) scale(1); } }
@keyframes tick { from { transform: rotate(-10deg); } to { transform: rotate(10deg); } }
@keyframes keyFloat { 50% { transform: translateY(-.7rem) rotate(2deg); } }

@media (max-width: 800px) {
  .keybed { grid-template-columns: 1fr; top: 14vh; }
  .keys { min-height: 11rem; }
  .metronome { opacity: .25; }
  .leather-tab { right: 1rem; top: -1.2rem; writing-mode: horizontal-tb; }
  .quest-key { top: 14vh; opacity: .32; }
}