/* Woodshed — "inside the piano": warm ebony case, aged ivory, brass hardware,
   felt-red reserved for the downbeat. Tokens per docs/DESIGN.md §4. */

@font-face {
  font-family: "Fraunces";
  src: url("/fonts/fraunces-roman.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Fraunces";
  src: url("/fonts/fraunces-italic.woff2") format("woff2");
  font-weight: 100 900;
  font-style: italic;
  font-display: swap;
}

:root {
  --ebony: #191410;
  --ebony-raised: #26201a;
  --ebony-edge: #3a3128;
  --ivory: #eee5d3;
  --ivory-dim: #a2947d;
  --brass: #c9a35c;
  --brass-bright: #e3c284;
  --felt: #b0463c;
  --serif: "Fraunces", "Didot", "Bodoni MT", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
}

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

html { color-scheme: dark; }

body {
  min-height: 100dvh;
  background:
    radial-gradient(120% 60% at 50% -10%, #2a2118 0%, transparent 60%),
    var(--ebony);
  color: var(--ivory);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: clamp(1rem, 3vh, 2rem) 1rem 3rem;
}

:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- shell ---------- */

.shell-header { text-align: center; margin-bottom: clamp(0.75rem, 3vh, 2rem); }

.wordmark {
  font-family: var(--serif);
  font-optical-sizing: auto;
  font-weight: 550;
  font-size: 1.75rem;
  letter-spacing: 0.01em;
  color: var(--ivory);
}

.tagline {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--ivory-dim);
  margin-top: 0.15rem;
}

.tool-tabs { display: flex; gap: 0.5rem; justify-content: center; margin-top: 1rem; }
.tool-tabs button {
  font: 500 0.85rem var(--sans);
  color: var(--ivory-dim);
  background: transparent;
  border: 1px solid var(--ebony-edge);
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
  cursor: pointer;
}
.tool-tabs button[aria-selected="true"] { color: var(--brass); border-color: var(--brass); }

.noscript { color: var(--ivory-dim); text-align: center; max-width: 26rem; }

#tool-root { margin-block: auto; width: 100%; display: flex; justify-content: center; }

/* ---------- metronome ---------- */

.metronome {
  width: min(100%, 26rem);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(0.9rem, 2.5vh, 1.4rem);
}

/* pendulum — the signature; angle is set from JS off the audio clock */
.pendulum { width: min(78%, 17rem); overflow: visible; }
.pendulum .arc {
  fill: none;
  stroke: var(--ebony-edge);
  stroke-width: 1.5;
  stroke-dasharray: 2 5;
  stroke-linecap: round;
}
.pendulum .arm line {
  stroke: var(--brass);
  stroke-width: 3;
  stroke-linecap: round;
}
.pendulum .bob {
  fill: var(--brass);
  transition: fill 90ms linear;
}
.pendulum .bob.down { fill: var(--felt); }
.pendulum .pivot { fill: var(--ivory-dim); }

/* beat dots */
.beat-dots { display: flex; gap: 0.7rem; flex-wrap: wrap; justify-content: center; }
.dot {
  width: 1.05rem;
  height: 1.05rem;
  border-radius: 50%;
  border: 2px solid var(--ivory-dim);
  background: transparent;
  padding: 0;
  cursor: pointer;
  transition: transform 90ms ease-out, background 90ms, border-color 90ms, opacity 90ms;
}
.dot.accent { background: var(--felt); border-color: var(--felt); }
.dot.normal { border-color: var(--ivory); }
.dot.muted { opacity: 0.3; }
.dot.now { transform: scale(1.45); }

/* tempo */
.tempo { text-align: center; }
.bpm {
  font-family: var(--serif);
  font-optical-sizing: auto;
  font-weight: 480;
  font-size: clamp(4.5rem, 24vw, 7rem);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  cursor: ns-resize;
  touch-action: none;
  user-select: none;
}
.marking {
  font-family: var(--serif);
  color: var(--ivory-dim);
  font-size: 1.1rem;
  margin-top: 0.25rem;
}
.marking em { font-style: italic; color: var(--brass); font-size: 1.25rem; }

.tempo-adjust {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
}
.nudge {
  font: 600 0.9rem var(--sans);
  color: var(--ivory);
  background: var(--ebony-raised);
  border: 1px solid var(--ebony-edge);
  border-radius: 0.5rem;
  padding: 0.45rem 0.6rem;
  min-width: 2.4rem;
  cursor: pointer;
}
.nudge:active { background: var(--ebony-edge); }

input[type="range"] { accent-color: var(--brass); flex: 1; min-width: 4rem; }
#bpm-slider { width: 8rem; }

/* parameter row */
.params {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1.4rem;
  justify-content: center;
  align-items: center;
}
.param {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ivory-dim);
}
.param select {
  font: 500 0.95rem var(--sans);
  color: var(--ivory);
  background: var(--ebony-raised);
  border: 1px solid var(--ebony-edge);
  border-radius: 0.5rem;
  padding: 0.35rem 0.5rem;
}
.segmented { display: flex; border: 1px solid var(--ebony-edge); border-radius: 0.5rem; overflow: hidden; }
.segmented button {
  font: 500 0.95rem var(--sans);
  color: var(--ivory-dim);
  background: var(--ebony-raised);
  border: none;
  padding: 0.4rem 0.7rem;
  cursor: pointer;
}
.segmented button + button { border-left: 1px solid var(--ebony-edge); }
.segmented button[aria-pressed="true"] { color: var(--ebony); background: var(--brass); }

/* transport */
.transport { display: flex; align-items: center; gap: 1rem; margin-top: 0.4rem; }
.start {
  font: 600 1.1rem var(--sans);
  letter-spacing: 0.04em;
  color: var(--ebony);
  background: linear-gradient(180deg, var(--brass-bright), var(--brass));
  border: none;
  border-radius: 999px;
  padding: 0.85rem 2.8rem;
  cursor: pointer;
  transition: filter 120ms;
}
.start:hover { filter: brightness(1.06); }
.start.running {
  background: transparent;
  border: 2px solid var(--brass);
  color: var(--brass);
  padding: calc(0.85rem - 2px) calc(2.8rem - 2px);
}
.tap {
  font: 500 0.95rem var(--sans);
  color: var(--ivory-dim);
  background: transparent;
  border: 1px solid var(--ebony-edge);
  border-radius: 999px;
  padding: 0.7rem 1.3rem;
  cursor: pointer;
}
.tap:active { color: var(--brass); border-color: var(--brass); }

@media (prefers-reduced-motion: reduce) {
  .dot, .pendulum .bob, .start { transition: none; }
}