/* Singing Coach AI — interactive tool components (range test, pitch detector) */

.tool-panel {
  background: #fff;
  border: 2px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: 0 6px 0 var(--line);
  padding: clamp(1.5rem, 4vw, 2.4rem);
  max-width: 860px;
  margin: 0 auto;
}
.tool-section { padding: 2.6rem 0 0.5rem; }
.tool-note { text-align: center; font-size: 0.9rem; font-weight: 600; color: var(--muted); margin-top: 0.9rem; }

.tool-mic-row { display: flex; align-items: center; gap: 1.2rem; flex-wrap: wrap; }
.tool-mic {
  width: 76px;
  height: 76px;
  flex: 0 0 auto;
  border: 0;
  border-radius: 22px;
  background: var(--coral);
  color: #fff;
  box-shadow: 0 5px 0 var(--coral-edge);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  top: 0;
  transition: top 0.08s ease, box-shadow 0.08s ease, background 0.2s ease;
}
.tool-mic:active { top: 5px; box-shadow: 0 0 0 var(--coral-edge); }
.tool-mic.is-live { background: var(--leaf); box-shadow: 0 5px 0 var(--leaf-edge); animation: toolpulse 1.5s ease-in-out infinite; }
.tool-mic.is-live:active { box-shadow: 0 0 0 var(--leaf-edge); }
.tool-mic svg { width: 34px; height: 34px; }
@keyframes toolpulse { 50% { transform: scale(1.05); } }

.tool-note-display { min-width: 7.2ch; }
.tool-note-display b {
  display: block;
  font-size: clamp(2.6rem, 7vw, 4rem);
  font-weight: 900;
  line-height: 1;
  color: var(--sky-deep);
  letter-spacing: -0.02em;
}
.tool-note-display span { font-size: 0.9rem; font-weight: 700; color: var(--muted); }

/* Piano strip */
.piano-strip {
  position: relative;
  height: 90px;
  border: 2px solid var(--line);
  border-radius: var(--r);
  background: #fff;
  overflow: hidden;
  display: flex;
  margin-top: 1.4rem;
}
.piano-strip .key { flex: 1; border-right: 1.5px solid rgba(43, 49, 53, 0.16); background: #fff; position: relative; }
.piano-strip .key.black { background: var(--ink-strong); flex: 0.55; align-self: flex-start; height: 60%; border-radius: 0 0 4px 4px; border-right: 0; }
.piano-strip .key .lbl {
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.62rem;
  font-weight: 800;
  color: var(--muted);
}
.piano-needle {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 6px;
  border-radius: 3px;
  background: var(--coral);
  left: -10px;
  transition: left 0.09s linear;
  z-index: 2;
}
.piano-range {
  position: absolute;
  top: 0;
  bottom: 0;
  background: rgba(0, 182, 243, 0.22);
  border-inline: 3px solid var(--sky);
  left: 0;
  width: 0;
  z-index: 1;
  transition: left 0.2s ease, width 0.2s ease;
}

/* Cents meter (pitch detector) */
.cents-meter { margin-top: 1.4rem; }
.cents-track {
  position: relative;
  height: 46px;
  border: 2px solid var(--line);
  border-radius: 999px;
  background: linear-gradient(90deg, #FFE1E4 0%, #E7F9DB 38%, #E7F9DB 62%, #FFE1E4 100%);
  overflow: hidden;
}
.cents-center { position: absolute; left: 50%; top: 0; bottom: 0; width: 3px; background: var(--leaf-edge); transform: translateX(-50%); }
.cents-needle {
  position: absolute;
  top: 4px;
  bottom: 4px;
  width: 10px;
  border-radius: 6px;
  background: var(--ink-strong);
  left: calc(50% - 5px);
  transition: left 0.09s linear;
}
.cents-labels { display: flex; justify-content: space-between; font-size: 0.78rem; font-weight: 800; color: var(--muted); margin-top: 0.4rem; }

/* Range test steps + result */
.rt-steps { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin-top: 1.4rem; }
.rt-step {
  border: 2px solid var(--line);
  border-radius: var(--r);
  padding: 1.1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}
.rt-step.is-active { border-color: var(--sky); box-shadow: 0 4px 0 var(--sky-edge); }
.rt-step.is-done { border-color: var(--leaf); }
.rt-step b { font-weight: 800; font-size: 0.95rem; color: var(--ink-strong); display: block; }
.rt-step span { font-size: 0.82rem; font-weight: 700; color: var(--muted); }
.rt-step .val { font-size: 1.6rem; font-weight: 900; color: var(--sky-deep); min-width: 2.8ch; text-align: right; }

.rt-result {
  display: none;
  margin-top: 1.5rem;
  border: 2px solid var(--sky);
  border-radius: var(--r-lg);
  background: var(--sky-tint);
  padding: 1.6rem;
  text-align: center;
}
.rt-result.is-visible { display: block; }
.rt-result .range { font-size: clamp(2rem, 5vw, 2.9rem); font-weight: 900; color: var(--ink-strong); letter-spacing: -0.01em; }
.rt-result .vtype { font-size: 1.1rem; font-weight: 800; color: var(--sky-deep); margin: 0.3rem 0 0.6rem; }
.rt-result p { font-weight: 600; color: var(--ink); }
.rt-result .rt-ctas { display: flex; gap: 0.8rem; justify-content: center; flex-wrap: wrap; margin-top: 1.1rem; }

.tool-fallback { margin-top: 1.3rem; text-align: center; font-weight: 600; color: var(--muted); font-size: 0.95rem; }
.tool-fallback select {
  font: inherit;
  font-weight: 700;
  padding: 0.5rem 0.8rem;
  border: 2px solid var(--line);
  border-radius: 10px;
  background: #fff;
  margin: 0 0.3rem;
}

@media (max-width: 620px) {
  .rt-steps { grid-template-columns: minmax(0, 1fr); }
  .tool-mic-row { justify-content: center; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  .tool-mic.is-live { animation: none; }
  .piano-needle, .cents-needle { transition: none; }
}