/* Fretboard Flash Cards - mobile-first styles */

.fretboard__description {
  max-width: 36rem;
  margin: 0 auto;
}

.fretboard-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0.8rem var(--spacing-md);
  background: var(--color-gray-100);
  border: 2px solid var(--color-foreground);
  border-radius: 1rem;
  margin-bottom: var(--spacing-md);
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.fretboard-card__meta {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.fretboard-card__label {
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-gray-600);
}

.fretboard-card__value {
  font-size: 1.15rem;
  line-height: 1.2;
}

.fretboard-card .fretboard-button {
  justify-self: end;
  white-space: nowrap;
}

.fretboard-visual {
  margin-bottom: var(--spacing-md);
}

.fretboard-visual__title {
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
}

.fretboard-visual__hint {
  font-size: 0.9rem;
  margin-bottom: 0.6rem;
}

.fretboard-visual__scroll {
  overflow-x: auto;
  border: 1px solid var(--color-gray-200);
  border-radius: 0.75rem;
  background: var(--color-background);
}

.fretboard-neck {
  min-width: 58rem;
  padding: 0.65rem;
}

.fretboard-neck__fret-labels {
  position: relative;
  margin-left: 2.2rem;
  margin-bottom: 0.4rem;
  height: 1rem;
}

.fretboard-neck__fret-label {
  position: absolute;
  transform: translateX(-50%);
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--color-gray-600);
}

.fretboard-neck__board-wrap {
  display: grid;
  grid-template-columns: 2rem 1fr;
  align-items: center;
}

.fretboard-neck__string-labels {
  position: relative;
  height: 12rem;
  margin-right: 0.1rem;
}

.fretboard-neck__string-label {
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  align-items: center;
  justify-content: center;
  font-size: 0.68rem;
  color: var(--color-gray-600);
  display: flex;
}

.fretboard-neck__string-label:nth-child(1) { top: 0%; }
.fretboard-neck__string-label:nth-child(2) { top: 20%; }
.fretboard-neck__string-label:nth-child(3) { top: 40%; }
.fretboard-neck__string-label:nth-child(4) { top: 60%; }
.fretboard-neck__string-label:nth-child(5) { top: 80%; }
.fretboard-neck__string-label:nth-child(6) { top: 100%; }

.fretboard-neck__board {
  position: relative;
  height: 12rem;
  border-radius: 0.6rem;
  background: linear-gradient(180deg, #bf8a5b 0%, #a96f47 100%);
  border: 1px solid #8f5a34;
  overflow: hidden;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.fretboard-neck__nut {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 0.4rem;
  background: #f4efe5;
  border-right: 1px solid #ded4c4;
}

.fretboard-neck__fret-line {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, #f0f0f0 0%, #c8c8c8 100%);
  box-shadow: 1px 0 0 rgba(0, 0, 0, 0.08);
}

.fretboard-neck__string-line {
  position: absolute;
  left: 0;
  right: 0;
  height: calc(1px + (var(--string-index) * 0.32px));
  transform: translateY(-50%);
  background: linear-gradient(90deg, #efefef 0%, #cfcfcf 100%);
  opacity: 0.95;
}

.fretboard-neck__inlay {
  position: absolute;
  top: 50%;
  width: 0.8rem;
  height: 0.8rem;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: rgba(242, 233, 215, 0.75);
}

.fretboard-neck__inlay--double::before,
.fretboard-neck__inlay--double::after {
  content: '';
  position: absolute;
  left: 50%;
  width: 0.75rem;
  height: 0.75rem;
  transform: translateX(-50%);
  border-radius: 50%;
  background: rgba(242, 233, 215, 0.75);
}

.fretboard-neck__inlay--double {
  background: transparent;
}

.fretboard-neck__inlay--double::before {
  top: -2.6rem;
}

.fretboard-neck__inlay--double::after {
  top: 1.9rem;
}

.fretboard-neck__range-mask {
  position: absolute;
  top: 0;
  bottom: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.22);
  pointer-events: none;
  z-index: 2;
}

.fretboard-neck__target {
  position: absolute;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background: #16a34a;
  border: 2px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 0 0 2px rgba(22, 163, 74, 0.3);
  transition: left 0.2s ease, top 0.2s ease;
  z-index: 5;
}

.fretboard-neck__target::after {
  content: '';
  position: absolute;
  inset: -0.35rem;
  border-radius: 50%;
  border: 1px solid rgba(22, 163, 74, 0.45);
}

.fretboard-controls {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.fretboard-control {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.fretboard-control__label {
  font-size: 0.85rem;
  font-weight: 600;
}

.fretboard-control__input {
  font-family: var(--font-family);
  font-size: 1rem;
  color: var(--color-foreground);
  background: var(--color-background);
  border: 2px solid var(--color-foreground);
  border-radius: 0.75rem;
  padding: 0.65rem 0.75rem;
}

.fretboard-control__input:focus {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-gray-200);
}

.fretboard-control__hint {
  font-size: 0.85rem;
  margin-bottom: 0;
}

.fretboard-feedback {
  margin-bottom: var(--spacing-md);
  min-height: 1.8rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-gray-600);
}

.fretboard-feedback--good {
  color: #15803d;
}

.fretboard-feedback--bad {
  color: #b91c1c;
}

.fretboard-note-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
}

.fretboard-note {
  width: 100%;
  border: 2px solid var(--color-foreground);
  background: var(--color-background);
  color: var(--color-foreground);
  border-radius: 0.75rem;
  padding: 0.8rem 0.25rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  transition: var(--transition-default);
}

.fretboard-note:hover {
  background: var(--color-foreground);
  color: var(--color-background);
}

.fretboard-note:focus {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-gray-400);
}

.fretboard-button {
  border: 2px solid var(--color-foreground);
  background: var(--color-foreground);
  color: var(--color-background);
  border-radius: var(--border-radius);
  padding: 0.6rem 1.2rem;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  transition: var(--transition-default);
}

.fretboard-button:hover {
  background: var(--color-background);
  color: var(--color-foreground);
}

.fretboard-button:focus {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-gray-400);
}

.fretboard-button--secondary {
  border-radius: 0.75rem;
  padding: 0.45rem 0.8rem;
}

.fretboard-card--correct {
  background: rgba(34, 197, 94, 0.16);
}

.fretboard-card--wrong {
  background: rgba(239, 68, 68, 0.16);
  animation: fretboard-shake 0.28s linear;
}

.fretboard-note--correct {
  background: rgba(34, 197, 94, 0.2);
  border-color: #22c55e;
}

.fretboard-note--wrong {
  background: rgba(239, 68, 68, 0.2);
  border-color: #ef4444;
}

@keyframes fretboard-shake {
  0% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  50% { transform: translateX(6px); }
  75% { transform: translateX(-4px); }
  100% { transform: translateX(0); }
}

@media (min-width: 700px) {
  .fretboard-controls {
    grid-template-columns: 1fr 1fr;
    align-items: end;
  }

  .fretboard-control__hint {
    grid-column: 1 / -1;
  }

  .fretboard-note-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .fretboard-card {
    grid-template-columns: 1fr 1fr;
  }

  .fretboard-card .fretboard-button {
    grid-column: 1 / -1;
    justify-self: end;
  }
}