/* Benny Greb alphabet trainer */

.alpha-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 1.5rem;
  align-items: start;
}

@media (max-width: 960px) {
  .alpha-layout {
    grid-template-columns: 1fr;
  }
}

.alpha-stage {
  text-align: center;
  padding: 1.25rem 1rem 1.5rem;
}

.alpha-letter-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-end;
  gap: 0.75rem 1.25rem;
  min-height: 7.5rem;
  margin-bottom: 1rem;
}

.alpha-current {
  font-size: clamp(4.5rem, 14vw, 7rem);
  font-weight: 700;
  line-height: 1;
  color: #1f4a7a;
  letter-spacing: 0.02em;
}

.alpha-next {
  display: flex;
  gap: 0.45rem;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}

.alpha-next-label {
  font-size: 0.72rem;
  color: #6b7a90;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  width: 100%;
  text-align: center;
}

.alpha-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2rem;
  height: 2rem;
  padding: 0 0.45rem;
  border-radius: 10px;
  border: 1px solid #dce3ef;
  background: #f5f8fc;
  color: #3d506e;
  font-weight: 700;
  font-size: 1rem;
}

.alpha-chip.done {
  opacity: 0.35;
}

.alpha-chip.upcoming {
  background: white;
}

.alpha-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1.5rem;
  font-size: 0.88rem;
  color: #4c5b73;
  margin-bottom: 1rem;
}

.alpha-meta strong {
  color: #1f2a3f;
  font-weight: 600;
}

/* Classic Greb letter shape: ● accents · - rests */
.greb-classic {
  margin: 0 auto 1.15rem;
  max-width: 28rem;
}

.greb-classic-title {
  font-size: 0.72rem;
  font-weight: 600;
  color: #6b7a90;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.45rem;
  text-align: center;
}

.greb-classic-card {
  position: relative;
  border: 2px solid #d5deea;
  border-radius: 18px;
  background: #fff;
  padding: 1.1rem 1.25rem 0.85rem;
  box-shadow: 0 4px 14px rgba(0, 20, 40, 0.05);
}

.greb-classic-letter {
  position: absolute;
  top: 0.55rem;
  left: 0.75rem;
  font-size: 1.15rem;
  font-weight: 800;
  color: #1f2a3f;
}

.greb-classic-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1.1rem;
  min-height: 3.5rem;
  padding-top: 0.35rem;
}

.greb-slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  min-width: 2.4rem;
  transition: transform 0.12s;
}

.greb-slot.active {
  transform: translateY(-2px) scale(1.08);
}

.greb-dot {
  width: 1.55rem;
  height: 1.55rem;
  border-radius: 50%;
  background: #d1242f;
  box-shadow: 0 2px 0 rgba(120, 20, 28, 0.25);
}

.greb-dash {
  width: 1.55rem;
  height: 0.28rem;
  border-radius: 999px;
  background: #2a3548;
  margin: 0.64rem 0;
}

.greb-slot.active .greb-dot {
  box-shadow: 0 0 0 4px rgba(209, 36, 47, 0.22);
}

.greb-slot.active .greb-dash {
  background: #1f4a7a;
  box-shadow: 0 0 0 3px rgba(31, 74, 122, 0.18);
}

.greb-slot-count {
  font-size: 0.68rem;
  font-weight: 700;
  color: #8a96a8;
}

.greb-slot.active .greb-slot-count {
  color: #1f4a7a;
}

/* Stroke lane */
.stroke-board {
  margin: 0 auto 1.35rem;
  max-width: 44rem;
}

.stroke-board-title {
  font-size: 0.78rem;
  font-weight: 600;
  color: #6b7a90;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.55rem;
  text-align: center;
}

.stroke-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.65rem;
}

.stroke-cell {
  border: 2px solid #d5deea;
  border-radius: 18px;
  background: #fff;
  padding: 0.85rem 0.4rem 0.7rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  min-height: 9.5rem;
  transition: background 0.12s, border-color 0.12s, transform 0.12s, box-shadow 0.12s;
}

.stroke-cell.active {
  border-color: #1f4a7a;
  background: #e8f0fa;
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 8px 20px rgba(31, 74, 122, 0.18);
}

.stroke-hand {
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: #4c5b73;
  text-transform: uppercase;
}

.stroke-glyph {
  font-size: clamp(3.25rem, 9vw, 4.75rem);
  font-weight: 800;
  line-height: 1;
  color: #122033;
  font-family: "IBM Plex Mono", "SF Mono", ui-monospace, monospace;
  min-height: 4.75rem;
  min-width: 3.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.7);
}

/* Per-stroke contrast — easy to read while playing */
.stroke-glyph[data-stroke="full"] {
  color: #0f2f57;
  font-size: clamp(3.6rem, 10vw, 5.25rem);
  transform: scaleY(1.08);
}

.stroke-glyph[data-stroke="down"] {
  color: #1f4a7a;
}

.stroke-glyph[data-stroke="up"] {
  color: #0d6b5c;
}

.stroke-glyph[data-stroke="tap"] {
  color: #8a5a12;
}

.stroke-cell.active .stroke-glyph {
  transform: scale(1.08);
}

.stroke-cell.active .stroke-glyph[data-stroke="full"] {
  transform: scaleY(1.08) scale(1.08);
}

.stroke-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: #1f2a3f;
}

.stroke-count {
  font-size: 0.78rem;
  font-weight: 700;
  color: #6b7a90;
  background: #eef2f8;
  border-radius: 999px;
  padding: 0.12rem 0.55rem;
  margin-top: 0.1rem;
}

.stroke-cell.active .stroke-count {
  background: #1f4a7a;
  color: #fff;
}

.stroke-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.25rem;
  justify-content: center;
  margin-top: 0.85rem;
  font-size: 0.88rem;
  color: #4c5b73;
}

.stroke-legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.stroke-legend .lg {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-weight: 800;
  font-size: 1.35rem;
  color: #122033;
  min-width: 1.4rem;
  text-align: center;
}

.stroke-legend .lg[data-stroke="full"] { color: #0f2f57; }
.stroke-legend .lg[data-stroke="down"] { color: #1f4a7a; }
.stroke-legend .lg[data-stroke="up"] { color: #0d6b5c; }
.stroke-legend .lg[data-stroke="tap"] { color: #8a5a12; }

@media (max-width: 600px) {
  .stroke-cell {
    min-height: 8rem;
    padding: 0.65rem 0.25rem 0.55rem;
  }

  .stroke-glyph {
    min-height: 3.6rem;
  }
}

/* Controls */
.alpha-controls {
  display: grid;
  gap: 0.85rem;
}

.control-row {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 0.65rem;
  align-items: center;
}

@media (max-width: 500px) {
  .control-row {
    grid-template-columns: 1fr;
  }
}

.control-row label {
  font-size: 0.78rem;
  font-weight: 600;
  color: #3d506e;
}

.control-row input[type="number"],
.control-row input[type="text"],
.control-row select {
  border: 1px solid #dce3ef;
  border-radius: 10px;
  padding: 0.45rem 0.65rem;
  font-family: inherit;
  font-size: 0.85rem;
  background: white;
  width: 100%;
}

.control-row input[type="range"] {
  width: 100%;
}

.tempo-readout {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: #1f4a7a;
  min-width: 4.5rem;
}

.duration-toggle {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.duration-toggle button,
.mode-toggle button,
.hand-toggle button,
.transport button {
  border: 1px solid #dce3ef;
  background: white;
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
  font-family: inherit;
  font-size: 0.78rem;
  color: #3d506e;
  cursor: pointer;
}

.duration-toggle button.active,
.mode-toggle button.active,
.hand-toggle button.active {
  background: #1f4a7a;
  border-color: #1f4a7a;
  color: white;
  font-weight: 600;
}

.duration-toggle button:disabled,
.mode-toggle button:disabled,
.hand-toggle button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.transport {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.35rem;
}

.transport button.primary {
  background: #1f4a7a;
  border-color: #1f4a7a;
  color: white;
  font-weight: 600;
  padding: 0.5rem 1.2rem;
}

.transport button:disabled {
  opacity: 0.45;
  cursor: default;
}

.word-field.hidden,
.control-row.hidden,
.hidden {
  display: none !important;
}

/* Chart */
.letter-chart {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(9.5rem, 1fr));
  gap: 0.45rem;
}

.letter-card {
  border: 1px solid #e9edf4;
  border-radius: 12px;
  padding: 0.55rem 0.6rem;
  background: #fafbfd;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.12s, background 0.12s;
}

.letter-card:hover,
.letter-card.active {
  border-color: #1f4a7a;
  background: #eaf0fa;
}

.letter-card .lc-id {
  font-size: 1.25rem;
  font-weight: 700;
  color: #1f4a7a;
}

.letter-card .lc-classic {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0.35rem 0 0.2rem;
  min-height: 0.85rem;
}

.letter-card .lc-dot {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: #d1242f;
  display: inline-block;
}

.letter-card .lc-dash {
  width: 0.7rem;
  height: 0.16rem;
  border-radius: 999px;
  background: #2a3548;
  display: inline-block;
}

.letter-card .lc-greb {
  font-size: 0.72rem;
  color: #6b7a90;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
}

.letter-card .lc-strokes {
  font-size: 0.85rem;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-weight: 700;
  color: #1f2a3f;
  margin-top: 0.25rem;
  letter-spacing: 0.08em;
}

/* Notation host */
.alpha-notation {
  margin-top: 0.5rem;
}

.alpha-notation .notation-preview-host {
  min-height: 6rem;
  border: 1px solid #e9edf4;
  border-radius: 14px;
  padding: 0.5rem;
  background: #fafbfd;
  overflow-x: auto;
}

.pulse-bar {
  height: 4px;
  border-radius: 999px;
  background: #e9edf4;
  overflow: hidden;
  margin: 0.75rem auto 0;
  max-width: 20rem;
}

.pulse-fill {
  height: 100%;
  width: 0%;
  background: #1f4a7a;
  transition: width 0.08s linear;
}