/* ============================================================
   v1.26 page-specific styles
   I2CTarget bus + bytearray, float-accuracy bars, quadrature
   encoder dial + traces, language example picker, MCU spec cards.
   ============================================================ */

/* ===== I2CTarget Demo ===== */
.i2c-mode-toggle {
  display: inline-flex;
  background: var(--bg-tertiary);
  border-radius: 8px;
  padding: 3px;
  margin-bottom: 20px;
}
.i2c-mode-toggle button {
  padding: 8px 18px;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}
.i2c-mode-toggle button.active {
  background: var(--accent);
  color: #fff;
}

.i2c-stage {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.i2c-bus-svg {
  width: 100%;
  height: 200px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.i2c-bus-line {
  stroke: var(--text-muted);
  stroke-width: 2;
}
.i2c-bus-label {
  fill: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  text-anchor: end;
}

.i2c-mcu {
  fill: var(--bg-tertiary);
  stroke: var(--border);
  stroke-width: 2;
  rx: 6;
}
.i2c-mcu.target-mcu {
  stroke: var(--accent-green);
}
.i2c-mcu-label {
  fill: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  text-anchor: middle;
}
.i2c-mcu-sublabel {
  fill: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 10px;
  text-anchor: middle;
}
.i2c-mcu-port {
  fill: var(--accent);
  font-family: var(--font-mono);
  font-size: 10px;
  text-anchor: middle;
}

.i2c-packet-rect {
  fill: var(--accent);
  rx: 4;
}
.i2c-packet-rect.read {
  fill: var(--accent-green);
}
.i2c-packet-label {
  fill: #fff;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  text-anchor: middle;
}

.i2c-bytearray {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}
.i2c-bytearray-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-family: var(--font-mono);
}
.i2c-bytearray-grid {
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  gap: 4px;
}
.i2c-cell {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 8px 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  position: relative;
  transition: all 0.3s ease;
}
.i2c-cell .i2c-cell-idx {
  font-size: 9px;
  color: var(--text-muted);
  display: block;
  margin-bottom: 2px;
}
.i2c-cell .i2c-cell-val {
  font-weight: 700;
  color: var(--text-primary);
}
.i2c-cell.recently-written {
  background: var(--accent-green-glow);
  border-color: var(--accent-green);
  transform: scale(1.05);
}
.i2c-cell.recently-read {
  background: var(--accent-glow);
  border-color: var(--accent);
}

.i2c-controls {
  display: flex;
  gap: 12px;
  align-items: end;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.i2c-controls label {
  display: flex;
  flex-direction: column;
  font-size: 11px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  gap: 4px;
}
.i2c-controls input {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 13px;
  width: 100px;
}
.i2c-controls input:focus {
  outline: none;
  border-color: var(--accent);
}

.i2c-log {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
  max-height: 100px;
  overflow-y: auto;
  color: var(--text-secondary);
  min-height: 40px;
}
.i2c-log .log-write { color: var(--accent); }
.i2c-log .log-read  { color: var(--accent-green); }
.i2c-log .log-empty { color: var(--text-muted); font-style: italic; }

.i2c-irq-pane {
  background: var(--bg-code);
  border: 1px solid var(--accent-orange);
  border-radius: 6px;
  padding: 12px;
  margin-top: 12px;
}
.i2c-irq-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-orange);
  font-weight: 700;
  margin-bottom: 8px;
}
.i2c-irq-list {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  min-height: 40px;
  max-height: 120px;
  overflow-y: auto;
}
.i2c-irq-event {
  padding: 2px 0;
  animation: irq-flash 1.6s ease-out;
}
@keyframes irq-flash {
  0%   { background: var(--accent-orange); color: #fff; }
  100% { background: transparent; color: var(--text-secondary); }
}

/* ===== Float Accuracy Bars ===== */
.float-bars {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin: 24px 0;
}
.float-bar-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 16px;
  align-items: center;
  margin-bottom: 16px;
}
.float-bar-row:last-of-type { margin-bottom: 0; }
.float-bar-label {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
}
.float-bar-pair {
  display: grid;
  gap: 8px;
}
.float-bar-strip {
  display: grid;
  grid-template-columns: 1fr 140px;
  align-items: center;
  gap: 12px;
}
.float-bar-track {
  background: var(--bg-tertiary);
  border-radius: 6px;
  height: 16px;
  overflow: hidden;
  position: relative;
}
.float-bar-fill {
  height: 100%;
  width: 0;
  border-radius: 6px;
  transition: width 1.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.float-bar-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  white-space: nowrap;
}
.float-bar-num {
  color: var(--text-primary);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.float-bars-caption {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 16px;
  font-style: italic;
}

/* ===== Encoder Demo ===== */
.encoder-mode-toggle {
  display: inline-flex;
  background: var(--bg-tertiary);
  border-radius: 8px;
  padding: 3px;
  margin-bottom: 20px;
}
.encoder-mode-toggle button {
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}
.encoder-mode-toggle button.active {
  background: var(--accent);
  color: #fff;
}

.encoder-stage {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 24px;
  align-items: center;
  margin-bottom: 16px;
}

.encoder-dial-wrap {
  text-align: center;
}
.encoder-dial {
  width: 200px;
  height: 200px;
  cursor: grab;
  user-select: none;
  touch-action: none;
}
.encoder-dial:active { cursor: grabbing; }
.encoder-dial-bg {
  fill: var(--bg-primary);
  stroke: var(--border);
  stroke-width: 2;
}
.encoder-tick {
  stroke: var(--accent);
  stroke-width: 4;
  stroke-linecap: round;
}
.encoder-hub {
  fill: var(--accent);
}
.encoder-help {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 8px;
  font-style: italic;
}

.encoder-readout {
  display: grid;
  gap: 12px;
}
.encoder-count-card,
.encoder-direction-card {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  text-align: center;
}
.encoder-count-label,
.encoder-direction-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.encoder-count-value {
  font-family: var(--font-mono);
  font-size: 36px;
  font-weight: 800;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.encoder-direction-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent-green);
}

.encoder-traces {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  display: grid;
  gap: 4px;
}
.encoder-trace-row {
  display: grid;
  grid-template-columns: 80px 1fr;
  align-items: center;
  gap: 12px;
}
.encoder-trace-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
}
.encoder-trace-row canvas {
  width: 100%;
  height: 50px;
  display: block;
}

/* ===== Language Example Picker ===== */
.example-picker-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.example-picker-row label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  font-weight: 700;
}
.example-picker {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 13px;
  cursor: pointer;
  flex: 1;
  max-width: 360px;
}
.example-picker:focus {
  outline: none;
  border-color: var(--accent);
}

/* ===== MCU Spec Cards ===== */
.mcu-spec-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
}
.mcu-spec-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  transition: all 0.2s ease;
}
.mcu-spec-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}
.mcu-spec-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.mcu-spec-header h3 {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.3px;
}
.mcu-spec-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  background: var(--bg-tertiary);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 16px;
  text-align: center;
}
.mcu-spec-strip > div {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}
.mcu-spec-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 2px;
}
.mcu-spec-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 16px;
}
.mcu-spec-boards {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

/* ===== Responsive overrides ===== */
@media (max-width: 768px) {
  .encoder-stage { grid-template-columns: 1fr; justify-items: center; }
  .float-bar-row { grid-template-columns: 1fr; }
  .float-bar-strip { grid-template-columns: 1fr; }
  .i2c-bytearray-grid { grid-template-columns: repeat(8, 1fr); }
}