/* Interactive UI Components, Bit Toggles, Tables, Controls */

/* Bit Toggle Switch Widget */
.bit-word-control {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  background: var(--bg-input);
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.bit-word-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.bit-word-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  font-family: var(--font-display);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.bit-word-readout {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-primary);
  background: rgba(0, 240, 255, 0.08);
  padding: 2px 8px;
  border-radius: 4px;
}

.bits-row {
  display: flex;
  gap: 0.45rem;
  justify-content: space-between;
}

.bit-btn {
  flex: 1;
  background: #0f172a;
  border: 1px solid #334155;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  padding: 0.6rem 0.2rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  user-select: none;
  position: relative;
}

.bit-btn span.sub {
  font-size: 0.65rem;
  color: #64748b;
  text-transform: uppercase;
  font-weight: 600;
}

.bit-btn:hover {
  border-color: #64748b;
  transform: translateY(-2px);
}

.bit-btn.active {
  background: #082f49;
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: 0 0 14px rgba(0, 240, 255, 0.35), inset 0 0 10px rgba(0, 240, 255, 0.15);
}

.bit-btn.active span.sub {
  color: var(--color-primary-dim);
}

/* Arithmetic Amber style bit button */
.bit-btn.active.amber {
  background: #3b2a05;
  border-color: var(--color-arithmetic);
  color: var(--color-arithmetic);
  box-shadow: 0 0 14px rgba(255, 183, 3, 0.35);
}

/* Single Pin Toggle Switch */
.pin-toggle-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s;
  user-select: none;
}

.pin-toggle-pill:hover {
  border-color: var(--text-dim);
}

.pin-toggle-pill.active {
  border-color: var(--color-primary);
  background: rgba(0, 240, 255, 0.1);
}

.pin-toggle-pill .state-indicator {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #1e293b;
  color: #64748b;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  transition: all 0.2s;
}

.pin-toggle-pill.active .state-indicator {
  background: var(--color-primary);
  color: #000;
  box-shadow: 0 0 8px var(--color-primary);
}

/* Master ALU Dashboard Box */
.alu-master-workbench {
  background: linear-gradient(180deg, #0e162a 0%, #090e1c 100%);
  border: 1px solid rgba(0, 240, 255, 0.25);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 240, 255, 0.05);
  margin-bottom: 3rem;
}

.workbench-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.workbench-title-group h3 {
  font-size: 1.5rem;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.workbench-controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

/* Segmented Control / Select Tabs */
.segmented-control {
  display: flex;
  background: #090e1b;
  padding: 4px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  gap: 4px;
}

.seg-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.55rem 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}

.seg-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
}

.seg-btn.active {
  background: var(--color-primary);
  color: #000;
  font-weight: 700;
  box-shadow: 0 0 10px var(--color-primary-glow);
}

.seg-btn.active.amber {
  background: var(--color-arithmetic);
  box-shadow: 0 0 10px var(--color-arith-glow);
}

/* Status Flags Bar */
.status-flags-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  background: rgba(15, 23, 42, 0.7);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.flag-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: #111a2e;
  border: 1px solid #334155;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  transition: all 0.2s;
}

.flag-chip.active {
  border-color: var(--color-primary);
  background: rgba(0, 240, 255, 0.12);
  color: var(--color-primary);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
}

.flag-chip.active.amber {
  border-color: var(--color-arithmetic);
  background: rgba(255, 183, 3, 0.12);
  color: var(--color-arithmetic);
  box-shadow: 0 0 10px rgba(255, 183, 3, 0.3);
}

/* Output Display Box */
.alu-output-card {
  background: #090e1c;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  text-align: center;
  box-shadow: 0 0 24px rgba(0, 240, 255, 0.15);
}

.alu-output-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.alu-output-val {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 4px;
}

.alu-output-sub {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color-primary);
  margin-top: 0.3rem;
}

/* Preset Chips */
.presets-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
}

.preset-chip {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: all 0.2s;
}

.preset-chip:hover {
  background: rgba(0, 240, 255, 0.1);
  color: #fff;
  border-color: var(--color-primary);
}

/* Interactive Truth Tables */
.table-wrapper {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  margin: 1rem 0;
  background: #090e1a;
}

.digital-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  text-align: center;
}

.digital-table th {
  background: #111a2f;
  color: #cbd5e1;
  padding: 0.75rem 0.6rem;
  font-weight: 700;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.8rem;
  letter-spacing: 0.5px;
}

.digital-table td {
  padding: 0.6rem 0.6rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  transition: background 0.15s, color 0.15s;
}

.digital-table tbody tr {
  cursor: pointer;
}

.digital-table tbody tr:hover td {
  background: rgba(255, 255, 255, 0.04);
  color: #fff;
}

.digital-table tbody tr.row-active td {
  background: rgba(0, 240, 255, 0.12);
  color: var(--color-primary);
  font-weight: 700;
}

.digital-table tbody tr.row-active.amber td {
  background: rgba(255, 183, 3, 0.14);
  color: var(--color-arithmetic);
}

.val-one {
  color: var(--color-primary);
  font-weight: bold;
}

.val-zero {
  color: #64748b;
}

/* Ripple Step Controller Bar */
.ripple-controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  background: #0d1527;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  margin-top: 1rem;
}

.btn-action {
  background: #1e293b;
  border: 1px solid #475569;
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s;
}

.btn-action:hover {
  background: #334155;
  border-color: #94a3b8;
}

.btn-action.primary {
  background: var(--color-primary);
  color: #000;
  border-color: var(--color-primary);
  font-weight: 700;
}

.btn-action.primary:hover {
  background: #38bdf8;
  box-shadow: 0 0 12px var(--color-primary-glow);
}

.btn-action.amber {
  background: var(--color-arithmetic);
  color: #000;
  border-color: var(--color-arithmetic);
  font-weight: 700;
}

.btn-action.amber:hover {
  background: #fbc02d;
  box-shadow: 0 0 12px var(--color-arith-glow);
}

/* Worked Example Player */
.step-walkthrough-box {
  background: #080d19;
  border: 1px solid rgba(255, 183, 3, 0.3);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-top: 1rem;
}

.step-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.step-counter {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-arithmetic);
  font-weight: 700;
}

.step-explanation {
  background: rgba(255, 183, 3, 0.05);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  color: #f1f5f9;
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

/* ==========================================================================
   Verilog Lab & EPWave Waveform Analyzer Components
   ========================================================================== */

/* Code Lab Container */
.verilog-code-lab {
  background: #090e1a;
  border: 1px solid rgba(0, 240, 255, 0.25);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 1.5rem 0 2.5rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.code-lab-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #0d1527;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
  gap: 0.75rem;
}

.code-tabs {
  display: flex;
  gap: 0.5rem;
}

.code-tab-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.code-tab-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.code-tab-btn.active {
  background: rgba(0, 240, 255, 0.12);
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

.code-actions-group {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.code-action-btn {
  background: #151f38;
  border: 1px solid #2d3b5e;
  color: #e2e8f0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s;
  text-decoration: none;
}

.code-action-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: #1a2747;
}

.code-action-btn.primary {
  background: rgba(0, 240, 255, 0.15);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.code-action-btn.primary:hover {
  background: var(--color-primary);
  color: #050c18;
  box-shadow: 0 0 12px var(--color-primary-glow);
}

.code-panel {
  display: none;
  max-height: 520px;
  overflow-y: auto;
  position: relative;
  background: #060a14;
}

.code-panel.active {
  display: block;
}

.verilog-pre {
  margin: 0;
  padding: 1.25rem 1.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.84rem;
  line-height: 1.65;
  color: #cbd5e1;
  tab-size: 4;
}

/* Verilog Syntax Highlighting */
.v-kw { color: #c084fc; font-weight: 700; }
.v-type { color: #38bdf8; }
.v-comment { color: #64748b; font-style: italic; }
.v-string { color: #34d399; }
.v-num { color: #fbbf24; font-weight: 600; }
.v-sys { color: #f43f5e; font-weight: 700; }
.v-op { color: #94a3b8; }

/* EPWave Waveform Section */
.epwave-frame {
  background: #080d1a;
  border: 1px solid rgba(0, 240, 255, 0.25);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin: 1.5rem 0 2.5rem;
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.55);
}

.epwave-header-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 1rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.epwave-title-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.epwave-badge {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 10px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}

.epwave-hud {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0.75rem;
  background: #0d1527;
  border: 1px solid var(--border-subtle);
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
  font-family: var(--font-mono);
}

.hud-item strong {
  display: block;
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 2px;
}

.hud-item span {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-primary);
}

.hud-item.amber span { color: var(--color-arithmetic); }
.hud-item.green span { color: var(--color-success); }
.hud-item.purple span { color: var(--color-logic); }

.epwave-step-chips {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 1rem;
}

.epwave-chip-label {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  font-weight: bold;
  text-transform: uppercase;
}

.epwave-step-chip {
  background: #111a2e;
  border: 1px solid #233354;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s;
}

.epwave-step-chip:hover {
  border-color: var(--color-primary);
  color: #fff;
  transform: translateY(-1px);
}

.epwave-step-chip.active {
  background: #082f49;
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
}

.epwave-step-chip.active.amber {
  background: #451a03;
  border-color: var(--color-arithmetic);
  color: var(--color-arithmetic);
  box-shadow: 0 0 10px rgba(251, 191, 36, 0.3);
}

/* EPWave Parameters Grid */
.epwave-params-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.epwave-param-card {
  background: #0a1120;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: border-color 0.2s, transform 0.2s;
}

.epwave-param-card:hover {
  border-color: rgba(0, 240, 255, 0.3);
  transform: translateY(-2px);
}

.epwave-param-icon {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}

.epwave-param-card h4 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: #ffffff;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.epwave-param-card p {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.epwave-param-tag {
  display: inline-block;
  background: rgba(0, 240, 255, 0.1);
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 2px 6px;
  border-radius: 4px;
}