feat(relic-substats): add interactive substats customizer with presets, roll steppers, and real-time previews

css/styles.css

@@ -3006,6 +3006,155 @@ input:checked + .slider:before {
   border-color: var(--accent-gold);
 }
 
+/* Substats Customizer */
+.slot-picker-substats-section {
+  background: rgba(15, 23, 42, 0.45);
+  border: 1px solid var(--border-color);
+  border-radius: var(--radius-sm);
+  padding: 0.85rem;
+  margin-top: 0.85rem;
+}
+
+.substat-presets-strip {
+  display: flex;
+  gap: 0.35rem;
+  flex-wrap: wrap;
+}
+
+.btn-substat-preset {
+  background: rgba(18, 24, 38, 0.8);
+  border: 1px solid var(--border-color);
+  border-radius: 6px;
+  color: var(--text-color);
+  font-size: 0.725rem;
+  font-weight: 600;
+  padding: 0.25rem 0.55rem;
+  cursor: pointer;
+  transition: all 0.15s ease;
+}
+
+.btn-substat-preset:hover {
+  border-color: var(--accent-cyan);
+  background: rgba(56, 189, 248, 0.15);
+  color: #fff;
+}
+
+.slot-picker-substats-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
+  gap: 0.65rem;
+  margin-top: 0.5rem;
+}
+
+.substat-row-card {
+  background: rgba(18, 24, 38, 0.85);
+  border: 1px solid var(--border-color);
+  border-radius: var(--radius-sm);
+  padding: 0.65rem 0.75rem;
+  display: flex;
+  flex-direction: column;
+  gap: 0.45rem;
+  transition: all 0.2s ease;
+}
+
+.substat-row-card:hover {
+  border-color: rgba(56, 189, 248, 0.4);
+}
+
+.substat-row-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  font-size: 0.75rem;
+}
+
+.substat-slot-label {
+  font-weight: 700;
+  color: var(--text-muted);
+}
+
+.substat-preview-badge {
+  font-weight: 800;
+  color: var(--accent-cyan);
+  font-family: monospace;
+  font-size: 0.825rem;
+  background: rgba(56, 189, 248, 0.12);
+  padding: 0.15rem 0.45rem;
+  border-radius: 4px;
+  border: 1px solid rgba(56, 189, 248, 0.25);
+}
+
+.substat-row-controls {
+  display: flex;
+  gap: 0.45rem;
+  align-items: center;
+}
+
+.substat-select {
+  flex: 1;
+  min-width: 0;
+  padding: 0.4rem 0.5rem;
+  font-size: 0.8rem;
+  background: rgba(10, 14, 23, 0.9);
+  border: 1px solid var(--border-color);
+  border-radius: 6px;
+  color: #fff;
+  font-weight: 600;
+  cursor: pointer;
+}
+
+.substat-select:focus {
+  border-color: var(--accent-cyan);
+  outline: none;
+}
+
+.substat-stepper {
+  display: flex;
+  align-items: center;
+  background: rgba(10, 14, 23, 0.9);
+  border: 1px solid var(--border-color);
+  border-radius: 6px;
+  overflow: hidden;
+}
+
+.btn-substat-step {
+  background: transparent;
+  border: none;
+  color: var(--text-color);
+  width: 26px;
+  height: 32px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  cursor: pointer;
+  font-size: 1rem;
+  font-weight: bold;
+  transition: background 0.15s;
+}
+
+.btn-substat-step:hover {
+  background: rgba(56, 189, 248, 0.2);
+  color: var(--accent-cyan);
+}
+
+.substat-count-input {
+  width: 32px;
+  border: none;
+  background: transparent;
+  text-align: center;
+  color: var(--accent-gold);
+  font-weight: 800;
+  font-family: monospace;
+  font-size: 0.875rem;
+  -moz-appearance: textfield;
+}
+
+.substat-count-input::-webkit-outer-spin-button,
+.substat-count-input::-webkit-inner-spin-button {
+  -webkit-appearance: none;
+  margin: 0;
+}
+
 
 /* Git Branch Indicators */
 .badge-branch {