.bead-calculator {
  max-width: 960px;
  margin: 2rem auto;
  padding: 1.5rem;
  background: #f6f4f2;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.06);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #222;
}

.bead-calculator h2 {
  margin-top: 0;
  font-size: 1.4rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.bead-calculator .bc-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1rem;
}

.bead-calculator .bc-subtitle {
  font-size: 0.9rem;
  color: #666;
}

.bead-calculator .bc-unit-selector {
  display: flex;
  gap: 0.25rem;
}

.bead-calculator .bc-unit-selector button {
  border: 1px solid #ccc;
  background: #fff;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  font-size: 0.8rem;
  cursor: pointer;
}

.bead-calculator .bc-unit-selector button.bc-active {
  border-color: #5c3b58;
  background: #5c3b58;
  color: #fff;
}

.bead-calculator .bc-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.bead-calculator .bc-tab-btn {
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  border: 1px solid #ddd;
  background: #fff;
  cursor: pointer;
  font-size: 0.85rem;
}

.bead-calculator .bc-tab-btn.bc-active {
  background: #222;
  color: #fff;
  border-color: #222;
}

.bead-calculator .bc-main {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .bead-calculator .bc-main {
    grid-template-columns: 1fr;
  }
}

.bead-calculator .bc-panel {
  background: #fff;
  border-radius: 10px;
  padding: 1rem 1.2rem;
  border: 1px solid #e3dfda;
}

.bead-calculator label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #777;
  margin-bottom: 0.25rem;
}

.bead-calculator input[type="number"],
.bead-calculator input[type="text"],
.bead-calculator select,
.bead-calculator textarea {
  width: 100%;
  box-sizing: border-box;
  padding: 0.45rem 0.55rem;
  border-radius: 6px;
  border: 1px solid #ccc;
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

.bead-calculator textarea {
  min-height: 120px;
  resize: vertical;
}

.bead-calculator .bc-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

@media (max-width: 480px) {
  .bead-calculator .bc-row {
    grid-template-columns: 1fr;
  }
}

.bead-calculator .bc-checkbox-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.5rem;
  font-size: 0.85rem;
  color: #444;
}

.bead-calculator .bc-section-title {
  font-weight: 600;
  margin-top: 0.5rem;
  margin-bottom: 0.4rem;
  font-size: 0.85rem;
}

.bead-calculator .bc-result-main {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.bead-calculator .bc-result-sub p {
  margin: 0.2rem 0;
  font-size: 0.9rem;
}

.bead-calculator .bc-note {
  font-size: 0.8rem;
  color: #666;
  margin-top: 0.4rem;
}

.bead-calculator .bc-visualizer {
  margin-top: 1rem;
  display: flex;
  align-items: center;
  gap: 2px;
  height: 32px;
  background: #f4f2ef;
  border-radius: 999px;
  padding: 4px 6px;
  overflow: hidden;
}

.bead-calculator .bc-bead {
  border-radius: 999px;
  background: #d6d1cb;
  flex: 0 0 auto;
}

.bead-calculator .bc-table-toggle {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  cursor: pointer;
  color: #5c3b58;
}

.bead-calculator table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.5rem;
  font-size: 0.8rem;
}

.bead-calculator table th,
.bead-calculator table td {
  border: 1px solid #e3dfda;
  padding: 0.25rem 0.4rem;
  text-align: right;
}

.bead-calculator table th:nth-child(1),
.bead-calculator table td:nth-child(1) {
  text-align: left;
}

.bead-calculator .bc-segment-row {
  display: grid;
  grid-template-columns: 40px 1fr 1fr auto;
  gap: 0.4rem;
  align-items: center;
  margin-bottom: 0.35rem;
}

.bead-calculator .bc-segment-row span {
  font-size: 0.8rem;
  color: #777;
}

.bead-calculator .bc-seg-btn {
  border: 1px solid #ccc;
  background: #fff;
  border-radius: 6px;
  padding: 0.25rem 0.45rem;
  font-size: 0.8rem;
  cursor: pointer;
}

.bead-calculator .bc-small-text {
  font-size: 0.8rem;
  color: #777;
}