.rcc-page {
  --tb-ink: #1d2733;
  --tb-muted: #667381;
  --tb-line: #d8e0e8;
  --tb-bg: #f6f8fa;
  --tb-panel: #ffffff;
  --tb-primary: #0f72b8;
  --tb-primary-strong: #09598f;
  --tb-accent: #f4b740;
  --tb-good: #287d55;
  --tb-warn: #a45b00;
  --tb-radius: 8px;
  --tb-shadow: 0 14px 34px rgba(29, 39, 51, 0.1);
  color-scheme: light;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--tb-ink);
  line-height: 1.65;
  min-height: 100vh;
  background: var(--tb-bg);
}

.rcc-page,
.rcc-page *,
.rcc-page *::before,
.rcc-page *::after {
  box-sizing: border-box;
}

.rcc-page .rcc-tool {
  max-width: 1120px;
  margin: 0 auto;
  padding: 22px 16px 36px;
}

.rcc-page .rcc-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  color: var(--tb-muted);
  font-size: 0.88rem;
  font-weight: 700;
}

.rcc-page .rcc-breadcrumb a {
  color: var(--tb-primary-strong);
  text-decoration: none;
}

.rcc-page .rcc-breadcrumb a:hover,
.rcc-page .rcc-breadcrumb a:focus-visible {
  text-decoration: underline;
  outline: none;
}

.rcc-page .rcc-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
  border-bottom: 3px solid var(--tb-primary);
  padding-bottom: 10px;
}

.rcc-page .rcc-heading-copy {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.rcc-page .rcc-eyebrow {
  color: var(--tb-primary-strong);
  font-size: 0.88rem;
  font-weight: 900;
}

.rcc-page .rcc-heading h1 {
  margin: 0;
  font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  line-height: 1.25;
  letter-spacing: 0;
}

.rcc-page .rcc-lead {
  max-width: 760px;
  margin: 0;
  color: var(--tb-muted);
  font-size: 0.98rem;
  font-weight: 700;
}

.rcc-page .rcc-badge {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 4px 12px;
  border: 1px solid #f0d08d;
  border-radius: 999px;
  background: #fff8e6;
  color: #694500;
  font-size: 0.88rem;
  font-weight: 700;
  white-space: nowrap;
}

.rcc-page .rcc-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin: 18px 0 14px;
}

.rcc-page .rcc-tab {
  min-height: 44px;
  border: 1px solid var(--tb-line);
  border-radius: var(--tb-radius);
  background: var(--tb-panel);
  color: var(--tb-ink);
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  transition: border-color 0.18s ease, background 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}

.rcc-page .rcc-tab:hover,
.rcc-page .rcc-tab:focus-visible {
  border-color: var(--tb-primary);
  box-shadow: 0 0 0 3px rgba(15, 114, 184, 0.14);
  outline: none;
}

.rcc-page .rcc-tab[aria-selected="true"] {
  border-color: var(--tb-primary);
  background: var(--tb-primary);
  color: #fff;
}

.rcc-page .rcc-panel {
  display: none;
  border: 1px solid var(--tb-line);
  border-radius: var(--tb-radius);
  background: var(--tb-panel);
  box-shadow: var(--tb-shadow);
  overflow: hidden;
}

.rcc-page .rcc-panel.is-active {
  display: block;
}

.rcc-page .rcc-workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 0;
}

.rcc-page .rcc-visual {
  padding: 26px clamp(16px, 3.5vw, 34px);
  background:
    linear-gradient(135deg, rgba(15, 114, 184, 0.08), transparent 42%),
    linear-gradient(180deg, #ffffff, #f1f7fb);
  border-right: 1px solid var(--tb-line);
}

.rcc-page .rcc-svg-wrap {
  min-height: 220px;
  display: grid;
  place-items: center;
}

.rcc-page .rcc-resistor-svg {
  width: min(100%, 680px);
  height: auto;
  display: block;
}

.rcc-page .rcc-band-touch {
  cursor: pointer;
  transition: filter 0.16s ease, stroke-width 0.16s ease;
}

.rcc-page .rcc-band-touch:hover,
.rcc-page .rcc-band-touch:focus-visible {
  filter: brightness(1.08);
  outline: none;
  stroke-width: 4;
}

.rcc-page .rcc-band-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
  padding: 10px;
  border: 1px solid #c9dbe9;
  border-radius: var(--tb-radius);
  background: #ffffff;
}

.rcc-page .rcc-band-picker[hidden] {
  display: none;
}

.rcc-page .rcc-picker-button {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 36px;
  padding: 6px 10px;
  border: 1px solid var(--tb-line);
  border-radius: 999px;
  background: #f9fbfd;
  color: var(--tb-ink);
  cursor: pointer;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 800;
}

.rcc-page .rcc-picker-button:hover,
.rcc-page .rcc-picker-button:focus-visible {
  border-color: var(--tb-primary);
  box-shadow: 0 0 0 3px rgba(15, 114, 184, 0.14);
  outline: none;
}

.rcc-page .rcc-result {
  display: grid;
  gap: 8px;
  margin-top: 16px;
  padding: 16px;
  border: 1px solid #c9dbe9;
  border-radius: var(--tb-radius);
  background: #ffffff;
}

.rcc-page .rcc-result-label {
  color: var(--tb-muted);
  font-size: 0.88rem;
  font-weight: 700;
}

.rcc-page .rcc-result-value {
  font-size: clamp(1.45rem, 3.5vw, 2.3rem);
  line-height: 1.1;
  font-weight: 900;
  color: var(--tb-primary-strong);
  overflow-wrap: anywhere;
}

.rcc-page .rcc-unit-symbol {
  font-family: Arial, Helvetica, sans-serif;
  font-weight: 900;
}

.rcc-page .rcc-band-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}

.rcc-page .rcc-band-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 30px;
  padding: 4px 10px;
  border: 1px solid var(--tb-line);
  border-radius: 999px;
  background: #f9fbfd;
  color: #334250;
  font-size: 0.9rem;
  font-weight: 700;
}

.rcc-page .rcc-swatch {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  border: 1px solid rgba(29, 39, 51, 0.28);
  border-radius: 50%;
  background: var(--swatch, #fff);
}

.rcc-page .rcc-controls {
  display: grid;
  gap: 16px;
  align-content: start;
  padding: 24px clamp(16px, 3vw, 28px);
}

.rcc-page .rcc-fieldset {
  margin: 0;
  padding: 0;
  border: 0;
  display: grid;
  gap: 12px;
}

.rcc-page .rcc-fieldset legend {
  margin-bottom: 2px;
  color: var(--tb-ink);
  font-size: 1rem;
  font-weight: 900;
}

.rcc-page .rcc-select-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.rcc-page .rcc-field {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.rcc-page .rcc-field label,
.rcc-page .rcc-field-label {
  color: var(--tb-muted);
  font-size: 0.88rem;
  font-weight: 800;
}

.rcc-page .rcc-select-row,
.rcc-page .rcc-input-row {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  align-items: center;
  gap: 8px;
}

.rcc-page .rcc-input-row {
  grid-template-columns: minmax(0, 1fr) 92px;
}

.rcc-page .rcc-field select,
.rcc-page .rcc-field input[type="number"] {
  width: 100%;
  min-height: 42px;
  border: 1px solid #bfcbd7;
  border-radius: var(--tb-radius);
  background: #fff;
  color: var(--tb-ink);
  font: inherit;
  font-weight: 700;
  padding: 8px 10px;
}

.rcc-page .rcc-field select:focus,
.rcc-page .rcc-field input[type="number"]:focus {
  border-color: var(--tb-primary);
  box-shadow: 0 0 0 3px rgba(15, 114, 184, 0.14);
  outline: none;
}

.rcc-page .rcc-segmented {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 1px solid var(--tb-line);
  border-radius: var(--tb-radius);
  overflow: hidden;
  background: #eef4f8;
}

.rcc-page .rcc-segmented label {
  display: grid;
  place-items: center;
  position: relative;
  min-height: 42px;
  cursor: pointer;
  color: #40505e;
  font-weight: 900;
}

.rcc-page .rcc-segmented input {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  opacity: 0;
}

.rcc-page .rcc-segmented span {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  padding: 7px 10px;
  text-align: center;
}

.rcc-page .rcc-segmented input:checked + span {
  background: var(--tb-primary);
  color: #fff;
}

.rcc-page .rcc-note {
  margin: 0;
  padding: 10px 12px;
  border-left: 4px solid var(--tb-good);
  border-radius: 0 var(--tb-radius) var(--tb-radius) 0;
  background: #eef9f3;
  color: #255b43;
  font-size: 0.92rem;
  font-weight: 700;
}

.rcc-page .rcc-note.is-warning {
  border-left-color: var(--tb-warn);
  background: #fff6e8;
  color: #724200;
}

.rcc-page .rcc-reference {
  margin-top: 18px;
  border: 1px solid var(--tb-line);
  border-radius: var(--tb-radius);
  background: var(--tb-panel);
  overflow: hidden;
}

.rcc-page .rcc-reference summary {
  cursor: pointer;
  padding: 13px 16px;
  color: var(--tb-ink);
  font-weight: 900;
}

.rcc-page .rcc-reference-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.rcc-page .rcc-reference-table th,
.rcc-page .rcc-reference-table td {
  padding: 9px 10px;
  border-top: 1px solid var(--tb-line);
  text-align: left;
  vertical-align: middle;
}

.rcc-page .rcc-reference-table th {
  background: #f0f5f9;
  font-size: 0.82rem;
  color: #4a5967;
}

.rcc-page .rcc-color-name {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
}

.rcc-page .rcc-ad {
  margin: 20px 0;
  padding: 14px;
  border: 1px dashed #bfcbd7;
  border-radius: var(--tb-radius);
  background: #ffffff;
}

.rcc-page .rcc-card {
  margin-top: 18px;
  padding: clamp(16px, 3vw, 24px);
  border: 1px solid var(--tb-line);
  border-radius: var(--tb-radius);
  background: var(--tb-panel);
  box-shadow: 0 8px 22px rgba(29, 39, 51, 0.06);
}

.rcc-page .rcc-card h2 {
  margin: 0 0 14px;
  color: var(--tb-ink);
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  line-height: 1.35;
}

.rcc-page .rcc-step-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: rcc-step;
}

.rcc-page .rcc-step-item {
  position: relative;
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--tb-line);
  border-radius: var(--tb-radius);
  background: #f9fbfd;
  counter-increment: rcc-step;
}

.rcc-page .rcc-step-item::before {
  content: counter(rcc-step);
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  margin-bottom: 10px;
  border-radius: 50%;
  background: var(--tb-primary);
  color: #fff;
  font-weight: 900;
}

.rcc-page .rcc-step-item h3 {
  margin: 0 0 8px;
  color: var(--tb-ink);
  font-size: 1rem;
  line-height: 1.45;
}

.rcc-page .rcc-step-item p {
  margin: 0;
  color: #40505e;
  font-size: 0.92rem;
}

.rcc-page .rcc-faq-list {
  display: grid;
  gap: 10px;
}

.rcc-page .rcc-faq-item {
  border: 1px solid var(--tb-line);
  border-radius: var(--tb-radius);
  background: #ffffff;
  overflow: hidden;
}

.rcc-page .rcc-faq-item summary {
  cursor: pointer;
  padding: 13px 14px;
  color: var(--tb-ink);
  font-weight: 900;
}

.rcc-page .rcc-faq-item p {
  margin: 0;
  padding: 0 14px 14px;
  color: #40505e;
}

.rcc-page .rcc-related-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.rcc-page .rcc-related-item {
  display: grid;
  gap: 6px;
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--tb-line);
  border-radius: var(--tb-radius);
  background: #f9fbfd;
  color: var(--tb-ink);
  text-decoration: none;
}

.rcc-page .rcc-related-item:hover,
.rcc-page .rcc-related-item:focus-visible {
  border-color: var(--tb-primary);
  box-shadow: 0 0 0 3px rgba(15, 114, 184, 0.14);
  outline: none;
}

.rcc-page .rcc-related-title {
  color: var(--tb-primary-strong);
  font-weight: 900;
  line-height: 1.45;
}

.rcc-page .rcc-related-desc {
  color: var(--tb-muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.rcc-page .rcc-footer {
  border-top: 1px solid var(--tb-line);
  padding: 18px 16px 26px;
  color: var(--tb-muted);
  text-align: center;
  font-size: 0.88rem;
  font-weight: 700;
}

.rcc-page .rcc-footer p {
  margin: 0;
}

.rcc-page .rcc-footer a {
  color: var(--tb-primary-strong);
  text-decoration: none;
}

.rcc-page .rcc-footer a:hover,
.rcc-page .rcc-footer a:focus-visible {
  text-decoration: underline;
  outline: none;
}

@media (max-width: 820px) {
  .rcc-page .rcc-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .rcc-page .rcc-workspace {
    grid-template-columns: 1fr;
  }

  .rcc-page .rcc-visual {
    border-right: 0;
    border-bottom: 1px solid var(--tb-line);
  }

  .rcc-page .rcc-step-list,
  .rcc-page .rcc-related-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .rcc-page .rcc-tool {
    padding-inline: 10px;
  }

  .rcc-page .rcc-tabs,
  .rcc-page .rcc-select-grid {
    grid-template-columns: 1fr;
  }

  .rcc-page .rcc-result,
  .rcc-page .rcc-controls {
    padding: 14px;
  }

  .rcc-page .rcc-svg-wrap {
    min-height: 170px;
  }

  .rcc-page .rcc-reference {
    overflow-x: auto;
  }

  .rcc-page .rcc-card {
    padding: 14px;
  }
}