.bct {
  --bct-banana: #ffc72c;
  --bct-banana-dark: #e6a800;
  --bct-ink: #1a1a1a;
  --bct-card-bg: #ffffff;
  --bct-border: #ece3cf;
  --bct-muted: #6b6b6b;
  --bct-danger: #c0392b;
  --bct-radius: 10px;

  color: var(--bct-ink);
  line-height: 1.7;
  max-width: 640px;
  margin: 0 0 24px;
}

.bct * {
  box-sizing: border-box;
}

.bct .bct-card {
  background: var(--bct-card-bg);
  border: 1px solid var(--bct-border);
  border-radius: var(--bct-radius);
  padding: 22px 22px 8px;
  margin-bottom: 22px;
}

.bct .bct-card h2 {
  font-size: 1.05rem;
  margin: 0 0 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--bct-border);
}

.bct .bct-field {
  margin-bottom: 18px;
}

.bct .bct-field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.bct .bct-hint {
  font-weight: 400;
  color: var(--bct-muted);
  font-size: 0.78rem;
  margin-left: 4px;
}

.bct .bct-input-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.bct .bct-input-row input[type="number"],
.bct .bct-input-row input[type="text"] {
  flex: 1;
  min-width: 0;
}

.bct input[type="number"],
.bct input[type="text"],
.bct select {
  width: 100%;
  padding: 10px 12px;
  font-size: 1rem;
  border: 1px solid #d9d0b8;
  border-radius: 8px;
  background: #fff;
  color: var(--bct-ink);
}

.bct input[type="number"]:focus,
.bct input[type="text"]:focus,
.bct select:focus {
  outline: none;
  border-color: var(--bct-banana-dark);
  box-shadow: 0 0 0 3px rgba(255, 199, 44, 0.35);
}

.bct .bct-unit {
  font-size: 0.88rem;
  color: var(--bct-muted);
  white-space: nowrap;
}

.bct .bct-radio-group,
.bct .bct-tab-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.bct .bct-radio-group label,
.bct .bct-tab-group button {
  flex: 1;
  text-align: center;
  border: 1px solid #d9d0b8;
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  background: #fff;
  color: var(--bct-ink);
}

.bct .bct-radio-group input {
  display: none;
}

.bct .bct-radio-group label.active,
.bct .bct-tab-group button.active {
  background: var(--bct-banana);
  border-color: var(--bct-banana-dark);
}

.bct .bct-tab-group {
  margin-bottom: 24px;
}

.bct .bct-tab-panel {
  display: none;
}

.bct .bct-tab-panel.active {
  display: block;
}

.bct .bct-result-box {
  background: #fffaf0;
  border: 1px solid var(--bct-banana);
  border-radius: var(--bct-radius);
  padding: 20px 22px;
  margin: 0 0 22px;
}

.bct .bct-result-main {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}

.bct .bct-result-main .bct-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--bct-muted);
}

.bct .bct-result-main .bct-value {
  font-size: 1.9rem;
  font-weight: 700;
}

.bct .bct-result-main .bct-value .bct-unit {
  font-size: 1rem;
  font-weight: 600;
  margin-left: 4px;
}

.bct .bct-result-sub {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px 20px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--bct-border);
}

.bct .bct-result-sub .bct-item .bct-label {
  font-size: 0.78rem;
  color: var(--bct-muted);
}

.bct .bct-result-sub .bct-item .bct-value {
  font-size: 1.05rem;
  font-weight: 700;
}

.bct .bct-note {
  font-size: 0.78rem;
  color: var(--bct-muted);
  margin-top: 18px;
}

.bct .bct-warning {
  color: var(--bct-danger);
  font-size: 0.82rem;
  margin-top: 8px;
}

.bct .bct-tool-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 14px;
}

.bct .bct-tool-list a {
  display: block;
  background: var(--bct-card-bg);
  border: 1px solid var(--bct-border);
  border-radius: var(--bct-radius);
  padding: 18px 20px;
  text-decoration: none;
  transition: border-color 0.15s, transform 0.15s;
}

.bct .bct-tool-list a:hover {
  border-color: var(--bct-banana-dark);
  transform: translateY(-1px);
}

.bct .bct-tool-list .bct-tool-name {
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 4px;
  color: var(--bct-ink);
}

.bct .bct-tool-list .bct-tool-desc {
  font-size: 0.85rem;
  color: var(--bct-muted);
}

@media (max-width: 480px) {
  .bct .bct-result-main .bct-value {
    font-size: 1.5rem;
  }
}


/* ============================================================
   ランディングページ(.bct-lp)
   ※ 計算フォームより横幅を広く使うため max-width を上書き
   ============================================================ */

.bct.bct-lp {
  max-width: 920px;
}

.bct-lp .bct-lp-lead {
  font-size: 1.02rem;
  line-height: 1.9;
  margin: 0 0 40px;
}

.bct-lp .bct-lp-h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 48px 0 22px;
  padding-left: 14px;
  border-left: 6px solid var(--bct-banana);
  line-height: 1.4;
}

.bct-lp .bct-lp-text {
  margin: 0 0 20px;
}

/* --- ツールカード --- */

.bct-lp .bct-lp-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.bct-lp .bct-lp-card {
  display: flex;
  flex-direction: column;
  background: var(--bct-card-bg);
  border: 1px solid var(--bct-border);
  border-radius: var(--bct-radius);
  padding: 24px 22px;
  transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
}

.bct-lp .bct-lp-card:hover {
  border-color: var(--bct-banana-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
}

.bct-lp .bct-lp-card__icon {
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 12px;
}

.bct-lp .bct-lp-card__title {
  font-size: 1.08rem;
  font-weight: 700;
  margin: 0 0 10px;
  line-height: 1.5;
}

.bct-lp .bct-lp-card__title a {
  color: var(--bct-ink);
  text-decoration: none;
}

.bct-lp .bct-lp-card__title a:hover {
  text-decoration: underline;
}

.bct-lp .bct-lp-card__lead {
  font-size: 0.88rem;
  color: var(--bct-muted);
  margin: 0 0 14px;
}

.bct-lp .bct-lp-card__items {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
  font-size: 0.84rem;
}

.bct-lp .bct-lp-card__items li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 7px;
  line-height: 1.6;
}

.bct-lp .bct-lp-card__items li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--bct-banana-dark);
  font-weight: 700;
}

.bct-lp .bct-lp-card__btn {
  margin-top: auto;
  display: block;
  text-align: center;
  background: var(--bct-banana);
  border: 1px solid var(--bct-banana-dark);
  border-radius: 8px;
  padding: 11px 14px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--bct-ink);
  text-decoration: none;
  transition: background-color 0.15s;
}

.bct-lp .bct-lp-card__btn:hover {
  background: var(--bct-banana-dark);
  color: var(--bct-ink);
}

/* --- 利用シーン --- */

.bct-lp .bct-lp-cases {
  display: grid;
  gap: 16px;
}

.bct-lp .bct-lp-case {
  background: #fffaf0;
  border-left: 4px solid var(--bct-banana);
  border-radius: 0 var(--bct-radius) var(--bct-radius) 0;
  padding: 18px 22px;
}

.bct-lp .bct-lp-case h3 {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 8px;
}

.bct-lp .bct-lp-case p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.85;
}

/* --- FAQ --- */

.bct-lp .bct-lp-faq {
  border: 1px solid var(--bct-border);
  border-radius: var(--bct-radius);
  overflow: hidden;
  background: var(--bct-card-bg);
}

.bct-lp .bct-lp-faq__item {
  border-bottom: 1px solid var(--bct-border);
}

.bct-lp .bct-lp-faq__item:last-child {
  border-bottom: none;
}

.bct-lp .bct-lp-faq__item > summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 46px 16px 20px;
  font-weight: 700;
  font-size: 0.94rem;
  line-height: 1.6;
  position: relative;
}

.bct-lp .bct-lp-faq__item > summary::-webkit-details-marker {
  display: none;
}

.bct-lp .bct-lp-faq__item > summary::after {
  content: "＋";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--bct-banana-dark);
  font-weight: 700;
}

.bct-lp .bct-lp-faq__item[open] > summary::after {
  content: "−";
}

.bct-lp .bct-lp-faq__item > summary:hover {
  background: #fffaf0;
}

.bct-lp .bct-lp-faq__a {
  padding: 0 20px 18px;
  font-size: 0.89rem;
  line-height: 1.85;
  color: #333;
}

/* --- CTA --- */

.bct-lp .bct-lp-cta {
  margin-top: 52px;
  background: var(--bct-ink);
  color: #fff;
  border-radius: var(--bct-radius);
  padding: 34px 30px;
  text-align: center;
}

.bct-lp .bct-lp-cta h2 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 0 12px;
  color: #fff;
}

.bct-lp .bct-lp-cta p {
  font-size: 0.9rem;
  line-height: 1.85;
  margin: 0 0 22px;
  color: rgba(255, 255, 255, 0.88);
}

.bct-lp .bct-lp-cta__btn {
  display: inline-block;
  background: var(--bct-banana);
  color: var(--bct-ink);
  font-weight: 700;
  text-decoration: none;
  padding: 13px 40px;
  border-radius: 999px;
  transition: background-color 0.15s;
}

.bct-lp .bct-lp-cta__btn:hover {
  background: #fff;
  color: var(--bct-ink);
}

@media (max-width: 600px) {
  .bct-lp .bct-lp-h2 {
    font-size: 1.18rem;
    margin-top: 40px;
  }

  .bct-lp .bct-lp-cta {
    padding: 28px 20px;
  }
}