:root {
  --kac-fallback-accent: #e86f2b;
}

.kac-wrap,
.kac-nudge {
  --kac-accent: var(--kac-fallback-accent);
  --kac-accent-contrast: #fff;
  --kac-accent-soft: #fff7ee;
  --kac-accent-soft-strong: #ffead2;
  --kac-text: #333;
  --kac-muted: #666;
  --kac-surface: #fff;
  --kac-border: #e6e6e6;
  --kac-font: inherit;
  --kac-nudge-offset: 120px;
  box-sizing: border-box;
  font-family: var(--kac-font);
  color: var(--kac-text);
}

.kac-wrap *,
.kac-nudge * {
  box-sizing: border-box;
}

.kac-wrap {
  position: relative;
  width: 100%;
  margin: 2.6rem 0 1.8rem;
  padding: 1.35rem;
  background: var(--kac-surface);
  border: 1px solid var(--kac-border);
  border-top: 5px solid var(--kac-accent);
  border-radius: 8px;
  overflow: hidden;
}

.kac-badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  margin: 0 0 .65rem;
  padding: .24rem .7rem;
  border-radius: 999px;
  background: var(--kac-accent);
  color: var(--kac-accent-contrast);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .02em;
}

.kac-heading {
  margin: 0 0 .65rem !important;
  padding: 0 !important;
  border: 0 !important;
  background: transparent !important;
  color: var(--kac-text) !important;
  font-size: clamp(1.25rem, 2vw, 1.55rem) !important;
  line-height: 1.45 !important;
  font-weight: 700 !important;
}

.kac-description {
  margin: 0 0 1.15rem;
  color: var(--kac-muted);
  line-height: 1.8;
}

.kac-question-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: .65rem;
}

.kac-question-btn,
.kac-provider-btn,
.kac-toggle,
.kac-nudge-button,
.kac-nudge-close {
  font: inherit;
}

.kac-question-btn {
  appearance: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  width: 100%;
  min-height: 50px;
  padding: .82rem .95rem;
  border: 1px solid var(--kac-border);
  border-radius: 7px;
  background: #fff;
  color: var(--kac-text);
  text-align: left;
  line-height: 1.55;
  cursor: pointer;
  transition: border-color .16s ease, background-color .16s ease, transform .16s ease, box-shadow .16s ease;
}

.kac-question-btn:hover,
.kac-question-btn:focus-visible {
  border-color: var(--kac-accent);
  background: var(--kac-accent-soft);
  box-shadow: 0 3px 10px rgba(0,0,0,.06);
  outline: none;
}

.kac-question-btn.is-selected {
  border-color: var(--kac-accent);
  background: var(--kac-accent-soft-strong);
  box-shadow: inset 4px 0 0 var(--kac-accent);
  font-weight: 700;
}

.kac-arrow {
  flex: 0 0 auto;
  color: var(--kac-accent);
  font-size: 1.35em;
  line-height: 1;
}

.kac-toggle {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  margin: .85rem 0 .15rem;
  padding: .4rem 0;
  border: 0;
  background: transparent;
  color: var(--kac-accent);
  font-weight: 700;
  cursor: pointer;
}

.kac-toggle-icon {
  font-size: .72em;
  transition: transform .16s ease;
}

.kac-toggle[aria-expanded="true"] .kac-toggle-icon {
  transform: rotate(180deg);
}

.kac-question-list-extra {
  margin-top: .55rem;
}

.kac-freeform {
  margin-top: 1.1rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--kac-border);
}

.kac-label,
.kac-provider-title {
  display: block;
  margin: 0 0 .55rem;
  font-weight: 700;
}

.kac-textarea {
  display: block;
  width: 100%;
  min-height: 96px;
  padding: .8rem .9rem;
  border: 1px solid var(--kac-border);
  border-radius: 7px;
  background: #fff;
  color: var(--kac-text);
  font: inherit;
  font-size: 16px;
  line-height: 1.65;
  resize: vertical;
}

.kac-textarea:focus {
  border-color: var(--kac-accent);
  box-shadow: 0 0 0 3px var(--kac-accent-soft-strong);
  outline: none;
}

.kac-privacy-note,
.kac-external-note,
.kac-copy-status {
  margin: .5rem 0 0;
  color: var(--kac-muted);
  font-size: .82rem;
  line-height: 1.65;
}

.kac-provider-area {
  margin-top: 1.25rem;
  padding: 1rem;
  border: 1px solid var(--kac-border);
  border-radius: 7px;
  background: var(--kac-accent-soft);
}

.kac-provider-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: .65rem;
}

.kac-provider-btn {
  min-height: 50px;
  padding: .75rem 1rem;
  border: 1px solid var(--kac-accent);
  border-radius: 7px;
  background: var(--kac-accent);
  color: var(--kac-accent-contrast);
  font-weight: 700;
  cursor: pointer;
  transition: filter .16s ease, transform .16s ease, box-shadow .16s ease;
}

.kac-provider-btn:hover,
.kac-provider-btn:focus-visible {
  filter: brightness(.94);
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(0,0,0,.10);
  outline: none;
}

.kac-source-note {
  margin-top: 1.15rem;
  padding: .75rem .85rem;
  border-left: 4px solid var(--kac-accent);
  border-radius: 4px;
  background: var(--kac-accent-soft);
  font-size: .88rem;
  line-height: 1.65;
}

.kac-nudge[hidden] {
  display: none !important;
}

.kac-nudge {
  position: fixed;
  z-index: 9998;
  right: 18px;
  bottom: calc(var(--kac-nudge-offset) + env(safe-area-inset-bottom, 0px));
  width: min(360px, calc(100vw - 36px));
  padding: .9rem 1rem 1rem;
  border: 1px solid var(--kac-border);
  border-top: 4px solid var(--kac-accent);
  border-radius: 10px;
  background: linear-gradient(180deg, var(--kac-accent-soft) 0%, var(--kac-surface) 72%);
  box-shadow: 0 10px 28px rgba(0,0,0,.18), 0 0 0 1px rgba(255,255,255,.65) inset;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease;
}

.kac-nudge.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.kac-nudge-close {
  position: absolute;
  top: 7px;
  right: 7px;
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--kac-muted);
  font-size: 1.25rem;
  cursor: pointer;
}

.kac-nudge-badge {
  display: inline-flex;
  align-items: center;
  min-height: 25px;
  margin-right: 34px;
  padding: .18rem .58rem;
  border-radius: 999px;
  background: var(--kac-accent);
  color: var(--kac-accent-contrast);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .02em;
}

.kac-nudge-text {
  margin: .35rem 34px .75rem 0;
  font-weight: 700;
  line-height: 1.55;
}

.kac-nudge-button {
  width: 100%;
  min-height: 46px;
  padding: .65rem .85rem;
  border: 1px solid var(--kac-accent);
  border-radius: 7px;
  background: var(--kac-accent);
  color: var(--kac-accent-contrast);
  font-weight: 700;
  cursor: pointer;
}

/* PC: 白基調のSTORK記事内でも、テーマのアクセント色を使ってパーツとして明確に見せる。 */
@media (min-width: 783px) {
  .kac-wrap {
    margin-top: 3rem;
    padding: 1.65rem 1.75rem 1.55rem;
    border: 1px solid var(--kac-border);
    border-top: 6px solid var(--kac-accent);
    background:
      linear-gradient(180deg, var(--kac-accent-soft) 0, var(--kac-accent-soft) 112px, var(--kac-surface) 112px, var(--kac-surface) 100%);
    box-shadow: 0 5px 16px rgba(0,0,0,.08);
  }

  .kac-wrap::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 5px;
    background: var(--kac-accent);
    opacity: .72;
  }

  .kac-heading {
    padding-right: 1rem !important;
  }

  .kac-question-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .kac-question-list-extra {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .kac-provider-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .kac-question-btn {
    min-height: 58px;
    border-color: var(--kac-accent-soft-strong);
  }

  .kac-provider-area {
    padding: 1.1rem 1.15rem;
    border-color: var(--kac-accent-soft-strong);
  }

  .kac-nudge {
    right: 26px;
    bottom: var(--kac-nudge-offset);
    border-color: var(--kac-accent-soft-strong);
    border-top-width: 5px;
  }

  .kac-nudge-button {
    min-height: 50px;
    box-shadow: 0 4px 10px rgba(0,0,0,.10);
  }
}


@media (max-width: 782px) {
  .kac-wrap {
    margin: 2rem 0 1.4rem;
    padding: 1.05rem;
    border-top-width: 4px;
    border-radius: 7px;
  }

  .kac-heading {
    font-size: 1.25rem !important;
  }

  .kac-nudge {
    left: 12px;
    right: 12px;
    width: auto;
    bottom: calc(var(--kac-nudge-offset) + env(safe-area-inset-bottom, 0px));
  }
}

@media (prefers-reduced-motion: reduce) {
  .kac-question-btn,
  .kac-provider-btn,
  .kac-toggle-icon,
  .kac-nudge {
    transition: none !important;
  }
}

/* v0.5.0: AIナビ前後の任意HTML/広告スロット。AIの操作ボタンと広告を視覚的に分離する。 */
.kac-slot {
  width: 100%;
  margin: 2.25rem 0;
  clear: both;
}

.kac-slot-before {
  margin-bottom: 2.25rem;
}

.kac-slot-after {
  margin-top: 2.25rem;
}

/* v0.5.0: 契約経路入力 */
.kac-route-panel {
  margin: 0 0 1.15rem;
  border: 1px solid var(--kac-border);
  border-radius: 7px;
  background: var(--kac-accent-soft);
  overflow: hidden;
}

.kac-route-summary {
  display: block;
  position: relative;
  padding: .78rem 2.35rem .78rem .9rem;
  color: var(--kac-text);
  font-weight: 700;
  line-height: 1.5;
  cursor: pointer;
  list-style: none;
}

.kac-route-summary::-webkit-details-marker {
  display: none;
}

.kac-route-summary::after {
  content: "＋";
  position: absolute;
  right: .9rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--kac-accent);
  font-size: 1.1rem;
  font-weight: 800;
}

.kac-route-panel[open] .kac-route-summary::after {
  content: "−";
}

.kac-route-summary-sub {
  color: var(--kac-muted);
  font-size: .82em;
  font-weight: 500;
}

.kac-route-body {
  padding: 0 .9rem .9rem;
  border-top: 1px dashed var(--kac-border);
}

.kac-route-help {
  margin: .75rem 0;
  color: var(--kac-muted);
  font-size: .86rem;
  line-height: 1.65;
}

.kac-route-options {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.kac-route-btn {
  appearance: none;
  min-height: 42px;
  padding: .55rem .72rem;
  border: 1px solid var(--kac-border);
  border-radius: 999px;
  background: var(--kac-surface);
  color: var(--kac-text);
  font: inherit;
  font-size: .88rem;
  line-height: 1.35;
  cursor: pointer;
}

.kac-route-btn:hover,
.kac-route-btn:focus-visible,
.kac-route-btn.is-selected {
  border-color: var(--kac-accent);
  background: var(--kac-accent);
  color: var(--kac-accent-contrast);
  outline: none;
}

.kac-route-status {
  min-height: 1.5em;
  margin: .65rem 0 0;
  color: var(--kac-text);
  font-size: .84rem;
  font-weight: 700;
}

/* v0.5.0: カテゴリ別質問 */
.kac-extra-wrap {
  margin-top: .55rem;
}

.kac-section-label {
  margin: .85rem 0 .55rem;
  padding-left: .65rem;
  border-left: 3px solid var(--kac-accent);
  color: var(--kac-text);
  font-size: .88rem;
  font-weight: 700;
  line-height: 1.5;
}

.kac-section-label-generic {
  margin-top: 1.1rem;
}

.kac-verified {
  display: block;
  margin-top: .3rem;
  color: var(--kac-muted);
  font-size: .92em;
}

@media (max-width: 782px) {
  .kac-slot {
    margin-top: 1.75rem;
    margin-bottom: 1.75rem;
  }

  .kac-route-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .kac-route-btn {
    width: 100%;
    min-height: 46px;
    border-radius: 7px;
    text-align: center;
  }
}

@media (max-width: 420px) {
  .kac-route-options {
    grid-template-columns: 1fr;
  }
}