:root {
  --chunk-detail-ink: #172033;
  --chunk-detail-text: #344054;
  --chunk-detail-muted: #667085;
  --chunk-detail-line: #dfe5ef;
  --chunk-detail-blue: #2457d6;
  --chunk-detail-blue-dark: #1947ba;
  --chunk-detail-blue-soft: #eef4ff;
  --chunk-detail-green: #137a5b;
  --chunk-detail-green-soft: #ecfdf5;
  --chunk-detail-bg: #f3f6fb;
  --chunk-detail-shadow: 0 14px 36px rgba(23, 32, 51, 0.08);
}

.chunk-detail-page {
  position: relative;
  left: 50%;
  width: 100vw;
  max-width: 100vw;
  min-height: calc(100dvh - 96px);
  margin-left: -50vw;
  padding: 24px max(18px, calc((100vw - 980px) / 2)) 42px;
  box-sizing: border-box;
  overflow-x: hidden;
  color: var(--chunk-detail-text);
  background:
    radial-gradient(circle at 5% 0%, rgba(36, 87, 214, 0.11), transparent 31%),
    var(--chunk-detail-bg);
}

.chunk-detail-shell { max-width: 980px; margin: 0 auto; }

.chunk-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
  color: var(--chunk-detail-muted);
  font-size: .78rem;
  font-weight: 800;
}

.chunk-breadcrumb li:not(:last-child)::after { margin-left: 7px; content: "/"; color: #98a2b3; }
.chunk-breadcrumb a { color: #3159b1; text-decoration-thickness: 1px; text-underline-offset: 3px; }

.chunk-detail-hero,
.chunk-detail-panel {
  border: 1px solid var(--chunk-detail-line);
  background: #fff;
  box-shadow: var(--chunk-detail-shadow);
}

.chunk-detail-hero { padding: clamp(24px, 5vw, 48px); border-radius: 30px; }
.chunk-detail-eyebrow { margin: 0; color: var(--chunk-detail-blue); font-size: .76rem; font-weight: 900; letter-spacing: .12em; }
.chunk-detail-title { margin: 10px 0 0; color: var(--chunk-detail-ink); font-size: clamp(2.1rem, 6vw, 4rem); line-height: 1.08; font-weight: 900; overflow-wrap: anywhere; }
.chunk-detail-jp { margin: 12px 0 0; color: var(--chunk-detail-text); font-size: clamp(1.05rem, 2.5vw, 1.35rem); line-height: 1.7; font-weight: 900; }
.chunk-detail-meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 0; padding: 0; list-style: none; }
.chunk-detail-meta li { padding: 6px 10px; border-radius: 999px; color: #24458d; background: var(--chunk-detail-blue-soft); font-size: .72rem; font-weight: 900; }

.chunk-detail-audio-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 22px; }
.chunk-audio-button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 18px;
  border: 1px solid var(--chunk-detail-blue);
  border-radius: 999px;
  color: #fff;
  background: var(--chunk-detail-blue);
  font: inherit;
  font-size: .84rem;
  font-weight: 900;
  cursor: pointer;
}
.chunk-audio-button:hover, .chunk-audio-button:focus-visible { color: #fff; background: var(--chunk-detail-blue-dark); }
.chunk-audio-button:disabled { opacity: .58; cursor: wait; }
.chunk-audio-status { min-height: 1.4em; margin: 0; color: var(--chunk-detail-muted); font-size: .76rem; font-weight: 800; }

.chunk-detail-panel { margin-top: 18px; padding: clamp(21px, 4vw, 34px); border-radius: 25px; }
.chunk-detail-panel h2 { margin: 0; color: var(--chunk-detail-ink); font-size: clamp(1.25rem, 3vw, 1.55rem); font-weight: 900; }
.chunk-detail-copy { margin: 13px 0 0; font-size: 1rem; line-height: 1.9; font-weight: 700; }
.chunk-example { margin: 16px 0 0; padding: 20px; border-left: 5px solid var(--chunk-detail-green); border-radius: 15px; background: var(--chunk-detail-green-soft); }
.chunk-example-en { margin: 0; color: var(--chunk-detail-ink); font-size: clamp(1.15rem, 3vw, 1.45rem); line-height: 1.55; font-weight: 900; }
.chunk-example-jp { margin: 7px 0 0; color: #3f5f54; line-height: 1.7; font-weight: 800; }

.chunk-detail-actions { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 18px; }
.chunk-detail-action { display: flex; min-height: 70px; align-items: center; justify-content: center; padding: 13px; border: 1px solid #cdd9f8; border-radius: 17px; color: #24458d; background: var(--chunk-detail-blue-soft); font-size: .86rem; line-height: 1.5; font-weight: 900; text-align: center; text-decoration: none; }
.chunk-detail-action:hover, .chunk-detail-action:focus-visible { border-color: #91a8df; color: #173f9c; background: #e3edff; }
.chunk-detail-back { display: inline-flex; margin-top: 17px; color: #3159b1; font-weight: 900; }

@media (max-width: 700px) {
  .chunk-detail-page { padding: 16px 14px 30px; }
  .chunk-detail-hero, .chunk-detail-panel { border-radius: 22px; }
  .chunk-detail-actions { grid-template-columns: 1fr; }
  .chunk-detail-action { min-height: 54px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; }
}