.chairman-story {
  --cs-bg: #f7f6f2;
  --cs-surface: #ffffff;
  --cs-surface-soft: #fbfaf7;
  --cs-border: rgba(25, 45, 55, 0.08);
  --cs-border-strong: rgba(15, 97, 120, 0.16);
  --cs-text: #1d2b33;
  --cs-muted: #6d787f;
  --cs-accent: #0f6178;
  --cs-accent-soft: rgba(15, 97, 120, 0.08);
  --cs-shadow: 0 14px 34px rgba(16, 28, 34, 0.06);
  --cs-shadow-soft: 0 8px 18px rgba(16, 28, 34, 0.04);
  --cs-radius-xl: 24px;
  --cs-radius-lg: 18px;
  --cs-radius-md: 14px;
  --cs-max: 1320px;

  padding: 28px 22px 52px;
  color: var(--cs-text);
}

.chairman-story__inner {
  max-width: var(--cs-max);
  margin: 0 auto;
}

.chairman-story__group[hidden],
.chairman-story__detail[hidden] {
  display: none !important;
}

/* HERO */
.chairman-story__hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 440px;
  gap: 22px;
  align-items: stretch;
  margin-bottom: 18px;
  padding: 18px;
  border: 1px solid var(--cs-border);
  border-radius: 28px;
  background:
    linear-gradient(135deg, rgba(15, 97, 120, 0.035) 0%, rgba(255, 255, 255, 0.72) 100%);
  box-shadow: var(--cs-shadow-soft);
}

.chairman-story__hero-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  padding: 10px 18px 10px 12px;
}

.chairman-story__eyebrow {
  margin: 0 0 10px;
  font-size: 0.72rem;
  line-height: 1;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cs-accent);
}

.chairman-story__title {
  margin: 0;
  font-size: clamp(2rem, 3.1vw, 3.2rem);
  line-height: 0.94;
  font-weight: 700;
  letter-spacing: -0.045em;
  text-transform: uppercase;
  color: var(--cs-accent);
}

.chairman-story__subtitle {
  margin: 14px 0 0;
  max-width: 46ch;
  font-size: 0.96rem;
  line-height: 1.7;
  color: var(--cs-muted);
}

.chairman-story__quote {
  margin: 18px 0 0;
  padding-left: 16px;
  border-left: 2px solid rgba(15, 97, 120, 0.35);
}

.chairman-story__quote>*:first-child {
  margin-top: 0;
}

.chairman-story__quote>*:last-child {
  margin-bottom: 0;
}

.chairman-story__quote p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  font-style: italic;
  color: var(--cs-muted);
}

.chairman-story__portrait-wrap {
  overflow: hidden;
  min-height: 300px;
  border-radius: 22px;
  background: #dde5e8;
  box-shadow: 0 10px 22px rgba(8, 18, 24, 0.08);
}

.chairman-story__portrait {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 300px;
  object-fit: cover;
}

/* TABS */
.chairman-story__tabs {
  display: inline-flex;
  gap: 18px;
  margin: 0 0 18px;
  padding: 0 2px;
  border-bottom: 1px solid rgba(15, 97, 120, 0.12);
}

.chairman-story__tab {
  position: relative;
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--cs-muted);
  padding: 10px 20px;
  font: inherit;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.2s ease;
}

.chairman-story__tab::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  background: var(--cs-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
}

.chairman-story__tab:hover {
  color: var(--cs-text);
}

.chairman-story__tab.is-active {
  color: var(--cs-accent);
}

.chairman-story__tab.is-active::after {
  transform: scaleX(1);
}

.chairman-story__tab:focus-visible,
.chairman-story__nav-item:focus-visible {
  outline: 2px solid var(--cs-accent);
  outline-offset: 3px;
}

/* CONTENT */
.chairman-story__layout {
  display: grid;
  grid-template-columns: 235px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

/* NAV */
.chairman-story__nav {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.chairman-story__nav-item {
  appearance: none;
  width: 100%;
  display: grid;
    grid-template-columns: 20% 80%;   
    justify-content: start;
  gap: 10px;
  align-items: center;
  text-align: left;
  box-shadow: var(--cs-shadow-soft);
  padding: 10px;
  border: 1px solid transparent;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.72);
  cursor: pointer;
  transition:
    border-color 0.2s ease,
    background-color 0.2s ease,
    box-shadow 0.2s ease,
    transform 0.2s ease;
}

.chairman-story__nav-item:hover {
  border-color: var(--cs-border);
  background: #fff;
  box-shadow: var(--cs-shadow-soft);
  transform: translateY(-1px);
}

.chairman-story__nav-item.is-active {
  border-color: var(--cs-border-strong);
  background: linear-gradient(180deg, #ffffff 0%, #f8fbfc 100%);
  box-shadow: 0 10px 20px rgba(15, 97, 120, 0.05);
}

.chairman-story__nav-meta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--cs-accent);
  opacity: 0.8;
}

.chairman-story--history .chairman-story__nav-meta {
  font-size: 1.3rem;
}

.chairman-story--history .chairman-story__detail-index {
  font-size: 1.3rem;
}

.chairman-story__nav-thumb {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border-radius: 10px;
  background: #dde4e7;
}

.chairman-story__nav-thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.chairman-story__nav-title {
  display: block;
  font-size: 14px;
  line-height: 1.28;
  font-weight: 400;
  color: var(--cs-text);
}

/* DETAIL */
.chairman-story__details {
  min-width: 0;
}

.chairman-story__detail {
  display: none;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.82fr);
  min-height: 400px;
  border: 1px solid var(--cs-border);
  border-radius: 24px;
  overflow: hidden;
  background: var(--cs-surface);
  box-shadow: var(--cs-shadow);
  animation: chairmanFade 0.24s ease;
}

.chairman-story__detail.is-active {
  display: grid;
}

.chairman-story__detail-image {
  min-width: 0;
  background: #dde4e7;
}

.chairman-story__detail-image img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 400px;
  object-fit: cover;
}

.chairman-story__detail-content {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  min-width: 0;
  padding: 28px 28px 26px;
  background:
    linear-gradient(180deg, rgba(15, 97, 120, 0.025) 0%, rgba(15, 97, 120, 0) 100%),
    #ffffff;
}

.chairman-story__detail-index {
  margin: 0 0 10px;
  font-size: 0.72rem;
  line-height: 1;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cs-accent);
  opacity: 0.8;
}

.chairman-story__detail-title {
  margin: 0 0 12px;
  font-size: clamp(42px, 1.8vw, 1.95rem);
  line-height: 1.05;
  font-weight: 700;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  color: var(--cs-accent);
}

.chairman-story__detail-text {
  color: var(--cs-muted);
  font-size: 14px;
  line-height: 18px;
}

.chairman-story__detail-text>*:first-child {
  margin-top: 0;
}

.chairman-story__detail-text>*:last-child {
  margin-bottom: 0;
}

.chairman-story__detail-text p,
.chairman-story__detail-text ul,
.chairman-story__detail-text ol {
  margin: 0 0 0.9rem;
}

.chairman-story__detail-text a {
  color: var(--cs-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

.chairman-story__empty {
  margin: 0;
  padding: 14px 16px;
  border: 1px solid var(--cs-border);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.75);
  color: var(--cs-muted);
  font-size: 0.94rem;
}

/* ANIM */
@keyframes chairmanFade {
  from {
    opacity: 0;
    transform: translateY(6px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* TABLET */
@media (max-width: 1100px) {
  .chairman-story__hero {
    grid-template-columns: 1fr;
  }

  .chairman-story__title {
    max-width: 100%;
  }

  .chairman-story__layout {
    grid-template-columns: 1fr;
  }

  .chairman-story__nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .chairman-story__detail {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .chairman-story__detail-image img {
    min-height: 320px;
  }
}

/* MOBILE */
@media (max-width: 768px) {
  .chairman-story {
    padding: 20px 14px 38px;
  }

  .chairman-story__hero {
    gap: 16px;
    padding: 14px;
    border-radius: 20px;
  }

  .chairman-story__hero-content {
    padding: 4px 6px;
  }

  .chairman-story__title {
    font-size: clamp(1.7rem, 8vw, 2.5rem);
  }

  .chairman-story__subtitle {
    font-size: 0.92rem;
  }

  .chairman-story__portrait-wrap,
  .chairman-story__portrait {
    min-height: 240px;
  }

  .chairman-story__tabs {
    gap: 16px;
    width: 100%;
    overflow-x: auto;
    white-space: nowrap;
  }

  .chairman-story__layout {
    gap: 14px;
  }

  .chairman-story__nav {
    display: flex;
    flex-direction: row;
    overflow-x: auto;
    gap: 10px;
    padding-bottom: 2px;
    scroll-snap-type: x proximity;
    -webkit-overflow-scrolling: touch;
  }

  .chairman-story__nav::-webkit-scrollbar {
    height: 5px;
  }

  .chairman-story__nav::-webkit-scrollbar-thumb {
    background: rgba(15, 97, 120, 0.2);
    border-radius: 999px;
  }

  .chairman-story__nav-item {
    flex: 0 0 230px;
    scroll-snap-align: start;
    grid-template-columns: 46px minmax(0, 1fr);
  }

  .chairman-story__detail {
    grid-template-columns: 1fr;
    border-radius: 20px;
  }

  .chairman-story__detail-image img {
    min-height: 240px;
  }

  .chairman-story__detail-content {
    padding: 22px 18px;
  }

  .chairman-story__detail-title {
    font-size: clamp(1.25rem, 5.6vw, 1.75rem);
  }

  .chairman-story__detail-text {
    font-size: 0.94rem;
    line-height: 1.68;
  }
}

@media (prefers-reduced-motion: reduce) {

  .chairman-story__tab,
  .chairman-story__nav-item,
  .chairman-story__detail {
    transition: none;
    animation: none;
  }
}