/* ================================================================ 색인
   42편 이상을 훑기 위한 지면. 섹션 점프 · 호 필터 · 2단 조판
   ================================================================== */

.idx-hero {
  width: min(var(--mag-max), 100%);
  margin: 0 auto;
  padding: clamp(48px, 8vh, 100px) var(--mag-gutter) clamp(20px, 3vh, 36px);
  display: grid;
  justify-items: center;
  gap: 18px;
  text-align: center;
}

.idx-hero h1 {
  margin: 0;
  font-family: var(--mag-serif);
  font-size: clamp(1.9rem, 3.4vw, 2.9rem);
  font-weight: 700;
  line-height: 1.26;
  word-break: keep-all;
}

.idx-hero__standfirst {
  max-width: 28rem;
  margin: 0;
  color: var(--mag-ink-soft);
  font-size: clamp(0.96rem, 1.3vw, 1.02rem);
  font-weight: 500;
  line-height: 1.9;
  word-break: keep-all;
}

/* ------------------------------------------------------------ 도구 막대 */

.idx-tools {
  position: sticky;
  z-index: 15;
  top: 60px;
  width: min(var(--mag-max), 100%);
  margin: 0 auto;
  padding: 0 var(--mag-gutter);
  background: var(--mag-paper);
}

.idx-tools__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px 28px;
  padding: 14px 0;
  border-top: 1px solid var(--mag-rule-strong);
  border-bottom: 1px solid var(--mag-rule);
}

.idx-jump,
.idx-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 18px;
}

.idx-tools__label {
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mag-ink-soft);
  word-break: keep-all;
}

.idx-jump a {
  font-size: 0.82rem;
  font-weight: 700;
  word-break: keep-all;
}

.idx-jump a em {
  margin-left: 4px;
  color: var(--mag-ink-soft);
  font-size: 0.74rem;
  font-style: normal;
  font-variant-numeric: tabular-nums;
}

.idx-jump a:hover,
.idx-jump a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 0.3em;
}

/* 호 필터 — JS 없이도 전체 목록이 보이는 점진적 향상 */
.idx-filter button {
  padding: 4px 0;
  border: 0;
  border-bottom: 1px solid transparent;
  background: none;
  color: var(--mag-ink-soft);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  word-break: keep-all;
}

.idx-filter button:hover {
  color: var(--mag-ink);
}

.idx-filter button[aria-pressed="true"] {
  color: var(--mag-ink);
  border-bottom-color: var(--mag-ink);
}

/* ---------------------------------------------------------------- 목록 */

.idx-group {
  width: min(var(--mag-max), 100%);
  margin: 0 auto;
  padding: clamp(34px, 5vh, 56px) var(--mag-gutter) 0;
  scroll-margin-top: 130px;
}

.idx-group:last-of-type {
  padding-bottom: clamp(56px, 9vh, 110px);
}

.idx-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 4px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--mag-rule-strong);
}

.idx-group__head h2 {
  margin: 0;
  font-family: var(--mag-serif);
  font-size: clamp(1.3rem, 2.1vw, 1.75rem);
  font-weight: 700;
}

.idx-group__head .idx-group__ko {
  color: var(--mag-ink-soft);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.idx-group__head .idx-group__n {
  margin-left: auto;
  color: var(--mag-ink-soft);
  font-size: 0.74rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.idx-list {
  margin: 0;
  padding: 0;
  list-style: none;
  columns: 1;
}

@media (min-width: 1100px) {
  .idx-list { columns: 2; column-gap: clamp(32px, 4vw, 64px); }
}

.idx-list li {
  break-inside: avoid;
  -webkit-column-break-inside: avoid;
}

.idx-row {
  display: grid;
  grid-template-columns: minmax(96px, auto) 1fr;
  gap: 4px 18px;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px solid var(--mag-rule);
}

.idx-row__issue {
  color: var(--mag-ink-soft);
  font-family: var(--mag-serif);
  font-size: 0.82rem;
  font-style: italic;
  white-space: nowrap;
}

.idx-row__title {
  font-family: var(--mag-serif);
  font-size: clamp(1rem, 1.4vw, 1.16rem);
  font-weight: 600;
  line-height: 1.42;
  word-break: keep-all;
}

a.idx-row:hover .idx-row__title,
a.idx-row:focus-visible .idx-row__title {
  text-decoration: underline;
  text-underline-offset: 0.22em;
}

a.idx-row:hover .idx-row__issue,
a.idx-row:focus-visible .idx-row__issue {
  color: var(--mag-ink);
}

/* 필터로 감춰진 항목 */
.idx-list li[hidden] { display: none; }

/* 필터 결과 없음 */
.idx-empty {
  padding: 18px 0;
  color: var(--mag-ink-soft);
  font-family: var(--mag-serif);
  font-size: 0.94rem;
  font-style: italic;
}

/* ------------------------------------------------------------ 반응형 */

@media (max-width: 720px) {
  .idx-tools { position: static; }

  .idx-tools__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .idx-row {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .idx-row__issue { font-size: 0.78rem; }

  .idx-group { scroll-margin-top: 70px; }
}