:root {
  --materials-teal: var(--oi-teal, #168579);
  --materials-teal-dark: #0f675f;
  --materials-coral: var(--oi-coral, #ff6b4a);
  --materials-navy: var(--oi-navy, #142238);
}

.listening-materials-page .main-panel { min-width: 0; }
.materials-head { min-height: 126px; align-items: flex-end; padding: 16px 8px 24px; }
.materials-head h1 { margin: 0; color: var(--materials-navy); font: 800 clamp(40px, 5vw, 58px)/1.05 Georgia, "Noto Serif SC", "Songti SC", serif; letter-spacing: -.045em; }
.head-count { min-width: 112px; padding: 12px 15px; border: 1px solid var(--oi-line); border-radius: 14px; color: var(--oi-muted); background: rgba(255,253,250,.82); font-size: 11px; text-align: right; }
.head-count strong { display: block; color: var(--materials-navy); font: 800 26px/1 Georgia, serif; }

.materials-intro {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 28px;
  overflow: hidden;
  padding: clamp(28px, 4vw, 46px);
  border-radius: 26px;
  color: #fff;
  background:
    radial-gradient(circle at 88% 12%, rgba(22,133,121,.48), transparent 22rem),
    linear-gradient(115deg, #142238 0%, #17334a 70%, #164a50 100%);
  box-shadow: 0 22px 48px rgba(20,34,56,.15);
}
.materials-intro::after { content: "LS"; position: absolute; right: 28px; top: -38px; color: rgba(255,255,255,.045); font: 900 180px/1 Georgia, serif; pointer-events: none; }
.intro-kicker { color: #88e1d6; font-size: 11px; font-weight: 900; letter-spacing: .15em; text-transform: uppercase; }
.materials-intro h2 { max-width: 690px; margin: 12px 0 0; font: 800 clamp(30px, 4vw, 48px)/1.1 Georgia, "Noto Serif SC", "Songti SC", serif; letter-spacing: -.035em; }
.intro-stat { position: relative; z-index: 1; min-width: 132px; padding: 18px; border: 1px solid rgba(255,255,255,.15); border-radius: 18px; background: rgba(255,255,255,.07); backdrop-filter: blur(10px); }
.intro-stat strong, .intro-stat span { display: block; }
.intro-stat strong { font: 800 38px/1 Georgia, serif; }
.intro-stat span { margin-top: 7px; color: rgba(255,255,255,.62); font-size: 11px; }

.collection-list { display: grid; gap: 12px; margin-top: 20px; }
.collection-row {
  display: grid;
  grid-template-columns: 64px minmax(300px, 1fr) minmax(210px, .42fr) 132px;
  align-items: center;
  gap: 22px;
  padding: 24px 26px;
  border: 1px solid rgba(20,34,56,.1);
  border-radius: 20px;
  background: rgba(255,253,250,.96);
  box-shadow: 0 12px 34px rgba(20,34,56,.055);
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}
.collection-row:hover { transform: translateY(-2px); border-color: rgba(22,133,121,.3); box-shadow: 0 18px 40px rgba(20,34,56,.09); }
.collection-number { color: var(--materials-teal); font: 800 25px/1 Georgia, serif; }
.collection-copy { min-width: 0; }
.collection-label { color: var(--materials-teal-dark); font-size: 9px; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
.collection-copy h2 { margin: 6px 0 0; color: var(--materials-navy); font: 800 23px/1.2 Georgia, "Noto Serif SC", "Songti SC", serif; }
.collection-progress { min-width: 0; }
.progress-copy { display: flex; justify-content: space-between; gap: 12px; color: var(--oi-muted); font-size: 10px; }
.progress-copy strong { color: var(--materials-navy); font-size: 11px; font-variant-numeric: tabular-nums; }
.progress-track { height: 7px; overflow: hidden; margin-top: 9px; border-radius: 999px; background: #e9edef; }
.progress-track span { display: block; width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--materials-teal), #39aa9c); transition: width .3s ease; }
.collection-status { display: inline-flex; margin-top: 9px; padding: 4px 7px; border-radius: 999px; color: #677589; background: #f0f2f3; font-size: 9px; font-weight: 850; }
.collection-status.is-progress { color: var(--materials-teal-dark); background: #e7f6f2; }
.collection-status.is-done { color: #126049; background: #e7f7ee; }
.collection-action { min-height: 44px; display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 10px 14px; border-radius: 11px; color: #fff; background: var(--materials-coral); font-size: 11px; font-weight: 850; text-decoration: none; box-shadow: 0 9px 18px rgba(255,107,74,.18); }
.collection-action:hover { filter: brightness(.97); }
.collection-action b { font-size: 18px; line-height: 1; }

@media (max-width: 980px) {
  .collection-row { grid-template-columns: 54px minmax(0, 1fr) 120px; }
  .collection-progress { grid-column: 2 / 3; }
  .collection-action { grid-column: 3; grid-row: 1 / span 2; align-self: stretch; }
}

@media (max-width: 620px) {
  .materials-head { min-height: auto; padding: 10px 4px 18px; }
  .materials-head h1 { font-size: 34px; }
  .head-count { display: none; }
  .materials-intro { grid-template-columns: 1fr; padding: 25px 20px; border-radius: 20px; }
  .materials-intro h2 { font-size: 31px; }
  .intro-stat { display: none; }
  .collection-row { grid-template-columns: 38px minmax(0,1fr); gap: 14px; padding: 19px 17px; border-radius: 17px; }
  .collection-number { align-self: start; padding-top: 2px; font-size: 20px; }
  .collection-progress, .collection-action { grid-column: 2; grid-row: auto; }
  .collection-action { min-height: 42px; }
}

@media (prefers-reduced-motion: reduce) {
  .collection-row, .progress-track span { transition: none; }
}