:root {
  --rg-blue: #155eef;
  --rg-ink: #0b1838;
  --rg-muted: #60708f;
  --rg-line: #dbe5f5;
  --rg-soft: #f4f8ff;
  --rg-card: #fff;
}

.resource-group-browser { padding: 52px 0 18px; background: linear-gradient(180deg, #f8fbff, transparent); }
.resource-group-browser + .simple-library-section { padding-top: 34px; }
.resource-group-heading { display: flex; justify-content: space-between; gap: 2rem; align-items: end; margin-bottom: 1.4rem; }
.resource-group-heading span, .resource-group-kicker { color: var(--rg-blue); font-size: .72rem; font-weight: 850; letter-spacing: .09em; text-transform: uppercase; }
.resource-group-heading h2 { margin: .3rem 0; color: var(--rg-ink); font-size: clamp(1.7rem, 3.5vw, 2.6rem); letter-spacing: -.035em; }
.resource-group-heading p { margin: 0; color: var(--rg-muted); }
.resource-group-heading > a { color: var(--rg-blue); font-weight: 800; text-decoration: none; }
.resource-group-card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.resource-group-card { position: relative; display: grid; min-height: 155px; padding: 1.25rem; overflow: hidden; border: 1px solid var(--rg-line); border-radius: 18px; background: var(--rg-card); box-shadow: 0 10px 30px rgba(29, 64, 119, .07); color: inherit; text-decoration: none; transition: transform .22s, border-color .22s, box-shadow .22s; }
.resource-group-card::after { content: ""; position: absolute; right: -28px; bottom: -36px; width: 100px; height: 100px; border-radius: 50%; background: radial-gradient(circle, rgba(21, 94, 239, .12), transparent 70%); }
.resource-group-card:hover { transform: translateY(-4px); border-color: #9ebcf0; box-shadow: 0 17px 38px rgba(29, 64, 119, .13); }
.resource-group-card > span { color: var(--rg-blue); font-size: .68rem; font-weight: 800; text-transform: uppercase; }
.resource-group-card > strong { margin: .5rem 0 .25rem; color: var(--rg-ink); font-size: 1.16rem; }
.resource-group-card > small { color: var(--rg-muted); line-height: 1.5; }
.resource-group-card > b { align-self: end; margin-top: .9rem; color: var(--rg-blue); font-size: .75rem; }
.resource-group-no-groups { grid-column: 1 / -1; padding: 2.5rem 1rem; border: 1px dashed #b8c9e2; border-radius: 18px; text-align: center; }
.resource-group-no-groups strong { display: block; color: var(--rg-ink); font-size: 1.25rem; }
.resource-group-no-groups p { color: var(--rg-muted); }

.resource-group-hero { position: relative; overflow: hidden; padding: 2.3rem 0 3.4rem; border-bottom: 1px solid var(--rg-line); background: radial-gradient(circle at 83% 25%, rgba(37, 99, 235, .18), transparent 26rem), linear-gradient(135deg, #f9fbff, #edf5ff); }
.resource-group-hero::after { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .32; background-image: radial-gradient(#6b9fea 1px, transparent 1px); background-size: 24px 24px; mask-image: linear-gradient(to right, transparent 20%, #000, transparent); }
.resource-group-hero .container { position: relative; z-index: 1; }
.resource-group-hero .breadcrumb { margin-bottom: 2.2rem; }
.resource-group-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 3rem; align-items: end; }
.resource-group-hero h1 { margin: .55rem 0; color: var(--rg-ink); font-size: clamp(2.7rem, 6vw, 5.1rem); line-height: 1; letter-spacing: -.055em; }
.resource-group-hero-grid > div:first-child > p { max-width: 780px; margin: 0; color: var(--rg-muted); font-size: 1rem; line-height: 1.75; }
.resource-group-summary { display: grid; grid-template-columns: repeat(3, minmax(90px, 1fr)); overflow: hidden; border: 1px solid #ccdaee; border-radius: 15px; background: rgba(255, 255, 255, .85); box-shadow: 0 14px 34px rgba(30, 68, 127, .1); }
.resource-group-summary span { display: grid; min-width: 105px; padding: .9rem 1rem; border-right: 1px solid var(--rg-line); }
.resource-group-summary span:last-child { border: 0; }
.resource-group-summary strong { color: var(--rg-ink); font-size: 1.25rem; }
.resource-group-summary small { color: var(--rg-muted); font-size: .68rem; }
.resource-group-tags { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.7rem; }
.resource-group-tags span { padding: .38rem .65rem; border: 1px solid #cddbf0; border-radius: 999px; background: rgba(255, 255, 255, .75); color: #38577f; font-size: .7rem; font-weight: 750; }

.resource-group-library { padding: 4rem 0 5rem; background: #f8faff; }
.resource-group-search { display: flex; align-items: center; width: min(100%, 330px); min-height: 48px; padding: 0 .85rem; border: 1px solid #cbd9ed; border-radius: 12px; background: #fff; }
.resource-group-search svg { width: 1.15rem; height: 1.15rem; fill: none; stroke: var(--rg-blue); stroke-width: 2; }
.resource-group-search input { flex: 1; min-width: 0; height: 44px; padding-left: .65rem; border: 0; outline: 0; background: transparent; color: var(--rg-ink); font: inherit; }
.resource-group-rows { display: grid; gap: .75rem; }
.resource-group-row { display: grid; grid-template-columns: minmax(0, 1fr) 90px 180px; gap: 1rem; align-items: center; padding: .9rem; border: 1px solid var(--rg-line); border-radius: 16px; background: #fff; box-shadow: 0 7px 24px rgba(31, 62, 108, .055); }
.resource-group-row[hidden] { display: none; }
.resource-group-row-main { display: grid; grid-template-columns: 78px minmax(0, 1fr); gap: 1rem; align-items: center; min-width: 0; color: inherit; text-decoration: none; }
.resource-group-thumb { display: grid; width: 78px; height: 92px; place-items: center; overflow: hidden; border-radius: 10px; background: #edf3ff; }
.resource-group-thumb img { width: 100%; height: 100%; object-fit: cover; }
.resource-group-file-icon { display: grid; place-items: center; color: #dc2626; }
.resource-group-file-icon svg { width: 2rem; height: 2rem; fill: none; stroke: currentColor; stroke-width: 1.6; }
.resource-group-file-icon small { margin-top: .2rem; font-size: .58rem; font-weight: 900; }
.resource-group-copy { display: grid; min-width: 0; }
.resource-group-copy > small { color: var(--rg-blue); font-size: .66rem; font-weight: 800; text-transform: uppercase; }
.resource-group-copy > strong { overflow: hidden; margin: .25rem 0; color: var(--rg-ink); font-size: 1rem; text-overflow: ellipsis; white-space: nowrap; }
.resource-group-copy > span { display: -webkit-box; overflow: hidden; color: var(--rg-muted); font-size: .78rem; line-height: 1.55; -webkit-box-orient: vertical; -webkit-line-clamp: 2; }
.resource-group-copy > em { width: fit-content; margin-top: .45rem; padding: .2rem .45rem; border-radius: 999px; background: #edf3ff; color: #496587; font-size: .62rem; font-style: normal; }
.resource-group-row-stats { display: grid; text-align: center; }
.resource-group-row-stats b { color: var(--rg-ink); }
.resource-group-row-stats small { color: var(--rg-muted); font-size: .66rem; }
.resource-group-row-actions { display: grid; gap: .45rem; }
.resource-group-row-actions a { display: grid; min-height: 36px; place-items: center; border: 1px solid #c5d5ed; border-radius: 9px; color: #35577f; font-size: .72rem; font-weight: 800; text-decoration: none; }
.resource-group-row-actions a.is-download { border-color: var(--rg-blue); background: var(--rg-blue); color: #fff; }
.resource-group-empty { padding: 3rem 1rem; text-align: center; }
.resource-group-empty strong { color: var(--rg-ink); font-size: 1.25rem; }
.resource-group-empty p { color: var(--rg-muted); }
.resource-group-pagination { display: grid; grid-template-columns: 1fr auto 1fr; gap: 1rem; align-items: center; margin-top: 1.5rem; }
.resource-group-pagination > :last-child { justify-self: end; }
.resource-group-pagination a { padding: .6rem .8rem; border: 1px solid #c5d5ed; border-radius: 9px; background: #fff; color: var(--rg-blue); font-size: .75rem; font-weight: 800; text-decoration: none; }
.resource-group-pagination > span { color: var(--rg-muted); font-size: .75rem; }
.resource-related-groups { padding: 4rem 0; }
.compact-book-group { margin: .2rem 0 .8rem; color: var(--rg-muted); font-size: .82rem; }
.compact-book-group a { color: var(--rg-blue); font-weight: 800; text-decoration: none; }

html[data-theme="dark"] { --rg-ink: #e9f0ff; --rg-muted: #a8b6cc; --rg-line: #263852; --rg-soft: #101b2d; --rg-card: #101d31; }
html[data-theme="dark"] .resource-group-browser, html[data-theme="dark"] .resource-group-library { background: #091524; }
html[data-theme="dark"] .resource-group-hero { background: radial-gradient(circle at 83% 25%, rgba(37, 99, 235, .22), transparent 26rem), #0b1729; }
html[data-theme="dark"] .resource-group-card, html[data-theme="dark"] .resource-group-row, html[data-theme="dark"] .resource-group-search, html[data-theme="dark"] .resource-group-summary { background: #101d31; }

@media (max-width: 900px) {
  .resource-group-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .resource-group-hero-grid { grid-template-columns: 1fr; gap: 2rem; }
  .resource-group-summary { width: 100%; }
  .resource-group-row { grid-template-columns: minmax(0, 1fr) 150px; }
  .resource-group-row-stats { display: none; }
}
@media (max-width: 620px) {
  .resource-group-heading { align-items: start; flex-direction: column; }
  .resource-group-card-grid { grid-template-columns: 1fr; }
  .resource-group-summary span { min-width: 0; padding: .7rem; }
  .resource-group-hero h1 { overflow-wrap: anywhere; font-size: clamp(2.5rem, 13vw, 3.4rem); }
  .resource-group-row { grid-template-columns: 1fr; }
  .resource-group-row-main { grid-template-columns: 62px minmax(0, 1fr); }
  .resource-group-thumb { width: 62px; height: 76px; }
  .resource-group-row-actions { grid-template-columns: 1fr 1fr; }
  .resource-group-pagination { grid-template-columns: 1fr 1fr; }
  .resource-group-pagination > span { grid-column: 1 / -1; grid-row: 1; text-align: center; }
}
@media (prefers-reduced-motion: reduce) { .resource-group-card { transition: none; } }