/* Wissen hub: areas row + library (topics sidebar, search, cards) */
.wissen-areas { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.wissen-area { display: flex; flex-direction: column; gap: 4px; padding: 22px 22px 20px; background: var(--white); border: 1px solid var(--gray-line); border-radius: 16px; text-decoration: none; color: var(--ink); transition: border-color .15s ease, transform .15s ease; }
.wissen-area:hover { border-color: var(--purple); transform: translateY(-2px); }
.wissen-area-n { font-family: var(--font-head); font-weight: 700; font-size: 34px; line-height: 1; color: #590da0; letter-spacing: -0.03em; min-height: 34px; }
.wissen-area-t { font-family: var(--font-head); font-weight: 700; font-size: 17px; margin-top: 6px; }
.wissen-area-s { font-size: 14.5px; color: var(--gray-700); }
.lib { display: grid; grid-template-columns: 280px 1fr; gap: 48px; margin-top: 36px; align-items: start; }
.lib-nav { position: sticky; top: 100px; }
.lib-nav ul { list-style: none; margin: 0; padding: 0; }
.lib-nav li + li { border-top: 1px solid var(--gray-line); }
.lib-nav-btn { display: flex; width: 100%; justify-content: space-between; align-items: center; gap: 12px; padding: 13px 4px; background: none; border: 0; cursor: pointer; text-align: left; font: 500 15.5px/1.35 var(--font-body); color: var(--ink); }
.lib-nav-btn:hover { color: var(--purple); }
.lib-nav-btn.is-active { color: #590da0; font-weight: 700; }
.lib-n { color: var(--gray-500); font-size: 13.5px; font-variant-numeric: tabular-nums; }
.lib-nav-btn.is-active .lib-n { color: #590da0; }
.lib-search { width: 100%; padding: 14px 18px; font: 16px/1.4 var(--font-body); border: 1px solid var(--gray-line); border-radius: 12px; background: var(--white); color: var(--ink); }
.lib-search:focus { outline: 2px solid var(--purple); outline-offset: 2px; border-color: var(--purple); }
.lib-count { margin: 14px 0 22px; font-size: 14px; color: var(--gray-700); }
.lib-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px 36px; }
.lib-card { display: flex; flex-direction: column; gap: 8px; padding: 22px 0 26px; border-top: 1px solid var(--gray-line); }
.lib-card.is-hidden { display: none; }
.lib-meta { margin: 0; display: flex; gap: 12px; font-size: 13px; font-weight: 700; color: #590da0; }
.lib-meta .lib-type { color: var(--gray-700); }
.lib-title { margin: 0; font-size: 20px; line-height: 1.3; letter-spacing: -0.01em; }
.lib-title a { color: var(--ink); text-decoration: none; }
.lib-title a:hover { color: var(--purple); }
.lib-summary { margin: 0; font-size: 15.5px; color: var(--gray-700); }
.lib-cta { margin-top: auto; padding-top: 6px; font-weight: 600; font-size: 15px; color: var(--purple); text-decoration: none; }
.lib-cta:hover { text-decoration: underline; text-underline-offset: 4px; }
.lib-empty { margin-top: 20px; font-size: 16px; color: var(--gray-700); }
@media (max-width: 1040px) { .wissen-areas { grid-template-columns: repeat(2, 1fr); } .lib { grid-template-columns: 1fr; gap: 24px; } .lib-nav { position: static; } .lib-nav ul { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 6px; } .lib-nav li + li { border-top: 0; } .lib-nav-btn { white-space: nowrap; border: 1px solid var(--gray-line); border-radius: 999px; padding: 8px 14px; font-size: 14px; } .lib-nav-btn.is-active { background: var(--purple); border-color: var(--purple); color: #fff; } .lib-nav-btn.is-active .lib-n { color: #fff; } }
@media (max-width: 760px) { .wissen-areas { grid-template-columns: 1fr; } .lib-grid { grid-template-columns: 1fr; } }
.lib > * { min-width: 0; }
.lib-main, .lib-nav, .lib-grid, .lib-card { min-width: 0; max-width: 100%; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.resource-grid.is-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1040px) { .resource-grid.is-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .resource-grid.is-4 { grid-template-columns: 1fr; } }