.lrn { display: flex; flex-direction: column; gap: var(--s-5); }


.lrn-fallback {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 15px 20px;
  border: 1px solid var(--line-strong);
  background: rgba(0, 8, 0, 0.55);
  font-family: var(--font-mono); font-size: 14px; letter-spacing: 0.5px;
  color: var(--ink); text-decoration: none;
  transition: border-color 200ms ease, color 200ms ease, transform 200ms ease;
}
.lrn-fallback:hover { border-color: var(--green); color: var(--green); transform: translateX(4px); }
.lrn-fallback .mico { color: var(--green); }


.lrn-headside {
  display: flex; flex-direction: column; align-items: flex-start; gap: 8px;
  min-width: 0;
}
.lrn-viewbar {
  display: flex; align-items: center; gap: 4px; flex-wrap: nowrap;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 1.5px;
}
.lrn-viewbar[hidden] { display: none; }
.lrn-viewbar .vb {
  appearance: none; border: 0; background: none; cursor: pointer;
  font: inherit; letter-spacing: inherit; white-space: nowrap;
  color: var(--ink-dim); padding: 6px 6px;
  transition: color 180ms ease, text-shadow 180ms ease;
}
.lrn-viewbar .vb:hover { color: var(--ink); }
.lrn-viewbar .vb:focus-visible { outline: 1px solid var(--green); outline-offset: 2px; }
#lernen[data-lrn-view="path"] .lrn-viewbar .vb[data-view="path"],
#lernen[data-lrn-view="tree"] .lrn-viewbar .vb[data-view="tree"] {
  color: var(--green); text-shadow: 0 0 8px rgba(57, 255, 20, 0.5);
}


#lernen[data-lrn-view="path"] #lrn-root { display: none; }
#lernen[data-lrn-view="tree"] #lrn-path-root { display: none; }


.lrn-head-row {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: var(--s-4); flex-wrap: wrap;
}
.lrn-shell { display: block; }

.lrn-master {
  appearance: none; border: 0; background: none; color: inherit; font: inherit;
  display: inline-flex; align-items: center; gap: 16px;
  cursor: pointer; padding: 0; text-align: left;
}
.lrn-master:focus-visible { outline: 1px solid var(--green); outline-offset: 6px; }
.lrn-master-title { transition: text-shadow 220ms ease; }
.lrn-master:hover .lrn-master-title { text-shadow: 0 0 26px rgba(57, 255, 20, 0.4); }
.lrn-master-chev {
  font-family: var(--font-mono); font-size: clamp(18px, 2.6vw, 28px); line-height: 1;
  color: var(--green); text-shadow: 0 0 10px rgba(57, 255, 20, 0.5);
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
.lrn-master-chev[hidden] { display: none; }
.lrn-master[aria-expanded="true"] .lrn-master-chev { transform: rotate(90deg); }
.lrn-master-meta { font-family: var(--font-mono); font-size: 11px; letter-spacing: 1.5px; color: var(--ink-dim); white-space: nowrap; }

.lrn-shell.is-collapsible .lrn-master-body {
  display: grid; grid-template-rows: 0fr;
  transition: grid-template-rows 500ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
.lrn-shell.is-collapsible.is-open .lrn-master-body { grid-template-rows: 1fr; }
.lrn-master-inner { min-height: 0; }
.lrn-shell.is-collapsible .lrn-master-inner { overflow: hidden; padding-top: var(--s-5); }


.lrn-sem { display: flex; flex-direction: column; gap: 0; }
.lrn-sem-toggle {
  appearance: none; border: 0; background: none; color: inherit; font: inherit;
  width: 100%; text-align: left; cursor: pointer;
  display: flex; align-items: center; gap: var(--s-3);
  padding: var(--s-2) 0;
  font-family: var(--font-mono);
}
.lrn-sem-toggle:focus-visible { outline: 1px solid var(--green); outline-offset: 2px; }

.lrn-sem-tag { order: 1; }
.lrn-sem-chev { order: 2; }
.lrn-sem-line { order: 3; }
.lrn-sem-meta { order: 4; }
.lrn-sem-chev {
  color: var(--green); text-shadow: 0 0 8px rgba(57, 255, 20, 0.5); flex: none;
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
.lrn-sem.is-open .lrn-sem-chev { transform: rotate(90deg); }
.lrn-sem-tag {
  position: relative; isolation: isolate; overflow: hidden;
  display: inline-flex; align-items: center;
  font-size: 11px; letter-spacing: 2px; color: var(--green);
  padding: 9px 16px; white-space: nowrap; border-radius: 11px;
  border: 1px solid rgba(120, 255, 110, 0.28);
  background:
    linear-gradient(140deg, rgba(57, 255, 20, 0.16), rgba(57, 255, 20, 0.03) 48%),
    rgba(7, 20, 7, 0.5);
  -webkit-backdrop-filter: blur(13px) saturate(150%);
  backdrop-filter: blur(13px) saturate(150%);
  box-shadow:
    0 8px 26px rgba(0, 0, 0, 0.5),
    0 0 22px rgba(57, 255, 20, 0.10),
    inset 0 1px 0 rgba(150, 255, 140, 0.4),
    inset 0 0 24px rgba(57, 255, 20, 0.05);
  text-shadow: 0 0 12px rgba(57, 255, 20, 0.5);
  transition: border-color 280ms ease, box-shadow 280ms ease,
              transform 280ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
.lrn-sem-tag::before {
  content: ""; position: absolute; inset: 0; z-index: -1; border-radius: inherit;
  background: linear-gradient(180deg, rgba(220, 255, 210, 0.14), transparent 42%);
  pointer-events: none;
}
.lrn-sem-toggle:hover .lrn-sem-tag {
  transform: translateY(-1px);
  border-color: rgba(120, 255, 110, 0.55);
  box-shadow:
    0 12px 32px rgba(0, 0, 0, 0.55),
    0 0 32px rgba(57, 255, 20, 0.20),
    inset 0 1px 0 rgba(150, 255, 140, 0.55),
    inset 0 0 28px rgba(57, 255, 20, 0.08);
}
.lrn-sem-line { flex: 1; height: 1px; background: var(--line); }
.lrn-sem-meta { font-size: 11px; letter-spacing: 1.5px; color: var(--ink-dim); white-space: nowrap; }

.lrn-sem-body {
  display: grid; grid-template-rows: 0fr;
  transition: grid-template-rows 480ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
.lrn-sem.is-open .lrn-sem-body { grid-template-rows: 1fr; }
.lrn-sem-inner { overflow: hidden; min-height: 0; }
.lrn-sem.is-open .lrn-sem-inner { padding-top: var(--s-3); }


.lrn-courses { display: flex; flex-direction: column; gap: var(--s-2); }

.lrn-course {
  border: 1px solid var(--line);
  background: rgba(0, 8, 0, 0.45);
  transition: border-color 250ms ease, box-shadow 250ms ease;
}
.lrn-course:hover { border-color: var(--line-strong); }
.lrn-course.is-open {
  border-color: var(--line-strong);
  box-shadow: 0 0 30px rgba(57, 255, 20, 0.07);
}


.lrn-course-head {
  appearance: none; border: 0; background: none; color: inherit; font: inherit;
  width: 100%; text-align: left; cursor: pointer;
  display: grid;
  grid-template-columns: max-content 1fr auto max-content;
  align-items: center; gap: var(--s-4);
  padding: var(--s-3) var(--s-4);
}
.lrn-course-head:focus-visible { outline: 1px solid var(--green); outline-offset: -1px; }

.lrn-idx {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 1px;
  color: var(--green);
  border: 1px solid var(--line-strong);
  background: rgba(57, 255, 20, 0.04);
  text-shadow: 0 0 8px rgba(57, 255, 20, 0.5);
  transition: box-shadow 250ms ease;
}
.lrn-course-head:hover .lrn-idx,
.lrn-course.is-open .lrn-idx { box-shadow: 0 0 16px rgba(57, 255, 20, 0.18); }

.lrn-course-title { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.lrn-course-name {
  font-size: clamp(18px, 2.4vw, 24px); font-weight: 300;
  color: #fff; letter-spacing: -0.5px; line-height: 1.15;
  transition: color 200ms ease;
}
.lrn-course-head:hover .lrn-course-name { color: var(--green); }
.lrn-course-sub {
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 1.5px; color: var(--ink-dim);
}


.lrn-progress { display: flex; align-items: center; gap: 10px; }
.lrn-bar {
  width: 120px; height: 4px; position: relative; overflow: hidden;
  background: rgba(57, 255, 20, 0.12);
}
.lrn-bar i {
  position: absolute; top: 0; bottom: 0; left: 0; width: 0%;
  background: var(--green);
  box-shadow: 0 0 10px var(--green);
  transition: width 900ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
.lrn-pct {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 1px;
  color: var(--green); min-width: 4ch; text-align: right;
}

.lrn-chev {
  font-family: var(--font-mono); color: var(--green);
  text-shadow: 0 0 8px rgba(57, 255, 20, 0.5);
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
.lrn-course.is-open .lrn-chev { transform: rotate(90deg); }


.lrn-course-body {
  display: grid; grid-template-rows: 0fr;
  transition: grid-template-rows 480ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
.lrn-course.is-open .lrn-course-body { grid-template-rows: 1fr; }
.lrn-course-inner {
  overflow: hidden; min-height: 0;
  opacity: 0; transform: translateY(-6px);
  transition: opacity 350ms ease 80ms, transform 350ms ease 80ms;
}
.lrn-course.is-open .lrn-course-inner { opacity: 1; transform: none; }


.lrn-topics {
  list-style: none; margin: 0;
  position: relative;
  padding: var(--s-1) var(--s-4) var(--s-4) calc(var(--s-4) + 60px);
  display: flex; flex-direction: column; gap: var(--s-3);
}

.lrn-topics::before {
  content: "";
  position: absolute; top: 16px; bottom: 24px;
  left: calc(var(--s-4) + 21px);
  width: 1px; background: var(--line-strong);
}
.lrn-topic { position: relative; }
.lrn-topic-dot {
  position: absolute; top: 5px;
  left: calc(-39px - 4px);
  width: 9px; height: 9px; border-radius: 50%;
  border: 1px solid var(--green);
  background: var(--bg-0, #030503);
}
.lrn-topic.has-mat .lrn-topic-dot {
  background: var(--green);
  box-shadow: 0 0 10px var(--green);
}
.lrn-topic.is-empty .lrn-topic-dot { border-color: var(--line-strong); }

.lrn-topic-head {
  display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap;
  font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.5px;
}
.lrn-topic-num { color: var(--green); }
.lrn-topic-title { color: var(--ink); }
.lrn-topic.is-empty .lrn-topic-title { color: var(--ink-dim); }
.lrn-topic-tag {
  font-size: 9px; letter-spacing: 1px; line-height: 1.4;
  padding: 2px 7px; border: 1px solid var(--line);
  color: var(--ink-dim); white-space: nowrap;
}
.lrn-topic-tag.is-warn { color: var(--green); border-color: var(--line-strong); opacity: 0.85; }


.lrn-topic-toggle {
  appearance: none; border: 0; background: none; color: inherit; font: inherit;
  width: 100%; text-align: left; cursor: pointer;
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.5px;
  padding: 3px 0;
}
.lrn-topic-toggle:focus-visible { outline: 1px solid var(--green); outline-offset: 2px; }
.lrn-topic-head-l { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; min-width: 0; }
.lrn-topic-head-r { display: flex; align-items: center; gap: 10px; margin-left: auto; flex: none; }
.lrn-topic-toggle .lrn-topic-title { transition: color 180ms ease; }
.lrn-topic-toggle:hover .lrn-topic-title { color: var(--green); }
.lrn-topic-count { color: var(--ink-dim); font-size: 11px; letter-spacing: 1px; white-space: nowrap; }
.lrn-topic-chev {
  color: var(--green); text-shadow: 0 0 8px rgba(57, 255, 20, 0.5); flex: none;
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
.lrn-topic.is-open .lrn-topic-chev { transform: rotate(90deg); }


.lrn-topic-toggle.is-direct-link { text-decoration: none; color: inherit; }
.lrn-topic-arrow {
  color: var(--green); text-shadow: 0 0 8px rgba(57, 255, 20, 0.5); flex: none;
  transition: transform 320ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
.lrn-topic-toggle.is-direct-link:hover .lrn-topic-arrow { transform: translateX(5px); }

.lrn-topic-body {
  display: grid; grid-template-rows: 0fr;
  transition: grid-template-rows 420ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
.lrn-topic.is-open .lrn-topic-body { grid-template-rows: 1fr; }
.lrn-topic-inner { overflow: hidden; min-height: 0; }


.lrn-mods { display: flex; flex-direction: column; gap: 8px; margin-top: 10px; }
.lrn-topic.is-direct .lrn-mods { margin-top: 0; }
.lrn-mod {
  display: flex; align-items: center; gap: 12px;
  padding: 13px 16px;
  border: 1px solid var(--line-strong);
  background: rgba(0, 8, 0, 0.55);
  font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.5px;
  color: var(--ink); text-decoration: none;
  transition: border-color 200ms ease, color 200ms ease,
              transform 200ms ease, box-shadow 200ms ease;
}
.lrn-mod:hover, .lrn-mod:focus-visible {
  border-color: var(--green); color: var(--green);
  transform: translateX(4px); outline: none;
  box-shadow: 0 0 20px rgba(57, 255, 20, 0.16);
}
.lrn-mod-ico { color: var(--green); flex: none; }
.lrn-mod-label { min-width: 0; }
.lrn-mod-arrow {
  margin-left: auto; color: var(--green); flex: none;
  transition: transform 320ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
.lrn-mod:hover .lrn-mod-arrow { transform: translateX(5px); }

.lrn-empty {
  margin: 0; padding: var(--s-1) var(--s-4) var(--s-4) calc(var(--s-4) + 60px);
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 1px;
  color: var(--ink-dim); opacity: 0.55;
}


@media (max-width: 720px) {
  .lrn-headside { align-items: flex-start; }
  .lrn-course-head { grid-template-columns: max-content 1fr max-content; gap: var(--s-3); }
  .lrn-progress { grid-column: 2 / -1; grid-row: 2; }
  .lrn-bar { flex: 1; width: auto; max-width: 220px; }
  .lrn-idx { width: 38px; height: 38px; }
  .lrn-topics { padding-left: calc(var(--s-4) + 34px); }
  .lrn-topics::before { left: calc(var(--s-4) + 8px); }
  .lrn-topic-dot { left: calc(-26px - 4px); }
  .lrn-mod-arrow { display: none; }
  .lrn-sem-meta { display: none; }
  .lrn-empty { padding-left: calc(var(--s-4) + 34px); }
}


@media (prefers-reduced-motion: reduce) {
  .lrn-course-body, .lrn-course-inner, .lrn-bar i,
  .lrn-chev, .lrn-mod, .lrn-mod-arrow,
  .lrn-master-body, .lrn-master-chev,
  .lrn-sem-body, .lrn-sem-chev,
  .lrn-topic-body, .lrn-topic-chev { transition: none; }
}






.lrn-pathview { display: flex; flex-direction: column; gap: clamp(36px, 6vw, 56px); }
.lrn-pathview[hidden] { display: none; }

#lernen .pv-sem { display: flex; flex-direction: column; gap: 0; }
#lernen .pv-sem-head { display: flex; align-items: center; gap: 18px; font-family: var(--font-mono); }

#lernen .pv-sem-tag {
  appearance: none; cursor: pointer;
  position: relative; isolation: isolate; overflow: hidden;
  display: inline-flex; align-items: center; gap: 11px;
  font-family: var(--font-mono); font-size: 12.5px; font-weight: 600;
  letter-spacing: 1.5px; color: #dcffd4;
  padding: 10px 17px; white-space: nowrap; border-radius: 11px;
  border: 1px solid rgba(120, 255, 110, 0.34);
  background:
    linear-gradient(140deg, rgba(57, 255, 20, 0.12), rgba(57, 255, 20, 0.02) 52%),
    rgba(4, 12, 4, 0.64);
  -webkit-backdrop-filter: blur(13px) saturate(150%);
  backdrop-filter: blur(13px) saturate(150%);
  box-shadow:
    0 8px 26px rgba(0, 0, 0, 0.5),
    0 0 22px rgba(57, 255, 20, 0.10),
    inset 0 1px 0 rgba(150, 255, 140, 0.4),
    inset 0 0 24px rgba(57, 255, 20, 0.05);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6), 0 0 7px rgba(57, 255, 20, 0.28);
  transition: border-color 260ms ease, box-shadow 260ms ease,
              transform 260ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
#lernen .pv-sem-tag::before {
  content: ""; position: absolute; inset: 0; z-index: -1; border-radius: inherit;
  background: linear-gradient(180deg, rgba(220, 255, 210, 0.13), transparent 42%);
  pointer-events: none;
}
#lernen .pv-sem-tag:hover {
  transform: translateY(-1px);
  border-color: rgba(120, 255, 110, 0.6);
  box-shadow:
    0 12px 32px rgba(0, 0, 0, 0.55),
    0 0 32px rgba(57, 255, 20, 0.20),
    inset 0 1px 0 rgba(150, 255, 140, 0.55),
    inset 0 0 28px rgba(57, 255, 20, 0.08);
}
#lernen .pv-sem-tag:focus-visible { outline: 1px solid var(--green); outline-offset: 3px; }
#lernen .pv-sem-tag-chev {
  font-size: 10px; line-height: 1; color: var(--green); flex: none;
  text-shadow: 0 0 8px rgba(57, 255, 20, 0.6);
  transform: rotate(90deg);
  transition: transform 320ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
#lernen .pv-sem.is-collapsed .pv-sem-tag-chev { transform: rotate(0deg); }
#lernen .pv-sem-line { flex: 1; height: 1px; background: var(--line); }
#lernen .pv-sem-meta { font-size: 11px; letter-spacing: 1.5px; color: var(--ink-dim); white-space: nowrap; }


#lernen .pv-sem-body {
  display: grid; grid-template-rows: 1fr;
  transition: grid-template-rows 520ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
#lernen .pv-sem.is-collapsed .pv-sem-body { grid-template-rows: 0fr; }
#lernen .pv-sem-inner {
  min-height: 0;
  display: flex; flex-direction: column; gap: clamp(24px, 4vw, 40px);
  padding-top: clamp(24px, 4vw, 40px);
}


#lernen .pv-sem.is-collapsed .pv-sem-inner,
#lernen .pv-sem.is-animating .pv-sem-inner { overflow: hidden; }


#lernen .pv-course { display: flex; flex-direction: column; }
#lernen .pv-banner {
  position: sticky; top: 68px; z-index: 6;
  appearance: none; width: 100%; text-align: left; cursor: pointer;
  color: inherit; font: inherit;
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; overflow: hidden;
  padding: clamp(16px, 2.6vw, 24px) clamp(16px, 2.8vw, 28px);
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgba(8, 16, 8, 0.94), rgba(3, 7, 3, 0.94));
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 14px 44px rgba(0, 0, 0, 0.55);
  transition: border-color 220ms ease, box-shadow 220ms ease;
}
#lernen .pv-banner:hover { border-color: var(--green); box-shadow: 0 14px 44px rgba(0, 0, 0, 0.55), 0 0 24px rgba(57, 255, 20, 0.1); }
#lernen .pv-banner:focus-visible { outline: 1px solid var(--green); outline-offset: -1px; }
#lernen .pv-banner::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--green), transparent);
  opacity: 0.45;
}
#lernen .pv-b-lead { display: flex; align-items: center; gap: 16px; min-width: 0; position: relative; z-index: 1; }
#lernen .pv-b-chev {
  font-family: var(--font-mono); font-size: 18px; line-height: 1; flex: none;
  color: var(--green); text-shadow: 0 0 8px rgba(57, 255, 20, 0.5);
  transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
#lernen .pv-course.is-open .pv-b-chev { transform: rotate(90deg); }
#lernen .pv-b-left { display: flex; flex-direction: column; gap: 7px; min-width: 0; }


#lernen .pv-course-body {
  display: grid; grid-template-rows: 0fr;
  transition: grid-template-rows 500ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
#lernen .pv-course.is-open .pv-course-body { grid-template-rows: 1fr; }
#lernen .pv-course-inner { min-height: 0; overflow: hidden; }
#lernen .pv-b-eyebrow {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 2px;
  color: var(--green); opacity: 0.85;
}
#lernen .pv-b-title {
  font-size: clamp(19px, 3.2vw, 28px); font-weight: 500; margin: 0;
  letter-spacing: -0.4px; line-height: 1.15; color: #fff;
}
#lernen .pv-b-right {
  position: relative; z-index: 1; flex: none;
  display: flex; flex-direction: column; align-items: flex-end; gap: 7px;
  font-family: var(--font-mono);
}
#lernen .pv-b-count { font-size: 15px; color: var(--green); letter-spacing: 1px; text-shadow: 0 0 10px rgba(57, 255, 20, 0.4); }
#lernen .pv-b-count i { font-style: normal; color: var(--ink-dim); text-shadow: none; font-size: 12px; }
#lernen .pv-b-bar { width: 130px; height: 4px; background: rgba(57, 255, 20, 0.12); overflow: hidden; }
#lernen .pv-b-bar i {
  display: block; height: 100%; width: 0%;
  background: var(--green); box-shadow: 0 0 10px var(--green);
  transition: width 900ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
#lernen .pv-b-hint { font-size: 9px; letter-spacing: 1.5px; color: var(--ink-dim); }
#lernen .pv-b-num {
  position: absolute; right: 150px; top: 50%; transform: translateY(-50%);
  font-family: var(--font-mono); font-size: clamp(56px, 9vw, 88px); font-weight: 700;
  color: transparent; -webkit-text-stroke: 1px rgba(57, 255, 20, 0.16);
  letter-spacing: 2px; pointer-events: none; user-select: none;
}


#lernen .pv-area {
  position: relative;
  padding: clamp(44px, 7vw, 72px) 0 clamp(32px, 5vw, 56px);
  --zig: clamp(64px, 13vw, 150px);
}
#lernen .pv-wire { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
#lernen .pv-wire path { fill: none; stroke-linecap: round; }
#lernen .pv-wire-base { stroke: rgba(57, 255, 20, 0.18); stroke-width: 1.5; }
#lernen .pv-wire-pulse { stroke: var(--green); stroke-width: 1.5; opacity: 0.75; }

#lernen .pv-bits {
  position: absolute; z-index: 0; margin: 0;
  font-family: var(--font-mono); font-size: 11px; line-height: 1.8;
  letter-spacing: 1px; color: rgba(57, 255, 20, 0.5); opacity: 0.22;
  pointer-events: none; user-select: none; white-space: pre;
}
#lernen .pv-bits-l { left: 0; top: 14%; }
#lernen .pv-bits-r { right: 0; top: 52%; text-align: right; }

#lernen .pv-nodes {
  list-style: none; margin: 0; padding: 0; position: relative; z-index: 1;
  display: flex; flex-direction: column; gap: clamp(26px, 4vw, 40px);
}
#lernen .pv-row { display: flex; justify-content: center; }
#lernen .pv-row.side-l { --dx: calc(var(--zig) * -1); }
#lernen .pv-row.side-r { --dx: var(--zig); }
#lernen .pv-cell {
  position: relative; left: var(--dx);
  display: flex; flex-direction: column; align-items: center;
  max-width: 100%;
}


#lernen .pv-row { transition: opacity 550ms ease, transform 550ms cubic-bezier(0.2, 0.8, 0.2, 1); }
#lernen .lrn-pathview.js-reveal .pv-row:not(.in) { opacity: 0; transform: translateY(16px); }
#lernen .lrn-pathview.no-anim .pv-row { transition: none !important; }


#lernen .pv-node {
  appearance: none; border: 0; background: none; font: inherit; color: inherit;
  display: flex; flex-direction: column; align-items: center;
  text-decoration: none; cursor: pointer; padding: 0;
  -webkit-tap-highlight-color: transparent;
}
#lernen .pv-node:focus-visible { outline: 1px solid var(--green); outline-offset: 6px; }
#lernen .pv-node[aria-disabled="true"] { cursor: default; }

#lernen .pv-tile { position: relative; display: block; width: 118px; height: 84px; }
#lernen .pv-tile i {
  position: absolute; left: 50%; top: 50%;
  width: 70px; height: 70px; margin: -35px 0 0 -35px;
  transform: rotateX(56deg) rotateZ(45deg);
}
#lernen .pv-t-side {
  margin-top: -26px;
  background: #010301;
  border: 1px solid rgba(57, 255, 20, 0.12);
}
#lernen .pv-t-top {
  background:
    linear-gradient(135deg, rgba(57, 255, 20, 0.10), rgba(57, 255, 20, 0.02) 55%),
    linear-gradient(180deg, #0a140a, #050a05);
  border: 1px solid var(--line-strong);
  box-shadow: 0 0 22px rgba(57, 255, 20, 0.08);
  transition: border-color 220ms ease, box-shadow 220ms ease;
}
#lernen .pv-row.has-mat .pv-t-top::after {
  content: ""; position: absolute; left: 10%; right: 10%; bottom: 5px; height: 2px;
  background: var(--green); opacity: 0.5; box-shadow: 0 0 10px var(--green);
}
#lernen .pv-tnum {
  position: absolute; left: 50%; top: 42%;
  transform: translate(-50%, -60%);
  font-family: var(--font-mono); font-weight: 700; font-size: 21px;
  letter-spacing: 1px; color: var(--green);
  text-shadow: 0 0 14px rgba(57, 255, 20, 0.55);
  transition: transform 260ms cubic-bezier(0.2, 0.8, 0.2, 1), text-shadow 260ms ease;
}
#lernen .pv-node:hover .pv-t-top, #lernen .pv-node:focus-visible .pv-t-top {
  border-color: var(--green);
  box-shadow: 0 0 30px rgba(57, 255, 20, 0.22), inset 0 0 20px rgba(57, 255, 20, 0.08);
}
#lernen .pv-node:hover .pv-tnum, #lernen .pv-node:focus-visible .pv-tnum {
  transform: translate(-50%, -95%);
  text-shadow: 0 0 20px rgba(57, 255, 20, 0.9);
}
#lernen .pv-row.is-locked .pv-t-top { border: 1px dashed var(--line); background: linear-gradient(180deg, #070b07, #040704); box-shadow: none; }
#lernen .pv-row.is-locked .pv-tnum { color: var(--ink-dim); text-shadow: none; opacity: 0.8; }
#lernen .pv-row.is-locked .pv-node:hover .pv-t-top { border-color: var(--line); box-shadow: none; }
#lernen .pv-row.is-locked .pv-node:hover .pv-tnum { transform: translate(-50%, -60%); text-shadow: none; }

#lernen .pv-label {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: min(300px, 30vw);
  display: flex; flex-direction: column; gap: 5px;
}
#lernen .pv-row.side-l .pv-label { right: calc(100% + 18px); text-align: right; align-items: flex-end; }
#lernen .pv-row.side-r .pv-label { left: calc(100% + 18px); text-align: left; align-items: flex-start; }
#lernen .pv-l-title {
  font-size: clamp(15px, 2vw, 17px); font-weight: 500; line-height: 1.3;
  color: #fff; letter-spacing: -0.2px;
  transition: color 200ms ease;
}
#lernen .pv-node:hover .pv-l-title { color: var(--green); }
#lernen .pv-row.is-locked .pv-l-title { color: var(--ink-dim); }
#lernen .pv-row.is-locked .pv-node:hover .pv-l-title { color: var(--ink-dim); }
#lernen .pv-l-meta {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 1.5px;
  color: var(--ink-dim);
}
#lernen .pv-chip {
  border: 1px solid var(--line-strong); color: var(--green);
  padding: 1px 6px; font-size: 9px; letter-spacing: 1px; opacity: 0.85;
}
#lernen .pv-more {
  display: inline-block; color: var(--green);
  transition: transform 260ms cubic-bezier(0.2, 0.8, 0.2, 1);
}
#lernen .pv-row.is-open .pv-more { transform: rotate(180deg); }


#lernen .pv-panel {
  display: grid; grid-template-rows: 0fr;
  transition: grid-template-rows 420ms cubic-bezier(0.2, 0.8, 0.2, 1);
  width: min(460px, calc(100vw - 56px));
}
#lernen .pv-row.is-open .pv-panel { grid-template-rows: 1fr; }
#lernen .pv-panel-in {
  overflow: hidden; min-height: 0;
  opacity: 0; transform: translateY(-6px);
  transition: opacity 320ms ease 60ms, transform 320ms ease 60ms;
}
#lernen .pv-row.is-open .pv-panel-in { opacity: 1; transform: none; }
#lernen .pv-panel-pad { display: flex; flex-direction: column; gap: 8px; padding: 14px 2px 2px; }
#lernen .pv-mod {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px;
  border: 1px solid var(--line-strong);
  background: rgba(0, 8, 0, 0.72);
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: 0.5px;
  color: var(--ink); text-decoration: none;
  transition: border-color 200ms ease, color 200ms ease, transform 200ms ease, box-shadow 200ms ease;
}
#lernen .pv-mod:hover, #lernen .pv-mod:focus-visible {
  border-color: var(--green); color: var(--green);
  transform: translateX(4px); outline: none;
  box-shadow: 0 0 20px rgba(57, 255, 20, 0.16);
}
#lernen .pv-mod .mico { color: var(--green); flex: none; }
#lernen .pv-mod-arrow { margin-left: auto; color: var(--green); flex: none; transition: transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1); }
#lernen .pv-mod:hover .pv-mod-arrow { transform: translateX(5px); }

#lernen .pv-empty {
  position: relative; z-index: 1; margin: 0;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 2px;
  color: var(--ink-dim); opacity: 0.55; text-align: center;
  padding: clamp(20px, 4vw, 36px) 0;
}


@media (max-width: 760px) {
  #lernen .pv-area { --zig: 0px; }
  #lernen .pv-label {
    position: static; transform: none;
    width: auto; max-width: 270px; margin-top: 2px;
    text-align: center !important; align-items: center !important;
  }
  #lernen .pv-row.side-l .pv-label, #lernen .pv-row.side-r .pv-label { text-align: center; align-items: center; }
  #lernen .pv-l-meta { justify-content: center; }
  #lernen .pv-bits, #lernen .pv-b-num { display: none; }
  #lernen .pv-banner { flex-wrap: wrap; top: 58px; }
  #lernen .pv-b-right { flex-direction: row; align-items: center; gap: 10px; }
  #lernen .pv-b-bar { width: 90px; }
  #lernen .pv-sem-meta { display: none; }
}


@media (prefers-reduced-motion: reduce) {
  #lernen .pv-row { transition: none; }
  #lernen .lrn-pathview.js-reveal .pv-row:not(.in) { opacity: 1; transform: none; }
  #lernen .pv-wire-pulse { display: none; }
  #lernen .pv-course-body, #lernen .pv-b-chev,
  #lernen .pv-panel, #lernen .pv-panel-in, #lernen .pv-tnum,
  #lernen .pv-more, #lernen .pv-mod, #lernen .pv-b-bar i,
  #lernen .pv-sem-body, #lernen .pv-sem-tag, #lernen .pv-sem-tag-chev { transition: none; }
}