:root {
  --color-bg: #f2f5f9;
  --color-surface: #ffffff;
  --color-text: #16202b;
  --color-text-soft: #3c4a5a;
  --color-muted: #647186;
  --color-muted-2: #9aa6b6;
  --color-primary: #1d5fae;
  --color-primary-dark: #144a8a;
  --color-primary-900: #0f3a6b;
  --color-primary-bg: #e8f0fb;
  --color-primary-bg-2: #f4f8fd;
  --color-border: #e4e9f0;
  --color-success: #187a4a;
  --color-success-bg: #e2f5ea;
  --color-danger: #b3261e;
  --color-danger-bg: #fbe9e7;
  --color-amber: #b5720a;
  --color-amber-bg: #fbead0;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(16, 30, 54, .06);
  --shadow-md: 0 6px 20px -4px rgba(16, 30, 54, .14);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

h1 { font-size: 1.6rem; margin: 0 0 .3rem; letter-spacing: -.01em; }
h1 + .muted { margin-top: 0; margin-bottom: 1.5rem; }

/* ---------- Topnav ---------- */

.topbar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-height: 64px;
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 20;
  box-shadow: var(--shadow-sm);
}

.topbar .brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--color-text);
  white-space: nowrap;
  padding: .6rem 0;
}

.topbar .brand::before {
  content: "DA";
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-900));
  color: #fff;
  font-weight: 800;
  font-size: .82rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.topbar nav {
  display: flex;
  gap: .25rem;
  flex-wrap: wrap;
  flex: 1;
  padding: .5rem 0;
}

.topbar nav a {
  color: var(--color-muted);
  font-size: .92rem;
  font-weight: 500;
  padding: .5rem .85rem;
  border-radius: 999px;
}

.topbar nav a:hover { background: var(--color-bg); color: var(--color-text); text-decoration: none; }

.topbar nav a.active {
  background: var(--color-primary-bg);
  color: var(--color-primary);
}

.topbar .user-info {
  font-size: .85rem;
  color: var(--color-muted);
  display: flex;
  align-items: center;
  gap: .55rem;
  white-space: nowrap;
}

.topbar .user-info .avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--color-primary-bg);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: .78rem;
  flex-shrink: 0;
}

.topbar .user-info a { color: var(--color-muted); text-decoration: underline; }

/* ---------- Layout ---------- */

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 1.75rem 1.25rem 3rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.3rem 1.4rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

.card h2, .card h3 { margin-top: 0; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.1rem;
}

/* ---------- Badges / Chips ---------- */

.badge {
  display: inline-block;
  padding: .2rem .6rem;
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 700;
  background: var(--color-primary-bg);
  color: var(--color-primary);
}

.badge.success { background: var(--color-success-bg); color: var(--color-success); }
.badge.danger { background: var(--color-amber-bg); color: var(--color-amber); }

.progress-bar {
  height: 7px;
  background: var(--color-border);
  border-radius: 99px;
  overflow: hidden;
  margin: .5rem 0;
}

.progress-bar > div {
  height: 100%;
  background: var(--color-primary);
  border-radius: 99px;
}

.flash {
  background: var(--color-primary-bg-2);
  border: 1px dashed var(--color-primary);
  color: var(--color-text-soft);
  padding: .8rem 1.1rem;
  border-radius: var(--radius);
  margin-bottom: 1.2rem;
  font-size: .92rem;
}

form.stacked label {
  display: block;
  font-weight: 600;
  margin: .8rem 0 .3rem;
  font-size: .92rem;
}

form.stacked input[type="text"],
form.stacked input[type="email"],
form.stacked input[type="password"],
form.stacked input[type="number"],
form.stacked select,
form.stacked textarea {
  width: 100%;
  padding: .6rem .7rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: inherit;
  background: var(--color-surface);
}

form.stacked textarea { min-height: 140px; resize: vertical; }

.btn {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  border: none;
  padding: .62rem 1.15rem;
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 1rem;
}

.btn:hover { background: var(--color-primary-dark); text-decoration: none; }

.btn.secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

.btn.secondary:hover { background: var(--color-bg); }

.btn.danger { background: var(--color-danger); }

.btn-row { display: flex; gap: .6rem; flex-wrap: wrap; align-items: center; }

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  text-align: left;
  padding: .55rem .6rem;
  border-bottom: 1px solid var(--color-border);
  font-size: .93rem;
}

.muted { color: var(--color-muted); font-size: .9rem; }

.article-content, .chapter-content {
  white-space: pre-wrap;
}

.choice-row {
  display: flex;
  gap: .5rem;
  align-items: center;
  margin: .4rem 0;
}

.quiz-question {
  border-top: 1px solid var(--color-border);
  padding-top: 1rem;
  margin-top: 1rem;
}

.filter-bar {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.filter-bar input, .filter-bar select {
  padding: .5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

/* ================================================================
   Neue Komponenten (Dashboard, Kursliste, Freigabe-Übersicht)
   ================================================================ */

/* --- Hero / "Weiter lernen" --- */

.hero {
  background: linear-gradient(120deg, var(--color-primary-900), var(--color-primary));
  border-radius: var(--radius-lg);
  padding: 1.6rem 1.8rem;
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-md);
  flex-wrap: wrap;
}

.hero .eyebrow {
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: #bcd3f2;
  font-weight: 700;
  margin-bottom: .3rem;
}

.hero h2 { margin: 0 0 .3rem; font-size: 1.3rem; }
.hero p { margin: 0; color: #d6e4f7; font-size: .92rem; max-width: 46ch; }

.hero .hero-actions { display: flex; align-items: center; gap: 1.1rem; }

.hero .btn { background: #fff; color: var(--color-primary); margin-top: 0; }
.hero .btn:hover { background: #eaf1fb; }

.progress-ring {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: conic-gradient(#fff calc(var(--pct, 0) * 1%), rgba(255, 255, 255, .28) 0);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.progress-ring span {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: var(--color-primary-900);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: .92rem;
  color: #fff;
}

/* --- Panels (Dashboard-Kacheln, etwas kompakter als .card) --- */

.panel-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.1rem; margin-bottom: 1.1rem; }
.panel-grid.cols-2 { grid-template-columns: 2fr 1fr; }
@media (max-width: 860px) { .panel-grid, .panel-grid.cols-2 { grid-template-columns: 1fr; } }

.panel h3 { margin: 0 0 .2rem; font-size: 1.02rem; }
.panel .meta { color: var(--color-muted); font-size: .85rem; margin: 0 0 .8rem; }
.panel .link-out { font-size: .85rem; font-weight: 600; color: var(--color-primary); margin-top: .8rem; display: inline-block; }

.mini-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: .5rem; }
.mini-list li { display: flex; justify-content: space-between; align-items: center; gap: .5rem; font-size: .88rem; }

/* --- Toolbar: Suche + Filter (Kursliste, Freigaben) --- */

.toolbar {
  display: flex;
  gap: .7rem;
  align-items: center;
  flex-wrap: wrap;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: .7rem .8rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

.search {
  flex: 1;
  min-width: 180px;
  display: flex;
  align-items: center;
  gap: .5rem;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: .5rem .8rem;
}

.search input {
  border: none;
  background: transparent;
  outline: none;
  font-size: .92rem;
  flex: 1;
  color: var(--color-text);
  font-family: inherit;
}

.chip-row { display: flex; gap: .4rem; flex-wrap: wrap; margin-bottom: 1.1rem; }

.chip {
  font-size: .82rem;
  padding: .4rem .8rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-soft);
  cursor: pointer;
  white-space: nowrap;
}

.chip.active { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

.status-toggle { display: flex; background: var(--color-bg); border-radius: 999px; padding: .2rem; gap: .2rem; }

.status-toggle button {
  border: none;
  background: transparent;
  padding: .4rem .8rem;
  border-radius: 999px;
  font-size: .82rem;
  color: var(--color-muted);
  cursor: pointer;
  font-family: inherit;
}

.status-toggle button.active { background: var(--color-surface); color: var(--color-text); box-shadow: var(--shadow-sm); font-weight: 600; }

/* --- Kurs-Karten-Grid --- */

.course-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
@media (max-width: 960px) { .course-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .course-grid { grid-template-columns: 1fr; } }

.course-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.1rem;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  box-shadow: var(--shadow-sm);
  transition: transform .12s, box-shadow .12s;
}

.course-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.course-card .top-row { display: flex; justify-content: space-between; align-items: flex-start; gap: .5rem; flex-wrap: wrap; }
.course-card h3, .course-card h4 { margin: 0; font-size: 1rem; line-height: 1.3; }
.course-card .desc { font-size: .85rem; color: var(--color-muted); margin: 0; flex: 1; }
.course-card .foot { display: flex; justify-content: space-between; align-items: center; font-size: .78rem; color: var(--color-muted); gap: .5rem; }

.section-heading {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin: 1.7rem 0 .8rem;
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--color-muted);
}

.section-heading::after { content: ""; flex: 1; height: 1px; background: var(--color-border); }
.course-group:first-of-type .section-heading { margin-top: 0; }

/* --- Statistik-Kacheln (Freigabe-Übersicht) --- */

.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; margin-bottom: 1.4rem; }
@media (max-width: 860px) { .stat-row { grid-template-columns: repeat(2, 1fr); } }

.stat {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  box-shadow: var(--shadow-sm);
}

.stat .num { font-size: 1.5rem; font-weight: 700; }
.stat .lbl { font-size: .8rem; color: var(--color-muted); }

/* --- Gruppierte, einklappbare Kategorien (Freigabe-Übersicht) --- */

details.cat-group {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: .7rem;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

details.cat-group[open] { box-shadow: var(--shadow-md); }

details.cat-group summary {
  list-style: none;
  cursor: pointer;
  padding: .85rem 1.1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  font-size: .94rem;
}

details.cat-group summary::-webkit-details-marker { display: none; }

details.cat-group summary::before {
  content: "▸";
  color: var(--color-muted-2);
  margin-right: .6rem;
  font-size: .8rem;
  display: inline-block;
  transition: transform .12s;
}

details.cat-group[open] summary::before { transform: rotate(90deg); }

details.cat-group summary .n {
  font-weight: 500;
  font-size: .8rem;
  color: var(--color-muted);
  background: var(--color-bg);
  padding: .15rem .55rem;
  border-radius: 999px;
}

.cat-body { border-top: 1px solid var(--color-border); padding: .4rem; }

.freigabe-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding: .8rem .8rem;
  border-radius: var(--radius-sm);
  flex-wrap: wrap;
}

.freigabe-row:hover { background: var(--color-bg); }
.freigabe-row .title { font-weight: 600; font-size: .95rem; }
.freigabe-row .meta-line { font-size: .8rem; color: var(--color-muted); margin-top: .15rem; }
.freigabe-row .hinweis-liste { list-style: none; margin: .5rem 0 0; padding: 0; font-size: .85rem; color: var(--color-text-soft); }
.freigabe-row .hinweis-liste li { margin: .2rem 0; padding-left: .9rem; position: relative; }
.freigabe-row .hinweis-liste li::before { content: "—"; position: absolute; left: 0; color: var(--color-amber); }
.freigabe-row .actions { display: flex; gap: .5rem; flex-shrink: 0; align-items: flex-start; }

.btn-sm {
  font-size: .82rem;
  padding: .4rem .85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  cursor: pointer;
  font-weight: 600;
  font-family: inherit;
}

.btn-sm.primary { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

.hinweis-count {
  font-size: .72rem;
  font-weight: 700;
  color: var(--color-amber);
  background: var(--color-amber-bg);
  padding: .15rem .5rem;
  border-radius: 999px;
  white-space: nowrap;
}

.note-callout {
  background: var(--color-primary-bg-2);
  border: 1px dashed var(--color-primary);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  font-size: .88rem;
  color: var(--color-text-soft);
  margin-bottom: 1.4rem;
}

.note-callout b { color: var(--color-primary); }

@media (max-width: 480px) {
  .topbar { padding: 0 .8rem; }
  .container { padding: 1.1rem .8rem 2.5rem; }
}