:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --border: #e2e5ea;
  --text: #1c2128;
  --text-muted: #5b6472;
  --accent: #2953b8;
  --accent-soft: #e8edfb;

  --status-offen: #9aa3af;
  --status-offen-bg: #eef0f3;
  --status-gesichtet: #2179c9;
  --status-gesichtet-bg: #e4f0fb;
  --status-verstanden: #b5790a;
  --status-verstanden-bg: #fbf0da;
  --status-bestanden: #2c8a4b;
  --status-bestanden-bg: #e4f5e9;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.45;
  overflow-x: hidden;
}

header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 20px 24px 0 24px;
  position: sticky;
  top: 0;
  z-index: 10;
}

header .header-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px;
  max-width: 1100px;
  margin: 0 auto;
}

h1 {
  font-size: 20px;
  margin: 0;
}

#countdown {
  font-size: 14px;
  color: var(--text-muted);
}

#countdown strong {
  color: var(--accent);
}

nav {
  max-width: 1100px;
  margin: 16px auto 0 auto;
  display: flex;
  gap: 4px;
}

nav button {
  border: none;
  background: transparent;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
}

nav button.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

main {
  max-width: 1100px;
  margin: 24px auto 80px auto;
  padding: 0 24px;
}

.view { display: none; }
.view.active { display: block; }

/* Landkarte bricht bewusst aus der 1100px-Spalte aus und nutzt die volle
   Fensterbreite - fühlt sich sonst wie ein enges Fenster an, keine Karte. */
#view-landkarte.active {
  width: 100vw;
  max-width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  padding: 0 20px;
  box-sizing: border-box;
}

/* Progress bar */
.progress-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  margin-bottom: 24px;
}

.progress-wrap .label {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.progress-bar {
  height: 8px;
  background: var(--status-offen-bg);
  border-radius: 4px;
  overflow: hidden;
  display: flex;
}

.progress-bar > div { height: 100%; }
.seg-gesichtet { background: var(--status-gesichtet); }
.seg-verstanden { background: var(--status-verstanden); }
.seg-bestanden { background: var(--status-bestanden); }

/* Section groups */
.group-title {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin: 28px 0 10px 0;
}

.group-title:first-child { margin-top: 0; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  margin-bottom: 10px;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
}

.card-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.card-title {
  font-size: 14.5px;
  font-weight: 600;
}

.subprogress-badge {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  background: var(--status-offen-bg);
  border-radius: 999px;
  padding: 2px 8px;
  white-space: nowrap;
}

.subprogress-badge.all-done {
  color: var(--status-bestanden);
  background: var(--status-bestanden-bg);
}

.card.flash {
  animation: flash-highlight 1.2s ease;
}

@keyframes flash-highlight {
  0% { box-shadow: 0 0 0 3px var(--accent); }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.status-pill {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
  border: none;
  cursor: pointer;
}

.status-pill.offen { color: var(--status-offen); background: var(--status-offen-bg); }
.status-pill.gesichtet { color: var(--status-gesichtet); background: var(--status-gesichtet-bg); }
.status-pill.in_arbeit { color: var(--status-gesichtet); background: var(--status-gesichtet-bg); }
.status-pill.verstanden { color: var(--status-verstanden); background: var(--status-verstanden-bg); }
.status-pill.bestanden { color: var(--status-bestanden); background: var(--status-bestanden-bg); }

.card-body {
  display: none;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.card.open .card-body { display: block; }

.card-info {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.card textarea {
  width: 100%;
  min-height: 60px;
  font-family: inherit;
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  resize: vertical;
  background: var(--bg);
  color: var(--text);
}

.card textarea::placeholder { color: #9aa3af; }

/* Unterthemen-Checkliste */
.subtopic-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.subtopic-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  cursor: pointer;
  padding: 3px 0;
}

.subtopic-row input[type="checkbox"] {
  margin-top: 3px;
  flex-shrink: 0;
  width: 15px;
  height: 15px;
  accent-color: var(--status-bestanden);
  cursor: pointer;
}

.subtopic-name {
  color: var(--text);
}

.subtopic-name.done {
  color: var(--text-muted);
  text-decoration: line-through;
}

.subtopic-empty-hint {
  font-size: 12.5px;
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: 14px;
}

.subtopic-group-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 6px;
}

/* Verknüpfungs-Chips innerhalb einer Karte */
.link-chip-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 14px;
}

.link-chip-label {
  font-size: 11.5px;
  color: var(--text-muted);
  margin-right: 2px;
}

.link-chip {
  font-size: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  border: none;
  border-radius: 999px;
  padding: 4px 10px;
  cursor: pointer;
  font-weight: 600;
}

.link-chip:hover {
  background: var(--accent);
  color: #fff;
}

.sub-label {
  margin-top: 6px;
  margin-bottom: 0;
  min-height: 14px;
}

.sub-label span {
  font-size: 12px;
}

/* Landkarte als Mindmap (horizontaler Baum + gestrichelte Querverbindungen) */
.mm-legend {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  font-size: 12.5px;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.mm-legend-line {
  display: inline-block;
  width: 22px;
  height: 0;
  border-top: 2px solid var(--text-muted);
  vertical-align: middle;
  margin-right: 5px;
}

.mm-legend-dashed { border-top-style: dashed; border-top-color: var(--accent); }

.mm-legend-hint { margin-left: auto; font-style: italic; }

.mindmap-viewport {
  position: relative;
  overflow: hidden;
  height: calc(100vh - 210px);
  min-height: 480px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  cursor: grab;
  touch-action: none;
  user-select: none;
}

.mindmap-viewport.dragging {
  cursor: grabbing;
}

.mindmap-canvas {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 0 0;
}

.mm-controls {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 10;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mm-controls button {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.mm-controls button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.tree-svg {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
}

.tree-edge {
  fill: none;
  stroke: #c7ccd4;
  stroke-width: 1.5;
}

.cross-link {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-dasharray: 5 4;
  opacity: 0.7;
}

.mm-node {
  position: absolute;
  transform: translateY(-50%);
  border-radius: 8px;
  padding: 7px 12px;
  font-size: 13px;
  line-height: 1.35;
  white-space: normal;
  word-wrap: break-word;
  box-sizing: border-box;
}

.mm-root {
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 13.5px;
  text-align: center;
  border-radius: 10px;
  padding: 10px 12px;
}

.mm-group {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-size: 11px;
  padding: 4px 2px;
}

.mm-item {
  background: var(--surface);
  border: 1.5px solid var(--border);
  cursor: pointer;
  font-weight: 600;
}

.mm-item:hover { border-color: var(--accent); }

.mm-item.status-offen { border-color: var(--status-offen); color: var(--status-offen); background: var(--status-offen-bg); }
.mm-item.status-gesichtet { border-color: var(--status-gesichtet); color: var(--status-gesichtet); background: var(--status-gesichtet-bg); }
.mm-item.status-verstanden { border-color: var(--status-verstanden); color: var(--status-verstanden); background: var(--status-verstanden-bg); }
.mm-item.status-bestanden { border-color: var(--status-bestanden); color: var(--status-bestanden); background: var(--status-bestanden-bg); }

.mm-concept {
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 11px;
  padding: 4px 8px;
}

footer {
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
  padding: 24px;
}