*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --panel-width: 320px;
  --color-bg: #f0f4f8;
  --color-panel: #ffffff;
  --color-accent: #1976d2;
  --color-text: #1e2a3a;
  --color-muted: #546780;
  --color-border: #c5d0de;
  font-family: 'Segoe UI', system-ui, sans-serif;
}

body {
  height: 100dvh;
  overflow: hidden;
  background: var(--color-bg);
  color: var(--color-text);
}

#app {
  display: grid;
  grid-template-columns: var(--_col-log, 300px) 1fr var(--_col-settings, 0);
  grid-template-rows: auto 1fr auto;
  height: 100dvh;
}

/* ── Sidebar (Slide-over von rechts) ─────────────────────── */
#panel {
  grid-column: 3;
  grid-row: 1 / 3;
  background: var(--color-panel);
  border-left: 1px solid var(--color-border);
  overflow-y: auto;
  overflow-x: hidden;
  min-width: 0;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

#app.log--collapsed {
  --_col-log: 0;
}

#app.settings--open {
  --_col-settings: var(--panel-width);
}

/* ── Schrittprotokoll-Panel (permanente linke Spalte) ───── */
.log-panel {
  grid-column: 1;
  grid-row: 1 / 3;
  background: var(--color-panel);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}

.log-panel__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.1rem 1rem 0.9rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--color-text);
  flex-shrink: 0;
}

.log-panel__toggle {
  background: none;
  border: none;
  color: var(--color-muted);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 0.25rem 0.4rem;
  border-radius: 3px;
  line-height: 1;
  transition: color 0.15s, background 0.15s;
  flex-shrink: 0;
}

.log-panel__toggle:hover {
  color: var(--color-text);
  background: rgba(0,0,0,0.07);
}

.log-panel__scenario {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.log-panel__scenario-name {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.3rem;
}

.log-panel__scenario-desc {
  font-size: 0.8rem;
  color: var(--color-muted);
  line-height: 1.45;
}

.log-panel__list {
  list-style: none;
  overflow-y: auto;
  flex: 1;
  padding: 0.35rem 0;
  scroll-behavior: smooth;
}

.log-entry {
  display: grid;
  grid-template-columns: 2rem auto 1fr;
  align-items: start;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  border-left: 3px solid transparent;
  transition: background 0.1s;
}

.log-entry--active {
  background: rgba(25, 118, 210, 0.1);
  border-left-color: #1976d2;
}

.log-entry__num {
  font-size: 0.68rem;
  color: var(--color-muted);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.log-entry__type {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.12em 0.4em;
  border-radius: 3px;
  white-space: nowrap;
  background: var(--color-accent);
  color: #fff;
  justify-self: start;
}

.log-entry__type[data-type="init"]                  { background: #34495e; }
.log-entry__type[data-type="assign-point-distance"] { background: #7d6008; }
.log-entry__type[data-type="assign-point"]          { background: #1a5276; }
.log-entry__type[data-type="update-move"]           { background: #6e2f8a; }
.log-entry__type[data-type="update"]                { background: #6e2f8a; }
.log-entry__type[data-type="converged"]             { background: #1e5e3a; }
.log-entry__type[data-type="vq-init"]               { background: #34495e; }
.log-entry__type[data-type="vq-nearest"]            { background: #1a5276; }
.log-entry__type[data-type="vq-move"]               { background: #6e2f8a; }
.log-entry__type[data-type="vq-done"]               { background: #1e5e3a; }
.log-entry__type[data-type="vq-distance"]           { background: #7d6008; }

.log-entry__desc {
  font-size: 0.75rem;
  color: var(--color-muted);
  line-height: 1.35;
  word-break: break-word;
  overflow-wrap: break-word;
}

.panel__header {
  padding: 1.25rem 1rem 1rem;
  border-bottom: 1px solid var(--color-border);
}

.panel__title {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--color-text);
}

.panel__section {
  padding: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.panel__label {
  display: block;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
  margin-bottom: 1rem;
}

.panel__select {
  width: 100%;
  padding: 0.45rem 0.6rem;
  background: #ffffff;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 0.9rem;
  cursor: pointer;
}

.panel__select:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

.panel__info-placeholder {
  color: var(--color-muted);
  font-size: 0.85rem;
}

.panel__scenario-name {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.panel__scenario-desc {
  font-size: 0.85rem;
  color: var(--color-muted);
  line-height: 1.5;
  margin-bottom: 0.75rem;
}

.panel__scenario-meta {
  font-size: 0.75rem;
  color: var(--color-muted);
}

.panel__scenario-meta code {
  font-size: 0.7rem;
  background: #e8edf3;
  padding: 0.1em 0.3em;
  border-radius: 3px;
}

/* ── Karte ───────────────────────────────────────────────── */
#map {
  grid-column: 2;
  grid-row: 2;
  min-height: 0; /* wichtig: verhindert Overflow im Grid */
}
/* Kartenkacheln abdunkeln und entsättigen, damit Datenpunkte hervorstechen */
.leaflet-tile-pane {
  /* filter: brightness(0.75) grayscale(0.15); */
}
/* ── Steuerleiste ────────────────────────────────────────── */
#controls {
  grid-column: 1 / -1;
  grid-row: 3;
  background: var(--color-panel);
  border-top: 1px solid var(--color-border);
}

.controls {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1rem 1.5rem;
  flex-wrap: wrap;
  min-height: 4.5rem;
}

/* k-Eingabe */
.controls__k {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.controls__k-input {
  width: 3.8rem;
  padding: 0.45rem 0.5rem;
  background: #ffffff;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 0.95rem;
  text-align: center;
}

.controls__btn-rerun {
  padding: 0.5rem 0.9rem;
  background: var(--color-accent);
  color: #fff;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 0.9rem;
  cursor: pointer;
  white-space: nowrap;
}

.controls__btn-rerun:hover {
  background: #1565c0;
}

/* Navigationsbuttons */
.controls__nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.controls__btn {
  height: 2.8rem;
  padding: 0 1rem;
  background: var(--color-accent);
  color: #fff;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 0.9rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}

.controls__btn:hover {
  background: #1565c0;
}

.controls__btn--play {
  height: 3rem;
  padding: 0 1.2rem;
  font-size: 0.95rem;
  background: #1976d2;
  border-color: #1565c0;
}

.controls__btn--play:hover {
  background: #1565c0;
}

/* Schritt-Info */
.controls__info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.controls__counter {
  font-size: 0.9rem;
  color: var(--color-text);
  white-space: nowrap;
}

.controls__type {
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.2em 0.65em;
  border-radius: 3px;
  white-space: nowrap;
  background: var(--color-accent);
  color: #fff;
}

.controls__type[data-type="init"]                    { background: #34495e; }
.controls__type[data-type="assign-point-distance"]   { background: #7d6008; }
.controls__type[data-type="assign-point"]            { background: #1a5276; }
.controls__type[data-type="update-move"]             { background: #6e2f8a; }
.controls__type[data-type="update"]                  { background: #6e2f8a; }
.controls__type[data-type="converged"]               { background: #1e5e3a; }
.controls__type[data-type="vq-init"]                 { background: #34495e; }
.controls__type[data-type="vq-distance"]             { background: #7d6008; }
.controls__type[data-type="vq-nearest"]              { background: #1a5276; }
.controls__type[data-type="vq-move"]                 { background: #6e2f8a; }
.controls__type[data-type="vq-done"]                 { background: #1e5e3a; }

.controls__desc-text {
  font-size: 0.9rem;
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Geschwindigkeit */
.controls__speed {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
}

.controls__label {
  font-size: 0.9rem;
  color: var(--color-muted);
  white-space: nowrap;
}

.controls__speed-label {
  font-size: 0.75rem;
  color: var(--color-muted);
  width: 2.5rem;
}

.controls__check-label {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.85rem;
  color: var(--color-muted);
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
}

/* ── Toolbar: Icon-Buttons ───────────────────────────────── */
.controls__icon-btn {
  height: 2.8rem;
  padding: 0 1rem;
  background: var(--color-accent);
  color: #fff;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  white-space: nowrap;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  user-select: none;
  line-height: 1;
}

#btn-open-settings {
  margin-right: 20px;
  font-size: 2rem;
}

#app.settings--open #btn-open-settings {
  background: #1565c0;
  border-color: #1976d2;
  color: #fff;
}

.controls__icon-btn:hover {
  background: #1565c0;
}

/* Log-Toggle-Button leuchtet, wenn Log sichtbar ist */
#app:not(.log--collapsed) #btn-log-toggle {
  background: #1565c0;
  border-color: #1976d2;
  color: #fff;
}

.controls__actions {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-shrink: 0;
  margin-left: auto;
}

/* ── Szenario-Panel: Aktions-Buttons ─────────────────────── */
.panel__section--actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.panel__btn-action {
  width: 100%;
  padding: 0.55rem 0.75rem;
  background: var(--color-accent);
  color: #fff;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 0.85rem;
  cursor: pointer;
  text-align: center;
}

.panel__btn-action:hover {
  background: #1565c0;
}

.panel__btn-action:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  background: var(--color-accent);
}

.panel__copy-feedback {
  margin-top: 0.4rem;
  font-size: 0.8rem;
  color: var(--color-accent);
  text-align: center;
}

/* ── Szenario-Panel: Neu-Button ──────────────────────────── */
.panel__btn-new {
  width: 100%;
  padding: 0.55rem 0.75rem;
  background: transparent;
  color: var(--color-text);
  border: 1px dashed var(--color-border);
  border-radius: 4px;
  font-size: 0.85rem;
  cursor: pointer;
  text-align: center;
  transition: border-color 0.15s, background 0.15s;
}

.panel__btn-new:hover {
  background: #1565c0;
  border-color: #1565c0;
  color: #fff;
}

.panel__check-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--color-muted);
  cursor: pointer;
  user-select: none;
  margin-top: 0.3rem;
}

.panel__check-label input {
  accent-color: var(--color-accent, #5ba4f5);
  cursor: pointer;
}

.panel__algo-selector {
  display: flex;
  gap: 1rem;
  margin-top: 0.3rem;
}

.panel__algo-label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--color-muted);
}

.panel__algo-label input {
  accent-color: var(--color-accent, #5ba4f5);
  cursor: pointer;
}

/* ── Szenario-Editor ─────────────────────────────────────── */
.editor__header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.editor__back-btn {
  padding: 0.2rem 0.5rem;
  background: transparent;
  color: var(--color-muted);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 0.8rem;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}

.editor__back-btn:hover {
  background: var(--color-accent);
  color: #fff;
}

.editor__input,
.editor__textarea,
.editor__k-input {
  width: 100%;
  padding: 0.4rem 0.55rem;
  background: #ffffff;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 0.85rem;
  font-family: inherit;
  resize: vertical;
}

.editor__input:focus,
.editor__textarea:focus,
.editor__k-input:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

.editor__k-input {
  width: 4rem;
  resize: none;
}

.editor__points-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.editor__btn-sm {
  padding: 0.15rem 0.5rem;
  background: transparent;
  color: var(--color-muted);
  border: 1px solid var(--color-border);
  border-radius: 3px;
  font-size: 0.75rem;
  cursor: pointer;
}

.editor__btn-sm:hover {
  background: #fde8e8;
  color: #c0392b;
  border-color: #c0392b;
}

.editor__point-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  max-height: 180px;
  overflow-y: auto;
  margin-bottom: 0.5rem;
}

.editor__point-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.4rem;
  background: #e8edf3;
  border-radius: 3px;
  font-size: 0.75rem;
}

.editor__point-num {
  font-weight: 700;
  color: var(--color-accent);
  min-width: 1.2rem;
  text-align: right;
}

.editor__point-coords {
  flex: 1;
  color: var(--color-muted);
  font-variant-numeric: tabular-nums;
}

.editor__point-del {
  background: transparent;
  color: var(--color-muted);
  border: none;
  cursor: pointer;
  font-size: 0.7rem;
  padding: 0.1rem 0.25rem;
  border-radius: 2px;
  line-height: 1;
}

.editor__point-del:hover {
  background: #fde8e8;
  color: #c0392b;
}

.editor__hint {
  font-size: 0.75rem;
  color: var(--color-muted);
  font-style: italic;
}

.editor__btn-download {
  width: 100%;
  padding: 0.55rem 0.75rem;
  background: var(--color-accent);
  color: #fff;
  border: 1px solid #1565c0;
  border-radius: 4px;
  font-size: 0.85rem;
  cursor: pointer;
}

.editor__btn-download:hover:not(:disabled) {
  background: #1565c0;
}

.editor__btn-download:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ── Editor-Suche ────────────────────────────────────────── */
.editor__search-row {
  display: flex;
  gap: 0.4rem;
}

.editor__search-row .editor__input {
  flex: 1;
  min-width: 0;
}

.editor__search-btn {
  padding: 0.4rem 0.7rem;
  background: var(--color-accent);
  color: #fff;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 0.8rem;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}

.editor__search-btn:hover {
  background: #1565c0;
}

.editor__search-status {
  font-size: 0.73rem;
  color: var(--color-muted);
  margin-top: 0.35rem;
  min-height: 1em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Kartencursor im Edit-Modus ──────────────────────────── */
.map--edit-mode {
  cursor: crosshair !important;
}

/* ── Editor-Datenpunkt-Marker ────────────────────────────── */
.edit-point-marker {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #f39c12;
  border: 2.5px solid #fff;
  box-shadow: 0 0 0 1.5px rgba(0,0,0,0.4), 0 2px 6px rgba(0,0,0,0.35);
  color: #1a1a2e;
  font-size: 0.65rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.centroid-marker {
  width: 18px;
  height: 18px;
  transform: rotate(45deg);
  border: 2.5px solid white;
  box-shadow: 0 0 0 1.5px rgba(0, 0, 0, 0.45), 0 2px 6px rgba(0, 0, 0, 0.35);
}

.centroid-marker--active {
  border-color: #f1c40f;
  box-shadow: 0 0 0 3px rgba(241, 196, 15, 0.55), 0 2px 8px rgba(0, 0, 0, 0.5);
  animation: centroid-pulse 0.65s ease-in-out infinite alternate;
}

@keyframes centroid-pulse {
  from { transform: rotate(45deg) scale(1.0); }
  to   { transform: rotate(45deg) scale(1.25); }
}

.centroid-marker--moving {
  border-color: #ffffff;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.4), 0 2px 10px rgba(0, 0, 0, 0.5);
  animation: centroid-move-pulse 0.4s ease-in-out infinite alternate;
}

.centroid-marker--ghost {
  background: transparent !important;
  opacity: 0.45;
  border-style: dashed;
}

@keyframes centroid-move-pulse {
  from { transform: rotate(45deg) scale(1.0); }
  to   { transform: rotate(45deg) scale(1.3); }
}

/* ── Szenario-Info-Banner (oben links, fixed) ─────────────── */
.scenario-banner {
  grid-column: 2;
  grid-row: 1;
  background: var(--color-panel);
  border-bottom: 1px solid var(--color-border);
  padding: 0.7rem 1rem;
  pointer-events: auto;
}

.scenario-banner__header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}

.scenario-banner__name {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
  flex: 1;
  min-width: 0;
}

.scenario-banner__algo-badge {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.15em 0.5em;
  border-radius: 3px;
  background: var(--color-accent);
  color: #fff;
  border: 1px solid #1565c0;
  white-space: nowrap;
  flex-shrink: 0;
  letter-spacing: 0.05em;
}

.scenario-banner__h5p-link {
  font-size: 0.68rem;
  font-weight: 600;
  padding: 0.15em 0.55em;
  border-radius: 3px;
  background: none;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  white-space: nowrap;
  flex-shrink: 0;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.scenario-banner__h5p-link:hover {
  background: var(--color-accent);
  color: #fff;
}

.scenario-banner__task-row {
  display: flex;
  align-items: flex-start;
  gap: 0.3rem;
}

.scenario-banner__info-btn {
  background: none;
  border: none;
  color: var(--color-muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 0.1rem 0.25rem;
  border-radius: 3px;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 0.5rem;
  transition: color 0.15s;
}

.scenario-banner__info-btn:hover,
.scenario-banner__info-btn--active {
  color: var(--color-accent);
}

.scenario-banner__task {
  font-size: 2rem;
  color: var(--color-text);
  line-height: 1.45;
}

.scenario-banner__desc {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--color-muted);
  line-height: 1.45;
  border-top: 1px solid var(--color-border);
  padding-top: 0.5rem;
}

/* ── Szenario-Banner: In-place-Editieren ──────────────────────── */
.app--editing .scenario-banner__name,
.app--editing .scenario-banner__task,
.app--editing .scenario-banner__desc {
  outline: none;
  border-bottom: 2px solid var(--color-accent);
  cursor: text;
  display: block;
  min-width: 2ch;
  white-space: pre-wrap;
}

.app--editing .scenario-banner__name:focus,
.app--editing .scenario-banner__task:focus,
.app--editing .scenario-banner__desc:focus {
  background: rgba(25, 118, 210, 0.06);
  border-radius: 2px 2px 0 0;
}

.app--editing .scenario-banner__name:empty::before {
  content: 'Name des Szenarios …';
  color: var(--color-muted);
  font-weight: normal;
  pointer-events: none;
}

.app--editing .scenario-banner__task:empty::before {
  content: 'Aufgabenstellung …';
  color: var(--color-muted);
  pointer-events: none;
}

.app--editing .scenario-banner__desc:empty::before {
  content: 'Beschreibung (optional) …';
  color: var(--color-muted);
  pointer-events: none;
}

.app--editing .scenario-banner__info-btn {
  display: none;
}

/* ── GitHub-Link (unten rechts, fixed) ─────────────────── */
.github-link {
  position: fixed;
  bottom: 1.7rem;
  right: 0.8rem;
  z-index: 900;
  color: var(--color-muted);
  opacity: 0.55;
  transition: opacity 0.15s, color 0.15s;
  line-height: 0;
  display: block;
}

.github-link:hover {
  opacity: 1;
  color: var(--color-text);
}