/* ============================================================
   Lern-Mindmap – app.css
   Palette: Kreativ Violett-Pink (#8b5cf6 -> #ec4899), luftig
   ============================================================ */

:root {
  --violet: #8b5cf6;
  --pink: #ec4899;
  --grad: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
  --grad-soft: linear-gradient(135deg, rgba(139,92,246,.14), rgba(236,72,153,.14));

  /* Hell */
  --bg: #faf5ff;
  --bg-2: #ffffff;
  --surface: #ffffff;
  --surface-2: #f6effe;
  --canvas-bg: #fdf7ff;
  --text: #2a1f3d;
  --text-soft: #6b5b86;
  --border: #ead9fb;
  --border-strong: #d9bdf6;
  --shadow: 0 10px 30px rgba(91, 33, 182, .12);
  --shadow-sm: 0 4px 14px rgba(91, 33, 182, .10);
  --danger: #e11d48;
  --danger-bg: #ffe4ec;
  --ring: #a855f7;
  --edge: #c79bf0;
  --node-text: #2a1f3d;
  --node-ink: #ffffff;

  --r-lg: 20px;
  --r-md: 14px;
  --r-sm: 10px;
  --space: 16px;
  --maxw: 1100px;
}

[data-theme="dark"] {
  --bg: #16111f;
  --bg-2: #1d1530;
  --surface: #221a36;
  --surface-2: #2b2042;
  --canvas-bg: #1a1330;
  --text: #f3ebff;
  --text-soft: #b9a6d6;
  --border: #3a2c57;
  --border-strong: #4d3a72;
  --shadow: 0 14px 36px rgba(0, 0, 0, .5);
  --shadow-sm: 0 6px 18px rgba(0, 0, 0, .4);
  --danger: #fb7185;
  --danger-bg: #41202c;
  --ring: #c084fc;
  --edge: #7c52b3;
  --node-text: #f3ebff;
  --node-ink: #ffffff;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  overflow-x: hidden;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--violet);
  color: #fff;
  padding: 10px 14px;
  border-radius: 0 0 var(--r-sm) 0;
  z-index: 200;
}
.skip-link:focus { left: 0; }

/* ---------- Topbar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px clamp(12px, 4vw, 24px);
  background: var(--grad);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand-mark {
  display: grid;
  place-items: center;
  width: 42px; height: 42px;
  border-radius: 12px;
  background: rgba(255,255,255,.18);
  color: #fff;
  flex: 0 0 auto;
}
.brand-text { min-width: 0; }
.brand h1 {
  margin: 0;
  font-size: clamp(1.05rem, 3.4vw, 1.35rem);
  font-weight: 800;
  letter-spacing: .2px;
}
.brand-sub {
  margin: 0;
  font-size: .8rem;
  opacity: .9;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 52vw;
}

.topbar-actions { display: flex; gap: 8px; flex: 0 0 auto; }
.btn-label { margin-left: 4px; }

/* ---------- Buttons ---------- */
.btn {
  appearance: none;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  font-size: .9rem;
  padding: 9px 14px;
  border-radius: var(--r-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: transform .12s ease, box-shadow .12s ease, background .15s ease, opacity .15s ease;
  white-space: nowrap;
}
.btn:hover { box-shadow: var(--shadow-sm); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: 3px solid var(--ring); outline-offset: 2px; }
.btn:disabled { opacity: .45; cursor: not-allowed; box-shadow: none; }

.btn-primary {
  background: var(--grad);
  color: #fff;
  border-color: transparent;
}
.btn-primary:hover { filter: brightness(1.05); }

.btn-ghost {
  background: rgba(255,255,255,.16);
  color: #fff;
  border-color: rgba(255,255,255,.35);
}
.topbar .btn-ghost:hover { background: rgba(255,255,255,.28); }

.toolbar .btn-ghost {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
}

.btn-danger {
  background: var(--danger-bg);
  color: var(--danger);
  border-color: transparent;
}
.btn-danger:hover { filter: brightness(.98); }

.btn-icon {
  padding: 9px 11px;
  background: rgba(255,255,255,.16);
  color: #fff;
  border-color: rgba(255,255,255,.35);
  font-size: 1rem;
  line-height: 1;
}
.toolbar .btn-icon,
.zoom-controls .btn-icon {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border-strong);
}
.ico { font-size: 1rem; line-height: 1; }

/* ---------- Main / Toolbar ---------- */
main {
  flex: 1 1 auto;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: var(--space) clamp(12px, 4vw, 24px) 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 0;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 10px;
  box-shadow: var(--shadow-sm);
}
.toolbar-spacer { flex: 1 1 auto; min-width: 4px; }

.selection-hint {
  margin: 0;
  font-size: .82rem;
  color: var(--text-soft);
  padding: 0 4px;
}

/* ---------- Canvas ---------- */
.canvas-wrap {
  position: relative;
  flex: 1 1 auto;
  min-height: 360px;
  height: clamp(360px, 62dvh, 760px);
  background: var(--canvas-bg);
  background-image:
    radial-gradient(circle at 18% 22%, rgba(139,92,246,.10), transparent 42%),
    radial-gradient(circle at 82% 78%, rgba(236,72,153,.10), transparent 42%);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  touch-action: none;
}

.canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
}
.canvas:active { cursor: grabbing; }
.canvas:focus-visible { outline: 3px solid var(--ring); outline-offset: -3px; }

.edge {
  fill: none;
  stroke: var(--edge);
  stroke-width: 2.5;
  stroke-linecap: round;
  opacity: .85;
}

.node-group { cursor: pointer; }
.node-rect {
  rx: 14;
  stroke: rgba(0,0,0,.06);
  stroke-width: 1;
  transition: filter .12s ease;
}
.node-group:hover .node-rect { filter: brightness(1.05); }
.node-group.is-selected .node-sel {
  stroke: var(--ring);
  stroke-width: 3.5;
  fill: none;
}
.node-label {
  font-family: inherit;
  font-weight: 700;
  fill: var(--node-ink);
  dominant-baseline: middle;
  text-anchor: middle;
  pointer-events: none;
  user-select: none;
}
.node-root .node-label { font-size: 16px; }

.zoom-controls {
  position: absolute;
  right: 12px;
  bottom: 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.zoom-controls .btn-icon { box-shadow: var(--shadow-sm); }

/* ---------- Empty State ---------- */
.empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 8px;
  padding: 24px;
  z-index: 5;
}
.empty-art { font-size: 3.2rem; }
.empty-state h2 { margin: 4px 0 0; font-size: 1.25rem; }
.empty-state p { margin: 0 0 8px; color: var(--text-soft); max-width: 36ch; }

/* ---------- Modals ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.modal[hidden] { display: none; }
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(26, 16, 40, .55);
  backdrop-filter: blur(2px);
}
.modal-card {
  position: relative;
  width: 100%;
  max-width: 520px;
  max-height: 88dvh;
  overflow: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
  animation: pop .16s ease;
}
.modal-card-sm { max-width: 420px; }
@keyframes pop {
  from { transform: translateY(8px) scale(.98); opacity: 0; }
  to { transform: none; opacity: 1; }
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
}
.modal-head h2 { margin: 0; font-size: 1.1rem; }
.modal-head .btn-icon {
  background: var(--surface-2);
  color: var(--text);
  border-color: var(--border);
}
.modal-body { padding: 18px; }
.modal-foot {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 14px 18px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

/* ---------- Fields ---------- */
.field {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: var(--bg-2);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  padding: 11px 13px;
}
.field:focus-visible { outline: 3px solid var(--ring); outline-offset: 1px; border-color: var(--violet); }
.lbl { display: block; font-weight: 700; margin-bottom: 6px; font-size: .9rem; }
.hint { margin: 10px 0 0; font-size: .8rem; color: var(--text-soft); }
.export-text {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: .88rem;
  resize: vertical;
  white-space: pre;
  overflow: auto;
}

.newmap-row {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.newmap-row .field { flex: 1 1 160px; }

/* ---------- Maps list ---------- */
.maps-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.map-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface-2);
}
.map-item.is-active { border-color: var(--violet); background: var(--grad-soft); }
.map-main {
  flex: 1 1 auto;
  min-width: 0;
  text-align: left;
  background: none;
  border: none;
  color: inherit;
  font: inherit;
  cursor: pointer;
  padding: 0;
}
.map-name { font-weight: 700; display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.map-meta { font-size: .78rem; color: var(--text-soft); }
.map-actions { display: flex; gap: 6px; flex: 0 0 auto; }
.map-actions .btn { padding: 7px 10px; font-size: .82rem; }

/* ---------- Color grid ---------- */
.color-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(56px, 1fr));
  gap: 10px;
}
.color-swatch {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--r-sm);
  border: 2px solid transparent;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform .12s ease;
}
.color-swatch:hover { transform: translateY(-2px); }
.color-swatch:focus-visible { outline: 3px solid var(--ring); outline-offset: 2px; }
.color-swatch.is-selected {
  border-color: var(--text);
}
.color-swatch.is-selected::after {
  content: "✓";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  text-shadow: 0 1px 2px rgba(0,0,0,.5);
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: calc(20px + env(safe-area-inset-bottom));
  transform: translateX(-50%) translateY(12px);
  background: var(--text);
  color: var(--bg);
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 600;
  font-size: .9rem;
  box-shadow: var(--shadow);
  z-index: 300;
  opacity: 0;
  transition: opacity .2s ease, transform .2s ease;
  max-width: calc(100vw - 32px);
  text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 560px) {
  .btn-label { display: none; }
  .toolbar { padding: 8px; }
  .toolbar .btn { padding: 8px 11px; font-size: .85rem; }
  .brand-sub { max-width: 40vw; }
  .canvas-wrap { height: clamp(320px, 56dvh, 600px); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
}