:root {
  --blue-900: #0b6089; --blue-700: #0075b2; --blue-50: #eaf4fb;
  --orange: #ee5024; --danger: #b3261e; --danger-bg: #fbe9e7;
  --ink: #1c2128; --muted: #4a5360; --subtle: #6b7682;
  --paper: #ffffff; --bg: #f1ece2; --board-line: rgba(11, 96, 137, .14);
  --col-bg: rgba(255, 255, 255, .55); --border: #dfe4ea;
  --font: "Source Sans 3", "Aptos", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --note-gelb: #fdf07a; --note-rosa: #ffb6c9; --note-gruen: #c8f29a; --note-blau: #a8dcf7; --note-orange: #ffc58b;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: var(--font); color: var(--ink); background: var(--bg);
  background-image: radial-gradient(rgba(0,0,0,.035) 1px, transparent 1px);
  background-size: 18px 18px;
  display: flex; flex-direction: column; min-height: 100vh;
}
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 14px 20px; background: var(--paper); border-bottom: 3px solid var(--blue-700);
  position: sticky; top: 0; z-index: 5; flex-wrap: wrap;
}
.topbar h1 { margin: 0; font-size: 1.35rem; color: var(--blue-900); letter-spacing: .01em; }
.topbar-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.btn {
  font: inherit; font-weight: 600; font-size: .95rem; padding: 8px 14px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--paper); color: var(--blue-900); cursor: pointer;
}
.btn:hover { background: var(--blue-50); }
.btn.primary { background: var(--blue-700); border-color: var(--blue-700); color: #fff; }
.btn.primary:hover { background: var(--blue-900); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--muted); }
.btn.ghost:hover { background: var(--blue-50); }
.btn.danger { background: var(--danger-bg); border-color: transparent; color: var(--danger); }
.btn.small { padding: 4px 8px; font-size: .85rem; }
.btn[hidden] { display: none; }

.board {
  flex: 1; display: grid; gap: 16px; padding: 20px;
  grid-template-columns: repeat(var(--cols, 4), minmax(200px, 1fr));
  overflow-x: auto; align-items: start;
}
.column {
  background: var(--col-bg); border: 1px dashed var(--board-line); border-radius: 14px;
  min-height: 60vh; display: flex; flex-direction: column;
}
.column.is-over { background: rgba(0, 117, 178, .08); border-style: solid; }
.column-head {
  display: flex; align-items: center; gap: 8px; padding: 12px 14px 8px;
  border-bottom: 2px solid var(--board-line);
}
.column-head h2 {
  margin: 0; font-size: 1rem; text-transform: uppercase; letter-spacing: .06em; color: var(--blue-900);
  flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; outline: none;
}
.column-head h2[contenteditable="true"] { white-space: normal; background: #fff; border-radius: 4px; padding: 2px 4px; }
.column-head .count { font-size: .8rem; color: var(--subtle); font-weight: 600; }
.column-head .hint { font-size: .72rem; color: var(--subtle); }
.column-menu { display: flex; gap: 2px; }
.icon-btn {
  border: 0; background: transparent; cursor: pointer; color: var(--subtle); font-size: 1rem;
  padding: 2px 6px; border-radius: 6px; line-height: 1;
}
.icon-btn:hover { background: var(--blue-50); color: var(--blue-900); }

.cards { flex: 1; padding: 14px 12px 22px; display: flex; flex-direction: column; gap: 14px; min-height: 120px; }
.empty { color: var(--subtle); font-size: .9rem; text-align: center; padding: 24px 8px; font-style: italic; }

.card {
  position: relative; padding: 14px 14px 16px; min-height: 92px; cursor: grab;
  background: var(--note-gelb); color: #222;
  box-shadow: 1px 3px 6px rgba(0,0,0,.18), 0 10px 18px -10px rgba(0,0,0,.25);
  transform: rotate(var(--tilt, 0deg));
  transition: transform .12s ease, box-shadow .12s ease;
  font-size: .98rem; line-height: 1.3;
  border-radius: 2px;
}
.card::before {   /* Klebestreifen */
  content: ""; position: absolute; left: 50%; top: -8px; width: 56px; height: 16px; margin-left: -28px;
  background: rgba(255,255,255,.45); border: 1px solid rgba(0,0,0,.05); transform: rotate(-1.5deg);
}
.card:hover { transform: rotate(0deg) scale(1.02); box-shadow: 2px 6px 14px rgba(0,0,0,.25); z-index: 2; }
.card.dragging { opacity: .45; }
.card.gelb { background: var(--note-gelb); } .card.rosa { background: var(--note-rosa); }
.card.gruen { background: var(--note-gruen); } .card.blau { background: var(--note-blau); }
.card.orange { background: var(--note-orange); }
.card .title { font-weight: 700; margin: 0 0 4px; word-wrap: break-word; }
.card .notes { margin: 0; font-size: .86rem; color: #3a3a3a; white-space: pre-line; max-height: 5.2em; overflow: hidden; }
.card .meta { margin-top: 8px; font-size: .72rem; color: #555; display: flex; justify-content: space-between; }
.card .del {
  position: absolute; right: 4px; top: 4px; border: 0; background: transparent; color: #6b4a00;
  cursor: pointer; font-size: 1rem; line-height: 1; padding: 2px 6px; border-radius: 4px; opacity: 0;
}
.card:hover .del { opacity: .8; } .card .del:hover { background: rgba(0,0,0,.1); opacity: 1; }
.placeholder { height: 92px; border: 2px dashed var(--blue-700); border-radius: 4px; background: rgba(0,117,178,.06); }

.status { min-height: 1.4em; margin: 0; padding: 6px 20px 12px; font-size: .85rem; color: var(--subtle); }
.status.error { color: var(--danger); }

dialog {
  border: 0; border-radius: 14px; padding: 22px 24px; width: min(480px, 92vw);
  box-shadow: 0 20px 60px rgba(0,0,0,.3); font-family: var(--font); color: var(--ink);
}
dialog::backdrop { background: rgba(10, 13, 17, .45); }
dialog h2 { margin: 0 0 14px; font-size: 1.15rem; color: var(--blue-900); }
dialog label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 12px; }
dialog input, dialog textarea, dialog select {
  display: block; width: 100%; margin-top: 4px; font: inherit; font-weight: 400; padding: 8px 10px;
  border: 1px solid var(--border); border-radius: 8px; background: #fff;
}
dialog textarea { resize: vertical; }
.colors { border: 0; padding: 0; margin: 0 0 12px; }
.colors legend { font-weight: 600; font-size: .9rem; padding: 0; margin-bottom: 6px; }
#colorPicker { display: flex; gap: 10px; }
.swatch { width: 32px; height: 32px; border-radius: 50%; border: 2px solid transparent; cursor: pointer; box-shadow: inset 0 0 0 1px rgba(0,0,0,.1); }
.swatch.selected { border-color: var(--blue-900); transform: scale(1.1); }
.dialog-actions { display: flex; gap: 8px; align-items: center; margin-top: 8px; }
.spacer { flex: 1; }
.muted { color: var(--subtle); font-size: .9rem; margin-top: -8px; }
.error { color: var(--danger); font-size: .9rem; }
.archive-list { list-style: none; padding: 0; margin: 0; max-height: 50vh; overflow: auto; }
.archive-list li { padding: 8px 0; border-bottom: 1px solid var(--border); font-size: .95rem; }
.archive-list li small { color: var(--subtle); display: block; }

@media (max-width: 760px) {
  .board { grid-template-columns: 1fr; }
  .column { min-height: 0; }
}