:root {
  --bg: #10141c;
  --panel: #182030;
  --panel-2: #1f2a3d;
  --card: #253248;
  --card-hover: #2c3c56;
  --text: #e8edf6;
  --muted: #93a1b8;
  --accent: #5aa9ff;
  --danger: #ff7676;
  --radius: 10px;
}

* { box-sizing: border-box; }

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

.site-header {
  padding: 1.25rem 1rem 0.25rem;
  max-width: 100%;
}

.site-header h1 {
  margin: 0;
  font-size: 1.35rem;
  letter-spacing: 0.02em;
}

.hint {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.board {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1rem;
  overflow-x: auto;
  max-width: 100%;
}

.column {
  flex: 1 1 0;
  min-width: 260px;
  max-width: 420px;
  background: var(--panel);
  border: 1px solid #26314a;
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  padding: 0.75rem;
  gap: 0.65rem;
}

.column.drag-over {
  border-color: var(--accent);
  background: var(--panel-2);
}

.column-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.column-title {
  margin: 0;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.count {
  background: var(--card);
  color: var(--muted);
  border-radius: 999px;
  font-size: 0.75rem;
  padding: 0.1rem 0.5rem;
}

.cards {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-height: 72px;
  padding: 0.15rem;
}

.cards.empty::after {
  content: "No cards yet — add one below or drop a card here";
  display: block;
  border: 1px dashed #33415e;
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 0.82rem;
  padding: 1.1rem 0.75rem;
  text-align: center;
}

.card {
  background: var(--card);
  border: 1px solid #33415e;
  border-radius: var(--radius);
  padding: 0.6rem 0.65rem;
  cursor: grab;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
}

.card:hover { background: var(--card-hover); }
.card:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.card.dragging { opacity: 0.4; cursor: grabbing; }

.card-text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.35;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  flex: 1 1 auto;
}

.card-actions {
  display: flex;
  gap: 0.25rem;
  flex: 0 0 auto;
}

.icon-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
  border-radius: 6px;
  font-size: 0.72rem;
  padding: 0.15rem 0.35rem;
  cursor: pointer;
}

.icon-btn:hover { color: var(--text); border-color: #3d4c6b; }
.delete-btn:hover { color: var(--danger); border-color: var(--danger); }

.card-edit {
  width: 100%;
  font: inherit;
  font-size: 0.92rem;
  color: var(--text);
  background: #16203100;
  background-color: #1b2537;
  border: 1px solid var(--accent);
  border-radius: 6px;
  padding: 0.35rem 0.4rem;
  resize: vertical;
}

.drop-indicator {
  height: 3px;
  border-radius: 3px;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(90, 169, 255, 0.7);
  margin: -0.1rem 0;
  pointer-events: none;
}

.add-form {
  display: flex;
  gap: 0.4rem;
}

.add-input {
  flex: 1 1 auto;
  min-width: 0;
  font: inherit;
  font-size: 0.88rem;
  background: #141c2b;
  color: var(--text);
  border: 1px solid #33415e;
  border-radius: 8px;
  padding: 0.45rem 0.55rem;
}

.add-input::placeholder { color: #6d7c96; }
.add-input:focus { outline: none; border-color: var(--accent); }

.add-btn {
  flex: 0 0 auto;
  font: inherit;
  font-size: 0.85rem;
  background: var(--accent);
  color: #08111f;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  padding: 0.45rem 0.8rem;
  cursor: pointer;
}

.add-btn:hover { filter: brightness(1.1); }

@media (max-width: 760px) {
  .board {
    flex-direction: column;
    overflow-x: hidden;
  }
  .column {
    width: 100%;
    min-width: 0;
    max-width: none;
  }
}