:root {
  --bg: #f3f7f8;
  --card: #ffffff;
  --text: #1a2a30;
  --muted: #5b7078;
  --accent: #0d7f73;
  --danger: #bd3f3f;
  --border: #d5e2e7;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: radial-gradient(circle at top left, #e6f1f4, #f8fbfc 45%, #edf5f7);
  color: var(--text);
}
header {
  padding: 18px 22px;
  background: #0f3e4f;
  color: #f1f7fa;
}
header h1 { margin: 0; font-size: 22px; }
header p { margin: 6px 0 0; color: #d5e6ec; }
main { padding: 18px; display: grid; gap: 16px; }
.panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
}
.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
}
.card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.card strong { font-size: 20px; }
.card span { color: var(--muted); font-size: 12px; }
.card.large { grid-column: span 2; }
.layout-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: 1.2fr 1fr;
}
@media (max-width: 980px) {
  .layout-grid { grid-template-columns: 1fr; }
  .card.large { grid-column: span 1; }
}
.controls-row {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}
input, select, textarea, button {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
}
button {
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  border: none;
}
button.delete {
  background: var(--danger);
  width: auto;
}
.stack-form { display: grid; gap: 8px; }
#group-board {
  display: grid;
  gap: 12px;
}
.group-box {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
}
.group-head {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  align-items: center;
}
.room-grid {
  margin-top: 8px;
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}
.dropzone {
  min-height: 90px;
  border: 2px dashed #b5c9d1;
  border-radius: 8px;
  padding: 8px;
  background: #f9fcfd;
}
.dropzone.over {
  border-color: var(--accent);
  background: #e7f7f4;
}
.child-chip {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 8px;
  margin-bottom: 6px;
  cursor: grab;
  font-size: 13px;
}
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { border-bottom: 1px solid var(--border); padding: 8px; text-align: left; }
.simple-list { margin: 0; padding-left: 18px; max-height: 280px; overflow: auto; }
.meta-grid {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  margin-bottom: 10px;
}
.small-btn { width: auto; padding: 5px 7px; font-size: 12px; }