/* KCS hydrodynamic-data explorers (Chapter 6 radiation, Chapter 7 wave loads).
   Self-contained: the .sdof-* base classes are repeated here so the tool looks
   like the rest of the book's simulators wherever it is embedded. */

.sdof-app {
  margin: 1.5rem 0;
  border: 1px solid var(--bs-border-color, #ccc);
  border-radius: 0.5rem;
  padding: 1rem;
  background: var(--bs-body-bg, #fff);
}

.sdof-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem 1.25rem;
  align-items: end;
  margin-bottom: 0.75rem;
}

.sdof-control-group {
  display: flex;
  flex-direction: column;
  font-size: 0.9rem;
}

.sdof-control-group label { margin-bottom: 0.25rem; }
.sdof-control-group input[type="range"] { width: 100%; }

.sdof-control-group select {
  width: 100%;
  padding: 0.35rem 0.4rem;
  border-radius: 0.3rem;
  border: 1px solid var(--bs-border-color, #ccc);
  background: var(--bs-body-bg, #fff);
  color: var(--bs-body-color, #222);
  font-size: 0.9rem;
}

/* ---- button groups ---- */

.kcs-buttons {
  display: flex;
  gap: 0.4rem 1.1rem;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
  font-size: 0.88rem;
}

.kcs-btn-group {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.kcs-btn-group > span:first-child {
  color: var(--bs-secondary-color, #666);
  margin-right: 0.15rem;
}

.kcs-buttons button {
  padding: 0.3rem 0.7rem;
  border-radius: 0.35rem;
  border: 1px solid var(--bs-border-color, #ccc);
  background: var(--bs-tertiary-bg, #f0f0f0);
  color: var(--bs-body-color, #222);
  cursor: pointer;
  font-size: 0.86rem;
  line-height: 1.2;
}

.kcs-buttons button:hover { filter: brightness(0.95); }

.kcs-buttons button.kcs-active {
  background: #2c5282;
  border-color: #2c5282;
  color: #fff;
}

/* ---- legend chips ---- */

.kcs-legend {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-bottom: 0.6rem;
}

.kcs-chip {
  font-size: 0.83rem;
  padding: 0.2rem 0.6rem;
  border-radius: 0.35rem;
  border-left: 6px solid transparent;
  background: var(--bs-tertiary-bg, #f1f3f5);
}

.kcs-note {
  font-size: 0.85rem;
  color: var(--bs-secondary-color, #666);
  margin: -0.2rem 0 0.85rem;
  line-height: 1.45;
}

.kcs-status {
  font-size: 0.9rem;
  line-height: 1.55;
  margin-bottom: 0.85rem;
  padding: 0.55rem 0.75rem;
  border-left: 4px solid #2c5282;
  border-radius: 0.25rem;
  background: var(--bs-tertiary-bg, #f1f3f5);
  color: var(--bs-body-color, #333);
}

/* ---- schematic ---- */

.kcs-schematic-wrap { margin-bottom: 0.9rem; }

.kcs-schematic-wrap canvas {
  width: 100%;
  height: 230px;
  background: #eef3f7;
  border: 1px solid var(--bs-border-color, #ccc);
  border-radius: 0.4rem;
  display: block;
  touch-action: none;
}

/* ---- plot rows ---- */

.kcs-row {
  margin-bottom: 0.4rem;
}

.kcs-row-title {
  font-size: 0.9rem;
  font-weight: 600;
  margin: 0.3rem 0 0.35rem;
  color: var(--bs-body-color, #333);
}

.kcs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

@media (max-width: 720px) {
  .kcs-grid { grid-template-columns: 1fr; }
}

.kcs-panel canvas {
  width: 100%;
  height: 250px;
  background: #fff;
  border: 1px solid var(--bs-border-color, #ccc);
  border-radius: 0.4rem;
  display: block;
  touch-action: none;
}

.kcs-panel-title {
  margin-top: 0.3rem;
  font-size: 0.83rem;
  text-align: center;
  color: var(--bs-secondary-color, #555);
}

/* ---- matrix element picker (radiation tool) ---- */

.kcs-rad-controls {
  display: grid;
  grid-template-columns: auto minmax(220px, 1fr);
  gap: 0.75rem 2rem;
  align-items: start;
  margin-bottom: 0.75rem;
}

.kcs-rad-side {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

@media (max-width: 640px) {
  .kcs-rad-controls { grid-template-columns: 1fr; }
}

.kcs-matrix {
  display: grid;
  grid-template-columns: auto repeat(6, 2.4rem);
  grid-auto-rows: 2.2rem;
  gap: 3px;
  align-items: center;
  justify-items: center;
  font-size: 0.82rem;
  margin-bottom: 0.2rem;
}

.kcs-matrix .kcs-mhead {
  color: var(--bs-secondary-color, #666);
  font-size: 0.78rem;
}

.kcs-matrix button {
  width: 100%;
  height: 100%;
  border-radius: 0.3rem;
  border: 1px solid var(--bs-border-color, #ccc);
  background: var(--bs-tertiary-bg, #f0f0f0);
  color: var(--bs-body-color, #222);
  cursor: pointer;
  font-size: 0.8rem;
  font-variant-numeric: tabular-nums;
  padding: 0;
}

.kcs-matrix button.kcs-active {
  background: #2c5282;
  border-color: #2c5282;
  color: #fff;
}

/* ---- readout table ---- */

.kcs-table-wrap {
  overflow-x: auto;
  font-size: 0.83rem;
}

.kcs-table-wrap table {
  border-collapse: collapse;
  width: 100%;
  margin: 0;
}

.kcs-table-wrap th, .kcs-table-wrap td {
  padding: 0.3rem 0.5rem;
  border-bottom: 1px solid var(--bs-border-color, #ddd);
  text-align: right;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.kcs-table-wrap th { font-weight: 600; color: var(--bs-secondary-color, #555); }
.kcs-table-wrap th:first-child, .kcs-table-wrap td:first-child { text-align: left; }

.kcs-table-caption {
  font-size: 0.8rem;
  color: var(--bs-secondary-color, #666);
  margin: 0.3rem 0 0;
}

.kcs-swatch {
  display: inline-block;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 2px;
  margin-right: 0.4rem;
  vertical-align: -1px;
}