:root {
  --cell: 13px; /* box size */
  --gap: 3px; /* spacing */
  --fg: #333;
  --muted: #667085;
  --bg: #fff;
  /* Custom palette */
  --absent: #e74c3c; /* red */
  --late: #f1c40f; /* yellow */
  --present: #2ecc71; /* green */
  --default: #ebedf0; /* light grey */
  --weekend: #9ea0a4; /* deeper grey for weekends */
  --out: #ffffff; /* out-of-range boxes */
  --out-border: #f0f1f3; /* subtle border for out-of-range */
}

* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial;
  color: var(--fg);
  background: var(--bg);
}

.grid-container {
  /* display: none; /* or flex */
  gap: 8px;
  margin: 0 auto; /* centers the container itself */
  justify-content: center; /* centers items inside */
  text-align: center; /* optional: centers inline text */
}

/* Base (desktop) */
.grid-wrap {
  margin: 0 auto;
  width: fit-content;
  overflow: visible; /* show full content normally */
  -webkit-overflow-scrolling: touch;
}

/* Small screens: make the wrapper horizontally scrollable */
@media (max-width: 768px) {
  .grid-wrap {
    overflow-x: auto;
    overflow-y: hidden;
  }

  /* left-align so scrolling behaves naturally */
  .grid-container {
    justify-content: flex-start;
    padding-left: 12px;
    padding-right: 12px;
  }
}

#resultsTable table {
  max-width: 600px;
  width: 100%; /* responsive */
  margin: 0 auto; /* center */
  table-layout: auto; /* adjust column widths to content */
  font-size: 0.8em; /* slightly smaller text */
}

.heatmap {
  display: grid;
  grid-template-columns: auto 1fr; /* labels + grid */
  grid-template-rows: auto 1fr; /* months + days */
  column-gap: 6px;
  row-gap: 4px;
}

.months {
  grid-column: 2;
  grid-row: 1;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: var(--cell);
  column-gap: var(--gap);
  font-size: 11px;
  color: var(--muted);
  height: var(--cell);
  align-items: end; /* sits at bottom of its row */
}

.day-labels {
  grid-column: 1;
  grid-row: 2;
  display: grid;
  grid-template-rows: repeat(7, var(--cell));
  row-gap: var(--gap);
  align-content: start;
  font-size: 11px;
  color: var(--muted);
}

.grid {
  grid-column: 2;
  grid-row: 2;
  display: grid;
  grid-template-rows: repeat(7, var(--cell));
  gap: var(--gap);
}

.absent {
  background: var(--absent);
}
.late {
  background: var(--late);
}
.present {
  background: var(--present);
}
.weekend {
  background: var(--weekend) !important;
}
.out {
  background: var(--out) !important;
  box-shadow: inset 0 0 0 1px var(--out-border);
}

.tooltip {
  position: fixed !important;
  display: none;
  background: #111;
  color: #fff;
  font-size: 12px;
  padding: 6px 8px;
  border-radius: 4px;
  z-index: 99999 !important;
  white-space: nowrap;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
  pointer-events: none; /* so it doesn’t block mouse */
}

.legend {
  display: flex; /* keep swatches nicely inline */
  gap: 0.5rem; /* spacing between items */
  flex-wrap: wrap; /* wrap if screen is small */
  margin-top: 1rem; /* push it down below the heatmap */
}

.legend .swatch {
  width: var(--cell);
  height: var(--cell);
  border-radius: 2px;
}

/* the EDIT button to bring up the change student attendance dialog */
.edit-btn {
  margin-right: 2px;
  padding: 4px 8px;
  border: 1px solid blue;
  background: white;
  color: blue;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.edit-btn:hover {
  background: blue;
  color: white;
}

/* change student attendance dialog */
.dialog-overlay {
  display: none; /* hidden by default */
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  justify-content: center;
  align-items: center;
  z-index: 2000;
}

.dialog-box {
  background: white;
  padding: 20px;
  border-radius: 10px;
  width: 500px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}