:root {
  --bg: #f6f4ef;
  --card: #fffdf8;
  --ink: #1d1d1f;
  --muted: #6b6b70;
  --line: #ddd8cc;
  --red: #c8102e;
  --black: #1d1d1f;
  --accent: #1f6f4a;
  --vul: #c8102e;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  /* Light only, form controls too, whatever the system's setting: spades and
     clubs are black and hearts and diamonds red, as on cards. */
  color-scheme: light;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); }
main { max-width: 980px; margin: 0 auto; padding: 16px; }
header h1 { margin: 0; font-size: 1.6rem; }
.sub { margin: 4px 0 16px; color: var(--muted); }
h2 { font-size: 1rem; margin: 0 0 8px; }

.controls { display: grid; gap: 8px; margin-bottom: 16px; }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
input, select, button { font: inherit; padding: 6px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--card); color: var(--ink); }
button { cursor: pointer; background: var(--accent); color: white; border-color: var(--accent); }
button[type="button"] { background: var(--card); color: var(--ink); border-color: var(--line); }
input.pbn { flex: 1 1 280px; min-width: 0; font-family: ui-monospace, Menlo, monospace; font-size: 0.9rem; }
label { display: inline-flex; gap: 6px; align-items: center; color: var(--muted); }

.error { color: var(--red); background: var(--card); border: 1px solid var(--red); padding: 8px 12px; border-radius: 6px; }

.board { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 24px; align-items: start; }
@media (max-width: 720px) { .board { grid-template-columns: 1fr; } }

.diagram {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 12px;
  overflow-x: auto;
}
/* A standard bridge diagram, centred in its card: West and East in columns of the
   same width (the wider hand's), right- and left-aligned against the compass, so
   the compass sits in the middle and both gaps match. The middle column is the
   compass's width; North and South, usually wider, stand centred over and under it
   and spill evenly into the columns either side. */
.dgrid {
  display: grid;
  grid-template-columns: minmax(8em, 1fr) 72px minmax(8em, 1fr);
  grid-template-rows: auto auto auto;
  width: max-content;
  margin: 0 auto;
  align-items: center;
  column-gap: 18px;
  row-gap: 10px;
}
.dgrid:has(.compass.playing) { grid-template-columns: minmax(8em, 1fr) 120px minmax(8em, 1fr); }
.pos0 { grid-column: 2; grid-row: 1; justify-self: unsafe center; width: max-content; }
.pos3 { grid-column: 1; grid-row: 2; justify-self: end; }
.pos1 { grid-column: 3; grid-row: 2; justify-self: start; }
.pos2 { grid-column: 2; grid-row: 3; justify-self: unsafe center; width: max-content; }
.compass {
  grid-column: 2; grid-row: 2;
  width: 72px; height: 72px; justify-self: center;
  display: grid; grid-template-columns: repeat(3, 1fr); grid-template-rows: repeat(3, 1fr);
  border: 1px solid var(--line); border-radius: 8px; color: var(--muted); font-size: 0.8rem;
}
.compass span { display: flex; align-items: center; justify-content: center; }
.compass .c0 { grid-column: 2; grid-row: 1; }
.compass .c1 { grid-column: 3; grid-row: 2; }
.compass .c2 { grid-column: 2; grid-row: 3; }
.compass .c3 { grid-column: 1; grid-row: 2; }
.hand { min-width: 0; font-variant-numeric: tabular-nums; }
.who { display: flex; gap: 6px; align-items: baseline; margin-bottom: 2px; font-size: 0.85rem; color: var(--muted); }
.who .name.vul { color: var(--vul); font-weight: 600; }
.who .dealer { border: 1px solid var(--muted); border-radius: 3px; padding: 0 3px; font-size: 0.7rem; }
.who .hcp::before { content: "· "; }
.suit { display: flex; gap: 6px; line-height: 1.45; white-space: nowrap; }
.sym { width: 1em; text-align: center; }
.s0, .s3 { color: var(--black); }
.s4 { color: var(--ink); }
.s1, .s2 { color: var(--red); }
.ranks { letter-spacing: 0.02em; }

/* At phone width there is no room for the compass between West and East: they sit
   side by side under North, centred, and the compass (in play) goes below South. */
@media (max-width: 480px) {
  .diagram { padding: 12px 8px; }
  .dgrid, .dgrid:has(.compass.playing) { grid-template-columns: auto auto; column-gap: 20px; }
  .pos0 { grid-column: 1 / span 2; grid-row: 1; justify-self: center; }
  .pos3 { grid-column: 1; grid-row: 2; justify-self: end; }
  .pos1 { grid-column: 2; grid-row: 2; justify-self: start; }
  .pos2 { grid-column: 1 / span 2; grid-row: 3; justify-self: center; }
  .compass { display: none; }
}

.analysis { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px; }
table.dd { border-collapse: collapse; font-variant-numeric: tabular-nums; width: 100%; max-width: 360px; }
table.dd th, table.dd td { padding: 6px 8px; text-align: center; border-bottom: 1px solid var(--line); }
table.dd thead th { font-size: 1.1rem; }
table.dd tbody th { color: var(--muted); font-weight: 600; text-align: left; }
table.dd td { font-size: 1.15rem; }
table.dd td.make { font-weight: 700; }
table.dd td.wait { color: var(--muted); }
.par { margin: 12px 0 4px; }
.meta { color: var(--muted); font-size: 0.85rem; margin: 4px 0; }
.wait { color: var(--muted); }
.pbn-out { font-size: 0.75rem; color: var(--muted); overflow-wrap: anywhere; margin: 8px 0 0; }
code { font-family: ui-monospace, Menlo, monospace; white-space: nowrap; }
.pbn-out code { white-space: normal; }

/* ---- Play ---- */
.left { display: grid; gap: 12px; min-width: 0; }
.rank { margin-right: 0.28em; }
.rank.gone { opacity: 0.3; text-decoration: line-through; }
.hand.mover .who .name { color: var(--accent); font-weight: 700; }
.hand.hidden .unseen { color: var(--muted); font-style: italic; padding: 8px 0; }
.group { display: inline-flex; flex-direction: column; align-items: center; border: 1px solid var(--line); border-radius: 6px; padding: 1px 2px 0; margin: 0 3px 3px 0; vertical-align: top; }
.group.best { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); }
.group .cards { display: inline-flex; gap: 1px; }
.group .rank.gone { margin: 0 2px; }
button.card { padding: 1px 4px; font-size: 1rem; background: var(--card); color: var(--ink); border: 1px solid transparent; border-radius: 4px; min-width: 1.6em; }
button.card:hover, button.card:focus-visible { border-color: var(--ink); }
.group .val { font-size: 0.7rem; color: var(--muted); line-height: 1.1; }
.group.best .val { color: var(--accent); font-weight: 700; }
.group .cost { color: var(--red); margin-left: 3px; font-weight: 700; }
.compass.playing { width: 120px; height: 120px; position: relative; }
.compass.playing span.played b { font-size: 1rem; }
.compass .last { opacity: 0.45; }
.compass .turn { color: var(--accent); font-weight: 700; }
.compass .mid { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 0.65rem; color: var(--muted); pointer-events: none; }
@media (max-width: 480px) {
  .compass.playing { display: grid; grid-column: 1 / span 2; grid-row: 4; justify-self: center; }
}
table.dd td { padding: 2px; }
button.cell { width: 100%; padding: 4px 0; font-size: 1.15rem; background: transparent; color: inherit; border: 1px solid transparent; font-weight: inherit; }
button.cell:hover { border-color: var(--line); }
td.chosen button.cell { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 15%, transparent); }
.hint { color: var(--muted); font-size: 0.85rem; }
.tabs { display: flex; gap: 4px; }
.tabs button { background: var(--card); color: var(--muted); border-color: var(--line); }
.tabs button.on { background: var(--accent); color: white; border-color: var(--accent); }
.pane { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px; display: grid; gap: 8px; }
.pane select { margin-left: 8px; padding: 2px 6px; }
.row.between { justify-content: space-between; }
.status { margin: 0; }
.muted { color: var(--muted); }
.small { font-size: 0.8rem; margin: 0; }
button:disabled { opacity: 0.45; cursor: default; }
ol.tricks { margin: 0; padding-left: 1.6em; font-size: 0.85rem; columns: 2; column-gap: 24px; }
ol.tricks li span { margin-right: 8px; white-space: nowrap; }
ol.tricks li span.won { font-weight: 700; text-decoration: underline; }
@media (max-width: 420px) { ol.tricks { columns: 1; } }

/* ---- Simulate ---- */
.rules { display: grid; gap: 6px; }
.rule select, .rule input { padding: 4px 6px; margin: 0; }
.progress { height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; }
.progress div { height: 100%; background: var(--accent); }
.stats { margin: 6px 0; font-size: 0.9rem; }
table.simrows { border-collapse: collapse; width: 100%; font-variant-numeric: tabular-nums; }
table.simrows th, table.simrows td { padding: 3px 6px; text-align: left; border-bottom: 1px solid var(--line); }
table.simrows thead th { font-size: 0.75rem; color: var(--muted); font-weight: 600; }
table.simrows td.num { text-align: right; width: 4.5em; }
table.simrows td.bar { width: 30%; }
table.simrows td.bar div { height: 10px; background: var(--accent); border-radius: 2px; }
table.simrows td.bar.makes div { background: #b08a2e; }
button.stop { background: var(--red); border-color: var(--red); }

.secret p { font-size: 0.9rem; }
button.reveal { background: var(--card); color: var(--ink); border-color: var(--line); margin-top: 8px; }

details.meta summary { cursor: pointer; list-style: none; }
details.meta summary::-webkit-details-marker { display: none; }
details.meta .more { text-decoration: underline; font-size: 0.8rem; margin-left: 4px; }
details.meta[open] .more { display: none; }
details.meta .times { margin: 4px 0 0; }