:root {
  --bg: #faf7f2;
  --ink: #3a2f27;
  --muted: #857466;
  --line: #e3d9cd;
  --accent: #7b4b2a;
  --accent-soft: #f0e5d8;
  --warn: #8a5a12;
  --warn-bg: #fdf3e0;
  --err: #8c2f22;
  --err-bg: #fbe9e6;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 2rem 1.25rem 4rem;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

header, main { max-width: 62rem; margin: 0 auto; }

h1 { margin: 0 0 .35rem; font-size: 1.7rem; letter-spacing: -.01em; }
h2 { font-size: 1.05rem; margin: 1.6rem 0 .4rem; }

.sub { margin: 0 0 2rem; color: var(--muted); max-width: 46rem; }

code {
  font: .87em/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  background: var(--accent-soft);
  padding: .12em .35em;
  border-radius: 3px;
}

.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.control {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1rem 1.1rem 1.1rem;
}

.control label {
  display: block;
  font-weight: 600;
  font-size: .9rem;
  margin-bottom: .55rem;
}

.control label.inline { display: inline; font-weight: 400; }

input[type="range"] { width: 100%; accent-color: var(--accent); }

output {
  display: inline-block;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--accent);
  margin-top: .2rem;
}

.hint {
  margin: .5rem 0 0;
  font-size: .8rem;
  color: var(--muted);
  line-height: 1.45;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  align-items: center;
  margin-bottom: 1.5rem;
}

button {
  font: inherit;
  font-size: .92rem;
  padding: .6rem 1.05rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  cursor: pointer;
}

button:hover:not(:disabled) { border-color: var(--accent); }
button:disabled { opacity: .5; cursor: default; }

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

#status { color: var(--muted); font-size: .88rem; }

table.compare {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}

.compare th, .compare td {
  padding: .6rem .9rem;
  text-align: right;
  font-variant-numeric: tabular-nums;
  border-bottom: 1px solid var(--line);
}

.compare thead th { background: var(--accent-soft); font-size: .85rem; }
.compare th[scope="row"] { text-align: left; font-weight: 500; white-space: nowrap; }
.compare tbody tr:last-child th, .compare tbody tr:last-child td { border-bottom: 0; }
.compare tbody tr:last-child td { font-size: .85rem; color: var(--muted); }

.note {
  font-size: .82rem;
  color: var(--muted);
  margin: .8rem 0 0;
  max-width: 46rem;
}

.caveat, .error {
  margin-top: 1rem;
  padding: .8rem 1rem;
  border-radius: 8px;
  font-size: .87rem;
  line-height: 1.5;
}

.caveat { background: var(--warn-bg); border: 1px solid #eddcbb; color: var(--warn); }
.error { background: var(--err-bg); border: 1px solid #f0c9c2; color: var(--err); }
.caveat ul { margin: .4rem 0 0; padding-left: 1.1rem; }

/* A method assumption is not a defect in the run — it is the price of the
   answer — so it is toned down rather than shown in the same warning amber as
   a constraint the engine could not enforce. */
.caveat.assumption {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
}

.explain { margin-top: 2.5rem; color: var(--muted); max-width: 46rem; font-size: .9rem; }
.explain h2 { color: var(--ink); }
.explain p { margin: .5rem 0 .9rem; }

/* The console is a table of numbers; it should stay readable on a phone.
   The table scrolls inside its own box rather than pushing the page sideways —
   but a clipped column with no cue just looks like missing data, so the wrapper
   fades its right edge while there is more to see. */
.table-scroll { position: relative; }

@media (max-width: 34rem) {
  body { padding: 1.25rem .9rem 3rem; }
  table.compare { display: block; overflow-x: auto; }

  .table-scroll::after {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    width: 2rem;
    height: 100%;
    pointer-events: none;
    background: linear-gradient(to right, rgba(250, 247, 242, 0), rgba(250, 247, 242, .95));
    border-radius: 0 10px 10px 0;
  }
}