/* Terminal-adjacent, because the subject matter is bitmap type on a grid. */

:root {
  color-scheme: light dark;
  --bg: #f6f6f4;
  --panel: #ffffff;
  --ink: #14141a;
  --dim: #5c5c68;
  --line: #d8d8d2;
  --accent: #1d4ed8;
  --accent-ink: #ffffff;
  --warn: #9a3412;
  --ok: #15803d;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101014;
    --panel: #18181d;
    --ink: #ecece8;
    --dim: #9a9aa4;
    --line: #2c2c33;
    --accent: #7aa2ff;
    --accent-ink: #101014;
    --warn: #fca5a5;
    --ok: #86efac;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 1rem 4rem;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.55;
  -webkit-text-size-adjust: 100%;
}

main, .masthead, footer { max-width: 62rem; margin-inline: auto; }

.masthead { padding: 2.5rem 0 1.25rem; }
h1 {
  font-family: var(--mono);
  font-size: clamp(1.5rem, 4.5vw, 2.25rem);
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}
.lede { margin: 0; max-width: 44rem; color: var(--dim); }
.lede strong { color: var(--ink); }

h2 {
  font-family: var(--mono);
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  margin: 2.5rem 0 0.5rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--line);
}
h3 { font-size: 0.95rem; margin: 0 0 0.5rem; }

/* ---------------------------------------------------------------- controls */

.entry {
  display: flex;
  gap: 0.6rem;
  align-items: flex-end;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}
.entry .field { flex: 1 1 22rem; }

.field { display: flex; flex-direction: column; gap: 0.3rem; min-width: 0; }
.field > span {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dim);
}

input[type="text"], select {
  font: inherit;
  font-family: var(--mono);
  padding: 0.6rem 0.7rem;
  background: var(--panel);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 6px;
  min-width: 0;
  width: 100%;
}
input[type="text"]:focus-visible, select:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
input[type="color"] {
  width: 100%; height: 2.4rem; padding: 2px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 6px;
}
input[type="range"] { width: 100%; accent-color: var(--accent); }

button {
  font: inherit;
  font-family: var(--mono);
  padding: 0.6rem 1.1rem;
  border-radius: 6px;
  border: 1px solid transparent;
  background: var(--accent);
  color: var(--accent-ink);
  cursor: pointer;
}
button:disabled { opacity: 0.5; cursor: progress; }
button.ghost { background: transparent; color: var(--ink); border-color: var(--line); }

.options { margin-top: 1.25rem; }
.options summary {
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--dim);
  padding: 0.35rem 0;
}
.opts-grid {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  padding: 1rem 0 0.25rem;
}

.status {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--dim);
  min-height: 1.4em;
  margin: 1rem 0 0;
}
.status.error { color: var(--warn); }

/* ----------------------------------------------------------------- gallery */

.hint { color: var(--dim); font-size: 0.875rem; margin: 0 0 1rem; }

/* Fonts across, extent and inversion down. */
.gallery-scroll { overflow-x: auto; }
table.gallery {
  border-collapse: collapse;
  width: 100%;
  min-width: 30rem;
}
table.gallery th {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--dim);
  text-align: left;
  padding: 0.4rem 0.5rem;
  white-space: nowrap;
}
table.gallery thead th { text-align: center; border-bottom: 1px solid var(--line); }
table.gallery td {
  padding: 0.35rem;
  vertical-align: top;
  color: var(--dim);
  font-family: var(--mono);
  font-size: 0.72rem;
}

/* The check panel still uses a plain grid. */
.gallery.grid {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(auto-fill, minmax(12.5rem, 1fr));
}

@media (max-width: 34rem) {
  /* three columns of codes, no labels to make room for */
  table.gallery { min-width: 0; }
  table.gallery td { padding: 0.2rem; }
  table.gallery th { padding: 0.3rem 0.2rem; font-size: 0.62rem; }
  .card { padding: 0.4rem; }
  .card .meta { font-size: 0.6rem; }
}

.card {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 0.75rem;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
  text-align: left;
  color: inherit;
  transition: border-color 0.12s, transform 0.12s;
}
.card:hover { border-color: var(--accent); transform: translateY(-1px); }
.card[aria-pressed="true"] { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); }
.card canvas {
  width: 100%; height: auto; display: block;
  image-rendering: pixelated;
  border-radius: 4px;
  background: #fff;
}
.card .name { font-family: var(--mono); font-size: 0.8rem; }
.card .meta { font-family: var(--mono); font-size: 0.68rem; color: var(--dim); line-height: 1.4; }
.card.unfit { opacity: 0.45; cursor: not-allowed; }
.card .badge { color: var(--ok); }
.card .badge.imperfect { color: var(--warn); }

/* ------------------------------------------------------------------ detail */

.detail-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  align-items: start;
}
@media (max-width: 46rem) { .detail-grid { grid-template-columns: 1fr; } }

.preview { margin: 0; }
.preview canvas {
  width: 100%; height: auto; display: block;
  image-rendering: pixelated;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  cursor: crosshair;
}

/* Key for the editing preview. */
.key { display: block; margin-top: 0.5rem; line-height: 1.8; }
.key-row { display: block; }
.chip {
  display: inline-block;
  width: 0.7rem; height: 0.7rem;
  vertical-align: -0.05rem;
  border: 1px solid var(--line);
}
.chip + .chip { margin-left: -1px; margin-right: 0.25rem; }
.chip.fixed-dark { background: #000; }
.chip.fixed-light { background: #fff; }
.chip.free-dark { background: #6b6b6b; }
.chip.free-light { background: #d6d6d6; }
.preview figcaption {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--dim);
  margin-top: 0.5rem;
  overflow-wrap: anywhere;
}

.detail-side { display: flex; flex-direction: column; gap: 1rem; }
.stats { display: grid; grid-template-columns: auto 1fr; gap: 0.25rem 0.9rem; margin: 0; font-family: var(--mono); font-size: 0.75rem; }
.stats dt { color: var(--dim); }
.stats dd { margin: 0; overflow-wrap: anywhere; }
.nudge {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.25rem;
  max-width: 12rem;
}
.nudge button {
  padding: 0.4rem 0;
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
  font-size: 0.8rem;
  line-height: 1.2;
}
.nudge button:hover:not(:disabled) { border-color: var(--accent); }
.nudge-hint { font-size: 0.72rem; margin: 0.5rem 0 0; }

.swatches { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.downloads { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.warn { color: var(--warn); font-size: 0.8rem; margin: 0; }

/* ------------------------------------------------------------------- about */

.about p { max-width: 44rem; color: var(--dim); }
.about p em { color: var(--ink); font-style: normal; }
.about a { color: var(--accent); }

footer p {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--dim);
  border-top: 1px solid var(--line);
  padding-top: 1rem;
  margin-top: 3rem;
}