:root {
  --bg: #16181d;
  --panel: #1e2128;
  --card: #262a33;
  --line: #343a46;
  --text: #e6e8ec;
  --muted: #8b93a3;
  --free: #2a2e37;
  --scroll-thumb: #3a404d;
  --scroll-thumb-hover: #565e6e;
  --err: #ff4d4d;
  --warn: #ffb84d;
  --ok: #5fd38d;
  --mono: ui-monospace, Consolas, "Courier New", monospace;
  --pixel: "DotGothic16", var(--mono);  /* PC-98 style pixel font for grid addresses */
  --glow: 0 0 3px rgba(170, 210, 255, 0.55);
  --cell: 26px;  /* grid cells are square: width = height; 26px fits "$F0" at 16px */
}

* { box-sizing: border-box; }

/* Scrollbars: thin, dark track-less thumb that lightens on hover. Standard properties
   (Chrome/Edge 121+, Firefox) plus ::-webkit-scrollbar for older Chromium. */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--scroll-thumb) transparent;
}

*:hover { scrollbar-color: var(--scroll-thumb-hover) transparent; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track, ::-webkit-scrollbar-corner { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--scroll-thumb);
  border: 2px solid transparent;
  border-radius: 6px;
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover { background-color: var(--scroll-thumb-hover); }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 13px/1.4 system-ui, "Segoe UI", sans-serif;
}

.app {
  display: grid;
  grid-template-columns: 1fr max-content;
  height: 100vh;
}

/* ---------- VRAM grid ---------- */

.grid-pane {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-left: 1px solid var(--line);
}

.grid-toolbar {
  padding: 10px 16px 6px;
  border-bottom: 1px solid var(--line);
}

.grid-scroll {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-gutter: stable;  /* reserve the scrollbar's width so it never covers the grid */
  padding: 0 16px 16px;
}

.switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
  user-select: none;
}

.switch input {
  appearance: none;
  position: relative;
  width: 30px;
  height: 16px;
  margin: 0;
  border-radius: 8px;
  background: var(--line);
  cursor: pointer;
  transition: background 0.15s;
}

.switch input::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--text);
  transition: transform 0.15s;
}

.switch input:checked { background: #4dabf7; }
.switch input:checked::after { transform: translateX(14px); }
.switch input:focus-visible { outline: 2px solid #4dabf7; outline-offset: 2px; }

.vram-grid {
  display: grid;
  grid-template-columns: 52px repeat(16, var(--cell));
  width: max-content;
  gap: 1px;
  font: 10px var(--mono);
}

.col-head {
  position: sticky;
  top: 0;
  z-index: 3;
  background: var(--bg);
  color: var(--muted);
  font: 16px var(--pixel);
  text-shadow: var(--glow);
  text-align: center;
  padding: 10px 0 4px;
}

.row-head {
  color: var(--muted);
  font: 16px var(--pixel);
  text-shadow: var(--glow);
  text-align: right;
  padding-right: 6px;
  line-height: var(--cell-h, var(--cell));
}

.row-head.major { color: #fff; }
.major { margin-top: 4px; }

.cell {
  position: relative;
  height: var(--cell-h, var(--cell));
  background: var(--free);
  border-radius: 1px;
}

/* Condensed: same width as normal; --cell-h is set from JS so all 128 rows fit the pane height. */
.vram-grid.condensed .major { margin-top: 0; }
.vram-grid.condensed .col-head { font-size: 12px; }  /* same as the condensed row addresses */
.vram-grid.condensed .cell { border-radius: 0; }
.vram-grid.condensed .cell.major { box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35); }
.vram-grid.condensed .row-head {
  height: var(--cell-h);
  line-height: 1;
  font-size: 12px;
  white-space: nowrap;
  overflow: visible;
}
.vram-grid.condensed .row-head:not(.major) { visibility: hidden; }

.cell.conflict { animation: blink 0.7s steps(1) infinite; }

@keyframes blink {
  50% { background: var(--err); }
}

/* Region picked with a target button: pulse. */
.cell.spot { animation: spot 0.8s ease-in-out 2; }

@keyframes spot {
  50% { filter: brightness(1.9); }
}

.cell.flash {
  z-index: 2;
  outline: 2px solid #fff;
  outline-offset: 1px;
}

/* ---------- Config panel ---------- */

/* Header stays put; the two body columns scroll on their own. */
.panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
  background: var(--panel);
}

.panel-head {
  flex: none;
  padding: 16px 20px 12px;
  border-bottom: 1px solid var(--line);
  container-type: inline-size;
}

.panel-body {
  flex: 1;
  min-height: 0;
  display: grid;
  /* Centre column: ~2x the budget table's natural width, never more than half the panel. */
  grid-template-columns: minmax(300px, 1fr) min(580px, 50%);
  gap: 24px;
  padding: 0 20px;
}

.config, .side {
  min-height: 0;
  overflow-y: auto;
  padding-right: 12px;   /* gap between the cards and the column's scrollbar */
  padding-bottom: 32px;
}

.config > h2:first-child, .side > h2:first-child { margin-top: 18px; }

.brand {
  display: flex;
  align-items: center;
  flex-wrap: wrap;   /* Antihero logo drops under the wordmark if the panel is too narrow */
  justify-content: space-between;
  gap: 12px 24px;
}

/* "SNES" by Westral Fonts (fontified SNES logo): installed copy, or ./fonts/SNES.ttf. */
@font-face {
  font-family: "SNES Logo";
  src: local("SNES"), local("SNES Regular"),
       url("fonts/SNES.ttf") format("truetype"),
       url("fonts/SNES.otf") format("opentype");
}

/* Friz Quadrata Bold: installed copy, or a font file dropped into ./fonts/. */
@font-face {
  font-family: "Antihero Friz";
  src: local("Friz Quadrata Bold"), local("FrizQuadrataBold"), local("Friz Quadrata Std Bold"),
       local("FrizQuadrataStd-Bold"), local("Friz Quadrata TT Bold"), local("FrizQuadrataTT-Bold"),
       url("fonts/FrizQuadrataBold.woff2") format("woff2"),
       url("fonts/FrizQuadrataBold.otf") format("opentype"),
       url("fonts/FrizQuadrataBold.ttf") format("truetype");
}

/* Antihero Software logo: ANTIHERO in the SNES logo font, outlined letters (sticker line art
   inverted for the dark panel), each letter overlapping and covering the previous one. */
.ah-logo {
  display: inline-flex;
  flex-direction: column;
  flex: none;
  font-family: "SNES Logo", "Archivo", "Arial Black", sans-serif;
  font-synthesis: none;
  font-style: italic;
  font-weight: 900;
  font-stretch: 125%;
  color: #fff;
}

.ah-word {
  display: flex;
  font-size: 40px;
  line-height: 1;
}

.ah-word span {
  display: inline-block;   /* painted per letter, so its fill hides the previous letter's outline */
  color: var(--panel);
  -webkit-text-stroke: 2px #fff;
}

.ah-word span + span { margin-left: -0.03em; }

.ah-tag {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-top: -3px;  /* tuck under ANTIHERO: ~half the line's natural gap */
  font-size: 11px;
  letter-spacing: 0.06em;
}

/* Three stacked colour lines (splash colours): yellow, orange, red. */
.ah-bar {
  flex: 1;
  height: 11px;
  background: linear-gradient(
    to bottom,
    #ffbe00 0 3px, transparent 3px 4px,
    #ff6f00 4px 7px, transparent 7px 8px,
    #ff2100 8px 11px
  );
}

.app-logo {
  margin: 0;
  white-space: nowrap;
  /* The SNES font already has the logo's slant and weight; font-synthesis: none stops the
     browser faking italic/bold on it, while the Archivo fallback still uses its real italic. */
  font-family: "SNES Logo", "Archivo", "Arial Black", sans-serif;
  font-synthesis: none;
  font-style: italic;
  font-weight: 900;
  font-stretch: 125%;
  text-transform: uppercase;
  color: #e4000f;
  /* The wordmark is ~12.4em wide: shrink it so it fits beside the Antihero logo (~300px with gap and italic overhang). */
  font-size: min(52px, (100cqi - 300px) / 12.5);
  line-height: 1;
  letter-spacing: -0.01em;
}


h2 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 20px 0 8px;
}

.usage { font: 12px var(--mono); color: var(--muted); }

.meter {
  height: 8px;
  margin-top: 8px;
  border-radius: 4px;
  background: var(--free);
  overflow: hidden;
}

.meter-fill {
  height: 100%;
  width: 0;
  border-radius: 4px;
  background: var(--ok);
  transition: width 0.2s, background 0.2s;
}

.meter-fill.high { background: var(--warn); }
.meter-fill.full { background: var(--err); }

.mode-row {
  display: flex;
  flex-wrap: wrap;   /* buttons drop under the dropdown when the column is narrow */
  align-items: center;
  gap: 8px;
}

.budget-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 20px; }
.budget-actions .github-link { margin-left: auto; }
.mode-row select { flex: 1; min-width: 240px; }

.hint { color: var(--muted); font-size: 11px; margin: 8px 0 0; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 8px;
}

.card.hidden { display: none; }
.card.off .sub, .card.off .info { opacity: 0.35; }
.card.collapsed .sub, .card.collapsed .info, .card.collapsed .card-head select { display: none; }
.card.collapsed .card-head { color: var(--muted); }

.card-head {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.card-head select { width: auto; }

.toggle { display: flex; align-items: center; gap: 6px; cursor: pointer; }

.sub {
  display: grid;
  grid-template-columns: 28px 40px repeat(3, minmax(0, 1fr));
  gap: 6px;
  align-items: end;
  margin-top: 8px;
}

.tag { color: var(--muted); font-size: 11px; padding-bottom: 5px; }

.fld { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.fld span { font-size: 10px; color: var(--muted); }
input[type="text"][readonly] {
  color: var(--muted);
  background: transparent;
  border-style: dashed;
  cursor: default;
}

/* INIT CODE: generated ca65 source. */
.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.code-head select { width: auto; }
.code-head .hint { margin: 0 auto 0 0; }

#init-code {
  display: block;
  width: 100%;
  /* Exactly 12 lines visible: 12 × line-height (1.45em) + 16px padding + 2px border
     + 10px for the horizontal scrollbar that long lines bring up + 1px against rounding. */
  height: calc(12 * 1.45em + 29px);
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #14161a;
  color: var(--text);
  font: 11.5px/1.45 var(--mono);
  white-space: pre;
  overflow: auto;
  resize: vertical;
  tab-size: 8;
}

#init-code:focus { outline: none; border-color: #4dabf7; }

/* (i) help buttons and their overlay (help.js). */
.help {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 13px;
  height: 13px;
  margin-left: 5px;
  padding: 0;
  border: 1px solid var(--muted);
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
  font: 700 9px/1 system-ui, "Segoe UI", sans-serif;
  text-transform: none;
  letter-spacing: 0;
  vertical-align: 1px;
  cursor: help;
}

.help:hover, .help:focus-visible { color: var(--text); border-color: var(--text); outline: none; }
.card.collapsed .help[data-help="bg.bpp"] { display: none; }

#help-pop {
  position: fixed;
  z-index: 50;
  max-width: 320px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #101216;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.55);
  color: var(--text);
  font: 12px/1.45 system-ui, "Segoe UI", sans-serif;
}

#help-pop h3 { margin: 0 0 4px; font-size: 12px; color: #fff; }
#help-pop ul { margin: 6px 0; padding-left: 18px; }
#help-pop li { margin: 2px 0; }
#help-pop b { color: #fff; }

/* Target buttons: scroll the grid to a region. */
.targets { margin-left: auto; display: flex; gap: 4px; }
.card.collapsed .targets { display: none; }

.target {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 6px;
  font: 11px system-ui, "Segoe UI", sans-serif;
  color: var(--muted);
  background: transparent;
}

.target:hover { color: var(--text); }
.target svg { width: 14px; height: 14px; fill: none; stroke: currentColor; stroke-width: 1.5; }
.target svg .dot { fill: currentColor; stroke: none; }

input[type="text"], select, button {
  background: #14161a;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 4px 6px;
  font: 12px var(--mono);
  width: 100%;
}

button { width: auto; cursor: pointer; font-family: inherit; }
button:hover { border-color: var(--muted); }

input[type="text"]:focus, select:focus { outline: none; border-color: #4dabf7; }
select:disabled { opacity: 1; color: var(--muted); cursor: default; appearance: none; text-align: center; }
input.bad { border-color: var(--err); }

input[type="color"] {
  width: 28px;
  height: 25px;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
}

.info {
  margin-top: 8px;
  font: 11px var(--mono);
  color: var(--muted);
  white-space: pre-line;
}

/* width 0 + min-width 100%: fill the column without making it wider (long messages wrap). */
.messages { list-style: none; padding: 0; margin: 0; width: 0; min-width: 100%; }

/* BUDGET recap table: its natural width sets the centre column's width. */
.budget { padding: 6px 12px; }
.budget table { width: 100%; border-collapse: collapse; font-size: 12px; white-space: nowrap; }
.budget th + th, .budget td + td { padding-left: 28px; }
.budget th {
  font-size: 10px;
  font-weight: 400;
  color: var(--muted);
  text-align: left;
  padding: 4px 0;
  border-bottom: 1px solid var(--line);
}
.budget td { padding: 4px 0; border-bottom: 1px solid #2e333e; }
.budget .b-num { text-align: right; font-family: var(--mono); white-space: nowrap; }
.budget .b-detail { text-align: right; color: var(--muted); font-family: var(--mono); }
.budget .swatch {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 8px;
  border-radius: 2px;
  vertical-align: -1px;
}
.budget .b-total td { border-bottom: none; padding-top: 6px; font-weight: 600; }

.messages li {
  padding: 6px 10px;
  margin-bottom: 4px;
  background: var(--card);
  border-left: 3px solid;
  border-radius: 0 4px 4px 0;
}

.messages li[data-addr] { cursor: pointer; }
.messages li[data-addr]:hover { background: #2e333e; }
.messages li.error { border-color: var(--err); }
.messages li.warn { border-color: var(--warn); }
.messages li.ok { border-color: var(--ok); }

/* Not enough room for two columns: usage + status go under the config, one scroll. */
@media (max-width: 1180px) {
  .panel-body { display: block; overflow-y: auto; }
  .config, .side { overflow: visible; }
  .config { padding-bottom: 0; }
  .side { max-width: 560px; }
}

@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; height: auto; }
  .panel, .panel-body { overflow: visible; }
  .grid-pane { order: -1; height: 70vh; border-left: none; border-bottom: 1px solid var(--line); }
  .grid-scroll { overflow-x: auto; }
}

/* Analytics consent banner (consent.js) */
.grid-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.link-button {
  background: none;
  border: 0;
  padding: 0;
  color: var(--muted);
  font-size: 12px;
  text-decoration: underline;
}
.link-button:hover { color: var(--text); }

#consent {
  position: fixed;
  left: 16px;
  bottom: 16px;
  z-index: 1000;
  max-width: 440px;
  padding: 14px 16px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.5);
  font-size: 13px;
  color: var(--text);
}
#consent[hidden] { display: none; }
#consent p { margin: 0 0 12px; line-height: 1.45; }
.consent-buttons { display: flex; justify-content: flex-end; gap: 8px; }
.consent-buttons .primary { background: #4dabf7; border-color: #4dabf7; color: #0b0d10; font-weight: 600; }
.consent-buttons .primary:hover { background: #74c0fc; border-color: #74c0fc; }
@media (max-width: 860px) { #consent { right: 16px; max-width: none; } }

/* GitHub repo link (next to the budget buttons) */
.github-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
  text-decoration: none;
}
.github-link:hover { color: var(--text); }
.github-link svg { width: 16px; height: 16px; fill: currentColor; }