/* Scale Toolkit - shared styles. Light-first tokens, dark via prefers-color-scheme
   and an explicit data-theme override. Everything is written against tokens. */

:root {
  color-scheme: light;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --surface-2: #f0efec;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --muted: #898781;
  --hairline: #e1e0d9;
  --border: rgba(11, 11, 11, 0.10);
  --accent: #2a78d6;
  --accent-ink: #ffffff;
  --good: #006300;
  --warn-bg: #fff6e0;
  --warn-ink: #6b4a00;
  --warn-border: #fab219;
  --bad: #c62828;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  /* chart series (validated categorical order, light) */
  --s1: #2a78d6; --s2: #eb6834; --s3: #1baf7a; --s4: #eda100; --s5: #e87ba4;
  --track: #e1e0d9;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #0d0d0d;
    --surface: #1a1a19;
    --surface-2: #232322;
    --ink: #ffffff;
    --ink-2: #c3c2b7;
    --muted: #898781;
    --hairline: #2c2c2a;
    --border: rgba(255, 255, 255, 0.10);
    --accent: #3987e5;
    --good: #0ca30c;
    --warn-bg: #2a2410;
    --warn-ink: #fdd77a;
    --warn-border: #fab219;
    --bad: #ef5350;
    --s1: #3987e5; --s2: #d95926; --s3: #199e70; --s4: #c98500; --s5: #d55181;
    --track: #383835;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d;
  --surface: #1a1a19;
  --surface-2: #232322;
  --ink: #ffffff;
  --ink-2: #c3c2b7;
  --muted: #898781;
  --hairline: #2c2c2a;
  --border: rgba(255, 255, 255, 0.10);
  --accent: #3987e5;
  --good: #0ca30c;
  --warn-bg: #2a2410;
  --warn-ink: #fdd77a;
  --warn-border: #fab219;
  --bad: #ef5350;
  --s1: #3987e5; --s2: #d95926; --s3: #199e70; --s4: #c98500; --s5: #d55181;
  --track: #383835;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font: 15px/1.5 var(--sans);
  color: var(--ink);
  background: var(--page);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, kbd, pre { font-family: var(--mono); font-size: 0.92em; }
pre {
  margin: 0;
  padding: 12px 14px;
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: 6px;
  overflow-x: auto;
  line-height: 1.45;
}
h1, h2, h3 { line-height: 1.25; margin: 0 0 .4em; font-weight: 600; }
h1 { font-size: 1.6rem; letter-spacing: -0.01em; }
h2 { font-size: 1.15rem; }
h3 { font-size: 1rem; }
p { margin: 0 0 .8em; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }
.mono { font-family: var(--mono); }
.tnum { font-variant-numeric: tabular-nums; }

/* ---- site chrome -------------------------------------------------------- */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--hairline);
}
.site-header .inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  gap: 18px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  color: var(--ink); font-weight: 600; letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 26px; height: 26px; border-radius: 6px;
  background: var(--accent); color: var(--accent-ink);
  display: inline-grid; place-items: center;
  font: 700 13px/1 var(--mono);
}
.site-nav { display: flex; gap: 16px; margin-left: auto; font-size: .92rem; }
.site-nav a { color: var(--ink-2); }
.site-nav a[aria-current="page"] { color: var(--ink); font-weight: 600; }
.site-footer {
  max-width: 1280px; margin: 40px auto 24px; padding: 0 20px;
  color: var(--muted); font-size: .85rem;
  display: flex; flex-wrap: wrap; gap: 8px 20px;
}

main.page { max-width: 1280px; margin: 0 auto; padding: 24px 20px; }
.page-head { margin-bottom: 20px; }
.page-head p { color: var(--ink-2); max-width: 70ch; }

/* ---- cards / catalog ---------------------------------------------------- */
.card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  padding: 18px 20px;
}
.catalog {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}
.tool-card { display: flex; flex-direction: column; gap: 8px; min-height: 150px; }
.tool-card h2 { margin: 0; }
.tool-card p { color: var(--ink-2); flex: 1; margin: 0; }
.tool-card .meta { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; font-size: .8rem; color: var(--muted); }
.tag {
  display: inline-block; padding: 1px 8px; border-radius: 999px;
  border: 1px solid var(--hairline); background: var(--surface-2);
  font-size: .75rem; color: var(--ink-2);
}
.tag.ok { border-color: color-mix(in srgb, var(--good) 40%, transparent); color: var(--good); background: transparent; }
.tool-card a.cta { font-weight: 600; }
.tool-card.placeholder { border-style: dashed; color: var(--muted); }

/* ---- tool layout ------------------------------------------------------- */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 11fr) minmax(0, 9fr);
  gap: 24px;
  align-items: start;
}
@media (max-width: 960px) { .layout { grid-template-columns: 1fr; } }
.results { position: sticky; top: 16px; }
@media (max-width: 960px) { .results { position: static; } }

.privacy {
  display: flex; gap: 8px; align-items: flex-start;
  color: var(--ink-2); margin: 0;
}
.privacy .lock {
  flex: none; width: 14px; height: 14px; margin-top: 4px; border-radius: 3px;
  background: var(--good);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 7V5a4 4 0 0 1 8 0v2h1v8H3V7h1zm2 0h4V5a2 2 0 0 0-4 0v2z'/%3E%3C/svg%3E") center/contain no-repeat;
          mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 7V5a4 4 0 0 1 8 0v2h1v8H3V7h1zm2 0h4V5a2 2 0 0 0-4 0v2z'/%3E%3C/svg%3E") center/contain no-repeat;
}
.page-head .privacy { font-size: .9rem; }

/* the form is one surface; groups are separated by hairlines, not boxes */
.panel {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  padding: 0 20px;
}
.grp { padding: 20px 0 22px; border-bottom: 1px solid var(--hairline); }
.grp:last-of-type { border-bottom: 0; }
.grp-title { font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); font-weight: 700; margin: 0 0 14px; }
.grp-title .param { margin-left: 8px; text-transform: none; letter-spacing: 0; }
.grp-title .param::before { content: "→ "; }
.prefill h2 { font-size: 1rem; margin: 0; }
.prefill .status:empty { display: none; }
.prefill .status { margin: 8px 0 0; }
.prefill .privacy { margin-top: 10px; padding: 8px 10px; border-radius: 6px; background: color-mix(in srgb, var(--good) 7%, var(--surface)); }

.q { margin-top: 22px; }
.q:first-of-type { margin-top: 0; }
.qh { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 4px; }
.qh > label, .qh > h2 { font-weight: 600; color: var(--ink); font-size: 1rem; }
.param { font-family: var(--mono); font-size: .78rem; color: var(--muted); font-weight: 500; }
.qh .param::before { content: "→ "; }
.qh .param:not(code)::before { content: ""; }
.lead { color: var(--ink-2); margin: 0 0 10px; font-size: .92rem; }

details.help { margin: -2px 0 8px; font-size: .85rem; }
details.help summary { cursor: pointer; color: var(--accent); user-select: none; display: inline-block; }
details.help summary::marker, details.help summary::-webkit-details-marker { display: none; content: ""; }
details.help summary::before { content: "▸ "; color: var(--muted); font-size: .8em; }
details[open].help summary::before { content: "▾ "; }
details.help .body { margin-top: 6px; padding: 10px 12px; background: var(--surface-2); border-radius: 6px; color: var(--ink-2); }
details.help .body p:last-child { margin-bottom: 0; }

/* compact option rows */
.opts { display: grid; gap: 2px; margin: 4px 0 0; padding: 0; list-style: none; }
.opts.inline { display: flex; flex-wrap: wrap; gap: 2px 6px; }
.opt {
  display: grid; grid-template-columns: 16px 1fr auto; gap: 10px; align-items: baseline;
  padding: 6px 8px; border-radius: 6px; cursor: pointer; margin: 0 -8px;
}
.opts.inline .opt { margin: 0; }
.opt:hover { background: var(--surface-2); }
.opt:has(input:checked) { background: color-mix(in srgb, var(--accent) 10%, var(--surface)); }
.opt input { margin: 0; accent-color: var(--accent); align-self: start; margin-top: 4px; }
.opt .txt { min-width: 0; }
.opt .t { font-weight: 500; }
.opt .h { color: var(--ink-2); font-size: .85rem; }
.opt .h::before { content: "— "; color: var(--muted); }
.opt .v { color: var(--muted); font-family: var(--mono); font-size: .78rem; white-space: nowrap; justify-self: end; }

.row { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: flex-end; }
.row.stretch { align-items: stretch; }
.field { display: flex; flex-direction: column; gap: 3px; }
.field.grow { flex: 1 1 240px; }
.field.wide { width: 100%; margin-top: 8px; }
textarea.paste { min-height: 132px; white-space: pre; overflow: auto; }
.field label { font-size: .82rem; color: var(--ink-2); }
.unit { display: inline-flex; align-items: center; gap: 6px; }
input[type="number"], input[type="text"], select, textarea {
  font: inherit; color: var(--ink);
  background: var(--page); border: 1px solid var(--hairline); border-radius: 6px;
  padding: 5px 8px; min-width: 0;
}
input[type="number"] { width: 7.5em; font-variant-numeric: tabular-nums; }
input[type="text"].short, input[type="number"].short { width: 7.5em; }
input:focus-visible, select:focus-visible, textarea:focus-visible, .opt:has(input:focus-visible) {
  outline: 2px solid var(--accent); outline-offset: 1px;
}
textarea { width: 100%; font-family: var(--mono); font-size: .8rem; min-height: 96px; resize: vertical; }
.sub { margin-top: 10px; padding-left: 26px; }
.sub[hidden] { display: none; }
.suffix { color: var(--muted); font-size: .82rem; }

button, .btn {
  font: inherit; font-weight: 600; cursor: pointer;
  border: 1px solid var(--hairline); border-radius: 6px;
  background: var(--surface); color: var(--ink);
  padding: 6px 12px;
}
button:hover { border-color: var(--muted); }
button.primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
button.ghost { background: transparent; }
.btnrow { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; padding: 14px 0 16px; }

/* ---- results ------------------------------------------------------------ */
.results .card + .card { margin-top: 12px; }
.results h3 { font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 14px 0 6px; }
.kv { width: 100%; border-collapse: collapse; }
.kv th, .kv td { text-align: left; padding: 6px 4px; border-bottom: 1px solid var(--hairline); vertical-align: top; }
.kv thead th { color: var(--muted); font-weight: 500; font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; }
.kv td.num, .kv th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.kv tr:last-child td { border-bottom: 0; }
.kv tr.total td { font-weight: 600; border-top: 1px solid var(--muted); }
.kv .sw { display: inline-block; width: 10px; height: 10px; border-radius: 2px; vertical-align: -1px; margin-right: 8px; }
.kv td .explain { display: block; color: var(--muted); font-size: .8rem; }
.kv td .val { font-weight: 600; }
.kv td .def { display: block; color: var(--muted); font-size: .75rem; font-weight: 400; }
.kv .changed { color: var(--warn-ink); }

/* derivation */
ol.why { margin: 0; padding-left: 20px; font-size: .86rem; color: var(--ink-2); }
ol.why li { margin-bottom: 6px; }
ol.why strong { color: var(--ink); font-weight: 600; }

/* guard-rail checklist */
.checks { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; font-size: .85rem; }
.checks li { display: grid; grid-template-columns: 18px 1fr auto; gap: 8px; align-items: baseline; padding: 3px 0; color: var(--ink-2); }
.checks .i { font-weight: 700; text-align: center; font-family: var(--mono); }
.checks .ok .i { color: var(--good); }
.checks .soft .i { color: var(--muted); }
.checks .bad .i { color: var(--bad); }
.checks .bad .l { color: var(--bad); }
.checks .v { font-family: var(--mono); font-size: .78rem; color: var(--muted); white-space: nowrap; }

.hero { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 12px; }
@media (max-width: 520px) { .hero { grid-template-columns: 1fr; } }
.stat { padding: 10px 12px; border: 1px solid var(--hairline); border-radius: 8px; background: var(--surface-2); }
.stat .l { font-size: .8rem; color: var(--ink-2); }
.stat .v { font-size: 1.4rem; font-weight: 600; letter-spacing: -0.01em; font-variant-numeric: tabular-nums; }
.stat .c { font-size: .78rem; color: var(--muted); font-family: var(--mono); }

/* stacked memory bar */
.membar { margin: 8px 0 6px; }
.membar .track {
  display: flex; height: 22px; border-radius: 4px; overflow: hidden;
  background: var(--track); gap: 2px;
}
.membar .seg { height: 100%; min-width: 0; transition: width .2s ease; position: relative; }
.membar .seg[data-k="pagepool"] { background: var(--s1); }
.membar .seg[data-k="mftc"] { background: var(--s2); }
.membar .seg[data-k="msc"] { background: var(--s3); }
.membar .seg[data-k="kernel"] { background: var(--s4); }
.membar .seg[data-k="token"] { background: var(--s5); }
.membar .seg[data-k="reserve"] {
  background: repeating-linear-gradient(45deg, var(--muted) 0 2px, transparent 2px 6px);
  opacity: .6;
}
.membar .seg[data-k="over"] { background: var(--bad); }
.membar .axis { display: flex; justify-content: space-between; color: var(--muted); font-size: .75rem; font-variant-numeric: tabular-nums; margin-top: 4px; }
.tip {
  position: absolute; z-index: 5; pointer-events: none;
  background: var(--ink); color: var(--page); font-size: .78rem; padding: 4px 8px; border-radius: 4px;
  white-space: nowrap; transform: translate(-50%, -110%);
}
.tip[hidden] { display: none; }

.notice {
  border: 1px solid var(--warn-border); background: var(--warn-bg); color: var(--warn-ink);
  border-radius: 8px; padding: 8px 12px; margin: 0 0 8px; font-size: .9rem;
  display: grid; grid-template-columns: 18px 1fr; gap: 8px;
}
.notice .i { font-weight: 700; }
ul.notes { margin: 0; padding-left: 18px; color: var(--ink-2); font-size: .9rem; }
ul.notes li { margin-bottom: 4px; }

.cmds { position: relative; }
.cmds .copy { position: absolute; top: 8px; right: 8px; font-size: .78rem; padding: 3px 8px; }

.flash { color: var(--good); font-size: .85rem; }

/* sources */
.refs { margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--hairline); max-width: 90ch; }
.refs ol { padding-left: 20px; color: var(--ink-2); }
.refs li { margin-bottom: 4px; }
.refs details.help .body { background: transparent; padding: 0; }
.srconly { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }