/* ============================================================================
   onion/styles.css

   Used in a kitchen: one hand, wet fingers, a phone propped against the
   backsplash. So the steppers are big, the plan is readable at arm's length,
   and two of the site's rules carry most of the weight:

     ZERO LAYOUT SHIFT. The drawings redraw on every tap at a height that
     depends only on the onion's proportions, and the prediction lands in a
     slot with a fixed min-height — so a result arriving never moves the
     button under a thumb.

     COLOUR IS NEVER THE ONLY SIGNAL. Every chart has a legend or a title that
     names its one series, and a table of the same numbers.

   The glass tokens come from /site.css.
   ========================================================================== */

:root {
  --bg: #0e1116;
  --ink: #e8edf2;
  --muted: #93a1b0;
  --line: #2a323d;
  --gold: #f0c419;
  --accent: #4aa8ff;
  --shadow: 0 6px 24px rgba(0, 0, 0, .35);
  --mono: ui-monospace, "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;

  /* chart series: the validated dark-surface categorical steps, in order */
  --s1: #3987e5;
  --s2: #d95926;
  --s3: #199e70;
  --ctx: rgba(232, 237, 242, .20);

  /* the onion itself */
  --flesh: rgba(244, 228, 196, .10);
  --flesh-line: rgba(244, 228, 196, .30);
  --skin: rgba(244, 228, 196, .75);
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--g-bg, var(--bg));
  color: var(--ink);
  line-height: 1.5;
  padding-bottom: 40px;
}
h1, h2, h3, h4 { margin: 0 0 .4em; font-weight: 650; }
a { color: var(--accent); }
.muted { color: var(--muted); }
.small { font-size: .84rem; }
button { font: inherit; cursor: pointer; -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
code { font-family: var(--mono); font-size: .88em; }

/* ---------- top bar ---------- */
.topbar {
  text-align: center;
  padding: 22px 16px 14px;
  background: linear-gradient(180deg, rgba(11, 107, 58, .62), rgba(8, 74, 40, .38));
  border-bottom: 2px solid rgba(240, 196, 25, .45);
  box-shadow: var(--g-hi), var(--shadow);
  -webkit-backdrop-filter: var(--g-blur); backdrop-filter: var(--g-blur);
}
.brand { display: flex; gap: .5rem; align-items: center; justify-content: center; }
.brand h1 { font-size: 1.6rem; letter-spacing: .3px; margin: 0; }
.bulb { font-size: 1.5rem; }
.tagline { margin: 6px 0 0; color: #d8efe0; font-size: .9rem; }

/* ---------- layout ---------- */
main { max-width: 980px; margin: 16px auto; padding: 0 16px; display: flex; flex-direction: column; gap: 16px; }
.panel {
  background: var(--g-sheen), var(--g-base);
  border: 1px solid var(--g-line);
  border-radius: var(--g-r-lg, 16px);
  padding: 16px 18px;
  box-shadow: var(--g-hi), var(--g-lo), var(--shadow);
  -webkit-backdrop-filter: var(--g-blur); backdrop-filter: var(--g-blur);
}
.panel > h2 { font-size: 1.08rem; color: var(--gold); }
.placeholder { color: var(--muted); text-align: center; padding: 18px 8px; margin: 0; }

/* ---------- inputs ---------- */
.inputs { display: flex; flex-wrap: wrap; gap: 12px 18px; align-items: flex-end; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field label, .field .lbl { font-size: .8rem; color: var(--muted); font-weight: 600; }
.stepper {
  display: inline-flex; align-items: center;
  border: 1px solid var(--g-line); border-radius: 12px; background: var(--g-well); overflow: hidden;
}
.stepper button {
  width: 44px; height: 44px; border: none; background: var(--g-in-fill); color: var(--ink);
  font-size: 1.3rem; font-weight: 600; line-height: 1;
}
.stepper button:active { background: var(--g-in-fill-hover); }
.stepper input {
  width: 58px; height: 44px; border: none; background: transparent; color: var(--ink);
  font: 650 1.15rem var(--mono); text-align: center; -moz-appearance: textfield; appearance: textfield;
}
.stepper input::-webkit-outer-spin-button, .stepper input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }

.segmented { display: inline-flex; border: 1px solid var(--g-line); border-radius: 12px; overflow: hidden; background: var(--g-well); }
.segmented button {
  min-height: 44px; padding: 5px 13px; border: none; border-right: 1px solid var(--g-line);
  background: transparent; color: var(--muted); display: flex; flex-direction: column; align-items: center; justify-content: center;
  font-size: .86rem; font-weight: 650; line-height: 1.15;
}
.segmented button:last-child { border-right: none; }
.segmented button .sub { font-size: .7rem; font-weight: 500; opacity: .8; }
.segmented button.active { background: linear-gradient(180deg, #ffd955, var(--gold)); color: #241c02; }
.hint { margin: 10px 0 0; }

/* ---------- the drawings ---------- */
.views { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 14px; }
.view { margin: 0; min-width: 0; }
.view figcaption { font-size: .8rem; color: var(--muted); font-weight: 600; margin-bottom: 4px; }
.guide { width: 100%; }
.guide svg { display: block; margin: 0 auto; touch-action: manipulation; }
.cutinfo { min-height: 2.6em; margin: 4px 0 0; color: #c3cdd8; }

.g-board { fill: rgba(255, 255, 255, .025); }
.g-boardline { stroke: rgba(255, 255, 255, .35); stroke-width: 1.5; }
.g-flesh { fill: var(--flesh); stroke: none; }
.g-layer { fill: none; stroke: var(--flesh-line); stroke-width: 1; }
.g-skin { fill: none; stroke: var(--skin); stroke-width: 1.5; }
.g-cut { stroke: var(--gold); stroke-width: 1.6; stroke-linecap: round; fill: none; }
.g-cut.thin { stroke-width: 1.2; opacity: .9; }
.g-cut.on { stroke: #fff; stroke-width: 3; }
.g-hit { stroke: transparent; stroke-width: 18; cursor: pointer; }
.g-aimray { stroke: rgba(240, 196, 25, .28); stroke-width: 1; }
.g-aim { fill: var(--gold); stroke: var(--g-bg, #0a0d13); stroke-width: 2; }
.g-cross { stroke: rgba(232, 237, 242, .65); stroke-width: 1.2; }
.g-trimcut { stroke: rgba(232, 237, 242, .35); stroke-width: 1.2; }
.g-trim { fill: rgba(0, 0, 0, .35); }
.g-stub { fill: rgba(240, 196, 25, .12); }
.g-lbl { fill: #c3cdd8; font-size: 11.5px; font-weight: 600; }
.g-lbl.dim { fill: var(--muted); }
.g-lbl.gold { fill: var(--gold); }

/* ---------- the explode view ---------- */
/* Seven size bins, log-symmetric about the typical piece: warm for small
   (they scorch), cool for large, a neutral grey between. Brightness and
   saturation rise away from the middle, so the extremes are what you see. */
.pc-0 { --pc: #f07a6e; }
.pc-1 { --pc: #cf5b4c; }
.pc-2 { --pc: #9c6a5f; }
.pc-3 { --pc: #77746c; }
.pc-4 { --pc: #5f7fa6; }
.pc-5 { --pc: #3f82d6; }
.pc-6 { --pc: #74aef0; }
.xp-pc {
  fill: transparent; stroke: none; cursor: pointer;
  transform-origin: 0 0;
  transition: transform .45s cubic-bezier(.3, .7, .2, 1), fill .3s ease;
}
svg.exploded .xp-pc { fill: var(--pc); stroke: var(--g-bg, #0a0d13); stroke-width: .8; vector-effect: non-scaling-stroke; }
svg.exploded .xp-pc.on { stroke: #fff; stroke-width: 2; }
.g-plan { transition: opacity .3s ease; }
svg.exploded .g-plan { opacity: 0; pointer-events: none; }
.guide.stale .xp { opacity: .45; }
@media (prefers-reduced-motion: reduce) { .xp-pc, .g-plan { transition: none; } }

.xp-bar { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 8px; }
.xp-toggle {
  min-height: 40px; padding: 0 16px; border-radius: 999px; font-weight: 650; font-size: .88rem;
  color: var(--ink); background: var(--g-in-fill); border: 1px solid var(--g-line);
}
.xp-toggle[aria-pressed="true"] { background: linear-gradient(180deg, #ffd955, var(--gold)); color: #241c02; border-color: rgba(255, 230, 140, .7); }
.xp-slice { display: inline-flex; align-items: center; gap: 8px; font-size: .8rem; color: var(--muted); font-weight: 600; flex: 1 1 160px; }
.xp-slice input { flex: 1 1 auto; min-width: 90px; accent-color: var(--gold); }
.xp-slice input:disabled { opacity: .35; }
.xp-slice output { font: 600 .8rem var(--mono); min-width: 3.6em; text-align: right; color: #c3cdd8; }
/* the key keeps its line whether or not the view is exploded */
.xp-legend { display: flex; flex-direction: column; gap: 3px; margin-top: 8px; visibility: hidden; }
.xp-legend.shown { visibility: visible; }
.xp-swatches { display: flex; gap: 2px; }
.xp-sw { flex: 1 1 0; height: 18px; border-radius: 4px; background: var(--pc); display: flex; align-items: center; justify-content: center; }
.xp-sw span { font-size: .66rem; font-weight: 700; color: #0b0e13; white-space: nowrap; }
.xp-sw.pc-3 span, .xp-sw.pc-2 span, .xp-sw.pc-4 span { color: #eef2f6; }
.xp-cap { font-size: .72rem; color: var(--muted); }

/* ---------- the article's model, live ---------- */
.aw { margin-top: 12px; display: flex; flex-direction: column; gap: 10px; }
.aw-presets { display: flex; gap: 6px; flex-wrap: wrap; }
.aw-presets button {
  min-height: 36px; padding: 0 12px; border-radius: 999px; font-size: .8rem; font-weight: 650;
  color: #c3cdd8; background: var(--g-in-fill); border: 1px solid var(--g-line);
}
.aw-presets button.active { color: #241c02; background: linear-gradient(180deg, #ffd955, var(--gold)); border-color: rgba(255, 230, 140, .7); }
.aw-inputs { gap: 10px 14px; }
.aw-inputs .stepper button { width: 38px; height: 38px; }
.aw-inputs .stepper input { width: 40px; height: 38px; font-size: 1rem; }
.aw-inputs .segmented button { min-height: 38px; }
.aw-depth { flex: 1 1 220px; }
.aw-range { display: flex; align-items: center; gap: 10px; min-height: 38px; }
.aw-range input { flex: 1 1 auto; accent-color: var(--gold); }
.aw-range input:disabled { opacity: .35; }
.aw-range output { font: 650 .95rem var(--mono); min-width: 3.4em; text-align: right; }
.aw-fig { width: 100%; }
.aw-fig svg { display: block; margin: 0 auto; }
.aw-read { margin: 0; min-height: 3em; font-size: .9rem; color: #c3cdd8; }
.aw-read b { color: var(--ink); font-family: var(--mono); }

/* ---------- the colour toggle ---------- */
.xp-colour button { min-height: 40px; padding: 4px 12px; }

/* ---------- onion drawings (draw.js) ---------- */
.g-root { fill: rgba(120, 96, 60, .55); }
.g-slice { stroke: rgba(240, 196, 25, .7); stroke-width: 1.2; }
.g-lbl.strong { fill: var(--ink); }
.iso-host { margin-top: 6px; }
.iso-top { fill: rgba(244, 228, 196, .55); stroke: var(--g-bg, #0a0d13); stroke-width: 1; }
.iso-l { fill: rgba(244, 228, 196, .32); stroke: var(--g-bg, #0a0d13); stroke-width: 1; }
.iso-r { fill: rgba(244, 228, 196, .20); stroke: var(--g-bg, #0a0d13); stroke-width: 1; }
.shape-fig { margin-top: 10px; }
.shape-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 10px; }
.shape-trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 10px; }
.shape-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 10px; }
.shape-cell { margin: 0; min-width: 0; }
.shape-cell figcaption { font-size: .8rem; color: #c3cdd8; margin-bottom: 4px; }
.shape-cell svg { display: block; }
.shape-facts { margin: 4px 0 0; font-size: .76rem; color: var(--muted); line-height: 1.45; }
.ch-rowlbl.strong { fill: var(--gold); font-weight: 650; }
@media (max-width: 760px) {
  .shape-pair, .shape-trio { grid-template-columns: 1fr; }
  .shape-grid { grid-template-columns: 1fr 1fr; }
}

.steps { margin: 14px 0 0; padding-left: 1.4em; display: flex; flex-direction: column; gap: 8px; font-size: .97rem; }
.steps b { color: var(--gold); font-weight: 700; }
.more { margin-top: 14px; }
.more summary { cursor: pointer; color: var(--muted); font-weight: 650; font-size: .88rem; }
.more .inputs { margin-top: 10px; }

/* ---------- the prediction ---------- */
.predictor .inputs { margin-top: 6px; }
.go {
  margin-top: 14px; min-height: 46px; padding: 0 26px; border-radius: 999px; font-weight: 700; color: #04121f;
  background: linear-gradient(180deg, #7cc0ff, var(--accent)); border: 1px solid rgba(190, 224, 255, .6);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .45), 0 6px 16px rgba(74, 168, 255, .28);
}
.go:disabled { opacity: .55; cursor: progress; }
/* The table is drawn with dashes before the first run, so empty, working and
   full are the same shape; the min-height only covers font-loading jitter. */
.pred-slot { min-height: 262px; margin-top: 12px; transition: opacity .15s ease; }
.pred-slot.stale table, .pred-slot.stale .pred-note, .pred-slot.busy table { opacity: .45; }
.pred-status { min-height: 1.4em; margin: 6px 0 0; color: var(--gold); font-size: .86rem; }
.pred-table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.pred-table th, .pred-table td { padding: 6px 8px; border-bottom: 1px solid var(--g-in-line); text-align: right; vertical-align: top; }
.pred-table thead th { color: var(--muted); font-size: .78rem; font-weight: 650; }
.pred-table tbody th { text-align: left; font-weight: 650; }
.pred-table td { font: 650 1rem var(--mono); }
.pred-table .help { display: block; font-size: .72rem; font-weight: 400; color: var(--muted); }
/* three lines reserved: the note grows from the one-line prompt to the result */
.pred-note { margin: 10px 0 0; font-size: .88rem; color: #c3cdd8; min-height: 4.5em; }
@media (min-width: 761px) { .pred-note { min-height: 3em; } }
.pred-note b { color: var(--gold); }

/* ---------- tabs ---------- */
/* The tabs are the site's tier-2 .mode-tabs (site.css). A tab is a column of
   panels; [hidden] has to beat .findings' display:flex, so it is explicit. */
.tab { display: flex; flex-direction: column; gap: 16px; }
.tab[hidden] { display: none !important; }
.fgroup { display: flex; flex-direction: column; gap: 16px; }
.mode-tabs { max-width: 980px; }

/* ---------- findings ---------- */
.findings { display: flex; flex-direction: column; gap: 16px; }
.intro p { color: #c3cdd8; }
.finding h3 { font-size: 1.02rem; color: var(--ink); display: flex; gap: 8px; align-items: baseline; }
.fnum {
  flex: 0 0 auto; display: inline-flex; align-items: center; justify-content: center;
  width: 24px; height: 24px; border-radius: 50%; background: rgba(240, 196, 25, .14); color: var(--gold);
  font-size: .8rem; font-weight: 800;
}
.finding p { color: #c3cdd8; margin: .5em 0; }
.finding b { color: var(--ink); }
.caveats ul { margin: 6px 0 0; padding-left: 1.2em; color: #c3cdd8; font-size: .92rem; }
.caveats li { margin: 4px 0; }

.tiles { display: flex; gap: 12px; flex-wrap: wrap; margin: 10px 0; }
.tile { flex: 1 1 140px; padding: 12px 14px; border-radius: 12px; background: var(--g-in-fill); border: 1px solid var(--g-in-line); }
.tile-v { font-size: 1.9rem; font-weight: 650; line-height: 1.1; }
.tile-l { color: var(--muted); font-size: .82rem; }

/* ---------- charts ---------- */
.ch-cap { margin: 14px 0 2px !important; font-size: .82rem; font-weight: 650; color: var(--muted) !important; }
.chart { position: relative; }
.ch-box { position: relative; width: 100%; }
.ch-box svg { display: block; overflow: visible; }
.ch-box svg:focus { outline: none; }
.ch-box svg:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.ch-legend { display: flex; flex-wrap: wrap; gap: 4px 14px; margin: 4px 0 6px; font-size: .78rem; color: #c3cdd8; }
.ch-key { display: inline-flex; align-items: center; gap: 6px; }
.ch-key.dim { color: var(--muted); }
.ch-line { display: inline-block; width: 16px; height: 2px; border-radius: 1px; flex: 0 0 auto; }
.ch-grid { stroke: rgba(255, 255, 255, .07); stroke-width: 1; }
.ch-axis { stroke: rgba(255, 255, 255, .22); stroke-width: 1; }
.ch-tick { fill: var(--muted); font-size: 11px; font-variant-numeric: tabular-nums; }
.ch-axlbl { fill: var(--muted); font-size: 11px; }
.ch-rowlbl { fill: #c3cdd8; font-size: 11.5px; }
.ch-ctx { fill: none; stroke-linejoin: round; stroke-linecap: round; }
.ch-line-s { fill: none; stroke-linejoin: round; stroke-linecap: round; }
.ch-dot { stroke: var(--g-bg, #0a0d13); stroke-width: 2; }
.ch-ref { stroke: rgba(232, 237, 242, .45); stroke-width: 1; }
.ch-ref.strong { stroke: var(--gold); stroke-width: 1.5; }
.ch-reflbl { fill: #c3cdd8; font-size: 11px; font-weight: 600; }
.ch-band { fill: rgba(57, 135, 229, .10); }
.ch-bandlbl { fill: var(--muted); font-size: 10.5px; }
.ch-mklbl { fill: var(--ink); font-size: 11px; font-weight: 650; }
.ch-range { opacity: .85; }
.ch-hair { stroke: rgba(232, 237, 242, .4); stroke-width: 1; }
.ch-tip {
  position: absolute; pointer-events: none; z-index: 3; min-width: 150px; max-width: 250px;
  padding: 8px 10px; border-radius: 10px; font-size: .78rem;
  background: rgba(12, 15, 21, .94); border: 1px solid var(--g-line-strong); box-shadow: var(--g-drop);
}
.ch-tiphd { color: var(--muted); margin-bottom: 3px; }
.ch-tiprow { display: flex; align-items: center; gap: 6px; color: #c3cdd8; white-space: nowrap; }
.ch-tiprow b { color: var(--ink); font-variant-numeric: tabular-nums; }
.ch-table { margin-top: 8px; }
.ch-table summary { cursor: pointer; color: var(--muted); font-size: .8rem; font-weight: 650; }
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.ch-table table, table.data { border-collapse: collapse; margin-top: 6px; font-size: .82rem; min-width: 100%; }
.ch-table th, .ch-table td, table.data th, table.data td { padding: 5px 8px; border-bottom: 1px solid var(--g-in-line); text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
.ch-table th:first-child, table.data th:first-child { text-align: left; }
.ch-table thead th, table.data thead th { color: var(--muted); font-weight: 650; }
table.data tr.pick th, table.data tr.pick td { color: var(--gold); }

/* ---------- footer ---------- */
footer { max-width: 980px; margin: 20px auto 0; padding: 0 16px; font-size: .86rem; }
footer summary { cursor: pointer; color: var(--gold); font-weight: 650; }
.foot-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 12px; }
.foot-grid h4 { color: var(--gold); font-size: .9rem; }
.foot-grid p { margin: .5em 0; color: #c3cdd8; }

@media (max-width: 760px) {
  .views { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  main { padding: 0 10px; gap: 12px; }
  .panel { padding: 14px 13px; }
  .inputs { gap: 10px 12px; }
  .field.wide { width: 100%; }
  .field.wide .segmented { display: flex; }
  .field.wide .segmented button { flex: 1 1 0; padding: 5px 6px; }
  .stepper input { width: 50px; }
  .brand h1 { font-size: 1.4rem; }
}