/* ==========================================================================
   NFELO brand tokens and materials: Bento Grid, light mode only.
   Source of truth: context/brand.md (Walker's brand brief, 2026-10-10). Every hex below is the brief's value and
   nothing else is added. styles.css builds the pages on top of this.

   Materials: tiles are radius 28 on the canvas board with 14px gaps, no borders and one soft shadow. Sub-tiles are radius 18,
   controls are pills. Exactly one solid primary tile (.b-primary, the "01" action tile) per view.
   Coverage: canvas 25-35%, ink 15-20%, primary 10-12%, secondary 10-15%, accent 3% or less.
   ========================================================================== */

/* ---- the brief's CSS variables ---- */
:root {
  --primary: #7db7eb;
  --secondary: #ffffff;
  --accent: #fbffa0;
  --neutral-dark: #1c2126;
  --neutral-light: #f5f7f9;
  --on-primary: #141414;
  --on-secondary: #141414;
  --on-accent: #141414;
  --font-heading: "Figtree", -apple-system, sans-serif;
  --font-body: "Nunito Sans", -apple-system, sans-serif;
  --heading-size: 52px;
  --body-size: 17px;
  --heading-weight: 700;
  --body-weight: 400;
  --heading-tracking: 2.5px;
  --radius: 12px;
  --radius-lg: 16px;
}

/* ---- derived tokens ---- */
:root {
  --canvas: #eaecee;
  --ink: #1c2126;
  --muted: #64686c;
  --line: #cbced0;
  --accent-ink: #a38400;
  --pri-tint: #dde6ee;
  --sec-tint: #edeff1;
  --ab-tile: #fbfbfc;
  --ab-tile-sec: #fcfcfd;
  --ab-tile-pri: #e9f1fa;
  --ab-sub: #f1f1f2;
  --ab-pri-hover: #8dc0ed;
  --ab-pri-press: #6796c1;
  --ab-on-pri-press: #141414;
}

/* ---- materials ---- */
:root {
  --ab-shadow: 0 1px 2px rgba(28,33,38,0.04), 0 14px 30px -18px rgba(28,33,38,0.22);
  --ab-shadow-hi: 0 2px 4px rgba(28,33,38,0.05), 0 22px 40px -16px rgba(28,33,38,0.3);
  --ab-tile-line: rgba(28,33,38,0.08);
  --ab-pri-glow: rgba(125,183,235,0.4);
  --r-tile: 28px;
  --r-sub: 18px;
  --gap: 14px;
  --ring: 0 0 0 3px var(--ab-pri-glow);
  color-scheme: light;
}

/* ---- focus: 3px primary with an outer 1px ink ring ---- */
:focus-visible { outline: 3px solid var(--primary); outline-offset: 0; box-shadow: 0 0 0 4px var(--ink); }

/* ---- tile and sub-tile ---- */
.tile-m { background: var(--ab-tile); color: var(--ink); border: 0; border-radius: var(--r-tile); box-shadow: var(--ab-shadow); }
.tile-m.is-lift { transition: transform 140ms ease, box-shadow 140ms ease; }
.tile-m.is-lift:hover { transform: translateY(-2px); box-shadow: var(--ab-shadow-hi); }
.tile-stage { background: var(--ab-tile-sec); }
.tile-lead { background: var(--sec-tint); }
.sub-tile { background: var(--ab-sub); border-radius: var(--r-sub); }

/* ---- the one primary action tile: label bottom-left (22px, 600), a 40px arrow circle top-right at on-primary 18% ---- */
.b-primary {
  position: relative; display: flex; flex-direction: column; justify-content: flex-end; min-height: 190px; padding: 22px;
  background: var(--primary); color: var(--on-primary); border: 0; border-radius: var(--r-tile); box-shadow: var(--ab-shadow);
  text-decoration: none; cursor: pointer; transition: transform 140ms ease, box-shadow 140ms ease, background-color 140ms ease;
}
.b-primary:hover { background: var(--ab-pri-hover); transform: translateY(-2px); box-shadow: var(--ab-shadow-hi); }
.b-primary:active { background: var(--ab-pri-press); color: var(--ab-on-pri-press); transform: none; }
.b-primary__n { position: absolute; left: 22px; top: 22px; font: 700 15px/40px var(--font-heading); letter-spacing: 0.04em; }
.b-primary__go { position: absolute; right: 22px; top: 22px; display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; background: rgba(20,20,20,0.18); font: 700 20px/1 var(--font-heading); }
.b-primary__label { font: 600 22px/1.2 var(--font-heading); letter-spacing: -0.01em; max-width: 12em; }
.b-primary[hidden] { display: none; }

/* ---- secondary button: transparent, ink text, secondary edge (ink edge for the contrast the secondary lacks) ---- */
.b-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 42px; padding: 0 18px; cursor: pointer; text-decoration: none;
  background: transparent; color: var(--ink); border: 2px solid var(--secondary); border-radius: 999px;
  font: 600 14px/1.2 var(--font-body);
  box-shadow: inset 0 0 0 1px var(--ink);
}
.b-btn:hover { background: var(--sec-tint); }
.b-btn:disabled { color: var(--muted); box-shadow: none; border-color: var(--line); cursor: not-allowed; }
/* an "on" state is the other place primary fills (a small control, not a tile) */
.b-btn[aria-pressed="true"] { background: var(--primary); color: var(--on-primary); border-color: var(--primary); }

/* ---- ghost link ---- */
.b-link { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }

/* ---- segmented control: a pill on a sub-tile; selected is a primary fill with on-primary text ---- */
.b-seg { display: flex; gap: 2px; padding: 4px; background: var(--ab-sub); border-radius: 999px; }
.b-seg button {
  flex: 1 1 0; min-width: 0; min-height: 38px; padding: 0 16px; margin: 0;
  background: transparent; color: var(--muted); border: 0; border-radius: 999px;
  font: 600 14px/1.2 var(--font-body); white-space: nowrap; cursor: pointer;
}
.b-seg button:hover:not([aria-pressed="true"]):not(:disabled) { background: var(--sec-tint); color: var(--ink); }
.b-seg button[aria-pressed="true"] { background: var(--primary); color: var(--on-primary); font-weight: 700; box-shadow: inset 0 0 0 1px var(--ink); }
.b-seg button.is-off, .b-seg button:disabled { color: var(--muted); background: transparent; cursor: not-allowed; text-decoration: line-through; text-decoration-thickness: 1px; opacity: 0.7; }

/* ---- field: canvas background, line edge; focus is a primary edge plus a 3px primary ring at 40% ---- */
.b-field {
  width: 100%; min-height: 48px; padding: 10px 18px;
  background: var(--canvas); color: var(--ink); caret-color: var(--ink);
  border: 1px solid var(--line); border-radius: 999px; font: 16px var(--font-body);
}
.b-field::placeholder { color: var(--muted); }
.b-field:focus, .b-field:focus-visible { outline: none; border-color: var(--primary); box-shadow: var(--ring); }

/* ---- toggle: on = primary track with an on-primary knob; off = line track with a muted knob ---- */
.b-switch {
  appearance: none; -webkit-appearance: none; position: relative; flex: none;
  width: 52px; height: 30px; margin: 0; cursor: pointer;
  background: var(--line); border: 0; border-radius: 999px; transition: background-color 140ms ease;
}
.b-switch::before { content: ''; position: absolute; left: 3px; top: 3px; width: 24px; height: 24px; border-radius: 50%; background: var(--muted); transition: transform 140ms ease; }
.b-switch:checked { background: var(--primary); box-shadow: inset 0 0 0 1px var(--ink); }
.b-switch:checked::before { background: var(--on-primary); transform: translateX(22px); }
.b-toggle { display: flex; align-items: center; gap: 12px; min-height: 44px; cursor: pointer; color: var(--ink); font: 600 14px/1.3 var(--font-body); }

/* ---- tag (secondary fill, on-secondary text) ---- */
.b-chip, .b-tag {
  display: inline-block; flex: none; padding: 4px 12px; white-space: nowrap;
  background: var(--secondary); color: var(--on-secondary); border: 0; border-radius: 999px; box-shadow: inset 0 0 0 1px var(--line);
  font: 700 12px/1.2 var(--font-body); letter-spacing: 0.02em;
}

/* ---- highlight word, once per view (Walker override 2026-10-10): the accent #fbffa0 with an ink outline ----
   One-line switch to blue: change --hl-fill to var(--primary). */
:root {
  --hl-fill: var(--accent);
  /* --hl-fill: var(--primary); */
  --hl-stroke: var(--ink);
}
.hl { color: var(--hl-fill); -webkit-text-stroke: 0.07em var(--hl-stroke); paint-order: stroke fill; }
@supports not ((-webkit-text-stroke: 1px black) or (text-stroke: 1px black)) {
  .hl { color: var(--ink); background: var(--hl-fill); border-radius: 8px; padding: 0 .08em; }
}

/* ---- data bar: line track, secondary fill with an ink edge so it reads (secondary is 1.1:1 on the line) ---- */
.b-bar { background: var(--line); height: 14px; border-radius: 999px; overflow: hidden; }
.b-bar > i { display: block; height: 100%; background: var(--secondary); box-shadow: inset 0 0 0 1.5px var(--ink); border-radius: 999px; }

/* ---- slider: line track, primary fill, round thumb ---- */
.b-range { --r: 14px; --lo: 0; --hi: 1; position: relative; height: 44px; }
.b-range__track { position: absolute; left: 0; right: 0; top: 50%; height: 10px; transform: translateY(-50%); background: var(--line); border-radius: 999px; }
.b-range__fill {
  position: absolute; top: 50%; height: 10px; transform: translateY(-50%); background: var(--primary); border-radius: 999px; box-shadow: inset 0 0 0 1px var(--ink);
  left: calc(var(--r) + (100% - 2 * var(--r)) * var(--lo));
  right: calc(var(--r) + (100% - 2 * var(--r)) * (1 - var(--hi)));
}
.b-range input { position: absolute; inset: 0; width: 100%; height: 100%; margin: 0; appearance: none; -webkit-appearance: none; background: transparent; pointer-events: none; }
.b-range input::-webkit-slider-runnable-track { background: transparent; height: 100%; }
.b-range input::-moz-range-track { background: transparent; height: 100%; }
.b-range input::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none; pointer-events: auto; cursor: grab;
  width: 28px; height: 28px; margin-top: 8px; background: var(--ab-tile); border: 2px solid var(--ink); border-radius: 50%; box-shadow: var(--ab-shadow);
}
.b-range input::-moz-range-thumb {
  pointer-events: auto; cursor: grab; box-sizing: border-box;
  width: 28px; height: 28px; background: var(--ab-tile); border: 2px solid var(--ink); border-radius: 50%; box-shadow: var(--ab-shadow);
}
.b-range input:active::-webkit-slider-thumb { background: var(--primary); cursor: grabbing; }
.b-range input:focus-visible { outline: none; box-shadow: none; }
.b-range input:focus-visible::-webkit-slider-thumb { outline: 3px solid var(--primary); outline-offset: 0; box-shadow: 0 0 0 4px var(--ink); }
.b-range input:focus-visible::-moz-range-thumb { outline: 3px solid var(--primary); outline-offset: 0; box-shadow: 0 0 0 4px var(--ink); }

/* ---- probability meter: line track, ink model knob, circle (Elo, primary) and triangle (Vegas, muted) ticks ---- */
.b-meter { --pad: 20px; position: relative; height: 34px; }
.b-meter__track { position: absolute; left: 0; right: 0; top: 50%; height: 22px; transform: translateY(-50%); background: var(--line); border-radius: 999px; }
.b-meter__track::after { content: ''; position: absolute; left: 50%; top: 4px; bottom: 4px; width: 2px; margin-left: -1px; background: var(--ab-tile); }
.b-meter__pos { position: absolute; top: 0; bottom: 0; width: 0; left: calc(var(--pad) + (100% - 2 * var(--pad)) * var(--at, 0.5)); }
.b-meter__pos[hidden] { display: none; }
.b-meter__tick { position: absolute; left: -2px; width: 4px; border-radius: 2px; background: var(--tick, var(--ink)); box-shadow: 0 0 0 1px var(--ink); }
.b-meter__tick--up { top: -28px; bottom: 50%; }
.b-meter__tick--down { top: 50%; bottom: -28px; }
.b-meter__knob { position: absolute; left: -16px; top: 50%; width: 32px; height: 32px; margin-top: -16px; background: var(--ink); border: 3px solid var(--ab-tile-sec); border-radius: 0; box-shadow: var(--ab-shadow); }
.b-meter.knob-elo .b-meter__knob { background: var(--primary); border-color: var(--ink); border-radius: 50%; }

/* ---- pattern materials. Text never sits on a pattern: it sits on a tile plate. ---- */
.pat-terrain { background: var(--canvas) url("assets/hero-terrain.png") center / cover no-repeat; }
/* a plate carries text over a pattern: a sub-level tile, so radius 18 */
.plate { background: var(--ab-tile); color: var(--ink); border-radius: var(--r-sub); box-shadow: var(--ab-shadow); }

@media (prefers-reduced-motion: reduce) {
  .b-primary, .tile-m.is-lift, .b-switch, .b-switch::before { transition: none; }
  .b-primary:hover, .tile-m.is-lift:hover { transform: none; }
}
@media (forced-colors: active) {
  .b-primary, .b-btn, .tile-m, .b-seg, .b-field, .b-switch, .b-chip, .b-tag, .b-meter__track, .b-range__track { border: 1px solid ButtonText; forced-color-adjust: auto; }
  .b-seg button[aria-pressed="true"] { background: Highlight; color: HighlightText; }
}