/* ==========================================================================
   aiRA — Component library and visual language.

   THE SIGNATURE
   Three motifs carry aiRA's identity, all derived from the product itself
   (a question, a reasoning trace, a move awaiting approval) and from the
   logo's four-point sparkle:

     1. .rule    a hairline whose left terminus is a sparkle. Sections are
                 separated by a mark, not a border. Asymmetric and directional,
                 so the page reads left to right, top to bottom.
     2. .thread  a vertical hairline with sparkle nodes. This is the reasoning
                 trace made visual: a sequence of steps, each one anchored.
     3. .qstring a real question set in mono, quoted, with a brand left mark.
                 Questions are the product's surface, so they are a first-class
                 typographic object rather than body copy.

   Nothing here uses the dashed double-rail system from the base export.
   That is another product's signature.
   ========================================================================== */

/* ---- 1. Sparkle rule --------------------------------------------------- */

.rule {
  position: relative;
  height: 1px;
  background: var(--border);
  border: 0;
  margin: 0;
}
.rule::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 9px;
  height: 9px;
  transform: translate(-1px, -50%);
  background: var(--brand);
  /* the sparkle, as a mask so it inherits the brand token */
  -webkit-mask: var(--sparkle-mask) center / contain no-repeat;
  mask: var(--sparkle-mask) center / contain no-repeat;
}
.rule--center::before { left: 50%; transform: translate(-50%, -50%); }
.rule--muted::before { background: var(--slate-300); }
.section--inv .rule { background: rgba(255, 255, 255, 0.12); }
.section--inv .rule::before { background: var(--indigo-400); }

:root {
  --sparkle-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%23000' d='M12,0Q14.6,9.4 24,12Q14.6,14.6 12,24Q9.4,14.6 0,12Q9.4,9.4 12,0Z'/%3E%3C/svg%3E");
}

/* Section top rule: sits flush on the section's leading edge. */
.section > .rule:first-child,
.section-rule {
  position: absolute;
  top: 0;
  left: var(--pad-x);
  right: var(--pad-x);
  width: auto;
}

/* ---- 2. Thread --------------------------------------------------------- */

.thread {
  display: grid;
  gap: var(--sp-8);
  position: relative;
  padding-left: var(--sp-8);
}
.thread::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(
    to bottom,
    var(--indigo-300) 0%,
    var(--border-strong) 58%,
    transparent 100%
  );
}
.thread__step { position: relative; }
.thread__step::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--sp-8) + 0px);
  top: 5px;
  width: 11px;
  height: 11px;
  background: var(--brand);
  -webkit-mask: var(--sparkle-mask) center / contain no-repeat;
  mask: var(--sparkle-mask) center / contain no-repeat;
}
.thread__step:not(:first-child)::before { background: var(--slate-400); }

.thread__label {
  font-family: var(--font-mono);
  font-size: var(--t-mono);
  font-weight: 500;
  letter-spacing: var(--tr-mono);
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 6px;
}
.thread__title {
  font-size: var(--t-title-sm);
  font-weight: 700;
  letter-spacing: var(--tr-title);
  color: var(--ink);
  margin-bottom: 5px;
}
.thread__body {
  font-size: var(--t-body-sm);
  line-height: 1.65;
  color: var(--ink-2);
  max-width: 32rem;
}

.section--inv .thread__title { color: var(--ink-inv); }
.section--inv .thread__body { color: var(--ink-inv-2); }
.section--inv .thread__label { color: var(--ink-inv-3); }
.section--inv .thread::before {
  background: linear-gradient(to bottom, rgba(139,157,249,0.5), rgba(255,255,255,0.10) 55%, transparent);
}
.section--inv .thread__step:not(:first-child)::before { background: rgba(255, 255, 255, 0.30); }

/* ---- 3. Question string ------------------------------------------------ */

.qstring {
  position: relative;
  padding-left: var(--sp-4);
  font-family: var(--font-mono);
  font-size: var(--t-mono-lg);
  font-weight: 400;
  line-height: 1.62;
  color: var(--ink);
  letter-spacing: -0.005em;
}
.qstring::before {
  content: '';
  position: absolute;
  left: 0;
  top: 3px;
  bottom: 3px;
  width: 2px;
  border-radius: 2px;
  background: var(--brand);
}
.qstring--muted { color: var(--ink-2); }
.qstring--muted::before { background: var(--slate-300); }
.section--inv .qstring { color: var(--ink-inv); }

/* ---- Mono micro-label -------------------------------------------------- */

.mono {
  font-family: var(--font-mono);
  font-size: var(--t-mono);
  font-weight: 500;
  letter-spacing: var(--tr-mono);
  text-transform: uppercase;
  color: var(--ink-3);
}
.mono--brand { color: var(--brand-ink); }
.mono--faint { color: var(--ink-faint); }
.mono--num { text-transform: none; letter-spacing: 0.02em; font-variant-numeric: tabular-nums; }
/* For labels that contain the product name: aiRA must never render AIRA. */
.mono--case { text-transform: none; }

/* ---- Cards -------------------------------------------------------------
   One card shell, three intents. Cards do not lift on hover; they settle.
   ---------------------------------------------------------------------- */

.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease),
              transform var(--dur-slow) var(--ease);
}
.card__title {
  font-size: var(--t-title);
  font-weight: 700;
  letter-spacing: var(--tr-title);
  color: var(--ink);
  margin-bottom: var(--sp-2);
  text-wrap: balance;
}
.card__body {
  font-size: var(--t-body-sm);
  line-height: 1.68;
  color: var(--ink-2);
  text-wrap: pretty;
}
.card__body strong { color: var(--ink); font-weight: 600; }
.card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  margin-bottom: var(--sp-4);
}

/* Interactive card: an anchor wrapping the shell. */
a.card, .card--link { display: block; }
a.card:hover, .card--link:hover {
  border-color: var(--brand-line);
  box-shadow: var(--shadow-md);
}

/* Numbered argument card. The index is a mono figure, not a circle badge. */
.card--argued { padding-top: var(--sp-5); }
.card__index {
  font-family: var(--font-mono);
  font-size: var(--t-mono);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--brand);
  margin-bottom: var(--sp-4);
  display: block;
}

/* Quiet card: no shadow, for dense grids. */
.card--quiet { box-shadow: none; background: var(--bg-subtle); }
.card--quiet:hover { box-shadow: none; }

/* Card on a dark section. */
.section--inv .card {
  background: rgba(255, 255, 255, 0.035);
  border-color: rgba(255, 255, 255, 0.10);
  box-shadow: none;
}
.section--inv .card__title { color: var(--ink-inv); }
.section--inv .card__body { color: var(--ink-inv-2); }
.section--inv .card__body strong { color: var(--ink-inv); }
.section--inv a.card:hover, .section--inv .card--link:hover {
  border-color: rgba(139, 157, 249, 0.45);
  background: rgba(255, 255, 255, 0.06);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
}
.card-grid--2 { grid-template-columns: repeat(2, 1fr); }
.card-grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 991px) {
  .card-grid, .card-grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .card-grid, .card-grid--2, .card-grid--4 { grid-template-columns: 1fr; }
}

/* ---- Chips and pills --------------------------------------------------- */

.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: var(--t-body-sm);
  font-weight: 550;
  color: var(--ink-2);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-pill);
  padding: 8px 15px;
  transition: border-color var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease),
              background var(--dur-fast) var(--ease);
}
.chip .sparkle { width: 10px; height: 10px; color: var(--brand); flex: none; }
button.chip, a.chip { cursor: pointer; }
button.chip:hover, a.chip:hover { border-color: var(--brand-line); color: var(--ink); }
.chip[aria-pressed="true"], .chip.is-active {
  background: var(--brand); border-color: transparent; color: var(--on-brand);
}
.chip[aria-pressed="true"] .sparkle, .chip.is-active .sparkle { color: var(--on-brand); }

.chip-row { display: flex; flex-wrap: wrap; gap: var(--sp-2); }

/* Eyebrow badge: the pill that sits above a hero headline. */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--t-mono);
  font-weight: 500;
  letter-spacing: var(--tr-mono);
  text-transform: uppercase;
  color: var(--brand-ink);
  background: var(--surface);
  border: 1px solid var(--brand-line);
  border-radius: var(--r-pill);
  padding: 7px 14px 7px 11px;
  box-shadow: var(--shadow-xs);
}
.badge .sparkle { width: 11px; height: 11px; flex: none; }

/* ---- Approval grammar --------------------------------------------------
   aiRA proposes, a person decides. Every proposed move carries its state.
   ---------------------------------------------------------------------- */

.state {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.075em;
  text-transform: uppercase;
  border-radius: var(--r-pill);
  padding: 4px 9px;
  white-space: nowrap;
}
.state::before {
  content: '';
  width: 5px; height: 5px; border-radius: 50%;
  background: currentColor;
  flex: none;
}
.state--pending { color: var(--pending); background: var(--pending-bg); }
.state--approve { color: var(--approve); background: var(--approve-bg); }
.state--hold    { color: var(--hold);    background: var(--hold-bg); }
.state--reject  { color: var(--reject);  background: var(--reject-bg); }

/* ---- Panel: CSS-drawn product surface ---------------------------------
   The house illustration style. Product UI is drawn in CSS, never
   screenshotted, so it stays crisp, themeable and editable.
   ---------------------------------------------------------------------- */

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}
.panel__bar {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 11px 14px;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border);
  position: relative;
}
/* Panel identity: the sparkle and the product's name, left-aligned.
   Not macOS traffic lights; this is aiRA's surface, not a browser mock. */
.panel__app {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--t-mono);
  font-weight: 600;
  letter-spacing: var(--tr-mono);
  /* no text-transform: the product name is always aiRA, never AIRA */
  color: var(--ink);
}
.panel__app .sparkle { width: 11px; height: 11px; color: var(--brand); flex: none; }
.panel__meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--t-mono);
  font-weight: 500;
  letter-spacing: var(--tr-mono);
  text-transform: uppercase;
  color: var(--ink-faint);
}
.panel__name {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: var(--t-mono);
  font-weight: 500;
  letter-spacing: var(--tr-mono);
  text-transform: uppercase;
  color: var(--ink-faint);
}
.panel__body { padding: var(--sp-5); }
.panel__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding: var(--sp-3) var(--sp-5);
  border-top: 1px solid var(--border);
  background: var(--bg-subtle);
}

/* Decision buttons: flat tinted pills, no border. */
.decide { display: flex; gap: 6px; }
.decide button {
  font-size: var(--t-caption);
  font-weight: 600;
  border-radius: var(--r-pill);
  padding: 6px 13px;
  transition: filter var(--dur-fast) var(--ease);
}
.decide button:hover { filter: brightness(0.96); }
.decide__approve { color: var(--approve); background: var(--approve-bg); }
.decide__hold    { color: var(--hold);    background: var(--hold-bg); }
.decide__reject  { color: var(--reject);  background: var(--reject-bg); }

/* ---- Dot field: a quiet stage behind illustrations --------------------- */

.dot-field { position: relative; }
.dot-field::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(circle, rgba(11, 16, 32, 0.09) 1px, transparent 1px);
  background-size: 18px 18px;
  -webkit-mask-image: radial-gradient(ellipse 78% 78% at 50% 42%, #000 28%, transparent 76%);
  mask-image: radial-gradient(ellipse 78% 78% at 50% 42%, #000 28%, transparent 76%);
}
.section--inv .dot-field::before {
  background-image: radial-gradient(circle, rgba(255, 255, 255, 0.10) 1px, transparent 1px);
}

/* ---- Comparison table -------------------------------------------------- */

.cmp-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.cmp {
  min-width: 44rem;
  font-size: var(--t-body-sm);
}
.cmp th, .cmp td {
  text-align: left;
  padding: var(--sp-4) var(--sp-5);
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.cmp thead th {
  font-family: var(--font-mono);
  font-size: var(--t-mono);
  font-weight: 500;
  letter-spacing: var(--tr-mono);
  text-transform: uppercase;
  color: var(--ink-faint);
  border-bottom-color: var(--border-strong);
  white-space: nowrap;
}
.cmp thead th.is-aira { color: var(--brand-ink); }
.cmp tbody th {
  font-weight: 600;
  color: var(--ink);
  width: 12rem;
}
.cmp td { color: var(--ink-2); line-height: 1.6; }
.cmp td.is-aira { color: var(--ink); background: var(--indigo-50); }
.cmp tbody tr:last-child th, .cmp tbody tr:last-child td { border-bottom: 0; }

/* ---- Stat ------------------------------------------------------------- */

.stat__n {
  /* Sans, not mono: Geist Mono gives the comma a full character cell,
     so "41,208" reads as "41 , 208". Tabular numerals keep it aligned. */
  font-family: var(--font-sans);
  font-size: 1.625rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}
.stat__l {
  font-size: var(--t-caption);
  color: var(--ink-3);
  margin-top: 5px;
}
.section--inv .stat__n { color: var(--ink-inv); }
.section--inv .stat__l { color: var(--ink-inv-2); }

/* ---- Logo wall --------------------------------------------------------- */

/* Until real logo files are approved, brand names are set as a mono
   index. Deliberate typography, not sans-serif text pretending to be
   logos. Swap for artwork when the files arrive. */
.logo-wall {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-4) var(--sp-10);
}
.logo-wall span {
  font-family: var(--font-mono);
  font-size: var(--t-mono-lg);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  white-space: nowrap;
}

/* ---- Question ledger ----------------------------------------------------
   Questions set as a numbered index, not a grid of cards. Each row is a
   figure, a capability, and the question itself as a .qstring. Reused on
   category pages for the per-role question sets.
   ---------------------------------------------------------------------- */

.qledger { border-top: 1px solid var(--border-strong); }

.qledger__row,
.qledger__more {
  display: grid;
  grid-template-columns: 2.75rem 13rem minmax(0, 1fr);
  gap: var(--sp-2) var(--sp-8);
  align-items: baseline;
  padding-block: var(--sp-5);
  border-bottom: 1px solid var(--border);
}

.qledger__n { color: var(--ink-faint); }
.qledger__cap { color: var(--brand-ink); }
.qledger .qstring { max-width: 46rem; }

.qledger__more-t {
  font-size: var(--t-body-sm);
  line-height: 1.68;
  color: var(--ink-2);
  max-width: 46rem;
  text-wrap: pretty;
}
.qledger__more-t strong { color: var(--ink); font-weight: 600; }
.qledger__go {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--brand-ink);
  white-space: nowrap;
  transition: gap var(--dur-fast) var(--ease);
}
.qledger__go svg { width: 14px; height: 14px; flex: none; }
a.qledger__more:hover .qledger__go { gap: 10px; }
a.qledger__more:hover .qledger__cap { color: var(--brand); }

@media (max-width: 768px) {
  .qledger__row,
  .qledger__more { grid-template-columns: 2.75rem minmax(0, 1fr); }
  .qledger__row .qstring,
  .qledger__more-t { grid-column: 2; }
}

/* ---- Footnote ---------------------------------------------------------- */

.footnote {
  font-size: var(--t-caption);
  line-height: 1.6;
  color: var(--ink-3);
  max-width: 44rem;
}
.footnote a { color: var(--brand-ink); text-decoration: underline; text-underline-offset: 2px; }

/* ---- Hover grammar: things settle into place --------------------------
   One idea, applied consistently. Elements at rest are slightly out of
   true and straighten on hover. Rest-state transforms MUST live in CSS,
   never in an inline style attribute, or the hover rule loses.
   ---------------------------------------------------------------------- */

.settle { transition: transform var(--dur-slow) var(--ease); }
.settle--tilt-l { transform: rotate(-1.4deg); }
.settle--tilt-r { transform: rotate(1.4deg); }
.settle--drop   { transform: translateY(4px); }
.settle-group:hover .settle,
.settle:hover { transform: none; }

@media (prefers-reduced-motion: reduce) {
  .settle, .card, .btn, .chip, .nav, .nav__panel { transition: none !important; }
  .settle--tilt-l, .settle--tilt-r, .settle--drop { transform: none; }
}

/* ---- Reveal on scroll -------------------------------------------------
   Implemented for real in js/reveal.js. If JS fails or is disabled the
   .no-js / no-observer path adds .is-in immediately, so content is never
   trapped invisible.
   ---------------------------------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
.reveal.is-in { opacity: 1; transform: none; }
.reveal-stagger > * { transition-delay: calc(var(--i, 0) * 60ms); }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}