/* --- THE PAGE A STRANGER ARRIVES AT ---------------------------------------
     THE SAME TOKENS AS EVERY OTHER PAGE. A landing page with its own design
     language is a brochure for a different product; what changes here is the
     SPACING, because a reader with no context needs air and a reader with a
     book needs density. */
  .ab-wrap { max-width: 68rem; }
  .ab-nav { display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; }

  /* --- THE HERO -------------------------------------------------------------
     Words on the left, the mark on the right, on a faint drafting grid that
     fades out towards the edges -- the one page where the product introduces
     itself, so the one page that is allowed to be a little theatrical. The
     grid is two repeating hairline gradients under a radial mask; no image
     is fetched for it. */
  .ab-hero { position: relative; display: grid; align-items: center;
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .85fr);
    gap: 1.5rem 2.5rem; padding: 3.6rem 0 3rem;
    border-bottom: 1px solid var(--border); margin-bottom: 3rem; }
  .ab-hero::before {
    /* INSIDE THE COLUMN, NOT BLEEDING OUT OF IT: anything positioned past
       the window's edge gives a phone a sideways scroll. The mask fades the
       grid out before the edge, so the box it is clipped to never shows. */
    content: ""; position: absolute; inset: 0; z-index: -1;
    pointer-events: none;
    background:
      linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px) 0 0 / 56px 56px,
      linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px) 0 0 / 56px 56px;
    -webkit-mask-image: radial-gradient(60% 70% at 60% 40%, #000 20%, transparent 75%);
    mask-image: radial-gradient(60% 70% at 60% 40%, #000 20%, transparent 75%);
  }
  .ab-hero h1 { font-size: clamp(2.2rem, 5vw, 3.9rem); line-height: 1.02;
    letter-spacing: -.045em; font-weight: 800; margin: 0 0 1.3rem;
    max-width: 16ch;
    /* BRUSHED, NOT PRINTED: white at the top of the letters going to the
       platinum of the accent at their feet. The colour stays as the fallback
       for a browser that cannot clip a background to text. */
    color: var(--text);
    background: linear-gradient(180deg, #FFFFFF 20%, #B9C1CC 100%);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; }
  .ab-sub { font-size: var(--fs-lg); line-height: 1.6; color: var(--muted);
    max-width: 54ch; margin: 0 0 1.8rem; font-weight: 500; }
  .ab-cta { gap: .75rem; margin: 0 0 1.3rem; }
  .ab-primary, .ab-ghost {
    display: inline-flex; align-items: center; gap: .55rem; min-height: 50px;
    padding: .8rem 1.35rem; border-radius: var(--radius-sm);
    font-size: var(--fs-base); font-weight: 750; text-decoration: none;
    transition: transform var(--ease), box-shadow var(--ease),
                background var(--ease), border-color var(--ease);
  }
  .ab-primary { color: var(--on-accent); background: var(--btn);
    border: 1px solid rgba(255,255,255,.35); box-shadow: var(--btn-glow); }
  .ab-primary:hover { background: var(--btn-hover);
    box-shadow: var(--btn-glow-hover); transform: translateY(-1px); }
  .ab-primary .ico-right { opacity: .8; }
  .ab-primary:hover .ico-right { transform: translateX(2px); }
  .ab-ghost { color: var(--text); border: 1px solid var(--rule-strong);
    background: rgba(255,255,255,.025); box-shadow: var(--lift); }
  .ab-ghost:hover { background: rgba(255,255,255,.06);
    border-color: var(--muted); }
  .ab-trust { display: flex; flex-wrap: wrap; gap: .4rem 1.2rem; margin: 0;
    font-size: var(--fs-xs); color: var(--muted); font-weight: 550; }
  .ab-trust span { display: inline-flex; align-items: center; gap: .55rem; }
  .ab-trust span + span::before { content: ""; width: 4px; height: 4px;
    border-radius: 50%; background: var(--accent); opacity: .6; }

  .ab-hero-art { display: grid; place-items: center; }
  .ab-emblem { width: 100%; max-width: 25rem; height: auto; overflow: visible; }
  .ab-em-h0 { stop-color: #C4D4EC; stop-opacity: .13; }
  .ab-em-h1 { stop-color: #C4D4EC; stop-opacity: 0; }
  .ab-em-d0 { stop-color: #222830; }
  .ab-em-d1 { stop-color: #0E1114; }
  .ab-em-ring { fill: none; stroke: rgba(255,255,255,.10); stroke-width: 1; }
  .ab-em-ring-o { stroke-dasharray: 2 6; stroke: rgba(255,255,255,.13); }
  .ab-em-ring-i { stroke: rgba(226,232,240,.30); stroke-dasharray: 1 4; }
  .ab-em-disc { stroke: rgba(255,255,255,.08); stroke-width: 1; }
  .ab-em-ticks { stroke: var(--accent); stroke-width: 3; stroke-linecap: round; }
  .ab-em-arc { fill: none; stroke: var(--accent); stroke-width: 3;
    stroke-linecap: round; filter: drop-shadow(0 0 6px rgba(214,226,244,.55)); }
  .ab-em-v { filter: drop-shadow(0 4px 18px rgba(214,226,244,.35)); }

  /* THE ONE SENTENCE THAT IS THE WHOLE ARGUMENT, set apart and quiet. A
     service whose distinguishing feature is candour cannot shout it. */
  .ab-claim { grid-column: 1 / -1; font-size: var(--fs-sm2); line-height: 1.65;
    max-width: 78ch; margin: .6rem 0 0; padding: 1rem 1.15rem;
    background: var(--surface); border: 1px solid var(--border);
    border-left: 3px solid var(--accent); border-radius: var(--radius-sm);
    box-shadow: var(--shadow-1); }

  .ab-sec { margin: 0 0 3.4rem; scroll-margin-top: 5rem; }
  .ab-sec h2 { font-size: var(--fs-xl); letter-spacing: -.03em;
    font-weight: 800; margin: 0 0 .8rem; }
  .ab-sec-quiet { padding: 1.8rem; background: var(--surface);
    border: 1px solid var(--border); border-radius: var(--radius);
    box-shadow: var(--shadow-1); }
  .ab-lead { font-size: var(--fs-sm2); line-height: 1.65; color: var(--muted);
    max-width: 68ch; margin: 0 0 1.2rem; }

  .ab-steps { list-style: none; margin: 0; padding: 0; display: grid;
    gap: .1rem; }
  .ab-steps li { display: grid; grid-template-columns: 2rem 1fr; gap: .9rem;
    align-items: start; padding: .9rem 0;
    border-top: 1px solid var(--border); }
  .ab-n { width: 1.8rem; height: 1.8rem; border-radius: 999px;
    background: var(--btn); color: var(--on-accent); font-weight: 800;
    font-size: var(--fs-xs); line-height: 1.8rem; text-align: center;
    box-shadow: var(--btn-glow); }
  .ab-steps b { display: block; font-size: var(--fs-sm2); margin-bottom: .2rem; }
  .ab-steps p { margin: 0; font-size: var(--fs-sm); line-height: 1.6;
    color: var(--muted); max-width: 66ch; }

  .ab-bullets { list-style: none; margin: 0 0 1.2rem; padding: 0;
    display: grid; gap: .9rem; }
  .ab-bullets b { display: block; font-size: var(--fs-sm2); }
  .ab-bullets span { font-size: var(--fs-sm); line-height: 1.6;
    color: var(--muted); max-width: 66ch; display: block; }

  .ab-figs { display: grid; gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
    margin: 0 0 1rem; }
  .ab-fig { padding: 1.1rem 1.2rem; background: var(--surface);
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    box-shadow: var(--shadow-1); }
  .ab-fig span { display: block; font-size: var(--fs-2xs); color: var(--muted);
    text-transform: uppercase; letter-spacing: .06em; margin-bottom: .35rem; }
  .ab-fig b { font-size: var(--fs-xl); font-weight: 700;
    letter-spacing: -.02em; }
  .ab-note { font-size: var(--fs-xs); max-width: 66ch; }
  .ab-none { font-size: var(--fs-sm2); color: var(--muted); }

  /* --- HOW MUCH OF THE MARKET IS WATCHED -----------------------------------
     Four counts under the opening claim. `auto-fit` rather than a fixed four
     columns: at 380px these stack two and two instead of shrinking to a
     column of hairlines. */
  .ab-cov { grid-column: 1 / -1; display: grid; gap: 0; margin: .4rem 0 0;
    grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
    border: 1px solid var(--border); border-radius: var(--radius);
    overflow: hidden; background: var(--surface); box-shadow: var(--shadow-1); }
  .ab-cov-cell { padding: 1.15rem 1.3rem; display: flex;
    flex-direction: column-reverse; justify-content: flex-end; gap: .35rem;
    box-shadow: -1px 0 0 var(--border), 0 -1px 0 var(--border); }
  .ab-cov-cell b { display: block; font-size: 1.75rem; font-weight: 800;
    letter-spacing: -.04em; line-height: 1.1;
    /* TABULAR FIGURES so four counts of different widths line up rather than
       drifting against each other. */
    font-variant-numeric: tabular-nums; }
  .ab-cov-cell span { display: block; font-size: var(--fs-xs);
    color: var(--muted); font-weight: 650; }
  .ab-cov-cell span::first-letter { text-transform: uppercase; }

  /* --- WHAT A FIXED YIELD IS, DRAWN ----------------------------------------
     The diagram scales proportionally, so it is given a max width rather than
     the full column: stretched to 62rem the curve flattens into a line and
     stops showing the one thing it exists to show. */
  .ab-fig-wrap { margin: 0; }
  .ab-diagram { display: block; width: 100%; max-width: 40rem; height: auto;
    overflow: visible; }
  .abd-paid { stroke: var(--rule-strong); stroke-width: 1;
    stroke-dasharray: 2 5; }
  .abd-par { stroke: var(--accent-line); stroke-width: 1.5;
    stroke-dasharray: 5 4; }
  .abd-axis { stroke: var(--border); stroke-width: 1.5; }
  .abd-curve { fill: none; stroke: var(--pos); stroke-width: 2.5;
    stroke-linecap: round; }
  .abd-dot { fill: var(--bg); stroke: var(--pos); stroke-width: 2.5; }
  .abd-dot-end { fill: var(--pos); }
  .abd-gap { stroke: var(--muted); stroke-width: 1.2; }
  .abd-lab { fill: var(--muted); font-size: 13px;
    font-family: inherit; }
  .abd-gap-lab { fill: var(--text); font-size: 13px; font-weight: 600;
    font-family: inherit; }
  .ab-fig-wrap figcaption { font-size: var(--fs-xs); color: var(--muted);
    max-width: 62ch; margin-top: .9rem; line-height: 1.6; }

  /* --- THE REGISTER, TO SCALE ---------------------------------------------- */
  .ab-reg { margin: 0 0 1.6rem; }
  .abr-bar { display: flex; height: .55rem; border-radius: 999px;
    overflow: hidden; background: var(--bg2); gap: 2px; }
  .abr-seg { display: block; min-width: 3px; }
  /* Three states, three inks already in the palette. `unchecked` is warn and
     not neg: nobody has graded it, which is a gap and not a failure. */
  .abr-scored { background: var(--pos); }
  .abr-pending { background: var(--accent); }
  .abr-unchecked { background: var(--warn); }
  .abr-keys { list-style: none; display: flex; flex-wrap: wrap; gap: .3rem 1.2rem;
    margin: .8rem 0 0; padding: 0; font-size: var(--fs-xs);
    color: var(--muted); }
  .abr-keys li { display: flex; align-items: center; gap: .4rem; }
  .abr-keys b { color: var(--text); font-variant-numeric: tabular-nums; }
  .abr-key { width: .55rem; height: .55rem; border-radius: 2px;
    display: inline-block; flex: none; }

  .ab-link { display: inline-flex; align-items: center; gap: .35rem;
    color: var(--accent); text-decoration: none; font-weight: 600;
    font-size: var(--fs-sm2); }
  .ab-foot { margin-top: 3rem; padding-top: 1.2rem;
    border-top: 1px solid var(--border); font-size: var(--fs-xs);
    color: var(--muted); }
  @media (max-width: 860px) {
    .ab-hero { grid-template-columns: 1fr; padding-top: 2.2rem; }
    .ab-hero-art { order: -1; }
    .ab-emblem { max-width: 13rem; }
  }
  @media (max-width: 620px) {
    .ab-hero { padding-bottom: 2rem; }
    .ab-sec-quiet { padding: 1.1rem; }
    .ab-primary, .ab-ghost { flex: 1 1 100%; justify-content: center; }
  }