/* ── THE ENGINE v12 — ONE mechanism per full-width row. The v11 two-up grid was cramped: two
     dense blocks sharing a line left neither enough room and gave the eye no single path down the
     section. Now a narrow number/glyph rail on the left forms a vertical index, the heading gets
     its own line, and the technical + plain columns sit underneath with roughly double the
     vertical air. Colours explicit (.rf-sec--lime only recolours h2/.idx, so inherited --ink
     ships WHITE on lime, the v3 bug). */
  #auth #rules{padding:0}
  #auth .eng12{--ei:#17172B;--em:rgba(23,23,43,.64)}
  #auth .eng12-head{max-width:var(--max);margin:0 auto;
    padding:clamp(56px,8vw,120px) var(--pad) clamp(48px,6vw,88px);
    display:grid;grid-template-columns:1.3fr 1fr;gap:clamp(30px,4.5vw,80px);align-items:stretch}
  #auth .eng12 h2,#auth .eng12 h3,#auth .eng12 p,#auth .eng12 span{color:var(--ei)}
  /* LEFT: one row per mechanism */
  #auth .eng12-list{list-style:none;margin:0;padding:0}
  #auth .eng12-row{display:grid;grid-template-columns:54px 1fr;gap:clamp(10px,1.4vw,18px);
    padding:clamp(30px,3.6vw,52px) 0;border-bottom:1px solid rgba(23,23,43,.2)}
  #auth .eng12-row:first-child{padding-top:0}
  #auth .eng12-row:last-child{border-bottom:0;padding-bottom:0}
  #auth .eng12-rail{display:flex;flex-direction:column;align-items:flex-start;gap:10px;padding-top:3px}
  #auth .eng12-n{font-size:11.5px;font-weight:800;letter-spacing:.05em;opacity:.4;
    font-variant-numeric:tabular-nums}
  #auth .eng12-gl{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.5;
    stroke-linecap:round;stroke-linejoin:round;opacity:.8}
  #auth .eng12-main h3{font-weight:900;font-size:clamp(21px,2.3vw,30px);letter-spacing:-.028em;
    margin:0 0 clamp(14px,1.6vw,20px);line-height:1.1}
  #auth .eng12-cols{display:grid;grid-template-columns:1fr 1fr;gap:clamp(18px,2.6vw,40px);
    align-items:start}
  #auth .eng12-t{font-size:14.5px;line-height:1.55;margin:0;color:var(--em)}
  #auth .eng12-p{margin:0;padding-left:14px;border-left:2px solid rgba(23,23,43,.24);
    font-size:15px;line-height:1.45;font-weight:650;letter-spacing:-.008em}
  /* animated sweep underline, 1:1 with the reference .uline */
  #auth .uline12{position:relative;display:inline-block;padding-bottom:4px}
  #auth .uline12::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;
    border-radius:2px;
    background:linear-gradient(90deg,#17172B,#3431A5,#6f6bff,#17172B,#3431A5,#6f6bff,#17172B);
    background-size:220% 100%;animation:uline12Sweep 2.6s linear infinite}
  @keyframes uline12Sweep{to{background-position:-220% 0}}
  @media(prefers-reduced-motion:reduce){#auth .uline12::after{animation:none}}
  /* RIGHT: display word high, research pinned low */
  #auth .eng12-big{text-align:right;display:flex;flex-direction:column;height:100%}
  #auth .eng12-num{display:block;font-size:12px;font-weight:800;letter-spacing:.05em;
    font-variant-numeric:tabular-nums;opacity:.5;margin-bottom:5px}
  #auth .eng12-big h2{font-weight:900;font-size:clamp(46px,8.4vw,138px);letter-spacing:-.042em;
    line-height:.82;margin:0}

  /* ── eng-orb: neural sphere + source coverage. Replaces a filler lead line that just restated
     the section. Pure CSS/SVG, no image and no library: layered conic + radial gradients counter
     rotating under a turbulence grain, with a soft pulsing rim. ────────────────────────────── */
  /* ⛔ was margin-left:auto inside a text-align:right column, which gave the figure, the stat
     rows and the headline three different left edges. The figure and its numbers are ONE unit
     and share an edge; the group sits left so the whole block lines up. */
  #auth .eng-orb-wrap{margin:clamp(22px,2.8vw,38px) 0 0;max-width:none;text-align:left;
    display:grid;grid-template-columns:auto minmax(0,1fr);gap:clamp(18px,2.4vw,34px);
    align-items:center}
  /* ── NEURAL FIELD (rebuilt 2026-08-02) ───────────────────────────────────────────────
     Replaces a 5-layer animated blob (core/swirl/swirl2/shimmer/grain + mix-blend-mode:overlay).
     ⛔ NO mix-blend-mode and NO filter:blur here. Both are banned on this page: blend modes are
     the construct that rendered a PDF white, and stacked blurs on animated parents are what froze
     app.keywordise.com on iPhones for days (docs/MOBILE_PERFORMANCE). Depth comes from static
     gradients; motion is transform/opacity ONLY, so nothing re-rasterises per frame.
     The figure DRAWS the claim next to it — nodes and edges resolving a match in embedding space —
     instead of being a decorative sphere. */
  /* ── PHASE RINGS (shipped 2026-08-02, direction B) ────────────────────────────────────
     Contours of a scalar field; one contour resolves lime and settles at the centre.
     Replaces an SVG node-graph that animated 18 elements = 18 compositing layers on a phone.
     ⛔ No filter:blur, no mix-blend-mode — the two constructs behind the iPhone freeze and the
     white-PDF incident. All depth is static gradient; all motion is inside one canvas. */
  /* ⛔ NO DISC. The navy sphere read as a sticker pasted onto the lime section. The contours now
     sit directly on the section ground, so the figure is line-work rather than an object.
     Removing the background means removing the RIM and DROP SHADOW too (they only describe a
     solid), and dropping overflow:hidden + border-radius (nothing left to clip, and the clip was
     what forced a circle). Stroke colours invert in the canvas: see the Phase Rings script. */
  #auth .eng-orb{position:relative;width:clamp(150px,15vw,205px);aspect-ratio:1;
    background:none;box-shadow:none;border-radius:0;overflow:visible}
  #auth .eng-orb-cv{position:absolute;inset:0;width:100%;height:100%;display:block}

  /* source coverage list */
  #auth .eng-src{list-style:none;margin:0;padding:0}
  /* ⛔ STACKED, not two columns. `auto 1fr` squeezed the label into whatever width the number
     left over, so "every source re-checked for dead links" broke across four ragged lines and
     hyphenated mid-word. The label is a caption for the number, so it belongs UNDER it. */
  #auth .eng-src li{display:grid;grid-template-columns:minmax(0,1fr);gap:2px;
    padding:11px 0;border-top:1px solid rgba(23,23,43,.18)}
  #auth .eng-src li:first-child{border-top:0;padding-top:0}
  /* ⛔ NO var(--ink) here: --ink is #FFFFFF at :root and only navy inside .app, so these read
     white-on-lime and were effectively invisible. State the colour. */
  #auth .eng-src b{font-size:clamp(16px,1.7vw,21px);font-weight:900;letter-spacing:-.025em;
    font-variant-numeric:tabular-nums;white-space:nowrap;color:#17172B}
  /* text-wrap:pretty avoids a single orphaned word on the last line now that the label has the
     full column width to itself. */
  #auth .eng-src span{font-size:12.5px;line-height:1.45;color:rgba(23,23,43,.62);
    text-wrap:pretty;max-width:34ch}
  @media(max-width:900px){
    #auth .eng-orb-wrap{margin-left:0;max-width:none;grid-template-columns:minmax(0,1fr);
      gap:clamp(14px,4vw,20px);justify-items:start}
    #auth .eng-orb{margin-right:auto;margin-left:0}
  }
  #auth .eng12-lead{margin:clamp(18px,2.2vw,30px) 0 0;margin-left:auto;max-width:30ch;
    text-align:left;font-size:clamp(14px,1.35vw,17px);line-height:1.45;font-weight:600}
  #auth .eng12-res{margin-top:auto;margin-left:auto;width:100%;max-width:360px;text-align:left;
    padding-top:clamp(34px,5vw,72px)}
  #auth .eng12-reshd{display:flex;align-items:center;gap:9px;margin-bottom:10px}
  #auth .eng12-eyebrow{font-size:11px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;
    opacity:.55}
  #auth .eng12-live{display:inline-flex;align-items:center;gap:6px;font-size:9.5px;font-weight:800;
    letter-spacing:.1em;text-transform:uppercase;padding:3px 8px;border-radius:100px;
    border:1px solid rgba(23,23,43,.3)}
  #auth .eng12-live i{width:6px;height:6px;border-radius:50%;background:var(--ei);
    animation:eng12pulse 1.9s ease-in-out infinite}
  @keyframes eng12pulse{0%,100%{opacity:1}50%{opacity:.25}}
  #auth .eng12-res p{font-size:14px;line-height:1.5;margin:0;color:var(--em)}
  #auth .eng12-stats{display:flex;gap:clamp(16px,2.2vw,30px);margin-top:16px;padding-top:14px;
    border-top:1px solid rgba(23,23,43,.18)}
  #auth .eng12-stat b{display:block;font-size:clamp(19px,2vw,26px);font-weight:900;line-height:1;
    letter-spacing:-.035em;color:var(--ei)}
  #auth .eng12-stat span{display:block;margin-top:4px;font-size:9.5px;font-weight:700;
    letter-spacing:.11em;text-transform:uppercase;opacity:.5}
  @media(max-width:900px){
    #auth .eng12-head{grid-template-columns:1fr;gap:36px}
    #auth .eng12-cols{grid-template-columns:1fr;gap:14px}
    #auth .eng12-row{grid-template-columns:40px 1fr}
    #auth .eng12-big{text-align:left}
    #auth .eng12-lead,#auth .eng12-res{margin-left:0;max-width:none}
  }