/* =====================================================================
   The RID page: mathematical notation, the pipeline diagram and the
   live calculator. Loaded only by rid.html.
   ===================================================================== */

.rid-main{
  padding-top:calc(var(--banner-h) + 40px);
  padding-bottom:calc(var(--footer-h) + 70px);
  padding-left:24px;padding-right:24px;
  max-width:980px;margin:0 auto;
}

/* ── Hero ─────────────────────────────────────────────────────────── */
.rid-hero{text-align:center;margin-bottom:58px;}
.rid-eyebrow{
  font-size:11.5px;font-weight:700;letter-spacing:.28em;text-transform:uppercase;
  color:var(--accent-ink);margin-bottom:16px;
}
.rid-title{
  font-size:clamp(32px,5vw,52px);font-weight:800;color:var(--navy);
  line-height:1.12;letter-spacing:-.6px;margin-bottom:10px;
}
.rid-sub{font-size:17px;color:var(--muted);line-height:1.75;max-width:640px;margin:0 auto;}
.rid-tag{
  display:inline-block;margin-top:18px;padding:6px 16px;border-radius:999px;
  background:var(--panel);border:1px solid var(--border);
  font-family:'Inter',system-ui,sans-serif;font-size:12px;font-weight:700;
  letter-spacing:.08em;text-transform:uppercase;color:var(--accent-ink);
}

/* ── Section scaffolding ──────────────────────────────────────────── */
.rid-section{margin-bottom:56px;}
.rid-step{
  display:flex;align-items:center;gap:12px;margin-bottom:14px;
}
.rid-step-num{
  flex-shrink:0;width:30px;height:30px;border-radius:9px;
  background:var(--navy);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-family:'Inter',system-ui,sans-serif;font-size:13px;font-weight:800;
}
.rid-h2{font-size:clamp(22px,3vw,29px);font-weight:800;color:var(--navy);line-height:1.25;}
.rid-h3{font-size:16px;font-weight:800;color:var(--navy);margin:26px 0 10px;}
.rid-p{font-size:15.5px;color:var(--muted);line-height:1.8;margin-bottom:14px;}
.rid-p strong{color:var(--navy);font-weight:700;}
.rid-p code,.rid-inline{
  font-family:'Consolas','SF Mono',monospace;font-size:13.5px;
  background:var(--panel);border:1px solid var(--border);border-radius:5px;
  padding:1px 6px;color:var(--accent-ink);
}

/* ── Mathematics ──────────────────────────────────────────────────── */
.rid-math{
  background:linear-gradient(180deg,#fbfdff 0%,#f4f8fc 100%);
  border:1px solid var(--border);border-radius:16px;
  padding:34px 26px;margin:22px 0;text-align:center;overflow-x:auto;
  box-shadow:inset 0 1px 0 #fff;
}
.rid-math.dark{
  background:linear-gradient(180deg,#132a52 0%,#0f1f3d 100%);
  border-color:#1d3a63;box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.rid-eq{
  display:inline-flex;align-items:center;justify-content:center;gap:12px;
  font-family:'Cambria Math','Latin Modern Math',Cambria,Georgia,serif;
  font-size:clamp(20px,3.2vw,29px);color:var(--navy);white-space:nowrap;
}
.rid-math.dark .rid-eq{color:#eaf2fa;}
.rid-var{font-style:italic;}
.rid-op{color:var(--muted);font-style:normal;padding:0 2px;}
.rid-math.dark .rid-op{color:#9fb3cf;}
.rid-sub-i{font-size:.62em;vertical-align:sub;font-style:normal;letter-spacing:.02em;}
.rid-sup{font-size:.62em;vertical-align:super;font-style:normal;}

/* A proper stacked fraction */
.rid-frac{display:inline-flex;flex-direction:column;align-items:center;vertical-align:middle;margin:0 4px;}
.rid-frac-n{padding:0 10px 5px;}
.rid-frac-d{padding:5px 10px 0;border-top:1.6px solid var(--navy);}
.rid-math.dark .rid-frac-d{border-top-color:#8fb8d8;}

.rid-eq-note{
  font-family:'Inter',system-ui,sans-serif;font-size:12.5px;color:var(--muted);
  margin-top:18px;letter-spacing:.02em;
}
.rid-math.dark .rid-eq-note{color:#9fb3cf;}

/* Piecewise brace */
.rid-cases{
  display:inline-grid;grid-template-columns:auto auto;gap:8px 22px;
  text-align:left;font-family:'Cambria Math',Cambria,Georgia,serif;
  font-size:clamp(15px,2.2vw,19px);color:var(--navy);
  border-left:2.5px solid var(--navy);padding-left:18px;margin-top:6px;
}
.rid-cases .cond{font-family:'Inter',system-ui,sans-serif;font-size:12.5px;color:var(--muted);align-self:center;}

/* ── The three measurements ───────────────────────────────────────── */
.rid-grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:22px 0;}
.rid-card{
  background:#fff;border:1px solid var(--border);border-radius:14px;padding:22px 20px;
  transition:border-color .2s,transform .2s,box-shadow .2s;
}
.rid-card:hover{border-color:var(--accent);transform:translateY(-3px);box-shadow:0 16px 30px rgba(15,31,61,.08);}
.rid-sym{
  font-family:'Cambria Math',Cambria,Georgia,serif;font-size:34px;font-style:italic;
  color:var(--accent-ink);line-height:1;margin-bottom:10px;
}
.rid-card-name{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);margin-bottom:8px;}
.rid-card-body{font-size:14px;color:var(--muted);line-height:1.7;}
.rid-card-body b{color:var(--navy);}

/* ── Live calculator ──────────────────────────────────────────────── */
.rid-calc{
  background:#fff;border:1px solid var(--border);border-radius:18px;
  padding:26px;box-shadow:0 20px 40px rgba(15,31,61,.07);
}
.rid-calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;}
/* A grid item is min-width:auto by default, so the working table's own
   minimum would push both columns wider than the phone. */
.rid-calc-grid > *{min-width:0;}
.rid-calc .rid-table{min-width:0;}
.rid-field{margin-bottom:20px;}
.rid-field-top{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:8px;gap:10px;}
.rid-field-label{font-size:12.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);}
.rid-field-val{
  font-family:'Inter',system-ui,sans-serif;font-size:15px;font-weight:800;color:var(--navy);
  background:var(--panel);border-radius:6px;padding:2px 9px;min-width:66px;text-align:right;
}
.rid-range{
  width:100%;height:26px;background:transparent;cursor:pointer;
  appearance:none;-webkit-appearance:none;
}
.rid-range::-webkit-slider-runnable-track{height:6px;border-radius:3px;background:var(--border);}
.rid-range::-moz-range-track{height:6px;border-radius:3px;background:var(--border);}
.rid-range::-webkit-slider-thumb{
  appearance:none;-webkit-appearance:none;margin-top:-7px;
  width:20px;height:20px;border-radius:50%;background:var(--navy);border:3px solid #fff;
  box-shadow:0 2px 6px rgba(15,31,61,.3);
}
.rid-range::-moz-range-thumb{
  width:20px;height:20px;border-radius:50%;background:var(--navy);border:3px solid #fff;
  box-shadow:0 2px 6px rgba(15,31,61,.3);
}
.rid-readout{
  background:linear-gradient(180deg,#132a52,#0f1f3d);border-radius:14px;padding:22px;color:#fff;
}
.rid-readout-label{font-size:11px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:#9fb3cf;}
.rid-readout-value{
  font-family:'Inter',system-ui,sans-serif;font-size:52px;font-weight:800;line-height:1.05;margin:6px 0 2px;
}
.rid-readout-raw{
  font-family:'Consolas',monospace;font-size:12.5px;color:#9fb3cf;
  line-height:1.6;overflow-wrap:break-word;   /* break between terms, not mid-number */
}
.rid-verdict{
  display:inline-block;margin-top:14px;padding:6px 14px;border-radius:999px;
  font-family:'Inter',system-ui,sans-serif;font-size:12px;font-weight:800;
  letter-spacing:.08em;text-transform:uppercase;
}
.rid-verdict.open{background:rgba(47,158,110,.18);color:#7fe0b4;}
.rid-verdict.blocked{background:rgba(192,57,43,.2);color:#ff9d92;}

/* The 0-100 band. The track clips its own gradient corners, so the marker
   lives outside it, otherwise it disappears at 0 and at 100. */
.rid-band{margin-top:22px;}
.rid-band-wrap{position:relative;padding-top:9px;}
.rid-band-track{
  position:relative;height:38px;border-radius:10px;overflow:hidden;
  background:linear-gradient(90deg,#2f9e6e 0%,#8fb8d8 42%,#c77a0a 72%,#c0392b 100%);
}
.rid-band-mask{position:absolute;top:0;bottom:0;background:rgba(15,31,61,.72);}
.rid-band-marker{
  position:absolute;top:2px;bottom:-4px;width:3px;margin-left:-1.5px;
  background:var(--navy);border-radius:2px;
  box-shadow:0 0 0 1.5px #fff,0 2px 6px rgba(0,0,0,.3);
  transition:left .12s ease-out;
}
.rid-band-marker::before{
  content:'';position:absolute;left:50%;top:-6px;transform:translateX(-50%);
  border-left:5px solid transparent;border-right:5px solid transparent;
  border-top:7px solid var(--navy);
}
.rid-band-scale{
  display:flex;justify-content:space-between;margin-top:7px;
  font-family:'Inter',system-ui,sans-serif;font-size:11px;color:var(--muted);letter-spacing:.06em;
}

/* ── Pipeline / chain diagrams ────────────────────────────────────── */
.rid-figure{
  background:#fff;border:1px solid var(--border);border-radius:16px;
  padding:24px 20px;margin:22px 0;overflow-x:auto;
}
.rid-figure svg{display:block;margin:0 auto;max-width:100%;height:auto;}
.rid-caption{
  font-size:12.5px;color:var(--muted);text-align:center;margin-top:14px;line-height:1.6;
}

/* ── Chain of gates ───────────────────────────────────────────────── */
.rid-chain{display:flex;flex-direction:column;gap:8px;margin:22px 0;}
.rid-chain-row{
  display:flex;align-items:center;gap:14px;padding:13px 16px;
  background:#fff;border:1px solid var(--border);border-radius:11px;font-size:14.5px;color:var(--muted);
}
.rid-chain-row.here{border-color:var(--accent);background:var(--panel);color:var(--navy);font-weight:700;
  box-shadow:0 6px 16px rgba(15,31,61,.07);}
.rid-chain-i{
  flex-shrink:0;width:26px;height:26px;border-radius:7px;background:var(--panel);
  display:flex;align-items:center;justify-content:center;
  font-family:'Inter',system-ui,sans-serif;font-size:12px;font-weight:800;color:var(--muted);
}
.rid-chain-row.here .rid-chain-i{background:var(--navy);color:#fff;}

/* ── Tables ───────────────────────────────────────────────────────── */
.rid-table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:14px;background:#fff;}
.rid-table{width:100%;border-collapse:collapse;font-size:13.5px;min-width:520px;}
.rid-table th{
  text-align:left;padding:12px 16px;background:var(--navy);color:#fff;
  font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
}
.rid-table td{padding:12px 16px;border-bottom:1px solid var(--border);color:var(--muted);vertical-align:top;}
.rid-table tr:last-child td{border-bottom:none;}
.rid-table td:first-child{color:var(--navy);font-weight:700;}
.rid-table code{font-family:'Consolas',monospace;font-size:12.5px;color:var(--accent-ink);}
/* Figures in the live calculator read better in the sans-serif face. */
#ridTerms td:last-child{font-family:'Inter',system-ui,sans-serif;font-size:13px;color:var(--navy);}
#ridTerms td:last-child span{margin-left:10px;font-size:11.5px;letter-spacing:.04em;text-transform:uppercase;}

/* ── Notes ────────────────────────────────────────────────────────── */
.rid-note{
  border-left:3px solid var(--accent);background:var(--panel);
  border-radius:0 12px 12px 0;padding:16px 20px;margin:20px 0;
}
.rid-note-title{font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;
  color:var(--accent-ink);margin-bottom:6px;}
.rid-note p{font-size:14px;color:var(--muted);line-height:1.75;}
.rid-note.warn{border-left-color:var(--red);background:rgba(192,57,43,.05);}
.rid-note.warn .rid-note-title{color:var(--red);}

/* ── Mobile ───────────────────────────────────────────────────────── */
@media (max-width:820px){
  .rid-grid3{grid-template-columns:1fr;}
  .rid-calc-grid{grid-template-columns:1fr;gap:20px;}
}
@media (max-width:640px){
  .rid-main{padding-left:16px;padding-right:16px;padding-top:calc(var(--banner-h) + 28px);}
  .rid-math{padding:24px 14px;}
  .rid-readout-value{font-size:42px;}
  .rid-calc{padding:20px 16px;}
}