/* Howard — design tokens.
   Amber/cold pairing is the product's own axis: every answer sits between a hot
   limit and a cold limit, so the palette carries the same two poles. */
/* Palette and type sampled from harvey.ai: an off-white ground, near-black
   ink and buttons, a serif display face, and a pale slate band. The prior
   dark/amber scheme was a departure from the reference. */
:root{
  --ground:#FAFAF9;
  --panel:#F2F2F0;
  --panel-2:#EDEDEA;
  --band:#CDD8D9;
  --rule:#E2E2DE;
  --rule-bright:#CFCFC9;
  --body:#4A4845;
  --dim:#78756F;
  --ink:#0F0E0D;
  --accent:#0F0E0D;
  --hot:#8A5A2B;
  --cold:#33557F;
  --refuse:#9A4A28;

  --display:'Noto Serif','Iowan Old Style',Georgia,'Times New Roman',serif;
  --text:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --mono:'JetBrains Mono',ui-monospace,'SF Mono',Menlo,monospace;

  --pad:clamp(20px,5vw,64px);
  --maxw:1240px;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--ground);color:var(--body);
  font-family:var(--text);font-size:16px;line-height:1.62;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--ink);outline-offset:3px}

/* ---------- type scale ---------- */
h1,h2,h3,h4{font-family:var(--display);color:var(--ink);margin:0;font-weight:400;letter-spacing:-.022em;line-height:1.08}
h1{font-size:clamp(2.5rem,5.6vw,4.4rem);letter-spacing:-.028em}
h2{font-size:clamp(1.8rem,3.3vw,2.7rem);letter-spacing:-.022em}
h3{font-family:var(--text);font-size:1.02rem;font-weight:600;letter-spacing:-.005em;line-height:1.3}
h4{font-family:var(--text);font-size:.95rem;font-weight:600;letter-spacing:-.005em}
p{margin:0 0 1.05em}
strong{color:var(--ink);font-weight:600}

/* Units, conditions and every numeral live in mono. Physics is not body copy. */
.n,.u{font-family:var(--mono);font-variant-numeric:tabular-nums}
.u{color:var(--dim)}

.eyebrow{
  font-family:var(--mono);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--dim);margin:0 0 1.4rem;display:flex;align-items:center;gap:.7rem;
}
.eyebrow::before{content:'';width:22px;height:1px;background:var(--dim);flex:none}

.lede{font-size:clamp(1.06rem,1.5vw,1.28rem);line-height:1.55;color:var(--body);max-width:60ch}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}
section{padding:clamp(56px,8vw,110px) 0;border-top:1px solid var(--rule)}
section.flush{border-top:none}

/* ---------- header ---------- */
header{position:sticky;top:0;z-index:60;background:rgba(250,250,249,.88);backdrop-filter:blur(14px);border-bottom:1px solid var(--rule)}
.bar{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad);height:62px;display:flex;align-items:center;gap:2rem}
.logo{font-family:var(--display);font-weight:700;font-size:1.06rem;letter-spacing:-.03em;color:var(--ink);display:flex;align-items:center;gap:.55rem}
.logo::before{content:'';width:9px;height:9px;background:var(--ink);border-radius:1px;flex:none}
nav.main{display:flex;gap:1.6rem;margin-left:auto;font-size:.875rem}
nav.main a{color:var(--body);padding:.2rem 0;border-bottom:1px solid transparent}
nav.main a:hover{color:var(--ink)}
nav.main a[aria-current=page]{color:var(--ink);border-bottom-color:var(--ink)}
.bar .btn{margin-left:.4rem}
@media(max-width:820px){nav.main{display:none}.bar .btn{margin-left:auto}}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.5rem;font-family:var(--text);
  font-size:.875rem;font-weight:500;padding:.62rem 1.1rem;border-radius:2px;
  border:1px solid var(--rule-bright);color:var(--ink);background:transparent;
  transition:border-color .18s,background .18s,color .18s;cursor:pointer;
}
.btn:hover{border-color:var(--ink);background:transparent}
.btn.primary{background:var(--ink);border-color:var(--ink);color:#FAFAF9;font-weight:500}
.btn.primary:hover{background:#2B2926;border-color:#2B2926}
.cta-row{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:2rem}

/* ---------- signature: condition strip ---------- */
/* Carries the live problem condition. Present on every page so the reader is
   never reading a number without the condition it was computed at. */
.cond{
  border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);
  background:linear-gradient(90deg,rgba(51,85,127,.07),transparent 42%,rgba(138,90,43,.08));
  overflow:hidden;
}
.cond-in{
  max-width:var(--maxw);margin:0 auto;padding:.7rem var(--pad);
  display:flex;gap:1.5rem;flex-wrap:wrap;align-items:center;
  font-family:var(--mono);font-size:.735rem;letter-spacing:.04em;color:var(--dim);
}
.cond-in b{color:var(--body);font-weight:400}
.cond-in .lo{color:var(--cold)}
.cond-in .hi{color:var(--hot)}
.cond-in span{display:flex;gap:.5rem;align-items:baseline;white-space:nowrap}
.cond-note{margin-left:auto}
/* The trailing note is commentary, not condition data: it goes when the strip
   would otherwise wrap past the viewport edge. */
@media(max-width:960px){.cond-in span.cond-note{display:none}}

/* ---------- hero ---------- */
.hero{padding:clamp(64px,11vw,150px) 0 clamp(48px,7vw,86px)}
.hero h1{max-width:19ch}
.hero .lede{margin-top:1.7rem}
.hero .sub{margin-top:1.1rem;max-width:58ch;color:var(--dim);font-size:1rem}

/* ---------- generic grid ---------- */
.grid{display:grid;gap:1px;background:var(--rule);border:1px solid var(--rule);margin-top:2.6rem}
.grid.two{grid-template-columns:repeat(2,1fr)}
.grid.three{grid-template-columns:repeat(3,1fr)}
.grid.four{grid-template-columns:repeat(4,1fr)}
.cell{background:var(--ground);padding:clamp(20px,2.6vw,32px)}
.cell h3{margin-bottom:.6rem}
.cell p{font-size:.92rem;margin:0;color:var(--body)}
.cell p+p{margin-top:.7rem}
@media(max-width:900px){.grid.three,.grid.four{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.grid.two,.grid.three,.grid.four{grid-template-columns:1fr}}

/* ---------- the thread (real sequence, so it is numbered) ---------- */
.thread{margin-top:3rem;border-top:1px solid var(--rule)}
.step{
  display:grid;grid-template-columns:64px 1.1fr 1.4fr;gap:clamp(14px,2.4vw,34px);
  padding:clamp(22px,3vw,34px) 0;border-bottom:1px solid var(--rule);align-items:start;
}
.step .idx{font-family:var(--mono);font-size:.78rem;color:var(--dim);padding-top:.3rem;letter-spacing:.06em}
.step p{font-size:.94rem;margin:0}
.step .aside{font-family:var(--mono);font-size:.79rem;color:var(--dim);line-height:1.75}
.step .aside i{color:var(--body);font-style:normal}
@media(max-width:760px){.step{grid-template-columns:44px 1fr}.step .aside{grid-column:2}}

/* ---------- prompt / answer demo ---------- */
.demo{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--rule);border:1px solid var(--rule);margin-top:2.6rem}
@media(max-width:880px){.demo{grid-template-columns:1fr}}
.demo>div{background:var(--ground);padding:clamp(20px,2.6vw,30px)}
.demo h4{color:var(--dim);font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:1.1rem;font-weight:400}
.typed{font-family:var(--mono);font-size:.9rem;line-height:1.72;color:var(--ink)}
.typed em{color:var(--ink);font-style:normal}
.out{list-style:none;margin:0;padding:0;font-size:.92rem}
.out li{padding:.62rem 0;border-bottom:1px solid var(--rule);display:flex;gap:.7rem;align-items:baseline}
.out li:last-child{border-bottom:none}
.out .tag{font-family:var(--mono);font-size:.68rem;letter-spacing:.08em;color:var(--dim);flex:none;width:58px;text-transform:uppercase}

/* ---------- datasheet rows: the refuse state is a first-class result ---------- */
.sheet{margin-top:2.4rem;border:1px solid var(--rule)}
.row{display:grid;grid-template-columns:1.5fr auto auto;gap:1.2rem;align-items:baseline;padding:.85rem clamp(14px,2vw,22px);border-bottom:1px solid var(--rule)}
.row:last-child{border-bottom:none}
.row .label{font-size:.9rem;color:var(--body)}
.row .val{font-family:var(--mono);font-size:.95rem;color:var(--ink);text-align:right}
.row .val .unit{color:var(--dim);font-size:.82em;margin-left:.25em}
.row .src{font-family:var(--mono);font-size:.7rem;color:var(--dim);text-align:right;min-width:9ch}
.row.is-refused{background:rgba(154,74,40,.06)}
.row.is-refused .val{color:var(--refuse)}
.row.is-refused .label::after{content:' — data ends at −40 °C';color:var(--refuse);font-size:.8em}
@media(max-width:620px){.row{grid-template-columns:1fr auto}.row .src{display:none}}

/* ---------- split compare table ---------- */
.compare{margin-top:2.6rem;border:1px solid var(--rule);width:100%;border-collapse:collapse}
.compare th,.compare td{text-align:left;padding:.8rem clamp(12px,2vw,22px);border-bottom:1px solid var(--rule);font-size:.92rem;vertical-align:top}
.compare th{font-family:var(--mono);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--dim);font-weight:400}
.compare tr:last-child td{border-bottom:none}
.compare td:first-child{color:var(--ink)}
.compare td:last-child{color:var(--body)}

/* ---------- quiet band ---------- */
.band{background:var(--band);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.band .wrap{padding-top:clamp(48px,7vw,88px);padding-bottom:clamp(48px,7vw,88px)}

/* ---------- closing ---------- */
.close h2{max-width:24ch}
.close .lede{margin-top:1.4rem}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--rule);padding:clamp(40px,5vw,64px) 0 2.4rem;font-size:.86rem}
.fcols{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:2rem}
@media(max-width:760px){.fcols{grid-template-columns:1fr 1fr}}
footer h4{font-family:var(--mono);font-size:.7rem;letter-spacing:.13em;text-transform:uppercase;color:var(--dim);font-weight:400;margin-bottom:.9rem}
footer ul{list-style:none;margin:0;padding:0}
footer li{margin-bottom:.5rem}
footer a:hover{color:var(--ink)}
.legal{margin-top:clamp(32px,4vw,52px);padding-top:1.6rem;border-top:1px solid var(--rule);color:var(--dim);font-size:.79rem;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap}

/* ---------- load-in ----------
   No opacity-based entrance on content. A hero that needs JS-free CSS animation
   to become visible is blank whenever the animation is skipped, deferred, or
   captured mid-flight; the copy is the product, so it renders at rest. Motion
   here is confined to hover/focus affordances on controls. */
.rise{}


/* ---------- customer wall ---------- */
.wall{padding:clamp(30px,4vw,48px) 0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.wall p{text-align:center;font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--dim);margin:0 0 1.8rem}
.marks{display:flex;flex-wrap:wrap;justify-content:center;gap:clamp(1.6rem,5vw,3.4rem);align-items:center}
.marks span{font-family:var(--display);font-weight:600;font-size:clamp(.86rem,1.5vw,1.02rem);letter-spacing:-.01em;color:var(--dim)}

/* ---------- product cards (Harvey's platform grid) ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--rule);border:1px solid var(--rule);margin-top:2.6rem}
@media(max-width:900px){.cards{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.cards{grid-template-columns:1fr}}
.card{background:var(--ground);padding:clamp(22px,2.7vw,32px);display:flex;flex-direction:column;gap:.75rem;transition:background .18s}
.card:hover{background:var(--panel)}
.card .kicker{font-family:var(--mono);font-size:.68rem;letter-spacing:.13em;text-transform:uppercase;color:var(--dim)}
.card p{font-size:.9rem;margin:0;flex:1}
.card .more{font-size:.82rem;color:var(--dim);display:flex;align-items:center;gap:.35rem;margin-top:.5rem}
.card:hover .more{color:var(--ink)}

/* ---------- security detail rows ---------- */
.details{margin-top:2.4rem;border:1px solid var(--rule)}
.det{display:grid;grid-template-columns:1fr auto;gap:1rem;padding:1rem clamp(14px,2vw,22px);border-bottom:1px solid var(--rule);align-items:center}
.det:last-child{border-bottom:none}
.det h4{margin:0 0 .2rem}
.det p{margin:0;font-size:.86rem;color:var(--dim)}
.det .flag{font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;color:var(--cold);white-space:nowrap}

/* ---------- big closing CTA (Harvey's full-width final band) ---------- */
.final{border-top:1px solid var(--rule);background:var(--band)}
.final .wrap{padding:clamp(60px,9vw,120px) var(--pad);text-align:center}
.final h2{margin:0 auto;max-width:26ch;font-size:clamp(2rem,4.4vw,3.4rem)}
.final .lede{margin:1.4rem auto 0;text-align:center}
.final .cta-row{justify-content:center}

/* ---------- touch targets ----------
   Text links in dense lists render ~16px tall. Below ~44px a finger cannot hit
   them reliably, so on touch widths the padding grows while the visual rhythm
   stays put. Desktop keeps the tight list. */
@media(max-width:820px){
  footer li{margin-bottom:0}
  footer li a,.card .more,.det .flag{display:inline-flex;align-items:center;min-height:44px}
  nav.main a,.logo,.legal a{min-height:44px;display:inline-flex;align-items:center}
  .cond-in{font-size:.7rem;gap:1rem}
  .marks{gap:1.2rem 1.8rem}
  /* Tables reflow rather than force a horizontal scroll on a phone. */
  .compare,.compare tbody,.compare tr,.compare td{display:block;width:100%}
  .compare thead{display:none}
  .compare tr{border-bottom:1px solid var(--rule);padding:.5rem 0}
  .compare tr:last-child{border-bottom:none}
  .compare td{border-bottom:none;padding:.28rem clamp(12px,2vw,22px)}
  .compare td:first-child{color:var(--ink);font-weight:500}
  .compare td:last-child{color:var(--body)}
  .compare td:last-child::before{content:'\2192\00a0';color:var(--hot)}
}
/* Sheet rows: keep the number beside its label, let long labels wrap. */
@media(max-width:520px){
  .row{grid-template-columns:1fr auto;gap:.6rem}
  .row .label{font-size:.86rem}
  .det{grid-template-columns:1fr;gap:.5rem}
  .det .flag{min-height:44px}
}

/* ---------- ghost button ----------
   The secondary action in the top-right cluster. Log in is for people who
   already have access, so it must read as available without competing with
   Request access. */
.btn.ghost{border-color:transparent;color:var(--body);padding-left:.7rem;padding-right:.7rem}
.btn.ghost:hover{border-color:var(--rule-bright);color:var(--ink);background:transparent}
@media(max-width:520px){
  /* Both buttons plus the wordmark do not fit; the primary action wins. */
  .btn.ghost{display:none}
}

/* ---------- login ---------- */
.auth section{border-top:none;padding:0}
.auth{max-width:430px;margin:0 auto;padding:clamp(48px,9vw,104px) var(--pad) clamp(64px,10vw,120px)}
.auth h1{font-size:clamp(1.7rem,3.4vw,2.3rem);margin-bottom:.7rem}
.auth .sub{color:var(--dim);font-size:.94rem;margin-bottom:2.2rem}
.field{display:grid;gap:.45rem;margin-bottom:1.1rem}
.field label{font-family:var(--mono);font-size:.7rem;letter-spacing:.13em;text-transform:uppercase;color:var(--dim)}
.field input{
  background:#fff;border:1px solid var(--rule-bright);color:var(--ink);
  padding:.75rem .85rem;border-radius:2px;font:inherit;width:100%;
}
.field input:focus{border-color:var(--ink);outline:none}
.field input[inputmode=numeric]{font-family:var(--mono);font-size:1.3rem;letter-spacing:.34em;text-align:center}
.auth .btn{width:100%;justify-content:center}
.auth-note{margin-top:1.3rem;font-size:.82rem;color:var(--dim);line-height:1.6}
.auth-msg{
  margin-top:1.1rem;padding:.7rem .85rem;border:1px solid var(--rule-bright);
  border-radius:2px;font-size:.87rem;background:#fff;
}
.auth-msg.is-error{border-color:var(--refuse);color:var(--refuse)}
.auth-msg.is-ok{border-color:var(--cold);color:var(--cold)}
.auth-actions{display:flex;gap:.6rem;margin-top:.9rem}
.auth-actions .btn{font-size:.82rem;padding:.5rem .8rem}
[hidden]{display:none!important}

/* ============================================================
   HERO PACK — the signature.
   The page opens with Howard's actual artifact rather than a
   description of it. This audience reads datasheets all day and
   distrusts marketing prose, so the most persuasive thing on the
   page is a real calculation pack with a real refusal in it.
   ============================================================ */
.pack-hero{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);
  gap:clamp(28px,5vw,72px);align-items:start;
  padding:clamp(44px,7vw,92px) 0 clamp(40px,6vw,76px);
}
@media(max-width:940px){.pack-hero{grid-template-columns:1fr;gap:36px}}
.pack-hero h1{font-size:clamp(2.2rem,4.6vw,3.5rem);max-width:17ch}
.pack-hero .lede{margin-top:1.3rem;font-size:clamp(1rem,1.35vw,1.14rem)}

/* The pack itself: a document, not a card. Hairlines and mono, the
   way a real datasheet reads. */
.pack{border:1px solid var(--rule);background:var(--ground);font-family:var(--mono)}
.pack-head{
  display:flex;justify-content:space-between;align-items:baseline;gap:1rem;
  padding:.8rem clamp(12px,1.6vw,18px);border-bottom:1px solid var(--rule);
  font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);
}
.pack-head b{color:var(--body);font-weight:400;text-transform:none;letter-spacing:.04em}
.pack-q{
  padding:clamp(14px,1.8vw,20px);border-bottom:1px solid var(--rule);
  font-size:.83rem;line-height:1.75;color:var(--body);
}
.pack-q em{color:var(--ink);font-style:normal}
.pack-rows{padding:.3rem 0}
.pk{
  display:grid;grid-template-columns:1fr auto;gap:.5rem 1rem;
  padding:.6rem clamp(12px,1.6vw,18px);align-items:baseline;
}
.pk+.pk{border-top:1px solid var(--rule)}
.pk dt{font-family:var(--text);font-size:.85rem;color:var(--body);margin:0}
.pk dd{margin:0;font-size:.92rem;color:var(--ink);text-align:right;white-space:nowrap}
.pk dd s{color:var(--dim);font-size:.78em;text-decoration:none;margin-left:.3em}
.pk .src{grid-column:1/-1;font-size:.66rem;color:var(--dim);letter-spacing:.05em}

/* The refusal is the argument. It gets the weight, not an error style. */
.pk.refuse{background:rgba(154,74,40,.06);border-top:1px solid rgba(154,74,40,.28)}
.pk.refuse dd{color:var(--refuse)}
.pk.refuse .why{grid-column:1/-1;font-family:var(--text);font-size:.8rem;color:var(--refuse);line-height:1.55;margin-top:.15rem}

/* ---------- the thread, as prose rows rather than cards ---------- */
.flow{margin-top:2.4rem;border-top:1px solid var(--rule)}
.fl{display:grid;grid-template-columns:auto 1fr;gap:clamp(14px,2.4vw,30px);padding:clamp(18px,2.4vw,26px) 0;border-bottom:1px solid var(--rule)}
.fl dt{font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);padding-top:.28rem;min-width:8.5ch}
.fl dd{margin:0;padding:0}
.flow,.pack-rows{margin-block:0}
.fl dd p{margin-top:.3rem}
.fl h3{margin-bottom:.3rem}
.fl p{font-size:.93rem;margin:0}
@media(max-width:600px){.fl{grid-template-columns:1fr;gap:.5rem}}

/* ---------- Harvey-style hero: headline left, support + CTA right ---------- */
.hero-h{padding:clamp(52px,8vw,104px) 0 clamp(30px,4vw,52px);border-top:none}
.hero-split{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:clamp(28px,6vw,80px);align-items:start}
.hero-split h1{max-width:14ch}
.hero-aside{padding-top:.6rem}
.hero-aside p{font-size:1.02rem;line-height:1.6;color:var(--body);max-width:44ch;margin-bottom:1.5rem}
@media(max-width:880px){
  .hero-split{grid-template-columns:1fr;gap:24px}
  .hero-split h1{max-width:18ch}
}

/* The pack sits on the pale band below the fold, the way Harvey shows its
   product screenshot: the hero states the claim, the band shows the artifact. */
.showcase{background:var(--band);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);padding:clamp(34px,5vw,64px) 0}
.showcase .pack{max-width:920px;margin:0 auto;background:var(--ground);border-color:var(--rule)}