/* ============================================================
   POST & BEAM — shared styles
   Palette: walnut ink, linen, aged brass, spruce
   Type: Zilla Slab (display) / Public Sans (body) / IBM Plex Mono (spec)
   ============================================================ */
:root{
  --ink:#241C15; --panel:#2E251C; --panel2:#3A2F23;
  --paper:#F1ECE2; --card:#FAF7F0; --line:#D8CFBF;
  --brass:#A97F3C; --brass-deep:#8A6528; --spruce:#4A5A48;
  --faint:#7A6F5F; --paper-ink:#F0EADE;
  --display:'Zilla Slab',Georgia,serif;
  --body:'Public Sans','Segoe UI',sans-serif;
  --mono:'IBM Plex Mono',Menlo,monospace;
  --maxw:1120px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{font-family:var(--body);background:var(--paper);color:var(--ink);line-height:1.6;font-size:16px}
img,svg{display:block;max-width:100%}
a{color:inherit}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* type */
h1,h2,h3{font-family:var(--display);line-height:1.15;font-weight:700}
h1{font-size:clamp(2.1rem,5vw,3.4rem)}
h2{font-size:clamp(1.6rem,3.5vw,2.2rem)}
h3{font-size:1.15rem;font-weight:600}
.kicker{font-family:var(--mono);font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--brass-deep)}
.lede{color:var(--faint);max-width:34em}
.mono{font-family:var(--mono)}

/* rules + section rhythm */
section{padding:72px 0}
.rule{display:flex;align-items:baseline;gap:14px;margin-bottom:18px}
.rule::after{content:"";flex:1;border-top:1px solid var(--line)}

/* header */
.hdr{position:sticky;top:0;z-index:50;background:rgba(241,236,226,.92);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.badge{width:40px;height:40px;border:2px solid var(--ink);border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:var(--display);font-weight:700;font-size:.8rem}
.brand b{font-family:var(--display);letter-spacing:.06em;font-size:1.05rem;display:block;line-height:1}
.brand small{font-family:var(--mono);font-size:.6rem;letter-spacing:.16em;color:var(--faint);text-transform:uppercase}
nav.main{display:flex;align-items:center;gap:26px}
nav.main a{font-size:.85rem;font-weight:600;text-decoration:none;color:var(--faint)}
nav.main a:hover,nav.main a.on{color:var(--ink)}
.btn{display:inline-block;font-family:var(--body);font-weight:700;font-size:.9rem;text-decoration:none;border:none;cursor:pointer;border-radius:6px;padding:13px 22px;transition:transform .12s ease}
.btn:active{transform:scale(.97)}
.btn-brass{background:var(--brass);color:#221A10}
.btn-brass:hover{background:var(--brass-deep);color:var(--paper-ink)}
.btn-ghost{border:1.5px solid var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:var(--paper-ink)}
.btn-lg{padding:16px 30px;font-size:1rem}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:6px;padding:8px 12px;font-family:var(--mono);font-size:.75rem;cursor:pointer;color:var(--ink)}

/* hero */
.hero{padding:88px 0 72px}
.hero .wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero .sub{margin:20px 0 30px;font-size:1.05rem}
.cta-row{display:flex;gap:14px;flex-wrap:wrap}
.trust{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:34px}
.trust span{font-family:var(--mono);font-size:.7rem;letter-spacing:.06em;color:var(--faint)}
.trust span::before{content:"— ";color:var(--brass)}

/* plan drawing frame */
.plan-frame{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:18px;box-shadow:0 18px 40px -24px rgba(36,28,21,.45)}
.plan-frame figcaption{font-family:var(--mono);font-size:.68rem;color:var(--faint);display:flex;justify-content:space-between;margin-top:12px}

/* photo placeholders */
.ph{position:relative;border-radius:8px;overflow:hidden;background:
  linear-gradient(135deg,#5C4632 0%,#7A5C3E 34%,#4A3826 60%,#6B5138 100%);min-height:230px;display:flex;align-items:flex-end}
.ph::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(92deg,rgba(0,0,0,.10) 0 3px,transparent 3px 14px);opacity:.5}
.ph figcaption{position:relative;width:100%;padding:12px 14px;font-family:var(--mono);font-size:.68rem;color:var(--paper-ink);background:linear-gradient(transparent,rgba(20,14,9,.75))}
.ph .tag{position:absolute;top:12px;left:12px;font-family:var(--mono);font-size:.62rem;letter-spacing:.1em;color:rgba(240,234,222,.8);border:1px solid rgba(240,234,222,.4);padding:3px 8px;border-radius:99px}

/* contrast section (napkin vs P&B) */
.dark{background:var(--panel);color:var(--paper-ink)}
.dark .kicker{color:var(--brass)}
.dark .lede{color:rgba(240,234,222,.65)}
.compare{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin-top:38px}
.comp-col{border:1px solid rgba(255,255,255,.12);border-radius:8px;padding:26px}
.comp-col.win{background:var(--panel2);border-color:var(--brass)}
.comp-col h3{margin-bottom:14px}
.comp-col ul{list-style:none}
.comp-col li{padding:9px 0;border-bottom:1px solid rgba(255,255,255,.08);font-size:.92rem;display:flex;gap:10px}
.comp-col li::before{content:"×";font-family:var(--mono);color:rgba(240,234,222,.4)}
.comp-col.win li::before{content:"✓";color:var(--brass)}

/* pillars */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:38px}
.pillar{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:26px}
.pillar .mono{color:var(--brass-deep);font-size:.72rem;letter-spacing:.14em}
.pillar h3{margin:10px 0 8px}
.pillar p{font-size:.92rem;color:var(--faint)}

/* process steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:38px;counter-reset:step}
.step{border-top:2px solid var(--ink);padding-top:16px}
.step::before{counter-increment:step;content:"STEP 0" counter(step);font-family:var(--mono);font-size:.68rem;letter-spacing:.16em;color:var(--brass-deep)}
.step h3{margin:8px 0 6px}
.step p{font-size:.9rem;color:var(--faint)}

/* projects grid */
.projects{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:38px}
.pair{display:grid;grid-template-columns:1fr 1fr;gap:10px}

/* testimonials */
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:38px}
.quote{background:var(--card);border:1px solid var(--line);border-left:3px solid var(--brass);border-radius:8px;padding:24px}
.quote p{font-size:.95rem;margin-bottom:14px}
.quote cite{font-family:var(--mono);font-size:.72rem;font-style:normal;color:var(--faint)}

/* CTA band */
.band{background:var(--spruce);color:var(--paper-ink)}
.band .wrap{display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;padding-top:54px;padding-bottom:54px}
.band h2{color:#fff}
.band p{color:rgba(240,234,222,.75)}

/* FAQ */
.faq{max-width:760px}
.faq details{border-bottom:1px solid var(--line);padding:18px 0}
.faq summary{font-family:var(--display);font-weight:600;font-size:1.05rem;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::after{content:"+";font-family:var(--mono);color:var(--brass-deep)}
.faq details[open] summary::after{content:"–"}
.faq details p{margin-top:10px;color:var(--faint);font-size:.95rem;max-width:60ch}

/* forms */
.form{display:grid;gap:12px;max-width:460px}
.form input,.form select,.form textarea{font-family:var(--body);font-size:.95rem;padding:13px 14px;border:1px solid var(--line);border-radius:6px;background:var(--card);color:var(--ink);width:100%}
.form input:focus,.form textarea:focus,.form select:focus{outline:2px solid var(--brass);outline-offset:1px}
.form label{font-family:var(--mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--faint)}
.form .ok{background:rgba(74,90,72,.15);border:1px solid var(--spruce);border-radius:6px;padding:16px;font-size:.95rem}
.form .fail{background:rgba(138,101,40,.1);border:1px solid var(--brass);border-radius:6px;padding:16px;font-size:.95rem;margin-top:8px}
.form .fail a{color:var(--brass-deep);font-weight:600}
.hp-trap{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden;opacity:0;pointer-events:none}

/* footer */
footer{background:var(--ink);color:var(--paper-ink);padding:56px 0 40px;margin-top:0}
footer .wrap{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px}
footer h4{font-family:var(--mono);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;color:var(--brass);margin-bottom:14px}
footer a{color:rgba(240,234,222,.75);text-decoration:none;display:block;padding:4px 0;font-size:.9rem}
footer a:hover{color:#fff}
footer .fine{grid-column:1/-1;border-top:1px solid rgba(255,255,255,.12);margin-top:34px;padding-top:20px;font-family:var(--mono);font-size:.66rem;color:rgba(240,234,222,.45);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* reveal on scroll */
.rev{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
.rev.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.rev{opacity:1;transform:none;transition:none}}

/* responsive */
@media(max-width:900px){
  .hero .wrap{grid-template-columns:1fr}
  .grid3,.steps,.projects,.quotes{grid-template-columns:1fr 1fr}
  footer .wrap{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  nav.main{display:none;position:absolute;top:68px;left:0;right:0;background:var(--paper);border-bottom:1px solid var(--line);flex-direction:column;padding:18px 24px;gap:16px;align-items:flex-start}
  nav.main.open{display:flex}
  .menu-btn{display:block}
  .compare,.grid3,.steps,.projects,.quotes{grid-template-columns:1fr}
  footer .wrap{grid-template-columns:1fr}
  section{padding:52px 0}
}

/* ============ technical briefs ============ */
.brief{max-width:760px;margin:0 auto;padding:56px 24px 80px}
.brief-hd{border-bottom:2px solid var(--ink);padding-bottom:22px;margin-bottom:34px}
.brief-hd .no{font-family:var(--mono);font-size:.72rem;letter-spacing:.18em;color:var(--brass-deep)}
.brief-hd h1{font-size:clamp(1.8rem,4vw,2.6rem);margin:10px 0 8px}
.brief-hd .abs{color:var(--faint);font-size:1.02rem}
.brief-meta{display:flex;gap:22px;flex-wrap:wrap;margin-top:16px}
.brief-meta span{font-family:var(--mono);font-size:.66rem;letter-spacing:.1em;color:var(--faint)}
.brief h2{font-size:1.35rem;margin:38px 0 12px}
.brief p{margin-bottom:16px;max-width:66ch}
.brief .callout{background:var(--card);border:1px solid var(--line);border-left:3px solid var(--brass);border-radius:6px;padding:20px 22px;margin:26px 0;font-size:.95rem}
.brief .specbox{background:var(--panel);color:var(--paper-ink);border-radius:8px;padding:26px;margin:34px 0}
.brief .specbox h3{color:var(--brass);font-family:var(--mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;margin-bottom:14px}
.brief .specbox li{list-style:none;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.08);font-size:.92rem;display:flex;gap:10px}
.brief .specbox li::before{content:"—";color:var(--brass)}
.brief .refs{font-size:.82rem;color:var(--faint);border-top:1px solid var(--line);padding-top:18px;margin-top:44px}
.brief .refs b{font-family:var(--mono);font-size:.68rem;letter-spacing:.14em}
.brief-list{display:grid;gap:20px;margin-top:38px}
.brief-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:8px;padding:26px;text-decoration:none;transition:border-color .15s}
.brief-card:hover{border-color:var(--brass)}
.brief-card .no{font-family:var(--mono);font-size:.68rem;letter-spacing:.16em;color:var(--brass-deep)}
.brief-card h3{margin:8px 0 6px}
.brief-card p{color:var(--faint);font-size:.92rem}
.brief-card.soon{opacity:.55;pointer-events:none}