/* ==========================================================================
   BerdAu Empire — site stylesheet
   One file, no build step. Sections:
   01 tokens  02 reset  03 type  04 layout  05 chrome  06 hero  07 components
   08 prose   09 forms  10 footer  11 utilities  12 responsive
   ========================================================================== */

/* 01 tokens ---------------------------------------------------------------- */
:root{
  --ink:#080d14; --ink-2:#0b1119; --panel:#0e1621; --panel-2:#121d2a;
  --line:#223247; --line-soft:#192636;
  --muted:#90a0b7; --soft:#c8d3e3; --white:#f4f7fb;
  --teal:#20d573; --teal-soft:#74f4bb; --teal-dim:rgba(32,213,115,.1);
  --violet:#8a2be2; --violet-soft:#bd80ff;
  --amber:#ffa502; --amber-soft:#ffd27b;

  --display:"Space Grotesk", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --sans:"DM Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono:ui-monospace, "SF Mono", "Cascadia Mono", "JetBrains Mono", Consolas, monospace;

  --r-lg:24px; --r-md:16px; --r-sm:10px;
  --wrap:1200px; --pad:28px;
  --ease:cubic-bezier(.22,1,.36,1);
}

/* 02 reset ----------------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%; scroll-behavior:smooth}
body{
  margin:0; background:var(--ink); color:var(--white);
  font-family:var(--sans); font-size:16px; line-height:1.6;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
body::before{
  content:""; position:fixed; inset:0; z-index:0; pointer-events:none;
  background:
    radial-gradient(880px 420px at 50% -170px, rgba(32,213,115,.11), transparent 72%),
    radial-gradient(700px 400px at 94% -80px, rgba(138,43,226,.09), transparent 72%);
}
img{max-width:100%; display:block}
svg{display:block}
a{color:inherit}
button{font:inherit}
::selection{background:rgba(32,213,115,.28); color:#fff}
:focus-visible{outline:2px solid var(--teal); outline-offset:3px; border-radius:3px}
.skip{
  position:absolute; left:-9999px; top:0; z-index:200;
  background:var(--teal); color:#04140c; padding:12px 18px; font-weight:600;
}
.skip:focus{left:12px; top:12px}
.sheet-bg{position:relative; z-index:1}

/* 03 type ------------------------------------------------------------------ */
h1,h2,h3,h4{
  font-family:var(--display); font-weight:600; letter-spacing:-.028em;
  line-height:1.08; margin:0; text-wrap:balance;
}
h1{font-size:clamp(37px,5vw,58px)}
h2{font-size:clamp(26px,3.3vw,38px)}
h3{font-size:clamp(18px,2vw,21px); line-height:1.25; letter-spacing:-.018em}
h4{font-size:15px; letter-spacing:-.01em; line-height:1.35}
p{margin:0}
em{font-style:normal; color:var(--teal)}
.lede{font-size:clamp(16px,1.7vw,18.5px); line-height:1.66; color:var(--soft); max-width:56ch}
.kicker{
  display:inline-flex; align-items:center; gap:10px;
  font-family:var(--mono); font-size:10.5px; letter-spacing:.2em;
  text-transform:uppercase; color:var(--teal);
}
.kicker::before{content:""; width:20px; height:1px; background:currentColor; opacity:.55}
.kicker.plain::before{display:none}
.mono{font-family:var(--mono); font-size:11px; letter-spacing:.12em; text-transform:uppercase; color:var(--muted)}

/* 04 layout ---------------------------------------------------------------- */
.wrap{max-width:var(--wrap); margin:0 auto; padding:0 var(--pad)}
.section{padding:88px 0}
.section.tight{padding:56px 0}
.section-head{
  display:flex; align-items:flex-end; justify-content:space-between;
  gap:32px; flex-wrap:wrap; margin-bottom:36px;
  padding-bottom:18px; border-bottom:1px solid var(--line);
}
.section-head .head-text{max-width:62ch}
.section-head h2{margin-top:14px}
.section-head p{margin-top:12px; color:var(--muted); font-size:14.5px; max-width:52ch; line-height:1.6}
.eyebrow-num{
  font-family:var(--mono); font-size:10px; letter-spacing:.18em;
  color:#5d7a6c; text-transform:uppercase;
}

/* 05 chrome ---------------------------------------------------------------- */
.topbar{
  position:sticky; top:0; z-index:100;
  background:rgba(8,13,20,.82); backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.topbar-in{height:68px; display:flex; align-items:center; justify-content:space-between; gap:20px}
.brand{display:inline-flex; align-items:center; gap:11px; text-decoration:none}
.monogram{
  width:31px; height:31px; flex:0 0 auto; border-radius:9px;
  border:1px solid var(--line); background:rgba(32,213,115,.07);
  display:grid; place-items:center;
  font-family:var(--display); font-weight:700; font-size:12px;
  color:var(--teal); letter-spacing:.01em;
}
.brand-txt{display:flex; flex-direction:column; line-height:1.14}
.brand-txt b{font-family:var(--display); font-weight:600; font-size:13.5px; letter-spacing:.045em}
.brand-txt span{font-family:var(--mono); font-size:9px; letter-spacing:.17em; color:var(--muted); text-transform:uppercase}

.nav{display:flex; align-items:center; gap:2px}
.nav-right{display:flex; align-items:center; gap:10px; min-width:0}
a.rung,a.track,a.note{text-decoration:none; color:inherit}
.nav a{
  font-size:13.5px; color:var(--soft); text-decoration:none;
  padding:8px 12px; border-radius:8px; border:1px solid transparent;
  transition:color .16s, background .16s, border-color .16s;
}
.nav a:hover{color:var(--white); background:var(--panel)}
.nav a[aria-current="page"]{color:var(--teal); border-color:rgba(32,213,115,.3); background:rgba(32,213,115,.07)}
.nav-cta{margin-left:8px}

.nav-toggle{display:none; width:40px; height:40px; border-radius:9px; border:1px solid var(--line); background:transparent; color:var(--soft); cursor:pointer; align-items:center; justify-content:center}
.nav-toggle:hover{color:var(--white); border-color:#33485f}

/* buttons */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:9px;
  height:46px; padding:0 20px; border-radius:11px; border:1px solid transparent;
  font-family:var(--sans); font-size:14.5px; font-weight:600; letter-spacing:-.005em;
  text-decoration:none; cursor:pointer; white-space:nowrap;
  transition:transform .16s var(--ease), background .16s, border-color .16s, color .16s, box-shadow .16s;
}
.btn.primary{
  background:var(--teal); color:#04140c; border-color:var(--teal);
  box-shadow:0 10px 30px -14px rgba(32,213,115,.6);
}
.btn.primary:hover{background:var(--teal-soft); border-color:var(--teal-soft); transform:translateY(-1px)}
.btn.ghost{background:transparent; color:var(--soft); border-color:var(--line)}
.btn.ghost:hover{color:var(--white); border-color:#3a526b; background:var(--panel)}
.btn.sm{height:38px; padding:0 15px; font-size:13px; border-radius:9px}
.btn .arrow{transition:transform .16s var(--ease)}
.btn:hover .arrow{transform:translateX(3px)}

/* 06 hero ------------------------------------------------------------------ */
.hero{padding:74px 0 0; position:relative}
.hero-grid{display:grid; grid-template-columns:minmax(0,1.3fr) minmax(0,.7fr); gap:52px; align-items:start}
.hero h1{margin-top:22px}
.hero .lede{margin-top:22px}
.hero-actions{display:flex; gap:11px; flex-wrap:wrap; margin-top:32px}
.hero-foot{
  display:flex; gap:24px; flex-wrap:wrap; margin-top:26px;
  font-family:var(--mono); font-size:10px; letter-spacing:.13em;
  text-transform:uppercase; color:#6d7c90;
}
.hero-foot span{display:inline-flex; align-items:center; gap:7px}
.hero-foot span::before{content:""; width:4px; height:4px; border-radius:50%; background:var(--teal); opacity:.8}

/* signal card */
.signal{
  border:1px solid var(--line); border-radius:var(--r-lg);
  background:linear-gradient(180deg, var(--panel) 0%, rgba(11,17,25,.92) 100%);
  padding:22px; position:relative; overflow:hidden;
}
.signal::after{
  content:""; position:absolute; right:-60px; top:-60px; width:180px; height:180px;
  background:radial-gradient(circle, rgba(32,213,115,.18), transparent 68%);
  pointer-events:none;
}
.signal-head{
  display:flex; align-items:center; justify-content:space-between; gap:12px;
  padding-bottom:14px; border-bottom:1px solid var(--line-soft);
}
.signal-head .label{font-family:var(--mono); font-size:9.5px; letter-spacing:.16em; text-transform:uppercase; color:var(--muted)}
.live{display:inline-flex; align-items:center; gap:6px; font-family:var(--mono); font-size:9.5px; letter-spacing:.14em; text-transform:uppercase; color:var(--teal)}
.live i{width:5px; height:5px; border-radius:50%; background:var(--teal); box-shadow:0 0 0 0 rgba(32,213,115,.6); animation:pulse 2.6s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(32,213,115,.5)}70%{box-shadow:0 0 0 7px rgba(32,213,115,0)}100%{box-shadow:0 0 0 0 rgba(32,213,115,0)}}
.loop{list-style:none; margin:6px 0 0; padding:0}
.loop li{display:grid; grid-template-columns:24px 1fr; gap:12px; padding:14px 0; border-bottom:1px solid var(--line-soft)}
.loop li:last-child{border-bottom:0; padding-bottom:4px}
.loop .n{font-family:var(--mono); font-size:9.5px; color:#5d7a6c; letter-spacing:.1em; padding-top:3px}
.loop b{display:block; font-family:var(--display); font-size:14.5px; font-weight:600; letter-spacing:-.008em; color:var(--white)}
.loop p{font-size:12.5px; color:var(--muted); line-height:1.5; margin-top:3px}
.signal-foot{
  margin-top:14px; padding-top:14px; border-top:1px solid var(--line-soft);
  font-family:var(--mono); font-size:9.5px; letter-spacing:.1em; color:#5d7a6c; text-transform:uppercase;
  display:flex; justify-content:space-between; gap:10px;
}

/* 07 components ------------------------------------------------------------ */
/* tracks */
.tracks{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:16px}
.track{
  position:relative; display:flex; flex-direction:column; gap:14px;
  padding:24px 22px 20px; border:1px solid var(--line); border-radius:var(--r-md);
  background:linear-gradient(180deg, var(--panel) 0%, var(--ink-2) 100%);
  text-decoration:none; overflow:hidden;
  transition:border-color .2s, transform .2s var(--ease), box-shadow .2s;
}
.track:hover{
  border-color:rgba(32,213,115,.42); transform:translateY(-3px);
  box-shadow:0 20px 44px -26px rgba(0,0,0,.95);
}
.track-num{
  font-family:var(--display); font-weight:700; font-size:52px; line-height:1;
  color:rgba(32,213,115,.14); letter-spacing:-.04em;
}
.track h3{margin-top:-4px; color:var(--white)}
.note h3{color:var(--white)}
.rung b{color:var(--white)}
.track .outcome{font-size:13.5px; color:var(--muted); line-height:1.58}
.track-meta{
  margin-top:auto; padding-top:14px; border-top:1px solid var(--line-soft);
  display:flex; flex-wrap:wrap; gap:8px 14px;
  font-family:var(--mono); font-size:9.5px; letter-spacing:.1em; text-transform:uppercase; color:#6d7c90;
}
.track-meta b{color:var(--soft); font-weight:500}
.track-go{
  display:inline-flex; align-items:center; gap:7px; margin-top:2px;
  font-size:13px; font-weight:600; color:var(--teal);
}
.track:hover .track-go .arrow{transform:translateX(3px)}
.track-go .arrow{transition:transform .18s var(--ease)}

/* ladder */
.ladder{display:grid; gap:1px; background:var(--line); border:1px solid var(--line); border-radius:var(--r-md); overflow:hidden}
.rung{
  background:var(--ink-2); padding:19px 22px;
  display:grid; grid-template-columns:64px minmax(0,1fr) auto; gap:18px; align-items:center;
}
.rung:hover{background:#0e1721}
.rung .step{font-family:var(--mono); font-size:10px; letter-spacing:.14em; color:#5d7a6c; text-transform:uppercase}
.rung b{display:block; font-family:var(--display); font-size:16px; font-weight:600; letter-spacing:-.012em}
.rung p{font-size:13px; color:var(--muted); margin-top:3px; line-height:1.5}
.rung .tag{font-family:var(--mono); font-size:9.5px; letter-spacing:.1em; text-transform:uppercase; color:var(--muted); border:1px solid var(--line); border-radius:5px; padding:4px 8px; white-space:nowrap}

/* note cards */
.notes{display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:16px}
.note{
  display:flex; flex-direction:column; gap:12px; padding:22px;
  border:1px solid var(--line); border-radius:var(--r-md); background:var(--ink-2);
  text-decoration:none; transition:border-color .2s, background .2s;
}
.note:hover{border-color:rgba(32,213,115,.38); background:#0f1823}
.note .meta{
  display:flex; align-items:center; gap:10px; flex-wrap:wrap;
  font-family:var(--mono); font-size:9.5px; letter-spacing:.13em; text-transform:uppercase; color:#6d7c90;
}
.note .meta .dot{width:3px; height:3px; border-radius:50%; background:#3d5570}
.note h3{font-size:18.5px}
.note p{font-size:13.5px; color:var(--muted); line-height:1.6}
.note .read{margin-top:auto; padding-top:8px; font-size:12.5px; color:var(--teal); font-weight:600; display:inline-flex; align-items:center; gap:6px}

/* callout */
.callout{
  border:1px solid var(--line); border-left:2px solid var(--teal);
  border-radius:0 var(--r-sm) var(--r-sm) 0; padding:16px 20px;
  background:rgba(32,213,115,.045); margin:28px 0;
}
.callout .label{
  display:block; font-family:var(--mono); font-size:9.5px; letter-spacing:.16em;
  text-transform:uppercase; color:var(--teal); margin-bottom:7px;
}
.callout p{font-size:14.5px; color:var(--soft); line-height:1.65}
.callout p + p{margin-top:10px}
.reality{border-left-color:var(--amber); background:rgba(255,165,2,.05)}
.reality .label{color:var(--amber-soft)}

/* steps / curriculum */
.steps{list-style:none; counter-reset:s; margin:0; padding:0}
.steps > li{
  counter-increment:s; position:relative;
  padding:0 0 26px 46px; border-left:1px solid var(--line); margin-left:13px;
}
.steps > li:last-child{border-left-color:transparent; padding-bottom:0}
.steps > li::before{
  content:counter(s,decimal-leading-zero); position:absolute; left:-13px; top:0;
  width:26px; height:26px; border-radius:50%;
  background:var(--ink); border:1px solid var(--line);
  display:grid; place-items:center;
  font-family:var(--mono); font-size:9px; color:var(--teal); letter-spacing:0;
}
.steps h4{margin-bottom:7px; padding-top:2px}
.steps p{font-size:14.5px; color:var(--muted); line-height:1.66}
.steps ul{margin:9px 0 0; padding-left:17px}
.steps ul li{font-size:14px; color:var(--muted); line-height:1.66; margin-bottom:4px}

/* checklist */
.check{list-style:none; margin:18px 0 0; padding:0; display:grid; gap:9px}
.check li{
  display:grid; grid-template-columns:18px 1fr; gap:10px;
  font-size:14.5px; color:var(--soft); line-height:1.6;
}
.check li::before{
  content:""; width:13px; height:13px; margin-top:5px; border-radius:3px;
  border:1px solid rgba(32,213,115,.45); background:rgba(32,213,115,.1);
}

/* pills + meta */
.pill{
  display:inline-flex; align-items:center; gap:6px;
  font-family:var(--mono); font-size:9.5px; letter-spacing:.1em; text-transform:uppercase;
  padding:4px 9px; border-radius:999px; border:1px solid;
}
.pill.teal{color:var(--teal); border-color:rgba(32,213,115,.34); background:rgba(32,213,115,.08)}
.pill.violet{color:var(--violet-soft); border-color:rgba(189,128,255,.3); background:rgba(138,43,226,.13)}
.pill.amber{color:var(--amber-soft); border-color:rgba(255,210,123,.28); background:rgba(255,165,2,.1)}
.pill.grey{color:var(--muted); border-color:var(--line); background:transparent}

/* table */
.table-wrap{overflow-x:auto; border:1px solid var(--line); border-radius:var(--r-md); margin:26px 0}
table{width:100%; border-collapse:collapse; font-size:14px; min-width:560px}
thead th{
  text-align:left; padding:12px 16px; background:var(--panel);
  font-family:var(--mono); font-size:9.5px; letter-spacing:.14em; text-transform:uppercase;
  color:var(--muted); font-weight:500; border-bottom:1px solid var(--line); white-space:nowrap;
}
tbody td{padding:13px 16px; border-bottom:1px solid var(--line-soft); color:var(--soft); vertical-align:top; line-height:1.55}
tbody tr:last-child td{border-bottom:0}
tbody td:first-child{color:var(--white); font-weight:500}
tbody tr:hover{background:rgba(32,213,115,.025)}

/* 08 prose ----------------------------------------------------------------- */
.prose{max-width:70ch; font-size:16.5px; line-height:1.75; color:var(--soft)}
.prose > * + *{margin-top:20px}
.prose h2{margin-top:52px; font-size:clamp(23px,2.6vw,29px); color:var(--white); line-height:1.2}
.prose h3{margin-top:34px; color:var(--white)}
.prose h2 + *, .prose h3 + *{margin-top:12px}
.prose strong{color:var(--white); font-weight:600}
.prose a{color:var(--teal-soft); text-decoration:underline; text-decoration-color:rgba(116,244,187,.35); text-underline-offset:3px}
.prose a:hover{text-decoration-color:var(--teal-soft)}
.prose ul, .prose ol{padding-left:20px; margin-top:14px}
.prose li{margin-bottom:9px}
.prose li::marker{color:var(--teal)}
.prose blockquote{
  margin:30px 0; padding:4px 0 4px 20px; border-left:2px solid var(--teal);
  font-family:var(--display); font-size:19px; line-height:1.45; color:var(--white); letter-spacing:-.014em;
}
.prose code{
  font-family:var(--mono); font-size:.88em; color:var(--amber-soft);
  background:rgba(255,165,2,.09); padding:2px 5px; border-radius:4px;
}
.prose pre{
  margin:24px 0; padding:18px; background:#0a1017; border:1px solid var(--line);
  border-radius:var(--r-sm); overflow-x:auto;
  font-family:var(--mono); font-size:12.5px; line-height:1.7; color:var(--soft);
}
.prose pre code{background:none; padding:0; color:inherit; font-size:inherit}
.prose hr{border:0; border-top:1px solid var(--line); margin:44px 0}
.prose figure{margin:32px 0}
.prose figcaption{font-size:12px; color:#6d7c90; margin-top:9px; font-family:var(--mono); letter-spacing:.04em}

/* article header */
.article-head{padding:56px 0 34px; border-bottom:1px solid var(--line)}
.article-head .kicker{margin-bottom:18px}
.article-head h1{font-size:clamp(30px,4.4vw,46px); max-width:20ch; line-height:1.1}
.article-head .dek{margin-top:18px; font-size:17px; color:var(--muted); max-width:60ch; line-height:1.65}
.article-meta{
  display:flex; align-items:center; gap:16px; flex-wrap:wrap; margin-top:26px;
  font-family:var(--mono); font-size:10px; letter-spacing:.12em; text-transform:uppercase; color:#6d7c90;
}
.article-meta .dot{width:3px; height:3px; border-radius:50%; background:#3d5570}
.article-body{padding:44px 0 0}
.article-body > .wrap > .prose,
.article-body > .wrap > .prevnext{max-width:min(70ch,100%); margin-inline:auto}
.table-wrap table.t td:nth-child(3){white-space:nowrap}

/* progress bar */
.progress{position:fixed; top:0; left:0; height:2px; width:0; background:var(--teal); z-index:120; transition:width .1s linear}

/* toc */
.toc{
  border:1px solid var(--line); border-radius:var(--r-md); padding:18px 20px;
  background:var(--panel); margin:8px 0 34px; max-width:520px;
}
.toc p{font-family:var(--mono); font-size:9.5px; letter-spacing:.16em; text-transform:uppercase; color:var(--muted); margin-bottom:11px}
.toc ol{margin:0; padding-left:18px; display:grid; gap:7px}
.toc li{font-size:13.5px; color:var(--soft)}
.toc a{text-decoration:none; color:inherit}
.toc a:hover{color:var(--teal)}

/* prev / next */
.prevnext{display:grid; grid-template-columns:1fr 1fr; gap:14px; margin:64px 0 0; padding-top:30px; border-top:1px solid var(--line)}
.prevnext a{
  display:flex; flex-direction:column; gap:6px; padding:18px;
  border:1px solid var(--line); border-radius:var(--r-md); text-decoration:none;
  transition:border-color .18s, background .18s;
}
.prevnext a:hover{border-color:rgba(32,213,115,.4); background:var(--panel)}
.prevnext .dir{font-family:var(--mono); font-size:9.5px; letter-spacing:.14em; text-transform:uppercase; color:#6d7c90}
.prevnext b{font-family:var(--display); font-size:15.5px; font-weight:600; letter-spacing:-.012em}
.prevnext .next{text-align:right; align-items:flex-end}

/* 09 forms ----------------------------------------------------------------- */
.subscribe{
  border:1px solid var(--line); border-radius:var(--r-lg); padding:34px;
  background:
    radial-gradient(500px 200px at 88% 0%, rgba(32,213,115,.14), transparent 70%),
    linear-gradient(180deg, var(--panel) 0%, var(--ink-2) 100%);
  display:grid; grid-template-columns:minmax(0,1fr) minmax(0,.92fr); gap:38px; align-items:center;
}
.subscribe h2{font-size:clamp(24px,2.9vw,32px); max-width:18ch}
.subscribe p{margin-top:12px; color:var(--muted); font-size:14.5px; line-height:1.62; max-width:44ch}
.sub-form{display:flex; flex-direction:column; gap:9px}
.field-row{display:flex; gap:9px}
.sub-form input[type=email]{
  flex:1; min-width:0; height:48px; padding:0 15px;
  background:rgba(8,13,20,.75); border:1px solid var(--line); border-radius:10px;
  color:var(--white); font:inherit; font-size:14.5px;
}
.sub-form input[type=email]::placeholder{color:#63748a}
.sub-form input[type=email]:focus{outline:none; border-color:rgba(32,213,115,.55); box-shadow:0 0 0 3px rgba(32,213,115,.11)}
.sub-form .btn{height:48px}
.form-note{font-size:11.5px; color:#6d7c90; line-height:1.5}
.form-status{font-size:12.5px; color:var(--teal-soft); min-height:18px}
.form-status.err{color:#ff9b8a}
.hp{position:absolute; left:-9999px; opacity:0; height:0; width:0}

/* 10 footer ---------------------------------------------------------------- */
.footer{border-top:1px solid var(--line); padding:52px 0 40px; margin-top:40px}
.foot-grid{display:grid; grid-template-columns:1.6fr 1fr 1fr 1fr; gap:38px}
.foot-brand p{margin-top:14px; font-size:13px; color:var(--muted); line-height:1.65; max-width:34ch}
.foot-col h4{
  font-family:var(--mono); font-size:9.5px; letter-spacing:.16em; text-transform:uppercase;
  color:#6d7c90; font-weight:500; margin-bottom:14px;
}
.foot-col ul{list-style:none; margin:0; padding:0; display:grid; gap:9px}
.foot-col a{font-size:13px; color:var(--soft); text-decoration:none}
.foot-col a:hover{color:var(--teal)}
.foot-bottom{
  margin-top:44px; padding-top:22px; border-top:1px solid var(--line-soft);
  display:flex; justify-content:space-between; gap:18px; flex-wrap:wrap;
  font-size:11.5px; color:#63748a;
}
.foot-bottom p{max-width:64ch; line-height:1.6}

/* 11 utilities ------------------------------------------------------------- */
.center{text-align:center}
.mt-0{margin-top:0}
.mt-1{margin-top:12px}
.mt-2{margin-top:22px}
.mt-3{margin-top:34px}
.stack > * + *{margin-top:16px}
.sr{position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(0 0 0 0); white-space:nowrap}
.crest{
  width:220px; height:220px; border-radius:50%; object-fit:cover; margin:0 auto;
  border:1px solid var(--line); box-shadow:0 0 0 6px rgba(32,213,115,.04);
}
.split{display:grid; grid-template-columns:minmax(0,1fr) 300px; gap:52px; align-items:start}
.sticky-side{position:sticky; top:96px}

/* 12 responsive ------------------------------------------------------------ */
@media(max-width:1040px){
  .hero-grid{grid-template-columns:1fr; gap:38px}
  .tracks{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr; gap:30px}
  .split{grid-template-columns:1fr; gap:34px}
  .sticky-side{position:static}
  .subscribe{grid-template-columns:1fr; gap:24px; padding:28px}
}
@media(max-width:880px){
  .nav{
    position:fixed; inset:68px 0 auto 0; flex-direction:column; align-items:stretch;
    gap:2px; padding:14px 20px 22px; background:var(--ink);
    border-bottom:1px solid var(--line); display:none; z-index:99;
  }
  .nav.open{display:flex}
  .nav a{padding:12px; font-size:15px}
  .nav-cta{margin:8px 0 0}
  .nav-toggle{display:inline-flex}
  .notes{grid-template-columns:1fr}
  .rung{grid-template-columns:1fr; gap:8px}
  .rung .tag{justify-self:start}
  .prevnext{grid-template-columns:1fr}
}
@media(max-width:640px){
  :root{--pad:18px}
  .section{padding:60px 0}
  .hero{padding:44px 0 0}
  .hero-actions .btn{flex:1 1 100%}
  .article-head{padding:36px 0 26px}
  .prose{font-size:16px}
  .foot-grid{grid-template-columns:1fr; gap:26px}
  .field-row{flex-direction:column}
  .sub-form .btn{width:100%}
  .signal{padding:18px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.001ms !important; animation-duration:.001ms !important; animation-iteration-count:1 !important}
}