/* Layout: a quiet ledger. Narrow measure, left-aligned, one dark band per page for the thesis. */
:root{
  --bg:#f7f8fa;          /* cool off-white */
  --bg-2:#eef0f4;        /* recessed panel */
  --ink:#141a22;         /* near-black, blue bias */
  --ink-2:#4a5563;       /* secondary text */
  --line:#d6dae2;
  --accent:#1f5a47;      /* marine green */
  --accent-ink:#ffffff;
  --band:#141a22;        /* dark band */
  --band-ink:#eef0f4;
  --band-muted:#9aa4b2;
  --display:"Archivo","Helvetica Neue",Arial,sans-serif;
  --body:"Source Serif 4",Georgia,"Times New Roman",serif;
  --max:1120px;
  --measure:62ch;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#0f1419;--bg-2:#161c24;--ink:#e8ebf0;--ink-2:#a4adba;--line:#2a323d;
    --accent:#5fb092;--accent-ink:#0f1419;--band:#161c24;--band-ink:#e8ebf0;--band-muted:#8a94a3;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --bg:#0f1419;--bg-2:#161c24;--ink:#e8ebf0;--ink-2:#a4adba;--line:#2a323d;
  --accent:#5fb092;--accent-ink:#0f1419;--band:#161c24;--band-ink:#e8ebf0;--band-muted:#8a94a3;
  color-scheme:dark;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:1.0625rem;line-height:1.6}
a{color:inherit}
img{max-width:100%}
h1,h2,h3{font-family:var(--display);font-weight:600;line-height:1.1;letter-spacing:-.015em;text-wrap:balance;margin:0}
h1{font-size:clamp(2.1rem,5vw,3.4rem)}
h2{font-size:clamp(1.5rem,2.8vw,2rem)}
h3{font-size:1.1rem;font-weight:600}
p{margin:0}
.wrap{max-width:var(--max);margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.eyebrow{font-family:var(--display);font-size:.75rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}
.band .eyebrow{color:var(--band-muted)}
.muted{color:var(--ink-2)}

/* header */
.site-head{border-bottom:1px solid var(--line);background:var(--bg)}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding-block:1.1rem;flex-wrap:wrap}
.brand{font-family:var(--display);font-weight:700;letter-spacing:-.01em;text-decoration:none;font-size:1.05rem;display:flex;align-items:center;gap:.6rem}
.brand .mark{width:32px;height:30px;color:var(--accent);flex:none}
.brand-text{display:grid;line-height:1.05}
.brand-name{font-size:1.05rem;letter-spacing:.01em;text-transform:uppercase}
.brand-sub{font-weight:500;color:var(--ink-2);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase}
.foot-brand{display:flex;gap:.8rem;align-items:center;font-family:var(--display);font-weight:600;color:var(--ink)}
.foot-brand .mark{width:30px;height:28px;color:var(--accent);flex:none}
.foot-brand .muted{font-weight:400;font-family:var(--body)}
nav ul{list-style:none;margin:0;padding:0;display:flex;gap:1.4rem;flex-wrap:wrap;font-family:var(--display);font-size:.9rem}
nav a{text-decoration:none;color:var(--ink-2);padding-block:.25rem;border-bottom:2px solid transparent}
nav a:hover,nav a:focus-visible{color:var(--ink)}
nav a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--accent)}
nav a.cta{color:var(--accent);font-weight:600}

/* bands & sections */
.band{background:var(--band);color:var(--band-ink)}
.band .wrap{padding-block:clamp(3rem,7vw,5.5rem)}
.hero{display:grid;gap:1.4rem;max-width:46rem}
.hero p{font-size:1.15rem;max-width:var(--measure)}
.hero .actions{display:flex;gap:.8rem;flex-wrap:wrap;margin-top:.4rem}
.btn{font-family:var(--display);font-weight:600;font-size:.95rem;text-decoration:none;padding:.75rem 1.2rem;border-radius:3px;display:inline-block;border:1px solid transparent}
.btn.primary{background:var(--accent);color:var(--accent-ink)}
.btn.ghost{border-color:var(--band-muted);color:var(--band-ink)}
.light .btn.ghost{border-color:var(--line);color:var(--ink)}
.btn:focus-visible,a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:3px}

section.block .wrap{padding-block:clamp(2.6rem,6vw,4.5rem)}
section.block + section.block{border-top:1px solid var(--line)}
.block.recess{background:var(--bg-2)}
.head{display:grid;gap:.6rem;max-width:var(--measure);margin-bottom:2rem}
.prose{max-width:var(--measure);display:grid;gap:1rem}
.cols{display:grid;gap:2rem;grid-template-columns:1fr}
@media(min-width:760px){.cols{grid-template-columns:minmax(0,1fr) minmax(0,2fr)}}
.grid{display:grid;gap:1.6rem;grid-template-columns:1fr}
@media(min-width:640px){.grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:960px){.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}}
.grid>div{min-width:0;display:grid;gap:.5rem;align-content:start}
.grid>div p{color:var(--ink-2);font-size:1rem}

/* criteria ledger */
.ledger{border-top:1px solid var(--line);max-width:52rem}
.ledger .row{display:grid;gap:.3rem 2rem;padding-block:1.1rem;border-bottom:1px solid var(--line);grid-template-columns:1fr}
@media(min-width:640px){.ledger .row{grid-template-columns:12rem minmax(0,1fr)}}
.ledger dt{font-family:var(--display);font-weight:600;font-size:.95rem}
.ledger dd{margin:0;color:var(--ink-2)}
.ledger dd strong{color:var(--ink);font-weight:600}

/* process */
.steps{counter-reset:s;list-style:none;margin:0;padding:0;max-width:52rem;display:grid}
.steps li{counter-increment:s;display:grid;grid-template-columns:3rem minmax(0,1fr);gap:.2rem 1rem;padding-block:1.3rem;border-top:1px solid var(--line)}
.steps li::before{content:counter(s,decimal-leading-zero);font-family:var(--display);font-weight:600;color:var(--accent);font-variant-numeric:tabular-nums;grid-row:1/span 3}
.steps h3{margin:0}
.steps .when{font-family:var(--display);font-size:.8rem;color:var(--ink-2);letter-spacing:.04em}
.steps p{color:var(--ink-2)}

/* about */
.timeline{list-style:none;margin:0;padding:0;display:grid;gap:.9rem;max-width:var(--measure)}
.timeline li{display:grid;grid-template-columns:6.5rem minmax(0,1fr);gap:1rem;border-top:1px solid var(--line);padding-top:.8rem}
.timeline .yr{font-family:var(--display);font-size:.85rem;color:var(--ink-2);font-variant-numeric:tabular-nums;padding-top:.15rem}
.timeline strong{display:block;font-family:var(--display);font-weight:600;font-size:.98rem}
.timeline span{color:var(--ink-2);font-size:.98rem}

/* contact */
.contact-card{display:grid;gap:.4rem;padding:1.4rem;border:1px solid var(--line);background:var(--bg-2);max-width:32rem}
.contact-card .big{font-family:var(--display);font-size:1.35rem;font-weight:600;word-break:break-all;user-select:all}
.contact-card .row{display:flex;gap:.8rem;align-items:center;flex-wrap:wrap}
.copy{font-family:var(--display);font-size:.8rem;font-weight:600;border:1px solid var(--line);background:var(--bg);color:var(--ink);padding:.35rem .7rem;border-radius:3px;cursor:pointer}
.copy:hover{border-color:var(--accent)}

/* footer */
footer{border-top:1px solid var(--line);color:var(--ink-2);font-size:.9rem}
footer .wrap{padding-block:2rem;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap}
footer ul{list-style:none;margin:0;padding:0;display:flex;gap:1.2rem;flex-wrap:wrap;font-family:var(--display);font-size:.85rem}
footer a{text-decoration:none}
footer a:hover{color:var(--ink)}
/* hero motif: repeating arches, drawn from the mark */
.band{position:relative;overflow:hidden;isolation:isolate}
.band .motif{position:absolute;right:-6%;top:50%;transform:translateY(-50%);width:min(52vw,560px);height:auto;opacity:.09;z-index:-1;pointer-events:none}
.band.light .motif{opacity:.08}
@media(max-width:760px){.band .motif{width:120%;right:-50%;opacity:.06}}
.band .wrap{position:relative}
.hero h1{max-width:18ch}
.hero .lede{font-size:1.2rem;color:var(--band-muted)}
.band.light .hero .lede{color:var(--band-muted)}

/* stats strip */
.stats{display:grid;gap:1.5rem;grid-template-columns:repeat(2,minmax(0,1fr));border-top:1px solid var(--line);padding-top:2rem;margin-top:2.6rem}
@media(min-width:760px){.stats{grid-template-columns:repeat(4,minmax(0,1fr))}}
.stat{display:grid;gap:.3rem;min-width:0}
.stat b{font-family:var(--display);font-weight:600;font-size:clamp(1.7rem,3.4vw,2.4rem);letter-spacing:-.02em;line-height:1;font-variant-numeric:tabular-nums}
.stat span{color:var(--ink-2);font-size:.95rem}
.band .stat b{color:var(--band-ink)}
.band .stat span{color:var(--band-muted)}
.band .stats{border-color:color-mix(in srgb,var(--band-muted) 35%,transparent)}

/* letter */
.letter{max-width:var(--measure);display:grid;gap:1rem;font-size:1.1rem}
.letter .sig{font-family:var(--display);font-weight:600;margin-top:.5rem}
.letter .sig span{display:block;font-weight:400;color:var(--ink-2);font-size:.9rem;font-family:var(--body)}
.pull{border-left:3px solid var(--accent);padding-left:1.2rem;font-size:1.3rem;font-style:italic;line-height:1.4;max-width:40ch;color:var(--ink)}

/* faq */
.faq{max-width:52rem;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:1rem;align-items:center;padding-block:1.1rem;font-family:var(--display);font-weight:600;font-size:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.4rem;color:var(--accent);line-height:1;flex:none}
.faq details[open] summary::after{content:"–"}
.faq details p{color:var(--ink-2);padding-bottom:1.2rem;max-width:var(--measure)}

/* fit strip */
.fit{display:grid;gap:2rem;grid-template-columns:1fr}
@media(min-width:760px){.fit{grid-template-columns:1fr 1fr}}
.fit h3{display:flex;gap:.6rem;align-items:center}
.fit h3::before{content:"";width:10px;height:10px;border-radius:50%;background:var(--accent);flex:none}
.fit .no h3::before{background:var(--ink-2);opacity:.5}
.fit ul{margin:.6rem 0 0;padding-left:1.2rem;color:var(--ink-2);display:grid;gap:.4rem}

/* motion */
@media (prefers-reduced-motion:no-preference){
  a,.btn,.copy{transition:color .15s,border-color .15s,background .15s}
  .hero>*{animation:rise .7s cubic-bezier(.2,.7,.2,1) both}
  .hero>*:nth-child(2){animation-delay:.08s}.hero>*:nth-child(3){animation-delay:.16s}.hero>*:nth-child(4){animation-delay:.24s}
  .btn.primary:hover{filter:brightness(1.08)}
  .btn.ghost:hover{border-color:var(--accent)}
}
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}