/* ============================================================
   INFRASTRUCTURE FIELD NOTES — design system
   Paper, ink, steel, copper. Editorial grid, technical labels.
   ============================================================ */

:root{
  --paper:#F7F4EF;
  --paper-2:#F1ECE2;
  --paper-3:#E9E2D4;
  --ink:#17140F;
  --ink-soft:#35322B;
  --muted:#5C584F;
  --rule:#D9D3C6;
  --rule-strong:#B4AC9C;
  --steel:#3F5D73;
  --steel-soft:#6E8798;
  --copper:#8C2F1E;
  --copper-soft:#C96F4A;
  --night:#141619;
  --night-2:#1B1E22;
  --night-3:#22262B;
  --night-rule:#2C3138;
  --night-text:#E7E2D6;
  --night-muted:#A7AEB5;
  --max:1180px;
  --gutter:clamp(1.25rem,4vw,3rem);
  --sans:"IBM Plex Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --serif:"IBM Plex Serif",Charter,Georgia,"Times New Roman",serif;
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

html{
  scroll-behavior:smooth;
  scroll-padding-top:84px;
  scrollbar-color:var(--rule-strong) transparent;
}

body{
  font-family:var(--sans);
  font-size:17px;
  line-height:1.65;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

/* paper grain — texture, not decoration */
body::after{
  content:'';position:fixed;inset:0;pointer-events:none;z-index:2000;
  transform:translateZ(0);opacity:.035;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size:180px;
}

img,svg{max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
ul,ol{list-style:none}
::selection{background:var(--paper-3);color:var(--ink)}
:focus-visible{outline:2px solid var(--steel);outline-offset:3px;border-radius:2px}
.terminal-band :focus-visible{outline-color:var(--copper-soft)}

.wrap{width:min(var(--max),calc(100% - (var(--gutter) * 2)));margin-inline:auto}

.skip{
  position:fixed;top:-70px;left:1rem;z-index:1000;
  background:var(--ink);color:var(--paper);
  padding:.55rem 1rem;border-radius:3px;text-decoration:none;
  font-size:14px;transition:top .18s;
}
.skip:focus{top:1rem}

.progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--copper);z-index:90}

/* ---------- type primitives ---------- */
h1,h2,h3{text-wrap:balance}
p{text-wrap:pretty}

.kicker{
  display:flex;align-items:baseline;gap:.85rem;
  font-family:var(--mono);font-size:11px;font-weight:500;
  letter-spacing:.15em;text-transform:uppercase;color:var(--steel);
  line-height:1.4;
}
.kicker-no{
  color:var(--copper);letter-spacing:.12em;
  padding-right:.85rem;border-right:1px solid var(--rule);
}
.kicker--dark{color:var(--steel-soft)}
.kicker--dark .kicker-no{color:var(--copper-soft);border-right-color:var(--night-rule)}

.sec-head{margin-bottom:clamp(2rem,4vw,3rem)}
.sec-head h2{
  font-family:var(--sans);font-weight:500;
  font-size:clamp(1.8rem,3.2vw,2.45rem);
  line-height:1.12;letter-spacing:-.025em;
  margin-top:.7rem;max-width:24ch;
}
.sec-note{margin-top:.8rem;max-width:62ch;color:var(--muted);font-size:15.5px}

/* ---------- buttons + links ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  min-height:46px;padding:.65rem 1.3rem;
  border:1px solid var(--ink);border-radius:4px;
  font-size:14.5px;font-weight:600;letter-spacing:.01em;
  text-decoration:none;cursor:pointer;
  transition:background-color .18s,color .18s,border-color .18s;
}
.btn-ink{background:var(--ink);color:var(--paper)}
.btn-ink:hover{background:var(--copper);border-color:var(--copper);color:#fff}

.link-arrow{
  display:inline-flex;align-items:center;gap:.4rem;
  font-size:14.5px;font-weight:500;text-decoration:none;
  color:var(--ink);padding-bottom:2px;
  border-bottom:1px solid var(--rule-strong);
  transition:color .18s,border-color .18s;
}
.link-arrow span{transition:transform .18s}
.link-arrow:hover{color:var(--copper);border-color:var(--copper)}
.link-arrow:hover span{transform:translateY(2px)}

/* ---------- header ---------- */
.site-head{
  position:sticky;top:0;z-index:50;
  background:var(--paper);
  border-bottom:1px solid var(--rule);
  transition:border-color .2s;
}
.site-head.scrolled{border-bottom-color:var(--rule-strong)}
.head-inner{display:flex;align-items:center;justify-content:space-between;gap:2rem;min-height:66px}

.identity{display:flex;align-items:center;gap:.7rem;text-decoration:none;flex:none}
.mark{
  display:grid;place-items:center;width:28px;height:28px;
  border:1px solid var(--ink);border-radius:3px;
  font-family:var(--mono);font-size:10px;font-weight:500;letter-spacing:.08em;
  color:var(--ink);
}
.identity-text{display:flex;flex-direction:column;line-height:1.25}
.identity-name{font-size:14.5px;font-weight:600;letter-spacing:-.01em}
.identity-role{
  font-family:var(--mono);font-size:9.5px;letter-spacing:.11em;
  text-transform:uppercase;color:var(--muted);
}

.nav-links{display:flex;align-items:center;gap:1.8rem;margin-left:auto}
.nav-links a{
  position:relative;text-decoration:none;
  font-size:13.5px;font-weight:500;color:var(--muted);
  padding:.25rem 0;transition:color .18s;
}
.nav-links a::after{
  content:'';position:absolute;left:0;right:0;bottom:-2px;height:1px;
  background:var(--copper);transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--ink)}
.nav-links a.active::after{transform:scaleX(1)}

.menu-btn{
  display:none;align-items:center;gap:.55rem;
  padding:.4rem .55rem;border:1px solid var(--rule);border-radius:3px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--muted);
  transition:border-color .18s,color .18s;
}
.menu-btn:hover{border-color:var(--ink);color:var(--ink)}
.menu-btn-bars{display:grid;gap:4px;width:16px}
.menu-btn-bars i{display:block;height:1px;background:currentColor;transition:transform .18s,opacity .18s}
.menu-btn[aria-expanded="true"] .menu-btn-bars i:first-child{transform:translateY(2.5px) rotate(45deg)}
.menu-btn[aria-expanded="true"] .menu-btn-bars i:last-child{transform:translateY(-2.5px) rotate(-45deg)}

.mobile-menu{
  display:none;position:absolute;left:0;right:0;top:100%;
  background:var(--paper);border-bottom:1px solid var(--rule-strong);
  padding:.5rem var(--gutter) 1.1rem;
}
.mobile-menu.open{display:block}
.mobile-menu nav{display:grid}
.mobile-menu a{
  text-decoration:none;font-size:16px;color:var(--ink-soft);
  padding:.65rem 0;border-bottom:1px solid var(--rule);
}
.mobile-menu a:hover{color:var(--copper)}
.mobile-mail{
  display:inline-block;margin-top:.9rem;
  font-family:var(--mono);font-size:12px;color:var(--muted);
  border-bottom:0!important;padding:.2rem 0!important;
}

/* ---------- hero ---------- */
.hero{padding-block:clamp(2.75rem,6vw,4.75rem)}
.hero-grid{
  display:grid;grid-template-columns:minmax(0,1.18fr) minmax(300px,.82fr);
  gap:clamp(2.5rem,6vw,5rem);align-items:start;
}
.hero-main h1{
  font-family:var(--serif);font-weight:600;
  font-size:clamp(2.1rem,4.6vw,3.6rem);
  line-height:1.07;letter-spacing:-.028em;
  margin:1.1rem 0 1.2rem;
}
.hero-main h1 .accent{color:var(--copper)}
.hero-lede{max-width:56ch;color:var(--ink-soft);font-size:17px;line-height:1.62}
.hero-actions{display:flex;align-items:center;flex-wrap:wrap;gap:1.4rem;margin-top:2rem}

.record{border-top:1px solid var(--ink);padding-top:.7rem}
.record-label{
  font-family:var(--mono);font-size:10px;font-weight:500;
  letter-spacing:.16em;text-transform:uppercase;color:var(--steel);
  margin-bottom:.35rem;
}
.record dl{display:grid}
.record dl>div{
  display:grid;grid-template-columns:78px minmax(0,1fr);gap:.75rem;
  padding:.55rem 0;border-bottom:1px solid var(--rule);
}
.record dt{
  font-family:var(--mono);font-size:9.5px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--muted);padding-top:.22rem;
}
.record dd{font-size:13.5px;line-height:1.5;color:var(--ink-soft)}

/* ---------- sections ---------- */
.section{padding-block:clamp(3.5rem,7vw,5.75rem);border-top:1px solid var(--rule)}
.section:first-of-type{border-top:none}

/* ---------- case studies ---------- */
.case{border-top:1px solid var(--rule);padding-block:clamp(2.1rem,4.5vw,3.25rem)}
.case:first-of-type{border-top-color:var(--ink)}
.case-meta{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:.55rem;
  font-family:var(--mono);font-size:11px;letter-spacing:.02em;color:var(--muted);
}
.case-meta [aria-hidden]{color:var(--rule-strong)}
.case-no{color:var(--copper);letter-spacing:.08em}
.case h3{
  font-family:var(--serif);font-weight:600;
  font-size:clamp(1.5rem,2.6vw,2rem);
  line-height:1.15;letter-spacing:-.02em;
  margin:.55rem 0 .7rem;
}
.case-lede{max-width:66ch;color:var(--ink-soft);font-size:16.5px}

.case-split{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,420px);
  gap:clamp(2rem,4.5vw,3.75rem);
  margin-top:1.75rem;align-items:start;
}
.case-text{display:flex;flex-direction:column;gap:1.5rem}
.case-pair{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem}
.case h4{
  font-family:var(--mono);font-size:10px;font-weight:500;
  letter-spacing:.15em;text-transform:uppercase;color:var(--copper);
  margin-bottom:.4rem;
}
.case-pair p,.case-three p{font-size:15px;line-height:1.6;color:var(--muted)}

.outcome{
  border-left:2px solid var(--copper);padding-left:1rem;
  font-size:15.5px;color:var(--ink-soft);
}
.outcome span{
  display:block;font-family:var(--mono);font-size:10px;font-weight:500;
  letter-spacing:.15em;text-transform:uppercase;color:var(--copper);
  margin-bottom:.25rem;
}

.case--arch .case-split{grid-template-columns:minmax(0,1.55fr) minmax(0,1fr)}
.case--wide .case-split{grid-template-columns:1fr}
.case-three{
  display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(1.5rem,3vw,2.5rem);
  margin-top:1.75rem;padding-top:1.5rem;border-top:1px solid var(--rule);
}

/* figures */
.fig{margin:0;border:1px solid var(--rule);border-radius:4px;background:#FBF9F4;padding:1rem 1rem .8rem}
.fig--wide{margin-top:1.75rem}
.fig figcaption{
  margin-top:.7rem;padding-top:.6rem;border-top:1px solid var(--rule);
  font-family:var(--mono);font-size:11px;line-height:1.55;color:var(--muted);
}
.fig-mobile{display:none}
.fig-mobile li{
  position:relative;padding-left:1rem;font-family:var(--mono);
  font-size:11.5px;line-height:1.7;color:var(--ink-soft);
}
.fig-mobile li::before{content:'';position:absolute;left:0;top:.95em;width:6px;height:1px;background:var(--copper)}

.diagram{display:block;width:100%;height:auto}
.diagram text{font-family:var(--mono)}
.diagram-label{font-size:13px;fill:var(--ink-soft)}
.diagram-small{font-size:11px;fill:var(--muted)}
.diagram-note{font-size:10.5px;letter-spacing:.1em;fill:var(--copper)}
.node{fill:var(--paper);stroke:var(--rule-strong);stroke-width:1}
.node-key{stroke:var(--steel);stroke-width:1.4}
.wire{fill:none;stroke:var(--rule-strong);stroke-width:1}
.wire--dash{stroke-dasharray:4 4}
.arrow{fill:var(--rule-strong)}

/* method ledger (case 02) */
.method{border-top:1px solid var(--ink);padding-top:.8rem}
.method-label{
  font-family:var(--mono);font-size:10px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--steel);margin-bottom:.7rem;
}
.steps{display:grid;gap:.55rem}
.steps li{display:grid;grid-template-columns:24px 1fr;gap:.6rem;font-size:14px;line-height:1.5;color:var(--ink-soft)}
.steps li span{font-family:var(--mono);font-size:10.5px;color:var(--copper);padding-top:.15rem}
.spend{margin-top:1.1rem;padding-top:.9rem;border-top:1px solid var(--rule);position:relative}
.spend-row{display:grid;grid-template-columns:48px 1fr 28px;align-items:center;gap:.6rem;padding:.2rem 0}
.spend-key{font-family:var(--mono);font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.bar{position:relative;height:10px;background:var(--paper-3);border:1px solid var(--rule)}
.bar-fill{display:block;height:100%;background:var(--ink-soft)}
.bar-fill--cut{background:var(--copper)}
.spend-val{font-family:var(--mono);font-size:10.5px;color:var(--muted);text-align:right}
.bar-delta{
  position:absolute;right:4px;top:50%;transform:translateY(-50%);
  font-family:var(--mono);font-size:8.5px;letter-spacing:.02em;color:var(--copper);
}
.method-note{margin-top:1rem;font-family:var(--mono);font-size:10px;line-height:1.55;color:var(--muted)}

/* ---------- results ---------- */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--ink);border-bottom:1px solid var(--ink);
}
.metric{padding:1.4rem 1.25rem 1.3rem;border-left:1px solid var(--rule)}
.metric:first-child{border-left:none;padding-left:0}
.metric-value{
  font-family:var(--serif);font-weight:600;
  font-size:clamp(2rem,3.2vw,2.6rem);line-height:1;letter-spacing:-.02em;
}
.metric-label{margin-top:.55rem;font-size:13.5px;line-height:1.45;color:var(--muted)}
.metric-link{
  display:inline-block;margin-top:.7rem;
  font-family:var(--mono);font-size:10px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--copper);text-decoration:none;
  border-bottom:1px solid transparent;transition:border-color .18s;
}
.metric-link:hover{border-color:var(--copper)}
.metrics-note{margin-top:1rem;font-family:var(--mono);font-size:10.5px;line-height:1.6;color:var(--muted)}

/* ---------- experience ---------- */
.jobs{border-top:1px solid var(--ink)}
.job{
  display:grid;grid-template-columns:170px minmax(0,1fr);gap:2rem;
  padding:1.6rem 0;border-bottom:1px solid var(--rule);
}
.job-when{display:flex;flex-direction:column;gap:.15rem;font-family:var(--mono);font-size:11px;line-height:1.6;color:var(--muted)}
.job-body h3{font-family:var(--sans);font-size:1.1rem;font-weight:600;letter-spacing:-.01em;line-height:1.35}
.job-org{color:var(--copper);font-weight:500}
.job-sub{margin-top:.15rem;font-family:var(--mono);font-size:10.5px;letter-spacing:.05em;color:var(--muted)}
.ticks{margin-top:.6rem;display:grid;gap:.35rem;max-width:64ch}
.ticks li{position:relative;padding-left:1rem;font-size:15px;line-height:1.6;color:var(--muted)}
.ticks li::before{content:'';position:absolute;left:0;top:.85em;width:6px;height:1px;background:var(--copper)}

/* ---------- skills ---------- */
.index{border-top:1px solid var(--ink)}
.index-row{
  display:grid;grid-template-columns:210px minmax(0,1fr);gap:2rem;
  padding:.95rem 0;border-bottom:1px solid var(--rule);
}
.index-row dt{
  font-family:var(--mono);font-size:10.5px;font-weight:500;
  letter-spacing:.13em;text-transform:uppercase;color:var(--steel);
  padding-top:.25rem;
}
.index-row dd{font-size:15.5px;line-height:1.55;color:var(--ink-soft)}

.creds{
  display:grid;grid-template-columns:210px minmax(0,1fr);gap:2rem;
  margin-top:2.5rem;padding-top:1.5rem;border-top:1px solid var(--rule);
}
.creds-label{
  font-family:var(--mono);font-size:10.5px;font-weight:500;
  letter-spacing:.13em;text-transform:uppercase;color:var(--steel);
}
.cred-list{display:grid;gap:.4rem}
.cred-list li{font-size:15px;color:var(--ink-soft)}
.cred-verify{margin-top:.75rem}
.cred-verify a{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--copper);text-decoration:none;
  border-bottom:1px solid transparent;transition:border-color .18s;
}
.cred-verify a:hover{border-color:var(--copper)}
.edu{margin-top:1rem;font-size:13.5px;color:var(--muted)}

/* ---------- terminal ---------- */
.terminal-band{
  background:var(--night);color:var(--night-text);
  padding-block:clamp(3rem,6.5vw,4.75rem);
  border-top:1px solid var(--night-rule);
}
.term-layout{
  display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);
  gap:clamp(2rem,5vw,4rem);align-items:start;
}
.term-intro h2{
  font-family:var(--serif);font-weight:600;color:#F2EEE4;
  font-size:clamp(1.8rem,3vw,2.4rem);line-height:1.15;letter-spacing:-.02em;
  margin:.7rem 0 .9rem;
}
.term-copy{max-width:44ch;color:var(--night-muted);font-size:15px;line-height:1.65}
.term-copy code{
  font-family:var(--mono);font-size:.88em;color:#D8C9B4;
  background:#23282E;padding:.08em .35em;border-radius:3px;
}
.term-keys{display:grid;gap:.4rem;margin-top:1.6rem;max-width:26rem}
.term-keys>div{display:grid;grid-template-columns:88px 1fr;gap:.75rem}
.term-keys dt{font-family:var(--mono);font-size:10.5px;color:#8FBFD4}
.term-keys dd{font-size:13px;color:var(--night-muted)}

.term{
  background:var(--night-2);border:1px solid var(--night-rule);border-radius:4px;
  overflow:hidden;transition:border-color .2s;
}
.term:focus-within{border-color:#4A5560}
.term.full{position:fixed;inset:1rem;z-index:200;display:flex;flex-direction:column;border-color:#4A5560}
.term-bar{
  display:flex;align-items:center;gap:.75rem;
  background:#171A1D;border-bottom:1px solid var(--night-rule);
  padding:.5rem .7rem;
}
.term-title{
  margin-right:auto;font-family:var(--mono);font-size:11px;
  letter-spacing:.02em;color:#9AA1A8;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.term-actions{display:flex;gap:.15rem;flex:none}
.term-actions button{
  display:grid;place-items:center;width:30px;height:30px;
  border-radius:3px;color:#9AA1A8;
  transition:background-color .18s,color .18s;
}
.term-actions button:hover{background:var(--night-3);color:#F2EEE4}
.term-actions .ico{width:14px;height:14px}
.ico{width:18px;height:18px;vertical-align:-.2em;flex:none}

.term-body{
  background:var(--night-2);color:var(--night-text);
  font-family:var(--mono);font-size:13px;line-height:1.7;
  padding:.9rem 1rem;min-height:300px;max-height:360px;
  overflow-y:auto;cursor:text;
}
.term.full .term-body{flex:1;min-height:0;max-height:none}
.term-body::-webkit-scrollbar{width:8px}
.term-body::-webkit-scrollbar-thumb{background:#3A4149;border-radius:4px}
.term-body::-webkit-scrollbar-track{background:transparent}
.term-line{display:flex;align-items:center;gap:.55rem;margin-top:.35rem}
.ps1{color:#8FBFD4;white-space:nowrap}
.term-in{
  flex:1;min-width:0;background:transparent;border:none;outline:none;
  color:#fff;font:inherit;font-size:16px;caret-color:#8FBFD4;
}
.t-out{margin:.1rem 0;white-space:pre-wrap;word-break:break-word}
.t-out.dim{color:#9AA1A8}
.t-out.green{color:#8FD3A8}
.t-out.cyan{color:#8FBFD4}
.t-out.err{color:#E0927F}
.t-out a{color:#8FBFD4}
.term-hint{
  display:flex;align-items:center;flex-wrap:wrap;gap:.4rem;
  background:#171A1D;border-top:1px solid var(--night-rule);
  padding:.6rem .7rem;
  font-family:var(--mono);font-size:10.5px;color:#9AA1A8;
}
.term-hint button{
  background:var(--night-3);color:#C9CED4;border:1px solid var(--night-rule);
  border-radius:3px;padding:.18rem .5rem;
  font-family:var(--mono);font-size:10.5px;
  transition:border-color .18s,color .18s;
}
.term-hint button:hover{border-color:#5A6570;color:#F2EEE4}
.term-hint button:active{transform:translateY(1px)}

/* ---------- contact ---------- */
.contact-grid{
  display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);
  gap:clamp(2rem,6vw,5rem);align-items:start;
}
.contact-intro h2{
  font-family:var(--serif);font-weight:600;
  font-size:clamp(1.9rem,3.4vw,2.7rem);
  line-height:1.12;letter-spacing:-.025em;
  margin:.7rem 0 .9rem;max-width:16ch;
}
.contact-copy{max-width:46ch;color:var(--muted);font-size:16px}
.contact-intro .btn{margin-top:1.6rem}

.contact-list{border-top:1px solid var(--ink)}
.contact-row{
  display:grid;grid-template-columns:92px minmax(0,1fr);gap:1rem;
  align-items:baseline;padding:.8rem 0;border-bottom:1px solid var(--rule);
  text-decoration:none;
}
.contact-label{
  font-family:var(--mono);font-size:9.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--muted);
}
.contact-value{display:flex;align-items:baseline;flex-wrap:wrap;gap:.6rem;font-size:15px;color:var(--ink-soft);min-width:0}
.contact-value a{
  color:var(--ink);text-decoration:underline;
  text-decoration-thickness:1px;text-underline-offset:3px;
  overflow-wrap:anywhere;transition:color .18s;
}
.contact-value a:hover{color:var(--copper)}
.contact-row--link{cursor:pointer}
.contact-row--link .contact-value{color:var(--ink)}
.contact-row--link:hover .contact-value,
.contact-row--link:hover .row-arrow{color:var(--copper)}
.row-arrow{color:var(--muted);transition:transform .18s,color .18s}
.contact-row--link:hover .row-arrow{transform:translateX(3px)}

.copy-btn{
  font-family:var(--mono);font-size:9px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--muted);border:1px solid var(--rule);border-radius:2px;
  padding:.12rem .35rem;transition:border-color .18s,color .18s;
}
.copy-btn:hover{border-color:var(--ink);color:var(--ink)}

/* ---------- footer ---------- */
.footer{border-top:1px solid var(--rule)}
.foot-main{
  display:grid;grid-template-columns:1.5fr .75fr .75fr;gap:2rem;
  padding-block:2.5rem 2rem;
}
.foot-name{font-family:var(--serif);font-weight:600;font-size:1.15rem;letter-spacing:-.01em}
.foot-role{margin-top:.2rem;font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;color:var(--muted)}
.foot-note{margin-top:.9rem;max-width:30ch;font-size:12.5px;line-height:1.6;color:var(--muted)}
.foot-h{
  font-family:var(--mono);font-size:9.5px;font-weight:500;
  letter-spacing:.15em;text-transform:uppercase;color:var(--muted);
  margin-bottom:.65rem;
}
.foot-col ul{display:grid;gap:.3rem}
.foot-col a{font-size:13.5px;color:var(--ink-soft);text-decoration:none;transition:color .18s}
.foot-col a:hover{color:var(--copper);text-decoration:underline;text-underline-offset:3px}
.foot-bottom{
  display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;
  border-top:1px solid var(--rule);padding-block:1rem 1.4rem;
  font-family:var(--mono);font-size:10.5px;color:var(--muted);
}
.foot-bottom a{text-decoration:none;color:var(--muted);border-bottom:1px solid transparent}
.foot-bottom a:hover{color:var(--ink);border-color:var(--rule-strong)}

/* ---------- floating controls ---------- */
.to-top{
  position:fixed;right:1.2rem;bottom:1.2rem;z-index:60;
  display:grid;place-items:center;width:44px;height:44px;
  background:var(--paper);color:var(--ink);
  border:1px solid var(--ink);border-radius:3px;font-size:16px;
  opacity:0;visibility:hidden;pointer-events:none;transform:translateY(8px);
  transition:opacity .2s,transform .2s,visibility 0s linear .2s,background-color .18s,color .18s;
}
.to-top.show{opacity:1;visibility:visible;pointer-events:auto;transform:none;transition:opacity .2s,transform .2s,background-color .18s,color .18s}
.to-top:hover{background:var(--ink);color:var(--paper)}

.toast{
  position:fixed;left:50%;bottom:1.4rem;z-index:300;
  transform:translate(-50%,12px);
  background:var(--ink);color:var(--paper);
  padding:.5rem .95rem;border-radius:3px;
  font-family:var(--mono);font-size:11.5px;
  opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- 404 ---------- */
.notfound{padding:clamp(4rem,12vh,8rem) 1.5rem;text-align:center}
.notfound h1{font-family:var(--serif);font-size:clamp(3rem,14vw,6.5rem);line-height:1;letter-spacing:-.03em}
.notfound-sub{color:var(--muted);max-width:34rem;margin:1rem auto 2rem}
.notfound-links{margin-top:1.5rem;font-size:13.5px}
.notfound-links a{color:var(--muted);text-decoration:underline;text-underline-offset:3px}
.notfound-links a:hover{color:var(--copper)}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .identity-role{display:none}
  .case-split{grid-template-columns:minmax(0,1fr) minmax(280px,380px)}
}

@media (max-width:960px){
  .hero-grid{grid-template-columns:1fr;gap:2.5rem}
  .record{max-width:34rem}
  .case-split,.case--arch .case-split{grid-template-columns:1fr;gap:1.75rem}
  .case-three{grid-template-columns:1fr;gap:1.25rem}
  .term-layout{grid-template-columns:1fr;gap:2rem}
  .term-copy{max-width:56ch}
  .term-keys{max-width:32rem}
  .contact-grid{grid-template-columns:1fr;gap:2.5rem}
  .contact-copy{max-width:56ch}
  .metrics{grid-template-columns:1fr 1fr}
  .metric{padding:1.25rem 1.15rem}
  .metric:nth-child(odd){border-left:none;padding-left:0}
  .metric:nth-child(n+3){border-top:1px solid var(--rule)}
  .foot-main{grid-template-columns:1fr 1fr;gap:1.75rem}
  .foot-id{grid-column:1/-1}
}

@media (max-width:900px){
  .nav-links{display:none}
  .menu-btn{display:inline-flex}
  html{scroll-padding-top:76px}
}

@media (max-width:720px){
  body{font-size:16.5px}
  .job{grid-template-columns:1fr;gap:.55rem}
  .job-when{flex-direction:row;gap:.9rem;flex-wrap:wrap}
  .index-row,.creds{grid-template-columns:1fr;gap:.35rem}
  .index-row dt,.creds-label{padding-top:0}
  .case-pair{grid-template-columns:1fr;gap:1.1rem}
  .fig-desktop{display:none}
  .fig-mobile{display:grid;gap:.4rem}
  .fig{padding:.9rem .9rem .7rem}
  .fig--wide{margin-top:1.4rem}
}

@media (max-width:600px){
  .head-inner{min-height:60px}
  .identity-name{font-size:13.5px}
  .hero{padding-block:2.25rem 2.75rem}
  .hero-actions{gap:1rem}
  .hero-actions .btn{flex:1 1 auto}
  .record dl>div{grid-template-columns:70px minmax(0,1fr)}
  .case{padding-block:1.9rem}
  .case-three{padding-top:1.25rem}
  .metrics{grid-template-columns:1fr}
  .metric{border-left:none;padding-left:0}
  .metric+.metric{border-top:1px solid var(--rule);padding-top:1.15rem}
  .foot-main{grid-template-columns:1fr;gap:1.5rem}
  .term-body{min-height:260px;max-height:320px;padding:.8rem;font-size:12.5px}
  .term.full{inset:.5rem}
  .contact-row{grid-template-columns:84px minmax(0,1fr);gap:.75rem}
  .to-top{right:.9rem;bottom:.9rem}
}

@media (max-width:380px){
  :root{--gutter:1.1rem}
  .hero-main h1{font-size:1.95rem}
  .menu-btn-label{display:none}
  .mark{width:26px;height:26px}
  .record dl>div{grid-template-columns:64px minmax(0,1fr);gap:.6rem}
}

/* ---------- motion + contrast preferences ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001s!important;animation-iteration-count:1!important;transition-duration:.001s!important}
  html{scroll-behavior:auto}
}

@media (prefers-contrast:more){
  :root{--muted:#3F3B34;--rule:#B4AC9C;--rule-strong:#8C8474}
  .term-copy,.term-keys dd{color:#D5D9DD}
}

/* ---------- print ---------- */
@media print{
  body{background:#fff;color:#000;font-size:11pt}
  body::after,.progress,.site-head,.to-top,.toast,.terminal-band,.fig-mobile{display:none}
  .wrap{width:100%}
  .section,.hero{padding-block:1.25rem;border-top:1px solid #999}
  .case{break-inside:avoid;border-top-color:#999}
  .case-split{grid-template-columns:1fr 1fr;gap:1.5rem}
  .fig-desktop{display:block}
  .diagram .node{fill:#fff;stroke:#666}
  .diagram text{fill:#000}
  .metric-value,.case h3,.hero h1{color:#000}
  a[href^="http"]::after{content:" (" attr(href) ")";font-size:9pt;color:#444}
  .contact-value a::after,.foot-col a::after{content:""}
  .contact-value a[href^="mailto"]::after{content:" (" attr(href) ")";font-size:9pt}
  p{orphans:3;widows:3}
}