/* John Burcheci personal portfolio — responsive and dependency-free */
:root { color-scheme: dark; --bg:#0b1019; --panel:#121a26; --panel2:#162030; --line:#253041; --txt:#f5f7fa; --muted:#b1bbca; --lime:#adf09e; --teal:#8ddbd5; --blue:#bdd0ff; }
* { box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { margin:0; color:var(--txt); background:var(--bg); font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Arial,sans-serif; line-height:1.58; }
a { color:inherit; }
a:focus-visible {outline:3px solid var(--lime);outline-offset:4px;border-radius:3px;}
.sr {position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
.container{width:min(1120px,calc(100% - 44px));margin:auto;}
.nav{position:sticky;top:0;z-index:20;background:rgba(11,16,25,.93);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);}
.nav-inner{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px;}
.brand{font-weight:850;letter-spacing:-.03em;text-decoration:none;font-size:20px;}
.brand b{color:var(--lime);}
.nav-links{display:flex;gap:26px;align-items:center;}
.nav-links a{font-size:13px;text-decoration:none;color:var(--muted);font-weight:700;}
.nav-links a:hover{color:#fff;}
.hero {padding:106px 0 96px;position:relative;overflow:hidden;background:radial-gradient(ellipse 60% 62% at 82% 24%,#183d39 0%,transparent 70%),radial-gradient(ellipse 60% 70% at 15% 80%,#1b223f 0%,transparent 65%);}
.eyebrow{font-weight:800;text-transform:uppercase;letter-spacing:.16em;color:var(--lime);font-size:12px;}
h1{font-size:clamp(46px,7.4vw,93px);letter-spacing:-.073em;line-height:1.055;max-width:980px;margin:20px 0 25px;}
h1 em{font-style:normal;color:var(--lime);}
.hero-desc{max-width:730px;font-size:clamp(17px,2.1vw,21px);line-height:1.65;color:var(--muted);margin:0 0 31px;}
.actions{display:flex;flex-wrap:wrap;gap:12px;}
.btn{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;border:1px solid var(--line);border-radius:12px;padding:12px 19px;font-size:14px;font-weight:800;min-height:47px;transition:transform .14s,border-color .14s;}
.btn:hover{transform:translateY(-2px);border-color:var(--lime);}
.btn.primary{color:#0a1715;background:var(--lime);border-color:var(--lime);}
.pills{display:flex;flex-wrap:wrap;gap:9px;margin-top:35px;}
.pills span{color:#cad4db;font-weight:650;font-size:12px;border:1px solid #2d3a49;background:#16212a;border-radius:100px;padding:7px 13px;}
section{padding:78px 0;}
.section-top{display:flex;justify-content:space-between;align-items:end;gap:18px;margin-bottom:31px;}
h2{letter-spacing:-.05em;font-size:clamp(29px,4vw,43px);line-height:1.13;margin:10px 0 0;}
.section-intro{max-width:490px;color:var(--muted);font-size:15px;margin:0;}
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:18px;}
.project{grid-column:span 6;background:var(--panel);border:1px solid var(--line);border-radius:20px;overflow:hidden;display:flex;flex-direction:column;min-width:0;}
.project.featured{grid-column:span 12;display:grid;grid-template-columns:1.06fr .94fr;}
.project-content{padding:28px;}
.tag{display:inline-block;font-size:11px;font-weight:850;letter-spacing:.11em;text-transform:uppercase;color:var(--teal);margin-bottom:11px;}
h3{font-size:25px;line-height:1.2;letter-spacing:-.037em;margin:2px 0 12px;}
.project p{color:var(--muted);font-size:14px;margin:0 0 14px;}
.project ul{padding-left:20px;color:#cbd4df;font-size:13px;line-height:1.75;margin:0;}
.project a.external{display:inline-block;color:var(--lime);font-weight:800;font-size:13px;margin-top:17px;text-underline-offset:5px;}
.arch{background:linear-gradient(145deg,#152d2d,#172236);padding:30px;display:flex;flex-direction:column;justify-content:center;gap:14px;}
.arch .node{border:1px solid #507269;background:#142a2b;border-radius:12px;color:#ddf8e4;text-align:center;padding:12px 10px;font-size:13px;font-weight:750;}
.arch .node.wide{background:#223b3a;}
.arch .connector{text-align:center;color:var(--lime);font-size:20px;line-height:1;}
.arch .node-line{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;}
.arch .node-line .node{font-size:11px;}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin-top:22px;}
.stat{padding:22px;background:var(--panel2);border:1px solid var(--line);border-radius:14px;}
.stat strong{display:block;font-size:33px;color:var(--lime);letter-spacing:-.06em;}
.stat span{color:var(--muted);font-size:13px;}
.band{background:#101a25;border-block:1px solid var(--line);}
.columns{display:grid;grid-template-columns:1fr 1fr;gap:35px;}
.copy{color:var(--muted);line-height:1.75;}
.skills{display:flex;flex-wrap:wrap;gap:9px;}
.skills span{font-size:13px;border:1px solid #344054;background:#192333;padding:8px 13px;border-radius:8px;color:#d7dfeb;}
.book{border:1px solid var(--line);border-radius:14px;padding:21px;background:var(--panel);margin-top:12px;}
.book b{display:block;font-size:16px;}
.book span{font-size:12px;color:var(--muted);}
.cta{margin:0 auto 55px;padding:45px 35px;border-radius:20px;border:1px solid #416357;background:linear-gradient(110deg,#18372f,#19253a);}
.cta h2{margin:0 0 12px;}
.cta p{color:#d3e0db;max-width:620px;}
footer{padding:24px 0 45px;color:#8b98aa;font-size:12px;border-top:1px solid var(--line);}
@media(max-width:800px){.nav-inner{min-height:60px}.nav-links{gap:13px}.nav-links a{font-size:12px}.hero{padding:72px 0}.project,.project.featured{grid-column:span 12}.project.featured{display:flex;flex-direction:column}.arch{order:2}.section-top{display:block}.section-intro{margin-top:15px}.stats{grid-template-columns:1fr}.columns{grid-template-columns:1fr}section{padding:58px 0}.cta{padding:28px}}
@media(max-width:450px){.nav-links a:nth-child(2){display:none}.nav-links{gap:10px}.container{width:calc(100% - 32px)}h1{font-size:45px}.project-content{padding:22px}.arch{padding:19px}.arch .node-line .node{font-size:9.5px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.btn{transition:none}}

section[id]{scroll-margin-top:84px;}