:root{--bg:#0A0E14;--bg2:#0F151D;--surface:#121A24;--line:#223042;--text:#E6EBF2;--muted:#8C99AB;--gold:#E2B13C;--gold-ink:#1A1405;
--mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;--head:"Space Grotesk",system-ui,sans-serif;--body:"Inter",system-ui,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:70px}
body{margin:0;background:var(--bg);color:var(--text);font:400 16px/1.65 var(--body);-webkit-font-smoothing:antialiased}
a{color:inherit}.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
/* nav */
.site-nav{position:sticky;top:0;z-index:20;background:rgba(10,14,20,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:1080px;margin:0 auto;padding:0 24px;height:58px;display:flex;align-items:center;justify-content:space-between}
.nav-brand{display:flex;align-items:center;gap:10px;font:600 1rem var(--mono);text-decoration:none;letter-spacing:.04em}
.dot{width:9px;height:9px;border-radius:50%;background:var(--gold)}
.nav-links{display:flex;gap:26px;list-style:none;margin:0;padding:0}
.nav-links a{color:var(--muted);text-decoration:none;font-size:.95rem;font-weight:500}.nav-links a:hover,.nav-links a[aria-current]{color:var(--text)}
.nav-links a.app-link{color:var(--gold)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);color:var(--text);border-radius:6px;font-size:1.2rem;padding:4px 10px;cursor:pointer}
@media(max-width:760px){.nav-toggle{display:block}.nav-links{display:none;position:absolute;top:58px;left:0;right:0;flex-direction:column;gap:0;background:var(--bg2);border-bottom:1px solid var(--line)}
.nav-links.open{display:flex}.nav-links a{display:block;padding:14px 24px}}
/* type */
.cmd-tag{display:inline-block;font:500 .8rem var(--mono);color:var(--gold);background:var(--bg2);border:1px solid var(--line);border-radius:4px;padding:4px 12px;margin-bottom:18px}
h1,h2,h3{font-family:var(--head);margin:0;line-height:1.1;letter-spacing:-.02em}
.hero{padding:96px 0 72px;border-bottom:1px solid var(--line);background:radial-gradient(900px 400px at 85% -10%,rgba(226,177,60,.09),transparent)}
.hero-title{font-size:clamp(2.4rem,6.5vw,4.6rem);font-weight:700}.accent{color:var(--gold)}
.hero-sub{max-width:40rem;color:var(--muted);font-size:1.1rem;margin:22px 0 0}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 22px;border-radius:7px;font-weight:600;text-decoration:none;border:1px solid transparent}
.btn-gold{background:var(--gold);color:var(--gold-ink)}.btn-gold:hover{filter:brightness(1.08)}
.btn-outline{border-color:var(--line);color:var(--text)}.btn-outline:hover{border-color:var(--gold);color:var(--gold)}
.arch-strip{display:flex;align-items:center;flex-wrap:wrap;gap:0;margin-top:56px}
.arch-node{font:500 .85rem var(--mono);background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:9px 14px}
.arch-connector{width:28px;height:1px;background:var(--gold);opacity:.6}
@media(max-width:760px){.arch-strip{gap:8px}.arch-connector{display:none}}
section{padding:76px 0 8px}section:last-of-type{padding-bottom:76px}
.section-title{font-size:clamp(1.7rem,4vw,2.5rem);font-weight:700}
.about-text{max-width:46rem;color:var(--muted);font-size:1.07rem}
.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-top:34px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:20px}
.stat-num{font:700 2.3rem var(--head);color:var(--gold)}.stat-label{color:var(--muted);font-size:.92rem}
.skills-grid{display:flex;flex-wrap:wrap;gap:10px}
.skill-chip{border:1px solid var(--line);background:var(--surface);border-radius:99px;padding:6px 16px;font-size:.93rem}
.timeline{border-left:1px solid var(--line);margin-left:6px}
.tl-item{position:relative;padding:0 0 34px 28px}.tl-item::before{content:"";position:absolute;left:-5px;top:8px;width:9px;height:9px;border-radius:50%;background:var(--gold)}
.tl-role{font:600 1.15rem var(--head)}.tl-meta{font:400 .78rem var(--mono);color:var(--gold);margin:4px 0 8px;letter-spacing:.03em}
.tl-desc{margin:0;color:var(--muted);max-width:44rem}
/* cards */
.course-grid,.app-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;margin-top:30px}
.course-card,.app-card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:24px;display:flex;flex-direction:column;gap:10px}
.course-card:hover,.app-card:hover{border-color:rgba(226,177,60,.5)}
.course-level,.app-tag{font:500 .75rem var(--mono);color:var(--gold)}
.course-title,.app-title{font:600 1.25rem var(--head)}
.course-desc,.app-desc{color:var(--muted);margin:0;flex:1}.courses-note{max-width:42rem;color:var(--muted)}
.course-cta{color:var(--gold);text-decoration:none;font-weight:600}
.app-card.big{grid-column:1/-1;display:grid;grid-template-columns:1.3fr 1fr;gap:28px}
@media(max-width:760px){.app-card.big{grid-template-columns:1fr}}
.app-list{margin:0;padding-left:18px;color:var(--muted)}.app-list li{margin:6px 0}
.app-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px}.note{font-size:.88rem;color:var(--muted)}
.contact-box{display:flex;flex-wrap:wrap;gap:28px;align-items:center;justify-content:space-between;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:28px}
.contact-link{text-decoration:none;display:block}.contact-link .label{font:500 .75rem var(--mono);color:var(--gold)}.contact-link .value{font:600 1.4rem var(--head)}
footer{border-top:1px solid var(--line);padding:24px 0;color:var(--muted);font-size:.9rem}