*{margin:0;padding:0;box-sizing:border-box}
:root{--bg:#0d1117;--surface:#161b22;--surface-2:#1c232e;--text:#e6edf3;--muted:#7d8590;--accent:#4493f8;--accent-2:#3fb950;--border:#30363d}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.65}
a{color:inherit;text-decoration:none}
header{position:sticky;top:0;background:rgba(13,17,23,.88);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);z-index:50;padding:1rem 5%;display:flex;justify-content:space-between;align-items:center}
.logo{font-size:1.25rem;font-weight:800;letter-spacing:-.4px}
.logo span{color:var(--accent)}
nav{display:flex;gap:.4rem;flex-wrap:wrap}
nav a{padding:.45rem .85rem;border-radius:6px;font-size:.88rem;color:var(--muted);transition:color .2s,background .2s}
nav a:hover{color:var(--text);background:var(--surface-2)}
nav a.active{color:var(--text);background:var(--surface-2)}
.btn{display:inline-block;padding:.65rem 1.4rem;border-radius:6px;font-size:.88rem;font-weight:600;transition:transform .2s,box-shadow .2s}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(68,147,248,.3)}
.btn-ghost{border:1px solid var(--border);color:var(--text)}
.btn-ghost:hover{border-color:var(--accent)}
.hero{padding:6rem 5% 4rem;max-width:1100px;margin:0 auto;text-align:center}
.hero .eyebrow{font-size:.78rem;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);background:rgba(68,147,248,.12);padding:.4rem 1rem;border-radius:99px;margin-bottom:1.5rem;display:inline-block}
.hero h1{font-size:clamp(2rem,5vw,3.4rem);font-weight:800;letter-spacing:-1px;margin-bottom:1.25rem;line-height:1.1}
.hero p{color:var(--muted);max-width:600px;margin:0 auto 2rem}
.flip-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.25rem;max-width:1100px;margin:3rem auto;padding:0 5%}
.flip{perspective:1000px;height:180px;animation:floatCard 6s ease-in-out infinite}
.flip:nth-child(2n){animation-delay:-1.5s}
.flip:nth-child(3n){animation-delay:-3s}
.flip:nth-child(4n){animation-delay:-4.5s}
@keyframes floatCard{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
.flip-inner{position:relative;width:100%;height:100%;transition:transform .7s cubic-bezier(.4,.2,.2,1);transform-style:preserve-3d}
.flip:hover .flip-inner{transform:rotateY(180deg)}
.flip-front,.flip-back{position:absolute;inset:0;backface-visibility:hidden;border-radius:12px;padding:1.5rem;display:flex;flex-direction:column;justify-content:center;border:1px solid var(--border)}
.flip-front{background:var(--surface)}
.flip-back{background:var(--accent);color:#fff;transform:rotateY(180deg)}
.flip-front h3{font-size:1.1rem;margin-bottom:.4rem}
.flip-front p{color:var(--muted);font-size:.85rem}
.flip-back h3{font-size:1.05rem;margin-bottom:.5rem}
.flip-back a{color:#fff;text-decoration:underline;font-size:.85rem}
section{padding:4rem 5%;max-width:1100px;margin:0 auto}
.section-title{font-size:1.6rem;font-weight:700;margin-bottom:.5rem;letter-spacing:-.3px}
.section-sub{color:var(--muted);margin-bottom:2.5rem;font-size:.92rem}
.list{display:grid;grid-template-columns:1fr;gap:.75rem;max-width:760px;margin:0 auto}
.list-item{display:flex;justify-content:space-between;align-items:center;background:var(--surface);border:1px solid var(--border);padding:1rem 1.25rem;border-radius:8px;transition:border-color .25s,transform .25s}
.list-item:hover{border-color:var(--accent);transform:translateX(4px)}
.list-item .meta{color:var(--muted);font-size:.85rem}
.list-item .tag{font-size:.72rem;padding:.2rem .55rem;border-radius:4px;background:rgba(63,185,80,.12);color:var(--accent-2);margin-left:.6rem}
footer{border-top:1px solid var(--border);padding:3rem 5%;margin-top:4rem}
footer .grid{grid-template-columns:2fr 1fr 1fr 1fr;gap:2rem;display:grid}
footer h4{font-size:.78rem;text-transform:uppercase;letter-spacing:.12em;color:var(--muted);margin-bottom:1rem;font-weight:600}
footer a{display:block;font-size:.88rem;margin-bottom:.5rem;color:var(--text);transition:color .2s}
footer a:hover{color:var(--accent)}
.foot-bottom{border-top:1px solid var(--border);margin-top:2rem;padding-top:1.5rem;text-align:center;color:var(--muted);font-size:.82rem}
@media(max-width:720px){footer .grid{grid-template-columns:1fr 1fr}nav{display:none}}