/* Base styles + variables */
:root{
  --bg:#0b0c10; --card:#111318; --muted:#161922;
  --text:#e7e9ee; --sub:#a7adbb; --accent:#5b6cff; --accent-2:#8b5cf6;
  --ring:#2d3350; --border:#202333;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Inter,sans-serif}

/* Typography & elements */
h1,h2,h3{line-height:1.2;margin:0 0 .6rem}
p{margin:.6rem 0}
a{color:var(--accent);text-decoration:none}
a:hover{opacity:.9}
img{max-width:100%;height:auto;display:block}

/* Layout helpers */
.container{max-width:1100px;margin:0 auto;padding:1.25rem}
.narrow{max-width:760px}
.section{padding:3.5rem 0}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:1.25rem;box-shadow:0 10px 30px rgba(0,0,0,.2)}
.btn{display:inline-block;padding:.75rem 1rem;border-radius:12px;background:linear-gradient(90deg,var(--accent),var(--accent-2));color:#fff;border:none}
.btn:focus{outline:2px solid var(--ring);outline-offset:2px}

/* Header & nav */
.site-header{position:sticky;top:0;background:rgba(11,12,16,.7);backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--border);z-index:10}
.nav{display:flex;align-items:center;justify-content:space-between;gap:1rem}
.logo{font-weight:700;color:#fff}
.nav-links{display:flex;gap:1rem}
.nav-links a{color:var(--text);padding:.4rem .6rem;border-radius:8px}
.nav-links a[aria-current="page"]{background:var(--muted)}
.menu-btn{display:none;background:none;border:1px solid var(--border);color:var(--text);padding:.5rem .7rem;border-radius:10px}
@media (max-width: 780px){
  .menu-btn{display:inline-block}
  .nav-links{display:none;flex-direction:column;background:var(--card);position:absolute;right:1rem;top:3.4rem;padding:.8rem;border:1px solid var(--border);border-radius:12px}
  .nav-links[data-open="true"]{display:flex}
}

/* Hero */
.hero{display:grid;gap:1.2rem;align-items:center}
.hero h1{font-size:clamp(1.8rem,4vw,3rem)}
.hero p{color:var(--sub)}
.hero-cta{display:flex;gap:.8rem;flex-wrap:wrap}

/* Grid */
.grid{display:grid;gap:1rem}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
@media (max-width: 900px){.grid.cols-3{grid-template-columns:1fr 1fr}}
@media (max-width: 640px){.grid.cols-3{grid-template-columns:1fr}}

/* Footer */
.site-footer{border-top:1px solid var(--border);color:var(--sub)}
.small{font-size:.9rem}

/* Accessibility */
.visually-hidden{position:absolute!important;clip:rect(1px,1px,1px,1px);padding:0;border:0;height:1px;width:1px;overflow:hidden}