:root{

/* COLORS */

--bg-primary:#0f172a;
--bg-secondary:#1e293b;
--border:#334155;

--text-primary:#ffffff;
--text-secondary:#94a3b8;

--accent:#2563eb;


/* TYPOGRAPHY */

--font-system:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;

--text-sm:14px;
--text-md:16px;
--text-lg:20px;
--text-xl:32px;
--text-hero:56px;


/* SPACING */

--space-1:8px;
--space-2:12px;
--space-3:16px;
--space-4:24px;
--space-5:40px;
--space-6:60px;


/* RADIUS */

--radius-md:12px;
--radius-lg:16px;


/* LAYOUT */

--container-width:1200px;

}


/* BASE LAYOUT */

body{
margin:0;
background:var(--bg-primary);
color:var(--text-primary);
font-family:var(--font-system);
line-height:1.6;
padding-top:60px;
}


/* CONTAINER */

.container{
max-width:var(--container-width);
margin:auto;
padding:0 var(--space-4);
}


/* SECTIONS */

.section{
padding:60px 0;
}

.section:first-of-type{
padding-top:40px;
}

.section:last-of-type{
padding-bottom:40px;
}

.section-title{
font-size:var(--text-lg);
color:var(--text-secondary);
margin-bottom:var(--space-4);
}


/* GRID */

.grid{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
gap:20px;
}


/* CARDS */

.card{
background:var(--bg-secondary);
border:1px solid var(--border);
padding:26px;
border-radius:var(--radius-lg);
text-decoration:none;
color:white;
transition:.25s;
}

.card:hover{
transform:translateY(-6px);
background:#334155;
}

.card-title{
font-size:18px;
font-weight:700;
margin-bottom:6px;
}

.card-desc{
font-size:14px;
color:var(--text-secondary);
}


/* HERO */

.hero{
text-align:center;
padding:120px 20px 60px;
}

.hero h1{
font-size:var(--text-hero);
margin-bottom:10px;
}

.hero p{
color:var(--text-secondary);
}


/* LOGO */

.logo{
width:140px;
display:block;
margin:auto;
margin-bottom:20px;
filter:drop-shadow(0 10px 25px rgba(0,0,0,.6));
}


/* NAVBAR */

.nav{
position:fixed;
top:0;
width:100%;
background:rgba(15,23,42,.85);
backdrop-filter:blur(10px);
border-bottom:1px solid var(--border);
z-index:10;
}

.nav-inner{
max-width:1200px;
margin:auto;
padding:14px 20px;
display:flex;
justify-content:space-between;
align-items:center;
}

.brand{
font-weight:700;
}

.nav-links a{
color:var(--text-secondary);
text-decoration:none;
margin-left:20px;
font-size:14px;
}

.nav-links a:hover{
color:white;
}


/* FOOTER */

.footer{
text-align:center;
padding:60px 20px;
color:#64748b;
font-size:13px;
}


/* MOBILE */

@media (max-width:768px){

.hero h1{
font-size:36px;
}

.logo{
width:110px;
}

.nav-inner{
flex-direction:column;
gap:8px;
}

}