:root { --dark: #09090b; --dark-lite: #18181b; --green: #22c55e; --grey: #3f3f46; --grey-lite: #d8dee4; --grey-muted: #a1a1aa; --red: #ef4444; --grey-dark: #71717a; --white: #ffffff; }  
body { background: var(--dark); color: var(--white); font-family: 'Plus Jakarta Sans', sans-serif; margin: 0; line-height: 1.6; -webkit-font-smoothing: antialiased; }        
.nav-header { position: sticky; top: 0; padding: 20px 5%; z-index: 100; background: rgba(9, 9, 11, 0.95); border-bottom: 1px solid transparent; transition: 0.3s; }
.nav-header.scrolled { border-bottom-color: var(--grey); background: rgba(9, 9, 11, 1); }        
.back-btn { display: inline-flex; align-items: center; gap: 8px; color: var(--white); text-decoration: none; font-size: 0.85rem; font-weight: 600; padding: 8px 16px; border-radius: 8px; border: 1px solid var(--grey); background: var(--dark-lite); transition: 0.2s ease; }
.back-btn:hover { background: var(--grey); border-color: var(--grey-muted); transform: translateX(-4px); }
.container { max-width: 1000px; margin: 0 auto; padding: 2rem 5% 100px; }        
.header-section { margin-bottom: 60px; text-align: center; display: flex; flex-direction: column; align-items: center; }
.badge { display: inline-block; padding: 6px 12px; border-radius: 8px; font-size: 0.7rem; font-weight: 800; background: rgba(34, 197, 94, 0.1); border: 1px solid var(--green); color: var(--green); text-transform: uppercase; margin-bottom: 20px; letter-spacing: 1px; }
h1 { font-size: 3.5rem; letter-spacing: -3px; margin: 0 0 20px; line-height: 1.1; max-width: 700px; }
h1 span { color: var(--green); }
.lead { color: var(--grey-muted); font-size: 1.2rem; max-width: 600px; margin: 0; }
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 50px; }        
.card { background: var(--dark-lite); border: 1px solid var(--grey); padding: 2rem; border-radius: 8px; transition: 0.3s ease; position: relative; display: flex; flex-direction: column; }
.card:hover { border-color: var(--green); transform: translateY(-5px); box-shadow: 0 10px 30px rgba(0,0,0,0.3); }        
.card-meta { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.step-num { font-size: 0.8rem; font-weight: 800; color: var(--green); background: rgba(34, 197, 94, 0.1); padding: 4px 12px; border-radius: 8px; text-transform: uppercase; letter-spacing: 1px; }
.card-icon { font-size: 1.8rem; }        
.card h3 { margin: 0 0 15px; color: var(--white); font-size: 1.4rem; letter-spacing: -0.5px; font-weight: 800; }
.card p { color: var(--grey-muted); font-size: 1rem; margin: 0 0 25px; line-height: 1.6; flex-grow: 1; }
.logic-box { background: #000; border: 1px solid var(--grey); padding: 20px; border-radius: 8px; margin-top: auto; font-family: 'Courier New', monospace; }
.logic-box h4 { margin: 0 0 10px; font-size: 0.75rem; color: var(--green); text-transform: uppercase; letter-spacing: 1px; font-family: 'Plus Jakarta Sans', sans-serif; }
.logic-box code { font-size: 0.85rem; color: rgba(255,255,255,0.9); display: block; line-height: 1.5; white-space: pre-wrap; word-break: break-all; }
footer { margin-top: 100px; text-align: center; color: var(--grey-muted); font-size: 0.8rem; border-top: 1px solid var(--grey); padding-top: 40px; }
@media (max-width: 850px) { 
    .grid { grid-template-columns: 1fr; } 
    h1 { font-size: 2.8rem; }
    .card { padding: 2rem; }
}