:root {
    --pcb-bg: #003300;
    --pcb-text: #00ff00;
    --pcb-primary: #00ff00;
    --pcb-secondary: #ffcc00;
    --pcb-accent: #004400;
    --pcb-trace: #006600;
    --font-pcb: 'Courier New', Courier, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    background-color: var(--pcb-bg); color: var(--pcb-text);
    font-family: var(--font-pcb);
    line-height: 1.6;
    background-image: 
        linear-gradient(var(--pcb-trace) 1px, transparent 1px),
        linear-gradient(90deg, var(--pcb-trace) 1px, transparent 1px);
    background-size: 20px 20px;
    position: relative;
}
body::before {
    content: ''; position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
    background: radial-gradient(circle, transparent 20%, var(--pcb-bg) 120%);
    pointer-events: none; z-index: -1;
}
a { text-decoration: none; color: inherit; }

.pcb-container { max-width: 1100px; margin: 0 auto; padding: 20px;}

/* Header */
.pcb-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 15px 30px; background: var(--pcb-accent);
    border: 2px solid var(--pcb-primary); border-radius: 10px;
    margin-bottom: 40px; position: relative;
    box-shadow: 0 0 15px rgba(0, 255, 0, 0.2);
}
.pcb-brand {
    font-size: 24px; font-weight: bold; color: var(--pcb-primary);
    text-transform: uppercase; letter-spacing: 2px; display: flex; align-items: center; gap: 10px;
}
.pcb-brand::before {
    content: ''; display: inline-block; width: 15px; height: 15px;
    background: var(--pcb-secondary); border-radius: 50%;
}
.pcb-nav { display: flex; gap: 20px; }
.pcb-nav a {
    font-size: 14px; color: var(--pcb-text); text-transform: uppercase;
    padding: 5px 10px; border: 1px solid transparent; transition: all 0.3s;
}
.pcb-nav a:hover, .pcb-nav a.active { border-color: var(--pcb-primary); background: rgba(0, 255, 0, 0.1); }

/* Hero */
.pcb-hero {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 60px; padding: 40px; background: var(--pcb-accent);
    border: 2px solid var(--pcb-primary); border-radius: 10px;
    position: relative; overflow: hidden;
}
.pcb-hero::after {
    content: ''; position: absolute; top: -50px; right: -50px; width: 150px; height: 150px;
    border: 10px solid var(--pcb-trace); border-radius: 50%; opacity: 0.5;
}
.hero-content { flex: 1; padding-right: 40px; position: relative; z-index: 1;}
.hero-content h1 {
    font-size: 36px; margin-bottom: 20px; color: #fff; text-shadow: 0 0 10px var(--pcb-primary);
    text-transform: uppercase;
}
.hero-content p { font-size: 16px; margin-bottom: 30px;}
.hero-visual {
    flex: 1; height: 250px; border: 2px solid var(--pcb-primary); border-radius: 10px;
    position: relative; display: flex; align-items: center; justify-content: center;
    background: repeating-linear-gradient(45deg, var(--pcb-accent), var(--pcb-accent) 10px, var(--pcb-bg) 10px, var(--pcb-bg) 20px);
}
.chip {
    width: 100px; height: 100px; background: #111; border: 2px solid var(--pcb-secondary);
    display: flex; align-items: center; justify-content: center; color: var(--pcb-secondary);
    font-size: 12px; font-weight: bold; text-align: center; box-shadow: 0 0 20px rgba(255, 204, 0, 0.3);
}

.btn-pcb {
    display: inline-block; padding: 10px 25px; font-size: 16px; font-weight: bold;
    color: var(--pcb-bg); background: var(--pcb-primary); border: 2px solid var(--pcb-primary);
    transition: all 0.3s; text-transform: uppercase; margin-right: 15px; border-radius: 5px;
}
.btn-pcb:hover { background: transparent; color: var(--pcb-primary); box-shadow: 0 0 15px rgba(0, 255, 0, 0.5);}
.btn-pcb-alt {
    display: inline-block; padding: 10px 25px; font-size: 16px; font-weight: bold;
    color: var(--pcb-secondary); background: transparent; border: 2px solid var(--pcb-secondary);
    transition: all 0.3s; text-transform: uppercase; border-radius: 5px;
}
.btn-pcb-alt:hover { background: rgba(255, 204, 0, 0.1); box-shadow: 0 0 15px rgba(255, 204, 0, 0.3);}

/* Stats */
.pcb-stats {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 60px;
}
.ps-item {
    background: var(--pcb-accent); padding: 20px; text-align: center;
    border: 2px solid var(--pcb-primary); border-radius: 10px; position: relative;
}
.ps-item::before {
    content: ''; position: absolute; top: 10px; left: 10px; width: 8px; height: 8px;
    background: var(--pcb-secondary); border-radius: 50%;
}
.ps-val { font-size: 32px; font-weight: bold; color: #fff; margin-bottom: 5px; text-shadow: 0 0 5px var(--pcb-primary);}
.ps-lbl { font-size: 12px; color: var(--pcb-primary); text-transform: uppercase;}

/* Grid */
.pcb-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; margin-bottom: 60px;}
.pg-card {
    background: var(--pcb-accent); padding: 30px; border: 2px solid var(--pcb-primary);
    border-radius: 10px; position: relative;
}
.pg-card h3 { font-size: 20px; margin-bottom: 15px; color: #fff; text-transform: uppercase; border-bottom: 2px dashed var(--pcb-trace); padding-bottom: 10px;}
.pg-card p { font-size: 14px; text-align: justify;}

/* Nodes */
.pcb-nodes { margin-bottom: 60px; background: var(--pcb-accent); padding: 30px; border: 2px solid var(--pcb-primary); border-radius: 10px;}
.pcb-nodes h2 { font-size: 24px; margin-bottom: 20px; color: #fff; text-transform: uppercase;}
.node-circuit { display: flex; flex-direction: column; gap: 10px;}
.n-pcb {
    display: flex; justify-content: space-between; padding: 10px; background: var(--pcb-bg);
    border: 1px solid var(--pcb-trace); font-size: 14px; border-radius: 5px;
}
.n-pcb span { color: var(--pcb-secondary);}

/* FAQ */
.pcb-faq { margin-bottom: 60px;}
.pcb-faq h2 { font-size: 24px; margin-bottom: 20px; color: #fff; text-transform: uppercase;}
.faq-item { margin-bottom: 15px; background: var(--pcb-accent); padding: 20px; border: 2px solid var(--pcb-primary); border-radius: 10px; border-left: 5px solid var(--pcb-secondary);}
.fq-q { font-size: 16px; font-weight: bold; color: var(--pcb-primary); margin-bottom: 10px;}
.fq-a { font-size: 14px;}

footer { text-align: center; padding-top: 20px; border-top: 2px solid var(--pcb-primary); font-size: 12px; color: var(--pcb-trace); text-transform: uppercase;}

@media (max-width: 900px) {
    .pcb-hero { flex-direction: column; }
    .hero-content { padding-right: 0; margin-bottom: 30px;}
    .hero-visual { width: 100%; }
    .pcb-stats { grid-template-columns: repeat(2, 1fr); }
    .pcb-grid { grid-template-columns: 1fr; }
    .btn-pcb, .btn-pcb-alt { display: block; margin: 10px 0; width: 100%; text-align: center;}
}