:root {
    --line-bg: #0f172a;
    --line-text: #f1f5f9;
    --line-primary: #3b82f6; /* Tech Blue */
    --line-secondary: #1e293b;
    --line-accent: #10b981; /* Emerald Green */
    --line-border: #334155;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    background-color: var(--line-bg); color: var(--line-text);
    font-family: 'Roboto Mono', 'Courier New', Courier, monospace;
    line-height: 1.6; overflow-x: hidden;
}

/* Network Topology Background */
.line-bg-effect {
    position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; z-index: -1;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(16, 185, 129, 0.05) 0%, transparent 50%);
}
.line-bg-effect::after {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background-image: linear-gradient(var(--line-border) 1px, transparent 1px),
                      linear-gradient(90deg, var(--line-border) 1px, transparent 1px);
    background-size: 50px 50px; opacity: 0.2; pointer-events: none;
}

.line-container { max-width: 1200px; margin: 0 auto; padding: 0 30px;}

/* Header */
.line-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 30px 0; margin-bottom: 60px; border-bottom: 2px solid var(--line-primary);
}
.line-brand {
    font-size: 24px; font-weight: 700; color: var(--line-text);
    display: flex; align-items: center; gap: 10px;
}
.line-brand::before {
    content: ''; display: inline-block; width: 10px; height: 10px;
    background: var(--line-accent); box-shadow: 0 0 10px var(--line-accent);
}
.line-nav { display: flex; gap: 30px; }
.line-nav a {
    font-size: 14px; font-weight: 500; color: #94a3b8; text-decoration: none;
    text-transform: uppercase; letter-spacing: 1px; transition: color 0.3s;
}
.line-nav a:hover, .line-nav a.active { color: var(--line-primary); }

/* Hero */
.line-hero {
    display: flex; align-items: center; justify-content: space-between; gap: 50px;
    margin-bottom: 100px;
}
.lh-content { flex: 1; }
.lh-content h1 {
    font-size: 42px; font-weight: 700; color: var(--line-text);
    line-height: 1.3; margin-bottom: 20px;
}
.lh-content h1 span { color: var(--line-primary); }
.lh-content p { font-size: 16px; color: #94a3b8; margin-bottom: 40px; max-width: 500px;}

.lh-visual {
    flex: 1; height: 300px; position: relative;
}
.lh-visual::before {
    content: ''; position: absolute; top: 50%; left: 0; width: 100%; height: 2px;
    background: linear-gradient(90deg, transparent, var(--line-primary), transparent);
    box-shadow: 0 0 15px var(--line-primary);
}
.lh-visual::after {
    content: ''; position: absolute; top: 50%; left: 50%; width: 20px; height: 20px;
    background: var(--line-accent); border-radius: 50%; transform: translate(-50%, -50%);
    box-shadow: 0 0 20px var(--line-accent); animation: pulse 2s infinite;
}
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { box-shadow: 0 0 0 20px rgba(16, 185, 129, 0); }
    100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.btn-line {
    display: inline-block; padding: 12px 30px; font-size: 14px; font-weight: 700;
    color: var(--line-bg); background: var(--line-primary); border: 1px solid var(--line-primary);
    transition: all 0.3s; margin-right: 15px; text-decoration: none; text-transform: uppercase;
}
.btn-line:hover { background: transparent; color: var(--line-primary); box-shadow: 0 0 15px rgba(59, 130, 246, 0.5);}
.btn-line-alt {
    display: inline-block; padding: 12px 30px; font-size: 14px; font-weight: 700;
    color: var(--line-primary); background: transparent; border: 1px solid var(--line-primary);
    transition: all 0.3s; text-decoration: none; text-transform: uppercase;
}
.btn-line-alt:hover { background: var(--line-primary); color: var(--line-bg); }

/* Stats */
.line-stats {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 100px;
}
.ls-item {
    background: var(--line-secondary); padding: 30px; border: 1px solid var(--line-border);
    text-align: center; position: relative; overflow: hidden;
}
.ls-item::before {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 2px;
    background: var(--line-accent);
}
.ls-val { font-size: 32px; font-weight: 700; color: var(--line-text); margin-bottom: 5px;}
.ls-lbl { font-size: 12px; color: #94a3b8; text-transform: uppercase;}

/* Features */
.line-features { margin-bottom: 100px;}
.line-features h2 { font-size: 28px; margin-bottom: 50px; color: var(--line-text); border-left: 4px solid var(--line-primary); padding-left: 15px;}
.lf-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px;}
.lf-card {
    background: var(--line-secondary); padding: 35px; border: 1px solid var(--line-border);
    transition: transform 0.3s, border-color 0.3s;
}
.lf-card:hover { transform: translateY(-5px); border-color: var(--line-primary); }
.lf-card h3 { font-size: 18px; margin-bottom: 15px; color: var(--line-primary);}
.lf-card p { font-size: 14px; color: #94a3b8;}

/* Nodes */
.line-nodes { margin-bottom: 100px;}
.line-nodes h2 { font-size: 28px; margin-bottom: 50px; color: var(--line-text); border-left: 4px solid var(--line-primary); padding-left: 15px;}
.ln-list { display: flex; flex-direction: column; gap: 10px;}
.ln-item {
    display: flex; justify-content: space-between; padding: 15px 20px;
    background: var(--line-secondary); border: 1px solid var(--line-border);
    font-size: 14px;
}
.ln-status { color: var(--line-accent); font-weight: bold;}

/* FAQ */
.line-faq { margin-bottom: 120px;}
.line-faq h2 { font-size: 28px; margin-bottom: 50px; color: var(--line-text); border-left: 4px solid var(--line-primary); padding-left: 15px;}
.l-faq-item {
    margin-bottom: 20px; background: var(--line-secondary); padding: 25px;
    border: 1px solid var(--line-border);
}
.l-fq { font-size: 16px; font-weight: 700; color: var(--line-primary); margin-bottom: 10px;}
.l-fa { font-size: 14px; color: #94a3b8;}

footer {
    text-align: center; padding: 30px 0; color: #64748b; font-size: 12px;
    border-top: 1px solid var(--line-border); text-transform: uppercase;
}

@media (max-width: 900px) {
    .line-hero { flex-direction: column; text-align: center; }
    .lh-content p { margin: 0 auto 40px; }
    .lh-visual { width: 100%; height: 200px; margin-top: 40px; }
    .line-stats { grid-template-columns: 1fr; }
    .lf-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .line-header { flex-direction: column; gap: 20px; }
    .line-nav { flex-wrap: wrap; justify-content: center; gap: 15px;}
    .btn-line, .btn-line-alt { display: block; margin: 10px auto; width: 100%;}
}