:root {
    --inst-bg: #f8f9fa;
    --inst-text: #343a40;
    --inst-primary: #495057;
    --inst-secondary: #ff6b6b;
    --inst-accent: #ced4da;
    --font-inst: 'Courier New', Courier, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    background-color: var(--inst-bg); color: var(--inst-text);
    font-family: var(--font-inst);
    line-height: 1.6;
    background-image: 
        linear-gradient(90deg, transparent 95%, rgba(73, 80, 87, 0.1) 95%),
        linear-gradient(transparent 95%, rgba(73, 80, 87, 0.1) 95%);
    background-size: 20px 20px;
}
a { text-decoration: none; color: inherit; }

.inst-container { max-width: 1000px; margin: 40px auto; padding: 40px; background: #fff; border: 2px solid var(--inst-primary); box-shadow: 10px 10px 0 var(--inst-accent);}

/* Header */
.inst-header {
    display: flex; justify-content: space-between; align-items: center;
    padding-bottom: 20px; border-bottom: 2px dashed var(--inst-primary);
    margin-bottom: 40px;
}
.inst-brand {
    font-size: 28px; font-weight: bold; color: var(--inst-primary);
    text-transform: uppercase; letter-spacing: 2px;
}
.inst-brand::after { content: '_'; animation: blink 1s infinite; }
@keyframes blink { 50% { opacity: 0; } }
.inst-nav { display: flex; gap: 20px; }
.inst-nav a {
    font-size: 14px; font-weight: bold; color: var(--inst-text);
    text-transform: uppercase; padding: 5px 10px; border: 1px solid transparent;
}
.inst-nav a:hover, .inst-nav a.active { border-color: var(--inst-primary); background: var(--inst-bg); }

/* Hero */
.inst-hero {
    display: flex; align-items: center; gap: 40px; margin-bottom: 60px;
    padding: 40px; border: 2px solid var(--inst-primary); background: var(--inst-bg);
}
.hero-content { flex: 1; }
.hero-content h1 {
    font-size: 36px; margin-bottom: 20px; color: var(--inst-primary);
    text-transform: uppercase; border-bottom: 2px solid var(--inst-primary); padding-bottom: 10px;
}
.hero-content p { font-size: 16px; margin-bottom: 30px;}
.hero-visual {
    flex: 1; height: 200px; border: 2px solid var(--inst-primary); background: #fff;
    position: relative; display: flex; align-items: center; justify-content: center;
    overflow: hidden;
}
.dial {
    width: 150px; height: 150px; border: 2px solid var(--inst-primary); border-radius: 50%;
    position: relative;
}
.needle {
    position: absolute; bottom: 50%; left: 50%; width: 2px; height: 60px;
    background: var(--inst-secondary); transform-origin: bottom;
    transform: rotate(45deg); animation: swing 2s ease-in-out infinite alternate;
}
@keyframes swing { 0% { transform: rotate(-45deg); } 100% { transform: rotate(45deg); } }

.btn-inst {
    display: inline-block; padding: 10px 25px; font-size: 16px; font-weight: bold;
    color: #fff; background: var(--inst-primary); text-transform: uppercase;
    border: 2px solid var(--inst-primary); transition: all 0.2s; margin-right: 10px;
}
.btn-inst:hover { background: #fff; color: var(--inst-primary); }
.btn-inst-alt {
    display: inline-block; padding: 10px 25px; font-size: 16px; font-weight: bold;
    color: var(--inst-primary); background: #fff; text-transform: uppercase;
    border: 2px solid var(--inst-primary); transition: all 0.2s;
}
.btn-inst-alt:hover { background: var(--inst-accent); }

/* Stats */
.inst-stats {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 60px;
}
.is-item {
    padding: 20px; text-align: center; border: 2px solid var(--inst-primary);
    background: var(--inst-bg);
}
.is-val { font-size: 32px; font-weight: bold; color: var(--inst-secondary); margin-bottom: 5px;}
.is-lbl { font-size: 12px; font-weight: bold; text-transform: uppercase;}

/* Grid */
.inst-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; margin-bottom: 60px;}
.ig-card {
    padding: 30px; border: 2px solid var(--inst-primary); background: #fff;
    position: relative;
}
.ig-card::before {
    content: ''; position: absolute; top: 5px; left: 5px; right: 5px; bottom: 5px;
    border: 1px dashed var(--inst-accent); pointer-events: none;
}
.ig-card h3 { font-size: 20px; font-weight: bold; margin-bottom: 15px; text-transform: uppercase; color: var(--inst-primary);}
.ig-card p { font-size: 14px; text-align: justify;}

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

/* FAQ */
.inst-faq { margin-bottom: 60px;}
.inst-faq h2 { font-size: 24px; font-weight: bold; margin-bottom: 20px; text-transform: uppercase;}
.faq-item { margin-bottom: 20px; padding: 20px; border: 2px solid var(--inst-primary); background: var(--inst-bg);}
.fq-q { font-size: 16px; font-weight: bold; margin-bottom: 10px; color: var(--inst-primary); text-transform: uppercase;}
.fq-a { font-size: 14px;}

footer { text-align: center; padding-top: 20px; border-top: 2px dashed var(--inst-primary); font-size: 12px; font-weight: bold; text-transform: uppercase;}

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