:root {
    --bau-bg: #f5f5dc;
    --bau-text: #1a1a1a;
    --bau-primary: #d32f2f;
    --bau-secondary: #1976d2;
    --bau-accent: #fbc02d;
    --font-bau: 'Futura', 'Helvetica Neue', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    background-color: var(--bau-bg); color: var(--bau-text);
    font-family: var(--font-bau);
    line-height: 1.5;
    background-image: 
        linear-gradient(45deg, transparent 49%, var(--bau-text) 49%, var(--bau-text) 51%, transparent 51%),
        linear-gradient(-45deg, transparent 49%, var(--bau-text) 49%, var(--bau-text) 51%, transparent 51%);
    background-size: 100px 100px;
    background-position: center;
    background-attachment: fixed;
    opacity: 0.95;
}
a { text-decoration: none; color: inherit; }

.bau-container { max-width: 1000px; margin: 40px auto; padding: 40px; background: #fff; border: 4px solid var(--bau-text); position: relative; box-shadow: 15px 15px 0 var(--bau-accent);}

/* Header */
.bau-header {
    display: flex; justify-content: space-between; align-items: center;
    padding-bottom: 20px; border-bottom: 4px solid var(--bau-text);
    margin-bottom: 40px;
}
.bau-brand {
    font-size: 36px; font-weight: 900; color: var(--bau-primary);
    text-transform: uppercase; letter-spacing: -1px;
    display: flex; align-items: center; gap: 10px;
}
.bau-brand::before {
    content: ''; display: inline-block; width: 30px; height: 30px;
    background: var(--bau-secondary); border-radius: 50%;
}
.bau-nav { display: flex; gap: 20px; }
.bau-nav a {
    font-size: 16px; font-weight: bold; color: var(--bau-text);
    text-transform: uppercase; padding: 5px 10px; transition: all 0.2s;
}
.bau-nav a:hover, .bau-nav a.active { background: var(--bau-text); color: #fff; }

/* Hero */
.bau-hero {
    display: flex; align-items: stretch; gap: 40px; margin-bottom: 60px;
}
.hero-content { flex: 2; padding: 40px; background: var(--bau-accent); border: 4px solid var(--bau-text);}
.hero-content h1 {
    font-size: 48px; font-weight: 900; margin-bottom: 20px;
    text-transform: uppercase; line-height: 1.1;
}
.hero-content p { font-size: 18px; font-weight: bold; margin-bottom: 30px;}
.hero-visual {
    flex: 1; background: var(--bau-primary); border: 4px solid var(--bau-text);
    display: flex; align-items: center; justify-content: center; position: relative;
    overflow: hidden;
}
.hero-visual::after {
    content: ''; position: absolute; width: 150%; height: 150%;
    background: var(--bau-secondary); border-radius: 50%; top: 50%; left: 50%;
    transform: translate(-50%, -50%); border: 4px solid var(--bau-text);
}
.btn-bau {
    display: inline-block; padding: 15px 30px; font-size: 18px; font-weight: 900;
    color: #fff; background: var(--bau-text); text-transform: uppercase;
    border: 4px solid var(--bau-text); transition: all 0.2s; margin-right: 15px;
}
.btn-bau:hover { background: #fff; color: var(--bau-text); }
.btn-bau-alt {
    display: inline-block; padding: 15px 30px; font-size: 18px; font-weight: 900;
    color: var(--bau-text); background: #fff; text-transform: uppercase;
    border: 4px solid var(--bau-text); transition: all 0.2s;
}
.btn-bau-alt:hover { background: var(--bau-primary); color: #fff; border-color: var(--bau-primary);}

/* Stats */
.bau-stats {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 60px;
}
.bs-item {
    padding: 20px; text-align: center; border: 4px solid var(--bau-text);
    background: #fff;
}
.bs-item:nth-child(even) { background: var(--bau-secondary); color: #fff;}
.bs-item:nth-child(even) .bs-lbl { color: #fff;}
.bs-val { font-size: 36px; font-weight: 900; margin-bottom: 5px;}
.bs-lbl { font-size: 14px; font-weight: bold; text-transform: uppercase; color: var(--bau-primary);}

/* Grid */
.bau-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; margin-bottom: 60px;}
.bg-card {
    padding: 30px; border: 4px solid var(--bau-text); background: #fff;
    position: relative;
}
.bg-card::before {
    content: ''; position: absolute; top: -10px; left: -10px; width: 40px; height: 40px;
    background: var(--bau-primary); z-index: -1;
}
.bg-card h3 { font-size: 24px; font-weight: 900; margin-bottom: 15px; text-transform: uppercase;}
.bg-card p { font-size: 16px; font-weight: bold;}

/* Nodes */
.bau-nodes { margin-bottom: 60px; padding: 30px; border: 4px solid var(--bau-text); background: var(--bau-accent);}
.bau-nodes h2 { font-size: 28px; font-weight: 900; margin-bottom: 20px; text-transform: uppercase; border-bottom: 4px solid var(--bau-text); padding-bottom: 10px;}
.node-bau-list { display: flex; flex-direction: column; gap: 10px;}
.n-bau {
    display: flex; justify-content: space-between; padding: 15px; background: #fff;
    border: 4px solid var(--bau-text); font-size: 16px; font-weight: 900; text-transform: uppercase;
}
.n-bau span { color: var(--bau-secondary);}

/* FAQ */
.bau-faq { margin-bottom: 60px;}
.bau-faq h2 { font-size: 28px; font-weight: 900; margin-bottom: 20px; text-transform: uppercase;}
.faq-item { margin-bottom: 20px; padding: 20px; border: 4px solid var(--bau-text); background: #fff;}
.fq-q { font-size: 18px; font-weight: 900; margin-bottom: 10px; color: var(--bau-primary); text-transform: uppercase;}
.fq-a { font-size: 16px; font-weight: bold;}

footer { text-align: center; padding-top: 20px; border-top: 4px solid var(--bau-text); font-size: 14px; font-weight: 900; text-transform: uppercase;}

@media (max-width: 900px) {
    .bau-hero { flex-direction: column; }
    .hero-visual { height: 200px; }
    .bau-stats { grid-template-columns: repeat(2, 1fr); }
    .bau-grid { grid-template-columns: 1fr; }
    .btn-bau, .btn-bau-alt { display: block; margin: 10px 0; width: 100%; text-align: center;}
}