:root {
    --eco-bg: #e8f5e9;
    --eco-text: #2e7d32;
    --eco-primary: #4caf50;
    --eco-secondary: #8bc34a;
    --eco-accent: #c8e6c9;
    --eco-surface: #ffffff;
    --eco-leaf: #388e3c;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    background-color: var(--eco-bg); color: var(--eco-text);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-image: radial-gradient(circle at 10% 20%, rgba(76, 175, 80, 0.05) 0%, transparent 20%),
                      radial-gradient(circle at 90% 80%, rgba(139, 195, 74, 0.05) 0%, transparent 20%);
}
a { text-decoration: none; color: inherit; }

.eco-container { max-width: 1000px; margin: 0 auto; padding: 30px; position: relative;}

/* Header */
.eco-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 20px 0; border-bottom: 2px solid var(--eco-accent);
    margin-bottom: 40px;
}
.eco-brand {
    font-size: 28px; font-weight: 800; color: var(--eco-leaf);
    display: flex; align-items: center; gap: 10px;
}
.eco-brand::before { content: '🌿'; font-size: 32px; }
.eco-nav { display: flex; gap: 25px; }
.eco-nav a {
    font-size: 16px; font-weight: 600; color: var(--eco-primary);
    padding: 5px 15px; border-radius: 20px; transition: all 0.3s;
}
.eco-nav a:hover, .eco-nav a.active { background: var(--eco-accent); color: var(--eco-leaf); }

/* Hero */
.eco-hero {
    text-align: center; padding: 60px 20px; background: var(--eco-surface);
    border-radius: 30px; box-shadow: 0 10px 30px rgba(76, 175, 80, 0.1);
    margin-bottom: 60px; position: relative; overflow: hidden;
}
.eco-hero::after {
    content: ''; position: absolute; bottom: -50px; right: -50px; width: 150px; height: 150px;
    background: var(--eco-accent); border-radius: 50%; opacity: 0.5;
}
.eco-hero h1 { font-size: 42px; color: var(--eco-leaf); margin-bottom: 20px; }
.eco-hero p { font-size: 18px; color: var(--eco-primary); margin-bottom: 40px; max-width: 700px; margin-left: auto; margin-right: auto;}
.btn-eco {
    display: inline-block; padding: 15px 40px; font-size: 18px; font-weight: bold;
    color: #fff; background: var(--eco-primary); border-radius: 30px;
    transition: all 0.3s; box-shadow: 0 5px 15px rgba(76, 175, 80, 0.3); margin: 0 10px;
}
.btn-eco:hover { background: var(--eco-leaf); transform: translateY(-3px); box-shadow: 0 8px 20px rgba(76, 175, 80, 0.4);}
.btn-eco-alt {
    display: inline-block; padding: 15px 40px; font-size: 18px; font-weight: bold;
    color: var(--eco-leaf); background: var(--eco-accent); border-radius: 30px;
    transition: all 0.3s; margin: 0 10px;
}
.btn-eco-alt:hover { background: #a5d6a7; transform: translateY(-3px);}

/* Stats */
.eco-stats {
    display: flex; justify-content: space-around; margin-bottom: 60px;
}
.es-item {
    text-align: center; background: var(--eco-surface); padding: 30px;
    border-radius: 20px; flex: 1; margin: 0 10px; box-shadow: 0 5px 15px rgba(0,0,0,0.02);
}
.es-val { font-size: 36px; font-weight: 900; color: var(--eco-secondary); margin-bottom: 10px;}
.es-lbl { font-size: 16px; font-weight: 600; color: var(--eco-primary);}

/* Grid */
.eco-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-bottom: 60px;}
.eg-card {
    background: var(--eco-surface); padding: 40px 30px; border-radius: 20px;
    text-align: center; transition: all 0.3s; border: 2px solid transparent;
}
.eg-card:hover { border-color: var(--eco-accent); transform: translateY(-5px); box-shadow: 0 10px 25px rgba(76, 175, 80, 0.1);}
.eg-icon { font-size: 48px; margin-bottom: 20px; }
.eg-card h3 { font-size: 22px; color: var(--eco-leaf); margin-bottom: 15px;}
.eg-card p { font-size: 15px; color: var(--eco-primary); text-align: justify;}

/* Nodes */
.eco-nodes { margin-bottom: 60px; background: var(--eco-surface); padding: 40px; border-radius: 30px;}
.eco-nodes h2 { font-size: 28px; color: var(--eco-leaf); margin-bottom: 30px; text-align: center;}
.node-tree { display: flex; flex-wrap: wrap; justify-content: center; gap: 15px;}
.n-eco {
    padding: 10px 20px; background: var(--eco-accent); color: var(--eco-leaf);
    border-radius: 15px; font-weight: bold; font-size: 14px;
}
.n-eco span { font-weight: normal; color: var(--eco-primary); margin-left: 10px;}

/* FAQ */
.eco-faq { margin-bottom: 60px;}
.eco-faq h2 { font-size: 28px; color: var(--eco-leaf); margin-bottom: 30px; text-align: center;}
.faq-item {
    background: var(--eco-surface); margin-bottom: 20px; padding: 25px;
    border-radius: 20px; box-shadow: 0 5px 15px rgba(0,0,0,0.02);
}
.fq-q { font-size: 18px; font-weight: bold; color: var(--eco-leaf); margin-bottom: 10px; display: flex; align-items: center;}
.fq-q::before { content: '🌱'; margin-right: 10px;}
.fq-a { font-size: 15px; color: var(--eco-primary); padding-left: 35px;}

footer { text-align: center; padding: 30px; color: var(--eco-primary); font-weight: 600; border-top: 2px solid var(--eco-accent);}

@media (max-width: 800px) {
    .eco-header { flex-direction: column; gap: 15px; }
    .eco-stats { flex-direction: column; gap: 20px; }
    .es-item { margin: 0; }
    .eco-grid { grid-template-columns: 1fr; }
    .btn-eco, .btn-eco-alt { display: block; margin: 10px auto; width: 80%;}
}