body {
    background-color: #0f172a; /* Deep Slate */
    color: #f8fafc;
    font-family: 'Inter', sans-serif, system-ui;
    line-height: 1.6;
    margin: 0;
}

header { padding: 2rem; border-bottom: 1px solid #1e293b; }
.logo { font-weight: bold; font-size: 1.5rem; letter-spacing: 2px; }
.logo span { color: #10b981; } /* Emerald Green */

.hero {
    text-align: center;
    padding: 100px 20px;
    background: radial-gradient(circle at center, #1e293b 0%, #0f172a 100%);
}

h1 { font-size: 3rem; margin-bottom: 1rem; }

.formula-box {
    background: #000;
    padding: 2rem;
    display: inline-block;
    border-radius: 8px;
    border: 1px solid #10b981;
    margin-top: 2rem;
}

code { font-family: 'Courier New', monospace; font-size: 1.4rem; color: #10b981; display: block; }

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding: 4rem 2rem;
}

.card {
    background: #1e293b;
    padding: 2rem;
    border-radius: 8px;
    transition: transform 0.3s;
}

.card:hover { transform: translateY(-10px); border: 1px solid #10b981; }

footer { text-align: center; padding: 2rem; font-size: 0.8rem; opacity: 0.6; }

.cta-section {
    text-align: center;
    padding: 4rem 2rem;
    background-color: #0f172a;
    border-top: 1px solid #1e293b;
}

.cta-section h2 {
    font-size: 2rem;
    color: #10b981;
}

.audit-form {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.audit-form input {
    padding: 1rem;
    width: 300px;
    background: #1e293b;
    border: 1px solid #334155;
    color: white;
    border-radius: 4px;
    font-family: 'Inter', sans-serif;
}

.audit-form input:focus {
    outline: none;
    border-color: #10b981;
}

.audit-form button {
    padding: 1rem 2rem;
    background: #10b981;
    color: #000;
    border: none;
    font-weight: bold;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.3s;
}

.audit-form button:hover {
    background: #059669;
}