/* --- Global Styles & "ROI-Driven Authority" Vibe --- */
:root {
    --primary-color: #007aff;  /* A strong, trustworthy blue */
    --dark-bg: #0D1117;        /* A very dark "tech" background */
    --card-bg: #161B22;        /* A slightly lighter card background */
    --text-primary: #FFFFFF;
    --text-secondary: #b0b8c4;
    --border-color: #30363d;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-secondary);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3 {
    color: var(--text-primary);
    margin-bottom: 15px;
    font-weight: 600;
}

h1 { font-size: 3.5rem; line-height: 1.2; }
h2 { font-size: 2.5rem; text-align: center; margin-bottom: 40px; }
h3 { font-size: 1.4rem; color: var(--primary-color); }

p { margin-bottom: 15px; }
a { color: var(--primary-color); text-decoration: none; }

section {
    padding: 80px 0;
}

/* --- Header & Navigation --- */
header {
    background-color: var(--dark-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-links {
    list-style: none;
    display: flex;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--text-primary);
}

/* --- Buttons --- */
.cta-button {
    background-color: var(--primary-color);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    transition: background-color 0.3s ease;
}

.cta-button:hover {
    background-color: #0056b3;
}

/* --- Hero Section --- */
#hero {
    text-align: center;
    padding: 100px 20px;
}

#hero h1 {
    background: linear-gradient(90deg, #FFFFFF, #b0b8c4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

#hero .subtitle {
    font-size: 1.5rem;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 20px;
}

#hero p {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 30px auto;
}

.cta-hero {
    font-size: 1.2rem;
    padding: 15px 35px;
}

/* --- Services Section --- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.service-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 30px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

/* --- Results Section --- */
#results {
    background-color: var(--card-bg);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    text-align: center;
}

.result-card .result-number {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--primary-color);
    display: block;
}

.result-card p {
    font-size: 1.1rem;
    color: var(--text-primary);
}

/* --- Testimonials Section --- */
.testimonial-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
}

.testimonial-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 30px;
    font-style: italic;
    font-size: 1.1rem;
}

.testimonial-card .client-name {
    display: block;
    margin-top: 15px;
    font-style: normal;
    font-weight: 600;
    color: var(--primary-color);
}

/* --- FAQ Section --- */
.faq-item {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 10px;
    overflow: hidden;
}

.faq-item summary {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    padding: 20px;
    cursor: pointer;
    list-style: none; /* Remove default arrow */
    position: relative;
    padding-right: 40px;
}

/* Custom dropdown arrow */
.faq-item summary::after {
    content: '+';
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    color: var(--primary-color);
}

.faq-item[open] summary::after {
    content: '−';
}

.faq-item p {
    padding: 0 20px 20px 20px;
    margin-bottom: 0;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}

/* --- Contact Section --- */
#contact {
    text-align: center;
    background-color: var(--primary-color);
    color: var(--text-primary);
}

#contact h2 {
    color: var(--text-primary);
}
#contact p {
    font-size: 1.2rem;
    color: var(--text-primary);
}

/* --- Footer --- */
footer {
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 50px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 30px;
}

.footer-about h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
}

.footer-links h3 {
    color: var(--text-primary);
}

.footer-links ul {
    list-style: none;
}
.footer-links li {
    margin-bottom: 10px;
}
.footer-links a {
    color: var(--text-secondary);
}
.footer-links a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

/* --- Mobile Responsive --- */
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .nav-links { display: none; } /* Simplification for demo */
    
    .results-grid {
        grid-template-columns: 1fr 1fr;
    }
    .testimonial-grid {
        grid-template-columns: 1fr;
    }
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    .footer-links {
        margin-top: 20px;
    }
}