:root {
    --background: #0D0D0D;
    --surface: #1A1A1A;
    --primary-text: #F5F5F5;
    --secondary-text: #A3A3A3;
    --accent: #00F57A;
    --accent-dark: #00B359;
    --border-color: #262626;

    --font-sans: 'Inter', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--background);
    color: var(--primary-text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

section {
    padding: 80px 0;
    animation: fadeIn 0.8s ease-out forwards;
}

/* Header */
.header {
    background: rgba(13, 13, 13, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

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

.logo {
    font-weight: 900;
    font-size: 1.8rem;
    color: var(--accent);
}

/* CTA Button */
.cta-button {
    display: inline-block;
    background-color: var(--accent);
    color: var(--background);
    padding: 12px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.3s ease, transform 0.3s ease;
    border: 2px solid var(--accent);
}

.cta-button:hover {
    background-color: var(--accent-dark);
    border-color: var(--accent-dark);
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 120px 0;
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.1;
    max-width: 800px;
    margin: 0 auto 20px;
}

.hero-title .highlight {
    color: var(--accent);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--secondary-text);
    max-width: 600px;
    margin: 0 auto 40px;
}

.hero-cta {
    padding: 16px 40px;
    font-size: 1.1rem;
}

/* Shared Section Styles */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--secondary-text);
    text-align: center;
    margin-bottom: 60px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* Challenge Section */
.challenge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.challenge-card {
    background-color: var(--surface);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.challenge-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--accent);
}

.challenge-card p {
    color: var(--secondary-text);
}


/* Services Section */
.services {
    background-color: var(--surface);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: var(--background);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 245, 122, 0.05);
}

.service-card .service-price {
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    flex-grow: 1;
}

.service-card p {
    color: var(--secondary-text);
}

/* Clients Section */
.logo-wall {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 40px;
    filter: grayscale(100%) brightness(1.5);
}

.client-logo {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--secondary-text);
    opacity: 0.8;
    transition: opacity 0.3s ease, filter 0.3s ease;
}

.client-logo:hover {
    opacity: 1;
}

/* Vision Section */
.vision {
    background-color: var(--background);
    text-align: center;
}

.vision blockquote {
    font-size: 1.8rem;
    font-weight: 500;
    line-height: 1.5;
    max-width: 800px;
    margin: 0 auto;
    border-left: 4px solid var(--accent);
    padding-left: 40px;
    text-align: left;
    color: var(--primary-text);
}

/* Footer */
.footer {
    background-color: var(--surface);
    text-align: center;
    padding: 60px 0;
    border-top: 1px solid var(--border-color);
}

.footer h2 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.footer p {
    color: var(--secondary-text);
    margin-bottom: 30px;
}

.footer-info {
    margin-top: 40px;
    font-size: 0.9rem;
    color: var(--secondary-text);
    opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.8rem;
    }
    .section-title {
        font-size: 2rem;
    }
    .header .container {
        flex-direction: column;
        gap: 15px;
    }
}

@media (max-width: 480px) {
     section {
        padding: 60px 0;
    }
    .hero-title {
        font-size: 2.2rem;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
    .cta-button {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    .hero-cta {
        padding: 14px 30px;
    }
}