:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #64748b;
    --background: #ffffff;
    --background-alt: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-blue: linear-gradient(135deg, #2563eb 0%, #3b82f6 50%, #60a5fa 100%);
}

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

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: var(--gradient-blue);
    color: white;
    padding: 1.5rem 0;
    box-shadow: var(--shadow-lg);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.nav-list {
    display: flex;
    list-style: none;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    margin: 0;
}

.nav-list a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s ease;
    padding: 0.25rem 0;
}

.nav-list a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

/* Main Content */
.main {
    min-height: calc(100vh - 200px);
    padding: 3rem 0;
}

.intro {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 0;
}

.intro h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.intro p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
}

/* Companies Section */
.companies {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.company-card {
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.company-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-light);
}

.company-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.company-card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    flex-grow: 1;
}

.company-url {
    color: var(--primary-color);
    font-weight: 500;
    word-break: break-all;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

/* Testimonials Section */
.testimonials {
    margin-top: 4rem;
    padding: 3rem 0;
    background: var(--background-alt);
    border-radius: 12px;
}

.testimonials-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.testimonial-card {
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-light);
}

.testimonial-text {
    color: var(--text-secondary);
    margin-bottom: 0;
    flex-grow: 1;
    line-height: 1.8;
}

.testimonial-text a {
    color: var(--primary-color);
    font-weight: 500;
    text-decoration: none;
    transition: color 0.3s ease;
}

.testimonial-text a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Category Page Styles */
.category-intro {
    background: var(--background-alt);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
}

.category-intro h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.category-intro p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.category-content {
    margin-top: 2rem;
}

.category-content h2 {
    font-size: 2rem;
    margin: 2rem 0 1rem;
    color: var(--text-primary);
}

.category-content h3 {
    font-size: 1.5rem;
    margin: 1.5rem 0 0.75rem;
    color: var(--primary-color);
}

.category-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.category-content ul {
    margin: 1rem 0;
    padding-left: 2rem;
}

.category-content li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    line-height: 1.8;
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
}

.footer p {
    margin: 0;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .companies {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: 1.5rem;
    }

    .testimonials-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav-list {
        flex-direction: column;
        gap: 0.75rem;
        width: 100%;
    }

    .logo {
        font-size: 1.25rem;
    }

    .intro h2 {
        font-size: 2rem;
    }

    .intro p {
        font-size: 1rem;
    }

    .companies {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .company-card {
        padding: 1.5rem;
    }

    .testimonials {
        margin-top: 3rem;
        padding: 2rem 0;
    }

    .testimonials-title {
        font-size: 2rem;
        margin-bottom: 2rem;
    }

    .testimonials-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .testimonial-card {
        padding: 1.5rem;
    }

    .category-intro h1 {
        font-size: 2rem;
    }

    .category-content h2 {
        font-size: 1.75rem;
    }

    .main {
        padding: 2rem 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .intro h2 {
        font-size: 1.75rem;
    }

    .company-card {
        padding: 1.25rem;
    }

    .category-intro {
        padding: 1.5rem;
    }

    .category-intro h1 {
        font-size: 1.75rem;
    }

    .testimonials-title {
        font-size: 1.75rem;
    }

    .testimonial-card {
        padding: 1.25rem;
    }
}