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

:root {
    --primary-color: #575756;
    --primary-dark: #3d3d3c;
    --secondary-color: #64748b;
    --text-color: #1e293b;
    --text-light: #64748b;
    --bg-color: #ffffff;
    --bg-light: #f8fafc;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px 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);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-light);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* SEO: Visually hidden but accessible to screen readers and search engines */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* Header */
header {
    background: white;
    color: var(--text-color);
    padding: 60px 0;
    text-align: center;
    box-shadow: var(--shadow);
}

.logo-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
}

.logo {
    height: 100px;
    width: auto;
    max-width: 100%;
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -0.02em;
}

.tagline {
    font-size: 1.25rem;
    color: var(--text-light);
    font-weight: 300;
}

/* Main Content */
main {
    flex: 1;
    padding: 60px 0;
}

.intro {
    text-align: center;
    margin-bottom: 50px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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

/* Brands Section */
.brands {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.brand-card {
    background: var(--bg-color);
    border-radius: 12px;
    padding: 40px 30px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    border: 1px solid var(--border-color);
}

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

.brand-icon {
    font-size: 3.5rem;
    margin-bottom: 20px;
    display: block;
}

.brand-logo {
    max-width: 100%;
    height: auto;
    max-height: 80px;
    width: auto;
    object-fit: contain;
}

.brand-card h3 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-color);
}

.brand-card p {
    color: var(--text-light);
    margin-bottom: 25px;
    line-height: 1.7;
    flex: 1;
}

.brand-link {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.3s ease;
    margin-top: auto;
}

.brand-link:hover {
    background-color: var(--primary-dark);
    transform: translateX(3px);
}

.brand-link:active {
    transform: translateX(1px);
}

/* Footer */
footer {
    background-color: var(--text-color);
    color: white;
    padding: 40px 0;
    margin-top: 60px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
    text-align: center;
}

.footer-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
    justify-items: center;
}

.footer-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9rem;
    opacity: 0.9;
}

.footer-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    stroke: currentColor;
    opacity: 0.9;
}

.footer-item span,
.footer-item a {
    color: white;
    text-decoration: none;
}

footer a {
    color: white;
    text-decoration: none;
    opacity: 0.9;
    transition: opacity 0.3s ease;
}

footer a:hover {
    opacity: 1;
    text-decoration: underline;
}

.footer-item:hover .footer-icon {
    opacity: 1;
}

footer p {
    opacity: 0.8;
    font-size: 0.9rem;
    margin: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .tagline {
        font-size: 1rem;
    }

    .brands {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .brand-card {
        padding: 30px 20px;
    }

    main {
        padding: 40px 0;
    }

    footer {
        padding: 30px 0;
    }

    .footer-info {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .footer-item {
        font-size: 0.85rem;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    header {
        padding: 40px 0;
    }

    header h1 {
        font-size: 1.75rem;
    }

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

    footer {
        padding: 25px 0;
    }

    .footer-item {
        font-size: 0.8rem;
    }

    .footer-icon {
        width: 18px;
        height: 18px;
    }
}