/* Root Variables */
:root {
    --color-charcoal: #2D3748;
    --color-charcoal-light: #4A5568;
    --color-mint: #48BB78;
    --color-mint-light: #68D391;
    --color-cobalt: #3182CE;
    --color-cobalt-light: #4299E1;
    --color-white: #FFFFFF;
    --color-gray-50: #F7FAFC;
    --color-gray-100: #EDF2F7;
    --color-gray-200: #E2E8F0;
    --color-gray-300: #CBD5E0;
    --color-gray-500: #A0AEC0;
    --color-gray-700: #4A5568;
    --color-gray-900: #1A202C;
    
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;
    
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    
    --border-radius: 8px;
    --border-radius-lg: 12px;
    
    --shadow-sm: 0 1px 2px 0 rgba(45, 55, 72, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(45, 55, 72, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(45, 55, 72, 0.1);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-charcoal);
    background-color: var(--color-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1 {
    font-size: 2.75rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
}

h2 {
    font-size: 2.25rem;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
}

h4 {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-gray-700);
}

/* Header */
.header {
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    padding: var(--spacing-lg) 0;
}

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

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo {
    width: 40px;
    height: 40px;
}

.brand-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-charcoal);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--border-radius);
    border: 2px solid transparent;
    cursor: pointer;
    min-width: 120px;
}

.btn-primary {
    background-color: var(--color-cobalt);
    color: var(--color-white);
    border-color: var(--color-cobalt);
}

.btn-primary:hover {
    background-color: var(--color-cobalt-light);
    border-color: var(--color-cobalt-light);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-charcoal);
    border-color: var(--color-charcoal);
}

.btn-secondary:hover {
    background-color: var(--color-charcoal);
    color: var(--color-white);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-gray-50) 0%, var(--color-gray-100) 100%);
    padding: var(--spacing-3xl) 0 var(--spacing-2xl) 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.hero-title {
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-xl);
    font-size: 2.5rem;
    line-height: 1.2;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
    align-items: center;
}

/* Sections */
.section {
    padding: var(--spacing-3xl) 0;
}

.centered-section {
    text-align: center;
}

.centered-section .section-header,
.centered-section .features-grid,
.centered-section .program-grid,
.centered-section .docs-grid,
.centered-section .products-grid,
.centered-section .integration-content,
.centered-section .assessment-content,
.centered-section .certification-content {
    text-align: center;
}

.centered-section .feature-card,
.centered-section .program-card,
.centered-section .product-card {
    text-align: center;
}

.section-alt {
    background-color: var(--color-gray-50);
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl) auto;
}

.section-header h2 {
    color: var(--color-charcoal);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--color-gray-700);
}

/* Feature Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.feature-card {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.feature-icon {
    margin-bottom: var(--spacing-lg);
}

.feature-card h3 {
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-md);
}

/* Program Grid */
.program-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-xl);
}

.program-card {
    background-color: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.program-image-placeholder,
.program-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--border-radius-lg);
}

.program-image-placeholder {
    background-color: var(--color-gray-200);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gray-500);
    font-weight: 600;
}

.placeholder-text {
    color: var(--color-gray-500);
    font-weight: 600;
    font-size: 1rem;
}

.program-content {
    padding: var(--spacing-xl);
}

.program-content h3 {
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-md);
}

.program-features {
    list-style: none;
    margin-top: var(--spacing-md);
}

.program-features li {
    padding: var(--spacing-xs) 0;
    color: var(--color-gray-700);
}

.program-features li::before {
    content: "✓";
    color: var(--color-mint);
    font-weight: bold;
    margin-right: var(--spacing-sm);
}

/* Documentation Grid */
.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.doc-item {
    text-align: center;
}

.doc-icon {
    margin-bottom: var(--spacing-lg);
}

.doc-item h4 {
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-sm);
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.product-card {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    border: 2px solid var(--color-gray-200);
}

.product-card h3 {
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-md);
}

.product-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-cobalt);
    margin: var(--spacing-lg) 0;
}

/* Integration Content */
.integration-content {
    display: grid;
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-3xl);
    align-items: center;
}

.integration-image-placeholder {
    height: 300px;
    background-color: var(--color-gray-200);
    width: 100%;
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gray-500);
    font-weight: 600;
}

.integration-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: var(--border-radius-lg);
}

.integration-item {
    margin-bottom: var(--spacing-xl);
}

.integration-item h4 {
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-sm);
}

/* Assessment Content */
.assessment-content {
    max-width: 800px;
    margin: 0 auto;
}

.assessment-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.assessment-item {
    text-align: center;
}

.assessment-icon {
    margin-bottom: var(--spacing-lg);
}

.assessment-item h4 {
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-sm);
}

/* Certification Content */
.certification-content {
    max-width: 800px;
    margin: 0 auto;
}

.certification-levels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
}

.cert-level {
    text-align: center;
    padding: var(--spacing-xl);
    background-color: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.cert-level h4 {
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-sm);
}

.cert-badge {
    margin: var(--spacing-lg) auto 0 auto;
}

/* Contacts */
.contacts {
    background-color: var(--color-charcoal);
    color: var(--color-white);
}

.contacts .section-header h2,
.contacts .section-header p {
    color: var(--color-white);
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    max-width: 800px;
    margin: 0 auto;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    text-align: left;
}

.contact-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-details h4 {
    color: var(--color-white);
    margin-bottom: var(--spacing-xs);
}

.contact-details p {
    color: var(--color-gray-300);
    margin-bottom: 0;
}

/* Footer */
.footer {
    background-color: var(--color-gray-900);
    color: var(--color-white);
    padding: var(--spacing-3xl) 0 var(--spacing-lg) 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.footer-brand .logo-section {
    margin-bottom: var(--spacing-md);
    justify-content: center;
}

.footer-brand .brand-name {
    color: var(--color-white);
}

.footer-description {
    color: var(--color-gray-300);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.1rem;
    line-height: 1.6;
}

.footer-section h4 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.footer-section ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-lg);
}

.footer-section ul li {
    margin: 0;
}

.footer-section ul li a {
    color: var(--color-gray-300);
    text-decoration: none;
    font-size: 1rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
}

.footer-section ul li a:hover {
    color: var(--color-mint);
    background-color: rgba(72, 187, 120, 0.1);
}

.footer-bottom {
    border-top: 1px solid var(--color-gray-700);
    padding-top: var(--spacing-lg);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-gray-300);
    margin: 0;
    font-size: 0.95rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .hero {
        padding: var(--spacing-2xl) 0 var(--spacing-xl) 0;
    }
    
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .hero-cta {
        gap: var(--spacing-md);
    }
    
    .hero-description {
        font-size: 1.1rem;
        margin-bottom: var(--spacing-xl);
        padding: 0 var(--spacing-sm);
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .features-grid,
    .program-grid,
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .integration-content {
        gap: var(--spacing-xl);
    }
    
    .footer-content {
        gap: var(--spacing-xl);
    }
    
    .footer-section ul {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: center;
    }
    
    .contact-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .certification-levels {
        grid-template-columns: 1fr;
    }
    
    .program-grid {
        grid-template-columns: 1fr;
    }
    
    .program-card {
        min-width: unset;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-md);
    }
}