:root {
    --color-primary: #10b981;
    --color-primary-light: #34d399;
    --color-primary-dark: #059669;
    --color-text: #1f2937;
    --color-text-light: #6b7280;
    --color-text-lighter: #9ca3af;
    --color-bg: #ffffff;
    --color-bg-alt: #f9fafb;
    --color-border: #e5e7eb;
    --color-shadow: rgba(0, 0, 0, 0.04);
    --color-shadow-hover: rgba(0, 0, 0, 0.08);
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --color-text: #f9fafb;
    --color-text-light: #d1d5db;
    --color-text-lighter: #9ca3af;
    --color-bg: #111827;
    --color-bg-alt: #1f2937;
    --color-border: #374151;
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-shadow-hover: rgba(0, 0, 0, 0.5);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: 8px 16px;
    text-decoration: none;
    z-index: 1000;
    border-radius: 0 0 4px 0;
    opacity: 0;
    pointer-events: none;
}

.skip-link:focus {
    top: 0;
    opacity: 1;
    pointer-events: auto;
}

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

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    text-decoration: none;
}

.logo-icon {
    font-size: 2.5rem;
}

.nav {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link:focus {
    color: var(--color-primary-light);
    outline: 2px solid var(--color-primary-light);
    outline-offset: 4px;
    border-radius: 2px;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.theme-toggle {
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-md);
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: var(--spacing-md);
}

.theme-toggle:hover,
.theme-toggle:focus {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    outline: 2px solid var(--color-primary-light);
    outline-offset: 2px;
}

.theme-icon {
    font-size: 1.25rem;
    display: block;
    transition: transform 0.3s ease;
}

.theme-toggle:hover .theme-icon {
    transform: rotate(20deg);
}


/* Hero Section */
.hero {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

@media (max-width: 768px) {
    .hero-background {
        left: var(--spacing-md);
        right: var(--spacing-md);
        width: calc(100% - var(--spacing-md) * 2);
        border-radius: var(--radius-lg);
        overflow: hidden;
    }
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.5) 100%);
    z-index: 1;
}

.hero-container {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    width: 100%;
}

.hero-content {
    max-width: 700px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    background: rgba(31, 41, 55, 0.95);
    padding: var(--spacing-2xl) var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
}

.hero-brand {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 700;
    line-height: 1.1;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.hero-description {
    font-size: 1.375rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    padding: 0.875rem 1.75rem;
    font-size: 0.9375rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    font-family: inherit;
}

.btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--color-bg);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

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

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

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-2xl);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.section-description {
    font-size: 1.125rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

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

.value-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 16px var(--color-shadow);
    transition: var(--transition);
}

.value-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px var(--color-shadow-hover);
}

.value-image {
    width: 100%;
    height: 240px;
    overflow: hidden;
}

.value-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.value-card:hover .value-image img {
    transform: scale(1.1);
}

.value-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    margin: var(--spacing-lg) var(--spacing-lg) var(--spacing-sm);
    letter-spacing: -0.01em;
}

.value-text {
    font-size: 1rem;
    color: var(--color-text-light);
    line-height: 1.7;
    margin: 0 var(--spacing-lg) var(--spacing-lg);
}

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

.feature-card {
    background: var(--color-bg);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: 0 4px 16px var(--color-shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px var(--color-shadow-hover);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    display: inline-block;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

.feature-title {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.01em;
}

.feature-text {
    font-size: 1rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* Showcase */
.showcase {
    background: linear-gradient(135deg, var(--color-bg-alt) 0%, #1a2e1a 100%);
}

.showcase-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.showcase-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.showcase-description {
    font-size: 1.125rem;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.showcase-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.showcase-list li {
    font-size: 1rem;
    color: var(--color-text-light);
    padding-left: var(--spacing-lg);
    position: relative;
}

.showcase-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 600;
}

.showcase-images {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.showcase-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 1;
    box-shadow: 0 8px 24px var(--color-shadow);
    transition: var(--transition);
}

.showcase-image:first-child {
    grid-column: 1 / -1;
}

.showcase-image:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px var(--color-shadow-hover);
}

.showcase-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.showcase-image:hover img {
    transform: scale(1.1);
}

/* Tech Section */
.tech-section {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.tech-badges {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-top: var(--spacing-xl);
}

.tech-badge {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text);
    transition: var(--transition);
}

.tech-badge:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.tech-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border-bottom: 2px solid transparent;
}

.tech-link:hover,
.tech-link:focus {
    border-bottom-color: var(--color-primary);
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: 2px;
}

/* Footer */
.footer {
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-3xl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-text {
    font-size: 0.9375rem;
    color: var(--color-text-light);
}

.footer-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-link {
    font-size: 0.9375rem;
    color: var(--color-text-light);
    text-decoration: none;
    transition: var(--transition);
}

.footer-link:hover,
.footer-link:focus {
    color: var(--color-primary);
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: 2px;
}

.footer-separator {
    color: var(--color-text-lighter);
}

/* Responsive Design */
@media (max-width: 968px) {
    .hero {
        min-height: 70vh;
    }
    
    .hero-content {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
    
    .hero-description {
        font-size: 1.25rem;
    }
    
    .showcase-content {
        grid-template-columns: 1fr;
    }
    
    .showcase-images {
        order: -1;
    }
}

@media (max-width: 768px) {
    .hero {
        min-height: 60vh;
        padding: var(--spacing-md);
    }
    
    .hero-container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-content {
        padding: var(--spacing-lg) var(--spacing-md);
        margin: 0 auto;
    }
    
    .hero-brand {
        font-size: 1.125rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-description {
        font-size: 1.125rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .showcase-title {
        font-size: 2rem;
    }
    
    .values-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .nav {
        gap: var(--spacing-md);
    }
    
    .nav-link {
        font-size: 0.9375rem;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .header-container {
        padding: var(--spacing-md);
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .logo {
        font-size: 2rem;
    }
    
    .logo-icon {
        font-size: 2rem;
    }
    
    .hero {
        min-height: 50vh;
        padding: var(--spacing-sm);
    }
    
    .hero-container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-background {
        left: var(--spacing-sm);
        right: var(--spacing-sm);
        width: calc(100% - var(--spacing-sm) * 2);
    }
    
    .hero-content {
        padding: var(--spacing-md);
    }
    
    .hero-brand {
        font-size: 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .showcase-images {
        grid-template-columns: 1fr;
    }
    
    .showcase-image:first-child {
        grid-column: 1;
    }
}

/* Accessibility: Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Performance: Optimize image rendering */
img {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

/* Focus visible for better keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .header,
    .hero-actions,
    .footer {
        display: none;
    }
    
    .hero {
        min-height: auto;
        page-break-inside: avoid;
    }
    
    body {
        background: white;
        color: black;
    }
}