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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Instrument Sans', sans-serif;
    line-height: 1.6;
    color: #ffffff;
    background-color: #171717;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* CSS Custom Properties (Variables) */
:root {
    /* Colors */
    --color-primary: #2944ff;
    --color-primary-hover: #6679ff;
    --color-accent-green: #00ff88;
    --color-neutral-primary: #171717;
    --color-neutral-inverse: #ffffff;
    --color-text-primary: #ffffff;
    --color-text-secondary: rgba(255, 255, 255, 0.7);
    --color-text-muted: rgba(255, 255, 255, 0.5);
    --color-background: #171717;
    --color-border: rgba(255, 255, 255, 0.1);
    
    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Instrument Sans', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;
    --spacing-xxxl: 8rem;
    
    /* Container */
    --container-width: 1280px;
    --container-padding: 1rem;
    
    /* Breakpoints */
    --bp-mobile: 768px;
    --bp-tablet: 1024px;
    
    /* Border radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

/* Container */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(23, 23, 23, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-decoration: none;
    color: inherit;
    height: 2.5rem;
    transition: opacity 0.3s ease;
}

.nav-logo:hover {
    opacity: 0.8;
}

.nav-logo-icon {
    width: 1.75rem;
    height: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-brand-name {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-text-primary);
}

.nav-mobile-menu-button {
    display: none;
    width: 2.5rem;
    height: 2.5rem;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.nav-mobile-menu-button:hover {
    opacity: 0.7;
}

.hamburger-icon {
    width: 1.5rem;
    height: 1.5rem;
}

/* Hero Section */
.hero-section {
    padding: 5rem 0 var(--spacing-xl);
    margin-top: 4rem;
    min-height: 60vh;
    display: flex;
    align-items: center;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    width: 100%;
}

.hero-content {
    text-align: left;
    max-width: none;
    margin: 0;
    padding-right: var(--spacing-lg);
}

/* Hero Visualization Section */
.hero-visualization {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 500px;
    padding: var(--spacing-sm);
}

.network-canvas {
    width: 100%;
    height: 500px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 5vw, 5.65rem);
    font-weight: 500;
    line-height: 1.04;
    letter-spacing: -0.01em;
    margin-bottom: 0.3em;
    color: var(--color-text-primary);
    text-wrap: balance;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.13rem);
    line-height: 1.6;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    text-wrap: balance;
}

.button-group {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-start;
    flex-wrap: wrap;
}

/* Buttons */
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1em 1.5em;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    min-width: 140px;
}

.button-primary {
    background-color: var(--color-primary);
    color: var(--color-neutral-inverse);
}

.button-primary:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(41, 68, 255, 0.3);
}

.button-secondary {
    background-color: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.button-secondary:hover {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* Logos Section */
.logos-section {
    padding: var(--spacing-xl) 0;
}

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

.logos-text {
    max-width: 500px;
}

.logos-title {
    font-family: var(--font-heading);
    font-size: clamp(1.75rem, 3vw, 2rem);
    font-weight: 500;
    line-height: 1.04;
    letter-spacing: -0.01em;
    margin-bottom: 0.5em;
    color: var(--color-text-primary);
    text-wrap: balance;
}

.logos-subtitle {
    font-size: 1.13rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
    text-wrap: balance;
}

.logos-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
    align-items: center;
    max-width: 600px;
    margin: 0 auto;
}

.logo {
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.6;
    transition: opacity 0.3s ease;
    padding: var(--spacing-sm);
}

.logo:hover {
    opacity: 0.9;
}

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

/* Image logo styling */
.logo-image {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 120px;
    padding: 20px;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: background-color 0.3s ease, border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.logo-img {
    max-width: 100%;
    max-height: 80px;
    width: auto;
    height: auto;
    object-fit: contain;
    /* Make logos more prominent with higher opacity */
    opacity: 0.85;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.logo-image:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.logo-image:hover .logo-img {
    opacity: 1;
    transform: scale(1.08);
}

/* Contact Section */
.contact-section {
    padding: var(--spacing-xl) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
}

.contact-content {
    max-width: 600px;
}

.eyebrow {
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 0.01em;
    line-height: 1.3;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.contact-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 2.83rem);
    font-weight: 500;
    line-height: 1.04;
    letter-spacing: -0.01em;
    color: var(--color-text-primary);
    text-wrap: balance;
}

.contact-email {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.3s ease;
    border-bottom: 1px solid transparent;
}

.contact-email:hover {
    color: var(--color-primary-hover);
    border-bottom-color: var(--color-primary-hover);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content > * {
    animation: fadeInUp 0.8s ease forwards;
}

.hero-title {
    animation-delay: 0.1s;
}

.hero-subtitle {
    animation-delay: 0.2s;
}

.button-group {
    animation-delay: 0.3s;
}

/* Responsive Design */
@media (max-width: 1024px) {
    :root {
        --container-padding: 2rem;
    }
    
    .hero-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .hero-content {
        text-align: center;
        padding-right: 0;
        margin-bottom: var(--spacing-md);
    }
    
    .button-group {
        justify-content: center;
    }
    
    .hero-visualization {
        min-height: 400px;
    }
    
    .network-canvas {
        height: 400px;
    }
    
    .logos-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .logos-container {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
        max-width: 500px;
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 1.5rem;
    }
    
    .nav-mobile-menu-button {
        display: flex;
    }
    
    .hero-section {
        padding: 4rem 0 var(--spacing-lg);
        margin-top: 4rem;
        min-height: auto;
    }
    
    .hero-visualization {
        min-height: 350px;
        margin-top: var(--spacing-sm);
    }
    
    .network-canvas {
        height: 350px;
    }
    
    .button-group {
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }
    
    .button {
        width: 100%;
        max-width: 280px;
    }
    
    .logos-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        max-width: 300px;
    }
    
    .logo {
        height: 1.5rem;
    }
    
    .logos-section,
    .contact-section {
        padding: var(--spacing-lg) 0;
    }
}

@media (max-width: 480px) {
    :root {
        --container-padding: 1rem;
    }
    
    .hero-section {
        padding: 4rem 0 var(--spacing-lg);
    }
    
    .nav-brand-name {
        font-size: 1rem;
    }
    
    .nav-logo-icon {
        width: 1.5rem;
        height: 1.5rem;
    }
}

/* Smooth transitions */
* {
    transition: color 0.3s ease, background-color 0.3s ease, border-color 0.3s ease, opacity 0.3s ease;
}

/* Focus states for accessibility */
.button:focus,
.nav-logo:focus,
.nav-mobile-menu-button:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Selection styling */
::selection {
    background-color: var(--color-primary);
    color: white;
}

/* Utility classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}