/* ===================================
   SONEXIS - Design System
   Minimal, Dark, Technical, Premium
   =================================== */

/* ===================================
   CSS Reset & Base Styles
   =================================== */

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

:root {
    /* Color Palette */
    --color-bg-primary: #0a0a0a;
    --color-bg-secondary: #141414;
    --color-bg-tertiary: #1a1a1a;
    --color-bg-card: #1e1e1e;
    
    --color-text-primary: #ffffff;
    --color-text-secondary: #b0b0b0;
    --color-text-tertiary: #808080;
    
    --color-accent: #00ff88;
    --color-accent-hover: #00cc6e;
    --color-accent-secondary: #00d4ff;
    
    --color-border: #2a2a2a;
    --color-border-light: #333333;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-xxl: 8rem;
    
    /* Layout */
    --container-width: 1200px;
    --border-radius: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* ===================================
   Typography
   =================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: var(--spacing-sm);
}

p {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-accent-hover);
}

/* ===================================
   Layout Components
   =================================== */

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

.section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
}

.section-intro {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-top: var(--spacing-sm);
}

.section-intro.bold {
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: 1.375rem;
}

/* ===================================
   Navigation
   =================================== */

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

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

.nav-logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--color-accent);
    display: flex;
    align-items: center;
}

.logo-img {
    height: 40px;
    width: auto;
    display: block;
}

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

.nav-links a {
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--color-text-primary);
}

.nav-links .nav-cta {
    background: var(--color-accent);
    color: var(--color-bg-primary);
    padding: 0.5rem 1.25rem;
    border-radius: var(--border-radius);
    font-weight: 600;
}

.nav-links .nav-cta:hover {
    background: var(--color-accent-hover);
    color: var(--color-bg-primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: var(--transition);
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 255, 136, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 212, 255, 0.08) 0%, transparent 50%);
    z-index: -1;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

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

/* ===================================
   Buttons
   =================================== */

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    transition: var(--transition);
    cursor: pointer;
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--color-accent);
    color: var(--color-bg-primary);
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    color: var(--color-bg-primary);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 255, 136, 0.3);
}

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

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

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.125rem;
}

/* ===================================
   Grid Layouts
   =================================== */

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

/* ===================================
   Cards
   =================================== */

.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: var(--transition);
}

.card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.card h3 {
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.card p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

.card-list {
    list-style: none;
    margin-top: var(--spacing-sm);
}

.card-list li {
    color: var(--color-text-secondary);
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    font-size: 0.95rem;
}

.card-list li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

/* ===================================
   What We Do Section
   =================================== */

.what-we-do {
    background: var(--color-bg-secondary);
}

/* ===================================
   Why Different Section
   =================================== */

.why-different {
    background: var(--color-bg-primary);
}

.difference-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.difference-item {
    background: var(--color-bg-card);
    border-left: 3px solid var(--color-accent);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
}

.difference-item h3 {
    color: var(--color-accent);
    font-size: 1.375rem;
    margin-bottom: var(--spacing-sm);
}

.difference-item p {
    color: var(--color-text-secondary);
    font-size: 1.05rem;
}

/* ===================================
   Who It's For Section
   =================================== */

.who-its-for {
    background: var(--color-bg-secondary);
}

.audience-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: var(--transition);
}

.audience-card:hover {
    border-color: var(--color-accent-secondary);
    transform: translateY(-4px);
}

.audience-card h3 {
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.5rem;
}

.audience-card p {
    color: var(--color-text-secondary);
}

/* ===================================
   Sample & Custom Data Section
   =================================== */

.sample-custom {
    background: var(--color-bg-primary);
}

.split-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.split-content {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
}

.split-content h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.split-content p {
    margin-bottom: var(--spacing-md);
}

.feature-list {
    list-style: none;
    margin: var(--spacing-md) 0;
}

.feature-list li {
    color: var(--color-text-secondary);
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    font-size: 1.05rem;
}

.feature-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
    font-size: 1.25rem;
}

/* ===================================
   Ethics Section
   =================================== */

.ethics {
    background: var(--color-bg-secondary);
}

.ethics-content {
    max-width: 1000px;
    margin: 0 auto;
}

.ethics-intro {
    text-align: center;
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.ethics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.ethics-item {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
}

.ethics-item h3 {
    color: var(--color-accent);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.ethics-item p {
    color: var(--color-text-secondary);
}

.ethics-footer {
    text-align: center;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

/* ===================================
   Contact Section
   =================================== */

.contact {
    background: var(--color-bg-primary);
    padding: var(--spacing-xxl) 0;
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
}

.contact-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.contact-header h2 {
    font-size: 3rem;
}

.contact-header p {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
}

.contact-note {
    font-size: 1rem !important;
    color: var(--color-accent) !important;
    font-weight: 600;
    margin-top: var(--spacing-sm);
}

/* ===================================
   Form Styles
   =================================== */

.contact-form {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    color: var(--color-text-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 0.875rem;
    color: var(--color-text-primary);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 255, 136, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-footer {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--color-text-tertiary);
    font-size: 0.9rem;
    margin-top: var(--spacing-sm);
}

.form-success {
    display: none;
    background: var(--color-bg-card);
    border: 2px solid var(--color-accent);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    text-align: center;
}

.form-success.active {
    display: block;
}

.form-success h3 {
    color: var(--color-accent);
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.form-success p {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
}

/* ===================================
   Footer
   =================================== */

.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.footer-logo-img {
    height: 50px;
    width: auto;
    display: block;
}

.footer-brand p {
    color: var(--color-text-tertiary);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.footer-column h4 {
    color: var(--color-text-primary);
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
}

.footer-column a {
    display: block;
    color: var(--color-text-tertiary);
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--color-accent);
    padding-left: 0.5rem;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    color: var(--color-text-tertiary);
    font-size: 0.9rem;
}

.footer-legal {
    display: flex;
    gap: var(--spacing-md);
}

.footer-legal a {
    color: var(--color-text-tertiary);
    font-size: 0.9rem;
}

.footer-legal a:hover {
    color: var(--color-accent);
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 968px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg-secondary);
        flex-direction: column;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .split-section {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
        --spacing-xxl: 5rem;
    }
    
    .section {
        padding: var(--spacing-lg) 0;
    }
    
    .hero {
        min-height: 90vh;
    }
    
    .contact-form {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

/* ===================================
   Animations
   =================================== */

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

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

/* ===================================
   Utility Classes
   =================================== */

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

.text-accent {
    color: var(--color-accent);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

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