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

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

:root {
    /* Colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-tertiary: #707070;
    
    /* Brand Colors */
    --purple: #8B5CF6;
    --purple-light: #A78BFA;
    --purple-dark: #7C3AED;
    --pink: #EC4899;
    --orange: #FB923C;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--purple) 0%, var(--pink) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--orange) 0%, var(--pink) 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.875rem;
    --font-size-sm: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.5rem;
    --font-size-xl: 2rem;
    --font-size-2xl: 3rem;
    --font-size-3xl: 4rem;
    
    /* Effects */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.3);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--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: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-3xl);
}

h2 {
    font-size: var(--font-size-2xl);
}

h3 {
    font-size: var(--font-size-xl);
}

p {
    margin-bottom: var(--spacing-sm);
}

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

/* ============================================
   Container & Layout
   ============================================ */

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

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

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

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: background var(--transition-normal);
}

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

.logo {
    font-size: var(--font-size-lg);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-links a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

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

.cta-button,
.primary-button,
.secondary-button,
.submit-button {
    padding: 0.875rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    display: inline-block;
}

.cta-button,
.primary-button,
.submit-button {
    background: var(--gradient-primary);
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
}

.cta-button:hover,
.primary-button:hover,
.submit-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.secondary-button {
    background: transparent;
    border: 2px solid var(--purple);
    color: var(--purple);
}

.secondary-button:hover {
    background: var(--purple);
    color: var(--text-primary);
}

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

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    max-width: 900px;
    z-index: 1;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-tertiary);
    font-size: var(--font-size-xs);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(10px);
    }
}

/* ============================================
   Section Headers
   ============================================ */

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

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

.section-label {
    display: inline-block;
    color: var(--purple);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 0;
}

/* ============================================
   Feature Sections
   ============================================ */

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

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

.feature-content.reverse {
    direction: rtl;
}

.feature-content.reverse > * {
    direction: ltr;
}

.feature-text {
    max-width: 600px;
}

.feature-description {
    font-size: var(--font-size-md);
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.large-text {
    font-size: var(--font-size-lg);
    color: var(--text-primary);
    font-weight: 500;
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: rgba(139, 92, 246, 0.05);
    border-radius: 0.5rem;
    border: 1px solid rgba(139, 92, 246, 0.1);
    transition: all var(--transition-fast);
}

.feature-item:hover {
    background: rgba(139, 92, 246, 0.1);
    border-color: rgba(139, 92, 246, 0.3);
    transform: translateX(5px);
}

.feature-icon {
    font-size: var(--font-size-lg);
}

/* ============================================
   Visual Placeholders
   ============================================ */

.feature-visual {
    position: relative;
}

.visual-placeholder {
    background: var(--bg-secondary);
    border-radius: 1rem;
    padding: var(--spacing-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.interface-screenshot {
    width: 100%;
    height: auto;
    border-radius: 0.5rem;
    display: block;
}

/* Waveform Demo Specific */
.waveform-section .visual-placeholder {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(236, 72, 153, 0.1) 100%);
    border: 1px solid rgba(139, 92, 246, 0.3);
}

.demo-canvas {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 0.5rem;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

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

.waveform-path {
    animation: drawWave 3s ease-in-out infinite;
}

@keyframes drawWave {
    0%, 100% {
        d: path('M 0 150 Q 100 50, 200 150 T 400 150 T 600 150 T 800 150');
    }
    50% {
        d: path('M 0 150 Q 100 250, 200 150 T 400 150 T 600 150 T 800 150');
    }
}

.demo-caption {
    text-align: center;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* ============================================
   Integration/Feedback Loop Section
   ============================================ */

.integration-section {
    background: var(--bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.integration-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.integration-text {
    max-width: 800px;
    margin: 0 auto;
}

.highlight {
    color: var(--text-primary);
    font-weight: 600;
    font-size: var(--font-size-lg);
    text-align: center;
    padding: var(--spacing-md);
    background: rgba(139, 92, 246, 0.1);
    border-radius: 0.5rem;
    border-left: 4px solid var(--purple);
}

.feedback-loop {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    flex-wrap: wrap;
}

.loop-step {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: 1rem;
    text-align: center;
    min-width: 200px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.loop-step:hover {
    border-color: var(--purple);
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.step-number {
    display: inline-block;
    width: 40px;
    height: 40px;
    line-height: 40px;
    background: var(--gradient-primary);
    border-radius: 50%;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.loop-step h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.loop-step p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin: 0;
}

.loop-arrow {
    font-size: var(--font-size-2xl);
    color: var(--purple);
}

.loop-arrow-return {
    width: 100%;
    text-align: center;
}

/* ============================================
   Use Cases Section
   ============================================ */

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

.use-case-card {
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.use-case-card:hover {
    border-color: var(--purple);
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

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

.use-case-card h3 {
    margin-bottom: var(--spacing-md);
}

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

.card-list li {
    color: var(--text-secondary);
    padding-left: var(--spacing-md);
    position: relative;
}

.card-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--purple);
}

/* ============================================
   Technical Specs Section
   ============================================ */

.specs-section {
    background: var(--bg-secondary);
}

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

.spec-category {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.spec-category h3 {
    color: var(--purple);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-lg);
}

.spec-category p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin: 0;
}

/* ============================================
   Research Section
   ============================================ */

.research-section {
    padding: var(--spacing-xl) 0;
    text-align: center;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.05) 0%, rgba(236, 72, 153, 0.05) 100%);
    border-top: 1px solid rgba(139, 92, 246, 0.2);
    border-bottom: 1px solid rgba(139, 92, 246, 0.2);
}

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

.research-subtitle {
    font-size: var(--font-size-md);
    color: var(--text-secondary);
    margin: var(--spacing-md) 0;
    line-height: 1.8;
}

.research-cta {
    margin-top: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.research-note {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    margin: 0;
    font-style: italic;
}

/* ============================================
   Access/CTA Section
   ============================================ */

.access-section {
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.access-content {
    max-width: 600px;
    margin: 0 auto;
}

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

.access-subtitle {
    font-size: var(--font-size-md);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

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

.form-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.email-input {
    flex: 1;
    padding: 0.875rem 1.5rem;
    background: var(--bg-secondary);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 0.5rem;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    font-family: var(--font-family);
    transition: border-color var(--transition-fast);
}

.email-input:focus {
    outline: none;
    border-color: var(--purple);
}

.email-input::placeholder {
    color: var(--text-tertiary);
}

.form-disclaimer {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    margin: 0;
}

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

.footer {
    background: var(--bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg) 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-brand h3 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

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

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

.footer-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

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

.footer-column a {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--purple);
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-tertiary);
    font-size: var(--font-size-xs);
    margin: 0;
}

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

@media (max-width: 1024px) {
    :root {
        --spacing-xl: 4rem;
    }
    
    .feature-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .feature-content.reverse {
        direction: ltr;
    }
    
    .feedback-loop {
        flex-direction: column;
    }
    
    .loop-arrow {
        transform: rotate(90deg);
    }
    
    .loop-arrow-return {
        transform: rotate(0deg);
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 3rem;
    }
    
    .nav-links {
        gap: var(--spacing-sm);
    }
    
    .nav-links a {
        font-size: var(--font-size-xs);
    }
    
    .hero {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }
    
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
    
    .specs-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        flex-direction: column;
    }
    
    .form-group {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .scroll-indicator {
        display: none;
    }
}

/* ============================================
   Animations & Utilities
   ============================================ */

.fade-in {
    opacity: 0;
    animation: fadeIn 0.8s ease forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

.slide-up {
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 0.8s ease forwards;
}

@keyframes slideUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Smooth scrolling for all anchor links */
html {
    scroll-padding-top: 80px;
}