/* ===================================
   PersonaLive Landing Page Styles
   =================================== */

/* CSS Variables */
:root {
    /* Rainbow gradient colors */
    --color-red: #FF6B6B;
    --color-orange: #FF9E42;
    --color-yellow: #F0C330;
    --color-green: #6BCB77;
    --color-blue: #4D96FF;
    --color-purple: #9D78E3;
    
    /* Gradients */
    --gradient-rainbow: linear-gradient(90deg, 
        var(--color-red), 
        var(--color-orange), 
        var(--color-yellow), 
        var(--color-green), 
        var(--color-blue), 
        var(--color-purple),
        var(--color-red)
    );
    
    /* Background colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a2e;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    
    /* Text colors */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.75);
    --text-muted: rgba(255, 255, 255, 0.5);
    
    /* Accent colors */
    --accent-blue: #4D96FF;
    --accent-purple: #9D78E3;
    
    /* Spacing */
    --section-padding: 100px;
    --container-max: 1200px;
    
    /* Border radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* Rainbow Text */
.rainbow-text {
    background: var(--gradient-rainbow);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 900;
}

.rainbow-text-animated {
    background: var(--gradient-rainbow);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: rainbow-flow 4s linear infinite;
    font-weight: 900;
}

@keyframes rainbow-flow {
    0% { background-position: 0% center; }
    100% { background-position: -200% center; }
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

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

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

.nav-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-fast);
}

.nav-btn:hover {
    background: var(--bg-card-hover);
    border-color: rgba(255, 255, 255, 0.2);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

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

/* ===================================
   Hero Section
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 120px 24px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 20%, rgba(157, 120, 227, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(77, 150, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(255, 107, 107, 0.1) 0%, transparent 50%);
    z-index: -1;
}

.hero-content {
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

.hero-title {
    font-size: clamp(3rem, 10vw, 6rem);
    line-height: 1.1;
    margin-bottom: 20px;
    filter: drop-shadow(0 4px 20px rgba(255, 107, 107, 0.3));
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 40px;
}

.hero-description strong {
    color: var(--text-primary);
    background: var(--gradient-rainbow);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    margin-bottom: 60px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-purple), var(--color-blue));
    color: white;
    box-shadow: 0 4px 20px rgba(77, 150, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(77, 150, 255, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--color-orange), var(--color-red));
    color: white;
    box-shadow: 0 4px 20px rgba(255, 107, 107, 0.3);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(255, 107, 107, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.4);
}

/* Hero Demo */
.hero-demo {
    max-width: 800px;
    margin: 0 auto;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(255, 255, 255, 0.1);
}

.hero-demo-gif {
    width: 100%;
    display: block;
}

/* ===================================
   Highlights Section
   =================================== */
.highlights {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
}

.highlights-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.highlight-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    transition: all var(--transition-normal);
}

.highlight-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
}

.highlight-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.highlight-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
    background: var(--gradient-rainbow);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.highlight-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===================================
   Section Common Styles
   =================================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: clamp(2rem, 5vw, 2.75rem);
    font-weight: 800;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===================================
   Demo Section
   =================================== */
.demo-section {
    padding: var(--section-padding) 0;
    background: var(--bg-primary);
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.demo-item {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-normal);
}

.demo-item:hover {
    transform: scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.demo-item img {
    width: 100%;
    display: block;
}

.demo-item.featured {
    grid-column: span 1;
}

/* ===================================
   Framework Section
   =================================== */
.framework-section {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
}

.framework-content {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.framework-image {
    width: 100%;
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.framework-description {
    max-width: 800px;
    margin: 0 auto;
}

.framework-description p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 24px;
}

.framework-description ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.framework-description li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.framework-description li::before {
    content: '✦';
    color: var(--color-purple);
}

.framework-description strong {
    color: var(--text-primary);
}

/* ===================================
   Features Section
   =================================== */
.features-section {
    padding: var(--section-padding) 0;
    background: var(--bg-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all var(--transition-normal);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-4px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===================================
   Getting Started Section
   =================================== */
.getting-started-section {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
}

.steps-container {
    display: flex;
    flex-direction: column;
    gap: 32px;
    margin-bottom: 60px;
}

.step {
    display: flex;
    gap: 24px;
    align-items: flex-start;
}

.step-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-purple), var(--color-blue));
    border-radius: 50%;
    font-size: 1.25rem;
    font-weight: 700;
}

.step-content {
    flex: 1;
}

.step-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.step-content pre {
    background: var(--bg-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: 20px;
    overflow-x: auto;
    margin-bottom: 16px;
}

.step-content code {
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.step-note {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.step-note code {
    background: var(--bg-card);
    padding: 2px 8px;
    border-radius: 4px;
    color: var(--color-blue);
}

.download-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.download-btn:hover {
    background: var(--bg-card-hover);
    border-color: rgba(255, 255, 255, 0.2);
}

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

.guide-image img {
    max-width: 700px;
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.guide-caption {
    margin-top: 20px;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ===================================
   Team Section
   =================================== */
.team-section {
    padding: var(--section-padding) 0;
    background: var(--bg-primary);
}

.team-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    margin-bottom: 60px;
}

.team-member {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: 20px 28px;
    text-align: center;
    transition: all var(--transition-normal);
}

.team-member:hover {
    background: var(--bg-card-hover);
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.member-name {
    font-weight: 600;
    font-size: 1.05rem;
    margin-bottom: 4px;
}

.member-affiliation {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.citation-box {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-bottom: 40px;
}

.citation-box h3 {
    font-size: 1.25rem;
    margin-bottom: 16px;
}

.citation-box pre {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: 20px;
    overflow-x: auto;
}

.citation-box code {
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.affiliations {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
}

.affiliation {
    color: var(--text-muted);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

.affiliation:hover {
    color: var(--text-primary);
}

/* ===================================
   Footer
   =================================== */
.footer {
    padding: 60px 0 40px;
    background: var(--bg-tertiary);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    margin-bottom: 32px;
}

.footer-logo {
    font-size: 1.75rem;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 32px;
}

.footer-links a {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.footer-license {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-bottom a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.footer-bottom a:hover {
    color: var(--text-primary);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
    .highlights-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .demo-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .demo-item.featured {
        grid-column: span 2;
    }
    
    .framework-description ul {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 15, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .highlights-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .demo-grid {
        grid-template-columns: 1fr;
    }
    
    .demo-item.featured {
        grid-column: span 1;
    }
    
    .step {
        flex-direction: column;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
}

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

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Glow effects */
.glow {
    box-shadow: 
        0 0 20px rgba(157, 120, 227, 0.3),
        0 0 40px rgba(77, 150, 255, 0.2);
}