/* ============================================
   PuffPAI Website Styles
   Modern, sophisticated design with glassmorphism
   ============================================ */

/* CSS Variables for Brand Colors */
:root {
    /* Brand Colors */
    --primary-gradient-start: #667eea;
    --primary-gradient-end: #764ba2;
    --accent-gradient-start: #f093fb;
    --accent-gradient-end: #f5576c;
    --primary-stroke: #5a67d8;
    
    /* Neutral Colors */
    --bg-dark: #0a0118;
    --bg-darker: #050010;
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --text-muted: #718096;
    
    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(102, 126, 234, 0.1);
    --shadow-md: 0 4px 16px rgba(102, 126, 234, 0.15);
    --shadow-lg: 0 8px 32px rgba(102, 126, 234, 0.2);
    --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.3);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================
   Global Styles
   ============================================ */

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

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

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

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ============================================
   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); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.25rem; }

.gradient-text {
    background: linear-gradient(135deg, var(--primary-gradient-start), var(--accent-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1.5rem 0;
    backdrop-filter: blur(20px);
    background: rgba(10, 1, 24, 0.8);
    border-bottom: 1px solid var(--glass-border);
    transition: all var(--transition-base);
}

.navbar.scrolled {
    padding: 1rem 0;
    background: rgba(10, 1, 24, 0.95);
    box-shadow: var(--shadow-md);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}

.logo img {
    width: 40px;
    height: 40px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a:not(.btn-secondary):hover {
    color: var(--text-primary);
}

.nav-links a:not(.btn-secondary)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-gradient-start), var(--accent-gradient-end));
    transition: width var(--transition-base);
}

.nav-links a:not(.btn-secondary):hover::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-base);
}

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

.btn-primary,
.btn-secondary,
.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-gradient-start), var(--primary-gradient-end));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

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

.btn-outline:hover {
    background: var(--glass-bg);
    border-color: var(--primary-gradient-start);
}

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

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 8rem 0 4rem;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--primary-gradient-start), transparent);
    top: -200px;
    left: -200px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--accent-gradient-start), transparent);
    bottom: -150px;
    right: -150px;
    animation-delay: 7s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--primary-gradient-end), transparent);
    top: 50%;
    right: 10%;
    animation-delay: 14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -50px) scale(1.1); }
    66% { transform: translate(-30px, 30px) scale(0.9); }
}

.hero-content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    backdrop-filter: blur(10px);
    width: fit-content;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #48bb78;
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    margin: 0;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 3rem;
    margin-top: 2rem;
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-gradient-start), var(--accent-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================
   Hero Visual (Terminal Demo)
   ============================================ */

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
}

.glass-card.floating {
    animation: floatCard 6s ease-in-out infinite;
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--glass-border);
}

.terminal-dots {
    display: flex;
    gap: 0.5rem;
}

.terminal-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.terminal-dots span:nth-child(1) { background: #ff5f56; }
.terminal-dots span:nth-child(2) { background: #ffbd2e; }
.terminal-dots span:nth-child(3) { background: #27c93f; }

.terminal-title {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
}

.terminal-content {
    padding: 1.5rem;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.875rem;
    line-height: 1.8;
}

.terminal-line {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.prompt {
    color: var(--text-muted);
    flex-shrink: 0;
}

.prompt.ai {
    color: var(--primary-gradient-start);
}

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

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

.typing-indicator {
    display: inline-flex;
    gap: 4px;
}

.typing-indicator span {
    width: 6px;
    height: 6px;
    background: var(--primary-gradient-start);
    border-radius: 50%;
    animation: typing 1.4s ease-in-out infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.7; }
    30% { transform: translateY(-10px); opacity: 1; }
}

.status-bar {
    display: flex;
    gap: 2rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--glass-border);
    font-size: 0.75rem;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.status-dot.green {
    background: #48bb78;
    box-shadow: 0 0 10px #48bb78;
}

/* ============================================
   Features Section
   ============================================ */

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

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem;
}

.section-header h2 {
    margin-bottom: 1rem;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.feature-card {
    padding: 2rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--primary-gradient-start);
    box-shadow: var(--shadow-glow);
}

.feature-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-gradient-start), var(--primary-gradient-end));
    border-radius: var(--radius-sm);
    margin-bottom: 1.5rem;
    color: white;
}

.feature-card h3 {
    margin-bottom: 0.75rem;
    font-size: 1.5rem;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============================================
   Why PuffPAI Section
   ============================================ */

.why-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
}

.why-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.why-text h2 {
    margin-bottom: 2rem;
}

.comparison-table {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.comparison-row {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    border-bottom: 1px solid var(--glass-border);
}

.comparison-row:last-child {
    border-bottom: none;
}

.comparison-row.header {
    background: rgba(102, 126, 234, 0.1);
}

.comparison-row.header .comparison-cell {
    font-weight: 700;
    color: var(--text-primary);
}

.comparison-cell {
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
}

.comparison-cell.highlight {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    color: var(--text-primary);
    font-weight: 600;
}

.comparison-cell svg {
    flex-shrink: 0;
}

.comparison-cell.highlight svg {
    color: #48bb78;
}

.comparison-cell:not(.highlight) svg {
    color: #f56565;
}

/* Privacy Illustration */

.privacy-illustration {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
}

.shield-container {
    position: relative;
    z-index: 2;
}

.shield-svg {
    width: 200px;
    height: 220px;
    filter: drop-shadow(0 0 40px rgba(102, 126, 234, 0.5));
}

.shield-path {
    animation: shieldPulse 3s ease-in-out infinite;
}

@keyframes shieldPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.checkmark {
    stroke-dasharray: 100;
    stroke-dashoffset: 100;
    animation: drawCheck 2s ease-in-out 1s forwards;
}

@keyframes drawCheck {
    to { stroke-dashoffset: 0; }
}

.data-particles {
    position: absolute;
    inset: 0;
}

.particle {
    position: absolute;
    width: 8px;
    height: 8px;
    background: linear-gradient(135deg, var(--primary-gradient-start), var(--accent-gradient-end));
    border-radius: 50%;
    opacity: 0;
    animation: particleFloat 4s ease-in-out infinite;
}

.particle:nth-child(1) {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.particle:nth-child(2) {
    top: 40%;
    right: 15%;
    animation-delay: 0.8s;
}

.particle:nth-child(3) {
    bottom: 30%;
    left: 20%;
    animation-delay: 1.6s;
}

.particle:nth-child(4) {
    top: 60%;
    right: 25%;
    animation-delay: 2.4s;
}

.particle:nth-child(5) {
    bottom: 20%;
    right: 10%;
    animation-delay: 3.2s;
}

.particle:nth-child(6) {
    top: 30%;
    left: 30%;
    animation-delay: 0.4s;
}

@keyframes particleFloat {
    0% {
        transform: translate(0, 0) scale(0);
        opacity: 0;
    }
    50% {
        transform: translate(20px, -30px) scale(1);
        opacity: 1;
    }
    100% {
        transform: translate(50px, -80px) scale(0);
        opacity: 0;
    }
}

/* ============================================
   Getting Started Section
   ============================================ */

.getting-started {
    padding: var(--spacing-xl) 0;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.step-card {
    padding: 2rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
    text-align: center;
    transition: all var(--transition-base);
}

.step-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary-gradient-start);
    box-shadow: var(--shadow-glow);
}

.step-number {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--primary-gradient-start), var(--primary-gradient-end));
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.step-card h3 {
    margin-bottom: 1rem;
}

.step-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    text-align: left;
}

.step-card code {
    display: block;
    margin: 1rem 0;
    padding: 0.75rem;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.875rem;
    color: var(--primary-gradient-start);
    overflow-x: auto;
}

.cta-section {
    text-align: center;
    padding: 3rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
}

.cta-note {
    margin-top: 1rem;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ============================================
   About Section
   ============================================ */

.about {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(180deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text h2 {
    margin-bottom: 1.5rem;
}

.about-text p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-values {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
}

.value h4 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.value p {
    margin: 0;
    font-size: 1rem;
}

.team-card {
    padding: 2rem;
    text-align: center;
}

.team-card h3 {
    margin-bottom: 1.5rem;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    text-decoration: none;
    transition: all var(--transition-base);
}

.contact-link:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary-gradient-start);
    transform: translateX(4px);
}

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

.footer {
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

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

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

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

.footer-column a {
    display: block;
    padding: 0.5rem 0;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

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

@media (max-width: 1024px) {
    .hero-content,
    .why-content,
    .about-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero {
        padding: 6rem 0 3rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-stats {
        gap: 1.5rem;
    }
    
    .features-grid,
    .steps-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-row {
        grid-template-columns: 1fr;
    }
    
    .comparison-cell {
        border-bottom: 1px solid var(--glass-border);
    }
    
    .comparison-row:not(.header) .comparison-cell:first-child {
        font-weight: 600;
        color: var(--text-primary);
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 1.5rem;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .hero-stats {
        flex-wrap: wrap;
    }
    
    .stat {
        flex: 1 1 calc(50% - 1rem);
    }
}