/* ================================================
   DFX Studio AI - Liquid Glass Design System
   ================================================ */

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

:root {
    /* Color Palette */
    --primary-600: #6366F1;
    --primary-700: #4F46E5;
    --primary-800: #4338CA;
    --purple-600: #8B5CF6;
    --purple-700: #7C3AED;
    
    /* Glass Effect Colors */
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-highlight: rgba(255, 255, 255, 0.25);
    
    /* Text Colors */
    --text-primary: #FFFFFF;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-tertiary: rgba(255, 255, 255, 0.5);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border Radius - Universal Softness */
    --radius-standard: 1.5rem;  /* rounded-2xl equivalent */
    --radius-full: 9999px;      /* rounded-full equivalent */
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.12);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.16);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.24);
    --shadow-glow: 0 0 32px rgba(99, 102, 241, 0.4);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #0F172A 100%);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ================================================
   Liquid Glass Components
   ================================================ */

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-standard);
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--glass-highlight);
    box-shadow: var(--shadow-lg), inset 0 0 24px rgba(255, 255, 255, 0.08);
    transform: translateY(-4px);
}

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

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(20px) saturate(150%);
    -webkit-backdrop-filter: blur(20px) saturate(150%);
    border-bottom: 1px solid var(--glass-border);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #6366F1, #8B5CF6);
    transform: scaleX(0);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: var(--radius-full);
}

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

.nav-link:hover::after {
    transform: scaleX(1);
}

/* ================================================
   Buttons - Universal Softness
   ================================================ */

.btn-primary,
.btn-secondary {
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-standard);
    border: none;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    color: white;
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), transparent);
    opacity: 0;
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.5), inset 0 0 24px rgba(255, 255, 255, 0.1);
}

.btn-primary:hover::before {
    opacity: 1;
}

.btn-secondary {
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--glass-highlight);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), inset 0 0 16px rgba(255, 255, 255, 0.08);
}

.btn-large {
    padding: 1.125rem 2rem;
    font-size: 1rem;
}

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

.hero {
    position: relative;
    padding: calc(80px + var(--spacing-3xl)) 0 var(--spacing-3xl);
    overflow: hidden;
}

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

.gradient-orb {
    position: absolute;
    border-radius: var(--radius-full);
    filter: blur(80px);
    opacity: 0.6;
    animation: float 8s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #6366F1 0%, transparent 70%);
    top: -250px;
    left: -150px;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #8B5CF6 0%, transparent 70%);
    top: 100px;
    right: -100px;
    animation-delay: -3s;
}

.orb-3 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, #EC4899 0%, transparent 70%);
    bottom: -100px;
    left: 30%;
    animation-delay: -6s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0);
    }
    33% {
        transform: translateY(-30px) translateX(20px);
    }
    66% {
        transform: translateY(20px) translateX(-20px);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.5rem 1.25rem;
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.badge-icon {
    font-size: 1.1rem;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, #6366F1 0%, #8B5CF6 50%, #EC4899 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-standard);
    max-width: 700px;
    margin: 0 auto;
}

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

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--glass-border);
}

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

.features {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

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

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

.feature-card {
    background: var(--glass-bg);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-standard);
    padding: var(--spacing-xl);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--glass-highlight);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg), inset 0 0 32px rgba(255, 255, 255, 0.08);
}

.feature-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-standard);
    margin-bottom: var(--spacing-md);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-icon.dfm {
    color: #6366F1;
}

.feature-icon.dfa {
    color: #8B5CF6;
}

.feature-icon.dft {
    color: #EC4899;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
    box-shadow: 0 0 32px currentColor;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.feature-list {
    list-style: none;
}

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

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #6366F1;
    font-weight: bold;
}

/* ================================================
   How It Works Section
   ================================================ */

.how-it-works {
    padding: var(--spacing-3xl) 0;
    background: rgba(0, 0, 0, 0.2);
}

.workflow-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.workflow-step {
    flex: 1;
    min-width: 280px;
    max-width: 320px;
}

.step-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
    opacity: 0.3;
}

.step-content {
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-standard);
    padding: var(--spacing-xl);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.step-content:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.step-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #6366F1, #8B5CF6);
    border-radius: var(--radius-standard);
    margin-bottom: var(--spacing-md);
    color: white;
}

.step-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.step-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

.workflow-arrow {
    flex-shrink: 0;
}

/* ================================================
   Benefits Section
   ================================================ */

.benefits {
    padding: var(--spacing-3xl) 0;
}

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

.benefit-card {
    background: var(--glass-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-standard);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.benefit-card:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--glass-highlight);
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-lg), inset 0 0 24px rgba(255, 255, 255, 0.08);
}

.benefit-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    display: inline-block;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.benefit-card:hover .benefit-icon {
    transform: scale(1.2) rotate(5deg);
}

.benefit-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.benefit-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

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

.cta-section {
    padding: var(--spacing-3xl) 0;
}

.cta-card {
    position: relative;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(139, 92, 246, 0.15));
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-standard);
    padding: var(--spacing-3xl);
    text-align: center;
    overflow: hidden;
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

.cta-visual {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.visual-circle {
    position: absolute;
    border-radius: var(--radius-full);
    opacity: 0.4;
    filter: blur(60px);
}

.circle-1 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, #6366F1, transparent);
    top: -150px;
    left: -100px;
}

.circle-2 {
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, #8B5CF6, transparent);
    bottom: -100px;
    right: -50px;
}

.circle-3 {
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, #EC4899, transparent);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

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

.footer {
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
    border-top: 1px solid var(--glass-border);
    background: rgba(0, 0, 0, 0.3);
}

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

.footer-brand {
    max-width: 300px;
}

.footer-tagline {
    color: var(--text-tertiary);
    margin-top: var(--spacing-sm);
    font-size: 0.95rem;
}

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

.footer-heading {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.footer-link {
    color: var(--text-tertiary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

.copyright {
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

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

.legal-link {
    color: var(--text-tertiary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

@media (max-width: 1024px) {
    .nav-links {
        display: none;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
    
    .workflow-arrow {
        display: none;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-2xl: 3rem;
        --spacing-3xl: 4rem;
    }
    
    .hero {
        padding: calc(80px + var(--spacing-2xl)) 0 var(--spacing-2xl);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1.05rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .stat-divider {
        width: 80%;
        height: 1px;
    }
    
    .features-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .btn-large {
        width: 100%;
        justify-content: center;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
}