/* ============================================
   SuccessPilot AI - Liquid Glass Design System
   ============================================ */

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

:root {
    /* Color Palette - Blue to Green Gradient (Trust → Growth) */
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #1a1a2e;
    --color-blue: #3b82f6;
    --color-green: #10b981;
    --color-cyan: #06b6d4;
    --color-text-primary: #ffffff;
    --color-text-secondary: #94a3b8;
    --color-glass-bg: rgba(255, 255, 255, 0.05);
    --color-glass-border: rgba(255, 255, 255, 0.1);
    
    /* Border Radius - Only 2 values (Liquid Glass principle) */
    --radius-container: 16px; /* rounded-2xl */
    --radius-full: 9999px;    /* rounded-full */
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    
    /* Animation */
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-index */
    --z-nav: 1000;
    --z-modal: 100;
    --z-content: 10;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, #0f1419 50%, #0a1f1a 100%);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Utility Classes */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-nav);
    padding: var(--spacing-md) 0;
    transition: all 0.3s var(--ease-smooth);
}

.nav.scrolled {
    background: var(--color-glass-bg);
    backdrop-filter: blur(20px) saturate(150%) brightness(110%);
    border-bottom: 1px solid var(--color-glass-border);
}

@supports not (backdrop-filter: blur(20px)) {
    .nav.scrolled {
        background: rgba(26, 26, 46, 0.95);
    }
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-decoration: none;
    color: var(--color-text-primary);
    font-weight: 700;
    font-size: 1.25rem;
    transition: transform 0.3s var(--ease-smooth);
}

.nav-logo:hover {
    transform: scale(1.05);
}

.logo-icon {
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    margin: 0;
}

.nav-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s var(--ease-smooth);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-blue), var(--color-green));
    transition: width 0.3s var(--ease-smooth);
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-cta {
    padding: 0.625rem 1.5rem;
    background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-green) 100%);
    color: var(--color-text-primary);
    text-decoration: none;
    border-radius: var(--radius-full);
    font-weight: 600;
    transition: transform 0.3s var(--ease-smooth), box-shadow 0.3s var(--ease-smooth);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.3);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    overflow: hidden;
}

.hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: var(--z-content);
    text-align: center;
    max-width: 900px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.5rem 1.25rem;
    background: var(--color-glass-bg);
    backdrop-filter: blur(20px) saturate(150%) brightness(110%);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s var(--ease-smooth) 0.1s both;
}

@supports not (backdrop-filter: blur(20px)) {
    .hero-badge {
        background: rgba(255, 255, 255, 0.1);
    }
}

.badge-icon {
    font-size: 1.125rem;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.6s var(--ease-smooth) 0.2s both;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.6s var(--ease-smooth) 0.3s both;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-2xl);
    animation: fadeInUp 0.6s var(--ease-smooth) 0.4s both;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s var(--ease-smooth) 0.5s both;
}

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

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

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

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s var(--ease-smooth);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-green) 100%);
    color: var(--color-text-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background: var(--color-glass-bg);
    backdrop-filter: blur(20px) saturate(150%) brightness(110%);
    border: 1px solid var(--color-glass-border);
    color: var(--color-text-primary);
}

@supports not (backdrop-filter: blur(20px)) {
    .btn-secondary {
        background: rgba(255, 255, 255, 0.1);
    }
}

.btn-secondary:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.12);
    box-shadow: 0 8px 24px rgba(255, 255, 255, 0.1);
}

/* ============================================
   Section Headers
   ============================================ */
.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);
    background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* ============================================
   Features Section
   ============================================ */
.features {
    padding: var(--spacing-2xl) 0;
}

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

.feature-card {
    padding: var(--spacing-xl);
    background: var(--color-glass-bg);
    backdrop-filter: blur(20px) saturate(150%) brightness(110%);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-container);
    transition: all 0.3s var(--ease-smooth);
}

@supports not (backdrop-filter: blur(20px)) {
    .feature-card {
        background: rgba(255, 255, 255, 0.05);
    }
}

.feature-card:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 16px 48px rgba(59, 130, 246, 0.15);
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-green) 100%);
    border-radius: var(--radius-container);
    margin-bottom: var(--spacing-md);
    color: white;
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.feature-title {
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

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

.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    padding: 0.375rem 0;
    color: var(--color-text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-green);
    font-weight: 700;
}

/* ============================================
   Benefits Section
   ============================================ */
.benefits {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(180deg, transparent 0%, rgba(59, 130, 246, 0.03) 50%, transparent 100%);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
}

.benefit-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--color-glass-bg);
    backdrop-filter: blur(20px) saturate(150%) brightness(110%);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-container);
    transition: all 0.3s var(--ease-smooth);
}

@supports not (backdrop-filter: blur(20px)) {
    .benefit-card {
        background: rgba(255, 255, 255, 0.05);
    }
}

.benefit-card:hover {
    transform: scale(1.05);
    box-shadow: 0 16px 48px rgba(16, 185, 129, 0.15);
}

.benefit-metric {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.benefit-label {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.benefit-description {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

/* ============================================
   Workflow Section
   ============================================ */
.workflow {
    padding: var(--spacing-2xl) 0;
}

.workflow-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    align-items: center;
}

.workflow-step {
    text-align: center;
    padding: var(--spacing-lg);
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-green) 100%);
    border-radius: var(--radius-full);
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

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

.step-description {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.workflow-arrow {
    text-align: center;
    font-size: 2rem;
    color: var(--color-blue);
    display: none;
}

/* ============================================
   Use Cases Section
   ============================================ */
.use-cases {
    padding: var(--spacing-2xl) 0;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-lg);
}

.use-case-card {
    padding: var(--spacing-xl);
    background: var(--color-glass-bg);
    backdrop-filter: blur(20px) saturate(150%) brightness(110%);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-container);
    text-align: center;
    transition: all 0.3s var(--ease-smooth);
}

@supports not (backdrop-filter: blur(20px)) {
    .use-case-card {
        background: rgba(255, 255, 255, 0.05);
    }
}

.use-case-card:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 16px 48px rgba(59, 130, 246, 0.15);
}

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

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

.use-case-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(16, 185, 129, 0.1) 100%);
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.cta-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.cta-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

.cta-form {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 500px;
    margin: 0 auto var(--spacing-lg);
    flex-wrap: wrap;
    justify-content: center;
}

.cta-input {
    flex: 1;
    min-width: 250px;
    padding: 0.875rem 1.5rem;
    background: var(--color-glass-bg);
    backdrop-filter: blur(20px) saturate(150%) brightness(110%);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-full);
    color: var(--color-text-primary);
    font-size: 1rem;
    transition: all 0.3s var(--ease-smooth);
}

@supports not (backdrop-filter: blur(20px)) {
    .cta-input {
        background: rgba(255, 255, 255, 0.05);
    }
}

.cta-input:focus {
    outline: none;
    border-color: var(--color-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.cta-input::placeholder {
    color: var(--color-text-secondary);
}

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

.trust-badge {
    padding: 0.5rem 1rem;
    background: var(--color-glass-bg);
    backdrop-filter: blur(20px) saturate(150%) brightness(110%);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

@supports not (backdrop-filter: blur(20px)) {
    .trust-badge {
        background: rgba(255, 255, 255, 0.05);
    }
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    border-top: 1px solid var(--color-glass-border);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.footer-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
    max-width: 300px;
}

.footer-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color 0.3s var(--ease-smooth);
}

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

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

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

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

.footer-social a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s var(--ease-smooth);
}

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

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================
   Responsive Design (Mobile-First)
   ============================================ */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero {
        padding: var(--spacing-2xl) var(--spacing-sm);
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .features-grid,
    .benefits-grid,
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
    
    .workflow-steps {
        grid-template-columns: 1fr;
    }
    
    .workflow-arrow {
        transform: rotate(90deg);
    }
    
    .cta-form {
        flex-direction: column;
    }
    
    .cta-input {
        width: 100%;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (min-width: 1024px) {
    .workflow-arrow {
        display: block;
    }
    
    .workflow-steps {
        grid-template-columns: repeat(7, 1fr);
    }
    
    .workflow-step {
        grid-column: span 1;
    }
    
    .workflow-step:nth-child(1) { grid-column: 1; }
    .workflow-arrow:nth-child(2) { grid-column: 2; }
    .workflow-step:nth-child(3) { grid-column: 3; }
    .workflow-arrow:nth-child(4) { grid-column: 4; }
    .workflow-step:nth-child(5) { grid-column: 5; }
    .workflow-arrow:nth-child(6) { grid-column: 6; }
    .workflow-step:nth-child(7) { grid-column: 7; }
}