/* ============================================
   FlowSync - Modern SaaS Landing Page
   Design System: Acid Neon
   ============================================ */

/* CSS Variables */
:root {
    /* Acid Neon Palette */
    --color-primary: #CCFF00;
    --color-secondary: #FF3CAC;
    --color-bg: #0D0D0D;
    --color-bg-elevated: #1A1A2E;
    --color-text: #FFFFFF;
    --color-text-muted: rgba(255, 255, 255, 0.6);
    --color-border: rgba(255, 255, 255, 0.1);
    
    /* Typography */
    --font-display: 'Clash Display', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px rgba(204, 255, 0, 0.3);
}

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

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

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.1;
}

h1 {
    font-size: clamp(2.5rem, 8vw, 5rem);
}

h2 {
    font-size: clamp(2rem, 5vw, 3.5rem);
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.5rem);
}

h4 {
    font-size: 1.125rem;
}

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

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.9375rem;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-lg {
    padding: var(--space-md) var(--space-lg);
    font-size: 1rem;
}

.btn-full {
    width: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), #a8d600);
    color: var(--color-bg);
}

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

.btn-secondary {
    background: var(--color-bg-elevated);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

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

.btn-ghost {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.05);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-md) 0;
    transition: all var(--transition-base);
}

.nav.scrolled {
    background: rgba(13, 13, 13, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.5rem;
}

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

.nav-links a {
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

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

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

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--space-3xl) + 60px) 0 var(--space-3xl);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.gradient-mesh {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse 80% 50% at 20% 40%, rgba(204, 255, 0, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(255, 60, 172, 0.1), transparent),
        radial-gradient(ellipse 50% 30% at 50% 80%, rgba(204, 255, 0, 0.05), transparent);
}

.noise-overlay {
    position: absolute;
    inset: 0;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    background: rgba(204, 255, 0, 0.1);
    border: 1px solid rgba(204, 255, 0, 0.2);
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    margin-bottom: var(--space-lg);
}

.badge {
    background: var(--color-primary);
    color: var(--color-bg);
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.75rem;
}

.hero-title {
    margin-bottom: var(--space-md);
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    margin-bottom: var(--space-xl);
    max-width: 500px;
}

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

.hero-stats {
    display: flex;
    gap: var(--space-2xl);
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text);
}

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

/* Dashboard Mockup */
.hero-visual {
    display: none;
}

.dashboard-mockup {
    background: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
    transition: transform var(--transition-slow);
}

.dashboard-mockup:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.mockup-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--color-border);
}

.mockup-dots {
    display: flex;
    gap: 6px;
}

.mockup-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-text-muted);
}

.mockup-dots span:first-child { background: #ff5f57; }
.mockup-dots span:nth-child(2) { background: #febc2e; }
.mockup-dots span:last-child { background: #28c840; }

.mockup-tabs {
    display: flex;
    gap: var(--space-sm);
}

.mockup-tabs span {
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    border-radius: var(--radius-sm);
}

.mockup-tabs span.active {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text);
}

.mockup-content {
    display: flex;
    min-height: 300px;
}

.mockup-sidebar {
    width: 140px;
    padding: var(--space-md);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.sidebar-item.active {
    background: rgba(204, 255, 0, 0.1);
    color: var(--color-primary);
}

.sidebar-item .icon {
    width: 16px;
    height: 16px;
    background: currentColor;
    border-radius: 3px;
    opacity: 0.5;
}

.mockup-main {
    flex: 1;
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.mockup-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

.card-header h4 {
    font-size: 0.875rem;
    font-weight: 600;
}

.status {
    font-size: 0.625rem;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: 600;
    text-transform: uppercase;
}

.status-active {
    background: rgba(204, 255, 0, 0.2);
    color: var(--color-primary);
}

.status-pending {
    background: rgba(255, 160, 0, 0.2);
    color: #ffa000;
}

.status-completed {
    background: rgba(40, 200, 64, 0.2);
    color: #28c840;
}

.progress-bar {
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    margin-bottom: var(--space-sm);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    border-radius: 2px;
    transition: width var(--transition-slow);
}

.card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* Section Styles */
section {
    padding: var(--space-3xl) 0;
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--space-2xl);
}

.section-tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: rgba(204, 255, 0, 0.1);
    border: 1px solid rgba(204, 255, 0, 0.2);
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
}

.section-title {
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: 1.125rem;
}

/* Features Section */
.features {
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-elevated) 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.feature-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(204, 255, 0, 0.3);
    transform: translateY(-4px);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(204, 255, 0, 0.1), rgba(255, 60, 172, 0.1));
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
    color: var(--color-primary);
}

.feature-card h3 {
    margin-bottom: var(--space-sm);
    font-size: 1.25rem;
}

.feature-card p {
    margin-bottom: var(--space-md);
    font-size: 0.9375rem;
}

.feature-link {
    font-weight: 600;
    color: var(--color-primary);
    transition: opacity var(--transition-fast);
}

.feature-link:hover {
    opacity: 0.8;
}

/* Testimonials Section */
.testimonials {
    background: var(--color-bg);
}

.testimonials-carousel {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.carousel-container {
    position: relative;
    overflow: hidden;
}

.testimonial-card {
    display: none;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    text-align: center;
}

.testimonial-card.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.stars {
    color: var(--color-primary);
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
    letter-spacing: 2px;
}

.testimonial-content p {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    font-family: var(--font-display);
    font-weight: 500;
    color: var(--color-text);
    line-height: 1.4;
    margin-bottom: var(--space-xl);
}

.testimonial-author {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
}

.author-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-text);
}

.author-info {
    text-align: left;
}

.author-info h4 {
    font-size: 1rem;
    margin-bottom: 2px;
}

.author-info span {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.carousel-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.carousel-btn {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.carousel-btn:hover {
    background: rgba(204, 255, 0, 0.1);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.carousel-dots {
    display: flex;
    gap: var(--space-sm);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dot.active {
    background: var(--color-primary);
    width: 24px;
    border-radius: 5px;
}

/* Pricing Section */
.pricing {
    background: linear-gradient(180deg, var(--color-bg-elevated) 0%, var(--color-bg) 100%);
}

.pricing-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    position: relative;
    transition: all var(--transition-base);
}

.pricing-card:hover {
    transform: translateY(-4px);
}

.pricing-card.popular {
    background: var(--color-bg-elevated);
    border-color: var(--color-primary);
    box-shadow: 0 0 40px rgba(204, 255, 0, 0.1);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-bg);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-xl);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.pricing-header {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.pricing-header h3 {
    margin-bottom: var(--space-xs);
}

.pricing-header p {
    font-size: 0.9375rem;
}

.pricing-price {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.pricing-price .currency {
    font-size: 1.5rem;
    font-weight: 600;
    vertical-align: top;
}

.pricing-price .amount {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
}

.pricing-price .period {
    font-size: 1rem;
    color: var(--color-text-muted);
}

.pricing-features {
    margin-bottom: var(--space-xl);
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.9375rem;
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

/* CTA Section */
.cta {
    background: var(--color-bg-elevated);
    padding: var(--space-3xl) 0;
    text-align: center;
}

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

.cta h2 {
    margin-bottom: var(--space-md);
}

.cta p {
    font-size: 1.125rem;
    margin-bottom: var(--space-xl);
}

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

/* Footer */
.footer {
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    padding: var(--space-3xl) 0 var(--space-xl);
}

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

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

.footer-brand .logo {
    margin-bottom: var(--space-md);
}

.footer-brand p {
    margin-bottom: var(--space-lg);
    font-size: 0.9375rem;
}

.social-links {
    display: flex;
    gap: var(--space-md);
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background: rgba(204, 255, 0, 0.1);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.footer-links h4 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.footer-links li {
    margin-bottom: var(--space-sm);
}

.footer-links a {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.875rem;
}

/* Animations */
.reveal-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-scale.visible {
    opacity: 1;
    transform: scale(1);
}

/* Responsive Breakpoints */
@media (min-width: 640px) {
    .hero-stats {
        gap: var(--space-3xl);
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }
    
    .nav-links {
        display: flex;
    }
    
    .hero .container {
        grid-template-columns: 1fr 1fr;
    }
    
    .hero-content {
        order: 1;
    }
    
    .hero-visual {
        display: block;
        order: 2;
    }
    
    .pricing-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .pricing-card.popular {
        transform: scale(1.05);
    }
    
    .footer-grid {
        grid-template-columns: 2fr repeat(4, 1fr);
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .hero-stats {
        gap: 4rem;
    }
}

/* Mobile Navigation */
@media (max-width: 767px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        padding: var(--space-md);
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-cta .btn {
        width: 100%;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .cta-buttons .btn {
        width: 100%;
    }
}

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