/* 
   FSM Pro Design System 
   ---------------------
*/

:root {
    /* Colors */
    --primary-blue: #2563EB;
    --primary-dark: #1E40AF;
    --secondary-indigo: #312E81;
    --accent-amber: #F59E0B;
    --slate-900: #0F172A;
    --slate-800: #1E293B;
    --slate-700: #334155;
    --slate-600: #475569;
    --slate-500: #64748B;
    --slate-100: #F1F5F9;
    --slate-50: #F8FAFC;
    --white: #FFFFFF;
    
    /* Spacing */
    --container-width: 1200px;
    --header-height: 80px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-base: all 0.3s ease;
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--slate-700);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--slate-900);
    line-height: 1.2;
    font-weight: 700;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

ul {
    list-style: none;
}

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

/* Utility Classes */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section-padding {
    padding: 6rem 0;
}

.text-center { text-align: center; }
.text-primary { color: var(--primary-blue); }
.text-accent { color: var(--accent-amber); }
.text-white { color: var(--white); }

.bg-slate { background-color: var(--slate-50); }
.bg-dark { background-color: var(--slate-900); color: var(--white); }

/* Components */
.btn {
    display: inline-block;
    padding: 0.875rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--primary-blue);
    color: var(--white);
    border: 2px solid var(--primary-blue);
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--primary-blue);
    border: 2px solid rgba(37, 99, 235, 0.2);
}

.btn-secondary:hover {
    border-color: var(--primary-blue);
    background-color: rgba(37, 99, 235, 0.05);
}

.btn-accent {
    background-color: var(--accent-amber);
    color: var(--white);
    border: 2px solid var(--accent-amber);
}

.btn-accent:hover {
    background-color: #D97706;
    border-color: #D97706;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-blue {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary-blue);
}

/* Header & Nav */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    transition: var(--transition-base);
}

.main-header.scrolled {
    box-shadow: var(--shadow-md);
    padding: 0.5rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--secondary-indigo);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--slate-600);
    font-weight: 500;
}

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

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--slate-700);
}

/* Hero Section */
.hero {
    padding-top: calc(var(--header-height) + 4rem);
    padding-bottom: 6rem;
    background: linear-gradient(135deg, var(--slate-50) 0%, #E0E7FF 100%);
    position: relative;
    overflow: hidden;
}

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

.hero-text h1 {
    font-size: 3.5rem;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

.hero-text p {
    font-size: 1.25rem;
    color: var(--slate-600);
    margin-bottom: 2.5rem;
    max-width: 500px;
}

.hero-btns {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-visual {
    position: relative;
}

.hero-mockup-main {
    border-radius: 1rem;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(0,0,0,0.1);
    background: var(--white);
    overflow: hidden;
    transform: perspective(1000px) rotateY(-5deg) rotateX(2deg);
    transition: var(--transition-base);
}

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

/* Value Props */
.value-props {
    margin-top: -4rem;
    position: relative;
    z-index: 10;
}

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

.prop-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    border-top: 4px solid var(--primary-blue);
    transition: var(--transition-base);
}

.prop-card:hover {
    transform: translateY(-5px);
}

.prop-icon {
    width: 3rem;
    height: 3rem;
    background: var(--slate-100);
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-blue);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.prop-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

/* Features Deep Dive */
.feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    padding: 4rem 0;
}

.feature-row.reverse {
    direction: rtl;
}

.feature-row.reverse .feature-text {
    direction: ltr;
}

.feature-visual img {
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
}

.feature-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.feature-points li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    color: var(--slate-600);
}

.check-icon {
    color: var(--primary-blue);
    font-weight: bold;
}

/* Tech Edge */
.tech-edge {
    background: var(--slate-900);
    color: var(--white);
    padding: 6rem 0;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.tech-item {
    text-align: center;
    padding: 2rem;
    background: rgba(255,255,255,0.05);
    border-radius: 1rem;
    backdrop-filter: blur(5px);
}

.tech-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--accent-amber);
}

/* Pricing */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.price-card {
    background: var(--white);
    border: 1px solid var(--slate-200);
    border-radius: 1rem;
    padding: 2.5rem;
    position: relative;
    transition: var(--transition-base);
}

.price-card.featured {
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-xl);
    transform: scale(1.05);
    z-index: 2;
}

.price-header {
    margin-bottom: 2rem;
    text-align: center;
}

.price {
    font-size: 3rem;
    font-weight: 800;
    color: var(--slate-900);
}

.period {
    color: var(--slate-500);
}

.price-features li {
    margin-bottom: 1rem;
    text-align: center;
    color: var(--slate-600);
}

/* Footer */
footer {
    background: var(--slate-900);
    color: var(--slate-400);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
    border-bottom: 1px solid var(--slate-800);
    padding-bottom: 3rem;
}

.footer-col h4 {
    color: var(--white);
    margin-bottom: 1.5rem;
}

.footer-col ul li {
    margin-bottom: 0.75rem;
}

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

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

.animate-in {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 1024px) {
    :root { --container-width: 90%; }
    
    .hero-content, .feature-row {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }
    
    .hero-text p { margin: 0 auto 2.5rem; }
    .hero-btns { justify-content: center; }
    .feature-row.reverse { direction: ltr; }
    
    .props-grid, .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-md);
        transform: translateY(-150%);
        transition: var(--transition-base);
    }
    
    .nav-links.active {
        transform: translateY(0);
    }
    
    .mobile-menu-btn { display: block; }
    
    .props-grid, .pricing-grid, .tech-grid, .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .price-card.featured { transform: none; }
    
    .hero-text h1 { font-size: 2.5rem; }
}