/* =========================================
   VFTL-ERP Marketing Site Styles
   ========================================= */

/* CSS Variables */
:root {
    /* Colors */
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;
    --color-secondary: #0f172a;
    --color-accent: #06b6d4;
    
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-text-lighter: #94a3b8;
    
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-bg-dark: #0f172a;
    
    --color-border: #e2e8f0;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* 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-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

/* =========================================
   Reset & Base
   ========================================= */

*, *::before, *::after {
    box-sizing: border-box;
}

* {
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
}

input, button, textarea, select {
    font: inherit;
}

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

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

ul {
    list-style: none;
}

/* =========================================
   Utilities
   ========================================= */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn-primary {
    background: var(--color-primary);
    color: #ffffff;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
}

/* Ensure nav buttons have lighter text */
.nav-links .btn-primary {
    background: var(--color-primary-light);
    color: #ffffff;
    font-weight: 600;
}

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

.btn-secondary:hover {
    background: var(--color-border);
}

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

.btn-outline:hover {
    background: var(--color-secondary);
    color: white;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: var(--font-size-lg);
}

.btn-block {
    width: 100%;
}

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

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 64px;
    width: auto;
}

.footer .logo-img {
    height: 72px;
}

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

.nav-links a {
    font-weight: 500;
    color: var(--color-text-light);
    transition: color var(--transition-fast);
}

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

.nav-links .btn {
    margin-left: var(--spacing-sm);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-secondary);
    transition: all var(--transition-base);
}

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

.hero {
    padding: calc(72px + var(--spacing-4xl)) 0 var(--spacing-4xl);
    background: linear-gradient(135deg, #f8fafc 0%, #e0f2fe 50%, #f0f9ff 100%);
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(37, 99, 235, 0.1);
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-lg);
}

.hero h1 {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
    max-width: 540px;
}

.hero-subtitle strong {
    color: var(--color-text);
}

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

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

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

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--color-primary);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

/* Dashboard Preview */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.dashboard-preview {
    width: 100%;
    max-width: 600px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    transform: perspective(1000px) rotateY(-5deg) rotateX(2deg);
    transition: transform var(--transition-slow);
}

.dashboard-preview:hover {
    transform: perspective(1000px) rotateY(-2deg) rotateX(1deg);
}

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

/* =========================================
   Section Styles
   ========================================= */

section {
    padding: var(--spacing-4xl) 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-3xl);
}

.section-header h2 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-md);
}

.section-header p {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
}

/* =========================================
   Problem Section
   ========================================= */

.problem-section {
    background: var(--color-bg-alt);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.problem-card {
    padding: var(--spacing-xl);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.problem-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.problem-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
}

.problem-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.problem-card p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

/* =========================================
   Platform Section
   ========================================= */

.platform-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.feature {
    text-align: center;
    padding: var(--spacing-xl);
}

.feature-icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-md);
}

.feature h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.feature p {
    color: var(--color-text-light);
}

/* =========================================
   Modules Section
   ========================================= */

.modules-section {
    background: var(--color-bg-alt);
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.module-card {
    padding: var(--spacing-xl);
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    position: relative;
}

.module-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.module-card.core {
    grid-column: span 3;
    background: linear-gradient(135deg, var(--color-secondary) 0%, #1e3a5f 100%);
    color: white;
    border: none;
}

.module-card.core h3,
.module-card.core p {
    color: white;
}

.module-card.core .module-features {
    color: rgba(255, 255, 255, 0.8);
}

.module-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-primary);
    color: white;
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
}

.module-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.module-card p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-md);
}

.module-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.module-features li {
    font-size: var(--font-size-sm);
    padding-left: var(--spacing-lg);
    position: relative;
}

.module-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-success);
}

.module-card.core .module-features li::before {
    color: var(--color-accent);
}

.module-price {
    display: block;
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-primary);
    margin-top: auto;
}

.modules-cta {
    text-align: center;
    margin-top: var(--spacing-2xl);
}

/* =========================================
   Pricing Section
   ========================================= */

.pricing-examples {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.pricing-card {
    padding: var(--spacing-xl);
    background: white;
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-border);
    text-align: center;
    position: relative;
    transition: all var(--transition-base);
}

.pricing-card:hover {
    border-color: var(--color-primary-light);
}

.pricing-card.featured {
    border-color: var(--color-primary);
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.featured-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-primary);
    color: white;
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
}

.pricing-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-lg);
}

.pricing-modules {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
}

.pricing-modules span {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg-alt);
    font-size: var(--font-size-xs);
    border-radius: var(--radius-sm);
}

.pricing-total {
    margin-bottom: var(--spacing-md);
}

.pricing-total .price {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--color-secondary);
}

.pricing-total .period {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
}

.pricing-compare {
    font-size: var(--font-size-sm);
    color: var(--color-success);
    font-weight: 500;
}

.pricing-footer {
    text-align: center;
    color: var(--color-text-light);
}

.pricing-footer p {
    margin-bottom: var(--spacing-sm);
}

/* =========================================
   Comparison Section
   ========================================= */

.compare-section {
    background: var(--color-bg-alt);
}

.compare-table-wrapper {
    overflow-x: auto;
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.compare-table th,
.compare-table td {
    padding: var(--spacing-lg);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.compare-table th {
    background: var(--color-bg-alt);
    font-weight: 600;
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.compare-table th.highlight,
.compare-table td.highlight {
    background: rgba(37, 99, 235, 0.05);
}

.compare-table th.highlight {
    color: var(--color-primary);
}

.compare-table td.highlight {
    color: var(--color-primary);
    font-weight: 600;
}

.compare-table tbody tr:last-child td {
    border-bottom: none;
}

/* =========================================
   Industries Section
   ========================================= */

.industries-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.industry-card {
    text-align: center;
    padding: var(--spacing-xl);
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.industry-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.industry-icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-md);
}

.industry-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
}

.industry-card p {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

/* =========================================
   Demo Section
   ========================================= */

.demo-section {
    background: linear-gradient(135deg, var(--color-secondary) 0%, #1e3a5f 100%);
    color: white;
}

.demo-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.demo-text h2 {
    color: white;
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-lg);
}

.demo-text p {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    margin-bottom: var(--spacing-xl);
}

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

.demo-benefits li {
    font-size: var(--font-size-lg);
    opacity: 0.9;
}

.demo-form-wrapper {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-xl);
}

.demo-form h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xl);
    color: var(--color-secondary);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: var(--font-size-base);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    color: var(--color-text);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-disclaimer {
    margin-top: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    text-align: center;
}

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

.footer {
    background: var(--color-secondary);
    color: white;
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

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

.footer-brand .logo {
    color: white;
    margin-bottom: var(--spacing-md);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    max-width: 300px;
}

.footer-links h4 {
    color: white;
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-lg);
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.5);
}

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

@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-subtitle {
        margin: 0 auto var(--spacing-xl);
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    .problem-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .platform-features {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .modules-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .module-card.core {
        grid-column: span 2;
    }
    
    .pricing-examples {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto var(--spacing-2xl);
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .industries-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .demo-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .demo-benefits {
        align-items: center;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.25rem;
        --font-size-4xl: 1.875rem;
        --font-size-3xl: 1.5rem;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero h1 {
        font-size: var(--font-size-4xl);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .problem-grid,
    .platform-features,
    .modules-grid,
    .industries-grid {
        grid-template-columns: 1fr;
    }
    
    .module-card.core {
        grid-column: span 1;
    }
    
    .module-features {
        grid-template-columns: 1fr;
    }
    
    .compare-table {
        font-size: var(--font-size-sm);
    }
    
    .compare-table th,
    .compare-table td {
        padding: var(--spacing-md);
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand p {
        max-width: none;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
    }
    
    .btn-lg {
        width: 100%;
    }
}