:root {
    --primary-color: #2563EB; /* Royal Blue */
    --primary-hover: #1D4ED8;
    --text-main: #1F2937; /* Dark Grey */
    --text-secondary: #6B7280; /* Medium Grey */
    --bg-white: #FFFFFF;
    --bg-light: #F9FAFB;
    --border-color: #E5E7EB;
    
    --font-family: 'Inter', sans-serif;
    --container-width: 1200px;
    --spacing-unit: 16px;
}

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

body {
    font-family: var(--font-family);
    color: var(--text-main);
    background-color: var(--bg-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s;
}

ul {
    list-style: none;
}

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

/* Utilities */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 6px;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

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

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

.btn-outline:hover {
    border-color: var(--text-main);
    background-color: var(--bg-light);
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-main);
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.logo img {
    height: 50px;
    width: auto;
}

.nav-list {
    display: flex;
    gap: 32px;
}

.nav-list a {
    color: var(--text-secondary);
    font-weight: 500;
}

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

/* Hero Section */
.hero {
    padding: 80px 0;
    overflow: hidden;
}

.hero-container {
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-content {
    flex: 1;
}

.hero-content h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    font-weight: 800;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-sub {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 500px;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

/* Social Proof */
.social-proof {
    padding: 40px 0;
    background-color: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    text-align: center;
}

.social-proof p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 24px;
}

.logos-grid {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
    opacity: 0.6;
}

.company-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-secondary);
    filter: grayscale(100%);
}

/* Features */
.features {
    padding: 100px 0;
    background-color: var(--bg-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.feature-card {
    padding: 32px;
    background: var(--bg-white);
    border-radius: 12px;
    transition: transform 0.2s;
}

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

.icon-box {
    width: 48px;
    height: 48px;
    background-color: #EFF6FF; /* Light Blue */
    color: var(--primary-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    font-weight: 600;
}

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

/* Use Cases */
.use-cases {
    padding: 100px 0;
    background-color: var(--bg-light);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.use-case-card {
    background: var(--bg-white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
}

.use-case-card h3 {
    margin-bottom: 16px;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
}

.use-case-card p {
    color: var(--text-secondary);
}

/* Pricing */
.pricing {
    padding: 100px 0;
    background-color: var(--bg-white);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    align-items: start;
}

.pricing-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    padding: 40px;
    border-radius: 16px;
    position: relative;
    text-align: center;
}

.pricing-card.recommended {
    border-color: var(--primary-color);
    box-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.1), 0 8px 10px -6px rgba(37, 99, 235, 0.1);
    transform: scale(1.05);
    z-index: 10;
}

.badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--primary-color);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.pricing-card h3 {
    font-size: 1.25rem;
    margin-bottom: 16px;
}

.price {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 8px;
    color: var(--text-main);
}

.price span {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.features-list {
    margin: 32px 0;
    text-align: left;
}

.features-list li {
    margin-bottom: 12px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
}

.features-list li::before {
    content: "✓";
    color: var(--primary-color);
    font-weight: bold;
    margin-right: 12px;
}

.pricing-card .btn {
    width: 100%;
}

/* Footer */
.footer {
    padding: 80px 0 40px;
    background-color: #111827; /* Very dark grey/black */
    color: #D1D5DB; /* Light grey text */
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
}

.footer-logo {
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 24px;
}

.footer-col h4 {
    color: white;
    margin-bottom: 24px;
    font-weight: 600;
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col a {
    color: #9CA3AF;
}

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

.contact-link {
    display: block;
    margin-top: 16px;
    color: #9CA3AF;
}

/* Responsiveness */
@media (max-width: 900px) {
    .header .nav {
        display: none; /* Simple hiding for now, JS toggles in real app */
    }

    .hero-container {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }

    .hero-sub {
        margin: 0 auto 32px;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }

    .footer-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .pricing-card.recommended {
        transform: scale(1);
    }
}