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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #0f172a;
    --accent: #06b6d4;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --white: #ffffff;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --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);
    --radius: 0.5rem;
    --radius-lg: 1rem;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-700);
    background: var(--white);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

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

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.5rem; }

.section-title {
    text-align: center;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: var(--gray-500);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto 3rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

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

.btn-secondary {
    background: var(--white);
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
}

.btn-secondary:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--gray-900);
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 700;
}

.logo svg {
    color: var(--primary);
}

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

.nav-links a {
    color: var(--gray-600);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    transition: all 0.3s;
}

/* Hero Section */
.hero {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

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

.hero-content h1 {
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--gray-900) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.hero-platforms {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--gray-500);
    font-size: 0.875rem;
}

.platforms {
    display: flex;
    gap: 0.5rem;
}

.platform {
    padding: 0.25rem 0.75rem;
    background: var(--gray-100);
    border-radius: 9999px;
    font-weight: 500;
}

/* Browser Mockup */
.browser-mockup {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

.browser-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    background: var(--gray-100);
    border-bottom: 1px solid var(--gray-200);
}

.browser-dots {
    display: flex;
    gap: 0.5rem;
}

.browser-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gray-300);
}

.browser-dots span:first-child { background: #ef4444; }
.browser-dots span:nth-child(2) { background: #f59e0b; }
.browser-dots span:last-child { background: #10b981; }

.browser-url {
    flex: 1;
    padding: 0.5rem 1rem;
    background: var(--white);
    border-radius: var(--radius);
    font-size: 0.875rem;
    color: var(--gray-500);
}

.browser-content {
    padding: 4rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: var(--white);
}

.shield-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 1rem;
}

.shield-icon svg {
    width: 100%;
    height: 100%;
}

.browser-content p {
    font-size: 1.25rem;
    font-weight: 600;
}

/* Features Section */
.features {
    padding: 6rem 0;
    background: var(--white);
}

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

.feature-card {
    padding: 2rem;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--primary);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.feature-icon svg {
    width: 24px;
    height: 24px;
    color: var(--white);
}

.feature-card h3 {
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--gray-600);
    font-size: 0.9375rem;
}

/* Architecture Section */
.architecture {
    padding: 6rem 0;
    background: var(--gray-50);
}

.architecture-diagram {
    max-width: 900px;
    margin: 0 auto 3rem;
}

.arch-layer {
    margin-bottom: 1rem;
}

.arch-layer-label {
    text-align: center;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray-500);
    margin-bottom: 1rem;
}

.arch-nodes {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.arch-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.5rem;
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    min-width: 120px;
    transition: all 0.3s ease;
}

.arch-node:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.arch-node svg {
    width: 32px;
    height: 32px;
    color: var(--primary);
}

.arch-node span {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
}

.arch-node.cloud svg {
    color: var(--accent);
}

.arch-arrow {
    display: flex;
    justify-content: center;
    padding: 1rem 0;
}

.arch-arrow svg {
    width: 24px;
    height: 24px;
    color: var(--gray-400);
}

.browser-layer {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin: 1rem 0;
}

.browser-layer .arch-layer-label {
    color: rgba(255, 255, 255, 0.8);
}

.arch-browser {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.arch-browser-item {
    text-align: center;
    color: var(--white);
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    min-width: 150px;
}

.arch-browser-item strong {
    display: block;
    font-size: 0.9375rem;
    margin-bottom: 0.25rem;
}

.arch-browser-item span {
    font-size: 0.8125rem;
    opacity: 0.8;
}

.arch-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.arch-feature {
    text-align: center;
    padding: 1.5rem;
}

.arch-feature-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 1rem;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.arch-feature-icon svg {
    width: 24px;
    height: 24px;
    color: var(--white);
}

.arch-feature h4 {
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.arch-feature p {
    font-size: 0.875rem;
    color: var(--gray-600);
}

@media (max-width: 768px) {
    .arch-nodes {
        gap: 1rem;
    }

    .arch-node {
        min-width: 100px;
        padding: 1rem;
    }

    .arch-browser {
        flex-direction: column;
        align-items: center;
    }

    .arch-features {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
}

/* Pricing Section */
.pricing {
    padding: 6rem 0;
    background: var(--gray-50);
}

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

.pricing-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid var(--gray-200);
    position: relative;
    transition: all 0.3s ease;
}

.pricing-card:hover {
    box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
    border: 2px solid var(--primary);
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: var(--white);
    padding: 0.25rem 1rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.pricing-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.pricing-header h3 {
    margin-bottom: 0.5rem;
}

.pricing-description {
    color: var(--gray-500);
    font-size: 0.875rem;
}

.pricing-price {
    text-align: center;
    margin-bottom: 2rem;
    padding: 1.5rem 0;
    border-top: 1px solid var(--gray-200);
    border-bottom: 1px solid var(--gray-200);
}

.pricing-price .currency {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-700);
    vertical-align: top;
}

.pricing-price .amount {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1;
}

.pricing-price .period {
    color: var(--gray-500);
    font-size: 0.875rem;
}

.pricing-features {
    list-style: none;
    margin-bottom: 2rem;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
    color: var(--gray-700);
    font-size: 0.9375rem;
}

.pricing-features svg {
    width: 20px;
    height: 20px;
    stroke: var(--success);
    stroke-width: 3;
    fill: none;
}

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

/* Pricing Explainer */
.pricing-explainer {
    max-width: 800px;
    margin: 0 auto 3rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: var(--radius-lg);
    padding: 2rem;
    color: var(--white);
}

.pricing-explainer h3 {
    color: var(--white);
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.pricing-explainer p {
    opacity: 0.9;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.pricing-math {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.math-item {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-size: 0.9375rem;
}

.math-separator {
    font-size: 1.25rem;
    opacity: 0.7;
}

.pricing-note {
    max-width: 700px;
    margin: 2rem auto 0;
    text-align: center;
    padding: 1.5rem;
    background: var(--gray-100);
    border-radius: var(--radius);
    border-left: 4px solid var(--primary);
}

.pricing-note p {
    color: var(--gray-600);
    font-size: 0.9375rem;
    margin: 0;
}

/* About Section */
.about {
    padding: 6rem 0;
    background: var(--secondary);
    color: var(--white);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about h2 {
    color: var(--white);
    margin-bottom: 1.5rem;
}

.about p {
    color: var(--gray-300);
    font-size: 1.125rem;
    margin-bottom: 1rem;
}

.about-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin-top: 3rem;
    padding-top: 3rem;
    border-top: 1px solid var(--gray-700);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-light);
}

.stat-label {
    color: var(--gray-400);
    font-size: 0.875rem;
}

/* Contact Section */
.contact {
    padding: 6rem 0;
    background: var(--white);
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--gray-700);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    background: var(--white);
    transition: border-color 0.2s, box-shadow 0.2s;
}

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

.contact-form .btn {
    width: 100%;
}

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

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand .logo {
    color: var(--white);
    margin-bottom: 1rem;
}

.footer-brand p {
    font-size: 0.875rem;
    line-height: 1.7;
}

.footer-links h4 {
    color: var(--white);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.footer-links a {
    display: block;
    color: var(--gray-400);
    text-decoration: none;
    font-size: 0.875rem;
    padding: 0.375rem 0;
    transition: color 0.2s;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--gray-800);
    font-size: 0.875rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    color: var(--gray-400);
    transition: color 0.2s;
}

.social-links a:hover {
    color: var(--white);
}

.social-links svg {
    width: 20px;
    height: 20px;
}

/* Responsive Design */
@media (max-width: 1024px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }

    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-platforms {
        justify-content: center;
    }

    .hero-image {
        max-width: 500px;
        margin: 0 auto;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }

    .pricing-card.featured {
        transform: none;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    h1 { font-size: 2rem; }

    .hero {
        padding: 6rem 0 3rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .about-stats {
        flex-direction: column;
        gap: 2rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}