* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    -webkit-user-drag: none;
}

:root {
    --primary: #3B82F6;
    --secondary: #0EA5E9;
    --accent: #8B5CF6;
    --chart-2: #10B981;
    --chart-3: #F59E0B;
    --foreground: #000000;
    --background: #FFFFFF;
    --muted: #F3F4F6;
    --muted-foreground: #6B7280;
    --border: #E5E7EB;
    --card-bg: #FFFFFF;
}

html[data-theme="dark"] {
    --foreground: #FFFFFF;
    --background: #0F172A;
    --muted: #1E293B;
    --muted-foreground: #94A3B8;
    --border: #334155;
    --card-bg: #1E293B;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--foreground);
    background-color: var(--background);
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
header {
    position: sticky;
    top: 0;
    z-index: 50;
    background-color: var(--background);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
}

nav {
    display: flex;
    gap: 32px;
    align-items: center;
    flex: 1;
    margin: 0 32px;
}

nav a {
    color: var(--muted-foreground);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.theme-toggle {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 18px;
    padding: 8px;
    opacity: 0.7;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.theme-toggle:hover {
    opacity: 1;
    transform: scale(1.1);
}

.btn {
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    border: none;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background-color: #2563EB;
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: #FFFFFF;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

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

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

.btn-white:hover {
    background-color: #F3F4F6;
}

.mobile-menu {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 24px;
    color: var(--foreground);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 80px 24px;
    background: linear-gradient(135deg, #1a3a52 0%, #2d5a7f 100%);
    color: #FFFFFF;
}

.hero h1 {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 24px;
    line-height: 1.2;
    max-width: 800px;
}

.hero > p {
    font-size: 20px;
    margin-bottom: 24px;
    opacity: 0.9;
    max-width: 800px;
}

.hero-subtitle {
    font-size: 16px;
    opacity: 0.85;
    margin-bottom: 32px;
    max-width: 800px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
    opacity: 0.9;
}

.stat {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--chart-2);
    display: inline-block;
}

/* CEO Equation */
.ceo-equation {
    padding: 64px 24px;
    background-color: var(--background);
}

.ceo-equation h2 {
    font-size: 36px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 16px;
    color: var(--foreground);
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--muted-foreground);
    margin-bottom: 48px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.ceo-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 32px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto 48px;
}

.ceo-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    padding: 32px;
    border-radius: 12px;
}

.ceo-card h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--primary);
}

.ceo-card.highlight {
    background-color: rgba(59, 130, 246, 0.05);
    border-color: rgba(59, 130, 246, 0.2);
}

.ceo-item {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    align-items: flex-start;
}

.ceo-item .icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    flex-shrink: 0;
}

.ceo-item.problem .icon {
    color: #EF4444;
}

.ceo-item.solution .icon {
    color: var(--chart-2);
}

.ceo-item .label {
    font-weight: 600;
    color: var(--foreground);
    margin-bottom: 4px;
}

.ceo-item .desc {
    font-size: 14px;
    color: var(--muted-foreground);
}

.arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: var(--primary);
}

.ceo-result {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
    border: 1px solid rgba(59, 130, 246, 0.2);
    padding: 24px;
    border-radius: 12px;
    text-align: center;
    font-size: 18px;
    font-weight: 600;
    max-width: 1200px;
    margin: 0 auto;
}

.ceo-result span {
    color: var(--primary);
}

/* Engagement Preview */
.engagement-preview {
    padding: 64px 24px;
    background-color: var(--muted);
}

.engagement-preview h2 {
    font-size: 36px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 16px;
    color: var(--foreground);
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.model-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.model-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.model-card .icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    background-color: rgba(59, 130, 246, 0.1);
    border-radius: 8px;
    margin-bottom: 16px;
}

.model-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--foreground);
}

.model-card > p {
    color: var(--muted-foreground);
    margin-bottom: 16px;
    font-size: 15px;
}

.model-card ul {
    list-style: none;
    padding: 0;
    margin-bottom: 16px;
}

.model-card li {
    padding: 8px 0;
    color: var(--muted-foreground);
    font-size: 14px;
}

.model-card li::before {
    content: "•";
    color: var(--primary);
    font-weight: 700;
    margin-right: 8px;
}

.learn-more {
    display: inline-flex;
    gap: 8px;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: gap 0.3s ease;
}

.learn-more:hover {
    gap: 12px;
}

/* Engagement Full */
.engagement-full {
    padding: 64px 24px;
    background-color: var(--background);
}

.engagement-full h2 {
    font-size: 36px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 16px;
    color: var(--foreground);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.solution-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    transition: transform 0.3s ease;
}

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

.solution-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    background-color: rgba(59, 130, 246, 0.1);
    border-radius: 8px;
    margin-bottom: 16px;
    flex-shrink: 0;
}

.solution-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--foreground);
    margin-bottom: 12px;
}

.solution-card > p {
    color: var(--muted-foreground);
    margin-bottom: 16px;
    font-size: 15px;
}

.solution-card ul {
    list-style: none;
}

.solution-card li {
    padding: 12px 0;
    color: var(--muted-foreground);
    font-size: 14px;
    display: flex;
    gap: 8px;
    align-items: flex-start;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.solution-card li:last-child {
    border-bottom: none;
}

.solution-card li::before {
    content: "•";
    color: var(--primary);
    font-weight: 700;
    flex-shrink: 0;
}

/* Tech Solutions */
.tech-solutions {
    padding: 64px 24px;
    background-color: var(--muted);
}

.tech-solutions h2 {
    font-size: 36px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 16px;
    color: var(--foreground);
}

.tech-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.tech-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
}

.tech-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--foreground);
}

.tech-card > p {
    color: var(--muted-foreground);
    margin-bottom: 16px;
    font-size: 15px;
}

.tech-card ul {
    list-style: none;
}

.tech-card li {
    padding: 8px 0;
    color: var(--muted-foreground);
    font-size: 14px;
    margin-bottom: 8px;
}

/* Success Stories */
.success-stories {
    padding: 64px 24px;
    background-color: var(--background);
}

.success-stories h2 {
    font-size: 36px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 16px;
    color: var(--foreground);
}

.stories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
    max-width: 1200px;
    margin: 0 auto;
}

.story-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.story-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.1);
}

.story-header {
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--primary);
}

.story-header h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.story-header > p {
    font-size: 13px;
    color: var(--muted-foreground);
    font-weight: 500;
}

.story-content h4 {
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--foreground);
}

.story-content ul {
    list-style: none;
    margin-bottom: 24px;
}

.story-content li {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--muted-foreground);
    align-items: flex-start;
}

.story-content li::before {
    content: "•";
    color: var(--chart-2);
    font-weight: 700;
    flex-shrink: 0;
}

.story-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    padding: 16px;
    background-color: rgba(59, 130, 246, 0.05);
    border-radius: 8px;
    text-align: center;
}

.metric .value {
    display: block;
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.metric .label {
    display: block;
    font-size: 12px;
    color: var(--muted-foreground);
    text-transform: uppercase;
    font-weight: 600;
}

/* Contact */
.contact {
    padding: 64px 24px;
    background-color: var(--muted);
}

.contact h2 {
    font-size: 36px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 16px;
    color: var(--foreground);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    max-width: 1200px;
    margin: 0 auto;
}

.contact-form-box {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
}

.contact-form-box h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--foreground);
}

.contact-form-box > p {
    color: var(--muted-foreground);
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
    color: var(--foreground);
    font-size: 14px;
}

.form-group input,
.form-group textarea {
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 14px;
    background-color: var(--background);
    color: var(--foreground);
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.contact-info {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.info-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    text-align: center;
}

.info-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.info-card h4 {
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--foreground);
}

.info-card a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.info-card a:hover {
    color: var(--secondary);
}

/* CTA Section */
.cta {
    padding: 64px 24px;
    text-align: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: #FFFFFF;
}

.cta h2 {
    font-size: 36px;
    font-weight: 600;
    margin-bottom: 16px;
}

.cta > p {
    font-size: 18px;
    margin-bottom: 32px;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Footer */
footer {
    background-color: #1F2937;
    color: #FFFFFF;
    padding: 64px 24px 32px;
    margin-top: 80px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    margin-bottom: 48px;
}

.footer-section h4 {
    font-weight: 600;
    margin-bottom: 16px;
    color: #FFFFFF;
}

.footer-section p {
    color: #9CA3AF;
    margin-bottom: 12px;
    font-size: 14px;
}

.footer-section a {
    display: block;
    color: #9CA3AF;
    text-decoration: none;
    margin-bottom: 8px;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #FFFFFF;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    color: #9CA3AF;
    margin-bottom: 8px;
    font-size: 14px;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 32px;
    text-align: center;
    color: #9CA3AF;
    font-size: 14px;
}

.bg-muted {
    background-color: var(--muted);
}

.bg-primary {
    background-color: var(--primary);
    color: #FFFFFF;
}

/* Responsive */
@media (max-width: 768px) {
    nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 16px;
        background-color: var(--background);
        border-bottom: 1px solid var(--border);
        padding: 16px;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease, opacity 0.3s ease;
        opacity: 0;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }

    nav.mobile-open {
        display: flex;
        max-height: 500px;
        opacity: 1;
    }

    .mobile-menu {
        display: block;
    }

    .hero h1 {
        font-size: 36px;
    }

    .hero > p {
        font-size: 16px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-buttons .btn {
        width: 100%;
        text-align: center;
    }

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

    .arrow {
        transform: rotate(90deg);
    }

    .hero-stats {
        flex-direction: column;
        gap: 16px;
    }

    h2 {
        font-size: 28px;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .tech-cards {
        grid-template-columns: 1fr;
    }

    .story-metrics {
        grid-template-columns: 1fr;
    }

    .cta h2 {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .header-content {
        padding: 12px 16px;
    }

    .logo {
        font-size: 16px;
    }

    nav {
        gap: 16px;
        margin: 0 16px;
    }

    nav a {
        font-size: 12px;
    }

    .hero {
        min-height: 400px;
        padding: 40px 16px;
    }

    .hero h1 {
        font-size: 24px;
    }

    .hero > p {
        font-size: 14px;
    }

    .btn {
        padding: 10px 16px;
        font-size: 12px;
    }

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

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

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

    .tech-cards {
        grid-template-columns: 1fr;
    }

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

    section {
        padding: 40px 16px;
    }
}