:root {
    --primary-color: #0f172a;
    --secondary-color: #3b82f6;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --bg-light: #f8fafc;
    --white: #ffffff;
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--text-main);
    background-color: var(--bg-light);
    scroll-behavior: smooth;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

header {
    background: var(--white);
    padding: 1.5rem 0;
    border-bottom: 1px solid #e2e8f0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    transition: color 0.3s;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 26px;
    height: 20px;
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    z-index: 1100;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle.open span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

.hero {
    padding: 100px 0;
    text-align: center;
    background: linear-gradient(to bottom, #ffffff, #f1f5f9);
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.tagline {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--secondary-color);
    margin-bottom: 2rem;
}

.hero-description {
    max-width: 700px;
    margin: 0 auto 3rem;
    font-size: 1.25rem;
    color: var(--text-muted);
}

.cta-group {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

.btn {
    padding: 0.8rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

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

.btn.primary:hover {
    background-color: #1e293b;
    transform: translateY(-2px);
}

.btn.secondary {
    background-color: var(--white);
    color: var(--primary-color);
    border: 1px solid #e2e8f0;
}

.btn.secondary:hover {
    background-color: #f8fafc;
    transform: translateY(-2px);
}

.btn.inline {
    display: inline-block;
    margin-top: 1rem;
    font-weight: 600;
    color: var(--secondary-color);
    text-decoration: none;
}

section {
    padding: 80px 0;
    border-bottom: 1px solid #e2e8f0;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.section-subtitle {
    color: var(--text-muted);
    margin-bottom: 3rem;
}

.product-card {
    background: var(--white);
    padding: 3rem;
    border-radius: 1rem;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    border: 1px solid #e2e8f0;
}

.product-card h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.utility-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.utility-item {
    background: var(--white);
    padding: 2rem;
    border-radius: 0.75rem;
    border: 1px solid #e2e8f0;
    transition: transform 0.3s;
}

.utility-item:hover {
    transform: translateY(-5px);
}

.utility-item a {
    font-weight: 700;
    font-size: 1.25rem;
    text-decoration: none;
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: block;
}

footer {
    padding: 40px 0;
    background: var(--primary-color);
    color: var(--white);
    text-align: center;
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 3rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: center;
        gap: 0;
        background: var(--white);
        border-bottom: 1px solid #e2e8f0;
        box-shadow: 0 8px 12px -6px rgb(0 0 0 / 0.1);

        max-height: 0;
        overflow: hidden;
        opacity: 0;
        pointer-events: none;
        transition: max-height 0.3s ease, opacity 0.3s ease;
    }

    .nav-links.open {
        max-height: 300px;
        opacity: 1;
        pointer-events: auto;
    }

    .nav-links li {
        width: 100%;
        text-align: center;
    }

    .nav-links a {
        display: block;
        padding: 1rem 2rem;
    }

    .cta-group {
        flex-direction: column;
    }
}