:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --text-color: #1f2937;
    --light-text: #6b7280;
    --background: #ffffff;
    --section-bg: #f3f4f6;
}

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

html {
    scroll-behavior: smooth;
}

.scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--primary-color);
    color: white;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-3px);
    background: var(--secondary-color);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.header {
    position: fixed;
    width: 100%;
    background: var(--background);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: transform 0.3s ease;
}

.header.scrolled {
    transform: translateY(-100%);
}

.header:hover {
    transform: translateY(0);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

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

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

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

.mobile-nav-toggle {
    display: none;
}

.hero {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    background-size: 200% 200%;
    color: white;
    text-align: center;
    animation: gradientMove 10s ease infinite;
}

@keyframes gradientMove {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
}

.cta-button {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    background: white;
    color: var(--primary-color);
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.cta-button:hover {
    transform: translateY(-2px);
}

.features {
    padding: 4rem 0;
    background: var(--section-bg);
}

.features h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact {
    padding: 4rem 0;
}

.contact h2 {
    text-align: center;
    margin-bottom: 2rem;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-form input,
.contact-form textarea {
    padding: 0.8rem;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    transition: all 0.3s ease;
    outline: none;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.contact-form input:hover,
.contact-form textarea:hover {
    border-color: var(--primary-color);
}

.contact-form textarea {
    height: 150px;
    resize: vertical;
}

.submit-button {
    padding: 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.submit-button:hover {
    background: var(--secondary-color);
}

.testimonials {
    padding: 4rem 0;
    background: var(--section-bg);
}

.testimonials h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.testimonial-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.testimonial-text {
    font-style: italic;
    margin-bottom: 1rem;
}

.testimonial-author {
    font-weight: bold;
    color: var(--primary-color);
}

.footer {
    background: var(--text-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin: 1rem 0;
}

.social-links a {
    color: white;
    text-decoration: none;
    font-size: 1.5rem;
    transition: color 0.3s ease;
}

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--background);
        flex-direction: column;
        padding: 2rem;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        text-align: center;
        transform: translateY(-100%);
        opacity: 0;
        transition: transform 0.3s ease, opacity 0.3s ease;
    }

    .nav-links.active {
        display: flex;
        transform: translateY(0);
        opacity: 1;
    }

    .mobile-nav-toggle {
        display: block;
        background: none;
        border: none;
        cursor: pointer;
    }

    .mobile-nav-toggle span {
        display: block;
        width: 25px;
        height: 3px;
        background: var(--text-color);
        margin: 5px 0;
        transition: 0.3s;
        position: relative;
    }

    .mobile-nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

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

    .mobile-nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .hero h1 {
        font-size: 2.5rem;
    }

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