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

:root {
    --primary-color: #4285f4;
    --secondary-color: #34a853;
    --accent-color: #fbbc04;
    --text-dark: #202124;
    --text-light: #5f6368;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-hover: 0 5px 20px rgba(0,0,0,0.15);
}

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

/* navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: var(--bg-white);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.logo-icon {
    width: 40px;
    height: 40px;
    margin-right: 10px;
    background-color: var(--primary-color);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

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

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

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

.nav-cta {
    background-color: var(--primary-color);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 24px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-cta:hover {
    background-color: #3367d6;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(66, 133, 244, 0.3);
}

/* main */
main {
    margin-top: 80px;
}

/* hero */
.hero {
    padding: 5rem 2rem;
    text-align: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
}

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

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
    font-weight: 700;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto 2.5rem;
}

.hero-cta {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 2.5rem;
    border-radius: 30px;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(66, 133, 244, 0.3);
}

.hero-cta:hover {
    background-color: #3367d6;
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(66, 133, 244, 0.4);
}

.hero-image {
    margin-top: 3rem;
    max-width: 100%;
    border-radius: 12px;
    box-shadow: var(--shadow-hover);
}

/* features */
.features {
    padding: 5rem 2rem;
    background-color: var(--bg-white);
}

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

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background-color: var(--bg-white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

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

.feature-icon {
    width: 60px;
    height: 60px;
    background-color: rgba(66, 133, 244, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    color: var(--primary-color);
}

.feature-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.feature-description {
    color: var(--text-light);
    line-height: 1.6;
    flex-grow: 1;
}

/* use cases */
.products {
    padding: 5rem 2rem;
    background-color: var(--bg-light);
}

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

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.use-case-card {
    background-color: var(--bg-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.use-case-card * {
    text-decoration: none !important;
}

.use-case-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.use-case-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.use-case-content {
    padding: 1.5rem;
}

.use-case-title {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.use-case-description {
    color: var(--text-light);
    line-height: 1.6;
}

/* contact section */
.contact {
    padding: 5rem 2rem;
    background-color: var(--bg-white);
}

.contact-container {
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

.contact-icon {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.contact-title {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.contact-description {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto;
}

.contact-description-2 {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto;
    text-align: left;
}

/* testimonials */
.testimonials {
    padding: 5rem 2rem;
    background-color: var(--bg-light);
}

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

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.testimonial-card {
    background-color: var(--bg-white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;

    display: flex;
    flex-direction: column;
    height: 100%;
}

.testimonial-card-2 {
    background-color: var(--bg-white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    width: 40%;
    margin: 0 auto;
}

.testimonial-card-2 * {
    text-decoration: none !important;
}

.testimonial-card:hover, .testimonial-card-2:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.testimonial-text {
    font-style: italic;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    line-height: 1.6;

    flex-grow: 1;
}

.testimonial-author {
    display: flex;
    align-items: center;

    margin-top: auto;
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    margin-right: 1rem;
    object-fit: cover;
}

.author-avatar-2 {
    width: 50px;
    height: 50px;
    border-radius: 10%;
    margin-right: 1rem;
    object-fit: cover;
}

.author-info {
    flex-grow: 1;
}

.author-name {
    font-weight: 600;
    color: var(--text-dark);
}

.author-title {
    color: var(--text-light);
    font-size: 0.9rem;
}

.rating {
    color: var(--accent-color);
    margin-top: 0.5rem;
}

/* product details */
.product-details {
    padding: 5rem 2rem;
    background-color: var(--bg-white);
}

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

.product-overview {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 5rem;
    align-items: center;
}

.product-image {
    width: 100%;
    border-radius: 12px;
    box-shadow: var(--shadow-hover);
}

.product-info h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.product-description {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.7;
}

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

.product-features li {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.product-features li::before {
    content: "✓";
    color: var(--secondary-color);
    font-weight: bold;
    margin-right: 1rem;
    font-size: 1.2rem;
}

.product-cta {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 2.5rem;
    border-radius: 30px;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(66, 133, 244, 0.3);
    margin-right: 1rem;
}

.product-cta:hover {
    background-color: #3367d6;
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(66, 133, 244, 0.4);
}

.product-secondary-cta {
    display: inline-block;
    background-color: transparent;
    color: var(--primary-color);
    padding: 1rem 2.5rem;
    border-radius: 30px;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    border: 2px solid var(--primary-color);
    transition: all 0.3s ease;
}

.product-secondary-cta:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

/* faq */
.faq {
    padding: 5rem 2rem;
    background-color: var(--bg-light);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--bg-white);
    border-radius: 12px;
    margin-bottom: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.faq-question {
    padding: 1.5rem;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.faq-question:hover {
    background-color: rgba(66, 133, 244, 0.05);
}

.faq-question::after {
    content: "+";
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.faq-question.active::after {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    color: var(--text-light);
    line-height: 1.7;
}

.faq-answer.active {
    padding: 0 1.5rem 1.5rem;
    max-height: 500px;
}

/* cta */
.cta {
    padding: 5rem 2rem;
    background: linear-gradient(135deg, #4285f4 0%, #34a853 100%);
    color: white;
    text-align: center;
}

.cta-container {
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.cta-description {
    font-size: 1.2rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

.cta-button {
    display: inline-block;
    background-color: white;
    color: var(--primary-color);
    padding: 1rem 2.5rem;
    border-radius: 30px;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

/* footer */
footer {
    background-color: var(--text-dark);
    color: white;
    padding: 3rem 2rem 1.5rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-column h3 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

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

.social-link {
    width: 36px;
    height: 36px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
}

/* mobile menu button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    margin: 5px 0;
    transition: all 0.3s ease;
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }

    .nav-links {
        display: none;
    }

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

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 2rem;
    }

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

    .testimonial-card-2 {
        background-color: var(--bg-white);
        border-radius: 12px;
        padding: 2rem;
        box-shadow: var(--shadow);
        transition: all 0.3s ease;
        width: 80%;
        margin: 0 auto;
    }

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

    .social-links {
        justify-content: center;
    }

    .product-overview {
        grid-template-columns: 1fr;
    }
}

/* animation */
.fade-in {
    animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}