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

:root {
    --primary-color: #000000;
    --primary-dark: #000000;
    --secondary-color: #333333;
    --text-dark: #000000;
    --text-light: #666666;
    --bg-light: #f8f8f8;
    --bg-white: #ffffff;
    --border-color: #e0e0e0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
header {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 700;
    letter-spacing: -0.5px;
}

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

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

.nav-links a:hover {
    opacity: 0.6;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 3px;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

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

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

.cta-button {
    background: var(--primary-color);
    color: white !important;
    padding: 0.75rem 1.5rem;
    border-radius: 0.375rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: 2px solid var(--primary-color);
}

.cta-button:hover {
    background: var(--bg-white);
    color: var(--primary-color) !important;
}

.cta-button.secondary {
    background: transparent;
    color: var(--primary-color) !important;
    border: 2px solid var(--primary-color);
}

.cta-button.secondary:hover {
    background: var(--primary-color);
    color: white !important;
}

.cta-button.large {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

/* Hero Section */
.hero {
    padding: 6rem 0;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
}

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

.hero-content h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    font-weight: 700;
    letter-spacing: -1px;
}

.subtitle {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    color: var(--text-light);
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-buttons .cta-button.primary {
    background: var(--primary-color);
    color: white !important;
}

.hero-buttons .cta-button.secondary {
    background: transparent;
    color: var(--primary-color) !important;
    border: 2px solid var(--primary-color);
}

/* Extension Mockup */
.extension-mockup {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    overflow: hidden;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
}

.mockup-header {
    background: var(--bg-light);
    padding: 0.75rem 1rem;
    display: flex;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #d1d5db;
}

.mockup-toolbar {
    background: var(--bg-white);
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.url-bar {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 0.5rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.lock-icon {
    font-size: 0.75rem;
    opacity: 0.7;
}

.url-text {
    color: var(--text-light);
    font-family: 'Courier New', monospace;
}

.mockup-content {
    padding: 2rem;
    color: var(--text-dark);
}

.detected-tech {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.detected-tech:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.detected-tech h3 {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
}

.detected-tech p {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary-color);
}

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

.features h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1.125rem;
    margin-bottom: 4rem;
}

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

.feature-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.feature-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
    font-weight: 600;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* How It Works Section */
.how-it-works {
    padding: 6rem 0;
    background: var(--bg-white);
}

.how-it-works h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
}

.step {
    text-align: center;
    padding: 2rem;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1.5rem;
}

.step h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.step p {
    color: var(--text-light);
    line-height: 1.7;
}

/* CTA Section */
.cta-section {
    padding: 6rem 0;
    background: var(--primary-color);
    color: white;
    text-align: center;
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.cta-section p {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

.cta-section .cta-button {
    background: var(--bg-white);
    color: var(--primary-color) !important;
    border-color: var(--bg-white);
}

.cta-section .cta-button:hover {
    background: transparent;
    color: white !important;
    border-color: white;
}

.small-text {
    font-size: 0.875rem;
    margin-top: 1.5rem;
    opacity: 0.8;
}

/* Footer */
footer {
    background: var(--bg-light);
    color: var(--text-dark);
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.footer-section h4 {
    font-size: 1rem;
    margin-bottom: 1rem;
    font-weight: 600;
    color: var(--text-dark);
}

.footer-section p {
    color: var(--text-light);
    line-height: 1.7;
}

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

.footer-section ul li {
    margin-bottom: 0.75rem;
}

.footer-section a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--text-dark);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
    text-align: center;
    color: var(--text-light);
    font-size: 0.875rem;
}

/* Comparison Grid */
.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.comparison-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
}

.comparison-card h3 {
    font-size: 1.75rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
    font-weight: 700;
    text-align: center;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--primary-color);
}

.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    padding: 1rem 0;
    border-bottom: 1px solid var(--bg-light);
    color: var(--text-light);
    line-height: 1.6;
}

.feature-list li:last-child {
    border-bottom: none;
}

.feature-list li strong {
    color: var(--text-dark);
    font-weight: 600;
}

/* FAQ Section */
.faq-container {
    max-width: 800px;
    margin: 3rem auto 0;
}

.faq-item {
    background: var(--bg-white);
    padding: 2rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
}

.faq-item h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
    font-weight: 600;
}

.faq-item p {
    color: var(--text-light);
    line-height: 1.7;
    margin: 0;
}

/* Tech Categories */
.tech-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.tech-category {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 0.5rem;
    border-left: 3px solid var(--primary-color);
}

.tech-category h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
    font-weight: 600;
}

.tech-category p {
    color: var(--text-light);
    line-height: 1.7;
    margin: 0;
}

/* Responsive Design */
@media (max-width: 968px) {
    .container {
        padding: 0 1rem;
    }

    /* Mobile Navigation */
    .mobile-menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        height: 100vh;
        width: 280px;
        background: var(--bg-white);
        flex-direction: column;
        align-items: flex-start;
        padding: 5rem 2rem 2rem;
        gap: 2rem;
        box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
        transition: right 0.3s ease;
        z-index: 1000;
        border-left: 1px solid var(--border-color);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        width: 100%;
        padding: 0.75rem 0;
        font-size: 1.125rem;
    }

    .nav-links .cta-button {
        width: 100%;
        text-align: center;
        margin-top: 1rem;
    }

    /* Hero Section */
    .hero {
        padding: 3rem 0;
    }

    .hero .container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-content h1 {
        font-size: 2rem;
        margin-bottom: 1rem;
    }

    .subtitle {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .hero-buttons .cta-button {
        width: 100%;
        text-align: center;
        justify-content: center;
    }

    .hero-image {
        order: -1;
    }

    .extension-mockup {
        max-width: 100%;
        margin: 0 auto;
    }

    /* Features Section */
    .features {
        padding: 3rem 0;
    }

    .features h2 {
        font-size: 1.75rem;
        margin-bottom: 0.5rem;
    }

    .section-subtitle {
        font-size: 1rem;
        margin-bottom: 2rem;
    }

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

    .feature-card {
        padding: 1.5rem;
    }

    .feature-card h3 {
        font-size: 1.25rem;
    }

    .feature-icon {
        font-size: 2rem;
        margin-bottom: 1rem;
    }

    /* How It Works */
    .how-it-works {
        padding: 3rem 0;
    }

    .how-it-works h2 {
        font-size: 1.75rem;
    }

    .steps {
        grid-template-columns: 1fr;
        gap: 2rem;
        margin-top: 2rem;
    }

    .step {
        padding: 1rem;
    }

    .step-number {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
        margin-bottom: 1rem;
    }

    .step h3 {
        font-size: 1.125rem;
    }

    /* CTA Section */
    .cta-section {
        padding: 3rem 0;
    }

    .cta-section h2 {
        font-size: 1.75rem;
    }

    .cta-section p {
        font-size: 1rem;
        margin-bottom: 2rem;
    }

    .cta-button.large {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
        width: 100%;
        max-width: 100%;
    }

    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        margin-bottom: 2rem;
    }

    /* Comparison and Tech Categories */
    .comparison-grid,
    .tech-categories {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .comparison-card {
        padding: 1.5rem;
    }

    .comparison-card h3 {
        font-size: 1.5rem;
    }

    /* FAQ */
    .faq-item {
        padding: 1.5rem;
    }

    .faq-item h3 {
        font-size: 1.125rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }

    nav .container {
        padding: 0.75rem;
    }

    .logo h1 {
        font-size: 1.25rem;
    }

    .hero-content h1 {
        font-size: 1.75rem;
    }

    .subtitle {
        font-size: 0.9375rem;
    }

    .features h2,
    .how-it-works h2,
    .cta-section h2 {
        font-size: 1.5rem;
    }

    .section-subtitle {
        font-size: 0.9375rem;
    }

    .cta-button {
        padding: 0.625rem 1.25rem;
        font-size: 0.9375rem;
    }

    .feature-card,
    .faq-item {
        padding: 1.25rem;
    }

    .mockup-content {
        padding: 1.5rem;
    }

    .detected-tech {
        margin-bottom: 1rem;
        padding-bottom: 1rem;
    }

    .nav-links {
        width: 100%;
        right: -100%;
    }
}