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

:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1e40af;
    --color-text: #1f2937;
    --color-text-light: #6b7280;
    --color-background: #ffffff;
    --color-background-alt: #f9fafb;
    --color-border: #e5e7eb;
    --max-width: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

header {
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    padding: var(--spacing-sm) 0;
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.nav-menu a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-xs) 0;
    border-bottom: 2px solid transparent;
    transition: border-color 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a:focus {
    border-bottom-color: var(--color-primary);
    outline: none;
}

.nav-menu a.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.nav-menu a:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.hero-text {
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.7;
}

.page-header {
    background-color: var(--color-background-alt);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.page-intro {
    font-size: 1.125rem;
    color: var(--color-text-light);
}

.content-section {
    padding: var(--spacing-xl) 0;
}

.content-section.alt-bg {
    background-color: var(--color-background-alt);
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    align-items: center;
}

.content-text h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.content-text p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-light);
    line-height: 1.7;
}

.content-text p:last-child {
    margin-bottom: 0;
}

.content-image img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    display: block;
}

.info-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.info-card {
    padding: var(--spacing-md);
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: 8px;
}

.info-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.info-card p {
    color: var(--color-text-light);
    line-height: 1.6;
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.feature-card {
    padding: var(--spacing-md);
    background-color: var(--color-background);
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--color-primary);
}

.feature-card p {
    color: var(--color-text-light);
    line-height: 1.6;
}

.notice-section {
    background-color: var(--color-background-alt);
    padding: var(--spacing-md) 0;
}

.notice {
    text-align: center;
    color: var(--color-text-light);
    font-size: 0.875rem;
    font-style: italic;
}

.cta-section {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.cta-section h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.cta-section p {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.cta-button {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: white;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    border-radius: 6px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cta-button:hover,
.cta-button:focus {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    outline: none;
}

.cta-button:focus-visible {
    outline: 2px solid white;
    outline-offset: 4px;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.contact-info h2,
.contact-form-wrapper h2 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
    font-weight: 700;
}

.contact-item {
    margin-bottom: var(--spacing-md);
}

.contact-item h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--color-primary);
}

.contact-item p {
    color: var(--color-text-light);
    line-height: 1.6;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--color-text);
}

.form-group input,
.form-group textarea {
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.submit-button {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.submit-button:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
}

.submit-button:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

.legal-content {
    max-width: 800px;
    margin: 0 auto;
}

.legal-content h2 {
    font-size: 1.5rem;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.legal-content h2:first-child {
    margin-top: 0;
}

.legal-content p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-light);
    line-height: 1.7;
}

footer {
    background-color: var(--color-text);
    color: white;
    padding: var(--spacing-md) 0;
    margin-top: auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.footer-nav {
    display: flex;
    gap: var(--spacing-md);
}

.footer-nav a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.footer-nav a:hover,
.footer-nav a:focus {
    opacity: 0.8;
    outline: none;
}

.footer-nav a:focus-visible {
    outline: 2px solid white;
    outline-offset: 4px;
}

@media (min-width: 768px) {
    .content-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
    }

    .content-grid.reverse {
        direction: rtl;
    }

    .content-grid.reverse > * {
        direction: ltr;
    }

    .info-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-wrapper {
        grid-template-columns: 1fr 1.5fr;
    }

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

    .page-header h1 {
        font-size: 3rem;
    }
}

@media (max-width: 767px) {
    nav .container {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav-menu {
        width: 100%;
        gap: var(--spacing-sm);
    }

    .hero h1 {
        font-size: 2rem;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .content-text h2 {
        font-size: 1.5rem;
    }
}

@media (min-width: 360px) {
    html {
        font-size: 16px;
    }
}