:root {
    --background-light: #F9FAFB;
    --text-light: #1F2937;
    --header-bg-light: #FFFFFF;
    --border-light: #E5E7EB;
    --primary-accent: #FF50DE;
    --link-light: #D946EF;
    --metadata-light: #6B7280;
    --gradient-start-light: rgba(236, 72, 153, 0.1);
    --gradient-end-light: rgba(139, 92, 246, 0.1);

    --background-dark: #111827;
    --text-dark: #E5E7EB;
    --header-bg-dark: #1F2937;
    --border-dark: #374151;
    --link-dark: #F472B6;
    --metadata-dark: #9CA3AF;
    --gradient-start-dark: rgba(236, 72, 153, 0.15);
    --gradient-end-dark: rgba(29, 78, 216, 0.2);
}

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

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background-color: var(--background-light);
    color: var(--text-light);
    line-height: 1.7;
    transition: background-color 0.3s, color 0.3s;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    background: linear-gradient(135deg, var(--gradient-start-light), var(--gradient-end-light), var(--background-light));
    background-size: 400% 400%;
    animation: gradientAnimation 25s ease infinite;
    transition: background 0.3s;
}

@media (prefers-color-scheme: dark) {
    body {
        background-color: var(--background-dark);
        color: var(--text-dark);
    }
    body::before {
        background: linear-gradient(135deg, var(--gradient-start-dark), var(--gradient-end-dark), var(--background-dark));
        background-size: 400% 400%;
    }
}

.header {
    background-color: var(--header-bg-light);
    border-bottom: 1px solid var(--border-light);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 10;
    transition: background-color 0.3s, border-color 0.3s;
}

@media (prefers-color-scheme: dark) {
    .header {
        background-color: var(--header-bg-dark);
        border-bottom-color: var(--border-dark);
    }
}

.header-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    height: 40px;
    width: auto;
}

h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-light);
    transition: border-color 0.3s;
}

@media (prefers-color-scheme: dark) {
    .content h2 {
        border-bottom-color: var(--border-dark);
    }
}

.content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.content p, .content li {
    font-size: 1rem;
    margin-bottom: 1rem;
}

.content ul {
    padding-left: 1.5rem;
}

.content a {
    color: var(--link-light);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
}

@media (prefers-color-scheme: dark) {
    .content a {
        color: var(--link-dark);
    }
}

.content a:hover {
    text-decoration: underline;
}

.content strong {
    font-weight: 600;
}

.metadata {
    color: var(--metadata-light);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    transition: color 0.3s;
}

@media (prefers-color-scheme: dark) {
    .metadata {
        color: var(--metadata-dark);
    }
}

.footer {
    padding: 2rem 1.5rem;
    margin-top: 2rem;
    border-top: 1px solid var(--border-light);
    transition: border-color 0.3s, color 0.3s;
}

@media (prefers-color-scheme: dark) {
    .footer {
        border-top-color: var(--border-dark);
    }
}

.footer-content {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.footer-logo {
    height: 32px;
    width: auto;
}

.footer-text {
    text-align: left;
}

.footer-product-name {
    margin: 0;
    font-weight: 600;
    color: var(--text-light);
}

.footer-copyright {
    margin: 0;
    font-size: 0.9rem;
    color: var(--metadata-light);
}

@media (prefers-color-scheme: dark) {
    .footer-product-name {
        color: var(--text-dark);
    }
    .footer-copyright {
        color: var(--metadata-dark);
    }
}