:root {
    --bg-color: #ffffff;
    --surface-color: #f9f9f9;
    --text-color: #1a1a1a;
    --text-muted: #666666;
    --border-color: #e5e5e5;
    --primary-color: #000000;
    --primary-hover: #333333;
    --nav-border: rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --bg-color: #0f0f11;
    --surface-color: #1a1a1c;
    --text-color: #e5e5e5;
    --text-muted: #a1a1a1;
    --border-color: #333333;
    --primary-color: #ffffff;
    --primary-hover: #cccccc;
    --nav-border: rgba(255, 255, 255, 0.1);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    transition: var(--transition);
    background-image: 
        radial-gradient(circle at 100% 0%, rgba(120, 120, 120, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 0% 100%, rgba(120, 120, 120, 0.05) 0%, transparent 40%);
    background-attachment: fixed;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(var(--bg-color), 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--nav-border);
    transition: var(--transition);
}

.nav-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: -0.02em;
    transition: var(--transition);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-tabs {
    display: flex;
    gap: 0.5rem;
    background-color: var(--surface-color);
    padding: 0.25rem;
    border-radius: 9999px;
    border: 1px solid var(--border-color);
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn:hover {
    color: var(--text-color);
}

.tab-btn.active {
    background-color: var(--primary-color);
    color: var(--bg-color);
}

/* Theme Toggle */
.theme-toggle {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.theme-toggle:hover {
    color: var(--text-color);
    background-color: var(--surface-color);
}

.hidden {
    display: none !important;
}

/* Content */
.content-wrapper {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 2rem 1.5rem;
}

.legal-section {
    display: none;
    animation: fadeIn 0.4s ease forwards;
}

.legal-section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Typography */
h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
    color: var(--text-color);
}

p {
    margin-bottom: 1.25rem;
    color: var(--text-muted);
}

strong {
    color: var(--text-color);
    font-weight: 600;
}

.last-updated {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 3rem;
    opacity: 0.8;
}

ul, ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
    color: var(--text-muted);
}

li {
    margin-bottom: 0.5rem;
}

hr {
    border: 0;
    height: 1px;
    background-color: var(--border-color);
    margin: 2.5rem 0;
}

.copyright {
    text-align: center;
    font-size: 0.875rem;
    margin-top: 4rem;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--border-color);
    padding: 2.5rem 0;
    margin-top: 0;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.footer-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-right span {
    font-weight: 500;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .content-wrapper {
        padding: 2rem 1.5rem 4rem;
    }
}