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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: #1a1a1a;
    line-height: 1.8;
    background: #fff;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Nav */
.nav {
    background: #fff;
    border-bottom: 1px solid #eee;
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 800px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: #1a1a1a;
    font-weight: 700;
    font-size: 18px;
}

.nav-logo img {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.lang-toggle {
    display: flex;
    gap: 4px;
    background: #f5f5f5;
    border-radius: 100px;
    padding: 3px;
}

.lang-btn {
    padding: 6px 16px;
    border: none;
    background: transparent;
    color: #999;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border-radius: 100px;
    transition: all 0.2s;
}

.lang-btn.active {
    background: #00BCD4;
    color: #fff;
}

/* Content */
.content {
    padding: 48px 24px 80px;
}

.content h1 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 8px;
    color: #1a1a1a;
}

.update-date {
    color: #999;
    font-size: 14px;
    margin-bottom: 40px;
}

.content section {
    margin-bottom: 32px;
}

.content h2 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: #1a1a1a;
    padding-top: 8px;
}

.content h3 {
    font-size: 17px;
    font-weight: 600;
    margin: 16px 0 8px;
    color: #333;
}

.content p {
    color: #444;
    margin-bottom: 12px;
    font-size: 15px;
}

.content ul {
    margin: 8px 0 16px 24px;
    color: #444;
}

.content li {
    margin-bottom: 6px;
    font-size: 15px;
}

.content strong {
    color: #1a1a1a;
}

/* Footer */
.footer {
    background: #1a1a1a;
    color: rgba(255,255,255,0.5);
    padding: 24px 0;
    text-align: center;
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    .content h1 {
        font-size: 28px;
    }
    .content h2 {
        font-size: 20px;
    }
}