:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --sidebar-width: 300px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    background: var(--bg-gradient);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    overflow-x: hidden;
}

/* Sidebar Styling */
aside {
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--glass-border);
    position: fixed;
    left: 0;
    top: 0;
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: var(--transition);
}

.sidebar-header {
    padding: 2rem;
    border-bottom: 1px solid var(--glass-border);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(to right, #818cf8, #c084fc);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.nav-group {
    margin-bottom: 2rem;
}

.nav-group-title {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    padding-left: 1rem;
}

.nav-link {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 0.75rem;
    margin-bottom: 0.25rem;
    font-size: 0.95rem;
    transition: var(--transition);
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
}

.nav-link.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.btn-install-pwa {
    background: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    color: white !important;
    font-weight: 600;
    margin-top: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
}

.btn-install-pwa:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
    filter: brightness(1.1);
}

/* Main Content Area */
main {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 3rem;
    max-width: 1200px;
}

#content {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 1.5rem;
    padding: 3rem;
    animation: fadeIn 0.5s ease-out;
    line-height: 1.6;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Markdown Specific Styling */
#content h1 {
    margin-bottom: 1.5rem;
    font-size: 2.5rem;
}

#content h2 {
    margin: 2rem 0 1rem;
    color: #818cf8;
}

#content p {
    margin-bottom: 1rem;
}

#content code {
    background: rgba(0, 0, 0, 0.3);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9em;
}

#content pre {
    background: #0f172a;
    padding: 1.5rem;
    border-radius: 1rem;
    overflow-x: auto;
    margin: 1.5rem 0;
    border: 1px solid var(--glass-border);
}

/* Responsive Design */
@media (max-width: 1024px) {
    aside {
        transform: translateX(-100%);
    }

    body.sidebar-open aside {
        transform: translateX(0);
    }

    main {
        margin-left: 0;
        padding: 1.5rem;
    }

    .mobile-nav {
        display: block;
    }
}