:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --bg-body: #f8fafc;
    --bg-sidebar: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
    font-family: var(--font-sans);
    color: var(--text-main);
    background-color: var(--bg-body);
    line-height: 1.6;
}

.container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
aside {
    width: 280px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    padding: 2rem 1.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 2.5rem;
    text-decoration: none;
    color: var(--text-main);
}

.logo img {
    height: 32px;
}

.logo span {
    font-weight: 800;
    font-size: 1.2rem;
    letter-spacing: -0.02em;
}

nav ul {
    list-style: none;
}

nav h3 {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    margin: 1.5rem 0 0.75rem 0;
}

nav a {
    display: block;
    padding: 0.5rem 0;
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s;
}

nav a:hover {
    color: var(--primary);
}

/* Main Content */
main {
    flex: 1;
    margin-left: 280px;
    padding: 4rem 6rem;
    max-width: 1200px;
}

section {
    margin-bottom: 5rem;
    scroll-margin-top: 4rem;
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.03em;
}

h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

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

.screenshot {
    margin: 2rem 0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0,0,0,0.1);
    border: 1px solid var(--border);
}

.screenshot img {
    width: 100%;
    display: block;
}

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 99px;
    font-size: 0.75rem;
    font-weight: 600;
    background: #dcfce7;
    color: #166534;
}

.alert {
    padding: 1rem;
    border-radius: 8px;
    margin: 1.5rem 0;
    background: #eff6ff;
    border-left: 4px solid var(--primary);
}

.alert-title {
    font-weight: 700;
    margin-bottom: 0.25rem;
}

/* Responsive */
@media (max-width: 1024px) {
    main {
        padding: 3rem;
    }
}

@media (max-width: 768px) {
    aside {
        display: none;
    }
    main {
        margin-left: 0;
        padding: 2rem;
    }
}