:root {
        --primary-color: #E91E63;
        --secondary-color: #FCE4EC;
        --text-color: #880E4F;
        --font-main: 'Montserrat', sans-serif;
        --bg-color: #f8f9fa;
        --sidebar-width: 280px;
        --header-height: 60px;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    body { font-family: var(--font-main); color: var(--text-color); background-color: var(--bg-color); line-height: 1.6; }
    a { text-decoration: none; color: inherit; }
    ul { list-style: none; }

    .container { display: flex; min-height: 100vh; }
    
    .sidebar {
        width: var(--sidebar-width);
        background: white;
        height: 100vh;
        position: fixed;
        left: 0; top: 0;
        border-right: 1px solid #eee;
        padding: 2rem;
        display: flex; flex-direction: column; justify-content: space-between;
        z-index: 100;
    }
    .sidebar nav ul { display: flex; flex-direction: column; gap: 15px; }
    .sidebar nav a { display: block; padding: 10px 15px; border-radius: 8px; transition: background 0.2s, color 0.2s; font-weight: 500; }
    .sidebar nav a:hover { background: var(--secondary-color); color: var(--primary-color); }
    .sidebar-footer { font-size: 0.8rem; color: #888; border-top: 1px solid #eee; padding-top: 1rem; }

    main { margin-left: var(--sidebar-width); flex: 1; padding: 2rem 4rem; max-width: 1200px; }
    header { display: none; }

    @media (max-width: 768px) {
        .container { flex-direction: column; }
        .sidebar { position: static; width: 100%; height: auto; border-right: none; border-bottom: 1px solid #eee; padding: 1rem; }
        main { margin-left: 0; padding: 1rem; }
        header { display: flex; align-items: center; justify-content: space-between; padding: 1rem; background: white; border-bottom: 1px solid #eee; }
        .logo { font-weight: bold; font-size: 1.2rem; color: var(--primary-color); }
    }

    .button { display: inline-block; padding: 12px 24px; background: var(--primary-color); color: white; border-radius: 50px; transition: transform 0.2s, box-shadow 0.2s; font-weight: bold; }
    .button:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.15); }

    .hero { background: white; padding: 4rem; border-radius: 16px; box-shadow: 0 4px 20px rgba(0,0,0,0.05); margin-bottom: 2rem; text-align: center; background-image: radial-gradient(circle at top right, var(--secondary-color) 0%, transparent 40%); }
    .hero h1 { font-size: 3.5rem; margin-bottom: 1rem; color: var(--primary-color); line-height: 1.2; }
    .subtitle { font-size: 1.2rem; color: #666; margin-bottom: 2rem; max-width: 600px; margin-left: auto; margin-right: auto; }

    .feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
    .feature-card { background: white; padding: 2rem; border-radius: 12px; border: 1px solid #eee; transition: transform 0.3s; }
    .feature-card:hover { transform: translateY(-5px); border-color: var(--primary-color); }
    .feature-card h3 { color: var(--primary-color); margin-bottom: 0.5rem; }

    .doc-layout { background: white; padding: 3rem; border-radius: 12px; box-shadow: 0 2px 10px rgba(0,0,0,0.05); }
    .doc-layout h1 { font-size: 2.5rem; margin-bottom: 2rem; border-bottom: 2px solid var(--secondary-color); padding-bottom: 1rem; }
    .doc-layout h2 { margin-top: 2rem; margin-bottom: 1rem; color: var(--text-color); }
    .doc-layout p, .doc-layout ul { margin-bottom: 1rem; color: #555; }
    .doc-layout ul { padding-left: 1.5rem; list-style: disc; }

    .support-card { background: var(--secondary-color); padding: 2rem; border-radius: 12px; text-align: center; margin-bottom: 3rem; }
    .faq-section details { background: white; border: 1px solid #eee; padding: 1rem; margin-bottom: 1rem; border-radius: 8px; }
    .faq-section summary { font-weight: 600; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; }
    .faq-section summary::after { content: '+'; font-size: 1.2rem; color: var(--primary-color); }
    .faq-section details[open] summary::after { content: '-'; }
    .faq-section p { margin-top: 1rem; color: #666; }