:root{
        --primary:#667eea;
        --primary-2:#764ba2;
        --bg:#f8f9fa;
        --muted:#7f8c8d;
        --text:#2c3e50;
        --white: #ffffff;
        --container-max:900px;
    }

    /* Layout container constrained to 900px */
    .container{
        max-width: var(--container-max);
        margin: 0 auto;
        padding: 0 16px;
        box-sizing: border-box;
    }

    .version-badge {
        display: inline-block;
        background: rgba(255,255,255,0.2);
        padding: 5px 15px;
        border-radius: 20px;
        font-size: 0.9rem;
        margin-top: 15px;
    }

    /* Features Section */
    .features {
        padding: 64px 0;
        background: var(--white);
    }

    .section-title {
        text-align: center;
        font-size: 2rem;
        margin-bottom: 14px;
        color: var(--text);
    }

    .section-subtitle {
        text-align: center;
        font-size: 1rem;
        color: var(--muted);
        margin-bottom: 40px;
    }

    .features-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
        gap: 22px;
        margin-top: 36px;
    }

    .feature-card {
        background: var(--bg);
        padding: 28px 22px;
        border-radius: 10px;
        text-align: center;
        transition: transform .25s ease, box-shadow .25s ease;
    }

    .feature-card:hover {
        transform: translateY(-6px);
        box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    }

    .feature-icon {
        font-size: 2.4rem;
        margin-bottom: 14px;
        line-height:1;
    }

    .feature-card h3 {
        font-size: 1.25rem;
        margin-bottom: 10px;
        color: var(--text);
    }

    .feature-card p {
        color: var(--muted);
        line-height: 1.7;
        font-size: 0.95rem;
        margin: 0;
    }

    /* Screenshots Section */
    .screenshots {
        padding: 56px 0;
        background: var(--bg);
    }

    .screenshot-placeholder {
        background: var(--white);
        border: 2px dashed #e6e6e6;
        border-radius: 10px;
        padding: 60px;
        text-align: center;
        color: #9aa1a6;
        margin: 20px 0;
    }

    .screenshot-placeholder h3 {
        font-size: 1.25rem;
        margin-bottom: 8px;
    }

    /* Tech Stack Section */
    .tech-stack {
        padding: 56px 0;
        background: var(--white);
    }

    .tech-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 16px;
        margin-top: 28px;
    }

    .tech-item {
        background: var(--bg);
        padding: 18px;
        border-radius: 8px;
        border-left: 4px solid var(--primary);
    }

    .tech-item h4 {
        color: var(--text);
        margin-bottom: 8px;
        font-size: 1rem;
    }

    .tech-item p {
        color: var(--muted);
        font-size: 0.92rem;
        margin:0;
        line-height:1.5;
    }

    /* Installation Section */
    .installation {
        padding: 56px 0;
        background: var(--text);
        color: var(--white);
    }

    .installation .section-title { color: var(--white); font-size:1.8rem; }
    .installation .section-subtitle { color: rgba(255,255,255,0.85); font-size:1rem; }

    .install-steps {
        max-width: 780px;
        margin: 28px auto;
    }

    .install-step {
        background: rgba(255,255,255,0.06);
        padding: 20px;
        border-radius: 10px;
        margin-bottom: 14px;
        border-left: 4px solid var(--primary);
    }

    .install-step h3 {
        margin-bottom: 12px;
        display: flex;
        align-items: center;
        font-size: 1.05rem;
    }

    .step-number {
        background: var(--primary);
        width: 28px;
        height: 28px;
        border-radius: 50%;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        margin-right: 12px;
        font-weight: 700;
        color: var(--white);
        font-size: 0.95rem;
    }

    .code-block {
        background: rgba(0,0,0,0.25);
        padding: 12px;
        border-radius: 6px;
        font-family: 'Consolas','Monaco',monospace;
        margin: 12px 0;
        overflow-x: auto;
        font-size: 0.95rem;
        color: #fff;
    }

    /* Requirements */
    .requirements {
        padding: 44px 0;
        background: var(--bg);
    }

    .req-list { max-width: 680px; margin: 16px auto; }

    .req-item {
        background: var(--white);
        padding: 14px;
        margin-bottom: 12px;
        border-radius: 8px;
        display: flex;
        align-items: center;
        box-shadow: 0 2px 8px rgba(0,0,0,0.03);
    }

    .req-icon { font-size: 1.6rem; margin-right: 14px; line-height:1; }

    /* FAQ Section */
    .faq {
        padding: 56px 0;
        background: var(--white);
    }

    .faq-list { max-width: 760px; margin: 20px auto; }

    .faq-item {
        background: var(--bg);
        padding: 18px;
        margin-bottom: 12px;
        border-radius: 10px;
        border-left: 4px solid var(--primary);
    }

    .faq-item h4 {
        color: var(--text);
        margin-bottom: 8px;
        font-size: 1.05rem;
    }

    .faq-item p { color: var(--muted); line-height:1.7; margin:0; }

    /* Performance Stats */
    .stats {
        padding: 44px 0;
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-2) 100%);
        color: var(--white);
    }

    .stats-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
        gap: 18px;
        margin-top: 18px;
    }

    .stat-card { text-align: center; padding: 12px 6px; }

    .stat-number {
        font-size: 2rem;
        font-weight: 700;
        margin-bottom: 8px;
    }

    .stat-label { font-size: 0.98rem; opacity: 0.95; }

    /* Download Section */
    .download {
        padding: 56px 0;
        background: var(--bg);
        text-align: center;
    }

    .download-btn {
        display: inline-block;
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-2) 100%);
        color: var(--white);
        padding: 14px 42px;
        border-radius: 40px;
        text-decoration: none;
        font-size: 1.05rem;
        font-weight: 600;
        transition: transform .2s ease, box-shadow .2s ease;
        margin-top: 18px;
    }

    .download-btn:hover {
        transform: translateY(-3px);
        box-shadow: 0 10px 30px rgba(102,126,234,0.3);
    }

    .download-info { margin-top: 14px; color: var(--muted); font-size:0.95rem; }

    /* Responsive tweaks */
    @media (max-width: 900px) {
        :root { --container-max: calc(100% - 32px); }
        .features { padding: 48px 0; }
        .screenshots { padding: 36px 0; }
    }

    @media (max-width: 600px) {
        .section-title { font-size: 1.5rem; }
        .section-subtitle { font-size: .95rem; margin-bottom: 20px; }
        .feature-card { padding: 18px; }
        .screenshot-placeholder { padding: 36px; }
        .install-steps { margin: 18px auto; }
        .code-block { font-size: 0.9rem; }
        .download-btn { padding: 12px 28px; font-size: 1rem; }
    }