:root {
    --page-bg: #e7e7f7;
    --side-bg: #d6d6ee;
    --panel-bg: #f8f8ff;
    --border: #9292b6;
    --text: #20202b;
    --muted: #626273;
    --link: #153a9b;
    --link-hover: #001c70;
    --accent: #5d2ab8;
    --accent-dark: #452083;
    --content-width: 900px;
    --sidebar-width: 205px;
}

* { box-sizing: border-box; }
html { background: var(--page-bg); }
body {
    margin: 0;
    color: var(--text);
    background: var(--page-bg);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 17px;
    line-height: 1.55;
}

a { color: var(--link); }
a:hover { color: var(--link-hover); }
img { max-width: 100%; }

.site-shell {
    width: min(calc(var(--sidebar-width) + var(--content-width) + 48px), 100%);
    margin: 0 auto;
    display: grid;
    grid-template-columns: var(--sidebar-width) minmax(0, var(--content-width));
    gap: 28px;
    padding: 0 18px;
    align-items: start;
}

.sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    padding: 22px 14px 28px;
    background: var(--side-bg);
    border-left: 1px solid var(--border);
    border-right: 1px solid var(--border);
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    text-decoration: none;
}
.brand img { flex: 0 0 auto; }
.brand-title {
    font-size: 1.18rem;
    line-height: 1.05;
    font-weight: 700;
}
.version-tag {
    margin: 12px 0 18px;
    padding: 5px 8px;
    border: 1px solid var(--border);
    background: var(--panel-bg);
    font-size: .88rem;
    text-align: center;
}

.nav-list, .mobile-nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.nav-list li { margin: 2px 0; }
.nav-list a {
    display: block;
    padding: 7px 9px;
    color: var(--text);
    text-decoration: none;
    border-left: 4px solid transparent;
}
.nav-list a:hover {
    background: rgba(255,255,255,.55);
    color: var(--text);
}
.nav-list a.active {
    background: var(--panel-bg);
    border-left-color: var(--accent);
    font-weight: 700;
}
.nav-divider { margin-top: 14px !important; padding-top: 10px; border-top: 1px solid var(--border); }

.content {
    min-width: 0;
    padding: 28px 0 40px;
}
.content section {
    margin: 0 0 34px;
}
.page-head {
    border-bottom: 2px solid var(--border);
    padding-bottom: 15px;
    margin-bottom: 25px !important;
}
.page-head h1 {
    margin: 0 0 6px;
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.05;
}
.eyebrow {
    margin: 0 0 5px;
    color: var(--accent-dark);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .08em;
    font-size: .84rem;
}
.lead {
    margin: 8px 0 0;
    font-size: 1.18rem;
    max-width: 760px;
}

h2 { margin: 0 0 10px; font-size: 1.48rem; }
h3 { margin-bottom: 6px; }
p { margin: 0 0 14px; }
ul, ol { margin-top: 7px; }
li { margin: 4px 0; }
code { background: var(--panel-bg); padding: 1px 4px; border: 1px solid #d6d6e6; }

.note, .version-box, .download-box {
    background: var(--panel-bg);
    border: 1px solid var(--border);
    padding: 14px 16px;
}
.version-box h2, .download-box h2 { margin-top: 0; }
.small { font-size: .92rem; color: var(--muted); }

.button {
    display: inline-block;
    padding: 9px 13px;
    margin: 3px 6px 3px 0;
    border: 1px solid var(--accent-dark);
    background: var(--panel-bg);
    color: var(--accent-dark);
    font-weight: 700;
    text-decoration: none;
}
.button:hover { background: #ece5fb; color: var(--accent-dark); }
.button.primary { background: var(--accent); color: #fff; }
.button.primary:hover { background: var(--accent-dark); color: #fff; }
.button.big { padding: 12px 17px; }

.feature-links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}
.feature-links a {
    display: block;
    padding: 11px 13px;
    border: 1px solid var(--border);
    background: var(--panel-bg);
    color: var(--text);
    text-decoration: none;
}
.feature-links a:hover { border-color: var(--accent); }
.feature-links strong { display: block; color: var(--link); margin-bottom: 2px; }
.feature-links span { font-size: .93rem; color: var(--muted); }

.screenshot {
    margin: 22px 0 30px;
    max-width: 820px;
}
.screenshot img {
    display: block;
    width: 100%;
    min-height: 180px;
    object-fit: contain;
    background: #d4d4df;
    border: 1px solid var(--border);
}
.screenshot figcaption {
    font-size: .9rem;
    color: var(--muted);
    padding-top: 5px;
}

.site-footer {
    margin-top: 54px;
    padding: 22px 0 10px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: var(--muted);
    font-size: .9rem;
}
.site-footer p { margin: 0; }

.mobile-header { display: none; }

@media (max-width: 760px) {
    body { font-size: 16px; }
    .site-shell { display: block; width: 100%; padding: 0 14px; }
    .sidebar { display: none; }
    .content { padding-top: 22px; }
    .mobile-header {
        display: block;
        position: sticky;
        top: 0;
        z-index: 20;
        background: var(--side-bg);
        border-bottom: 1px solid var(--border);
        padding: 7px 12px;
    }
    .mobile-brand {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        color: var(--text);
        text-decoration: none;
        font-weight: 700;
    }
    .mobile-menu { margin-top: 5px; }
    .mobile-menu summary {
        cursor: pointer;
        font-weight: 700;
        color: var(--link);
        padding: 5px 0;
    }
    .mobile-nav-list {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 3px 10px;
        padding: 7px 0 10px;
    }
    .mobile-nav-list a {
        display: block;
        padding: 5px 4px;
        text-decoration: none;
    }
    .mobile-nav-list a.active { font-weight: 700; text-decoration: underline; }
    .mobile-nav-list .nav-divider { grid-column: 1 / -1; border-top: 1px solid var(--border); padding-top: 4px; margin-top: 5px !important; }
    .feature-links { grid-template-columns: 1fr; }
    .page-head h1 { font-size: 2.1rem; }
    .lead { font-size: 1.08rem; }
    .screenshot img { min-height: 110px; }
}

@media (max-width: 430px) {
    .mobile-nav-list { grid-template-columns: 1fr; }
}

@media print {
    .sidebar, .mobile-header, .site-footer { display: none !important; }
    .site-shell { display: block; width: auto; padding: 0; }
    .content { padding: 0; }
    body { background: white; color: black; }
    a { color: black; text-decoration: underline; }
}