:root {
    --bg: #0f172a;
    /* slate-900 */
    --panel: #111827;
    /* neutral-900 */
    --card: #0b1220;
    /* deep slate */
    --muted: #94a3b8;
    /* slate-400 */
    --text: #e5e7eb;
    /* zinc-200 */
    --primary: #22d3ee;
    /* cyan-400 */
    --primary-strong: #06b6d4;
    /* cyan-500 */
    --accent: #a78bfa;
    /* violet-400 */
    --ring: rgba(34, 211, 238, .35);
    --radius: 16px;
    --shadow: 0 10px 30px rgba(2, 6, 23, .45);
    --maxw: 1400px;
}

@media (prefers-color-scheme: light) {
    :root {
        --bg: #f8fafc;
        /* slate-50 */
        --panel: #ffffff;
        /* white */
        --card: #ffffff;
        /* white */
        --muted: #475569;
        /* slate-600 */
        --text: #0f172a;
        /* slate-900 */
        --primary: #06b6d4;
        /* cyan-500 */
        --primary-strong: #0891b2;
        /* cyan-600 */
        --accent: #7c3aed;
        /* violet-600 */
        --ring: rgba(6, 182, 212, .25);
        --shadow: 0 16px 30px rgba(2, 6, 23, .06);
    }
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Inter, "Helvetica Neue", Arial, Noto Sans, "Apple Color Emoji", "Segoe UI Emoji";
    background: radial-gradient(1200px 600px at 10% -10%, rgba(124, 58, 237, .08), transparent 60%),
        radial-gradient(1000px 500px at 110% -10%, rgba(34, 211, 238, .08), transparent 60%), var(--bg);
    color: var(--text);
}

.wrap {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 24px;
}

header.site {
    position: sticky;
    top: 0;
    z-index: 6;
    backdrop-filter: blur(8px);
    background: linear-gradient(to right, rgba(0, 0, 0, .35), rgba(0, 0, 0, .15));
    border-bottom: 1px solid rgba(148, 163, 184, .15);
}

header .bar {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    max-width: var(--maxw);
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    letter-spacing: .2px;
}

.logo .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    box-shadow: 0 0 0 4px var(--ring);
}

.actions {
    margin-left: auto;
    display: flex;
    gap: 10px;
}

.btn {
    appearance: none;
    border: 0;
    padding: 10px 14px;
    border-radius: 12px;
    cursor: pointer;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #001018;
    font-weight: 600;
    box-shadow: var(--shadow);
    transition: transform .08s ease, box-shadow .2s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: .5rem;
}

.btn.secondary {
    background: transparent;
    color: var(--text);
    border: 1px solid rgba(148, 163, 184, .25);
}

.btn:hover {
    transform: translateY(-1px);
}

.layout {
    display: flex;
    gap: 24px;
    margin-top: 24px;
}

.layout>main {
    flex: 1 1 auto;
    min-width: 0;
}

.layout>aside.toc {
    flex: 0 0 280px;
}

@media (max-width: 980px) {
    .layout {
        grid-template-columns: 1fr;
    }
}

/* Sidebar / ToC */
aside.toc {
    position: sticky;
    top: 80px;
    align-self: start;
    background: var(--panel);
    border: 1px solid rgba(148, 163, 184, .15);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
}

aside.toc h2 {
    margin: .2rem 0 8px;
    font-size: .95rem;
    color: var(--muted);
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
}

.toc a {
    display: block;
    color: var(--text);
    text-decoration: none;
    padding: 8px 10px;
    border-radius: 10px;
}

.toc a:hover {
    background: rgba(148, 163, 184, .08);
}

.toc a.active {
    outline: 2px solid var(--ring);
    background: rgba(34, 211, 238, .08);
}

.toc .sub {
    padding-left: 12px;
    font-size: .95rem;
}

/* Cards and sections */
.card {
    background: var(--card);
    border: 1px solid rgba(148, 163, 184, .15);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.card>.hd {
    padding: 18px 20px;
    border-bottom: 1px solid rgba(148, 163, 184, .12);
    display: flex;
    align-items: center;
    gap: 10px;
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    padding: 4px 8px;
    border-radius: 999px;
    font-size: .8rem;
    background: rgba(34, 211, 238, .15);
    color: var(--primary);
    border: 1px solid rgba(34, 211, 238, .35);
}

.card>.bd {
    padding: 20px;
}

h1 {
    font-size: clamp(1.6rem, 1.2rem + 1.5vw, 2.2rem);
    margin: 8px 0 0;
}

h2 {
    font-size: 1.25rem;
    margin: 1.2rem 0 .4rem
}

h3 {
    font-size: 1.05rem;
    margin: 1rem 0 .25rem
}

p {
    margin: .5rem 0 1rem
}

.bd ul,
.db ol {
    margin: .5rem 0 1rem;
    padding-left: 1.3rem;
}

.bd ul li {
    margin: .25rem 0;
}

/* Checklist */
.checklist {
    display: grid;
    gap: 12px;
}

.checklist li {
    list-style: none;
    background: linear-gradient(180deg, rgba(148, 163, 184, .08), transparent);
    border: 1px solid rgba(148, 163, 184, .18);
    border-radius: 12px;
    padding: 10px 12px;
    display: flex;
    gap: 10px;
    align-items: flex-start;
}

.checklist li::before {
    content: "✓";
    font-weight: 800;
    color: var(--primary);
    margin-top: 1px;
}

/* Placeholders */
mark.placeholder {
    background: linear-gradient(90deg, rgba(34, 211, 238, .2), rgba(167, 139, 250, .2));
    color: inherit;
    padding: 2px 6px;
    border-radius: 8px;
    border: 1px dashed rgba(148, 163, 184, .35);
}

/* details */
details {
    border: 1px solid rgba(148, 163, 184, .18);
    border-radius: 12px;
    padding: 10px 12px;
    background: linear-gradient(180deg, rgba(148, 163, 184, .07), transparent);
}

details+details {
    margin-top: 10px;
}

summary {
    cursor: pointer;
    font-weight: 700;
    color: var(--muted);
}

/* Footer */
/* footer{opacity:.8; margin: 36px 0 20px; font-size:.9rem;} */

/* Anchors */
section {
    scroll-margin-top: 100px;
}

/* Print */
@media print {

    header.site,
    aside.toc,
    .actions {
        display: none !important;
    }

    body {
        background: #fff;
        color: #111;
    }

    .card {
        box-shadow: none;
        border: 1px solid #999
    }
}

/* --- Tables / Responsive wrappers --- */
.table-wrap {
    overflow-x: auto;
    border: 1px solid rgba(148, 163, 184, .15);
    border-radius: 12px;
    background: var(--panel);
}

table.table {
    width: 100%;
    border-collapse: collapse;
    min-width: 720px;
}

.table caption {
    caption-side: bottom;
    color: var(--muted);
    padding: 8px 4px;
    font-size: .9rem
}

.table th,
.table td {
    padding: 10px 12px;
    border-bottom: 1px solid rgba(148, 163, 184, .15);
    vertical-align: top;
}

.table thead th {
    background: linear-gradient(180deg, rgba(148, 163, 184, .12), transparent);
    text-align: left;
    font-size: .92rem;
    letter-spacing: .02em
}

.table tbody tr:hover {
    background: rgba(148, 163, 184, .06);
}

/* === Adaptivity overrides (site style.css friendly) === */
@media (max-width: 1100px) {
    .layout {
        flex-direction: column;
    }
}

.layout {
    display: flex;
    gap: clamp(16px, 2vw, 24px);
}

.wrap {
    padding: clamp(16px, 2vw, 24px);
}

.card>.bd {
    padding: clamp(16px, 2vw, 20px);
}

.card>.hd {
    padding: clamp(14px, 1.5vw, 18px) clamp(16px, 2vw, 20px);
}

html {
    font-size: 16px;
}

@media (max-width:360px) {
    html {
        font-size: 15px;
    }
}

h1 {
    font-size: clamp(1.8rem, 1.2rem + 1.2vw, 2.4rem);
}

h2 {
    font-size: clamp(1.2rem, 1rem + 0.6vw, 1.5rem);
}

.table {
    font-size: .98rem;
}

/* Stacked tables on small screens */
@media (max-width: 720px) {
    .table-wrap {
        border: 0;
        background: transparent;
    }

    table.table {
        min-width: 0;
    }

    .table thead {
        display: none;
    }

    .table tbody tr {
        display: grid;
        grid-template-columns: 1fr;
        gap: 8px;
        margin: 12px 0;
        padding: 12px;
        border: 1px solid rgba(148, 163, 184, .18);
        border-radius: 12px;
        background: var(--panel);
    }

    .table td {
        display: grid;
        grid-template-columns: 40% 60%;
        gap: 6px 10px;
        border: 0;
        padding: 0;
    }

    .table td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--muted);
    }
}

/* === Mobile navigation for ToC (drawer) === */
.mobile-only {
    display: none
}

@media (max-width: 860px) {
    .mobile-only {
        display: inline-flex
    }

    .actions .btn:not(.mobile-only) {
        display: none
    }

    aside.toc {
        position: fixed;
        top: var(--hdr);
        left: 0;
        bottom: 0;
        width: min(92vw, 420px);
        max-width: 92vw;
        transform: translateX(-105%);
        transition: transform .25s ease;
        border-radius: 0 var(--radius) var(--radius) 0;
        z-index: 5;
        overflow: auto
    }

    body.toc-open aside.toc {
        transform: translateX(0%)
    }

    .drawer-backdrop {
        display: none
    }

    body.toc-open .drawer-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(2, 6, 23, .55);
        backdrop-filter: blur(2px);
        z-index: 4
    }

    body {
        background: var(--bg);
    }

    /* sfondo semplificato su mobile per performance */
}

:root {
    --hdr: 64px
}