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

@font-face {
    font-family: 'IBM Plex Mono';
    src: url('res/fonts/IBMPlexMono-Regular.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'IBM Plex Mono';
    src: url('res/fonts/IBMPlexMono-SemiBold.woff2') format('woff2');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}

:root {
    --bg:          #f5f5f7;
    --text:        #1d1d1f; /* Da usare per TESTI NORMALI */
    --text-light:  #969696; /* Da usare per TESTI SECONDARI o DESCRITTIVI */
    --code:        #1e50ff; /* Da usare per SNIPPET DI CODICE, COMANDI, OUTPUT */
    --rule:        #cccccc;
    --sheet-w:     1240px;
    --px:          24px;
    --fs-title:    16px;
    --fs:          14px;
    --fs-note:     12px;
    --lh:          1.5;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg:         #000;
        --text:       #f5f5f7;
        --text-light: #949494;
        --code:       #abbdff;
        --rule:       #333333;
    }
}

/* ─── BASE ────────────────────────────────────────── */
html,
body {
    width: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: 'IBM Plex Mono', monospace;
    font-size: var(--fs);
    line-height: var(--lh);
}

/* ─── SHEET ────────────────────────────────────────── */
.sheet {
    max-width: var(--sheet-w);
    margin: 0 auto;
    padding: var(--px);
}

/* ─── RULE ─────────────────────────────────────────── */
.rule {
    border: none;
    border-top: 1px solid var(--rule);
}

/* ─── HEADER ───────────────────────────────────────── */
.row--header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 0 0 16px;
}

.label {
    font-weight: 400;
    color: var(--text);
}

.tagline {
    color: var(--text);
    font-size: var(--fs);
}

/* ─── BLOCKS ───────────────────────────────────────── */
.block {
    padding: 8px 0 24px 0;
}

.section-label {
    color: var(--text);
    font-size: var(--fs-title);
    margin-bottom: 16px;
    font-weight: 600;
}

/* ─── INSTALL ──────────────────────────────────────── */
.install-row {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.copy-btn {
    background: none;
    border: 1.5px solid var(--rule);
    color: var(--text);
    font-family: inherit;
    font-size: var(--fs);
    padding: 3px 5px;
    cursor: pointer;
}

/* ─── DATA TABLE ───────────────────────────────────── */
.data-table {
    margin-top: 16px;
    border-collapse: collapse;
    width: 100%;
    table-layout: fixed;
}

.data-table th {
    font-weight: 400;
    color: var(--text);
    text-align: left;
    padding: 0 0 8px 0;
    border-bottom: 1px solid var(--rule);
}

.data-table td {
    vertical-align: top;
    color: var(--text);
    padding: 8px 0;
    overflow-wrap: anywhere;
}

.data-table tbody tr+tr td {
    border-top: 1px solid var(--rule);
}

.data-table td:last-child {
    color: var(--text);
}

/* ─── QUICK START ──────────────────────────────────── */
.qs-steps {
    display: flex;
    flex-direction: column;
    gap: 32px;
    margin-top: 6px;
}

.qs-step {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.qs-n {
    color: var(--code);
    flex-shrink: 0;
}

.qs-body {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
}

.qs-block {
    font-family: inherit;
    color: var(--code);
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    border-left: 2px solid var(--rule);
    padding-left: 14px;
    margin-top: 14px;
}

/* ─── CODE BLOCK (line-numbered, wrapping) ─────── */
.code-block {
    border-left: 2px solid var(--rule);
    margin-top: 14px;
    overflow: hidden;
    font-family: inherit;
    font-size: inherit;
}

.code-line {
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.line-num {
    flex-shrink: 0;
    width: var(--num-width, 1ch);
    padding: 0;
    margin-left: 8px;
    text-align: left;
    color: var(--text-light);
    user-select: none;
    line-height: var(--lh);
}

.line-code {
    flex: 1;
    min-width: 0;
    color: var(--code);
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    line-height: var(--lh);
}

/* ─── NOTE ─────────────────────────────────────────── */
.note {
    color: var(--text-light);
    font-size: var(--fs-note);
    margin-top: 8px;
}

.note code {
    font-family: inherit;
    color: var(--code);
}

/* ─── FEATURES ─────────────────────────────────────── */
.feat-groups {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px 48px;
    margin-top: 6px;
}

.feat-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.feat-group-label {
    color: var(--code);
    text-transform: uppercase;
}

.feat-group>div {
    color: var(--text);
}

.feat-group code {
    font-family: inherit;
    color: var(--code);
}

/* ─── ARCHITECTURE ─────────────────────────────────── */
.arch-desc {
    margin-top: 14px;
}

.arch-desc+.arch-desc {
    margin-top: 16px;
}

/* ─── LINKS ────────────────────────────────────────── */
.links {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 45%;
}

.links a {
    display: flex;
    align-items: baseline;
    color: var(--text);
    text-underline-offset: 2px;
}

.link-sub {
    color: var(--text);
    font-size: var(--fs);
}

/* ─── DOCS ─────────────────────────────────────────── */
.toc {
    display: flex;
    flex-direction: column;
}

.toc>a {
    margin-top: 8px;
    color: var(--text);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.toc-indent {
    display: flex;
    flex-direction: column;
    padding-left: 16px;
}

.toc-indent a {
    color: var(--text);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.doc-h3 {
    color: var(--text);
    margin-top: 24px;
    margin-bottom: 8px;
    font-weight: 600;
}

.doc-p code {
    font-family: inherit;
    color: var(--code);
}

.doc-p--top {
    margin-top: 16px;
}

.doc-link {
    color: var(--text);
    text-underline-offset: 3px;
}

.param-table td.muted-cell {
    color: var(--text);
}

.param-table code {
    font-family: inherit;
    color: var(--code);
}

/* ─── FOOTER ───────────────────────────────────────── */
.row--footer {
    display: flex;
    justify-content: space-between;
    padding-top: 16px;
    font-size: var(--fs);
}

/* ─── WATERMARK ─────────────────────────────────────── */
.watermark {
    max-width: var(--sheet-w);
    margin: 0 auto;
    padding: 0 var(--px) 0;
}

/* ─── MOBILE ───────────────────────────────────────── */
@media (max-width: 640px) {
    :root {
        --fs-title: 18px;
        --fs: 16px;
        --fs-note: 14px;
        --lh: 1.5;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 2px;
    }

    .feat-groups {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .qs-block {
        font-size: var(--fs)
    }

    .data-table {
        display: block;
        width: 100%;
    }

    .data-table thead {
        display: none;
    }

    .data-table tbody {
        display: block;
    }

    .data-table tbody tr {
        display: block;
        border-top: 1px solid var(--rule);
        padding: 10px 0;
    }

    .data-table tbody tr:first-child {
        border-top: none;
        padding-top: 0;
    }

    .data-table tbody tr+tr td {
        border-top: none;
    }

    .data-table td {
        display: block;
        position: relative;
        padding: 2px 0 2px calc(var(--label-w, 8ch) + 10px);
        overflow-wrap: anywhere;
    }

    .data-table td::before {
        content: attr(data-label);
        position: absolute;
        left: 0;
        top: 2px;
        width: var(--label-w, 8ch);
    }

    .diagram {
        font-size: var(--fs);
    }
}