/* Pagina di presentazione di una lezione accessibile (classi sp-*).
   Fonte unica dal 06/11/2026: prima era copiata identica in ogni pagina.
   La usano le pagine con «layout: lezione» (_layouts/lezione.html). */
.sp{--text-muted:#9aa4ae;--v-guidata:#b692ff;--v-essenziale:#3fb950;font-size:1.05rem}
.sp-skip{position:absolute;left:-9999px;top:0;z-index:2000;background:#00d9ff;color:#0a0e14;padding:.6rem 1rem;border-radius:6px;font-weight:600}
.sp-skip:focus{left:1rem;top:calc(var(--menu-h,72px) + .5rem)}
.sp :focus-visible{outline:3px solid #00d9ff;outline-offset:3px;border-radius:4px}
.sp .sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.sp-layout{max-width:1280px;margin:0 auto;padding:calc(var(--menu-h,72px) + 2rem) 2rem 3rem;display:grid;grid-template-columns:240px minmax(0,1fr);grid-template-areas:'toc hero' 'toc body';column-gap:3rem;outline:none}
.sp-hero{grid-area:hero;max-width:960px}.sp-toc{grid-area:toc}.sp-main{grid-area:body}
.sp-toc{position:sticky;top:calc(var(--menu-h,72px) + 1.5rem);align-self:start;grid-row:1 / span 2}
@media (max-width:1024px){.sp-toc{grid-row:auto}}
.sp-toc p{font-size:.8rem;font-weight:600;color:var(--text-muted);margin:0 0 .6rem .75rem;letter-spacing:.04em}
.sp-toc ol{list-style:none;margin:0;padding:0;counter-reset:t}
.sp-toc li{counter-increment:t}
.sp-toc a{display:flex;gap:.6rem;align-items:baseline;min-height:44px;padding:.55rem .75rem;border-radius:6px;color:#b8c1cc;font-size:.92rem;border-left:3px solid transparent}
.sp-toc a::before{content:counter(t,decimal-leading-zero);font-family:var(--font-mono);font-size:.75rem;color:var(--text-muted)}
.sp-toc a:hover{background:#222c3a;color:#e6edf3;opacity:1}
.sp-toc a[aria-current="true"]{color:#e6edf3;border-left-color:#00d9ff;background:#00d9ff14}
.sp-main{min-width:0;max-width:960px}
.sp section{scroll-margin-top:calc(var(--menu-h,72px) + 1.5rem);padding-top:1rem;margin-bottom:3.5rem}
.sp h1{font-size:clamp(2rem,4vw,3rem);line-height:1.1;letter-spacing:-.02em;margin:0 0 .8rem}
.sp h2{font-size:1.7rem;letter-spacing:-.02em;margin:0 0 1rem;padding-bottom:.5rem;border-bottom:1px solid #30363d}
.sp h3{font-size:1.2rem;margin:0 0 .5rem}
.sp p,.sp li{color:#c9d1d9;line-height:1.7}
.sp strong{color:#e6edf3}
.sp a{color:#00d9ff}
.sp-main a:not(.sp-btn){text-decoration:underline;text-underline-offset:3px}
.sp-kicker{font-family:var(--font-mono);font-size:.85rem;color:#00d9ff;margin:0 0 1rem}
.sp-lead{font-size:1.25rem;color:#c9d1d9;max-width:44em}
.sp-hero{padding:1.5rem 0 1rem}
.sp-stats{list-style:none;padding:0;margin:2rem 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem}
.sp-stats li{background:#151b23;border:1px solid #30363d;border-radius:8px;padding:1.1rem 1.2rem;color:#c9d1d9;font-size:.95rem}
.sp-stats b{display:block;font-family:var(--font-mono);font-size:2rem;color:#00d9ff;line-height:1.1;margin-bottom:.3rem;font-weight:600}
.sp-actions{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:1rem}
.sp-btn{display:inline-flex;align-items:center;min-height:48px;padding:.7rem 1.3rem;border-radius:6px;background:#00d9ff;color:#0a0e14!important;font-weight:600;text-decoration:none}
.sp-btn:hover{background:#6be8ff;opacity:1}
.sp-btn-ghost{background:transparent;color:#e6edf3!important;border:1px solid #8b949e}
.sp-btn-ghost:hover{background:#222c3a;border-color:#00d9ff}
.sp-key{background:linear-gradient(135deg,#00d9ff12 0%,#3fb9500d 100%);border:1px solid #00d9ff55;border-radius:8px;padding:1.2rem 1.4rem;margin:1rem 0 1.5rem}
.sp-key .lbl{font-family:var(--font-mono);font-size:.8rem;color:#00d9ff;margin:0 0 .4rem}
.sp-key p:last-child{margin-bottom:0}
.sp-vgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.2rem;align-items:start}
.sp-vcard{background:#1a222d;border:1px solid #30363d;border-top:4px solid var(--vc);border-radius:8px;padding:1.3rem 1.3rem 1.2rem}
.sp-v-guidata{--vc:var(--v-guidata)}.sp-v-essenziale{--vc:var(--v-essenziale)}
.sp-vtag{display:inline-block;font-family:var(--font-mono);font-size:.75rem;color:var(--vc);border:1px solid var(--vc);border-radius:4px;padding:.1rem .5rem;margin:0 0 .8rem}
.sp-vcard ul{padding-left:1.2rem;margin:.6rem 0}
.sp-who{font-size:.95rem}
.sp-steps{list-style:none;counter-reset:s;padding:0;margin:1rem 0}
.sp-steps li{counter-increment:s;position:relative;padding:.9rem 1rem .9rem 3.6rem;background:#151b23;border:1px solid #30363d;border-radius:8px;margin-bottom:.7rem}
.sp-steps li::before{content:counter(s);position:absolute;left:1rem;top:.85rem;width:1.8rem;height:1.8rem;border:2px solid #00d9ff;border-radius:6px;display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-size:.85rem;color:#00d9ff}
.sp-say{font-family:var(--font-mono);font-size:.92rem;color:#e6edf3;background:#0f1419;border:1px solid #30363d;border-radius:4px;padding:.05rem .4rem}
.sp-scroll{overflow-x:auto;max-width:100%;position:relative;margin:1rem 0 1.5rem;border:1px solid #30363d;border-radius:8px}
.sp table{width:100%;border-collapse:collapse;font-size:.93rem}
.sp caption{text-align:left;font-weight:600;color:#e6edf3;padding:.8rem 1rem;caption-side:top}
.sp th,.sp td{border-top:1px solid #30363d;padding:.7rem .9rem;text-align:left;vertical-align:top;color:#c9d1d9}
.sp thead th{background:#151b23;color:#e6edf3;font-weight:600}
.sp tbody th{color:#e6edf3;font-weight:500}
.sp-wide{min-width:760px}
.sp-mid{min-width:560px}
.sp-warn{background:#d299220f;border:1px solid #d2992266;border-left:4px solid #d29922;border-radius:8px;padding:1rem 1.3rem}
.sp-warn ul{margin:0;padding-left:1.2rem}
.sp-end{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.2rem}
.sp-endcard{background:#1a222d;border:1px solid #30363d;border-radius:8px;padding:1.4rem}
.sp-foot{color:var(--text-muted);font-size:.9rem;border-top:1px solid #30363d;padding-top:1rem;margin-top:2rem}
.sp-foot li{color:#b8c1cc}
@media (max-width:1024px){.sp-layout{grid-template-columns:1fr;grid-template-areas:'hero' 'toc' 'body';gap:1rem}
.sp-toc{position:static;border:1px solid #30363d;border-radius:8px;padding:.8rem}
.sp-toc ol{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr))}}
@media (max-width:768px){.sp-layout{padding-left:1rem;padding-right:1rem}.sp-toc a{font-size:.88rem}}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
/* integrazione sito: su mobile base-styles.css mette l'header in colonna e l'hamburger esce dalla barra fissa */
@media (max-width:768px){.header-content{flex-direction:row;gap:1rem}}