/* =========================================================
   NTC 2018 + Circolare 2019 — consultazione interattiva
   ========================================================= */
.ntc-hero{padding-bottom:clamp(40px,6vw,64px)}
.ntc-section{padding:0 0 clamp(56px,8vw,96px)}
.ntc-section .notice{margin-bottom:24px}

/* barra strumenti */
.ntc-bar{position:sticky;top:var(--header-h);z-index:30;display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding:12px 0 14px;background:linear-gradient(var(--paper) 82%,rgba(243,241,236,0))}
.ntc-bar .search{flex:1 1 320px}
.ntc-bar .search input{padding-right:44px}
.ntc-bar .clear{position:absolute;right:8px;top:50%;transform:translateY(-50%);width:32px;height:32px;border-radius:50%;border:0;background:transparent;color:var(--muted);cursor:pointer;display:none;font-size:20px;line-height:1}
.ntc-bar .search.has-q .clear{display:block}
.ntc-bar .clear:hover{background:var(--paper-2);color:var(--ink)}
.seg{display:inline-flex;border:1.5px solid var(--line-2);border-radius:999px;background:var(--card);padding:3px;gap:2px}
.seg button{font:inherit;font-size:14px;font-weight:550;border:0;background:transparent;color:var(--ink-2);padding:8px 14px;border-radius:999px;cursor:pointer;white-space:nowrap}
.seg button[aria-pressed="true"]{background:var(--ink);color:#fff}
.seg button:not([aria-pressed="true"]):hover{background:var(--paper-2)}
.btn-index{display:none}
.side-scrim{display:none}
.ntc-bar input[type=search]::-webkit-search-cancel-button{-webkit-appearance:none;appearance:none}

/* layout */
.ntc-app{display:grid;grid-template-columns:300px minmax(0,1fr);gap:clamp(20px,3vw,40px);align-items:start}
.ntc-side{position:sticky;top:calc(var(--header-h) + 76px);max-height:calc(100vh - var(--header-h) - 92px);display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.side-head{padding:14px 16px 10px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:8px}
.side-head b{font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.14em;text-transform:uppercase}
.side-head .close-side{display:none;border:0;background:transparent;font-size:22px;cursor:pointer;color:var(--muted)}
.side-filter{padding:10px 12px;border-bottom:1px solid var(--line)}
.side-filter input{width:100%;font:inherit;font-size:14px;padding:8px 12px;border:1.5px solid var(--line);border-radius:var(--radius-s);background:var(--paper)}
.side-filter input:focus{outline:none;border-color:var(--ink)}
.toc{overflow:auto;padding:6px 0 12px;font-size:14px;overscroll-behavior:contain}
.toc ul{list-style:none;margin:0;padding:0}
.toc .ch>button{display:grid;grid-template-columns:28px 1fr auto;gap:6px;width:100%;text-align:left;font:inherit;font-size:13.5px;font-weight:650;line-height:1.3;border:0;background:transparent;padding:9px 14px;cursor:pointer;color:var(--ink)}
.toc .ch>button:hover{background:var(--paper)}
.toc .ch>button .n{font-family:var(--mono);font-weight:500;color:var(--accent-ink)}
.toc .ch>button .chev{width:10px;height:10px;margin-top:4px;transition:transform .2s;color:var(--muted)}
.toc .ch.open>button .chev{transform:rotate(180deg)}
.toc .ch.cur>button{background:var(--accent-soft)}
.toc .ch>ul{display:none;padding:2px 0 8px}
.toc .ch.open>ul{display:block}
.toc li a{display:grid;grid-template-columns:auto 1fr auto;gap:8px;align-items:baseline;padding:4px 14px 4px calc(14px + var(--lv,0) * 12px);text-decoration:none;color:var(--ink-2);line-height:1.3;font-size:13px;border-left:3px solid transparent}
.toc li a:hover{background:var(--paper)}
.toc li a .k{font-family:var(--mono);font-size:11.5px;color:var(--muted);white-space:nowrap}
.toc li a .t{overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.toc li a.active{border-left-color:var(--accent);background:var(--paper);color:var(--ink);font-weight:600}
.toc li a .c{font-family:var(--mono);font-size:10px;line-height:1;padding:3px 4px;border-radius:4px;background:var(--paper-2);color:var(--ink-2)}
.toc li a .c.only{background:var(--ink);color:#fff}
.toc li.hide{display:none}
.toc-empty{padding:16px;color:var(--muted);font-size:14px;display:none}

/* lettore */
.ntc-main{min-width:0}
.reader{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:clamp(20px,3.2vw,44px)}
.chap-head{border-bottom:2px solid var(--ink);padding-bottom:18px;margin-bottom:10px}
.chap-head .kicker{margin-bottom:10px;display:block}
.chap-head h2{font-size:clamp(26px,3.4vw,40px);font-stretch:112%;font-weight:750}
.chap-head p{margin:12px 0 0;color:var(--muted);font-size:15px}
.loading{padding:40px 0;text-align:center;color:var(--muted);font-family:var(--mono);font-size:13px}

.par{padding:22px 0 6px;border-top:1px solid var(--line);scroll-margin-top:calc(var(--header-h) + 84px)}
.par:first-of-type{border-top:0}
.par>h3{display:flex;gap:12px;align-items:baseline;font-size:clamp(17px,1.6vw,20px);font-weight:700;letter-spacing:-.005em;line-height:1.25;margin-bottom:12px}
.par[data-lv="1"]>h3{font-size:clamp(20px,2vw,25px)}
.par[data-lv="4"]>h3,.par[data-lv="5"]>h3,.par[data-lv="6"]>h3{font-size:16.5px}
.par>h3>span:not(.k){min-width:0;flex:1 1 auto;overflow-wrap:anywhere}
.par>h3 .k{font-family:var(--mono);font-size:.78em;font-weight:500;color:var(--accent-ink);white-space:nowrap}
.par>h3 .lnk{margin-left:auto;opacity:0;text-decoration:none;color:var(--muted);font-family:var(--mono);font-size:12px;font-weight:400;transition:opacity .2s}
.par:hover>h3 .lnk,.par>h3 .lnk:focus{opacity:1}
.txt{font-size:16px;line-height:1.68;color:var(--ink-2);max-width:86ch}
.txt p{margin:0 0 .8em}
.txt h4{font-size:14px;font-family:var(--mono);font-weight:500;letter-spacing:.08em;margin:1.2em 0 .6em;color:var(--ink)}
.txt .cap{font-size:14px;font-weight:600;color:var(--ink);margin:1em 0 .5em;padding-left:10px;border-left:3px solid var(--line-2)}
.txt sub,.txt sup{font-size:.72em;line-height:0}
.txt .eq{display:flex;gap:10px;align-items:center;justify-content:space-between;font-family:var(--mono);font-size:13.5px;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius-s);padding:8px 12px;margin:0 0 .8em;overflow-x:auto}
.txt .eq span{white-space:normal}
.txt .frag{margin:0 0 .8em;border:1px dashed var(--line-2);border-radius:var(--radius-s);padding:8px 12px;font-size:13.5px;color:var(--muted)}
.txt .frag summary{cursor:pointer;list-style:none;display:flex;gap:8px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.txt .frag summary::-webkit-details-marker{display:none}
.txt .frag .fx{font-family:var(--mono);font-size:12px;margin-top:8px;color:var(--muted);word-break:break-word}
.fig{margin:.2em 0 1.1em;position:relative;max-width:100%}
.fig img{display:block;max-width:100%;height:auto;background:#fff;border:1px solid var(--line);border-radius:6px;padding:6px;box-sizing:border-box}
.circ .fig img{border-color:#e4dfd5}
.fig figcaption{display:flex;justify-content:flex-end;margin-top:4px}
.fig .orig{font-size:10.5px;padding:2px 8px;opacity:.75}
.fig:hover .orig{opacity:1}
.pgmark{display:block;font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.06em;margin:.4em 0 .8em;text-align:right}
.pgmark button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;text-decoration:underline;text-underline-offset:2px;padding:0}
.orig{font:inherit;font-family:var(--mono);font-size:11.5px;letter-spacing:.04em;display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line-2);background:var(--card);color:var(--ink-2);border-radius:999px;padding:4px 10px;cursor:pointer;white-space:nowrap}
.orig:hover{border-color:var(--ink);color:var(--ink)}
.orig svg{width:12px;height:12px}
.part-foot{display:flex;gap:8px;flex-wrap:wrap;margin:4px 0 14px}

.circ{margin:10px 0 16px;border-radius:var(--radius-s);background:#f7f5f0;border:1px solid var(--line);border-left:4px solid var(--accent)}
.circ>summary{cursor:pointer;list-style:none;display:flex;align-items:center;gap:10px;padding:10px 14px;font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-ink)}
.circ>summary::-webkit-details-marker{display:none}
.circ>summary .chev{width:10px;height:10px;transition:transform .2s;margin-left:auto;color:var(--muted)}
.circ[open]>summary .chev{transform:rotate(180deg)}
.circ>summary .ct{text-transform:none;letter-spacing:0;font-family:var(--sans);font-size:14px;font-weight:600;color:var(--ink)}
.circ .txt{padding:2px 16px 4px}
.circ .part-foot{padding:0 16px 6px}
.ocr-note{font-family:var(--mono);font-size:11px;color:var(--muted);background:var(--paper-2);border-radius:6px;padding:4px 8px;display:inline-block;margin:0 0 10px}
.only-c>h3 .k::after{content:" · solo Circolare";color:var(--muted);font-size:.9em}
mark{background:#ffe27a;color:inherit;border-radius:2px;padding:0 1px}
.par.flash{animation:flash 1.6s var(--ease)}
@keyframes flash{0%{background:var(--accent-soft)}100%{background:transparent}}

.chap-nav{display:flex;justify-content:space-between;gap:12px;margin-top:28px;flex-wrap:wrap}
.chap-nav a{flex:1 1 240px;text-decoration:none;border:1px solid var(--line);border-radius:var(--radius-s);padding:12px 16px;background:var(--paper)}
.chap-nav a:hover{border-color:var(--ink)}
.chap-nav a small{display:block;font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.chap-nav a.next{text-align:right}

/* risultati ricerca */
.results-head{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;border-bottom:2px solid var(--ink);padding-bottom:14px;margin-bottom:6px}
.results-head h2{font-size:22px;font-weight:700}
.results-head .seg button{font-size:13px;padding:6px 12px}
.res{display:block;text-decoration:none;padding:14px 4px;border-bottom:1px solid var(--line)}
.res:hover{background:var(--paper)}
.res .rh{display:flex;gap:10px;align-items:baseline;flex-wrap:wrap}
.res .tag{font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;padding:3px 6px;border-radius:4px;background:var(--ink);color:#fff}
.res .tag.c{background:var(--accent)}
.res .rk{font-family:var(--mono);font-size:13px;color:var(--accent-ink)}
.res .rt{font-weight:650;font-size:15px}
.res .sn{margin:6px 0 0;font-size:14.5px;color:var(--ink-2);line-height:1.55}
.res-more{padding:16px 0;color:var(--muted);font-size:14px}

/* visualizzatore pagina originale */
.pv{position:fixed;inset:0;z-index:300;display:none;background:rgba(11,14,18,.72);backdrop-filter:blur(3px)}
.pv.open{display:flex;align-items:stretch;justify-content:center}
.pv-box{background:var(--paper);width:min(980px,100%);margin:clamp(0px,3vh,28px) auto;display:flex;flex-direction:column;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-l)}
.pv-top{display:flex;gap:8px;align-items:center;flex-wrap:wrap;padding:10px 14px;background:var(--ink);color:#fff}
.pv-top b{font-size:14px;font-weight:600;margin-right:auto}
.pv-top b small{display:block;font-family:var(--mono);font-size:11px;font-weight:400;color:rgba(255,255,255,.65);letter-spacing:.06em}
.pv-top button,.pv-top a{font:inherit;font-size:13px;color:#fff;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:999px;padding:6px 12px;cursor:pointer;text-decoration:none;white-space:nowrap}
.pv-top button:hover,.pv-top a:hover{background:rgba(255,255,255,.2)}
.pv-top button:disabled{opacity:.4;cursor:default}
.pv-top .pgn{font-family:var(--mono);font-size:12.5px;min-width:76px;text-align:center}
.pv-body{flex:1;overflow:auto;display:flex;justify-content:center;padding:16px;background:#cfcac0}
.pv-body canvas{background:#fff;box-shadow:var(--shadow);max-width:none;height:auto}
.pv-msg{margin:auto;color:var(--ink-2);font-size:15px;text-align:center;max-width:420px;padding:24px}

@media (max-width:980px){
  .ntc-app{grid-template-columns:minmax(0,1fr)}
  .btn-index{display:inline-flex}
  .ntc-side{position:fixed;inset:0 auto 0 0;top:0;max-height:none;width:min(360px,88vw);z-index:250;border-radius:0;transform:translateX(-105%);transition:transform .25s var(--ease)}
  .ntc-side.open{transform:none}
  .side-head .close-side{display:block}
  .side-scrim{position:fixed;inset:0;background:rgba(11,14,18,.5);z-index:240;display:none}
  .side-scrim.open{display:block}
}
@media (max-width:620px){
  .ntc-bar{gap:8px;padding:8px 0 10px}
  .ntc-bar .search{order:-1;flex:1 1 100%}
  .ntc-bar .search input{padding-top:10px;padding-bottom:10px}
  .btn-index{padding:7px 12px;font-size:13px}
  .seg{flex:0 1 auto;margin-left:auto}
  .seg .lg{display:none}
  .seg button{padding:7px 10px;font-size:13px}
  .reader{padding:18px 16px;border-radius:var(--radius-s)}
  .txt{font-size:15.5px}
  .pv-box{margin:0;border-radius:0}
  .par>h3 .lnk{display:none}
}