@charset "UTF-8";
:root{--navy:#10243a;--ink:#1a2d3b;--muted:#526575;--paper:#f6f3eb;--card:#fffef9;--line:#d7dedb;--copper:#994327;--teal:#216365;--gold:#e3bc79;--serif:Georgia,'Times New Roman',serif;--sans:system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;background:var(--paper);color:var(--ink);font:1rem/1.65 var(--sans)}a{color:var(--teal);text-underline-offset:4px}button,input{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #ad550c;outline-offset:4px}button,.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:.65rem 1.15rem;border:1px solid var(--teal);border-radius:7px;background:var(--teal);color:#fff;text-decoration:none;font-weight:650;gap:.5rem}.button.secondary,button.secondary{background:transparent;color:var(--teal)}button:hover,.button:hover{filter:brightness(.94)}[hidden]{display:none!important}.skip{position:fixed;left:-9999px;z-index:20}.skip:focus{left:1rem;top:1rem;background:#fff;padding:1rem}.top{position:sticky;top:0;background:var(--navy);color:#f9eedb;z-index:5;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:1rem clamp(1rem,4vw,3rem);border-bottom:1px solid #ffffff20}.brand{display:flex;align-items:center;gap:.7rem;text-decoration:none;color:inherit;font-family:var(--serif);font-size:1.3rem;line-height:1.2;white-space:nowrap}.brand small{display:block;font:.62rem var(--sans);letter-spacing:.1em;text-transform:uppercase;color:var(--gold);margin-top:.3rem}.brand-symbol{font:2.2rem var(--serif);color:var(--gold)}.brand-symbol span{font-size:1.5rem}nav{display:flex;gap:.4rem;align-items:center}nav a{color:#f9eedb;text-decoration:none;padding:.55rem .7rem;border-radius:5px;font-size:.9rem;white-space:nowrap}nav a[aria-current=page]{background:#ffffff18;color:var(--gold)}main{min-height:70vh}main:focus{outline:none}.wrap{max-width:1180px;margin:auto;padding:3rem 2rem 4rem}.eyebrow{text-transform:uppercase;letter-spacing:.15em;font-weight:750;font-size:.72rem;color:var(--copper);margin:0 0 1rem}.hero{background:var(--navy);color:#f6efdf;padding:clamp(2rem,5vw,5rem) max(2rem,calc((100vw - 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135px);overflow:auto;padding-right:1rem;font-size:.86rem}.sidebar a{display:block;padding:.5rem .6rem;color:var(--muted);text-decoration:none;border-left:2px solid var(--line)}.sidebar a[aria-current=page]{color:var(--teal);border-color:var(--teal);background:#e6ece6;font-weight:650}.sidebar .side-title{font-size:.73rem;text-transform:uppercase;letter-spacing:.1em;font-weight:750;margin-bottom:.7rem}.breadcrumb{display:block;font-size:.9rem;margin-bottom:1.5rem}.lesson{max-width:800px;min-width:0}.lesson h1{font-size:clamp(2.3rem,4vw,3.6rem)}.lesson-body{font-size:1.075rem;line-height:1.8;max-width:72ch}.lesson-body p{margin:.9rem 0}.lesson-body li{margin-bottom:.45rem}.example{margin:1.5rem 0;background:#fffdf5;border:1px solid #e5d9bd;border-left:4px solid var(--copper);border-radius:0 7px 7px 0;padding:1rem 1.3rem}.example p{margin:.4rem 0}.remember{background:#e8efea;border-left:4px solid var(--teal);padding:1rem 1.3rem;margin:1.6rem 0;border-radius:0 7px 7px 0}.lesson-end{margin-top:2.5rem;border-top:1px solid var(--line);padding-top:1.5rem}.prev-next{display:flex;justify-content:space-between;gap:1rem;margin-top:2rem}.prev-next a{max-width:48%;font-size:.92rem}.scheme{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:clamp(1rem,3vw,2.5rem);margin:1.8rem 0 2.5rem;break-inside:avoid}.scheme h2{color:var(--copper);text-align:center}.scheme-root{max-width:740px;text-align:center;margin:auto;padding:1.1rem;border:2px solid var(--teal);border-radius:8px;background:#eaf1eb;font-weight:600}.scheme-intro{text-align:center;color:var(--muted);margin:1rem auto;max-width:65ch}.branches{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:1rem;position:relative;padding-top:1.4rem;margin-top:1.5rem;border-top:2px solid #91adae}.branches:before{content:'';position:absolute;height:1.5rem;border-left:2px solid #91adae;top:-1.5rem;left:50%}.branch{position:relative;border:1px solid #b8c9ca;border-radius:7px;padding:1.2rem;text-align:center;background:#fff}.branch:before{content:'↓';position:absolute;top:-1.65rem;left:calc(50% - .4rem);color:var(--teal);background:var(--card);line-height:1.5}.branch h3{font:750 .9rem var(--sans);color:var(--copper);margin:0 0 .7rem}.branch p{font-size:.95rem;line-height:1.6;margin:.5rem 0}.branch .sample{border-top:1px solid var(--line);padding-top:.8rem;font-family:var(--serif);font-size:1.13rem}.scheme-note{font-size:.9rem;color:var(--muted);border-top:1px dashed #bac8c7;padding-top:1rem;margin-top:1.5rem}.chain{max-width:570px;margin:1.5rem auto}.chain-node{border:1px solid var(--teal);border-left:4px solid var(--teal);border-radius:5px;padding:1rem;background:#f0f5ef}.chain-node b{display:block;font:1.3rem var(--serif)}.chain-node small{display:block;color:var(--muted);margin-top:.5rem}.scheme-footer{display:flex;justify-content:space-between;gap:1rem;margin-top:1.5rem;font-size:.88rem}.lab-sentence{font:1.5rem/1.6 var(--serif);padding:1.5rem;border-left:4px solid var(--copper);background:#fffdf5}details{background:var(--card);border:1px solid var(--line);border-radius:7px;margin:1rem 0;padding:1rem 1.3rem}summary{cursor:pointer;font-weight:650;min-height:30px}details p{margin-bottom:.3rem}.lab-card{margin-bottom:3rem}.lab-card h2{font-size:2rem}.quiz-shell{max-width:800px;margin:auto}.quiz-question{font:1.75rem/1.4 var(--serif);margin:1.6rem 0}.options{display:grid;gap:.8rem}.option{justify-content:flex-start;text-align:left;background:var(--card);color:var(--ink);border-color:#9aadae;padding:1rem}.option.correct{border:2px solid var(--teal);background:#dfeee3}.option.wrong{border:2px solid #a23626;background:#fcece5}.option:disabled{opacity:1}.feedback{padding:1.3rem;border:1px solid #a7baba;background:#e9f0e9;border-radius:8px;margin-top:1.3rem}.feedback h3{margin:0 0 .5rem;font-size:1.4rem}.feedback p{margin:.5rem 0}.report-item{padding:1rem 0;border-bottom:1px solid var(--line)}.score{font:4.5rem var(--serif);color:var(--teal);margin:.5rem 0}.empty{padding:2rem}.footer{background:var(--navy);color:#d6e1df;display:flex;justify-content:space-between;flex-wrap:wrap;gap:1rem;padding:1.5rem 3rem;font-size:.8rem}.footer a{color:var(--gold)}#update{position:fixed;z-index:10;bottom:1rem;left:50%;transform:translateX(-50%);background:#fff;padding:1rem;border:2px solid var(--teal);border-radius:8px;box-shadow:0 10px 30px #0003;width:min(95%,650px)}.print-heading{display:none}.loading{padding:3rem}.notice{padding:1rem;background:#eee5d4;border-radius:7px}.table-scroll{overflow:auto}table{width:100%;border-collapse:collapse;background:var(--card);font-size:.95rem}th,td{padding:.8rem;text-align:left;border-bottom:1px solid var(--line)}th{background:#e8efea}
@media(min-width:1000px){.branches:has(.branch:nth-child(5)){grid-template-columns:repeat(3,1fr)}}
@media(max-width:1000px){.top{align-items:flex-start;flex-direction:column;gap:.7rem}nav{width:100%;overflow:auto}.hero{gap:2rem;padding:2.8rem 2rem}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.sidebar{top:155px}.lesson-layout{grid-template-columns:190px minmax(0,1fr);gap:1.6rem}html{scroll-padding-top:150px}}
@media(max-width:700px){.top{padding:.7rem 1rem}.brand{font-size:1.1rem}.brand-symbol{font-size:1.7rem}.brand small{font-size:.58rem}nav{gap:.1rem}nav a{padding:.5rem .6rem;font-size:.8rem;min-height:40px}.hero{grid-template-columns:1fr;padding:2.2rem 1.2rem;gap:1.5rem}.hero h1{font-size:3.2rem}.hero-graph{padding:1.2rem;transform:none}.wrap{padding:2rem 1.2rem 3rem}.grid,.path-grid{grid-template-columns:1fr}.section-head{display:block}.section-head .actions{margin-top:1rem}.lesson-layout{display:block}.sidebar{display:none}.lesson-body{font-size:1.04rem}.lesson h1{font-size:2.6rem}.branches{grid-template-columns:1fr;gap:1.5rem;border-top:0;padding-top:0}.branches:before{display:none}.branch:before{top:-1.55rem}.scheme-root{margin-bottom:2rem}.scheme{padding:1.1rem}.scheme-footer{flex-direction:column}.footer{padding:1.5rem 1.2rem;flex-direction:column}.path-grid{gap:1rem}.prev-next{align-items:start}.prev-next a{font-size:.84rem}.hero-node{font-size:1.4rem}.section-head h1{font-size:2.8rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{@page{size:A4;margin:16mm}body{background:#fff;color:#111;font-size:10.5pt}.top,.footer,.sidebar,.actions,.breadcrumb,.prev-next,.lesson-end,.scheme-footer,.no-print,#update,.skip{display:none!important}.wrap{max-width:none;padding:0}.lesson-layout{display:block}.lesson,.lesson-body{max-width:none}.lesson-body{font-size:10.5pt;line-height:1.55}.lesson h1,h1{font-size:27pt}h2{font-size:21pt}h3{font-size:15pt;break-after:avoid}.example,.remember{break-inside:avoid;background:#fff;border-color:#999}.print-heading{display:block;font-size:9pt;border-bottom:1px solid #777;padding-bottom:5mm;margin-bottom:5mm}.print-lesson{break-before:page}.print-lesson:first-of-type{break-before:auto}.scheme{break-inside:avoid;box-shadow:none;margin:0 0 9mm;padding:5mm}.scheme h2{font-size:20pt}.branches{grid-template-columns:repeat(2,1fr)}.branch{padding:3mm}.branch h3{font-size:10pt}.branch p,.scheme-note,.scheme-root,.scheme-intro{font-size:9pt}.branch .sample{font-size:11pt}a{color:inherit}.hero{background:#fff;color:#111}.hero-graph{display:none}details{break-inside:avoid}details::details-content{display:block}.lab-card{break-before:page}}

/* Ramificazioni su schermi stretti: ogni voce parte dallo stesso ramo. */
@media screen and (max-width:700px){nav a{font-size:.76rem;padding:.5rem .35rem}.branches{margin-left:.5rem;padding-left:1.2rem;border-left:2px solid #91adae;gap:1rem}.branches:before{display:block;height:1.5rem;left:-2px}.branch:before{content:'→';left:-1.65rem;top:.8rem;background:var(--card)}}
@media screen and (min-width:701px){.branches:has(.branch:nth-child(5)){grid-template-columns:1fr;border-top:0;border-left:2px solid #91adae;padding:0 0 0 1.5rem;margin-left:1rem;gap:.8rem}.branches:has(.branch:nth-child(5)):before{left:-2px}.branches:has(.branch:nth-child(5)) .branch:before{content:'→';left:-1.95rem;top:1rem}.branches:has(.branch:nth-child(5)) .branch{display:grid;grid-template-columns:1fr 1.2fr 1.2fr;align-items:center;gap:1rem;text-align:left}.branches:has(.branch:nth-child(5)) .branch h3{margin:0}.branches:has(.branch:nth-child(5)) .sample{border-top:0;padding-top:0}}
@media print{.lesson-body{line-height:1.45}.lesson-body p{margin:.65rem 0}.lesson-body h3{margin:1.3rem 0 .7rem}.example,.remember{margin:1rem 0;padding:.7rem 1rem}.example p{margin:.3rem 0}.branches{grid-template-columns:repeat(3,1fr)}.branches:has(.branch:nth-child(5)){grid-template-columns:1fr;border-top:0;border-left:1px solid #91adae;padding:0 0 0 5mm;margin-left:2mm;gap:2mm}.branches:has(.branch:nth-child(5)):before{left:-1px}.branches:has(.branch:nth-child(5)) .branch{display:grid;grid-template-columns:1fr 1.2fr 1.2fr;align-items:center;text-align:left;gap:3mm}.branches:has(.branch:nth-child(5)) .branch:before{content:'→';left:-6mm;top:3mm}.branches:has(.branch:nth-child(5)) .sample{border-top:0;padding-top:0}}