/* Aula · Quiz Patente Ufficiale — design tokens shared with the app
   (colors.dart: violet #3700A4, orange #F29915; Inter). Slides are sized in
   container units so the same markup works in a thumbnail, in the page and
   full screen on a classroom board. */

@font-face{font-family:Inter;font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/inter-400.2c2e33325742.woff2) format("woff2")}
@font-face{font-family:Inter;font-style:normal;font-weight:500;font-display:swap;src:url(/assets/fonts/inter-500.f39ef5ad22e2.woff2) format("woff2")}
@font-face{font-family:Inter;font-style:normal;font-weight:600;font-display:swap;src:url(/assets/fonts/inter-600.66a56851012c.woff2) format("woff2")}
@font-face{font-family:Inter;font-style:normal;font-weight:700;font-display:swap;src:url(/assets/fonts/inter-700.f9007cf50750.woff2) format("woff2")}
@font-face{font-family:Inter;font-style:normal;font-weight:800;font-display:swap;src:url(/assets/fonts/inter-800.c742e08e5587.woff2) format("woff2")}

:root{
  --ink:#17131F; --ink-2:#4A4556; --ink-3:#6E6979;
  --paper:#FFFFFF; --paper-2:#F7F6FA; --paper-3:#EFECF5;
  --line:#E4E0EB; --line-2:#CFC9DA;
  --violet:#3700A4; --violet-700:#29007C; --violet-600:#4A12C4; --violet-100:#EEE8FB; --violet-50:#F8F5FE;
  --orange:#F29915; --orange-700:#A35F00; --orange-100:#FFF1DC;
  --true:#2B7A0B; --true-100:#E6F4DD; --false:#C23A17; --false-100:#FCE9E3;
  --sign-red:#C1121F; --sign-blue:#0A5BAA; --sign-yellow:#FFC400;
  --board:#110E17;
  --radius:14px; --radius-lg:22px; --pill:999px;
  --shadow:0 1px 2px rgba(23,19,31,.06),0 6px 24px rgba(23,19,31,.06);
  --shadow-lg:0 2px 6px rgba(23,19,31,.08),0 24px 60px rgba(23,19,31,.14);
  --focus:0 0 0 3px #fff,0 0 0 6px var(--orange);
  --font:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  color-scheme:light;
}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none !important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.55 var(--font);font-feature-settings:"cv11","ss01";text-rendering:optimizeLegibility}
img,svg{max-width:100%}
img{height:auto}
a{color:var(--violet);text-underline-offset:.18em;text-decoration-thickness:.08em}
a:hover{color:var(--violet-600)}
h1,h2,h3{line-height:1.12;letter-spacing:-.022em;margin:0 0 .5em;font-weight:800}
h1{font-size:clamp(2rem,1.3rem + 2.6vw,3.35rem);letter-spacing:-.035em}
h2{font-size:clamp(1.4rem,1.1rem + 1vw,2rem)}
h3{font-size:1.2rem}
p{margin:0 0 1em}
ul,ol{padding-left:1.25em}
kbd{display:inline-block;min-width:1.9em;padding:.12em .45em;border:1px solid var(--line-2);border-bottom-width:3px;border-radius:7px;background:#fff;font:700 .82em/1.3 var(--font);text-align:center;color:var(--ink)}
:focus-visible{outline:none;box-shadow:var(--focus);border-radius:6px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:12px;top:-60px;z-index:100;padding:10px 16px;background:var(--ink);color:#fff;border-radius:10px}
.skip:focus{top:12px}
.icon{width:1.2em;height:1.2em;flex:none;vertical-align:-.22em}
.icon.mini{width:1em;height:1em}
.small{font-size:.9rem}
.muted{color:var(--ink-3)}
.center{text-align:center}
main{outline:none}

/* ------------------------------------------------------------ layout */
.wrap{width:min(1180px,100% - 32px);margin-inline:auto;padding:12px 0 72px}
.wrap.wide{width:min(1440px,100% - 32px)}
.wrap.narrow{width:min(780px,100% - 32px)}
.band{width:min(1180px,100% - 32px);margin:0 auto;padding:72px 0 8px}
.band-head{max-width:760px;margin-bottom:28px}
.band-head p{color:var(--ink-2);font-size:1.08rem}
.band-foot{margin-top:22px}
.eyebrow{font-size:.8rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--violet);margin-bottom:.8em}
.lead{font-size:clamp(1.05rem,1rem + .3vw,1.22rem);color:var(--ink-2);max-width:62ch}
.page-head{padding:18px 0 30px}
.page-head.center{text-align:center}.page-head.center .lead{margin-inline:auto}
.head-actions,.hero-actions,.lesson-actions,.form-actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:18px}
.text-link{font-weight:700;text-decoration:none;display:inline-flex;align-items:center;gap:.35em}
.text-link:hover{text-decoration:underline}

/* ------------------------------------------------------------ topbar */
.topbar{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.92);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.topbar-inner{width:min(1440px,100% - 32px);margin:0 auto;height:64px;display:flex;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;flex:none}
.brand-mark{width:34px;height:34px}
.brand-text{display:flex;flex-direction:column;line-height:1.05}
.brand-text strong{font-size:1.15rem;letter-spacing:-.02em}
.brand-text small{font-size:.72rem;color:var(--ink-3);font-weight:600}
.nav{flex:1;display:flex;justify-content:center}
.nav ul{display:flex;gap:4px;list-style:none;margin:0;padding:0}
.nav a{display:block;padding:8px 12px;border-radius:var(--pill);color:var(--ink-2);font-weight:600;font-size:.95rem;text-decoration:none}
.nav a:hover{background:var(--paper-2);color:var(--ink)}
.nav a[aria-current]{background:var(--violet-100);color:var(--violet)}
.nav-toggle{display:none}
.account-link{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border:1px solid var(--line-2);border-radius:var(--pill);font-weight:700;font-size:.92rem;color:var(--ink);text-decoration:none;flex:none}
.account-link:hover{border-color:var(--violet);color:var(--violet)}
.account-link .avatar{width:26px;height:26px;border-radius:50%;background:var(--violet);color:#fff;display:grid;place-items:center;font-size:.8rem;margin:-3px 0 -3px -6px}
@media (max-width:980px){
  .nav{justify-content:flex-end}
  .nav-toggle{display:inline-grid;place-items:center;width:44px;height:44px;border:1px solid var(--line-2);border-radius:12px;background:#fff;color:var(--ink);cursor:pointer}
  .nav-toggle .icon{width:22px;height:22px}
  .nav ul{display:none;position:absolute;top:64px;left:0;right:0;flex-direction:column;background:#fff;border-bottom:1px solid var(--line);padding:10px 16px 16px;box-shadow:var(--shadow-lg)}
  .nav.open ul{display:flex}
  .nav a{padding:12px 14px;font-size:1.05rem}
  .account-link span{display:none}
  .account-link{padding:10px}
  .brand-text small{display:none}
}

/* ------------------------------------------------------------ buttons */
.button{display:inline-flex;align-items:center;justify-content:center;gap:.5em;min-height:46px;padding:10px 20px;border-radius:var(--pill);border:1.5px solid var(--line-2);background:#fff;color:var(--ink);font:700 .98rem/1.1 var(--font);text-decoration:none;cursor:pointer;transition:background .15s,border-color .15s,transform .1s}
.button:hover{border-color:var(--ink-2);color:var(--ink)}
.button:active{transform:translateY(1px)}
.button.primary{background:var(--violet);border-color:var(--violet);color:#fff}
.button.primary:hover{background:var(--violet-700);border-color:var(--violet-700);color:#fff}
.button.ghost{background:transparent;border-color:transparent;color:var(--violet)}
.button.ghost:hover{background:var(--violet-50)}
.button.danger{color:var(--false);border-color:#f1c3b5}
.button.danger:hover{background:var(--false-100)}
.button.wide{width:100%}
.button[aria-pressed="true"]{background:var(--orange-100);border-color:var(--orange);color:var(--orange-700)}
.button[aria-pressed="true"] .icon{fill:currentColor}
.button:disabled{opacity:.5;cursor:not-allowed}
.icon-btn{width:46px;padding:0}
@media (max-width:640px){.icon-only-mobile span{display:none}.icon-only-mobile{width:46px;padding:0}}

.crumbs ol{display:flex;flex-wrap:wrap;gap:4px 0;list-style:none;padding:0;margin:14px 0 0;font-size:.88rem;color:var(--ink-3)}
.crumbs li:not(:last-child)::after{content:"/";margin:0 .55em;color:var(--line-2)}
.crumbs a{color:var(--ink-2);text-decoration:none}.crumbs a:hover{color:var(--violet);text-decoration:underline}
.crumbs [aria-current]{color:var(--ink-3)}

.tag{display:inline-block;padding:.12em .6em;border-radius:var(--pill);font-size:.78em;font-weight:800;letter-spacing:.02em;text-transform:uppercase}
.tag.true{background:var(--true-100);color:var(--true)}
.tag.false{background:var(--false-100);color:var(--false)}
.tag.pending{background:var(--paper-3);color:var(--ink-2)}
.letters{display:inline-flex;gap:4px;vertical-align:middle}
.letter{display:inline-grid;place-items:center;min-width:1.7em;height:1.7em;padding:0 .3em;border-radius:7px;background:var(--violet-100);color:var(--violet);font:800 .78rem/1 var(--font);text-transform:lowercase}

/* ------------------------------------------------------------ marks */
.mark{width:40px;height:40px;flex:none}
.mark.mini{width:22px;height:22px;vertical-align:-5px}
.big-mark{width:96px;height:96px;margin:40px auto 10px;display:block}

/* ------------------------------------------------------------ home */
.hero{width:min(1360px,100% - 32px);margin:0 auto;padding:48px 0 24px;display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);gap:56px;align-items:center}
.hero h1{font-size:clamp(2.3rem,1.4rem + 3.2vw,4.1rem);line-height:1.02;letter-spacing:-.045em}
.hero .lead{font-size:1.16rem}
.hero-foot{display:flex;gap:.5em;align-items:center;flex-wrap:wrap;margin-top:22px;color:var(--ink-3);font-size:.94rem}
.hero-foot .icon{color:var(--true)}
.hero-demo{margin:0}
.screen{background:var(--board);border-radius:26px;padding:14px 14px 12px;box-shadow:var(--shadow-lg);position:relative}
.screen .slide-frame{border-radius:12px}
.hero-tools{display:flex;align-items:center;gap:10px;padding:12px 6px 2px}
.swatch{width:30px;height:30px;border-radius:50%;border:3px solid rgba(255,255,255,.18);background:var(--c,#E5261F);cursor:pointer;padding:0}
.swatch[data-color="#E5261F"]{--c:#E5261F}.swatch[data-color="#1565D8"]{--c:#1565D8}.swatch[data-color="#F29915"]{--c:#F29915;border-radius:8px}
.swatch[aria-pressed="true"]{border-color:#fff;transform:scale(1.08)}
.tool-clear{margin-left:auto;background:transparent;border:1px solid rgba(255,255,255,.25);color:#fff;border-radius:var(--pill);padding:6px 14px;font:600 .88rem var(--font);cursor:pointer}
.tool-clear:hover{background:rgba(255,255,255,.1)}
.hero-demo figcaption{margin-top:12px;color:var(--ink-3);font-size:.92rem;text-align:center}
@media (max-width:960px){.hero{grid-template-columns:minmax(0,1fr);gap:34px;padding-top:28px}}

.course-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px}
.course-card{position:relative;display:flex;flex-direction:column;gap:8px;padding:26px;border-radius:var(--radius-lg);border:1px solid var(--line);background:linear-gradient(180deg,#fff,var(--paper-2));color:var(--ink);text-decoration:none;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s}
.course-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);color:var(--ink)}
.course-card strong{font-size:1.6rem;letter-spacing:-.03em}
.course-badge{align-self:flex-start;padding:4px 12px;border-radius:var(--pill);background:var(--violet);color:#fff;font-weight:800;font-size:.85rem}
.course-meta{color:var(--ink-2)}
.course-marks{display:flex;gap:6px;flex-wrap:wrap;margin:10px 0 6px}
.course-marks .mark{width:28px;height:28px}
.course-go{margin-top:auto;font-weight:700;color:var(--violet);display:inline-flex;gap:.4em;align-items:center}

.feature-grid{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px}
.feature-grid li{padding:20px;border:1px solid var(--line);border-radius:var(--radius);display:grid;gap:4px;background:#fff}
.feature-grid .keys{display:flex;gap:6px;margin-bottom:6px}
.feature-grid .keys kbd{font-size:1rem;min-width:2.2em;padding:.25em .5em}
.feature-grid span{color:var(--ink-2)}

.letter-strip{list-style:none;padding:0;margin:0 0 26px;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:8px}
.letter-strip li{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border-radius:12px;background:var(--paper-2);font-size:.9rem;color:var(--ink-2)}
.letter-strip .letter{flex:none}
.letter-strip li.covered .letter{background:var(--violet);color:#fff}
.tavole-preview,.tavole-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.tavole-grid.small{grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}
.tavola-card{display:flex;flex-direction:column;gap:6px;padding:12px 12px 16px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;color:var(--ink);text-decoration:none;transition:box-shadow .15s,transform .15s}
.tavola-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px);color:var(--ink)}
.tavola-thumb{display:block;aspect-ratio:16/9;border-radius:10px;background:var(--paper-2);overflow:hidden;margin-bottom:6px}
.tavola-thumb svg{width:100%;height:100%;display:block}
.tavola-summary{font-size:.9rem;color:var(--ink-2)}
.tavola-card strong{font-size:1.02rem}

.program-cards,.program-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
.program-card{display:flex;flex-direction:column;gap:8px;padding:22px;border-radius:var(--radius-lg);background:var(--violet-50);border:1px solid var(--violet-100);color:var(--ink);text-decoration:none}
.program-card:hover{border-color:var(--violet);color:var(--ink)}
.program-card strong{font-size:1.18rem}
.program-card span{color:var(--ink-2)}
.program-card small{color:var(--ink-3)}
.program-badge{align-self:flex-start;font:800 1.5rem/1 var(--font);color:var(--violet);letter-spacing:-.03em}

.student-band{display:flex;gap:40px;align-items:center;justify-content:space-between;padding-bottom:40px}
.student-copy{max-width:660px}
.student-copy p{color:var(--ink-2);font-size:1.08rem}
.william{width:200px;flex:none}
@media (max-width:760px){.student-band{flex-direction:column-reverse;align-items:flex-start}.william{width:120px}}

/* ------------------------------------------------------------ course */
.chapter-index{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.chapter-row{display:flex;gap:10px;align-items:center}
.chapter-link{flex:1;display:grid;grid-template-columns:3.2rem 44px 1fr auto;gap:16px;align-items:center;padding:14px 18px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;color:var(--ink);text-decoration:none;transition:border-color .15s,box-shadow .15s}
.chapter-link:hover{border-color:var(--violet);box-shadow:var(--shadow);color:var(--ink)}
.chapter-n{font:800 1.9rem/1 var(--font);letter-spacing:-.04em;color:var(--violet);font-variant-numeric:tabular-nums;text-align:right}
.chapter-name{display:flex;flex-direction:column}
.chapter-name strong{font-size:1.08rem}
.chapter-name small{color:var(--ink-3);font-size:.86rem}
.chapter-count{text-align:right;font-weight:700;font-size:.9rem;color:var(--ink-2);line-height:1.25}
.chapter-count small{font-weight:500;color:var(--ink-3)}
.chapter-progress{grid-column:3/-1;height:6px;border-radius:6px;background:var(--paper-3);overflow:hidden}
.chapter-progress i{display:block;height:100%;background:var(--true)}
@media (max-width:640px){.chapter-link{grid-template-columns:2.2rem 34px 1fr;gap:10px;padding:12px}.chapter-count{display:none}.chapter-n{font-size:1.4rem}.chapter-link .mark{width:34px;height:34px}}
.note-block{margin-top:48px;padding:28px;border-radius:var(--radius-lg);background:var(--paper-2)}
.quiz-launch fieldset{border:0;padding:0;margin:0 0 14px}
.quiz-launch legend{font-weight:700;margin-bottom:10px}
.chip-grid{display:flex;flex-wrap:wrap;gap:8px}
.chip input{position:absolute;opacity:0}
.chip span{display:inline-block;padding:7px 12px;border-radius:var(--pill);border:1.5px solid var(--line-2);background:#fff;font-size:.9rem;font-weight:600;cursor:pointer}
.chip input:checked+span{background:var(--violet);border-color:var(--violet);color:#fff}
.chip input:focus-visible+span{box-shadow:var(--focus)}
.inline-field{display:inline-flex;gap:8px;align-items:center;font-weight:700;margin-right:12px}
select,input,textarea{font:inherit;color:inherit}
select,input:not([type=checkbox]):not([type=radio]),textarea{border:1.5px solid var(--line-2);border-radius:10px;padding:10px 12px;background:#fff;width:100%}
.inline-field select{width:auto}
select:focus,input:focus,textarea:focus{outline:none;border-color:var(--violet);box-shadow:0 0 0 3px var(--violet-100)}

/* ------------------------------------------------------------ chapter */
.chapter-head{display:grid;grid-template-columns:auto 1fr;gap:34px;align-items:center}
.chapter-hero{position:relative;width:170px;height:170px}
.chapter-bignum{position:absolute;inset:0;font:800 150px/1 var(--font);letter-spacing:-.07em;color:var(--violet-100);display:grid;place-items:center;font-variant-numeric:tabular-nums}
.chapter-hero-mark{position:absolute;width:86px;height:86px;right:4px;bottom:4px;filter:drop-shadow(0 6px 12px rgba(23,19,31,.18))}
@media (max-width:760px){.chapter-head{grid-template-columns:1fr}.chapter-hero{width:110px;height:110px}.chapter-bignum{font-size:96px}.chapter-hero-mark{width:56px;height:56px}}
.lesson-grid{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:10px}
.lesson-grid.visual{grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}
.lesson-card{position:relative;display:flex;gap:14px;align-items:center;height:100%;padding:14px 16px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;color:var(--ink);text-decoration:none;transition:border-color .15s,box-shadow .15s}
.lesson-card:hover{border-color:var(--violet);box-shadow:var(--shadow);color:var(--ink)}
.lesson-grid.visual .lesson-card{flex-direction:column;align-items:stretch;padding:12px}
.lesson-thumb{display:grid;place-items:center;flex:none;width:72px;height:72px;border-radius:10px;background:var(--paper-2);overflow:hidden}
.lesson-grid.visual .lesson-thumb{width:100%;height:auto;aspect-ratio:4/3}
.lesson-thumb img{max-width:88%;max-height:88%;object-fit:contain}
.lesson-card-text{display:grid;gap:2px}
.lesson-card-text strong{font-size:1rem;line-height:1.3}
.lesson-card-text small{color:var(--ink-3)}
.lesson-index{font:800 .8rem/1 var(--font);color:var(--violet)}
.lesson-state{position:absolute;top:10px;right:10px;width:22px;height:22px;border-radius:50%;background:var(--true);color:#fff;display:grid;place-items:center}
.lesson-state svg{width:14px;height:14px}
.pager{display:flex;justify-content:space-between;gap:16px;margin-top:40px}
.pager a{display:flex;gap:12px;align-items:center;max-width:48%;padding:14px 18px;border:1px solid var(--line);border-radius:var(--radius);text-decoration:none;color:var(--ink);font-weight:700}
.pager a:hover{border-color:var(--violet);color:var(--ink)}
.pager small{display:block;font-weight:500;color:var(--ink-3);font-size:.82rem}
.pager-next{margin-left:auto;text-align:right}

/* ------------------------------------------------------------ lesson */
.lesson-head{padding:16px 0 26px}
.kicker{display:flex;gap:10px;align-items:center;font-weight:700;color:var(--ink-2);margin-bottom:12px}
.kicker-mark{width:30px;height:30px}
.lesson-head h1{max-width:24ch}
.lesson-body{display:grid;gap:40px}
.lesson-body.with-figure{grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);align-items:start}
@media (max-width:860px){.lesson-body.with-figure{grid-template-columns:1fr}}
.lesson-figure{margin:0;position:sticky;top:84px}
.lesson-figure .zoomable{display:grid;place-items:center;width:100%;min-height:220px;padding:28px;border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--paper-2);cursor:zoom-in}
.lesson-figure img{max-height:360px;object-fit:contain}
.lesson-figure figcaption{margin-top:8px;font-size:.85rem;color:var(--ink-3);text-align:center}
@media (max-width:860px){.lesson-figure{position:static}}
.prose{font-size:1.1rem;max-width:68ch}
.prose ul{margin:0 0 1em}
.prose li{margin:.3em 0}
.prose h2{margin-top:1.4em}
.traps{margin:28px 0 0;padding:20px 22px;border-radius:var(--radius);background:var(--false-100);border-left:6px solid var(--false)}
.traps h2{display:flex;gap:.45em;align-items:center;font-size:1.08rem;color:var(--false);margin:0 0 10px;letter-spacing:0}
.traps ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.traps li{display:flex;gap:10px;align-items:baseline;font-size:1rem}
.note-panel{margin-top:28px;padding:20px;border-radius:var(--radius);background:var(--orange-100);border:1px solid #f7d6a6}
.note-panel h2{font-size:1.05rem;letter-spacing:0}
.note-actions{display:flex;gap:12px;align-items:center;margin-top:10px}
.note-status{font-size:.9rem;color:var(--ink-2)}
.check{margin-top:52px}
.check-head{display:flex;flex-wrap:wrap;gap:4px 24px;align-items:baseline;justify-content:space-between;margin-bottom:14px}
.check-head p{color:var(--ink-2);margin:0}
.questions{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.question{display:grid;grid-template-columns:auto 1fr auto;gap:16px;align-items:center;padding:14px 16px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
.question:not(:has(.q-fig)){grid-template-columns:1fr auto}
.q-fig{width:84px;height:84px;object-fit:contain}
.q-text{margin:0;font-size:1.02rem}
.q-actions{display:flex;gap:8px;align-items:center}
.answer{min-width:74px;min-height:42px;border-radius:var(--pill);border:1.5px solid var(--line-2);background:#fff;font:700 .95rem var(--font);cursor:pointer}
.answer:hover{border-color:var(--ink-2)}
.question[data-state] .answer{cursor:default}
.question[data-state] .answer.chosen.right{background:var(--true);border-color:var(--true);color:#fff}
.question[data-state] .answer.chosen.wrong{background:var(--false);border-color:var(--false);color:#fff}
.question[data-state] .answer.correct:not(.chosen){border-color:var(--true);color:var(--true)}
.question[data-state="right"]{border-color:#bfe0ae;background:#fbfef9}
.question[data-state="wrong"]{border-color:#f1c3b5;background:#fffaf8}
.q-solution summary{cursor:pointer;color:var(--ink-3);font-size:.85rem}
.js .q-solution{display:none}
@media (max-width:700px){.question,.question:not(:has(.q-fig)){grid-template-columns:1fr}.q-fig{width:110px;height:110px}.q-actions .answer{flex:1}}
.app-cta{display:flex;gap:18px;align-items:center;margin-top:48px;padding:20px 22px;border-radius:var(--radius-lg);background:var(--violet-50);border:1px solid var(--violet-100)}
.app-cta div{flex:1}
.app-cta p{margin:0;color:var(--ink-2)}
@media (max-width:640px){.app-cta{flex-wrap:wrap}}

/* ------------------------------------------------------------ tavole */
.tavole-group{margin-top:34px}
.group-lead{color:var(--ink-2);margin-top:-6px}
.tavola-head .letters{margin-left:6px}
.tavola-viewer{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:22px;align-items:start}
@media (max-width:1100px){.tavola-viewer{grid-template-columns:1fr}}
.tavola-canvas{border:1px solid var(--line);border-radius:var(--radius-lg);background:#fff;overflow:hidden}
.tavola-art{position:relative;aspect-ratio:16/9}
.tavola-art svg{width:100%;height:100%;display:block}
.tavola-steps{display:flex;gap:12px;align-items:center;padding:12px 14px;border-top:1px solid var(--line);background:var(--paper-2)}
.step-text{flex:1;display:grid;gap:2px;min-height:3.2em}
.step-text strong{font-size:1rem}
.step-text span{color:var(--ink-2);font-size:.95rem}
.tavola-parts{border:1px solid var(--line);border-radius:var(--radius-lg);padding:16px;background:#fff;max-height:calc(100vh - 110px);overflow:auto;position:sticky;top:80px}
@media (max-width:1100px){.tavola-parts{position:static;max-height:none}}
.tavola-parts h2{font-size:1.05rem;letter-spacing:0;margin-bottom:10px}
.parts-list{list-style:none;padding:0;margin:0;display:grid;gap:4px}
.parts-list button{display:flex;gap:10px;align-items:center;width:100%;padding:8px 10px;border:0;border-radius:10px;background:transparent;text-align:left;font:600 .96rem var(--font);color:var(--ink);cursor:pointer}
.parts-list button:hover{background:var(--paper-2)}
.parts-list button[aria-pressed="true"]{background:var(--violet-100);color:var(--violet)}
.part-n{flex:none;display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--violet);color:#fff;font:800 .85rem var(--font)}
.part-text{margin:4px 10px 10px 48px;font-size:.93rem;color:var(--ink-2)}
/* Badges and highlighting are drawn by tavola.mjs inside the SVG. */
.tv-badge{cursor:pointer}
.tv-badge circle{fill:var(--violet);stroke:#fff;stroke-width:4;transition:fill .15s}
.tv-badge text{font:800 24px Inter,Arial,sans-serif;fill:#fff;pointer-events:none}
.tv-badge.active circle,.tv-badge:hover circle{fill:var(--orange)}
.tv-dim [data-part]:not(.tv-on){opacity:.22;transition:opacity .25s}
.tv-dim [data-part].tv-on{opacity:1;filter:drop-shadow(0 0 8px rgba(242,153,21,.9)) drop-shadow(0 0 2px rgba(242,153,21,1))}
[data-part]{transition:opacity .25s,filter .25s}
.related{margin-top:48px}
.tavola-check{margin-top:40px}

/* ------------------------------------------------------------ segnaletica */
.jump{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}
.jump a{display:inline-flex;gap:8px;align-items:center;padding:7px 12px;border-radius:var(--pill);border:1px solid var(--line);text-decoration:none;color:var(--ink);font-weight:600;font-size:.92rem}
.jump a:hover{border-color:var(--violet)}
.signal-group{margin-top:42px;scroll-margin-top:80px}
.signal-head{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.signal-head h2{display:flex;gap:12px;align-items:center}
.signal-grid{list-style:none;padding:0;margin:14px 0 0;display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.signal-grid a{display:flex;flex-direction:column;align-items:center;gap:8px;height:100%;padding:14px 10px;border:1px solid var(--line);border-radius:var(--radius);color:var(--ink);text-decoration:none;text-align:center;font-size:.86rem;font-weight:600;line-height:1.3}
.signal-grid a:hover{border-color:var(--violet);box-shadow:var(--shadow)}
.signal-grid img{width:100px;height:100px;object-fit:contain}

/* ------------------------------------------------------------ programmi */
.norm{display:flex;gap:.5em;align-items:flex-start;color:var(--ink-2);font-size:.95rem;max-width:70ch}
.norm .icon{margin-top:.2em;color:var(--violet)}
.hours{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.hour{display:grid;grid-template-columns:78px 1fr auto;gap:18px;align-items:center;padding:16px 18px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;scroll-margin-top:80px}
.hour-n{display:grid;place-items:center;text-align:center;line-height:1}
.hour-n span{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-3)}
.hour-n strong{font:800 2.2rem/1 var(--font);color:var(--violet);letter-spacing:-.04em}
.hour h2{font-size:1.1rem;letter-spacing:-.01em;margin-bottom:6px}
.hour-items{list-style:none;padding:0;margin:0;display:grid;gap:4px;font-size:.95rem}
.hour-items li{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.hour-items small{color:var(--ink-3)}
@media (max-width:700px){.hour{grid-template-columns:52px 1fr}.hour>.button{grid-column:1/-1}}

/* ------------------------------------------------------------ conformità */
.conformity-table{width:100%;border-collapse:separate;border-spacing:0 8px;margin:10px 0 24px}
.conformity-table th,.conformity-table td{padding:14px 16px;background:var(--paper-2);vertical-align:top;text-align:left}
.conformity-table thead th{background:none;font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-3);padding-block:4px}
.conformity-table tbody th{border-radius:12px 0 0 12px;width:56px}
.conformity-table tbody td:last-child{border-radius:0 12px 12px 0;width:42%}
.conformity-table tr.covered .letter{background:var(--violet);color:#fff}
.plain{list-style:none;padding:0;margin:0;display:grid;gap:4px;font-size:.93rem}
.facts{list-style:none;padding:0;display:grid;gap:10px;margin:24px 0}
.facts li{display:flex;gap:10px;color:var(--ink-2)}
.facts .icon{color:var(--violet);margin-top:.2em}
@media (max-width:760px){.conformity-table thead{display:none}.conformity-table tr{display:grid;grid-template-columns:56px 1fr}.conformity-table tbody td:last-child{grid-column:1/-1;width:auto;border-radius:0 0 12px 12px}.conformity-table tbody td:nth-child(2){border-radius:0 12px 0 0}.conformity-table tbody th{border-radius:12px 0 0 0}}
.declaration-tool{margin-top:48px;padding:28px;border-radius:var(--radius-lg);border:1px solid var(--line)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px 18px}
.form-grid label,.auth-form label{display:grid;gap:6px;font-weight:600;font-size:.95rem}
.form-grid .span-2{grid-column:1/-1}
.form-grid fieldset{border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.form-grid legend{font-weight:700;padding:0 6px}
.check-inline{display:inline-flex !important;grid-template-columns:none;gap:8px;align-items:center;font-weight:500 !important;margin-right:18px}
.check-inline input{width:20px;height:20px;accent-color:var(--violet)}
@media (max-width:640px){.form-grid{grid-template-columns:1fr}}
.print-doc{margin-top:36px;padding:36px;border:1px solid var(--line);border-radius:var(--radius-lg);font-size:1rem;line-height:1.6}
.print-doc .print-title{font-size:1.5rem;letter-spacing:-.01em;text-align:left}
.print-doc h2{font-size:1.15rem;text-align:center;letter-spacing:.02em;margin:18px 0}
.print-sub{color:var(--ink-3);font-size:.88rem}
.print-sign{display:flex;justify-content:space-between;gap:24px;margin-top:36px}
.print-note{font-size:.85rem;color:var(--ink-3)}
.print-table{width:100%;border-collapse:collapse;font-size:.85rem}
.print-table th,.print-table td{border:1px solid var(--line-2);padding:6px 8px;vertical-align:top;text-align:left}

/* ------------------------------------------------------------ guida, auth, mine */
.keys-table{width:100%;border-collapse:collapse;margin:10px 0 24px}
.keys-table td{padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.keys-table td:first-child{white-space:nowrap;width:1%}
.auth{max-width:480px;margin:0 auto;border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px;box-shadow:var(--shadow)}
.tabs{display:flex;gap:4px;padding:4px;border-radius:var(--pill);background:var(--paper-2);margin-bottom:22px;overflow-x:auto}
.tabs button{flex:1;padding:10px 16px;border:0;border-radius:var(--pill);background:transparent;font:700 .95rem var(--font);color:var(--ink-2);cursor:pointer;white-space:nowrap}
.tabs button[aria-selected="true"]{background:#fff;color:var(--violet);box-shadow:var(--shadow)}
.auth-form{display:grid;gap:14px}
.auth-form small{font-weight:400;color:var(--ink-3)}
.roles{border:0;padding:0;margin:0;display:grid;gap:8px}
.roles legend{font-weight:700;margin-bottom:8px}
.radio{display:flex !important;gap:12px;align-items:center;padding:12px;border:1.5px solid var(--line-2);border-radius:12px;cursor:pointer}
.radio:has(input:checked){border-color:var(--violet);background:var(--violet-50)}
.radio input{width:20px;height:20px;accent-color:var(--violet)}
.radio span{display:grid}
.radio small{font-weight:400}
.form-error{margin:0;padding:10px 12px;border-radius:10px;background:var(--false-100);color:var(--false);font-weight:600}
.mine [role=tabpanel]{min-height:200px}
.mine-list{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.mine-item{display:flex;gap:14px;align-items:center;justify-content:space-between;padding:14px 16px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
.mine-item a{font-weight:700;text-decoration:none;color:var(--ink)}
.mine-item a:hover{color:var(--violet)}
.mine-item p{margin:4px 0 0;color:var(--ink-2);font-size:.93rem;white-space:pre-wrap}
.mine-item small{color:var(--ink-3)}
.mine-item .row-actions{display:flex;gap:6px;flex:none}
.empty{padding:28px;border:1.5px dashed var(--line-2);border-radius:var(--radius);text-align:center;color:var(--ink-2)}
.progress-course{margin-bottom:26px}
.progress-bar{height:10px;border-radius:10px;background:var(--paper-3);overflow:hidden;margin:8px 0}
.progress-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--violet),var(--violet-600))}
.stat-row{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:20px}
.stat{padding:14px 18px;border-radius:var(--radius);background:var(--paper-2);min-width:150px}
.stat strong{display:block;font:800 1.7rem/1.1 var(--font);letter-spacing:-.03em}
.stat span{color:var(--ink-2);font-size:.9rem}

/* deck editor */
.deck-head{display:grid;gap:10px}
.deck-title-field input{font:800 clamp(1.4rem,1rem + 1.6vw,2.2rem)/1.2 var(--font);letter-spacing:-.03em;border:0;border-bottom:2px solid var(--line);border-radius:0;padding:6px 0}
.deck-title-field input:focus{box-shadow:none;border-color:var(--violet)}
.save-state{font-size:.9rem;color:var(--ink-3)}
.deck-editor{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:28px;align-items:start}
@media (max-width:980px){.deck-editor{grid-template-columns:1fr}}
.sequence{list-style:none;padding:0;margin:0;display:grid;gap:8px;counter-reset:seq}
.seq-item{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:#fff;counter-increment:seq}
.seq-item::before{content:counter(seq);font:800 .9rem var(--font);color:var(--violet);min-width:1.6em;text-align:right}
.seq-item.dragging{opacity:.5}
.seq-item.hidden-item{opacity:.55;background:var(--paper-2)}
.seq-item strong{display:block;font-size:.98rem}
.seq-item small{color:var(--ink-3)}
.seq-actions{display:flex;gap:4px}
.seq-actions button{width:36px;height:36px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;display:grid;place-items:center;color:var(--ink-2)}
.seq-actions button:hover{border-color:var(--ink-2);color:var(--ink)}
.search-field{display:flex;gap:8px;align-items:center;border:1.5px solid var(--line-2);border-radius:var(--pill);padding:0 14px;background:#fff}
.search-field input{border:0 !important;box-shadow:none !important;padding:10px 0 !important}
.library{margin-top:12px;max-height:520px;overflow:auto;display:grid;gap:4px}
.lib-item{display:flex;gap:10px;align-items:center;justify-content:space-between;padding:8px 10px;border-radius:10px}
.lib-item:hover{background:var(--paper-2)}
.lib-item small{color:var(--ink-3)}
.lib-group{font:800 .78rem var(--font);text-transform:uppercase;letter-spacing:.06em;color:var(--ink-3);padding:12px 10px 4px}
.custom-slide{margin-top:18px;border:1px solid var(--line);border-radius:var(--radius);padding:12px 16px}
.custom-slide summary{cursor:pointer;font-weight:700;display:flex;gap:6px;align-items:center}
.custom-slide form{display:grid;gap:12px;margin-top:12px}
.custom-slide label{display:grid;gap:6px;font-weight:600}

/* ------------------------------------------------------------ slides */
.slide-frame{position:relative;aspect-ratio:16/9;width:100%;background:#fff;overflow:hidden;container-type:inline-size;user-select:none;-webkit-user-select:none}
.slide{position:absolute;inset:0;display:flex;flex-direction:column;padding:4.2cqw 5cqw 3.2cqw;background:#fff;color:var(--ink);font-family:var(--font)}
.slide-kicker{display:flex;gap:1.1cqw;align-items:center;font:700 1.35cqw/1.2 var(--font);text-transform:uppercase;letter-spacing:.09em;color:var(--ink-2);margin-bottom:1.6cqw}
.slide-mark{width:2.6cqw;height:2.6cqw}
.slide-grid{flex:1;display:grid;grid-template-columns:1fr;gap:3.2cqw;min-height:0}
.slide.has-figure .slide-grid{grid-template-columns:40% 1fr}
.slide-figure{display:grid;place-items:center;min-height:0;border-radius:1.6cqw;background:var(--paper-2);padding:2cqw;position:relative}
.slide-figure img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain}
.slide-figure.zoomed{position:absolute;inset:3cqw 5cqw 5cqw;z-index:3;background:#fff;box-shadow:var(--shadow-lg)}
.slide-text{display:flex;flex-direction:column;min-height:0}
.slide-title{font:800 3.3cqw/1.08 var(--font);letter-spacing:-.035em;margin:0 0 1.8cqw;color:var(--ink)}
.slide.cont .slide-title{font-size:2.2cqw;color:var(--ink-2);letter-spacing:-.02em}
.slide-body{font-size:2.2cqw;line-height:1.36;color:var(--ink)}
.slide-body p{margin:0 0 1.1cqw}
.slide-body ul{margin:0 0 1.1cqw;padding-left:2.4cqw}
.slide-body li{margin:.45cqw 0}
.slide-body li::marker{color:var(--orange)}
.slide.dense .slide-body{font-size:1.85cqw}
.slide.xdense .slide-body{font-size:1.55cqw}
.slide-foot{display:flex;justify-content:space-between;margin-top:1.4cqw;padding-top:1cqw;border-top:.12cqw solid var(--line);font:600 1cqw var(--font);color:var(--ink-3)}
/* cover */
.slide-cover{justify-content:center;background:radial-gradient(120% 90% at 100% 0,var(--violet-50),#fff 60%)}
.cover-num{font:800 16cqw/.82 var(--font);letter-spacing:-.07em;color:var(--violet);font-variant-numeric:tabular-nums}
.cover-mark{position:absolute;right:6cqw;top:7cqw;width:14cqw;height:14cqw}
.cover-title{font:800 4.8cqw/1.02 var(--font);letter-spacing:-.045em;margin:1.4cqw 0 1.6cqw;max-width:70%}
.cover-meta{font:600 1.7cqw var(--font);color:var(--ink-2)}
.cover-list{columns:2;gap:3cqw;font-size:1.45cqw;color:var(--ink-2);margin-top:2cqw;padding-left:2cqw;max-height:14cqw;overflow:hidden}
/* trap */
.slide-trap .slide-title{color:var(--false);display:flex;gap:1cqw;align-items:center}
.slide-trap .slide-title svg{width:3.2cqw;height:3.2cqw}
.trap-list{list-style:none;padding:0;margin:0;display:grid;gap:1.4cqw}
.trap-list li{display:flex;gap:1.4cqw;align-items:baseline;font-size:2.15cqw;line-height:1.35;padding:1.4cqw 1.8cqw;border-radius:1.2cqw;background:var(--false-100)}
.trap-list .tag{font-size:1.2cqw;flex:none}
/* quiz */
.slide-quiz .quiz-label{display:flex;gap:1cqw;align-items:center;font:800 1.35cqw var(--font);color:var(--violet);text-transform:uppercase;letter-spacing:.09em;margin-bottom:1.4cqw}
.quiz-statement{font:700 3cqw/1.25 var(--font);letter-spacing:-.02em;margin:0 0 2.4cqw}
.slide-quiz.has-figure .quiz-statement{font-size:2.6cqw}
.quiz-choices{display:flex;gap:2cqw;margin-top:auto}
.quiz-choice{flex:1;display:grid;place-items:center;height:7.2cqw;border-radius:1.4cqw;border:.3cqw solid var(--line-2);font:800 2.8cqw var(--font);color:var(--ink-2);transition:all .3s}
.slide-quiz.revealed .quiz-choice.is-answer{background:var(--true);border-color:var(--true);color:#fff}
.slide-quiz.revealed .quiz-choice.is-answer.f{background:var(--false);border-color:var(--false)}
.slide-quiz.revealed .quiz-choice:not(.is-answer){opacity:.35}
.quiz-hint{font:600 1.2cqw var(--font);color:var(--ink-3);margin-top:1.2cqw;text-align:center}
.slide-quiz.revealed .quiz-hint{visibility:hidden}
/* tavola slide */
.slide-tavola{padding:2.4cqw 3cqw 2cqw}
.slide-tavola .tav-wrap{flex:1;display:grid;grid-template-columns:1fr 27%;gap:2cqw;min-height:0}
.slide-tavola .tav-art{min-height:0;display:grid;place-items:center}
.slide-tavola .tav-art svg{width:100%;height:100%}
.slide-tavola .tav-side{display:flex;flex-direction:column;gap:1cqw;min-height:0;border-left:.15cqw solid var(--line);padding-left:1.8cqw}
.slide-tavola .tav-title{font:800 2.2cqw/1.1 var(--font);letter-spacing:-.03em;margin:0}
.slide-tavola .tav-step{font:800 1.5cqw/1.2 var(--font);color:var(--violet);margin:0}
.slide-tavola .tav-text{font-size:1.45cqw;line-height:1.4;color:var(--ink);margin:0}
.slide-tavola .tav-part{margin-top:auto;padding:1.2cqw;border-radius:1cqw;background:var(--orange-100);font-size:1.3cqw;line-height:1.35}
.slide-tavola .tav-part strong{display:block;font-size:1.4cqw;margin-bottom:.3cqw}
.slide-tavola .tav-progress{display:flex;gap:.5cqw}
.slide-tavola .tav-progress i{flex:1;height:.4cqw;border-radius:1cqw;background:var(--line)}
.slide-tavola .tav-progress i.on{background:var(--violet)}
/* custom */
.slide-custom .slide-figure{background:#fff;border:.15cqw solid var(--line)}
/* board (lavagna bianca) */
.slide-board{background:#fff}
.ink-layer{position:absolute;inset:0;width:100%;height:100%;touch-action:none;z-index:4}
.ink-layer.off{pointer-events:none}

/* ------------------------------------------------------------ presentation */
.pres{position:fixed;inset:0;z-index:1000;background:#07060A;display:grid;place-items:center;color:#fff;font-family:var(--font)}
.pres[hidden]{display:none}
.pres-stage{position:relative;width:min(100vw,calc(100vh * 16 / 9));aspect-ratio:16/9;background:#fff;box-shadow:0 0 0 1px rgba(255,255,255,.06)}
.pres-stage .slide-frame{position:absolute;inset:0;aspect-ratio:auto;height:100%}
.pres.cursor-hidden,.pres.cursor-hidden *{cursor:none !important}
.pres-curtain{position:absolute;inset:0;z-index:8;background:#000;display:none}
.pres[data-curtain="black"] .pres-curtain{display:block}
.pres[data-curtain="white"] [data-frame] [data-slide]{visibility:hidden}
.pres-progress{position:absolute;left:0;bottom:0;height:.35cqw;background:var(--orange);z-index:6;transition:width .25s}
.pres-laser{position:absolute;z-index:9;width:22px;height:22px;margin:-11px 0 0 -11px;border-radius:50%;background:radial-gradient(circle,#ff2d2d 0 34%,rgba(255,45,45,.45) 35% 60%,rgba(255,45,45,0) 61%);pointer-events:none;display:none}
.pres[data-tool="laser"] .pres-laser.on{display:block}
.pres-bar{position:fixed;left:50%;bottom:10px;transform:translateX(-50%);z-index:20;display:flex;gap:2px;align-items:center;padding:4px;border-radius:14px;background:rgba(23,19,31,.88);box-shadow:0 10px 40px rgba(0,0,0,.45);transition:opacity .3s,transform .3s;max-width:calc(100vw - 20px);overflow-x:auto}
.pres.idle .pres-bar{opacity:0;transform:translate(-50%,16px);pointer-events:none}
.pres-bar button{flex:none;display:grid;place-items:center;min-width:40px;height:40px;padding:0 8px;border:0;border-radius:12px;background:transparent;color:#fff;font:700 .9rem var(--font);cursor:pointer;gap:6px;grid-auto-flow:column}
.pres-bar button:hover{background:rgba(255,255,255,.12)}
.pres-bar button[aria-pressed="true"]{background:#fff;color:var(--ink)}
.pres-bar .sep{width:1px;height:26px;background:rgba(255,255,255,.18);margin:0 4px;flex:none}
.pres-bar .count{font:700 .9rem var(--font);min-width:78px;text-align:center;color:rgba(255,255,255,.8);font-variant-numeric:tabular-nums}
.pres-bar .dot{width:18px;height:18px;border-radius:50%;border:2px solid rgba(255,255,255,.5)}
.pres-bar .icon,.pres-bar svg{width:20px;height:20px}
.pres-title{position:fixed;top:14px;left:18px;z-index:20;font:600 .92rem var(--font);color:rgba(255,255,255,.7);transition:opacity .3s;max-width:60vw;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pres.idle .pres-title{opacity:0}
.pres-close{position:fixed;top:10px;right:10px;z-index:21;width:44px;height:44px;border:0;border-radius:12px;background:rgba(23,19,31,.7);color:#fff;cursor:pointer;display:grid;place-items:center;transition:opacity .3s}
.pres.idle .pres-close{opacity:0}
.pres-timer{position:fixed;top:12px;right:64px;z-index:20;padding:6px 12px;border-radius:10px;background:rgba(23,19,31,.8);font:700 1.05rem var(--font);font-variant-numeric:tabular-nums}
.pres-panel{position:fixed;inset:0;z-index:30;background:rgba(7,6,10,.94);overflow:auto;padding:70px 28px 110px}
.pres-panel h2{color:#fff;font-size:1.3rem;margin:0 0 16px}
.pres-panel-close{position:fixed;top:14px;right:14px}
.overview{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px;list-style:none;padding:0;margin:0}
.overview-group{grid-column:1/-1;font:700 .95rem var(--font);color:rgba(255,255,255,.7);margin-top:10px}
.overview button{display:block;width:100%;padding:0;border:2px solid transparent;border-radius:10px;background:none;cursor:pointer;text-align:left;color:#fff}
.overview button[aria-current="true"]{border-color:var(--orange)}
.overview button:hover{border-color:rgba(255,255,255,.5)}
.overview .thumb{position:relative;aspect-ratio:16/9;border-radius:8px;overflow:hidden;background:#fff;pointer-events:none}
.overview .thumb .slide-frame{position:absolute;inset:0;aspect-ratio:auto;height:100%}
.overview .label{display:block;padding:6px 2px 0;font-size:.82rem;color:rgba(255,255,255,.75);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pres-help table{border-collapse:collapse;color:#fff;max-width:640px}
.pres-help td{padding:8px 14px;border-bottom:1px solid rgba(255,255,255,.12)}
.pres-help kbd{color:var(--ink)}
.pres-settings{display:grid;gap:16px;max-width:520px;color:#fff}
.pres-settings label{display:grid;gap:6px;font-weight:600}
.pres-settings select{max-width:320px;color:var(--ink)}
.pres-zoom{position:absolute;inset:0;z-index:7;background:rgba(255,255,255,.98);display:grid;place-items:center;padding:3cqw}
.pres-zoom img{max-width:100%;max-height:100%;object-fit:contain}
.pres-notes{position:fixed;left:18px;bottom:84px;z-index:19;max-width:min(520px,calc(100vw - 36px));padding:14px 16px;border-radius:14px;background:rgba(255,241,220,.97);color:var(--ink);font-size:1rem;box-shadow:0 10px 30px rgba(0,0,0,.4);white-space:pre-wrap}
.pres-loading{color:#fff;font:600 1.1rem var(--font)}
.pres-toast{position:fixed;top:18px;left:50%;transform:translateX(-50%);z-index:40;padding:10px 16px;border-radius:12px;background:#fff;color:var(--ink);font-weight:700;box-shadow:0 10px 30px rgba(0,0,0,.4)}
@media (hover:none){.pres.idle .pres-bar{opacity:1;transform:translateX(-50%);pointer-events:auto}}

/* presenter window */
body.presenter{background:#0E0C12;color:#fff;margin:0;height:100vh;display:grid;grid-template-columns:1.4fr 1fr;grid-template-rows:auto 1fr auto;gap:16px;padding:16px;font-family:var(--font)}
.presenter header{grid-column:1/-1;display:flex;justify-content:space-between;align-items:center}
.presenter .clock{font:800 2.4rem var(--font);font-variant-numeric:tabular-nums}
.presenter .p-current,.presenter .p-next{position:relative;background:#fff;border-radius:10px;overflow:hidden;aspect-ratio:16/9}
.presenter .p-current .slide-frame,.presenter .p-next .slide-frame{position:absolute;inset:0;aspect-ratio:auto;height:100%}
.presenter aside{display:grid;grid-template-rows:auto auto 1fr;gap:12px;min-height:0}
.presenter .p-notes{background:#1C1826;border-radius:10px;padding:14px;overflow:auto;font-size:1.25rem;line-height:1.45;white-space:pre-wrap;min-height:0}
.presenter .p-controls{grid-column:1/-1;display:flex;gap:10px;justify-content:center}
.presenter .p-controls button{min-width:120px;height:56px;border-radius:14px;border:0;background:#fff;color:var(--ink);font:800 1.05rem var(--font);cursor:pointer}

/* ------------------------------------------------------------ misc */
.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);z-index:900;padding:12px 18px;border-radius:14px;background:var(--ink);color:#fff;font-weight:600;box-shadow:var(--shadow-lg);max-width:calc(100vw - 32px)}
.center-page{text-align:center;padding-top:40px}
.center-page .lead{margin-inline:auto}
.zoom-dialog{border:0;padding:0;border-radius:20px;max-width:min(92vw,900px);box-shadow:var(--shadow-lg)}
.zoom-dialog::backdrop{background:rgba(7,6,10,.7)}
.zoom-dialog img{display:block;width:100%;max-height:82vh;object-fit:contain;padding:28px;background:#fff}
.zoom-dialog button{position:absolute;top:10px;right:10px}

.footer{margin-top:40px;background:var(--paper-2);border-top:1px solid var(--line)}
.footer-inner{width:min(1180px,100% - 32px);margin:0 auto;padding:40px 0 20px;display:grid;grid-template-columns:1.2fr 1fr;gap:32px}
.footer-brand p{color:var(--ink-2);font-size:.93rem;max-width:52ch}
.footer-links{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:8px 20px;align-content:start}
.footer-links a{color:var(--ink-2);text-decoration:none;font-weight:600;font-size:.93rem}
.footer-links a:hover{color:var(--violet);text-decoration:underline}
.footer-note{width:min(1180px,100% - 32px);margin:0 auto;padding:0 0 28px;font-size:.8rem;color:var(--ink-3)}
@media (max-width:760px){.footer-inner{grid-template-columns:1fr}}

@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;scroll-behavior:auto !important}}

@media print{
  .topbar,.footer,.no-print,.crumbs,.toast,.skip{display:none !important}
  body{font-size:11.5pt;color:#000}
  .wrap{width:auto;padding:0}
  .print-doc{border:0;padding:0;margin:0}
  .print-break{break-after:page}
  a{color:#000;text-decoration:none}
}

/* ------------------------------------------------------------ old-Aula content */
.course-chip{display:inline-block;padding:.12em .55em;border-radius:7px;background:var(--course,var(--violet));color:#fff;font:800 .78rem/1.3 var(--font);letter-spacing:.02em;vertical-align:.08em;text-transform:none}
.course-card{border-top:6px solid var(--course,var(--violet))}
.course-card .course-badge{background:var(--course,var(--violet))}
.course-tagline{color:var(--ink-2);font-size:.95rem}
.archive{margin-top:22px;padding:14px 18px;border:1px dashed var(--line-2);border-radius:var(--radius)}
.archive summary{cursor:pointer;font-weight:700;color:var(--ink-2)}
.archive ul{margin:10px 0 0;display:grid;gap:6px}
.archive small{color:var(--ink-3)}
.hero-slide-label{color:rgba(255,255,255,.7);font:600 .82rem var(--font);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}
.slide-image{padding:0;background:#000;display:grid;place-items:center}
.slide-img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;display:block;-webkit-user-drag:none}
.slide-image .slide-actions{position:absolute;right:2cqw;bottom:2cqw;display:flex;gap:1cqw;z-index:5}
.slide-image .slide-actions button{font:700 1.3cqw var(--font);padding:.8cqw 1.4cqw;border-radius:99px;border:0;background:rgba(23,19,31,.85);color:#fff;cursor:pointer}
.slide-video{position:absolute;inset:0;z-index:6;background:#000}
.slide-video iframe{width:100%;height:100%;border:0}
.slide-text-only{justify-content:center}
.slide-text-only .slide-body{font-size:2.6cqw}
.topic-grid{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.topic-card{position:relative}
.topic-link{display:flex;flex-direction:column;height:100%;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;color:var(--ink);text-decoration:none;transition:border-color .15s,box-shadow .15s}
.topic-link:hover{border-color:var(--course,var(--violet));box-shadow:var(--shadow);color:var(--ink)}
.topic-thumb{position:relative;display:block;aspect-ratio:16/9;background:var(--paper-3)}
.topic-thumb img{width:100%;height:100%;object-fit:cover;display:block}
.topic-count{position:absolute;left:8px;bottom:8px;padding:3px 8px;border-radius:99px;background:rgba(23,19,31,.8);color:#fff;font:700 .78rem var(--font)}
.topic-text{display:grid;gap:2px;padding:12px 14px 14px}
.topic-text strong{font-size:1rem;line-height:1.3}
.topic-text small{color:var(--ink-3)}
.topic-index{font:800 .8rem var(--font);color:var(--course,var(--violet))}
.topic-play{position:absolute;top:10px;right:10px;width:46px;height:46px;border-radius:50%;border:0;background:var(--violet);color:#fff;display:grid;place-items:center;cursor:pointer;box-shadow:0 4px 14px rgba(23,19,31,.3);opacity:.92}
.topic-play:hover{opacity:1;transform:scale(1.05)}
.topic-play .icon{width:22px;height:22px}
.topic-head h1{max-width:30ch}
.slide-grid-list{list-style:none;padding:0;margin:8px 0 0;display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.slide-thumb{position:relative;display:block;width:100%;padding:0;border:2px solid transparent;border-radius:12px;overflow:hidden;background:var(--paper-3);cursor:pointer;aspect-ratio:16/9}
.slide-thumb:hover{border-color:var(--violet);box-shadow:var(--shadow-lg)}
.slide-thumb img{width:100%;height:100%;object-fit:contain;display:block;background:#000}
.slide-thumb-text{display:block;padding:14px;font-size:.85rem;text-align:left;color:var(--ink-2)}
.slide-thumb-n{position:absolute;top:6px;left:6px;min-width:26px;height:26px;padding:0 6px;border-radius:99px;background:rgba(23,19,31,.85);color:#fff;font:800 .8rem/26px var(--font)}
.slide-thumb-badge,.slide-thumb-q{position:absolute;bottom:6px;padding:2px 8px;border-radius:99px;font:700 .72rem var(--font)}
.slide-thumb-badge{left:6px;background:var(--orange);color:var(--ink)}
.slide-thumb-q{right:6px;background:rgba(255,255,255,.92);color:var(--ink)}
.teacher-questions{margin-top:44px}
.q-group{margin:18px 0}
.q-group-title{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--ink-2);margin:0 0 8px}
.q-group-title img{border-radius:4px}
.q-list{list-style:none;padding:0;margin:0;display:grid;gap:6px}
.q-list li{display:flex;gap:12px;align-items:baseline;padding:10px 14px;border:1px solid var(--line);border-radius:12px;background:#fff}
.answer-tag{flex:none;min-width:2em;text-align:center;visibility:hidden}
.show-answers .answer-tag{visibility:visible}
.hide-dialog{max-width:min(96vw,1100px)}
.hide-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px;padding:14px 18px;max-height:65vh;overflow:auto}
.hide-cell{position:relative;display:block;border-radius:10px;overflow:hidden;border:3px solid var(--violet);cursor:pointer;aspect-ratio:16/9;background:var(--paper-3)}
.hide-cell:has(input:not(:checked)){border-color:var(--line-2);opacity:.45}
.hide-cell input{position:absolute;top:8px;left:8px;width:20px;height:20px;accent-color:var(--violet)}
.hide-cell img{width:100%;height:100%;object-fit:cover;display:block}
.hide-cell span{display:block;padding:10px;font-size:.8rem}
.hide-cell b{position:absolute;right:6px;bottom:6px;background:rgba(23,19,31,.85);color:#fff;border-radius:99px;padding:0 7px;font-size:.78rem}
.slide-lab{background:#fff}
.slide-lab .lab-out{position:absolute;left:50%;bottom:1.2cqw;transform:translateX(-50%);padding:.6cqw 1.2cqw;border-radius:99px;background:rgba(23,19,31,.85);color:#fff;font:600 1.1cqw var(--font);text-decoration:none}