:root{--bg:#05070d;--panel:#0b1020;--panel2:#11182b;--ink:#f5f7ff;--muted:#a6b0c5;--faint:#657089;--cyan:#22d3ee;--magenta:#f71ea2;--violet:#8b5cf6;--line:rgba(166,176,197,.18);--accent:var(--cyan);--accent2:var(--magenta);--sans:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--display:"Space Grotesk",Inter,sans-serif;--mono:"Space Mono",ui-monospace,monospace}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 12% 0,rgba(34,211,238,.09),transparent 32rem),radial-gradient(circle at 92% 18%,rgba(247,30,162,.08),transparent 30rem),var(--bg);color:var(--ink);font-family:var(--sans);line-height:1.65}a{color:inherit}button,input,select,textarea{font:inherit}.skip{position:fixed;left:1rem;top:-5rem;z-index:999;background:#fff;color:#000;padding:.7rem 1rem}.skip:focus{top:1rem}.top{position:sticky;top:0;z-index:80;background:rgba(5,7,13,.88);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.topin{max-width:1180px;margin:auto;min-height:68px;padding:0 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{text-decoration:none;font-family:var(--display);font-weight:800}.brand em{font-style:normal;color:var(--cyan)}.top nav{display:flex;gap:20px;align-items:center}.top nav a{text-decoration:none;color:var(--muted);font-size:.86rem}.top nav a:hover,.top nav a:focus-visible{color:var(--ink)}.join{border:1px solid rgba(247,30,162,.5);border-radius:999px;padding:.55rem 1rem;color:var(--ink)!important}.progress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--cyan),var(--violet),var(--magenta));z-index:100}.wrap{width:min(1120px,calc(100% - 40px));margin:auto}.hero{min-height:76vh;display:grid;align-items:center;padding:86px 0 64px;overflow:hidden}.eyebrow{font:700 .72rem var(--mono);letter-spacing:.19em;text-transform:uppercase;color:var(--accent);margin:0 0 1rem}.hero h1,.scene h2{font-family:var(--display);line-height:.98;letter-spacing:-.045em;margin:.15em 0}.hero h1{font-size:clamp(3rem,8vw,6.8rem);max-width:1000px}.gradient{background:linear-gradient(90deg,var(--cyan),#fff 42%,var(--magenta));-webkit-background-clip:text;background-clip:text;color:transparent}.lead{font-size:clamp(1.08rem,2.2vw,1.4rem);color:var(--muted);max-width:760px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 20px;border-radius:12px;text-decoration:none;border:1px solid var(--line);font-weight:800;cursor:pointer}.btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#05070d;border:0}.btn:hover{transform:translateY(-2px)}.facts{display:flex;gap:10px;flex-wrap:wrap;margin-top:34px}.facts span{border:1px solid var(--line);background:rgba(11,16,32,.72);border-radius:999px;padding:8px 13px;color:var(--muted);font-size:.84rem}.scene{padding:90px 0;border-top:1px solid var(--line);position:relative;content-visibility:auto;contain-intrinsic-size:800px}.scene h2{font-size:clamp(2.2rem,5vw,4.6rem);max-width:880px}.sub{color:var(--muted);font-size:1.05rem;max-width:800px}.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:18px;margin-top:36px}.panel{grid-column:span 4;border:1px solid var(--line);border-radius:20px;padding:24px;background:linear-gradient(145deg,rgba(17,24,43,.92),rgba(7,10,19,.82));box-shadow:0 24px 70px rgba(0,0,0,.25)}.panel.wide{grid-column:span 8}.panel.full{grid-column:1/-1}.panel h3{font-family:var(--display);margin:.2rem 0 .55rem;font-size:1.35rem}.panel p,.panel li{color:var(--muted)}.n{font:700 .68rem var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}.schedule{display:grid;gap:14px;margin-top:34px}.session{display:grid;grid-template-columns:120px 1fr auto;gap:22px;align-items:center;padding:20px 22px;border:1px solid var(--line);border-radius:16px;background:rgba(11,16,32,.76);text-decoration:none}.session time{font:700 .75rem var(--mono);color:var(--accent);text-transform:uppercase}.session h3{margin:0;font-family:var(--display)}.session p{margin:.25rem 0 0;color:var(--muted)}.session .state{font:.7rem var(--mono);text-transform:uppercase;color:var(--faint)}.session:hover{border-color:var(--accent)}.method{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin-top:32px}.method div{min-height:140px;padding:18px;border:1px solid var(--line);border-radius:14px;background:var(--panel)}.method b{display:block;color:var(--accent);font-family:var(--display);font-size:1.15rem}.artifact{border:1px solid color-mix(in srgb,var(--accent) 48%,transparent);border-radius:24px;padding:clamp(24px,5vw,54px);background:linear-gradient(140deg,color-mix(in srgb,var(--accent) 10%,transparent),rgba(11,16,32,.85));margin-top:34px}.artifact pre{white-space:pre-wrap;overflow:auto;background:#03050a;border-radius:14px;padding:18px;color:#d7faff;font:400 .84rem/1.65 var(--mono)}.tree,.loop,.matrix,.recipe,.control{display:grid;gap:10px;margin-top:28px}.tree button,.recipe button,.loop button,.matrix button,.control button{border:1px solid var(--line);border-radius:12px;background:var(--panel);color:var(--ink);padding:15px;text-align:left;cursor:pointer}.tree button[aria-pressed="true"],.recipe button[aria-pressed="true"],.loop button[aria-pressed="true"],.matrix button[aria-pressed="true"],.control button[aria-pressed="true"]{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,var(--panel))}.output{margin-top:16px;min-height:110px;border-left:4px solid var(--accent);background:rgba(11,16,32,.88);padding:18px 20px;color:var(--muted)}.output strong{color:var(--ink)}.rail{position:fixed;right:16px;top:50%;transform:translateY(-50%);z-index:60;display:none;gap:7px;flex-direction:column}.rail a{width:11px;height:11px;border-radius:50%;background:var(--faint);border:2px solid var(--bg)}.rail a.active{background:var(--accent);transform:scale(1.25)}.present-toggle{position:fixed;right:18px;bottom:18px;z-index:90;border:1px solid var(--line);border-radius:999px;background:rgba(5,7,13,.92);color:var(--ink);padding:10px 15px;cursor:pointer}.present-note{position:fixed;left:18px;bottom:18px;z-index:90;color:var(--faint);font:.67rem var(--mono);display:none}body.presenting{overflow:hidden}body.presenting .top,body.presenting footer{display:none}body.presenting .scene,body.presenting .hero{display:none;content-visibility:visible}body.presenting [data-slide].active{display:grid;align-items:center;min-height:100vh;max-height:100vh;overflow-y:auto;padding:42px 0}body.presenting .rail{display:flex}body.presenting .present-note{display:block}body.presenting .scene h2{font-size:clamp(2.4rem,5vw,5rem)}body.presenting .sub{font-size:1.12rem}body.presenting .secondary{display:none}.footer{padding:50px 0;border-top:1px solid var(--line);color:var(--muted)}.footerin{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}.source-list li{margin:.65rem 0;color:var(--muted)}.source-list a{color:var(--cyan)}
@media(min-width:1000px){.rail{display:flex}}@media(max-width:800px){.top nav a:not(.join){display:none}.hero{min-height:auto;padding-top:62px}.panel,.panel.wide{grid-column:1/-1}.session{grid-template-columns:1fr}.method{grid-template-columns:1fr 1fr}.scene{padding:68px 0}.hero h1{font-size:clamp(2.8rem,14vw,5rem)}}@media(max-width:480px){.wrap{width:min(100% - 28px,1120px)}.method{grid-template-columns:1fr}.actions .btn{width:100%}.facts{display:grid}.hero h1{font-size:2.7rem}.present-toggle{right:10px;bottom:10px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important;scroll-behavior:auto!important}.btn:hover{transform:none}}

/* Course v2: registration and classroom are deliberately separate surfaces. */
.hero-grid{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(300px,.55fr);gap:clamp(28px,6vw,76px);align-items:center}.hero-copy h1{font-size:clamp(3rem,7vw,6.4rem)}.hero-side{border:1px solid color-mix(in srgb,var(--accent) 42%,var(--line));border-radius:24px;padding:26px;background:linear-gradient(150deg,color-mix(in srgb,var(--accent) 10%,transparent),rgba(5,7,13,.94));box-shadow:0 32px 90px rgba(0,0,0,.42)}.hero-side h2{font:800 1.7rem/1.05 var(--display);margin:.4rem 0 1rem}.hero-side p{color:var(--muted)}.hero-side .btn{width:100%;margin-top:10px}.time-primary{display:block;color:var(--ink);font:800 1.1rem/1.3 var(--display);margin:.35rem 0}.time-reference{display:block;color:var(--muted);font:.72rem/1.5 var(--mono)}.time-note{margin-top:14px;padding-top:14px;border-top:1px solid var(--line);font-size:.78rem!important}.status-pill{display:inline-flex;align-items:center;gap:8px;border:1px solid color-mix(in srgb,var(--accent) 45%,transparent);border-radius:999px;padding:7px 11px;color:var(--accent);font:700 .67rem var(--mono);letter-spacing:.09em;text-transform:uppercase}.status-pill::before{content:"";width:7px;height:7px;border-radius:50%;background:currentColor;box-shadow:0 0 14px currentColor}.mini-nav{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}.mini-nav a{color:var(--muted);font:.74rem var(--mono)}
.session{position:relative;overflow:hidden}.session::before{content:"";position:absolute;inset:0 auto 0 0;width:3px;background:var(--accent);opacity:.3}.session.done{opacity:.84}.session.upcoming{border-color:color-mix(in srgb,var(--accent) 42%,var(--line));background:linear-gradient(110deg,color-mix(in srgb,var(--accent) 8%,transparent),rgba(11,16,32,.82))}.session .session-actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}.session .session-actions a{border:1px solid var(--line);border-radius:999px;padding:7px 10px;font:.65rem var(--mono);color:var(--muted);text-decoration:none}.session .session-actions a:hover,.session .session-actions a:focus-visible{color:var(--ink);border-color:var(--accent)}.session .session-actions .hot{color:var(--accent);border-color:color-mix(in srgb,var(--accent) 45%,transparent)}
.outcome-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:34px}.outcome{border-top:2px solid var(--accent);padding:18px;background:rgba(11,16,32,.72)}.outcome b{display:block;font-family:var(--display);font-size:1.05rem}.outcome span{display:block;color:var(--muted);font-size:.88rem;margin-top:7px}
.teacher{display:grid;grid-template-columns:minmax(260px,.7fr) minmax(0,1.3fr);gap:clamp(26px,6vw,70px);align-items:center}.teacher-media{position:relative;min-height:470px;border-radius:28px;overflow:hidden;border:1px solid var(--line);background:var(--panel)}.teacher-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center top}.teacher-media::after{content:"";position:absolute;inset:auto 0 0;height:42%;background:linear-gradient(transparent,var(--bg))}.teacher-copy h2{max-width:720px}.teacher-copy blockquote{margin:28px 0 0;padding:0 0 0 22px;border-left:3px solid var(--accent);font:600 clamp(1.1rem,2.4vw,1.45rem)/1.55 var(--display);color:var(--ink)}.teacher-proof{display:flex;gap:9px;flex-wrap:wrap;margin-top:22px}.teacher-proof span{border:1px solid var(--line);border-radius:999px;padding:7px 11px;color:var(--muted);font-size:.78rem}
.course-architecture{display:grid;grid-template-columns:1fr auto 1fr;gap:18px;align-items:stretch;margin-top:36px}.architecture-card{border:1px solid var(--line);border-radius:22px;padding:28px;background:var(--panel)}.architecture-card h3{font:800 1.5rem var(--display);margin:.25rem 0}.architecture-card ul{padding-left:20px;color:var(--muted)}.architecture-arrow{align-self:center;color:var(--accent);font:800 2rem var(--mono)}
.cta-band{border:1px solid color-mix(in srgb,var(--accent) 50%,transparent);border-radius:26px;padding:clamp(26px,5vw,54px);display:flex;justify-content:space-between;align-items:center;gap:28px;background:linear-gradient(125deg,color-mix(in srgb,var(--accent) 13%,transparent),rgba(11,16,32,.86))}.cta-band h2{font-size:clamp(2rem,4vw,3.4rem);margin:0}.cta-band p{color:var(--muted);max-width:650px}.cta-band .actions{margin:0;flex:0 0 auto}
.diagram{display:grid;gap:12px;margin-top:30px}.diagram-row{display:grid;grid-template-columns:150px 1fr auto;gap:18px;align-items:center;border:1px solid var(--line);border-radius:16px;padding:17px;background:rgba(11,16,32,.72)}.diagram-row b{font-family:var(--display)}.diagram-row p{margin:0;color:var(--muted)}.diagram-row em{font:700 .68rem var(--mono);color:var(--accent);font-style:normal;text-transform:uppercase}.callout{border-left:4px solid var(--accent);padding:20px 22px;background:color-mix(in srgb,var(--accent) 8%,var(--panel));margin-top:24px;color:var(--muted)}.callout strong{color:var(--ink)}.comparison{width:100%;border-collapse:collapse;margin-top:28px;background:rgba(11,16,32,.7);border:1px solid var(--line)}.comparison th,.comparison td{text-align:left;vertical-align:top;padding:16px;border-bottom:1px solid var(--line)}.comparison th{font:.72rem var(--mono);text-transform:uppercase;color:var(--accent)}.comparison td{color:var(--muted)}.comparison td strong{color:var(--ink)}.flowline{display:flex;gap:8px;align-items:stretch;margin-top:30px;overflow-x:auto;padding-bottom:8px}.flow-step{min-width:170px;flex:1;border:1px solid var(--line);border-radius:15px;padding:17px;background:var(--panel)}.flow-step b{display:block;font-family:var(--display)}.flow-step span{display:block;color:var(--muted);font-size:.84rem;margin-top:6px}.flow-arrow{align-self:center;color:var(--accent)}
.registration-hero{padding:76px 0}.registration-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(340px,.72fr);gap:clamp(28px,6vw,72px);align-items:start}.registration-copy h1{font:800 clamp(2.8rem,6vw,5.3rem)/1 var(--display);letter-spacing:-.045em;margin:.2em 0}.registration-form{position:sticky;top:92px;border:1px solid color-mix(in srgb,var(--accent) 45%,var(--line));border-radius:24px;padding:26px;background:rgba(11,16,32,.96);box-shadow:0 32px 90px rgba(0,0,0,.38)}.registration-form h2{font:800 1.55rem/1.1 var(--display);margin:.2rem 0}.form-field{display:grid;gap:7px;margin-top:16px}.form-field label{font:700 .78rem var(--mono);color:var(--muted)}.form-field input,.form-field select,.form-field textarea{width:100%;border:1px solid var(--line);border-radius:12px;background:#070a12;color:var(--ink);padding:13px 14px;outline:none}.form-field input:focus,.form-field select:focus,.form-field textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 15%,transparent)}.form-field input:user-invalid{border-color:var(--magenta)}.check-field{display:grid;grid-template-columns:auto 1fr;gap:10px;align-items:start;margin-top:16px;color:var(--muted);font-size:.82rem}.check-field input{margin-top:4px;accent-color:var(--accent)}.registration-form .btn{width:100%;margin-top:20px}.form-status{min-height:48px;margin:14px 0 0;padding:10px 12px;border-radius:10px;color:var(--muted);font-size:.82rem}.form-status.is-success{background:rgba(34,197,94,.1);color:#b7f7c7}.form-status.is-error{background:rgba(247,30,162,.1);color:#ffc4e5}.privacy-note{color:var(--faint);font-size:.72rem;line-height:1.5}.class-agenda{counter-reset:agenda;display:grid;gap:11px;margin-top:28px}.agenda-item{counter-increment:agenda;display:grid;grid-template-columns:42px 1fr;gap:14px;padding:16px;border:1px solid var(--line);border-radius:14px;background:rgba(11,16,32,.68)}.agenda-item::before{content:counter(agenda,decimal-leading-zero);font:700 .72rem var(--mono);color:var(--accent);padding-top:4px}.agenda-item b{display:block;font-family:var(--display)}.agenda-item span{color:var(--muted);font-size:.9rem}.legacy-note{font-size:.72rem;color:var(--faint)}
@media(max-width:900px){.hero-grid,.teacher,.registration-layout{grid-template-columns:1fr}.hero-side{max-width:620px}.teacher-media{min-height:430px}.registration-form{position:static}.outcome-grid{grid-template-columns:1fr 1fr}.course-architecture{grid-template-columns:1fr}.architecture-arrow{transform:rotate(90deg);justify-self:center}.cta-band{align-items:flex-start;flex-direction:column}.cta-band .actions{width:100%}.diagram-row{grid-template-columns:1fr}.session .session-actions{justify-content:flex-start}}
@media(max-width:560px){.outcome-grid{grid-template-columns:1fr}.teacher-media{min-height:390px}.comparison{display:block;overflow-x:auto}.flowline{gap:5px}.registration-form{padding:20px}.hero-side{padding:20px}}
@media(max-width:560px){.registration-copy,.registration-form{min-width:0}.registration-copy h1{font-size:clamp(2.25rem,12vw,3rem);overflow-wrap:anywhere}.registration-copy h2,.registration-copy .gradient{overflow-wrap:anywhere}}
.calendar-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}.calendar-link{display:inline-flex;align-items:center;min-height:38px;padding:7px 11px;border:1px solid var(--line);border-radius:999px;color:var(--muted);font:700 .68rem var(--mono);text-decoration:none}.calendar-link:hover,.calendar-link:focus-visible{border-color:var(--accent);color:var(--ink)}
.storyline{list-style:none;margin:36px 0 0;padding:0;display:grid;grid-template-columns:repeat(5,1fr);gap:10px;position:relative}.storyline::before{content:"";position:absolute;left:7%;right:7%;top:28px;height:2px;background:linear-gradient(90deg,var(--cyan),var(--violet),var(--magenta));opacity:.55}.storyline li{position:relative;min-height:190px;padding:16px;border:1px solid var(--line);border-radius:18px;background:linear-gradient(180deg,rgba(17,24,43,.93),rgba(5,7,13,.9))}.storyline li span{position:relative;z-index:1;display:grid;place-items:center;width:28px;height:28px;border:2px solid var(--accent);border-radius:50%;background:var(--bg);color:var(--accent);font:700 .64rem var(--mono);box-shadow:0 0 22px color-mix(in srgb,var(--accent) 30%,transparent)}.storyline li b{display:block;margin-top:22px;font:800 1.12rem var(--display)}.storyline li em{display:block;margin-top:7px;color:var(--muted);font-style:normal;font-size:.84rem;line-height:1.45}
:where(a:any-link,button,input,select,textarea):focus-visible{outline:3px solid var(--accent);outline-offset:3px}
@media(max-width:900px){.storyline{grid-template-columns:1fr 1fr}.storyline::before{display:none}}
@media(max-width:560px){.storyline{grid-template-columns:1fr}.storyline li{min-height:0}}
body.presenting .storyline{margin-top:12px;gap:6px}body.presenting .storyline li{min-height:108px;padding:10px}body.presenting .storyline li b{margin-top:8px}body.presenting .storyline li em{font-size:.65rem}

/* Camera mode: one dominant idea per scene; reading mode keeps the full explanation. */
body.presenting [data-slide].active{height:100vh;min-height:100vh;max-height:100vh;overflow:hidden;padding:14px 0;font-size:.82rem;line-height:1.35}
body.presenting [data-slide].active>.wrap{width:min(1180px,calc(100% - 30px))}
body.presenting .hero-grid{grid-template-columns:1fr}
body.presenting .hero-side,body.presenting .actions,body.presenting .facts,body.presenting .secondary{display:none!important}
body.presenting .hero h1{font-size:clamp(2.8rem,6.5vw,5rem);max-width:1080px}
body.presenting .scene h2{font-size:clamp(2rem,4vw,3.45rem);max-width:1040px}
body.presenting .eyebrow{margin-bottom:.35rem;font-size:.62rem}
body.presenting .lead,body.presenting .sub{font-size:.92rem;line-height:1.4;margin:.55rem 0;max-width:960px}
body.presenting .grid{margin-top:12px;gap:7px}
body.presenting .panel{padding:10px 12px;border-radius:12px;box-shadow:none}
body.presenting .panel h3{font-size:1rem;margin:0}
body.presenting .panel p,body.presenting .panel li{display:none}
body.presenting .outcome-grid{margin-top:12px;gap:7px}
body.presenting .outcome{padding:10px}
body.presenting .outcome span{font-size:.72rem;margin-top:3px}
body.presenting .artifact{margin-top:10px;padding:14px 18px;border-radius:15px}
body.presenting .artifact h3{margin:.2rem 0;font-size:1.05rem}
body.presenting .artifact p{margin:.25rem 0;font-size:.75rem}
body.presenting .artifact pre{margin:.35rem 0 0;padding:10px;font-size:.64rem;line-height:1.25;max-height:300px}
body.presenting .diagram{margin-top:12px;gap:6px}
body.presenting .diagram-row{grid-template-columns:135px 1fr auto;padding:8px 10px;gap:10px;border-radius:10px}
body.presenting .diagram-row p{font-size:.72rem;line-height:1.25}
body.presenting .comparison{margin-top:12px;font-size:.7rem;line-height:1.25}
body.presenting .comparison th,body.presenting .comparison td{padding:7px 8px}
body.presenting .callout{margin-top:10px;padding:9px 12px;font-size:.73rem;line-height:1.3}
body.presenting .flowline{margin-top:12px;gap:5px}
body.presenting .flow-step{min-width:120px;padding:9px;border-radius:10px}
body.presenting .flow-step span{font-size:.68rem;margin-top:3px}
body.presenting .recipe,body.presenting .control,body.presenting .matrix,body.presenting .loop{margin-top:10px;gap:6px}
body.presenting .recipe button,body.presenting .control button,body.presenting .matrix button,body.presenting .loop button{padding:8px 10px;font-size:.72rem}
body.presenting .output{margin-top:8px;min-height:54px;padding:8px 11px;font-size:.72rem}
body.presenting .class-agenda{margin-top:10px;gap:5px}
body.presenting .agenda-item{grid-template-columns:30px 1fr;padding:7px 9px;gap:8px}
body.presenting .agenda-item span{display:none}
body.presenting .source-list{font-size:.75rem;line-height:1.25;margin:.5rem 0}
body.presenting .source-list li{margin:.25rem 0}
body.presenting .cta-band{padding:18px;gap:14px}
body.presenting .cta-band h2{font-size:2.4rem}

/* Responsive presentation contract v2: scrollable scenes, touch controls and safe areas. */
:root{
  --course-safe-top:env(safe-area-inset-top,0px);
  --course-safe-right:env(safe-area-inset-right,0px);
  --course-safe-bottom:env(safe-area-inset-bottom,0px);
  --course-safe-left:env(safe-area-inset-left,0px);
  --course-touch-size:44px;
}
html{scroll-padding-bottom:calc(84px + var(--course-safe-bottom))}
.present-toggle{min-height:var(--course-touch-size);touch-action:manipulation}
.course-presentation-controls{
  position:fixed;
  right:max(18px,var(--course-safe-right));
  bottom:calc(18px + var(--course-safe-bottom));
  z-index:90;
  display:flex;
  align-items:center;
  gap:5px;
  padding:5px;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(5,7,13,.94);
  box-shadow:0 14px 44px rgba(0,0,0,.38);
  backdrop-filter:blur(14px);
}
.course-presentation-controls .present-toggle{position:static;padding:9px 14px;border-color:transparent;background:transparent}
.course-presentation-controls:not(.is-presenting) .present-toggle{padding-inline:10px;font-size:.8rem}
.course-presentation-controls>button{
  min-width:var(--course-touch-size);
  min-height:var(--course-touch-size);
  border:1px solid transparent;
  border-radius:999px;
  background:transparent;
  color:var(--ink);
  font:700 1rem var(--mono);
  cursor:pointer;
  touch-action:manipulation;
}
.course-presentation-controls>button:hover,.course-presentation-controls>button:focus-visible{border-color:var(--accent);color:#fff}
.course-presentation-controls>button:disabled{opacity:.34;cursor:not-allowed}
.course-present-previous,.course-present-next,.course-present-counter{display:none}
.course-present-counter{min-width:58px;text-align:center;color:var(--muted);font:700 .7rem var(--mono);letter-spacing:.08em}
body.presenting .course-present-previous,body.presenting .course-present-next,body.presenting .course-present-counter{display:inline-grid;place-items:center}
#am-privacy-control{min-height:44px!important;padding-block:8px!important;touch-action:manipulation}
body.presenting [data-slide].active{
  height:100vh;
  height:100svh;
  height:100dvh;
  min-height:100vh;
  min-height:100svh;
  min-height:100dvh;
  max-height:100vh;
  max-height:100svh;
  max-height:100dvh;
  overflow-x:hidden;
  overflow-y:auto;
  overscroll-behavior:contain;
  scrollbar-gutter:stable;
  align-items:start;
  padding:calc(24px + var(--course-safe-top)) 0 calc(92px + var(--course-safe-bottom));
  scroll-padding-bottom:calc(92px + var(--course-safe-bottom));
}
body.presenting [data-slide].active:focus{outline:none}
body.presenting .present-note{left:max(18px,var(--course-safe-left));bottom:calc(76px + var(--course-safe-bottom))}

@media(min-width:900px) and (min-height:720px){
  body.presenting [data-slide].active{align-items:center}
}

@media(max-width:800px){
  .has-course-presentation-controls .top{padding-bottom:48px}
  .has-course-presentation-controls .course-presentation-controls:not(.is-presenting){
    position:absolute;
    top:calc(70px + var(--course-safe-top));
    right:max(14px,var(--course-safe-right));
    bottom:auto;
    padding:0;
  }
  .has-course-presentation-controls #am-privacy-control{
    position:absolute!important;
    top:calc(71px + var(--course-safe-top))!important;
    right:auto!important;
    bottom:auto!important;
    left:max(14px,var(--course-safe-left))!important;
    transform:none!important;
  }
  body.presenting.has-course-presentation-controls #am-privacy-control{display:none!important}
  .course-presentation-controls{
    right:max(10px,var(--course-safe-right));
    bottom:calc(10px + var(--course-safe-bottom));
  }
  body.presenting .course-presentation-controls{
    left:max(8px,var(--course-safe-left));
    right:max(8px,var(--course-safe-right));
    bottom:calc(58px + var(--course-safe-bottom));
    display:grid;
    grid-template-columns:var(--course-touch-size) minmax(52px,1fr) var(--course-touch-size) auto;
    width:auto;
    border-radius:18px;
  }
  body.presenting .course-presentation-controls .present-toggle{padding-inline:14px}
  body.presenting .present-note,body.presenting .rail{display:none}
  body.presenting [data-slide].active{
    font-size:1rem;
    line-height:1.5;
    padding:calc(22px + var(--course-safe-top)) 0 calc(132px + var(--course-safe-bottom));
    scroll-padding-bottom:calc(132px + var(--course-safe-bottom));
  }
  body.presenting [data-slide].active>.wrap{width:min(100% - 28px,1180px)}
  body.presenting .panel p,body.presenting .panel li{display:revert}
  body.presenting .agenda-item span{display:block}
  body.presenting .lead,body.presenting .sub{font-size:1rem;line-height:1.5}
  body.presenting .comparison{font-size:.82rem}
}

@media(max-width:480px){
  .course-presentation-controls{right:max(8px,var(--course-safe-right))}
  body.presenting .course-presentation-controls{grid-template-columns:44px minmax(48px,1fr) 44px auto}
  body.presenting .course-presentation-controls .present-toggle{font-size:.76rem;padding-inline:10px}
  body.presenting .scene h2{font-size:clamp(1.9rem,9vw,2.7rem)}
}

@media(orientation:landscape) and (max-height:520px){
  body.presenting .course-presentation-controls{
    left:auto;
    right:max(8px,var(--course-safe-right));
    bottom:calc(8px + var(--course-safe-bottom));
    display:flex;
    width:auto;
    border-radius:999px;
  }
  body.presenting [data-slide].active{padding-bottom:calc(76px + var(--course-safe-bottom));scroll-padding-bottom:calc(76px + var(--course-safe-bottom))}
}

@media(max-width:560px){
  .hero{padding:48px 0 42px}
  .hero h1,.hero-copy h1{font-size:clamp(2.35rem,11vw,3.05rem);overflow-wrap:anywhere}
  .scene h2{font-size:clamp(2rem,9vw,2.8rem);overflow-wrap:anywhere}
  .lead,.sub{font-size:1rem;line-height:1.55}
  .facts{margin-top:24px}
}

@media(max-width:800px){
  .topin{padding-left:max(14px,var(--course-safe-left));padding-right:max(14px,var(--course-safe-right))}
  .wrap{width:auto;margin-left:max(14px,var(--course-safe-left));margin-right:max(14px,var(--course-safe-right))}
}

@media(max-width:800px),(pointer:coarse){
  .btn,.recipe button,.control button,.matrix button,.loop button,.registration-form button,.present-toggle{min-height:var(--course-touch-size)}
  .brand,.top nav a,.join,.calendar-link,.mini-nav a{display:inline-flex;align-items:center;min-height:var(--course-touch-size)}
  .form-field input,.form-field select,.form-field textarea{font-size:1rem}
  .check-field{min-height:var(--course-touch-size);align-items:center}
  .check-field input{width:22px;height:22px;margin-top:0}
}

/* Aula interactiva: marca oficial compartida. */
.brand{display:inline-flex;align-items:center;gap:9px}.brand img{width:38px;height:30px;object-fit:contain;flex:0 0 auto;filter:drop-shadow(0 0 10px rgba(34,211,238,.32))}
@media(prefers-reduced-motion:reduce){
  .course-presentation-controls{backdrop-filter:none}
}

/* Pointer-fine baseline: primary CTAs stay touch-ready; secondary navigation stays at least 24px. */
.top nav a{display:inline-flex;align-items:center;justify-content:center;min-width:24px;min-height:24px}
.top nav .join,.join{min-height:44px}

/* Keep the standalone presentation trigger clear of the centered privacy control
   on the narrowest supported viewport. Presentation mode already uses its own
   full-width dock above that control. */
@media(max-width:340px){
  .course-presentation-controls:not(.is-presenting) .present-toggle{padding-inline:7px;font-size:.72rem}
}

/* A landscape phone is wider than the portrait breakpoint but still uses touch. */
@media(max-width:900px) and (max-height:520px){
  .top nav a{min-width:var(--course-touch-size);min-height:var(--course-touch-size)}
}

/* Prevent a sticky enrollment panel from being pushed above the viewport when
   its grid container ends. Sticky remains available on genuinely tall screens. */
@media(min-width:901px) and (max-height:1050px){
  .registration-form{position:static;top:auto}
}