/* kapitel/praesentation.css — Präsentationsmodus für Inhaltsseiten.
   Start-Knopf im Hero: <button type="button" class="praes-start" data-praes-start data-praes-nr="1.3.1">…</button>
   Logik in /assets/js/kapitel/praesentation.js (baut Folien aus den vorhandenen Phasen). */

/* ---------- Start-Knopf im Hero ---------- */
.praes-start{font-family:'Fredoka',Inter,sans-serif!important;display:inline-flex;align-items:center;gap:10px;margin-top:22px;padding:11px 20px 11px 16px;border-radius:999px;border:1.5px solid rgba(255,255,255,.55);background:rgba(255,255,255,.12);color:#fff;font:600 15px/1.2 'Fredoka',Inter,sans-serif;cursor:pointer;transition:background .15s,border-color .15s,transform .15s}
.praes-start svg{width:20px;height:20px;flex:0 0 20px}
.praes-start:hover{background:rgba(255,255,255,.22);border-color:#fff}
.praes-start:focus-visible{outline:3px solid #f4d03f;outline-offset:3px}
@media print{.praes-start{display:none}}

/* ---------- Overlay ---------- */
html.praes-offen,html.praes-offen body{overflow:hidden!important}
.praes{position:fixed;inset:0;z-index:10000;background:#1b1233;color:var(--ink,#2f2f2f);font-family:'Fredoka',Inter,sans-serif;-webkit-font-smoothing:antialiased}
.praes:focus{outline:none}
.praes-stage{position:absolute;left:50%;top:50%;width:1280px;height:720px;transform-origin:50% 50%;background:#faf6ee;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.45)}

/* ---------- Folie ---------- */
.praes-slide{position:absolute;inset:0;display:flex;flex-direction:column;visibility:hidden;pointer-events:none}
.praes-slide.aktiv{visibility:visible;pointer-events:auto}
/* inaktive Folien bleiben gelayoutet (visibility statt display), damit Canvas-Applets ihre Größe kennen */
.praes-head{flex:0 0 auto;background:var(--fach-ink,var(--physik-ink,#3d2a6b));color:#fff;padding:22px 56px 20px;border-radius:0}
.praes-kicker{display:block;font:600 13px/1 'Fredoka',Inter,sans-serif;letter-spacing:.16em;text-transform:uppercase;color:rgba(255,255,255,.72);margin-bottom:9px}
.praes-head h2{font-family:'Fredoka',sans-serif;font-weight:500;font-size:38px;line-height:1.12;margin:0;color:#fff}
.praes-body{position:relative;flex:1 1 auto;margin:30px 56px 44px;overflow:visible}
.praes-inhalt{position:absolute;left:0;top:0;transform-origin:0 0}

/* Inhalte größer als auf der Seite */
.praes-inhalt .erklaer-text{font-size:25px!important;line-height:1.55!important;margin:0 0 20px;color:var(--ink,#2f2f2f)}
.praes-inhalt .stichliste{margin:6px 0 26px;row-gap:16px}
.praes-inhalt .stichliste li,.praes-inhalt .stichliste.aligned .st-term,.praes-inhalt .stichliste.aligned .st-text,.praes-inhalt .stichliste.aligned li.plain{font-size:25px!important;line-height:1.5!important}
.praes-inhalt .stichliste.aligned .st-term::before,.praes-inhalt .stichliste li::before{width:10px;height:10px;top:.62em}
.praes-inhalt .applet-lead,.praes-inhalt .applet-note{font-size:21px!important;line-height:1.55!important}
.praes-inhalt .hinweis-grid{grid-template-columns:repeat(3,1fr)!important;gap:22px;margin-top:10px}
.praes-inhalt .hinweis-card p{font-size:23px!important;line-height:1.5!important}
.praes-inhalt .hinweis-card .hint-tag{font-size:13px!important}
.praes-inhalt .reveal{opacity:1!important;transform:none!important}
.praes-inhalt .video-grid{margin:0}
.praes-inhalt > :last-child{margin-bottom:0!important}
.praes-inhalt .formel-box{margin:0 auto!important}
.praes-k-note .applet-note{font-size:25px!important}

/* Schrittweises Einblenden (Fragmente) */
.praes-frag{transition:opacity .35s ease}
.praes-frag > *{transition:opacity .35s ease}
.praes-frag.praes-wartet{opacity:0;visibility:hidden}
.praes-frag.praes-wartet > *{opacity:0;visibility:hidden}

/* ---------- Titelfolie ---------- */
.praes-titel{background:var(--fach-hero-img,radial-gradient(900px 520px at 14% 16%,rgba(124,95,181,.48),transparent 60%),radial-gradient(900px 640px at 80% 96%,rgba(30,16,62,.92),transparent 60%),linear-gradient(135deg,#4a2f8f 0%,#2d1a5a 100%));background-color:var(--fach-hero,#2d1a5a);color:#fff;justify-content:center;padding:0 110px}
.praes-titel .praes-t-kicker{font:600 15px/1.3 'Fredoka',Inter,sans-serif;letter-spacing:.18em;text-transform:uppercase;color:rgba(255,255,255,.75);margin-bottom:22px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.praes-titel .praes-t-nr{display:inline-block;padding:6px 14px;border-radius:999px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.35);letter-spacing:.06em;color:#fff}
.praes-titel h1{font-family:'Fredoka',sans-serif;font-weight:500;font-size:84px;line-height:1.02;margin:0 0 26px;color:#fff}
.praes-titel p{font-size:26px;line-height:1.55;max-width:34em;margin:0;color:rgba(255,255,255,.9)}
.praes-titel .praes-t-hilfe{position:absolute;left:110px;bottom:42px;font-size:15px;color:rgba(255,255,255,.6)}

/* ---------- Fortschritt + Steuerung ---------- */
.praes-fort{position:absolute;left:0;right:0;bottom:0;height:5px;background:rgba(0,0,0,.08);z-index:3}
.praes-fort span{display:block;height:100%;width:0;background:var(--fach-strong,var(--physik-strong,#7c5fb5));transition:width .3s ease}
.praes-zahl{position:absolute;right:22px;bottom:14px;font:600 14px/1 'Fredoka',Inter,sans-serif;color:var(--ink-soft,#6b6b6b);z-index:3}
.praes-ctrl{position:fixed;left:50%;bottom:18px;transform:translateX(-50%);display:flex;align-items:center;gap:6px;padding:6px;border-radius:999px;background:rgba(20,12,40,.82);box-shadow:0 8px 24px rgba(0,0,0,.35);z-index:4;transition:opacity .3s}
.praes-ctrl button{width:44px;height:44px;border-radius:50%;border:0;background:transparent;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center}
.praes-ctrl button:hover{background:rgba(255,255,255,.14)}
.praes-ctrl button:focus-visible{outline:3px solid #f4d03f;outline-offset:1px}
.praes-ctrl button[disabled]{opacity:.35;cursor:default;background:transparent}
.praes-ctrl svg{width:22px;height:22px}
.praes-ctrl .praes-sep{width:1px;height:26px;background:rgba(255,255,255,.25);margin:0 4px}
.praes.ruhig .praes-ctrl{opacity:0;pointer-events:none}
.praes.ruhig{cursor:none}
.praes-schwarz{position:absolute;inset:0;background:#000;z-index:5;display:none}
.praes.schwarz .praes-schwarz{display:block}

@media (prefers-reduced-motion: reduce){
  .praes-frag,.praes-frag > *,.praes-fort span,.praes-ctrl,.praes-start{transition:none}
}

/* Fredoka überall in der Präsentation */
.praes-inhalt,.praes-inhalt p,.praes-inhalt li,.praes-inhalt span,.praes-inhalt button,.praes-inhalt small{font-family:'Fredoka',Inter,sans-serif}

/* Applet-Folien: schmaler Kopf, Applet bekommt die ganze Fläche */
.praes-k-applet .praes-head{padding:14px 40px 12px}
.praes-k-applet .praes-head h2{font-size:30px}
.praes-k-applet .praes-body{margin:18px 40px 26px}
.praes-inhalt .ap-frame,.praes-inhalt .kn-lab,.praes-inhalt .geogebra-wrap,.praes-inhalt .applet-lab{margin-top:0!important;margin-bottom:0!important}

/* Titelfolie: Ablauf rechts */
.praes-titel{padding:0 90px}
.praes-titel{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);column-gap:60px;align-content:center}
.praes-titel > .praes-t-kicker,.praes-titel > h1{grid-column:1 / -1}
.praes-titel > p{grid-column:1;align-self:start}
.praes-titel h1{font-size:80px;white-space:nowrap}
.praes-titel p{font-size:24px}
.praes-ablauf{grid-column:2;grid-row:3;align-self:start;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.25);border-radius:20px;padding:26px 30px}
.praes-ablauf-kopf{display:block;font-size:14px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:rgba(255,255,255,.7);margin-bottom:14px}
.praes-ablauf ol{margin:0;padding:0;list-style:none;counter-reset:ab;display:grid;gap:12px}
.praes-ablauf li{counter-increment:ab;display:grid;grid-template-columns:34px 1fr;gap:12px;align-items:baseline;font-size:21px;line-height:1.3;color:#fff}
.praes-ablauf li::before{content:counter(ab);width:30px;height:30px;border-radius:50%;background:rgba(255,255,255,.18);display:inline-flex;align-items:center;justify-content:center;font-size:15px;font-weight:600}
.praes-titel .praes-t-hilfe{left:90px}

/* „Halte fest“-Folie als Karte */
.praes-k-note .applet-note{background:#fff;border:1px solid var(--rule,#e2d9c8);border-left:8px solid var(--fach-strong,var(--physik-strong,#7c5fb5));border-radius:16px;padding:26px 32px;margin:0 0 18px!important;box-shadow:0 10px 28px -18px rgba(47,47,47,.45);color:var(--ink,#2f2f2f)}
.praes-marke{display:block;font-size:.72em;letter-spacing:.14em;text-transform:uppercase;color:var(--fach-strong,var(--physik-strong,#7c5fb5));margin-bottom:6px}

/* Stift */
.praes-stift{position:absolute;inset:0;width:100%;height:100%;z-index:2;pointer-events:none;touch-action:none}
.praes.stift-an .praes-stift{pointer-events:auto;cursor:crosshair}
.praes.stift-an.ruhig{cursor:auto}
.praes-ctrl button[aria-pressed=true]{background:#e2574c}

/* Folienübersicht */
.praes-uebersicht{position:fixed;inset:0;z-index:6;background:rgba(20,12,40,.92);color:#fff;overflow:auto;padding:40px 6vw}
.praes-uebersicht[hidden]{display:none}
.praes-ueb-kopf{font-size:28px;font-weight:500;margin-bottom:20px}
.praes-uebersicht ol{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.praes-uebersicht button{width:100%;min-height:110px;text-align:left;display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto 1fr;column-gap:12px;row-gap:4px;padding:16px 18px;border-radius:14px;border:1.5px solid rgba(255,255,255,.22);background:rgba(255,255,255,.07);color:#fff;font:inherit;cursor:pointer}
.praes-uebersicht button:hover,.praes-uebersicht button:focus-visible{background:rgba(255,255,255,.16);outline:none;border-color:#fff}
.praes-uebersicht button.aktiv{border-color:#f4d03f}
.praes-ueb-nr{grid-row:1 / span 2;width:34px;height:34px;border-radius:50%;background:var(--fach-strong,var(--physik-strong,#7c5fb5));display:flex;align-items:center;justify-content:center;font-weight:600}
.praes-ueb-k{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,.65)}
.praes-ueb-t{font-size:18px;line-height:1.3}

/* Zweispaltige Textfolie: Text links, Abbildung rechts */
.praes-inhalt.praes-2sp{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);column-gap:40px;align-items:center}
.praes-sp-r{display:grid;gap:18px}
.praes-sp-r > *{margin:0!important;max-width:100%!important;width:100%!important;box-sizing:border-box}
.praes-sp-r svg{width:100%;height:auto;max-height:none}
.praes-2sp .stichliste.aligned{grid-template-columns:1fr;row-gap:10px}
.praes-2sp .stichliste.aligned li{display:block;position:relative;padding-left:28px}
.praes-2sp .stichliste.aligned li::before{content:'';position:absolute;left:5px;top:.62em;width:10px;height:10px;border-radius:50%;background:var(--fach-strong,var(--physik-strong,#7c5fb5))}
.praes-2sp .stichliste.aligned .st-term{padding-left:0;display:inline;margin-right:.3em}
.praes-2sp .stichliste.aligned .st-term::before{content:none}
.praes-2sp .stichliste.aligned .st-text{display:inline}
.praes-2sp .praes-frag.praes-wartet{opacity:0;visibility:hidden}

/* Kästen, Tabellen, Abbildungen größer */
.praes-inhalt .dbox{margin:0 0 18px!important}
.praes-inhalt .dbox-body p,.praes-inhalt .dbox-body dd,.praes-inhalt .dbox-body dt,.praes-inhalt .dbox-body li{font-size:22px!important;line-height:1.5!important}
.praes-inhalt .dbox-note{font-size:17px!important}
.praes-inhalt table.fakten{font-size:19px!important;margin:0 0 18px!important;width:100%}
.praes-inhalt table.fakten th,.praes-inhalt table.fakten td{font-size:inherit!important}
.praes-inhalt table.fakten caption{font-size:16px!important}
.praes-inhalt .fig-title{font-size:18px!important}
.praes-inhalt .figur,.praes-inhalt figure{margin:0 auto 16px!important}

/* Herleitung Schritt für Schritt */
.praes-inhalt .herl-kopf{font-size:28px!important;margin:0 0 14px!important}
.praes-inhalt .umf{margin:0 0 18px!important}
.praes-inhalt .umf-eq{font-size:28px!important;overflow:visible!important}
.praes-inhalt .umf-op{font-size:19px!important}
.praes-inhalt .umf-note{font-size:18px!important}
.praes-inhalt .umf-row.praes-wartet + .umf-note{opacity:0;visibility:hidden}

/* Vorgerechnete Beispiele */
.praes-inhalt .worked{margin:0!important;padding:28px 34px!important}
.praes-inhalt .worked h3{font-size:28px!important}
.praes-inhalt .worked .intro{font-size:21px!important;line-height:1.5}
.praes-inhalt .worked-step{font-size:21px!important;line-height:1.5}
.praes-inhalt .hinweis-card h4{font-size:20px!important}

/* Applet im Querformat (automatisch gewählt, wenn die Grafik so größer wird) */
.praes-quer{display:grid!important;grid-template-columns:minmax(0,1.75fr) minmax(0,1fr);column-gap:22px;row-gap:0;align-items:start}
.praes-quer > *{grid-column:2;min-width:0;margin-top:0!important;margin-bottom:12px!important}
.praes-quer > .praes-quer-haupt{grid-column:1;grid-row:1 / span 12;width:100%!important;max-width:none!important;height:auto;margin:0!important}
.praes-quer .applet-controls{grid-template-columns:1fr!important}

/* Mehrere Abbildungen nebeneinander */
.praes-figs{display:grid;grid-template-columns:repeat(var(--n,2),minmax(0,1fr));gap:22px;align-items:start}
.praes-figs > *{margin:0!important}
.praes-inhalt > p,.praes-sp-l > p{text-align:justify!important;text-align-last:left;hyphens:auto;-webkit-hyphens:auto;word-spacing:normal}
.praes-inhalt .field-gallery{grid-template-columns:repeat(3,minmax(0,1fr))!important}
.praes-head .erklaer-text{color:rgba(255,255,255,.9)!important;font-size:21px!important;line-height:1.45!important;margin:8px 0 0!important;max-width:none;text-align:left!important}
.praes-head .erklaer-text strong,.praes-head .erklaer-text em{color:#fff!important}
.praes-inhalt.praes-2sp-stapel{grid-template-columns:1fr!important;row-gap:14px}
.praes-2sp-stapel .praes-sp-r{grid-auto-flow:column;justify-content:center}
.praes-sp-r svg,.praes-sp-r img{max-width:100%!important;width:100%!important;height:auto!important}
.praes-inhalt > .dbox{margin-left:auto!important;margin-right:auto!important}
.praes-inhalt .video-grid{display:grid!important;grid-template-columns:repeat(2,minmax(0,1fr))!important;gap:22px!important}
.praes-inhalt .video-grid > *{grid-column:auto!important;width:auto!important;max-width:none!important;margin:0!important}
.praes-slide:not(.aktiv) *{visibility:hidden!important}

/* Titelfolie einspaltig, Ablauf auf eigener Folie */
.praes-titel{grid-template-columns:1fr!important}
.praes-titel > p{grid-column:1!important;max-width:40em}
.praes-k-ablauf .praes-body{margin-left:90px;margin-right:90px}
.praes-ablauf-liste{list-style:none;margin:0;padding:0;counter-reset:ab;display:grid;gap:18px}
.praes-ablauf-liste li{counter-increment:ab;display:grid;grid-template-columns:52px 1fr;gap:18px;align-items:center;font-size:30px;line-height:1.3;color:var(--ink,#2f2f2f)}
.praes-ablauf-liste li::before{content:counter(ab);width:46px;height:46px;border-radius:50%;background:var(--fach-strong,var(--physik-strong,var(--mathe-strong,#7c5fb5)));color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:22px;font-weight:600}
/* Zusammenhängende Texte im Blocksatz (Stichpunkte bleiben linksbündig) */
.praes-k-note .applet-note,.praes-head .erklaer-text,.praes-inhalt .worked .intro{text-align:justify!important;text-align-last:left;hyphens:auto;-webkit-hyphens:auto}
.praes-ablauf-liste.praes-ablauf-zwei{grid-template-columns:1fr 1fr;column-gap:48px}