:root{--ink:#10213c;--muted:#65728a;--navy:#071c35;--blue:#1976bc;--blue-soft:#dff3ff;--green:#42a85a;--green-soft:#e7f7df;--orange:#e87516;--orange-soft:#fff0d5;--red:#d92948;--red-soft:#ffe2e8;--violet:#6c55d9;--paper:#f6f8fc;--line:#dce3ee;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper)}button,input,textarea{font:inherit}.skip-link{position:absolute;left:-999px;z-index:100;background:white;padding:.75rem}.skip-link:focus{left:1rem;top:1rem}.security-hero{background:radial-gradient(circle at 85% 25%,rgba(30,190,255,.28),transparent 24rem),linear-gradient(135deg,#07182c,#0a3159 58%,#075377)}.security-hero .eyebrow{color:#68d9ff}.security-back{display:inline-block;margin-bottom:1.5rem;color:#d6efff;font-weight:800;text-decoration:none}.security-card{border-top:5px solid #168aca;background:linear-gradient(145deg,#fff,#eff9ff)}.ds-lesson{min-height:100vh;min-height:100dvh;overflow:hidden;background:radial-gradient(circle at 15% 10%,#fff 0,transparent 30rem),var(--paper)}.ds-topbar{position:fixed;z-index:30;inset:0 96px auto 0;height:72px;display:flex;align-items:center;justify-content:space-between;gap:2rem;padding:0 clamp(1rem,3vw,2.5rem);border-bottom:1px solid rgba(220,227,238,.9);background:rgba(255,255,255,.94);backdrop-filter:blur(14px)}.ds-brand{display:flex;align-items:center;gap:.8rem;color:inherit;text-decoration:none;font-weight:900}.ds-brand>span:first-child{display:grid;width:42px;height:42px;place-items:center;border-radius:13px;color:#fff;background:linear-gradient(135deg,#176fb4,#0aa6b2)}.ds-brand>span:last-child{display:grid;line-height:1.12}.ds-brand small{color:var(--muted);font-size:.68rem;font-weight:750}.ds-progress{display:flex;align-items:center;gap:.8rem;color:var(--muted);font-size:.8rem;font-weight:850}.ds-progress i{display:block;width:140px;height:7px;overflow:hidden;border-radius:10px;background:#e5eaf2}.ds-progress b{display:block;width:16.67%;height:100%;border-radius:inherit;background:linear-gradient(90deg,#1976bc,#10a6a0);transition:width .3s}.ds-stage{position:fixed;inset:72px 96px 0 0;overflow:hidden}.ds-slide{height:100%;overflow:auto;padding:clamp(1.2rem,3.3vh,2.5rem) clamp(1rem,4vw,4rem) 6rem}.ds-slide[hidden]{display:none}.ds-slide-inner{width:min(1150px,100%);margin:0 auto}.ds-kicker{margin:0 0 .5rem;color:var(--blue);font-size:.76rem;font-weight:900;letter-spacing:.12em;text-transform:uppercase}.ds-slide h1{max-width:950px;margin:0;font-size:clamp(2rem,4.5vw,4.4rem);line-height:1;letter-spacing:-.05em}.ds-lead{max-width:780px;margin:.8rem 0 1.5rem;color:var(--muted);font-size:clamp(1rem,1.6vw,1.18rem)}.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.concept{position:relative;min-height:310px;padding:clamp(1.3rem,3vw,2.2rem);overflow:hidden;border-radius:24px}.concept.privacy{background:linear-gradient(135deg,#e1f5ff,#cceeff)}.concept.security{background:linear-gradient(135deg,#edffe4,#d9f4c5)}.concept h2{margin:.2rem 0 1rem;font-size:clamp(1.55rem,3vw,2.5rem)}.concept ul{margin:0;padding-left:1.2rem;font-size:clamp(.96rem,1.6vw,1.12rem);line-height:1.65}.concept li+li{margin-top:.65rem}.concept-icon{color:rgba(7,28,53,.16);font-size:2rem;font-weight:900;letter-spacing:-.5rem}.memory{margin-top:1rem;padding:1rem 1.3rem;border-left:5px solid var(--blue);border-radius:0 14px 14px 0;background:#fff;box-shadow:0 10px 30px rgba(16,33,60,.07)}.memory strong{margin-right:.45rem}.goals-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.goal{display:flex;min-height:350px;flex-direction:column;padding:clamp(1.2rem,2.5vw,1.8rem);border-radius:24px}.goal.confidentiality{background:var(--blue-soft)}.goal.integrity{background:var(--orange-soft)}.goal.availability{background:var(--red-soft)}.goal-symbol{font-size:2rem;font-weight:900}.goal h2{margin:.3rem 0 1rem;font-size:clamp(1.3rem,2.4vw,2rem)}.goal p{font-size:1.03rem}.goal>div{margin-top:auto;padding:1rem;border-radius:14px;background:rgba(255,255,255,.7)}.goal strong{display:block}.question-stack{display:grid;grid-template-columns:repeat(2,1fr);gap:.7rem}.quiz-row{padding:1rem;border:1px solid var(--line);border-radius:16px;background:#fff}.quiz-row p{margin:0 0 .7rem;font-weight:750}.choice-row{display:flex;flex-wrap:wrap;gap:.45rem}.choice-row button{padding:.5rem .7rem;border:1px solid var(--line);border-radius:9px;background:#f7f9fc;color:#35425a;cursor:pointer;font-weight:750}.choice-row button:hover{border-color:#8bbce0}.choice-row button.is-correct{border-color:#4baf65;background:#e8f7ec;color:#1d6c33}.choice-row button.is-wrong{border-color:#dc6277;background:#fff0f3;color:#a51c34}.inline-feedback{display:block;min-height:1.2em;margin:.5rem 0 0;font-size:.82rem;font-weight:750}.own-examples{margin-top:1.4rem;padding:1.2rem;border-radius:20px;background:#eef1ff}.section-line{display:flex;align-items:end;justify-content:space-between;gap:1rem}.section-line h2{margin:0}.example-inputs{display:grid;grid-template-columns:repeat(3,1fr);gap:.7rem}.example-inputs label{font-weight:850}.example-inputs textarea{width:100%;min-height:76px;margin-top:.35rem;padding:.65rem;border:1px solid #cbd4e4;border-radius:10px;resize:vertical}.sample{display:block;margin-top:.35rem;color:#4f5a71;font-size:.8rem;font-weight:600}.matrix-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:18px;background:#fff}.protection-matrix{width:100%;min-width:700px;border-collapse:collapse}.protection-matrix th,.protection-matrix td{padding:.7rem 1rem;border-bottom:1px solid var(--line);text-align:center}.protection-matrix th:first-child,.protection-matrix td:first-child{text-align:left}.protection-matrix tr:last-child td{border-bottom:0}.protection-matrix small{display:block;color:var(--muted);font-weight:500}.matrix-check{width:24px;height:24px;accent-color:var(--blue)}.protection-matrix tr.is-correct{background:#effaf2}.protection-matrix tr.is-wrong{background:#fff1f3}.dot{display:inline-block;width:10px;height:10px;border-radius:50%}.dot.blue{background:var(--blue)}.dot.orange{background:var(--orange)}.dot.red{background:var(--red)}.action-row{display:flex;align-items:center;gap:.7rem;margin-top:1rem}.primary-button,.ghost-button{min-height:42px;padding:.65rem 1rem;border-radius:10px;cursor:pointer;font-weight:850}.primary-button{border:1px solid var(--blue);color:#fff;background:var(--blue)}.ghost-button{border:1px solid #c8d2e2;color:#34445f;background:#fff}.global-feedback{font-weight:850}.global-feedback.good{color:#23763a}.global-feedback.bad{color:#b1253d}.scenario-list{display:grid;grid-template-columns:repeat(2,1fr);gap:.65rem}.scenario{border:1px solid var(--line);border-radius:14px;background:#fff}.scenario summary{padding:.9rem 1rem;cursor:pointer;font-weight:800;list-style:none}.scenario summary::after{float:right;content:"+";color:var(--blue);font-size:1.2rem}.scenario[open] summary::after{content:"−"}.scenario-answer{padding:0 1rem 1rem;color:#435069}.scenario-answer strong{color:#1e7237}.threat-box{margin-top:1.2rem;padding:1.2rem;border-radius:20px;background:#f0edff}.threat-box h2{margin:0}.threat-inputs{display:grid;gap:.55rem;margin:1rem 0}.threat-inputs label{display:flex;align-items:center;gap:.5rem;font-weight:900}.threat-inputs input{width:100%;padding:.65rem;border:1px solid #cfc7f0;border-radius:9px}.threat-samples{display:grid;gap:.45rem;margin-top:.75rem}.exit-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.exit-grid article{min-height:330px;padding:1.3rem;border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:0 10px 30px rgba(16,33,60,.06)}.exit-grid article>span{color:#a4b1c5;font-size:2rem;font-weight:950}.exit-grid h2{min-height:2.3em;margin:.2rem 0 1.2rem}.exit-grid label{display:block;margin:.75rem 0;font-weight:750}.exit-grid input[type=text],.exit-grid input:not([type]){width:100%;margin-top:.35rem;padding:.65rem;border:1px solid #cbd4e4;border-radius:9px}.exit-options{display:grid;gap:.55rem}.exit-options label{padding:.65rem;border-radius:9px;background:#f4f7fb}.next-arrow{position:fixed;z-index:20;right:calc(96px + 1.2rem);bottom:1rem;display:flex;align-items:center;gap:.65rem;padding:.72rem 1rem;border:0;border-radius:999px;color:#fff;background:var(--navy);box-shadow:0 12px 30px rgba(7,28,53,.25);cursor:pointer;font-weight:900}.next-arrow span{font-size:.8rem}.ds-rail{position:fixed;z-index:40;inset:0 0 0 auto;width:96px;display:flex;flex-direction:column;background:var(--navy)}.ds-rail button{position:relative;flex:1;min-height:0;padding:.4rem;border:0;border-bottom:1px solid rgba(255,255,255,.09);color:#8ea1b8;background:transparent;cursor:pointer}.ds-rail button::before{position:absolute;inset:0 auto 0 0;width:4px;content:"";background:transparent}.ds-rail span{display:block;font-size:.68rem;font-weight:900}.ds-rail b{display:block;margin-top:.25rem;font-size:.68rem;line-height:1.15}.ds-rail button:hover,.ds-rail button.is-current{color:#fff;background:#0e3154}.ds-rail button.is-current::before{background:#39bfea}.ds-rail button.is-done span{color:#5ee09a}@media(max-width:850px){.ds-topbar{inset:0 0 auto;height:64px}.ds-stage{inset:64px 0 62px}.ds-rail{inset:auto 0 0;width:auto;height:62px;flex-direction:row}.ds-rail button{border-right:1px solid rgba(255,255,255,.09);border-bottom:0}.ds-rail button::before{inset:auto 0 0;width:auto;height:4px}.ds-rail b{display:none}.next-arrow{right:1rem;bottom:74px}.compare-grid,.goals-grid,.exit-grid{grid-template-columns:1fr}.question-stack,.scenario-list{grid-template-columns:1fr}.example-inputs{grid-template-columns:1fr}.ds-slide{padding-bottom:6rem}.concept,.goal,.exit-grid article{min-height:auto}.ds-progress i{width:80px}}@media(max-width:520px){.ds-brand small{display:none}.ds-progress i{display:none}.ds-slide h1{font-size:2rem}.ds-slide{padding:1.1rem .85rem 6rem}.section-line,.action-row{align-items:stretch;flex-direction:column}.next-arrow span{display:none}}
/* Give the classroom navigation enough room for every German section title. */
@media (min-width:851px){.ds-topbar{right:112px}.ds-stage{right:112px}.ds-rail{width:112px}.next-arrow{right:calc(112px + 1.2rem)}}

/* Persistent lesson controls */
.ds-header-left{display:flex;align-items:center;gap:1rem;min-width:0}.ds-header-back{display:inline-flex;align-items:center;gap:.35rem;min-height:40px;padding:.45rem .7rem;border:1px solid #ccd6e4;border-radius:10px;color:#203653;background:#fff;font-size:.78rem;font-weight:850;text-decoration:none;white-space:nowrap}.ds-header-back:hover{border-color:#84b9de;background:#eff8ff}.prev-arrow{position:fixed;z-index:20;left:1.2rem;bottom:1rem;display:flex;align-items:center;gap:.65rem;padding:.72rem 1rem;border:1px solid #cbd5e3;border-radius:999px;color:#263952;background:#fff;box-shadow:0 12px 30px rgba(7,28,53,.13);cursor:pointer;font-weight:900}.prev-arrow:disabled{visibility:hidden}.ds-rail button{overflow:hidden}.ds-rail b{overflow-wrap:anywhere}
@media(max-width:850px){.ds-stage{right:74px;bottom:0}.ds-topbar{right:74px}.ds-rail{inset:0 0 0 auto;width:74px;height:auto;flex-direction:column}.ds-rail button{border-right:0;border-bottom:1px solid rgba(255,255,255,.09)}.ds-rail button::before{inset:0 auto 0 0;width:4px;height:auto}.ds-rail b{display:block;font-size:.56rem}.next-arrow{right:calc(74px + .65rem);bottom:.75rem}.prev-arrow{left:.65rem;bottom:.75rem}.ds-slide{padding-bottom:5.5rem}.ds-header-left{gap:.55rem}.ds-header-back span{display:none}.ds-header-back{padding:.45rem .62rem}.ds-brand>span:first-child{display:none}.ds-progress i{display:none}}
@media(max-width:520px){.ds-topbar{padding-inline:.6rem}.ds-brand>span:last-child small{display:none}.ds-brand>span:last-child{font-size:.88rem}.ds-progress{font-size:.72rem}.prev-arrow span,.next-arrow span{display:none}.prev-arrow,.next-arrow{width:44px;height:44px;justify-content:center;padding:0}}

/* Compact unit overview hero */
.training-hero.security-hero{padding:1.65rem 0 1.85rem}.security-hero .security-back{margin-bottom:.75rem}.security-hero h1{margin:0 0 .65rem;font-size:clamp(2.35rem,5vw,4rem);line-height:.98}.security-hero p:last-child{margin:0;font-size:1rem;line-height:1.5}
@media(max-width:600px){.training-hero.security-hero{padding:1.2rem 0 1.4rem}.security-hero h1{font-size:clamp(2rem,10vw,2.8rem)}}
.caesar-card{border-top-color:#7353c7;background:linear-gradient(145deg,#fff,#f2efff)}
.crack-card{border-top-color:#8b5ad9;background:linear-gradient(145deg,#fff,#f3efff)}
.vig-card{border-top-color:#7a54c9;background:linear-gradient(145deg,#fff,#f2edff)}
.security-hero + .section .training-grid{grid-template-columns:1fr}
.security-hero + .section .training-card{min-height:0}

/* Lesson icons, tabular security check, and reliable disclosure visibility */
.concept-icon,.goal-symbol{display:block;width:54px;height:54px;color:currentColor}.concept-icon svg,.goal-symbol svg{width:100%;height:100%;fill:currentColor;stroke:currentColor;stroke-width:3;stroke-linecap:round;stroke-linejoin:round}.concept-icon svg path,.goal-symbol svg path{fill:none}.privacy .concept-icon,.confidentiality .goal-symbol{color:#126b9e}.security .concept-icon{color:#28783a}.availability .goal-symbol{color:#bd1c3a}.security-table td:first-child{width:55%;font-weight:650}.security-table input[type="radio"]{width:24px;height:24px;accent-color:var(--blue)}.security-table tr.is-correct{background:#effaf2}.security-table tr.is-wrong{background:#fff1f3}.sample[hidden],.threat-samples[hidden]{display:none!important}

/* Einheitlicher Stunden-Header: Diese direkte Dreierstruktur gilt auch als Vorlage für neue Stunden. */
.ds-topbar{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:1rem}.ds-topbar>.ds-brand,.ds-header-left>.ds-brand{grid-column:1;grid-row:1;justify-self:start;min-width:0}.ds-topbar>.ds-progress{grid-column:2;grid-row:1;justify-self:center}.ds-topbar>.ds-header-back,.ds-header-left>.ds-header-back{grid-column:3;grid-row:1;justify-self:end}.ds-topbar>.ds-header-left{display:contents}
@media(max-width:850px){.ds-topbar{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:.55rem}.ds-topbar>.ds-brand>span:first-child{display:grid;width:38px;height:38px}.ds-topbar>.ds-progress i{display:none}}
@media(max-width:520px){.ds-topbar>.ds-brand>span:last-child{font-size:.8rem}.ds-topbar>.ds-header-back span{display:none}.ds-topbar>.ds-header-back{width:40px;justify-content:center;padding:.4rem}.ds-topbar>.ds-brand>span:first-child{width:36px;height:36px;border-radius:11px}.ds-topbar>.ds-progress{font-size:.68rem}}