:root{
  --navy:#082945;
  --navy-2:#0c395d;
  --blue:#1768d4;
  --blue-2:#3d8df2;
  --cyan:#69b8ef;
  --ink:#142333;
  --muted:#637386;
  --line:#dce4ec;
  --surface:#ffffff;
  --soft:#f4f7fa;
  --soft-blue:#eef6ff;
  --green:#2d8a64;
  --green-soft:#e9f7f0;
  --orange:#b66a18;
  --orange-soft:#fff3e6;
  --purple:#7554b7;
  --purple-soft:#f3effc;
  --danger:#b84a4a;
  --shadow:0 18px 50px rgba(24,45,67,.12);
  --shadow-sm:0 8px 24px rgba(24,45,67,.09);
  --radius:22px;
  --topbar:68px;
  --rail:86px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--soft)}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:linear-gradient(180deg,#f9fbfd 0,#f3f6f9 100%);min-height:100vh}
button,input,textarea,select{font:inherit}
button{color:inherit}
svg{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
img{max-width:100%;display:block}
.skip-link{position:fixed;left:12px;top:-60px;z-index:999;background:#fff;color:#000;padding:12px 16px;border-radius:10px;box-shadow:var(--shadow);transition:.2s}.skip-link:focus{top:12px}

.app-shell{min-height:100vh}
.topbar{height:var(--topbar);position:fixed;inset:0 0 auto 0;background:rgba(7,36,61,.97);backdrop-filter:blur(14px);color:#fff;z-index:100;border-bottom:1px solid rgba(255,255,255,.08)}
.topbar__inner{height:100%;display:flex;align-items:center;gap:28px;padding:0 22px 0 18px}
.brand{display:flex;align-items:center;gap:12px;border:0;background:transparent;color:#fff;padding:0;cursor:pointer;text-align:left;min-width:290px}
.brand__mark{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;background:linear-gradient(145deg,#2f7de0,#0a4c8b);box-shadow:inset 0 0 0 1px rgba(255,255,255,.18)}
.brand__mark svg{width:28px;height:28px}.brand__text{display:flex;flex-direction:column;line-height:1.15}.brand__text strong{font-size:.96rem;letter-spacing:.01em}.brand__text small{opacity:.72;font-size:.72rem;margin-top:4px}
.topnav{display:flex;align-items:stretch;height:100%;gap:4px}.topnav__item{border:0;background:transparent;color:rgba(255,255,255,.72);padding:0 15px;cursor:pointer;position:relative;font-size:.88rem;font-weight:700}.topnav__item:hover,.topnav__item.is-active{color:#fff}.topnav__item.is-active:after{content:"";position:absolute;height:3px;left:14px;right:14px;bottom:0;background:#67b8ff;border-radius:5px 5px 0 0}
.topbar__actions{margin-left:auto;display:flex;align-items:center;gap:9px}.icon-button,.avatar-button{width:40px;height:40px;border-radius:13px;border:1px solid rgba(255,255,255,.15);background:rgba(255,255,255,.08);color:#fff;display:grid;place-items:center;cursor:pointer}.icon-button:hover,.avatar-button:hover{background:rgba(255,255,255,.15)}.icon-button svg{width:20px;height:20px}.avatar-button{font-size:.72rem;font-weight:900;background:#fff;color:var(--navy)}

.rail{position:fixed;z-index:90;top:var(--topbar);bottom:0;left:0;width:var(--rail);background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column;align-items:center;padding:18px 8px;gap:8px}
.rail__item{width:70px;border:0;background:transparent;border-radius:16px;padding:9px 4px;color:#687789;display:flex;flex-direction:column;align-items:center;gap:5px;font-size:.69rem;font-weight:750;cursor:pointer}.rail__item:hover{background:#f3f7fb;color:var(--blue)}.rail__item.is-active{background:var(--soft-blue);color:var(--blue)}.rail__icon{width:34px;height:34px;border-radius:11px;display:grid;place-items:center}.rail__item.is-active .rail__icon{background:#fff;box-shadow:0 5px 12px rgba(40,100,180,.12)}.rail__icon svg{width:21px;height:21px}

.main{padding-top:var(--topbar);padding-left:var(--rail);min-height:100vh}
.view{display:none;padding:26px clamp(18px,3.2vw,54px) 72px;max-width:1680px;margin:0 auto}.view.is-active{display:block}
.page-heading{display:flex;justify-content:space-between;gap:32px;align-items:flex-end;margin:10px 0 22px}.page-heading h1{font-size:clamp(2.45rem,5vw,5rem);line-height:.96;letter-spacing:-.055em;margin:7px 0 16px;color:var(--navy)}.page-heading p{max-width:760px;color:var(--muted);font-size:1.05rem;line-height:1.68;margin:0}.eyebrow{text-transform:uppercase;font-size:.72rem;letter-spacing:.14em;font-weight:900;color:var(--blue)}
.heading-card{min-width:315px;max-width:380px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:15px;display:flex;align-items:center;gap:12px;box-shadow:var(--shadow-sm)}.heading-card__icon{width:44px;height:44px;border-radius:14px;background:var(--soft-blue);color:var(--blue);display:grid;place-items:center;flex:none}.heading-card__icon svg{width:24px;height:24px}.heading-card div{display:flex;flex-direction:column;gap:4px;min-width:0}.heading-card strong{font-size:.92rem}.heading-card span{font-size:.75rem;color:var(--muted)}.mini-button{margin-left:auto;border:0;background:#edf4fc;color:var(--blue);padding:8px 10px;border-radius:10px;font-size:.75rem;font-weight:850;cursor:pointer}

.house-layout,.sat-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:22px;align-items:stretch}
.house-layout>*,.sat-layout>*,.scene-card,.sat-stage,.home-panel,.sat-summary{min-width:0}
.sat-layout{align-items:start}.sat-stage,.sat-summary{align-self:start}
.scene-card,.sat-stage{position:relative;border-radius:28px;overflow:hidden;background:#fff;box-shadow:var(--shadow);border:1px solid rgba(24,50,75,.08)}.scene-card img,.sat-stage img{width:100%;height:100%;object-fit:cover}.scene-card--house{aspect-ratio:16/9}
.scene-hotspot,.sat-hotspot{position:absolute;border:0;background:transparent;cursor:pointer;border-radius:18px}.scene-hotspot:focus-visible,.scene-hotspot:hover,.sat-hotspot:focus-visible,.sat-hotspot:hover{outline:4px solid rgba(43,132,242,.65);outline-offset:4px;background:rgba(61,141,242,.06)}
.scene-hotspot--roof{left:22%;top:4%;width:20%;height:13%}.scene-hotspot--tech{left:24%;top:71%;width:20%;height:13%}.scene-hotspot--network{left:9%;top:47%;width:21%;height:13%}.scene-hotspot--door{right:1.5%;top:47%;width:20%;height:13%}.scene-hotspot--knx{left:48%;top:43%;width:23%;height:13%}.scene-hotspot--security{right:20%;top:13%;width:20%;height:13%}.scene-hotspot--docs{left:53%;bottom:1.5%;width:22%;height:13%}
.home-panel,.sat-summary{background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow-sm);padding:22px;display:flex;flex-direction:column}.home-panel__top strong{display:block;font-size:1.08rem;margin:7px 0 12px}.home-panel__top p{font-size:.78rem;color:var(--muted);line-height:1.5}.progress-bar{height:9px;border-radius:20px;background:#e9eef4;overflow:hidden}.progress-bar span{height:100%;display:block;width:0;background:linear-gradient(90deg,var(--blue),var(--cyan));border-radius:20px;transition:.4s}
.home-panel__list{margin:12px -8px 18px;display:flex;flex-direction:column}.home-panel__list button{border:0;background:transparent;display:grid;grid-template-columns:13px 1fr 18px;gap:10px;align-items:center;text-align:left;padding:11px 8px;border-radius:12px;cursor:pointer}.home-panel__list button:hover{background:#f5f8fb}.home-panel__list strong{display:block;font-size:.82rem}.home-panel__list small{display:block;color:var(--muted);font-size:.69rem;margin-top:3px}.home-panel__list svg{width:17px;color:#8290a0}.dot{width:9px;height:9px;border-radius:50%;background:#ccd5de}.dot--active{background:var(--blue);box-shadow:0 0 0 5px rgba(23,104,212,.12)}

.primary-button,.secondary-button,.outline-button{border-radius:13px;padding:12px 16px;font-weight:850;cursor:pointer;border:0;transition:.15s}.primary-button{background:linear-gradient(135deg,#1768d4,#0b51ad);color:#fff;box-shadow:0 9px 18px rgba(23,104,212,.22)}.primary-button:hover{transform:translateY(-1px);box-shadow:0 12px 25px rgba(23,104,212,.3)}.secondary-button{background:#eef4fb;color:#174f89}.outline-button{background:#fff;border:1px solid var(--line);color:var(--navy)}.primary-button--wide,.secondary-button--wide{width:100%}

.content-section{margin-top:38px}.content-section--tight{margin-top:28px}.section-title{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:18px}.section-title h2{font-size:clamp(1.65rem,3vw,2.5rem);letter-spacing:-.035em;margin:6px 0 0;color:var(--navy)}.section-title>p{max-width:520px;color:var(--muted);line-height:1.6;margin:0}.section-title--compact{align-items:center}.area-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px}.area-tile{position:relative;min-height:230px;overflow:hidden;border:0;border-radius:22px;padding:0;background:#15283a;cursor:pointer;text-align:left;box-shadow:var(--shadow-sm)}.area-tile img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .35s}.area-tile__overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(4,26,46,.02) 24%,rgba(4,26,46,.84) 100%)}.area-tile__content{position:absolute;inset:auto 18px 18px;color:#fff;display:flex;flex-direction:column;gap:5px}.area-tile__content small{text-transform:uppercase;letter-spacing:.12em;font-size:.63rem;font-weight:900;color:#a9d7ff}.area-tile__content strong{font-size:1rem}.area-tile__content em{font-style:normal;font-size:.74rem;opacity:.8;line-height:1.4}.area-tile:hover img{transform:scale(1.035)}.area-tile--active{grid-column:span 2;grid-row:span 2;min-height:476px}.area-tile--active .area-tile__content strong{font-size:1.55rem}.area-tile--active .area-tile__content em{font-size:.88rem}

.breadcrumbs{display:flex;align-items:center;gap:7px;color:#8090a0;font-size:.78rem;margin:3px 0 18px}.breadcrumbs button{border:0;background:transparent;padding:0;color:var(--blue);font-weight:800;cursor:pointer}.breadcrumbs strong{color:var(--ink)}
.sat-layout{grid-template-columns:minmax(0,1fr) 350px}.sat-stage{aspect-ratio:16/9}.sat-hotspot--align{left:6%;top:16%;width:20%;height:13%}.sat-hotspot--db{left:31%;top:36%;width:20%;height:12%}.sat-hotspot--parts{right:22%;top:29%;width:21%;height:13%}.sat-hotspot--plan{left:30%;bottom:16%;width:21%;height:13%}.sat-hotspot--doc{right:7%;bottom:18%;width:22%;height:13%}.sat-hotspot--msk{left:35%;top:51%;width:17%;height:22%}
.sat-summary h1{font-size:2rem;line-height:1.05;letter-spacing:-.045em;color:var(--navy);margin:8px 0 13px}.sat-summary>p{color:var(--muted);line-height:1.6;margin:0}.summary-stat{display:flex;align-items:center;justify-content:space-between;margin:20px 0}.summary-stat>span{display:flex;flex-direction:column}.summary-stat strong{font-size:2rem;color:var(--navy)}.summary-stat small{color:var(--muted)}.progress-ring{width:68px;height:68px;border-radius:50%;background:conic-gradient(var(--blue) 0deg,#e7edf3 0);display:grid;place-items:center;transition:.3s}.progress-ring span{width:51px;height:51px;border-radius:50%;background:#fff}.summary-actions{display:flex;flex-direction:column;gap:9px}.quick-path{border-top:1px solid var(--line);margin-top:18px;padding-top:17px}.quick-path>strong{font-size:.82rem}.quick-path ol{list-style:none;padding:0;margin:10px 0 0;display:flex;flex-direction:column;gap:8px}.quick-path li{display:flex;align-items:center;gap:9px;font-size:.78rem;color:var(--muted)}.quick-path li span{width:23px;height:23px;border-radius:8px;background:#edf3f9;color:var(--blue);display:grid;place-items:center;font-size:.68rem;font-weight:900}.quick-path li.is-done{color:var(--green);font-weight:750}.quick-path li.is-done span{background:var(--green-soft);color:var(--green)}
.module-group{margin-top:26px}.module-group__title{display:flex;align-items:flex-start;gap:14px;margin-bottom:13px}.module-group__title h3{font-size:1.22rem;margin:0;color:var(--navy)}.module-group__title p{margin:4px 0 0;color:var(--muted);font-size:.86rem}.module-label{padding:7px 10px;border-radius:10px;font-size:.66rem;text-transform:uppercase;letter-spacing:.08em;font-weight:950}.module-label--required{background:var(--soft-blue);color:var(--blue)}.module-label--depth{background:var(--purple-soft);color:var(--purple)}
.module-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.module-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:19px;overflow:hidden;text-align:left;padding:0;cursor:pointer;box-shadow:0 8px 20px rgba(24,45,67,.06);transition:.2s}.module-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);border-color:#cbd9e8}.module-card__image{height:130px;position:relative;overflow:hidden;background:#dfe9f2}.module-card__image img{width:100%;height:100%;object-fit:cover}.module-card__image:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(5,32,55,.45))}.module-card__body{padding:15px}.module-card__top{display:flex;justify-content:space-between;gap:8px;align-items:center;margin-bottom:9px}.module-card__type{font-size:.64rem;font-weight:900;text-transform:uppercase;letter-spacing:.08em;color:var(--blue)}.module-card.depth .module-card__type{color:var(--purple)}.module-card h4{font-size:1rem;line-height:1.25;margin:0 0 7px;color:var(--navy)}.module-card p{font-size:.77rem;color:var(--muted);line-height:1.45;margin:0}.module-card__footer{display:flex;justify-content:space-between;align-items:center;padding:0 15px 15px;font-size:.7rem;color:var(--muted)}.status-chip{display:inline-flex;align-items:center;gap:5px;padding:6px 8px;border-radius:9px;background:#f1f4f7}.status-chip.is-done{background:var(--green-soft);color:var(--green);font-weight:850}.status-chip i{width:7px;height:7px;background:#b8c3ce;border-radius:50%}.status-chip.is-done i{background:var(--green)}.module-card__arrow{width:31px;height:31px;border-radius:10px;background:#edf4fb;color:var(--blue);display:grid;place-items:center}.module-card__arrow svg{width:16px;height:16px}

.chapter-shell{display:grid;grid-template-columns:280px minmax(0,1fr);gap:22px;align-items:start}.chapter-sidebar{position:sticky;top:calc(var(--topbar) + 20px);background:#fff;border:1px solid var(--line);border-radius:22px;padding:17px;box-shadow:var(--shadow-sm)}.chapter-sidebar__back{border:0;background:#eef4fb;color:var(--blue);border-radius:10px;padding:9px 10px;font-weight:850;cursor:pointer;width:100%;text-align:left}.chapter-sidebar h3{font-size:1rem;margin:18px 0 8px}.chapter-sidebar nav{display:flex;flex-direction:column;gap:5px}.chapter-sidebar nav button{border:0;background:transparent;border-radius:10px;padding:9px 10px;text-align:left;font-size:.77rem;color:var(--muted);cursor:pointer}.chapter-sidebar nav button:hover,.chapter-sidebar nav button.is-active{background:var(--soft-blue);color:var(--blue);font-weight:850}.chapter-sidebar__progress{margin-top:16px;border-top:1px solid var(--line);padding-top:14px}.chapter-sidebar__progress small{color:var(--muted)}
.chapter-article{min-width:0}.chapter-cover{border-radius:26px;overflow:hidden;position:relative;min-height:340px;display:flex;align-items:flex-end;padding:30px;background:#0d2e4c;box-shadow:var(--shadow)}.chapter-cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.chapter-cover:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,29,50,.92) 0%,rgba(5,29,50,.65) 52%,rgba(5,29,50,.08) 100%)}.chapter-cover__content{position:relative;z-index:1;color:#fff;max-width:720px}.chapter-cover__content .eyebrow{color:#9dd3ff}.chapter-cover h1{font-size:clamp(2rem,4.5vw,4.2rem);line-height:1;letter-spacing:-.05em;margin:8px 0 14px}.chapter-cover p{line-height:1.62;color:rgba(255,255,255,.82);margin:0}.chapter-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:17px}.chapter-meta span{font-size:.7rem;padding:7px 9px;border-radius:10px;background:rgba(255,255,255,.12);backdrop-filter:blur(10px)}
.chapter-tabs{position:sticky;top:var(--topbar);z-index:30;margin:18px 0;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border:1px solid var(--line);border-radius:15px;padding:5px;display:flex;gap:4px;box-shadow:0 6px 15px rgba(20,40,62,.06)}.chapter-tabs button{flex:1;border:0;background:transparent;border-radius:11px;padding:10px 7px;font-weight:850;color:var(--muted);cursor:pointer;font-size:.79rem}.chapter-tabs button.is-active{background:var(--navy);color:#fff}
.chapter-section{display:none}.chapter-section.is-active{display:block}.learning-stack{display:flex;flex-direction:column;gap:17px}.learning-card{background:#fff;border:1px solid var(--line);border-radius:21px;padding:clamp(18px,3vw,30px);box-shadow:0 6px 20px rgba(20,40,62,.05)}.learning-card h2{font-size:1.55rem;letter-spacing:-.03em;color:var(--navy);margin:0 0 13px}.learning-card h3{font-size:1.1rem;color:var(--navy);margin:22px 0 9px}.learning-card p,.learning-card li{color:#425468;line-height:1.7}.learning-card ul,.learning-card ol{padding-left:21px}.learning-card strong{color:var(--ink)}.lead{font-size:1.05rem}.callout{border-left:4px solid var(--blue);background:var(--soft-blue);padding:15px 17px;border-radius:0 14px 14px 0;margin:17px 0}.callout.warning{border-color:var(--orange);background:var(--orange-soft)}.callout.success{border-color:var(--green);background:var(--green-soft)}.callout p{margin:0}.formula{background:#0d2e4c;color:#fff;border-radius:16px;padding:18px 20px;margin:15px 0;font-family:"Segoe UI",sans-serif;font-size:1.15rem;overflow:auto}.formula small{display:block;color:#a9c6df;font-size:.72rem;margin-top:7px}.two-col,.three-col{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.three-col{grid-template-columns:repeat(3,minmax(0,1fr))}.mini-card{border:1px solid var(--line);border-radius:16px;padding:16px;background:#fbfcfd}.mini-card strong{display:block;margin-bottom:7px;color:var(--navy)}.mini-card p{font-size:.84rem;margin:0}.diagram-card{background:#f7f9fb;border:1px solid var(--line);border-radius:18px;padding:16px;overflow:auto}.diagram-card svg{width:100%;height:auto;min-width:500px}.book-task{display:flex;gap:13px;align-items:flex-start;background:#fff8e9;border:1px solid #f2dca9;border-radius:16px;padding:15px}.book-task__icon{width:38px;height:38px;border-radius:12px;background:#fff;color:#a46a11;display:grid;place-items:center;flex:none}.book-task__icon svg{width:21px}.book-task p{margin:0;font-size:.85rem}.book-task p>strong:first-child{display:block;margin-bottom:4px;color:#744b0f}.book-task p strong:not(:first-child){display:inline;margin:0;color:#744b0f}
.help-box{border:1px solid var(--line);border-radius:15px;background:#fbfcfd;margin-top:13px}.help-box summary{cursor:pointer;padding:12px 14px;color:#647486;font-weight:800;font-size:.78rem}.help-box>div{padding:0 14px 14px;color:#4b5d70;font-size:.84rem;line-height:1.6}
.task-card{background:#fff;border:1px solid var(--line);border-radius:21px;overflow:hidden;box-shadow:0 6px 20px rgba(20,40,62,.05)}.task-card__head{padding:18px 22px;background:linear-gradient(135deg,#0b365a,#124d7d);color:#fff;display:flex;gap:14px;align-items:flex-start}.task-number{width:35px;height:35px;border-radius:11px;background:rgba(255,255,255,.14);display:grid;place-items:center;font-weight:950;flex:none}.task-card__head strong{display:block;font-size:1.02rem;margin-bottom:4px}.task-card__head p{margin:0;color:rgba(255,255,255,.75);font-size:.8rem}.task-card__body{padding:22px}.task-card__body p,.task-card__body li{color:#425468;line-height:1.65}.deliverable{border:1px dashed #98b5d1;background:#f5faff;border-radius:15px;padding:15px;margin:15px 0}.deliverable strong{display:block;color:var(--blue);margin-bottom:5px}.task-input,textarea.task-input{width:100%;border:1px solid #cdd8e3;border-radius:13px;padding:12px 13px;background:#fff;color:var(--ink);outline:none;resize:vertical}.task-input:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(23,104,212,.1)}textarea.task-input{min-height:130px}.task-actions{display:flex;flex-wrap:wrap;gap:9px;margin-top:13px}.small-action{border:0;background:#edf4fb;color:var(--blue);padding:9px 11px;border-radius:10px;font-size:.76rem;font-weight:850;cursor:pointer}.small-action.secondary{background:#f1f3f6;color:#667486}.small-action.success{background:var(--green-soft);color:var(--green)}
.sequence-list{display:flex;flex-direction:column;gap:8px;margin:15px 0}.sequence-item{display:grid;grid-template-columns:28px 1fr auto;gap:9px;align-items:center;border:1px solid var(--line);background:#fff;border-radius:13px;padding:10px}.sequence-item span:first-child{width:27px;height:27px;border-radius:8px;background:#edf4fb;color:var(--blue);display:grid;place-items:center;font-size:.72rem;font-weight:900}.sequence-controls{display:flex;gap:4px}.sequence-controls button{width:30px;height:30px;border:0;border-radius:8px;background:#f0f3f6;cursor:pointer}.sequence-feedback{font-size:.8rem;font-weight:800;margin-top:8px}
.msk-map{position:relative;border-radius:18px;overflow:hidden;background:#eee}.msk-map img{width:100%;max-height:450px;object-fit:cover}.msk-pin{position:absolute;width:30px;height:30px;border-radius:50%;border:3px solid #fff;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:.72rem;font-weight:950;cursor:pointer;box-shadow:0 5px 14px rgba(0,0,0,.28)}.msk-pin[data-pin="input"]{left:62%;top:24%}.msk-pin[data-pin="screen"]{left:41%;top:47%}.msk-pin[data-pin="controls"]{left:56%;top:53%}.msk-pin[data-pin="power"]{left:28%;top:57%}.msk-info{margin-top:10px;background:var(--soft-blue);border-radius:14px;padding:13px;font-size:.86rem;color:#3c5870;min-height:54px}
.exercise-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.exercise{border:1px solid var(--line);border-radius:16px;padding:15px;background:#fbfcfd}.exercise strong{display:block;margin-bottom:7px}.answer-row{display:flex;gap:8px;align-items:center;margin-top:10px}.answer-row input{min-width:0;flex:1}.answer-row button{border:0;background:var(--navy);color:#fff;border-radius:10px;padding:10px 12px;font-weight:850;cursor:pointer}.feedback{font-size:.78rem;margin-top:8px;min-height:1.2em}.feedback.good{color:var(--green);font-weight:850}.feedback.bad{color:var(--danger);font-weight:850}
.component-flow{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin:16px 0}.component-box{background:#fff;border:1px solid var(--line);border-radius:13px;padding:12px 14px;min-width:120px;text-align:center;font-size:.82rem;font-weight:850;color:var(--navy)}.flow-arrow{color:#8ba1b4;font-weight:900}.config-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.config-field label{display:block;font-size:.73rem;color:var(--muted);font-weight:800;margin-bottom:5px}.config-field input,.config-field select{width:100%;border:1px solid #ccd7e2;border-radius:11px;padding:10px;background:#fff}.config-result{margin-top:14px;border-radius:15px;padding:15px;background:var(--soft-blue);color:#38566f}.config-result strong{color:var(--navy)}
.decision-table{width:100%;border-collapse:separate;border-spacing:0;overflow:hidden;border:1px solid var(--line);border-radius:15px}.decision-table th,.decision-table td{padding:10px 11px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);font-size:.78rem;text-align:left}.decision-table th{background:#f1f5f8;color:var(--navy)}.decision-table tr:last-child td{border-bottom:0}.decision-table th:last-child,.decision-table td:last-child{border-right:0}.decision-table input{width:100%;border:1px solid #ccd7e2;border-radius:8px;padding:7px}
.completion-card{background:linear-gradient(135deg,#eaf7f0,#f6fbf8);border:1px solid #bfe3cf;border-radius:18px;padding:18px;display:flex;justify-content:space-between;align-items:center;gap:16px}.completion-card p{margin:4px 0 0;color:#507361;font-size:.82rem}.complete-button{border:0;background:var(--green);color:#fff;padding:11px 14px;border-radius:12px;font-weight:900;cursor:pointer;white-space:nowrap}.complete-button.is-done{background:#dceee4;color:var(--green)}

.project-hero{background:linear-gradient(135deg,#0b3456,#0a2742);color:#fff;border-radius:26px;padding:clamp(24px,4vw,42px);display:flex;justify-content:space-between;gap:24px;align-items:flex-end;box-shadow:var(--shadow)}.project-hero h1{font-size:clamp(2.3rem,5vw,4.6rem);letter-spacing:-.05em;line-height:1;margin:8px 0 13px}.project-hero p{max-width:760px;color:rgba(255,255,255,.76);line-height:1.65;margin:0}.project-hero__actions{display:flex;gap:9px;flex-wrap:wrap}.project-layout{display:grid;grid-template-columns:245px minmax(0,1fr);gap:20px;margin-top:22px}.project-nav{position:sticky;top:calc(var(--topbar) + 20px);align-self:start;background:#fff;border:1px solid var(--line);border-radius:19px;padding:10px;display:flex;flex-direction:column;gap:4px}.project-nav button{border:0;background:transparent;border-radius:10px;padding:11px 12px;text-align:left;color:var(--muted);font-size:.8rem;font-weight:780;cursor:pointer}.project-nav button:hover,.project-nav button.is-active{background:var(--soft-blue);color:var(--blue)}.project-page{display:none;background:#fff;border:1px solid var(--line);border-radius:22px;padding:clamp(20px,3.5vw,34px);box-shadow:var(--shadow-sm)}.project-page.is-active{display:block}.project-page h2{font-size:1.8rem;color:var(--navy);margin:0 0 8px}.project-page>p{color:var(--muted);line-height:1.6}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.form-field label{display:block;font-size:.74rem;font-weight:850;color:#526477;margin:0 0 5px}.form-field--full{grid-column:1/-1}.form-field input,.form-field textarea{width:100%;border:1px solid #ccd7e2;border-radius:12px;padding:11px 12px;min-height:42px}.form-field textarea{min-height:120px;resize:vertical}.project-tip{margin-top:15px;background:#fff8e7;border:1px solid #efdbad;border-radius:14px;padding:13px;color:#72521d;font-size:.82rem;line-height:1.55}

.mobile-nav{display:none}
.dialog-backdrop{position:fixed;inset:0;background:rgba(6,23,38,.58);backdrop-filter:blur(4px);z-index:180}
.app-dialog{position:fixed;z-index:200;inset:50% auto auto 50%;transform:translate(-50%,-50%);width:min(720px,calc(100vw - 30px));max-height:88vh;overflow:auto;border:0;border-radius:24px;padding:24px;box-shadow:0 30px 90px rgba(0,0,0,.32);background:#fff}.app-dialog::backdrop{background:transparent}.app-dialog--small{width:min(520px,calc(100vw - 30px))}.dialog-head{display:flex;justify-content:space-between;gap:20px;align-items:flex-start}.dialog-head h2{font-size:1.65rem;color:var(--navy);margin:5px 0}.dialog-close{width:38px;height:38px;border:0;border-radius:12px;background:#eff3f7;color:#566677;font-size:1.4rem;cursor:pointer}.dialog-intro{color:var(--muted);line-height:1.55}.evidence-list,.progress-list{display:flex;flex-direction:column;gap:11px;margin:17px 0}.evidence-card,.progress-row{border:1px solid var(--line);border-radius:16px;padding:15px}.evidence-card__head{display:flex;justify-content:space-between;gap:10px;align-items:center}.evidence-card__head strong{color:var(--navy)}.ready-badge{padding:6px 9px;border-radius:10px;background:#f0f3f6;color:#728092;font-size:.68rem;font-weight:900}.ready-badge.is-ready{background:var(--green-soft);color:var(--green)}.evidence-card ul{margin:10px 0 0;padding-left:18px;color:#526477;font-size:.8rem;line-height:1.6}.evidence-card li.is-done{color:var(--green);font-weight:800}.dialog-note{background:var(--soft-blue);border-radius:14px;padding:13px;color:#3f5d76;font-size:.8rem;line-height:1.55}.dialog-actions{display:flex;justify-content:flex-end;gap:9px;margin-top:17px}.progress-row{display:grid;grid-template-columns:1fr auto;gap:8px;align-items:center}.progress-row strong{display:block;font-size:.85rem}.progress-row small{color:var(--muted)}.progress-row button{border:0;border-radius:10px;padding:7px 9px;font-size:.7rem;font-weight:850;background:#eef3f7;color:#657587;cursor:pointer}.progress-row button.is-done{background:var(--green-soft);color:var(--green)}.info-stack{display:flex;flex-direction:column;gap:10px;margin-top:16px}.info-stack>div{display:flex;gap:12px;align-items:flex-start}.info-stack span{width:28px;height:28px;border-radius:9px;background:var(--soft-blue);color:var(--blue);display:grid;place-items:center;font-weight:900;flex:none}.info-stack p{margin:2px 0;color:#4a5e70;line-height:1.5}

@media(max-width:1280px){.area-grid{grid-template-columns:repeat(3,1fr)}.module-grid{grid-template-columns:repeat(2,1fr)}.area-tile--active{grid-column:span 2}.topnav{display:none}.brand{min-width:0}.house-layout,.sat-layout{grid-template-columns:minmax(0,1fr) 290px}}
@media(max-width:980px){:root{--rail:0px}.rail{display:none}.main{padding-left:0}.topbar__inner{padding:0 15px}.brand__text small{display:none}.house-layout,.sat-layout{grid-template-columns:1fr}.home-panel,.sat-summary{display:grid;grid-template-columns:1fr 1fr;gap:18px}.home-panel__list{margin:0}.summary-actions,.quick-path{margin-top:0}.chapter-shell{grid-template-columns:1fr}.chapter-sidebar{position:static}.chapter-sidebar nav{display:grid;grid-template-columns:repeat(4,1fr)}.chapter-sidebar nav button{text-align:center}.project-layout{grid-template-columns:1fr}.project-nav{position:static;display:grid;grid-template-columns:repeat(4,1fr)}.project-nav button{text-align:center}.area-grid{grid-template-columns:repeat(2,1fr)}.area-tile--active{min-height:300px}.scene-card--house,.sat-stage{aspect-ratio:16/9}}
@media(max-width:720px){body{padding-bottom:72px}.topbar{height:60px}.main{padding-top:60px}.view{padding:18px 13px 38px}.brand__mark{width:36px;height:36px;border-radius:11px}.brand__mark svg{width:24px}.brand__text strong{font-size:.82rem}.topbar__actions .icon-button{display:none}.page-heading{display:block;margin-top:2px}.page-heading h1{font-size:2.7rem}.page-heading p{font-size:.93rem}.heading-card{margin-top:16px;min-width:0;max-width:none}.house-layout,.sat-layout{gap:14px}.scene-card--house,.sat-stage{border-radius:19px;aspect-ratio:auto;overflow:auto;background:#fff}.scene-card--house img,.sat-stage img{width:900px;max-width:none;height:auto}.scene-card--house,.sat-stage{scrollbar-width:thin}.home-panel,.sat-summary{display:flex;border-radius:19px}.area-grid{grid-template-columns:1fr}.area-tile,.area-tile--active{grid-column:auto;grid-row:auto;min-height:230px}.section-title{display:block}.section-title>p{margin-top:8px}.module-grid{grid-template-columns:1fr}.module-card{display:grid;grid-template-columns:115px 1fr}.module-card__image{height:100%;min-height:145px}.module-card__footer{grid-column:2;padding-top:0}.sat-summary h1{font-size:1.8rem}.content-section{margin-top:28px}.chapter-cover{min-height:330px;padding:22px;border-radius:20px}.chapter-cover:after{background:linear-gradient(180deg,rgba(5,29,50,.2),rgba(5,29,50,.92))}.chapter-tabs{top:60px;overflow-x:auto}.chapter-tabs button{min-width:105px}.chapter-sidebar{display:none}.two-col,.three-col,.exercise-grid,.config-grid,.form-grid{grid-template-columns:1fr}.learning-card,.task-card__body{padding:18px}.component-flow{align-items:stretch}.component-box{flex:1 1 40%}.project-hero{display:block;border-radius:20px}.project-hero__actions{margin-top:18px}.project-nav{display:flex;overflow-x:auto;white-space:nowrap}.project-nav button{flex:none}.mobile-nav{position:fixed;z-index:120;left:0;right:0;bottom:0;height:66px;background:rgba(255,255,255,.96);backdrop-filter:blur(13px);border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(5,1fr);padding-bottom:env(safe-area-inset-bottom)}.mobile-nav button{border:0;background:transparent;color:#6c7c8c;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:.65rem;font-weight:800}.mobile-nav button svg{width:20px;height:20px}.mobile-nav button.is-active{color:var(--blue)}.dialog-actions{flex-direction:column}.dialog-actions button{width:100%}.completion-card{display:block}.complete-button{margin-top:12px;width:100%}.project-hero h1{font-size:2.5rem}.project-page{padding:18px}}

@media print{
  .topbar,.rail,.mobile-nav,.breadcrumbs,.project-nav,.project-hero__actions,.dialog-backdrop,.app-dialog{display:none!important}
  body{background:#fff}.main{padding:0}.view{display:none!important;padding:0}.view[data-view="project"]{display:block!important}.project-hero{box-shadow:none;border:0;background:#fff;color:#000;padding:0 0 20px}.project-hero .eyebrow{color:#000}.project-hero p{color:#333}.project-layout{display:block}.project-page{display:block!important;box-shadow:none;border:0;border-radius:0;padding:18px 0;break-after:page}.project-page input,.project-page textarea{border:1px solid #777}.project-tip{border:1px solid #aaa;background:#fff;color:#333}
}



/* V55a · responsive Hauptnavigation und erreichbare Dialogsteuerung */
.rail{
  overflow-y:auto;
  overflow-x:hidden;
  overscroll-behavior:contain;
  scrollbar-width:thin;
  scrollbar-gutter:stable;
}
.app-dialog > .dialog-head{
  position:sticky;
  top:-24px;
  z-index:6;
  margin:-24px -24px 16px;
  padding:20px 24px 14px;
  background:rgba(255,255,255,.98);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
@media(max-width:1600px){
  .topnav{display:none}
  .brand{min-width:0}
}
@media(min-width:721px) and (max-width:980px){
  :root{--rail:86px}
  .rail{display:flex}
  .main{padding-left:var(--rail)}
}
@media(max-width:720px){
  .app-dialog > .dialog-head{
    top:-24px;
    margin:-24px -24px 14px;
    padding:18px 20px 12px;
  }
}

/* V57b · Schutz vor seitlichem Seitenüberlauf ohne zusätzlichen Scroll-Container.
   overflow-x:clip erhält die Sticky-Funktion der Kapitelregister. */
html,body{max-width:100%;overflow-x:clip}
.mobile-nav{max-width:100vw}