:root{--navy-900: #0b1f45;--navy-800: #0f2a5c;--navy-600: #1f4fa8;--navy-100: #e6edfa;--bg: #f2f5fb;--card: #ffffff;--text: #14213d;--muted: #5b6785;--line: #dde3f0;--accent: #ff8a1f;--ok: #1d8a5b;--ok-bg: #e5f6ee;--bad: #c0392b;--bad-bg: #fdecea;--warn: #9a6400;--warn-bg: #fff4dc;--de: #1f4fa8;--het: #b5451b;--radius: 18px;--shadow: 0 1px 2px rgba(15, 42, 92, .06), 0 6px 24px rgba(15, 42, 92, .07);color-scheme:light;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;color:var(--text);background:var(--bg);-webkit-text-size-adjust:100%}*{box-sizing:border-box}body{margin:0;background:var(--bg);min-height:100dvh}h1{font-size:1.5rem;margin:0 0 .75rem;letter-spacing:-.01em}h2{font-size:1.1rem;margin:0 0 .75rem}h3{font-size:1rem;margin:1.25rem 0 .5rem}p{line-height:1.5}code{font-size:.85em;background:var(--navy-100);padding:1px 5px;border-radius:6px;word-break:break-all}button,input,select,textarea{font:inherit;color:inherit}a{color:var(--navy-600)}.boot{padding:3rem 1rem;text-align:center;color:var(--muted)}.shell{min-height:100dvh;padding-bottom:calc(72px + env(safe-area-inset-bottom))}.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;padding:calc(10px + env(safe-area-inset-top)) 16px 10px;background:var(--navy-800);color:#fff}.brand{color:#fff;text-decoration:none;font-weight:700;display:flex;align-items:center;gap:10px}.logo{background:#fff;color:var(--navy-800);border-radius:8px;padding:2px 6px;font-size:.8rem;font-weight:800}.topnav{display:none;gap:4px}.topnav a{color:#c9d6f2;text-decoration:none;padding:8px 14px;border-radius:10px;font-weight:600}.topnav a.on,.topnav a:hover{background:#ffffff1f;color:#fff}.tabbar{position:fixed;bottom:0;left:0;right:0;z-index:10;display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}.tabbar a{display:flex;flex-direction:column;align-items:center;gap:2px;padding:8px 0 6px;font-size:.72rem;color:var(--muted);text-decoration:none;font-weight:600;min-height:56px}.tabbar a.on{color:var(--navy-800)}main{max-width:760px;margin:0 auto;padding:16px}@media (min-width: 820px){.topnav{display:flex}.tabbar{display:none}.shell{padding-bottom:32px}main{padding:28px 16px}}.page{display:flex;flex-direction:column;gap:14px}.page-title{margin:4px 0 0}.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px;border:1px solid rgba(15,42,92,.04)}.card.dark{background:linear-gradient(145deg,var(--navy-800),var(--navy-900));color:#fff}.card.note{background:var(--warn-bg);box-shadow:none;border-color:#f3dfb0}.card.note p{margin:.25rem 0}.center{text-align:center;justify-content:center}.row{display:flex;align-items:center}.row.between{justify-content:space-between;gap:8px}.row.gap{gap:10px;margin-top:12px}.row.gap-s{gap:6px}.row.wrap,.wrap{flex-wrap:wrap}.grow{flex:1;min-width:0}.stack{display:flex;flex-direction:column;gap:10px}.muted{color:var(--muted)}.muted-light{color:#b9c7e6}.small{font-size:.85rem}.eyebrow{margin:0;color:#9fb5e6;font-weight:600}.hero h1{font-size:1.7rem}.kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:6px 0 14px}.kpis div{background:#ffffff14;border-radius:14px;padding:10px;display:flex;flex-direction:column}.kpis strong{font-size:1.6rem}.kpis small{font-size:.9rem;opacity:.7}.kpis span{font-size:.75rem;color:#c9d6f2;line-height:1.25}.big-num{font-size:3rem;font-weight:800;margin:.5rem 0 0;color:var(--navy-800)}.big-num small{font-size:1.4rem;color:var(--muted)}.bar{height:8px;border-radius:99px;background:var(--navy-100);overflow:hidden;margin:6px 0}.card.dark .bar{background:#ffffff26}.bar>div{height:100%;background:linear-gradient(90deg,var(--navy-600),#4f86e8);border-radius:99px;transition:width .3s}.card.dark .bar>div{background:var(--accent)}.lesson-list,.vocab-list{list-style:none;margin:0;padding:0}.lesson-row{width:100%;text-align:left;background:none;border:0;border-top:1px solid var(--line);padding:12px 2px;cursor:pointer;display:grid;gap:2px}.lesson-list li:first-child .lesson-row{border-top:0}.lesson-name{font-weight:600}.vocab-list li{display:flex;align-items:center;gap:10px;padding:10px 0;border-top:1px solid var(--line)}.vocab-list li:first-child{border-top:0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:46px;padding:10px 16px;border-radius:12px;border:1px solid var(--line);background:#fff;font-weight:600;cursor:pointer;text-decoration:none;-webkit-tap-highlight-color:transparent;touch-action:manipulation}.btn:active{transform:scale(.98)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn.primary{background:var(--navy-800);color:#fff;border-color:var(--navy-800)}.btn.accent{background:var(--accent);color:#1d1200;border-color:var(--accent)}.btn.success{background:var(--ok);color:#fff;border-color:var(--ok)}.btn.danger{background:#fff;color:var(--bad);border-color:#efc2bc}.btn.big{min-height:52px;font-size:1.05rem;padding:12px 22px}.btn.small{min-height:34px;padding:4px 10px;font-size:.85rem}.btn.file{position:relative;overflow:hidden}.btn.file input{position:absolute;top:0;right:0;bottom:0;left:0;opacity:0;cursor:pointer}.link{background:none;border:0;color:var(--navy-600);font-weight:600;padding:8px 0;cursor:pointer}.icon-btn{background:var(--navy-100);color:var(--navy-800);border:0;border-radius:50%;width:42px;height:42px;display:inline-grid;place-items:center;cursor:pointer;flex:none}.icon-btn.small{width:32px;height:32px;font-size:.9rem}.icon-btn[aria-disabled=true]{opacity:.6}label{display:grid;gap:6px;font-weight:600;font-size:.9rem;margin:10px 0}label.check{display:flex;align-items:center;gap:8px}input,select,textarea{width:100%;border:1.5px solid var(--line);border-radius:12px;padding:12px 14px;background:#fff;font-size:16px}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--navy-600);box-shadow:0 0 0 3px #1f4fa826}label.check input{width:20px;height:20px}textarea{margin-top:10px;font-family:ui-monospace,Menlo,monospace;font-size:14px}.seg{border:0;padding:0;margin:10px 0;display:flex;gap:6px}.seg legend{font-weight:600;font-size:.9rem;margin-bottom:6px;padding:0}.seg button{flex:1 1 auto;min-height:42px;padding:8px 12px;border-radius:10px;border:1.5px solid var(--line);background:#fff;cursor:pointer;font-weight:600;font-size:.9rem}.seg button.on{background:var(--navy-800);color:#fff;border-color:var(--navy-800)}.tabs-inline{display:flex;gap:6px;overflow-x:auto;padding-bottom:2px;scrollbar-width:none}.tabs-inline button{flex:none;border:0;background:#fff;padding:9px 14px;border-radius:99px;font-weight:600;font-size:.9rem;cursor:pointer;box-shadow:var(--shadow)}.tabs-inline button.on{background:var(--navy-800);color:#fff}.filters{display:grid;grid-template-columns:1fr;gap:8px;margin-bottom:8px}@media (min-width: 600px){.filters{grid-template-columns:2fr 1fr 1fr}}.badge{display:inline-block;font-size:.72rem;font-weight:700;padding:3px 8px;border-radius:99px;text-transform:none;white-space:nowrap}.badge.art-de{background:#e3ecfb;color:var(--de)}.badge.art-het{background:#fbe9e1;color:var(--het)}.badge.warn{background:var(--warn-bg);color:var(--warn)}.badge.ok{background:var(--ok-bg);color:var(--ok)}.badge.new{background:var(--accent);color:#1d1200}.badge.demo{background:#f1e4ff;color:#6a2fb0;letter-spacing:.03em}.badge.type{background:var(--navy-100);color:var(--navy-800)}.session-top{min-height:40px}.learn-card{padding:20px}.dir-label{text-align:center;color:var(--muted);font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;font-weight:700;margin:14px 0 0}.prompt{display:flex;align-items:center;justify-content:center;gap:12px;font-size:1.9rem;font-weight:700;text-align:center;margin:14px 0 10px;color:var(--navy-900);word-break:break-word}.prompt.sentence{font-size:1.3rem;font-weight:600;line-height:1.5}.blank{display:inline-block;min-width:3em;border-bottom:2px solid var(--navy-600);color:var(--navy-600);margin:0 4px}.wrong-sentence{text-decoration:underline wavy #e3a29a;text-underline-offset:6px}.answer{display:flex;flex-direction:column;gap:10px;margin-top:12px}.answer input{font-size:18px;padding:14px;text-align:center}.art-choice{display:grid;grid-template-columns:1fr 1fr;gap:12px}.art-choice .btn{min-height:64px;font-size:1.4rem}.art-choice.small .btn{min-height:48px;font-size:1.1rem}.btn.art-de{color:var(--de);border:2px solid #bcd0f3}.btn.art-het{color:var(--het);border:2px solid #f0c8b8}.btn.art-de.on{background:var(--de);color:#fff;border-color:var(--de)}.btn.art-het.on{background:var(--het);color:#fff;border-color:var(--het)}.result{margin-top:14px;border-radius:14px;padding:14px}.result.correct{background:var(--ok-bg)}.result.almost{background:var(--warn-bg)}.result.wrong{background:var(--bad-bg)}.result.neutral{background:var(--navy-100)}.result p{margin:.3rem 0}.verdict{font-weight:800;font-size:1.15rem}.result.correct .verdict{color:var(--ok)}.result.wrong .verdict{color:var(--bad)}.result.almost .verdict{color:var(--warn)}.solution{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:1.1rem;margin:6px 0}.explanation{background:#ffffffb3;border-radius:10px;padding:10px}.chips,.order-line{display:flex;flex-wrap:wrap;gap:8px}.order-line{min-height:56px;padding:10px;border:2px dashed var(--line);border-radius:12px;align-items:center}.chip{min-height:44px;padding:8px 14px;border-radius:10px;border:1.5px solid var(--line);background:#fff;font-size:1.05rem;font-weight:600;cursor:pointer}.chip.on{background:var(--navy-800);color:#fff;border-color:var(--navy-800)}.chip:disabled{opacity:.25}.rule{border-left:3px solid var(--navy-600);padding-left:12px;margin-bottom:16px}.rule h3{margin-top:0}.example{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin:.25rem 0}.rules-list{padding-left:18px;line-height:1.6}.error-box,.ok-box{border-radius:12px;padding:10px 14px}.error-box{background:var(--bad-bg);color:var(--bad)}ul.error-box{padding-left:28px}.ok-box{background:var(--ok-bg);color:var(--ok)}.table-wrap{overflow-x:auto;max-height:50vh;margin:10px 0;border:1px solid var(--line);border-radius:12px}table{border-collapse:collapse;width:100%;font-size:.85rem}th,td{padding:6px 8px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}th{position:sticky;top:0;background:var(--navy-100)}tr.duplicate{background:#f7f7f7;color:var(--muted)}tr.invalid{background:var(--bad-bg)}.toast{position:fixed;left:16px;right:16px;bottom:calc(84px + env(safe-area-inset-bottom));z-index:30;background:var(--navy-900);color:#fff;padding:12px 14px;border-radius:12px;font-size:.9rem;box-shadow:var(--shadow)}.modal-bg{position:fixed;top:0;right:0;bottom:0;left:0;background:#0b1f4573;z-index:20;display:flex;align-items:flex-end;justify-content:center}.modal{width:100%;max-width:560px;max-height:92dvh;overflow-y:auto;border-radius:22px 22px 0 0;padding-bottom:calc(18px + env(safe-area-inset-bottom))}@media (min-width: 600px){.modal-bg{align-items:center}.modal{border-radius:22px}}