:root{color-scheme:dark;--bg:#0b1220;--panel:#111b2b;--panel2:#172337;--side:#0d1625;--border:#29394f;--text:#eaf1ff;--muted:#9aacc5;--primary:#5ec6e8;--accent:#76e3ba;--bad:#fa878d;--warn:#f6bd6b}
*{box-sizing:border-box}body{background:var(--bg);color:var(--text);font:15px/1.55 system-ui,-apple-system,"Segoe UI",sans-serif;margin:0}button,input,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}a{color:var(--primary)}p{margin:.5rem 0 1rem}h1,h2,h3{line-height:1.2;margin:.1rem 0 .9rem;letter-spacing:-.04em}h1{font-size:clamp(26px,4vw,37px)}h2{font-size:23px}h3{font-size:17px}small,.muted{color:var(--muted)}.eyebrow{font-size:11px;letter-spacing:1.7px;font-weight:850;color:var(--primary);text-transform:uppercase}.header{height:73px;position:sticky;top:0;z-index:30;background:#101a2b;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;padding:0 28px;gap:12px}.brand{display:flex;gap:12px;align-items:center;color:inherit;text-decoration:none}.brand-mark{display:grid;place-items:center;width:44px;height:44px;border-radius:14px;color:#071526;font-size:21px;font-weight:900;background:linear-gradient(130deg,#78ecd0,#4a91ef)}.brand-title{font-size:18px;font-weight:900;letter-spacing:-.6px}.brand-sub{font-size:11px;color:#9eb3ce;letter-spacing:1.4px;font-weight:800;text-transform:uppercase}.header-right{display:flex;align-items:center;gap:12px}.shell{display:grid;grid-template-columns:250px minmax(0,1fr);min-height:calc(100vh - 73px)}.sidebar{position:sticky;top:73px;height:calc(100vh - 73px);overflow:auto;background:var(--side);border-right:1px solid var(--border);padding:24px 13px}.side-label{font-size:11px;letter-spacing:1.5px;text-transform:uppercase;color:#728aa8;font-weight:900;padding:11px 13px}.nav-btn{width:100%;border:none;background:transparent;color:#b7c7dc;text-align:left;font-weight:650;padding:13px;border-radius:11px;display:flex;gap:12px;align-items:center}.nav-btn:hover,.nav-btn.active{background:#223450;color:#fff}.main{min-width:0;padding:34px clamp(18px,4vw,50px) 90px;max-width:1400px;width:100%;margin:auto}.lead{color:var(--muted);line-height:1.8;margin-bottom:22px;max-width:820px}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin:22px 0}.card{background:var(--panel);border:1px solid var(--border);border-radius:17px;padding:23px;box-shadow:0 17px 40px #0002;min-width:0}.card h3{margin-bottom:12px}.stat-number{font-size:31px;font-weight:900;color:#a7edf5;line-height:1.2}.stat-caption{font-size:12px;color:var(--muted);font-weight:700;margin-top:8px}.pill{display:inline-block;background:#172c42;border:1px solid #35516e;border-radius:60px;padding:3px 11px;font-size:12px;color:#a9c9e5;font-weight:750}.pill.good{background:#1a3d36;border-color:#3c7665;color:#a4f4c6}.pill.bad{background:#432b37;border-color:#7b4656;color:#ffc0c5}.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(275px,1fr));gap:17px}.btn{border-radius:10px;border:1px solid #3a506b;background:#203049;color:#e5f4ff;padding:10px 15px;font-size:13px;font-weight:800;display:inline-flex;justify-content:center;align-items:center;gap:7px;line-height:1.4;text-decoration:none}.btn:hover{background:#2b415c}.btn.primary{background:linear-gradient(110deg,#56bae0,#7cdec8);border-color:transparent;color:#071926}.btn.primary:hover{filter:brightness(1.07)}.btn.danger{color:#ffbec3;border-color:#845060;background:#462c39}.btn.sm{padding:7px 10px;font-size:12px}.buttons{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:13px}.form-col{display:flex;flex-direction:column;gap:6px}.field-label{font-size:12px;color:#bbcce0;font-weight:800}.field{width:100%;background:#0a1524;border:1px solid #3b506a;border-radius:10px;padding:11px 12px;min-height:44px;color:#f0f8ff;outline:none}.field:focus{border-color:#5ec6e8;box-shadow:0 0 0 2px #5ec6e822}.form-actions{display:flex;align-items:center;gap:11px;margin-top:16px}.section{margin-top:28px}.section-head{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:12px}.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:13px;background:var(--panel)}table{width:100%;border-collapse:collapse;min-width:650px}th,td{text-align:left;padding:12px 15px;border-bottom:1px solid #26384e;vertical-align:middle}th{background:#17283e;color:#b8cce4;font-size:12px;font-weight:850;white-space:nowrap}td{font-size:13px}tr:last-child td{border-bottom:0}tbody tr:hover{background:#16263b}.link-btn{border:0;background:none;color:#8ee4ff;font-weight:750;padding:0;text-align:left}.link-btn:hover{text-decoration:underline}.code{font:12px/1.5 ui-monospace,Consolas,monospace;border:1px solid #35516e;background:#0c2032;color:#a4e2db;border-radius:8px;padding:4px 7px;word-break:break-all}.empty{color:var(--muted);padding:22px;border:1px dashed #344c64;border-radius:12px}.notice{padding:13px 16px;border:1px solid #3c6175;background:#143244;border-radius:12px;color:#b0e6ed;font-size:13px;line-height:1.65;margin:15px 0}.warning{background:#3b2e22;border-color:#836344;color:#ffe4b5}.auth-screen{min-height:100vh;display:grid;place-items:center;padding:35px 16px;background:radial-gradient(ellipse at top right,#15334b,transparent 50%),var(--bg)}.auth-panel{width:100%;max-width:500px}.auth-panel .card{margin-top:22px}.tabs{display:flex;border:1px solid #314c66;border-radius:12px;background:#0b1828;padding:5px;gap:5px;flex-wrap:wrap;margin:19px 0}.tab{border:0;border-radius:8px;background:transparent;color:#a9bdd0;font-size:13px;font-weight:800;padding:9px 11px;flex:1}.tab.active{background:#254360;color:#f1ffff}.auth-panel form{display:grid;gap:12px}.auth-panel .form-col{width:100%}#toast{display:none;position:fixed;z-index:100;bottom:25px;right:25px;max-width:420px;color:#eafcff;background:#1b4050;border:1px solid #528aa4;padding:14px 19px;border-radius:12px;box-shadow:0 14px 40px #0008}#toast.show{display:block}#toast.error{background:#4a2835;border-color:#d0737a;color:#ffe3e5}.learner-row{display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap;border-bottom:1px solid var(--border);padding:16px 0}.learner-row:last-child{border:0}.module-iframe{border:1px solid #314860;border-radius:14px;width:100%;min-height:75vh;height:calc(100vh - 145px);background:#0b1220}.learning-shell{max-width:none!important;padding:14px 18px!important}.study-toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;background:var(--panel);border:1px solid var(--border);border-radius:13px;padding:10px 16px;margin-bottom:12px}.study-title{font-weight:850}.study-frame{position:relative}.study-overlay{position:absolute;inset:0;background:#071526ee;z-index:10;display:grid;place-items:center;text-align:center;border-radius:13px;padding:22px}.study-overlay h2{font-size:28px}.save-status{font-size:12px;color:#9abcc8}.save-status.error{color:#ffc4cc}.chart-bar{background:#233449;border-radius:10px;height:10px;overflow:hidden;margin:6px 0}.chart-bar>div{background:linear-gradient(90deg,#67c5de,#88dfbe);height:100%}.minitext{font-size:12px;color:var(--muted)}.long-list{max-height:430px;overflow:auto}.loading{padding:15vh 20px;text-align:center;color:var(--muted)}.full{grid-column:1/-1}.mb{margin-bottom:15px}.nowrap{white-space:nowrap}.big-note{font-size:13px;line-height:1.7;color:#aac2d7}.highlight{color:#a9eee6}.report-summary{display:flex;flex-wrap:wrap;gap:9px;margin:15px 0 22px}.report-summary .pill{padding:6px 12px}@media(max-width:900px){.shell{grid-template-columns:1fr}.sidebar{position:static;height:auto;display:flex;gap:6px;flex-wrap:wrap;padding:8px;border-bottom:1px solid var(--border)}.side-label{display:none}.nav-btn{width:auto;padding:9px 12px}.main{padding:26px 17px 60px}.header{padding:0 16px}.module-iframe{height:75vh}.header-right>small{display:none}}@media(max-width:520px){.brand-sub{display:none}.header-right .btn{font-size:11px;padding:7px}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.card{padding:17px}table{min-width:550px}}
.study-overlay[hidden]{display:none}
/* Klassenarbeitsmodus – Design passt zum bisherigen PythonKompass */
.exam-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:16px 0 10px}
.exam-nav{display:flex;flex-wrap:wrap;gap:7px;margin:20px 0}
.exam-num{width:39px;height:39px;background:#17283e;color:#aec6dc;border:1px solid #35516e;border-radius:10px;font-weight:800}
.exam-num:hover{background:#285075}.exam-num.current{outline:2px solid var(--primary);background:#28526b;color:#fff}
.exam-num.answered{background:#1d493e;color:#c4ffe4;border-color:#37856c}
.exam-question{margin-top:15px;min-height:300px}.exam-question h2{font-size:21px;letter-spacing:-.015em;max-width:800px}
.exam-code{white-space:pre-wrap;overflow-wrap:anywhere;tab-size:4;font:13px/1.65 ui-monospace,SFMono-Regular,Consolas,monospace;background:#091523;color:#a8e9da;border:1px solid #2b4864;padding:17px;border-radius:10px;margin:11px 0 18px}
.exam-editor{font:14px/1.55 ui-monospace,Consolas,monospace;tab-size:4;min-height:320px;white-space:pre;resize:vertical}
.exam-options{border:0;padding:0;display:grid;gap:10px;margin:16px 0}.exam-option{border:1px solid #344963;background:#0c192a;border-radius:11px;padding:15px;display:flex;gap:13px;align-items:center;cursor:pointer}.exam-option:hover{background:#1a304a}.exam-option:has(input:checked){border-color:#5ec6e8;background:#163a48}.exam-option input{accent-color:#72e9c0;width:17px;height:17px}
.exam-controls{justify-content:space-between;margin:18px 0}.exam-pause{position:fixed;z-index:80;inset:73px 0 0;border-radius:0}
.exam-feedback{margin:14px 0}.exam-feedback summary{cursor:pointer;font-weight:750;display:flex;justify-content:space-between;align-items:center;gap:10px;padding:4px 0}.exam-feedback summary + p{margin-top:14px}
.exam-preview{padding:16px 0;border-top:1px solid var(--border)}.exam-preview:first-child{margin-top:14px}.exam-grade-form{display:grid;gap:12px;grid-template-columns:minmax(100px,180px) 1fr auto;align-items:end;margin-top:14px;padding:14px;background:#14263b;border-radius:10px}
@media(max-width:700px){.exam-grade-form{grid-template-columns:1fr}.exam-controls .btn{flex:1}.exam-num{width:35px;height:35px}}