:root{--bg:#f3f5f7;--card:#fff;--ink:#17212b;--muted:#64748b;--brand:#16324f;--brand2:#285f88;--line:#dde3e8;--ok:#18794e;--warn:#a16207;--danger:#b42318;--shadow:0 8px 24px rgba(15,23,42,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink)}
button,input,textarea,select{font:inherit}.app-shell{max-width:920px;margin:0 auto;min-height:100vh;background:var(--bg)}
.topbar{position:sticky;top:0;z-index:10;background:linear-gradient(135deg,var(--brand),#0f2236);color:white;padding:18px 18px 14px;display:flex;align-items:center;justify-content:space-between;gap:12px;box-shadow:0 2px 12px rgba(0,0,0,.12)}
.eyebrow{font-size:11px;letter-spacing:.12em;opacity:.78}.eyebrow.dark{color:var(--muted);opacity:1}.topbar h1{margin:3px 0 0;font-size:24px}.install-btn{border:0;border-radius:12px;padding:10px 12px;background:white;color:var(--brand);font-weight:700}
.content{padding:18px 16px 110px}.hero{background:linear-gradient(135deg,#fff,#eef5fb);border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:var(--shadow);margin-bottom:16px}.hero h2{margin:0 0 6px;font-size:22px}.hero p{margin:0;color:var(--muted);line-height:1.45}
.version-badge{display:inline-flex;padding:4px 8px;border-radius:999px;background:#dcecf8;color:var(--brand);font-size:11px;font-weight:800;letter-spacing:.08em;margin-bottom:8px}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:15px;box-shadow:var(--shadow);text-align:left}.card.featured{border:2px solid #86abc8;background:#f4f9fc}.card h3{margin:0 0 8px;font-size:17px}.card p{margin:4px 0;color:var(--muted);line-height:1.4}.metric{font-size:28px;font-weight:800;color:var(--brand)}
.section-title{display:flex;align-items:center;justify-content:space-between;margin:22px 2px 10px;gap:10px}.section-title h2{font-size:19px;margin:0}.pill{display:inline-flex;align-items:center;padding:5px 9px;border-radius:999px;background:#e8f0f7;color:var(--brand);font-size:12px;font-weight:700}.pill.ok{background:#e8f5ee;color:var(--ok)}.pill.warn{background:#fff4db;color:var(--warn)}.pill.muted{background:#eef1f4;color:var(--muted)}
.btn{border:0;border-radius:12px;padding:11px 14px;background:var(--brand);color:white;font-weight:700}.btn.secondary{background:#e8eef4;color:var(--brand)}.btn.ghost{background:transparent;color:var(--brand);border:1px solid var(--line)}
.list,.stack{display:grid;gap:10px}.week{width:100%;text-align:left;background:white;border:1px solid var(--line);border-radius:14px;padding:14px;display:flex;gap:12px;align-items:flex-start}.week.ready{border-color:#8db5d2;background:#f7fbfe}.week-num{min-width:44px;height:44px;border-radius:12px;background:#e8f0f7;color:var(--brand);display:grid;place-items:center;font-weight:800}.week strong{display:block}.week small{color:var(--muted);display:block;margin-top:3px;line-height:1.35}
.search-input{width:100%;border:1px solid var(--line);border-radius:12px;padding:12px 14px;background:#fff;margin-bottom:12px}
.detail-head{display:flex;gap:10px;align-items:center;margin-bottom:12px}.detail-head h2{margin:2px 0}.back{border:0;background:#e7edf3;border-radius:12px;padding:10px 12px;color:var(--brand);font-weight:800;flex:0 0 auto}.detail-grid{display:grid;gap:12px}.detail-block{background:white;border:1px solid var(--line);border-radius:15px;padding:14px}.detail-block.full{grid-column:1/-1}.detail-block h3{margin:0 0 8px}.detail-block h4{margin:18px 0 8px}.detail-block p{line-height:1.5}.detail-block ul,.detail-block ol,.accordion-body ul,.accordion-body ol{margin:8px 0 0 20px;padding:0}.detail-block li,.accordion-body li{margin-bottom:7px;line-height:1.4}
.group-card{background:white;border:1px solid var(--line);border-radius:16px;padding:16px}.group-card h3{margin:0 0 4px}.row-between{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}.status-row{display:flex;justify-content:space-between;gap:10px;align-items:center;padding:12px 0;border-bottom:1px solid var(--line)}.status-row:last-child{border-bottom:0}.status-select,.date-input{border:1px solid var(--line);background:white;border-radius:10px;padding:8px;max-width:170px}.status-select.ok{border-color:#8ac5a5;background:#f0faf4}.status-select.warn{border-color:#d8bc7b;background:#fffaf0}.status-select.muted{background:#fff}.status-select.blank{background:#f7f8fa;color:var(--muted)}
.task-form{display:grid;grid-template-columns:1fr auto;gap:8px;margin-bottom:12px}.task-input{width:100%;border:1px solid var(--line);border-radius:12px;padding:12px;background:white}.task-item{display:flex;align-items:center;gap:10px;background:white;border:1px solid var(--line);border-radius:12px;padding:12px}.task-item.done .task-text{text-decoration:line-through;color:var(--muted)}.task-text{flex:1}.delete{border:0;background:#fef0ef;color:var(--danger);border-radius:10px;padding:8px 10px}
.note{width:100%;min-height:110px;border:1px solid var(--line);border-radius:12px;padding:12px;resize:vertical;background:#fff}.note.small{min-height:76px}.mini{font-size:12px;color:var(--muted)}.mini.tight{margin:3px 0 0}.big-question{font-size:18px;font-weight:800;color:var(--brand)}
.bottom-nav{position:fixed;left:50%;transform:translateX(-50%);bottom:0;width:min(920px,100%);display:grid;grid-template-columns:repeat(5,1fr);background:white;border-top:1px solid var(--line);padding:8px 6px calc(8px + env(safe-area-inset-bottom));z-index:20}.nav-btn{border:0;background:transparent;color:var(--muted);display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 2px;border-radius:10px}.nav-btn span{font-size:21px}.nav-btn small{font-size:11px}.nav-btn.active{color:var(--brand);background:#eef4f8;font-weight:800}
.notice{border-left:4px solid var(--warn);background:#fff8e8;padding:12px 14px;border-radius:10px;margin-bottom:12px;line-height:1.45}.notice.success{border-left-color:var(--ok);background:#eef9f3}.callout{background:#eef5fb;border-radius:10px;padding:10px 12px;line-height:1.45;margin:8px 0}.callout.warning{background:#fff7e6;border-left:4px solid var(--warn)}.backup-actions{display:flex;flex-wrap:wrap;gap:8px}.file-label{display:inline-flex;align-items:center;cursor:pointer}.file-label input{display:none}
.tab-strip{display:flex;gap:8px;overflow-x:auto;padding:4px 0 12px;scrollbar-width:none}.tab-strip::-webkit-scrollbar{display:none}.tab-btn{white-space:nowrap;border:1px solid var(--line);background:#fff;color:var(--muted);border-radius:999px;padding:9px 12px;font-weight:700}.tab-btn.active{background:var(--brand);color:white;border-color:var(--brand)}
.timeline{display:grid;gap:10px}.timeline-item{display:grid;grid-template-columns:72px 1fr;gap:10px;align-items:start}.time{background:var(--brand);color:white;border-radius:12px;padding:9px 7px;text-align:center;font-size:12px;font-weight:800;position:sticky;top:88px}.timeline-body{background:#fff;border:1px solid var(--line);border-radius:14px;padding:13px}.timeline-body h3{margin:0 0 6px;font-size:16px}.timeline-body p{margin:7px 0;line-height:1.45}
.accordion{background:white;border:1px solid var(--line);border-radius:14px;overflow:hidden}.accordion summary{list-style:none;cursor:pointer;padding:14px;display:flex;justify-content:space-between;gap:12px;align-items:center}.accordion summary::-webkit-details-marker{display:none}.accordion[open] summary{background:#eef5fb}.accordion-body{padding:14px;border-top:1px solid var(--line)}.accordion-body h4{margin:18px 0 8px}.card-text{white-space:pre-wrap;background:#f7f9fb;border:1px solid var(--line);border-radius:12px;padding:11px;line-height:1.45}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px}table{width:100%;border-collapse:collapse;background:white;min-width:560px}th,td{text-align:left;padding:10px;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.35}th{background:#f3f6f8;color:var(--brand)}tr:last-child td{border-bottom:0}
.progress-list{display:grid;gap:10px}.progress-row{display:flex;justify-content:space-between;gap:10px;align-items:flex-start;padding:12px 0;border-bottom:1px solid var(--line)}.progress-row:last-child{border-bottom:0}.progress-controls{display:flex;gap:7px;align-items:center;flex-wrap:wrap;justify-content:flex-end}.group-note{width:100%;margin-top:8px;border:1px solid var(--line);border-radius:10px;padding:9px;background:#fff;min-height:60px;resize:vertical}.toast{position:fixed;left:50%;bottom:88px;transform:translate(-50%,20px);background:#17212b;color:white;padding:10px 14px;border-radius:999px;opacity:0;pointer-events:none;transition:.2s;z-index:50;font-size:13px}.toast.show{opacity:1;transform:translate(-50%,0)}
.eval-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px;margin-bottom:10px}.eval-card h3{margin:0 0 4px}.case{border-top:1px solid var(--line);padding:10px 0}.case:first-child{border-top:0}.case p{margin:5px 0;line-height:1.42}.two-col{display:grid;gap:12px}.nowrap{white-space:nowrap}
@media(max-width:520px){.progress-row{align-items:flex-start;flex-direction:column}.progress-controls{width:100%;justify-content:flex-start}.status-select,.date-input{max-width:none;flex:1}.timeline-item{grid-template-columns:64px 1fr}.row-between{align-items:flex-start}.detail-head{align-items:flex-start}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:700px){.content{padding-left:24px;padding-right:24px}.grid{grid-template-columns:repeat(4,minmax(0,1fr))}.detail-grid,.two-col{grid-template-columns:repeat(2,minmax(0,1fr))}.topbar{padding-left:24px;padding-right:24px}}

/* V4: voorbereiding + lesmodus */
.pill.prep{background:#e8efff;color:#3559a6}.status-select.prep,.status-dot.prep{background:#f0f4ff;border-color:#a9b9e8;color:#3559a6}.week-main{flex:1;min-width:0}.status-strip{display:flex;flex-wrap:wrap;gap:5px;margin-top:8px}.status-dot{display:inline-flex;border:1px solid var(--line);border-radius:999px;padding:3px 7px;font-size:10px;background:#f7f8fa;color:var(--muted)}.status-dot.ok{background:#eef9f3;color:var(--ok);border-color:#a7d5bc}.status-dot.warn{background:#fff7e6;color:var(--warn);border-color:#e5c982}.status-dot.blank{background:#f7f8fa;color:var(--muted)}.status-dot.muted{background:#eef1f4;color:var(--muted)}
.prep-panel{background:white;border:1px solid var(--line);border-radius:18px;padding:15px;box-shadow:var(--shadow)}.prep-selectors{display:grid;grid-template-columns:1fr 1fr;gap:10px}.prep-selectors label{font-size:12px;color:var(--muted);font-weight:700}.prep-selectors select{display:block;width:100%;max-width:none;margin-top:5px}.prep-title{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;margin:16px 0 10px}.prep-title p{margin:4px 0 0}.prep-checklist{display:grid;gap:7px}.prep-check{display:flex;gap:10px;align-items:flex-start;border:1px solid var(--line);border-radius:12px;padding:10px;background:#fff;line-height:1.35}.prep-check input{margin-top:3px;transform:scale(1.15)}.prep-check.done{background:#f0faf4;border-color:#abd4bc}.prep-check.done span{text-decoration:line-through;color:var(--muted)}.action-row{display:flex;gap:9px;margin-top:13px}.action-row .btn{flex:1}.lesson-launch{background:#0d6b52}.group-summary{width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;padding:13px 14px;display:flex;justify-content:space-between;align-items:center;text-align:left}.group-summary small{display:block;color:var(--muted);margin-top:3px}.week-actions{display:flex;gap:8px;margin:0 0 12px}.week-actions .btn{flex:1}.group-focus{margin:12px 0;padding:11px;background:#f5f8fb;border-radius:12px;display:grid;grid-template-columns:1fr auto;gap:4px 10px;align-items:center}.group-focus span{font-size:11px;color:var(--muted);grid-column:1}.group-focus strong{grid-column:1}.group-focus .btn{grid-column:2;grid-row:1/3}
body.lesson-active{background:#0d2033}.lesson-active .topbar{display:none}.lesson-active .content{padding:0;max-width:none}.lesson-shell{min-height:100vh;background:#0d2033;color:#fff;padding:16px 14px calc(22px + env(safe-area-inset-bottom))}.lesson-top{display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:center}.lesson-top h2{margin:2px 0 0;font-size:21px}.darkbtn{background:#193650;color:white}.lesson-stepcount{background:#183b58;border-radius:999px;padding:7px 10px;font-weight:800;font-size:12px}.lesson-progress{height:5px;background:#27445c;border-radius:999px;margin:14px 0;overflow:hidden}.lesson-progress span{display:block;height:100%;background:#64c8a5}.lesson-phase{background:#fff;color:var(--ink);border-radius:18px;padding:16px;box-shadow:0 12px 30px rgba(0,0,0,.22)}.lesson-phase h3{font-size:26px;margin:7px 0 2px}.pill.light{background:#e9f2f7;color:var(--brand)}.phase-done{display:flex;gap:6px;align-items:center;font-size:13px;font-weight:700}.phase-done input{transform:scale(1.25)}.timer-card{margin:16px 0;background:#102b41;border:1px solid #31516b;border-radius:18px;padding:16px;text-align:center}.timer{font-variant-numeric:tabular-nums;font-size:54px;font-weight:900;letter-spacing:.03em}.timer-track{height:7px;background:#294a62;border-radius:999px;overflow:hidden;margin:8px 0 14px}.timer-track span{display:block;height:100%;background:#64c8a5}.timer-actions{display:flex;gap:8px;justify-content:center}.lightghost{color:white;border-color:#4f6b80}.lesson-instruction,.lesson-result{border-radius:16px;padding:15px;margin:10px 0}.lesson-instruction span{font-size:11px;font-weight:900;letter-spacing:.08em}.lesson-instruction p,.lesson-result p{font-size:18px;line-height:1.45;margin:7px 0 0}.lesson-instruction.teacher{background:#eaf2fb;color:#12283c}.lesson-instruction.student{background:#eef8f3;color:#16372d}.lesson-result{background:#17364f;color:#fff;border:1px solid #3e5c73}.lesson-note{background:#fff;color:var(--ink);margin-top:12px}.lesson-nav{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}.lesson-nav .btn{min-height:50px}.lesson-nav .btn:disabled{opacity:.35}.btn.finish{background:#18794e}.lesson-footer{text-align:center;color:#adc0cf;margin-bottom:0}.lighttext{color:#64748b}
@media(max-width:520px){.prep-selectors{grid-template-columns:1fr}.timer{font-size:48px}.lesson-top{grid-template-columns:auto 1fr}.lesson-stepcount{grid-column:1/-1;justify-self:end;margin-top:-6px}.lesson-instruction p,.lesson-result p{font-size:17px}}