@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');
:root{color-scheme:dark;--bg-page:#17191c;--bg-card:#23262b;--bg-input:#30343a;--bee-yellow:#ffd43b;--bee-yellow-hover:#ffe075;--bee-yellow-pressed:#e7b920;--bee-yellow-dark-fill:#3c361c;--bee-yellow-soft:#ffde69;--text-primary:#fff;--text-secondary:#cfd4db;--text-tertiary:#9da6b2;--border-input:#858e9c;--border-divider:#444a53;--info:#b9d3ff;--info-bg:#252f44;--success:#a4e3b0;--success-bg:#263b2d;--error:#ffabb4;--font-ui:Inter,system-ui,sans-serif;--font-code:'JetBrains Mono',Consolas,monospace;--radius-card:12px;--radius-input:8px;--radius-small:4px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:0;background:var(--bg-page);color:var(--text-primary);font:16px/1.625 var(--font-ui)}button,input,select,textarea{font:inherit}button{cursor:pointer}a{color:var(--bee-yellow-soft)}a:hover{color:var(--bee-yellow-hover)}p{margin:0 0 12px}h1,h2,h3{line-height:1.3}h1{font-size:32px;margin:0 0 8px}h2{font-size:21px;margin:0 0 12px}h3{font-size:17px;margin:0 0 8px}.muted{color:var(--text-tertiary)}.small{font-size:13px;line-height:1.6}.boot{padding:32px}.visually-hidden{position:absolute;clip-path:inset(50%);width:1px;height:1px;overflow:hidden;white-space:nowrap}.eyebrow{font-size:12px;line-height:18px;font-weight:700;letter-spacing:.065em;color:var(--bee-yellow);margin-bottom:8px}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;border:1px solid transparent;border-radius:8px;padding:12px 16px;font-size:14px;font-weight:700;text-align:center;text-decoration:none;transition:background .15s ease,color .15s ease}.button.primary{background:var(--bee-yellow);color:#17191c}.button.primary:hover{background:var(--bee-yellow-hover);color:#17191c}.button.primary:active{background:var(--bee-yellow-pressed)}.button.secondary{background:var(--bg-input);border-color:var(--border-divider);color:var(--text-primary)}.button.secondary:hover{border-color:var(--bee-yellow);color:var(--bee-yellow)}.button.ghost{color:var(--text-secondary);background:transparent;border-color:var(--border-divider)}.button.full{width:100%}.button:focus-visible,a:focus-visible,button:focus-visible,textarea:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--bee-yellow);outline-offset:3px}.button:disabled{opacity:.65;cursor:not-allowed}.link-button{background:none;border:none;color:var(--bee-yellow-soft);text-decoration:underline;font-size:14px}.notice{padding:12px 16px;margin:16px 0;border-radius:8px;line-height:1.5;font-size:14px}.notice.info{color:var(--info);background:var(--info-bg)}.notice.error,.notice.warn{color:var(--error);background:#422a32}.notice.success{color:var(--success);background:var(--success-bg)}.notice[hidden]{display:none}.card{min-width:0;background:var(--bg-card);border-radius:var(--radius-card);padding:24px}.skip{position:absolute;top:-200px;left:16px;z-index:99;padding:12px;background:var(--bee-yellow);color:#17191c}.skip:focus{top:8px}.topbar{background:var(--bg-card);border-bottom:1px solid var(--border-divider)}.top-inner{max-width:1320px;margin:auto;min-height:72px;display:flex;align-items:center;gap:16px;padding:12px 24px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--bee-yellow);font-weight:800;letter-spacing:.07em}.brand span{font-size:26px}.brand small{font-size:11px;letter-spacing:.08em;color:var(--text-tertiary)}.mode-chip{margin-left:auto;font-size:11px;letter-spacing:.05em;color:var(--text-secondary);background:var(--bg-input);border-radius:8px;padding:8px 12px}.app-layout{display:grid;grid-template-columns:220px minmax(0,1fr);max-width:1320px;padding:24px;gap:24px;margin:auto}.sidebar{align-self:start;display:grid;gap:6px;padding:16px;background:var(--bg-card);border-radius:12px}.nav-item{display:flex;align-items:center;gap:12px;min-height:44px;padding:10px 12px;border-radius:8px;color:var(--text-secondary);text-decoration:none;font-weight:600;font-size:14px}.nav-item:hover{color:#fff;background:var(--bg-input)}.nav-item.selected{color:var(--bee-yellow);background:var(--bee-yellow-dark-fill)}.sidebar-small{font-size:12px;line-height:1.6;color:var(--text-tertiary);border-top:1px solid var(--border-divider);padding-top:16px;margin-top:12px}.main-content{min-width:0;outline:none}.page-heading{margin-bottom:24px}.page-heading p{color:var(--text-secondary);margin-bottom:0}.cards{display:grid;gap:16px}.dashboard-cards{grid-template-columns:1.2fr 1fr;margin-bottom:32px}.feature{border:1px solid #66541e}.next-name{display:block;font-size:21px;line-height:1.4;margin:16px 0}.feature>.button{margin-top:12px}.section-head{display:flex;justify-content:space-between;align-items:center;gap:16px;margin:0 0 16px}.module-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.module-card{border:1px solid var(--border-divider)}.module-card.locked{opacity:.75}.module-top{display:flex;gap:12px;align-items:center;justify-content:space-between;margin-bottom:16px}.module-no{display:grid;place-items:center;min-width:40px;height:40px;border-radius:8px;background:var(--bee-yellow-dark-fill);color:var(--bee-yellow);font-size:14px;font-weight:700}.status{font-size:12px;border-radius:4px;padding:4px 8px;background:var(--bg-input);color:var(--text-secondary)}.status.completed{color:var(--success);background:var(--success-bg)}.status.available{color:var(--bee-yellow);background:var(--bee-yellow-dark-fill)}.module-card h3{font-size:20px}.module-card p{color:var(--text-secondary);font-size:14px}.module-meta{font-size:12px;color:var(--text-tertiary);margin-top:12px}.lesson-items{margin-top:16px;border-top:1px solid var(--border-divider)}.lesson-item{display:grid;grid-template-columns:20px 1fr auto;align-items:center;gap:8px;border-bottom:1px solid var(--border-divider);padding:12px 0;font-size:13px}.tiny-link{font-weight:600}.progress{height:10px;border-radius:12px;background:var(--bg-input);overflow:hidden;margin:20px 0}.progress span{display:block;height:100%;background:var(--bee-yellow);border-radius:12px}.lesson-stack{display:grid;gap:16px}.lesson-stack .card p{color:var(--text-secondary)}.theory-block{margin-top:24px}.theory-block h3{color:var(--text-primary)}.assignment{border-left:4px solid var(--bee-yellow)}.workspace{display:grid;grid-template-columns:1fr 1fr;gap:16px;min-width:0}.editor-box,.result-box{overflow:hidden}.tabs{display:flex;flex-wrap:wrap;gap:4px;border-bottom:1px solid var(--border-divider);padding-bottom:8px}.tab{background:none;color:var(--text-secondary);border:1px solid transparent;padding:8px 12px;border-radius:8px;font:13px var(--font-code)}.tab.active{color:var(--bee-yellow);border-color:var(--bee-yellow);background:var(--bee-yellow-dark-fill)}#editor{display:block;resize:vertical;width:100%;min-height:320px;background:#161a1e;color:#f3f5f7;border:1px solid var(--border-divider);border-radius:8px;margin:12px 0;padding:16px;font:13px/1.65 var(--font-code);tab-size:2;white-space:pre;overflow:auto}#preview-frame{display:block;width:100%;height:350px;background:#fff;border:1px solid var(--border-input);border-radius:8px;margin:12px 0}.save-indicator{color:var(--text-tertiary);font-size:12px}.actions{display:flex;flex-wrap:wrap;gap:12px;margin:16px 0}.hints{background:var(--bg-input);padding:16px 16px 16px 40px;border-radius:8px}.hints li{margin:8px 0}.lesson-footer{display:flex;gap:12px;justify-content:space-between;flex-wrap:wrap}.file-label input{position:absolute;opacity:0;pointer-events:none}.file-label:focus-within{outline:2px solid var(--bee-yellow)}.question{border:1px solid var(--border-divider);border-radius:8px;margin:16px 0;padding:16px}.question legend{padding:0 6px}.option{display:flex;gap:12px;align-items:start;border-radius:6px;padding:10px 8px;cursor:pointer}.option:has(input:checked){background:var(--bee-yellow-dark-fill)}.option input{accent-color:var(--bee-yellow);margin-top:5px}.completion{text-align:center;padding:48px 24px}.login-page{min-height:100svh;display:grid;place-items:center;padding:32px 16px}.login-card{width:min(420px,100%);background:var(--bg-card);padding:24px;border-radius:12px}.login-brand{display:flex;gap:8px;align-items:baseline;margin-bottom:16px}.login-brand strong{color:var(--bee-yellow);font-size:13px;letter-spacing:.08em}.login-brand span{font-size:11px;letter-spacing:.08em;color:var(--text-tertiary)}.login-card h1{font-size:32px;line-height:40px}.guidance{margin:8px 0 24px;line-height:26px;color:var(--text-secondary)}.field-list{display:grid;gap:16px}.field-group{min-width:0}.field-shell{position:relative;display:flex;justify-content:center;flex-direction:column;min-height:64px;padding:8px 16px;border:1px solid var(--border-input);border-radius:8px;background:var(--bg-input)}.field-shell input{order:2;position:absolute;inset:0;width:100%;height:100%;padding:0 16px;border:none;outline:none;background:transparent;color:transparent;caret-color:transparent;opacity:0;font-size:16px;line-height:20px}.field-shell label{order:1;font-size:16px;line-height:20px;color:var(--text-secondary);pointer-events:none}.field-shell:focus-within input,.field-shell input:not(:placeholder-shown){position:static;inset:auto;width:100%;height:20px;padding:0;margin-top:2px;opacity:1;color:var(--text-primary);caret-color:var(--bee-yellow)}.field-shell:focus-within label,.field-shell:has(input:not(:placeholder-shown)) label{font-size:14px;line-height:21px}.field-shell:focus-within::after{content:'';position:absolute;inset:-4px;border:2px solid var(--bee-yellow);border-radius:12px;pointer-events:none}.field-error{margin:8px 0 0;color:var(--error);font-size:14px;line-height:21px;overflow-wrap:anywhere}.field-error:empty{display:none}.password-help{display:flex;justify-content:flex-end;margin:12px 0 24px;font-size:14px}.login-footer{text-align:center;font-size:14px;margin:24px 0}.demo-caption{font-size:12px;text-align:center;color:var(--text-tertiary);margin:20px 0 0}.stack-label{display:block;margin:16px 0;color:var(--text-secondary);font-size:14px;font-weight:600}.stack-label input{display:block;width:100%;min-height:56px;margin-top:8px;background:var(--bg-input);color:#fff;border:1px solid var(--border-input);border-radius:8px;padding:12px 16px;font-size:16px}
@media(max-width:1050px){.workspace,.dashboard-cards{grid-template-columns:1fr}}
@media(max-width:740px){.app-layout{grid-template-columns:1fr;gap:16px;padding:16px}.sidebar{grid-template-columns:repeat(3,minmax(0,1fr))}.nav-item{justify-content:center}.sidebar-small{grid-column:1/-1}.module-grid{grid-template-columns:1fr}.top-inner{padding:12px 16px}.mode-chip{font-size:10px}.brand small{display:none}}
@media(max-width:480px){.card{padding:16px}.login-card{padding:16px}.top-inner{gap:8px}.brand span{font-size:20px}.top-inner>.mode-chip{display:none}.nav-item{font-size:12px;gap:4px;padding:8px 4px}.section-head{flex-wrap:wrap}.page-heading h1{font-size:28px}.actions>.button{width:100%}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}
@media(forced-colors:active){.card,.field-shell,.button,.tab,.question{border:1px solid CanvasText}.status.completed,.status.available,.nav-item.selected{outline:1px solid Highlight}}

.network-status{font-size:12px;color:var(--text-secondary);border:1px solid var(--border-divider);border-radius:8px;padding:6px 10px}


.stay-signed-in{width:100%;margin-top:12px}
.stay-signed-in[hidden]{display:none}

/* Didactische lesuitleg: voorbeeldcode en expliciete stappen vóór de opdracht. */
.guided-learning{border:1px solid var(--border-divider)}
.guided-learning h3{margin:28px 0 12px;color:var(--text-primary);font-size:18px}
.guided-learning h3:first-child{margin-top:0}
.guide-intro{padding:16px;border-radius:8px;background:var(--bg-input);border-left:4px solid var(--bee-yellow);margin:16px 0}
.guide-intro p{margin:0 0 8px}
.guide-intro p:last-child{margin-bottom:0}
.guide-concepts,.guide-explanation,.guide-steps,.guide-questions{margin:0;padding-left:27px;color:var(--text-secondary);line-height:1.75}
.guide-concepts li,.guide-explanation li,.guide-steps li,.guide-questions li{padding-left:4px;margin:0 0 12px;overflow-wrap:anywhere}
.guide-concepts li::marker,.guide-explanation li::marker,.guide-steps li::marker,.guide-questions li::marker{color:var(--bee-yellow);font-weight:700}
.guide-code-header{padding:9px 16px;border:1px solid var(--border-divider);border-bottom:0;border-radius:8px 8px 0 0;background:#30343a;color:var(--bee-yellow);font:600 12px/1.5 var(--font-code)}
.guide-code{margin:0;padding:20px 16px;max-width:100%;overflow-x:auto;white-space:pre;border:1px solid var(--border-divider);border-radius:0 0 8px 8px;background:#111518;color:#e9f2ff;font:14px/1.7 var(--font-code);tab-size:2}
.guide-code code{font:inherit}
.guide-context{color:var(--text-secondary)}
.guide-result,.guide-warning{margin-top:24px;padding:16px;border-radius:8px;background:var(--bg-input)}
.guide-result{border-left:4px solid var(--success)}
.guide-warning{border-left:4px solid var(--bee-yellow)}
.guide-result h3,.guide-warning h3{margin:0 0 8px;font-size:16px}
.guide-result p,.guide-warning p{margin:0}
@media(max-width:480px){.guide-code{font-size:12px;padding:14px 12px}.guided-learning h3{font-size:17px}}
@media(forced-colors:active){.guide-code,.guide-intro,.guide-result,.guide-warning{border:1px solid CanvasText}}

/* Laat beginners direct zien waar ze zijn en hoe ze bij hun opdracht komen. */
.lesson-intro-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:14px 18px;background:var(--bg-card);border:1px solid var(--border-divider);border-radius:10px;color:var(--text-secondary);font-size:14px;font-weight:600}
.lesson-intro-bar .button{margin:0}
#practice-assignment{scroll-margin-top:28px;outline-offset:4px}
#practice-assignment:focus-visible{outline:2px solid var(--bee-yellow)}
#feedback:empty{display:none}
#feedback:not(:empty){margin-top:14px;white-space:pre-wrap}
@media(max-width:480px){.lesson-intro-bar .button{width:100%}}

/* BEE v2.4: isolated JavaScript preview and captured console */
#js-preview-frame{display:block;width:100%;height:270px;background:#fff;border:1px solid var(--border-input);border-radius:8px;margin:12px 0} .js-console{background:#11171b;color:#dbece0;border:1px solid var(--border-divider);border-radius:8px;min-height:115px;max-height:260px;overflow:auto;white-space:pre-wrap;overflow-wrap:anywhere;padding:12px 14px;font:13px/1.6 var(--font-code)}.js-line{padding:4px 0;border-bottom:1px solid #273037}.js-line-error{color:#ffb5be}.js-line-warn{color:#ffda80}.js-run-actions{margin:12px 0}