/* The Genius Project: Members Hub shared styles
   Used by teen-genius.html, preteen-genius.html and their week subpages.
   Two lab skins: .lab (dark, teens) and .play-lab (light, pre-teens). */

.eyebrow-dot{display:inline-flex;align-items:center;gap:8px;font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-deep,#007b93);}
.eyebrow-dot::before{content:'';display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent);flex-shrink:0;}
.page-header h1{font-size:clamp(36px,5.5vw,68px);font-weight:800;letter-spacing:-0.04em;}

/* ===== Hub navigation pills (sticky) ===== */
.week-nav{position:sticky;top:64px;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:12px 0;}
.week-nav .container{display:flex;gap:12px;flex-wrap:wrap;}
.week-pill{display:inline-block;padding:9px 20px;border-radius:100px;border:1px solid var(--line-strong);font-size:13px;font-weight:600;color:var(--ink-mid);text-decoration:none;transition:all .2s;}
.week-pill:hover{background:var(--panel-2);}
.week-pill.hot,.week-pill.active{background:var(--ink);color:#fff;border-color:var(--ink);}

/* ===== Schedule strip ===== */
.schedule-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin-top:36px;}
.schedule-card{background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:26px 26px;}
.schedule-card .day{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:16px;color:var(--ink);}
.schedule-card .mode{font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;margin:8px 0 10px;}
.schedule-card .mode.virtual{color:var(--accent);}
.schedule-card .mode.person{color:var(--pink);}
.schedule-card .mode.mission{color:var(--warm);}
.schedule-card p{font-size:14px;color:var(--ink-mid);margin:0;line-height:1.65;}

/* ===== Hub week cards (landing pages) ===== */
.hub-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;margin-top:40px;}
.hub-card{display:flex;flex-direction:column;background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:32px 30px;text-decoration:none;transition:transform .2s,box-shadow .2s;}
.hub-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(13,27,75,.12);}
.hub-card .hub-week{font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-bottom:12px;}
.hub-card h3{font-family:'Space Grotesk',sans-serif;font-size:21px;color:var(--ink);margin-bottom:12px;line-height:1.3;}
.hub-card p{font-size:14.5px;color:var(--ink-mid);line-height:1.7;margin-bottom:18px;}
.hub-card ul{margin:0 0 22px;padding-left:18px;font-size:13.5px;color:var(--ink-mid);line-height:1.9;}
.hub-card .hub-go{margin-top:auto;font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:14px;color:var(--ink);}
.hub-card.quiz-card{background:var(--ink);}
.hub-card.quiz-card h3,.hub-card.quiz-card .hub-go{color:#fff;}
.hub-card.quiz-card p,.hub-card.quiz-card ul{color:#aab4dd;}
.hub-card.quiz-card .hub-week{color:var(--warm);}

/* ===== Week page structure ===== */
.week-tag{display:inline-flex;align-items:center;gap:10px;background:var(--ink);color:#fff;border-radius:100px;padding:9px 22px;font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:14px;margin-bottom:18px;}
.week-tag .theme{color:var(--accent);font-weight:600;}
.week-intro{max-width:760px;color:var(--ink-mid);font-size:17px;line-height:1.8;margin-bottom:16px;}
.kids-copy{font-size:18px;line-height:1.8;color:var(--ink-mid);}

.session-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:20px;margin:44px 0 12px;}
.session-card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:28px 26px;}
.session-card .when{font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--accent);margin-bottom:10px;}
.session-card .when.person{color:var(--pink);}
.session-card h4{font-family:'Space Grotesk',sans-serif;font-size:17px;color:var(--ink);margin-bottom:10px;}
.session-card p{font-size:14px;color:var(--ink-mid);line-height:1.7;margin:0;}
.session-card a{color:var(--accent-2);font-weight:600;text-decoration:underline;text-decoration-color:var(--accent);}

/* Section divider used between interactives for breathing room */
.lab-section{padding:34px 0 6px;}

/* ===== Dark lab (teens) ===== */
.lab{background:#0d1b4b;border-radius:24px;padding:40px clamp(22px,4vw,48px) 44px;margin:48px 0;color:#e7ecff;overflow:hidden;}
.lab h3{font-family:'Space Grotesk',sans-serif;font-size:21px;color:#fff;margin-bottom:12px;display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
.lab .lab-kind{font-size:10.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;background:rgba(43,240,200,.15);color:#2bf0c8;border-radius:100px;padding:6px 14px;}
.lab p.lab-lead{font-size:15px;color:#aab4dd;line-height:1.75;max-width:740px;margin-bottom:22px;}
.lab .viz-stage{background:#101f57;border:1px solid rgba(255,255,255,.08);border-radius:16px;padding:14px;overflow-x:auto;}
.lab svg{display:block;margin:0 auto;max-width:100%;height:auto;}
.lab-controls{display:flex;gap:16px;flex-wrap:wrap;align-items:center;margin-top:24px;}
.lab-controls label{font-size:13.5px;color:#aab4dd;display:flex;align-items:center;gap:10px;}
.lab-controls input[type=range]{accent-color:#2bf0c8;width:160px;}
.lab-btn{background:#2bf0c8;color:#0d1b4b;border:none;border-radius:100px;padding:12px 26px;font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:14px;cursor:pointer;transition:transform .15s;}
.lab-btn:hover{transform:translateY(-1px);}
.lab-btn.ghost{background:transparent;color:#2bf0c8;border:1px solid rgba(43,240,200,.5);}
.lab-btn:disabled{opacity:.45;cursor:not-allowed;transform:none;}
.lab-status{font-family:'Space Grotesk',sans-serif;font-size:14.5px;color:#ffc800;min-height:24px;margin-top:18px;line-height:1.6;}

/* How-to-play steps: dark skin */
.lab .howto{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:20px 24px;margin:0 0 26px;max-width:740px;}
.lab .howto h5{font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:#2bf0c8;margin:0 0 10px;}
.lab .howto ol{margin:0;padding-left:20px;font-size:14px;color:#cdd6f4;line-height:1.7;}
.lab .howto li{margin-bottom:8px;}
.lab .howto li:last-child{margin-bottom:0;}
/* The global `strong, b { color: var(--ink) }` rule paints bold words navy,
   which vanishes on .lab's dark navy background. This runs on both the
   teen-genius hub week pages (which load only style.css + hub.css) and the
   lesson pages, so it must live here in hub.css. Keep bold words and inline
   links bright on every dark .lab panel. */
.lab strong, .lab b, .lab .howto strong, .lab p.lab-lead strong { color:#fff; }
.lab a:not(.lab-btn):not(.btn){ color:#7ff0d6; font-weight:700; text-decoration:underline; }
.lab a:not(.lab-btn):not(.btn):hover{ color:#a9f6e4; }

/* ===== Light lab (pre-teens) ===== */
.play-lab{background:linear-gradient(135deg,#eaf7ff 0%,#fff7e0 100%);border:2px solid var(--line-strong);border-radius:28px;padding:38px clamp(22px,4vw,44px) 42px;margin:48px 0;}
.play-lab h3{font-family:'Syne',sans-serif;font-size:clamp(20px,3vw,26px);color:var(--ink);margin-bottom:12px;display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
.play-lab .lab-kind{font-size:10.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;background:var(--ink);color:#2bf0c8;border-radius:100px;padding:6px 14px;}
.play-lab p.lab-lead{font-size:17px;color:var(--ink-mid);line-height:1.75;max-width:720px;margin-bottom:22px;}
.play-lab .viz-stage{background:#fff;border:2px solid var(--line);border-radius:18px;padding:14px;overflow-x:auto;}
.play-lab svg{display:block;margin:0 auto;max-width:100%;height:auto;}
.play-lab .lab-controls label{font-size:15px;font-weight:600;color:var(--ink);}
.play-lab .lab-controls input[type=range]{accent-color:#00cfe8;width:190px;height:28px;}
.play-lab .lab-status{color:var(--ink);font-weight:600;font-size:16px;}
.big-btn{background:var(--ink);color:#fff;border:none;border-radius:100px;padding:15px 30px;font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:16px;cursor:pointer;transition:transform .15s;}
.big-btn:hover{transform:translateY(-2px) scale(1.02);}
.big-btn.sun{background:var(--warm);color:var(--ink);}
.big-btn.ghost{background:#fff;color:var(--ink);border:2px solid var(--line-strong);}
.big-btn:disabled{opacity:.5;cursor:not-allowed;transform:none;}

/* How-to-play steps: light skin */
.play-lab .howto{background:#fff;border:2px dashed var(--line-strong);border-radius:16px;padding:20px 24px;margin:0 0 26px;max-width:720px;}
.play-lab .howto h5{font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-2);margin:0 0 10px;}
.play-lab .howto ol{margin:0;padding-left:22px;font-size:16px;color:var(--ink-mid);line-height:1.75;}
.play-lab .howto li{margin-bottom:8px;}
.play-lab .howto li:last-child{margin-bottom:0;}

/* ===== Drag cards & drop zones ===== */
.game-cards{display:flex;flex-wrap:wrap;gap:14px;margin:18px 0;min-height:60px;}
.drag-card{background:#fff;color:var(--ink);border-radius:14px;padding:13px 18px;font-size:13.5px;font-weight:600;cursor:grab;user-select:none;touch-action:none;box-shadow:0 4px 14px rgba(0,0,0,.22);max-width:260px;line-height:1.45;}
.drag-card.dragging{opacity:.92;cursor:grabbing;box-shadow:0 14px 30px rgba(0,0,0,.45);}
.play-lab .drag-card{border:3px solid var(--line-strong);border-radius:18px;font-size:30px;text-align:center;box-shadow:none;line-height:1.2;}
.play-lab .drag-card small{display:block;font-size:12px;font-weight:700;color:var(--ink-mid);}
.drop-zones{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:22px;}
@media(max-width:640px){.drop-zones{grid-template-columns:1fr;}}
.drop-zone{border:2px dashed rgba(255,255,255,.25);border-radius:18px;min-height:150px;padding:18px;transition:border-color .2s,background .2s;}
.drop-zone.over{border-color:#2bf0c8;background:rgba(43,240,200,.08);}
.drop-zone h5{font-family:'Space Grotesk',sans-serif;font-size:15px;color:#fff;margin-bottom:12px;}
.drop-zone .drag-card{margin:6px 6px 0 0;display:inline-block;}
.play-lab .drop-zone{border:3px dashed var(--line-strong);border-radius:20px;}
.play-lab .drop-zone h5{color:var(--ink);font-size:17px;}
.play-lab .drop-zone.sea{background:#e8f6ff;}
.play-lab .drop-zone.land{background:#f2fbe9;}
.play-lab .drop-zone.over{border-color:#00cfe8;transform:scale(1.01);}
.drag-card.right{outline:2px solid #2bf0c8;}
.drag-card.wrong{outline:2px solid #ff6a55;}
.play-lab .drag-card.right{outline:none;border-color:#18c07a;background:#e7fbf1;}
.play-lab .drag-card.wrong{outline:none;border-color:#ff6a55;background:#ffefec;animation:wiggle .4s;}
@keyframes wiggle{25%{transform:rotate(-6deg)}75%{transform:rotate(6deg)}}

/* ===== Chips ===== */
.chip-row{display:flex;flex-wrap:wrap;gap:12px;margin:18px 0;}
.pick-chip{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.2);color:#e7ecff;border-radius:100px;padding:11px 20px;font-size:13.5px;font-weight:600;cursor:pointer;user-select:none;transition:all .15s;}
.pick-chip:hover{border-color:#2bf0c8;}
.pick-chip.picked{background:#2bf0c8;color:#0d1b4b;border-color:#2bf0c8;}
.pick-chip.right{background:#2bf0c8;color:#0d1b4b;border-color:#2bf0c8;}
.pick-chip.wrong{background:#ff6a55;color:#fff;border-color:#ff6a55;}
.play-lab .pick-chip{background:#fff;border:3px solid var(--line-strong);color:var(--ink);font-size:22px;padding:12px 22px;}
.play-lab .pick-chip:hover{transform:scale(1.05);border-color:var(--line-strong);}
.play-lab .pick-chip.picked{border-color:#00cfe8;background:#e6f9ff;color:var(--ink);}
.play-lab .pick-chip.right{border-color:#18c07a;background:#e7fbf1;color:var(--ink);}
.play-lab .pick-chip.wrong{border-color:#ff6a55;background:#ffefec;color:var(--ink);animation:wiggle .4s;}

/* ===== Ordered slots (pipeline game) ===== */
.slot-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;margin-top:22px;}
.slot{border:2px dashed rgba(255,255,255,.25);border-radius:12px;min-height:70px;padding:10px;text-align:center;}
.slot .slot-num{font-size:10px;font-weight:700;letter-spacing:.1em;color:#aab4dd;display:block;margin-bottom:6px;}
.slot.over{border-color:#2bf0c8;background:rgba(43,240,200,.08);}
.slot .drag-card{max-width:none;width:100%;box-sizing:border-box;}

/* ===== Fruit tap grid ===== */
.fruit-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(80px,1fr));gap:16px;margin:20px 0;}
.fruit-tile{font-size:40px;background:#fff;border:3px solid var(--line);border-radius:18px;padding:16px 0;text-align:center;cursor:pointer;user-select:none;transition:all .15s;line-height:1;}
.fruit-tile:hover{transform:scale(1.06);}
.fruit-tile.tapped{border-color:#00cfe8;background:#e6f9ff;box-shadow:0 6px 16px rgba(0,207,232,.25);}
.fruit-tile.right{border-color:#18c07a;background:#e7fbf1;}
.fruit-tile.wrong{border-color:#ff6a55;background:#ffefec;animation:wiggle .4s;}

/* ===== Match pairs ===== */
.match-cols{display:grid;grid-template-columns:1fr 1fr;gap:18px;max-width:680px;}
.match-item{background:#fff;border:3px solid var(--line-strong);border-radius:16px;padding:16px;font-size:16px;font-weight:600;color:var(--ink);cursor:pointer;text-align:center;transition:all .15s;}
.match-item .big{font-size:30px;display:block;margin-bottom:4px;}
.match-item:hover{transform:scale(1.03);}
.match-item.sel{border-color:#00cfe8;background:#e6f9ff;}
.match-item.done{border-color:#18c07a;background:#e7fbf1;cursor:default;opacity:.85;}
.match-item.no{animation:wiggle .4s;border-color:#ff6a55;}

/* ===== Decision-tree answer buttons ===== */
.tree-answers{display:flex;gap:16px;flex-wrap:wrap;margin-top:22px;}

/* ===== Parent learn-along ===== */
.parent-box{background:var(--panel-2);border-left:6px solid var(--accent);border-radius:0 20px 20px 0;padding:30px 32px;margin:48px 0;}
.parent-box h4{font-family:'Space Grotesk',sans-serif;font-size:17px;color:var(--ink);margin-bottom:12px;}
.parent-box p,.parent-box li{font-size:14.5px;color:var(--ink-mid);line-height:1.75;}
.parent-box ul{padding-left:18px;margin:10px 0 0;}
.parent-box li{margin-bottom:8px;}
.parent-box strong{color:var(--ink);}

/* ===== Assignments / submissions ===== */
.submit-box{background:linear-gradient(120deg,rgba(0,207,232,.10),rgba(255,200,0,.10));border:1px solid var(--line-strong);border-radius:20px;padding:32px 32px;margin:48px 0;}
.submit-box h4{font-family:'Space Grotesk',sans-serif;font-size:18px;color:var(--ink);margin-bottom:14px;}
.submit-box p{font-size:15px;color:var(--ink-mid);line-height:1.75;margin-bottom:16px;}
.submit-box .btn{margin:6px 10px 6px 0;}
.prize{display:inline-block;background:var(--warm);color:var(--ink);border-radius:100px;padding:4px 12px;font-size:11.5px;font-weight:700;letter-spacing:.05em;}

/* ===== Prev / next week footer nav ===== */
.week-pager{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin:56px 0 8px;}
.week-pager a{display:inline-flex;align-items:center;gap:8px;font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:14.5px;color:var(--ink);text-decoration:none;border:1px solid var(--line-strong);border-radius:100px;padding:12px 24px;transition:all .2s;}
.week-pager a:hover{background:var(--ink);color:#fff;border-color:var(--ink);}

/* ===== Quiz ===== */
.quiz-shell{border-radius:24px;padding:40px clamp(22px,4vw,48px);}
.quiz-shell.dark{background:#0d1b4b;color:#e7ecff;}
.quiz-shell.light{background:linear-gradient(135deg,#eaf7ff,#fff1f0);border:2px solid var(--line-strong);}
.quiz-progress{font-size:12px;letter-spacing:.1em;text-transform:uppercase;font-weight:700;}
.quiz-shell.dark .quiz-progress{color:#2bf0c8;}
.quiz-shell.light .quiz-progress{color:var(--accent);}
.quiz-stars{font-size:22px;letter-spacing:4px;min-height:30px;margin-top:8px;}
.quiz-q{font-family:'Space Grotesk',sans-serif;font-size:20px;margin:14px 0 24px;line-height:1.55;}
.quiz-shell.dark .quiz-q{color:#fff;}
.quiz-shell.light .quiz-q{color:var(--ink);font-size:22px;}
.quiz-opts{display:grid;gap:14px;max-width:680px;}
.quiz-opt{border-radius:14px;padding:16px 20px;font-size:15px;cursor:pointer;text-align:left;transition:all .15s;width:100%;}
.quiz-shell.dark .quiz-opt{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.18);color:#e7ecff;}
.quiz-shell.dark .quiz-opt:hover{border-color:#2bf0c8;}
.quiz-shell.dark .quiz-opt.right{background:rgba(43,240,200,.2);border-color:#2bf0c8;}
.quiz-shell.dark .quiz-opt.wrong{background:rgba(255,106,85,.2);border-color:#ff6a55;}
.quiz-shell.light .quiz-opt{background:#fff;border:3px solid var(--line-strong);color:var(--ink);font-size:18px;font-weight:600;}
.quiz-shell.light .quiz-opt:hover{transform:scale(1.02);border-color:var(--accent);}
.quiz-shell.light .quiz-opt.right{border-color:#18c07a;background:#e7fbf1;}
.quiz-shell.light .quiz-opt.wrong{border-color:#ff6a55;background:#ffefec;animation:wiggle .4s;}
.quiz-explain{font-size:14px;line-height:1.7;margin-top:18px;min-height:22px;}
.quiz-shell.dark .quiz-explain{color:#aab4dd;}
.quiz-shell.light .quiz-explain{color:var(--ink-mid);font-size:15.5px;}
.quiz-bar{height:8px;background:rgba(255,255,255,.1);border-radius:100px;margin:18px 0 6px;overflow:hidden;}
.quiz-shell.light .quiz-bar{background:rgba(13,27,75,.08);}
.quiz-bar span{display:block;height:100%;width:0;background:linear-gradient(90deg,#2bf0c8,#ffc800);transition:width .4s;}
.quiz-score{font-family:'Syne',sans-serif;font-size:clamp(30px,5vw,52px);font-weight:800;margin:12px 0;}
.quiz-shell.dark .quiz-score{color:#fff;}
.quiz-shell.light .quiz-score{color:var(--ink);}

/* ===== Math formula blocks (KaTeX, dark .lab skin) ===== */
.formula-block{background:#101f57;border:1px solid rgba(255,255,255,.1);border-radius:14px;padding:22px 26px;margin:18px 0 22px;overflow-x:auto;}
.formula-block .katex{color:#e7ecff;font-size:1.05em;}
.formula-block .katex-display{margin:0;}
.formula-label{font-size:10.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:#8b96c9;margin:0 0 12px;}
.lab .katex{color:#e7ecff;}
.play-lab .katex,.compare-card .katex{color:inherit;}

/* ===== Worked calculation boxes ===== */
.worked{background:rgba(255,200,0,.07);border:1px solid rgba(255,200,0,.28);border-radius:14px;padding:22px 26px;margin:20px 0;}
.worked h5{font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:#ffc800;margin:0 0 12px;}
.worked p{font-size:14.5px;color:#dbe1fb;line-height:1.85;margin:0 0 8px;}
.worked p:last-child{margin-bottom:0;}
.worked .katex{color:#fff8e0;}

/* ===== Code blocks (Python / Colab) ===== */
.code-block{background:#080f38;border:1px solid rgba(255,255,255,.1);border-radius:14px;margin:18px 0 24px;overflow:hidden;}
.code-block .code-tab{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.05);padding:9px 18px;font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:#8b96c9;border-bottom:1px solid rgba(255,255,255,.08);}
.code-block pre{margin:0;padding:20px 22px;overflow-x:auto;}
.code-block code{font-family:'SF Mono',Consolas,'Liberation Mono',Menlo,monospace;font-size:13.5px;line-height:1.75;color:#e7ecff;white-space:pre;}
.code-block .cm{color:#6b78ab;font-style:italic;}
.code-block .kw{color:#2bf0c8;}
.code-block .st{color:#ffc800;}
.code-block .nu{color:#ff9d7a;}
.code-block .fn{color:#8ec9ff;}

/* ===== Compare cards ===== */
.compare-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;margin:22px 0;}
.compare-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);border-radius:16px;padding:26px 28px;}
.compare-card h5{font-family:'Space Grotesk',sans-serif;font-size:17px;color:#fff;margin:0 0 14px;display:flex;align-items:center;gap:10px;}
.compare-card ul{margin:0;padding-left:18px;font-size:13.5px;color:#cdd6f4;line-height:1.9;}
.compare-card ul li{margin-bottom:6px;}

/* ===== Flag chips (decorative team list) ===== */
.flag-grid{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.flag-chip{display:inline-flex;align-items:center;gap:7px;background:var(--panel-2);border:1px solid var(--line);border-radius:100px;padding:7px 14px;font-size:12.5px;color:var(--ink-mid);font-weight:600;}
.flag-chip .flag{font-size:16px;line-height:1;}
.hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 4px;}
.hero-chip{display:inline-flex;align-items:center;gap:9px;background:var(--panel);border:1px solid var(--line-strong);border-radius:100px;padding:10px 18px;font-size:13.5px;font-weight:600;color:var(--ink);}
.hero-chip .flag{font-size:19px;}

/* ===== World Cup fixture display cards ===== */
.fixture-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin:22px 0 30px;}
.fixture-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);border-radius:16px;padding:20px 22px;}
.fixture-card .fx-when{font-size:10.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#ffc800;margin-bottom:12px;}
.fixture-card .fx-teams{display:flex;align-items:center;justify-content:space-between;font-family:'Space Grotesk',sans-serif;font-size:16.5px;color:#fff;font-weight:700;gap:8px;}
.fixture-card .fx-team{display:flex;align-items:center;gap:8px;}
.fixture-card .flag{font-size:22px;line-height:1;}
.fixture-card .fx-vs{color:#6b78ab;font-size:11.5px;font-weight:700;flex-shrink:0;}
.fixture-card .fx-venue{margin-top:12px;font-size:12px;color:#8b96c9;line-height:1.6;}

/* ===== World Cup predictor form ===== */
.wc-form{display:flex;flex-direction:column;gap:22px;margin-top:8px;}
.wc-form .wc-row{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.wc-form label{display:flex;flex-direction:column;gap:7px;font-size:14px;font-weight:600;color:#e7ecff;}
.wc-form label .req{color:#ff6a55;}
.wc-form input[type=text],.wc-form input[type=email],.wc-form input[type=number],.wc-form select,.wc-form textarea{background:#eef3fb !important;border:1px solid rgba(13,27,75,.16) !important;border-radius:10px !important;padding:12px 14px !important;font-family:'Inter',sans-serif;font-size:14.5px !important;color:#0d1b4b !important;width:100%;box-sizing:border-box;box-shadow:0 1px 2px rgba(0,0,0,.18);}
.wc-form input::placeholder,.wc-form textarea::placeholder{color:#7581a8 !important;}
.wc-form input:hover,.wc-form select:hover,.wc-form textarea:hover{background:#f4f8ff !important;}
.wc-form input:focus,.wc-form select:focus,.wc-form textarea:focus{outline:none;background:#ffffff !important;border-color:#12b39c !important;box-shadow:0 0 0 3px rgba(43,240,200,.30) !important;}
.wc-form select option{background:#ffffff;color:#0d1b4b;}
.wc-form .hp{position:absolute;left:-9999px;}
.wc-form .check{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:#cdd6f4;font-weight:400;}
.wc-form .check input{width:auto;margin-top:3px;}
.wc-form .check a{color:#2bf0c8;}

.match-slot{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.12);border-radius:16px;padding:22px 24px;}
.match-slot h5{margin:0 0 6px;font-family:'Space Grotesk',sans-serif;font-size:14.5px;color:#2bf0c8;letter-spacing:.02em;}
.match-slot .ms-sub{margin:0 0 16px;font-size:12px;color:#8b96c9;}
.match-slot .ms-teams{display:grid;grid-template-columns:1fr auto 1fr;gap:14px;align-items:center;}
.match-slot .ms-pick{display:flex;flex-direction:column;align-items:center;gap:8px;}
.match-slot .ms-pick label{flex-direction:row;align-items:center;gap:8px;font-size:14px;color:#e7ecff;cursor:pointer;}
.match-slot .ms-pick input[type=radio]{width:auto;accent-color:#2bf0c8;}
.match-slot .flag{font-size:26px;}
.match-slot .ms-vs{color:#6b78ab;font-weight:700;font-size:12.5px;}
.match-slot .ms-score{display:grid;grid-template-columns:1fr auto 1fr;gap:14px;align-items:center;margin-top:16px;}
.match-slot .ms-score input{text-align:center;}
.match-slot .ms-dash{text-align:center;color:#6b78ab;font-weight:700;}

.gini-readout{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin-top:20px;}
.gini-stat{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:16px 18px;text-align:center;}
.gini-stat .gs-label{font-size:10px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#8b96c9;margin-bottom:8px;}
.gini-stat .gs-val{font-family:'Space Grotesk',sans-serif;font-size:23px;font-weight:800;color:#fff;}
.gini-stat.left .gs-val{color:#4fc3f7;}
.gini-stat.right .gs-val{color:#ff6a55;}
.gini-stat.weighted .gs-val{color:#2bf0c8;}

.predict-success{display:none;text-align:center;padding:40px 20px;}
.predict-success .big-check{font-size:48px;margin-bottom:14px;}
.predict-success h4{font-family:'Space Grotesk',sans-serif;font-size:22px;color:#fff;margin-bottom:10px;}
.predict-success p{font-size:15px;color:#aab4dd;max-width:480px;margin:0 auto;line-height:1.7;}

@media(max-width:640px){
  .wc-form .wc-row{grid-template-columns:1fr;}
  .match-slot .ms-teams,.match-slot .ms-score{grid-template-columns:1fr;}
  .match-slot .ms-vs,.match-slot .ms-dash{padding:2px 0;}
  .fixture-card .fx-teams{flex-direction:column;align-items:flex-start;gap:10px;}
  .fixture-card .fx-vs{align-self:center;}
}

/* ===== formula-label / worked light-skin overrides (they default to
   light-on-dark colours tuned for .lab; .play-lab has a light background) ===== */
.play-lab .formula-label{color:var(--accent-2);}
.play-lab .worked h5{color:#b8860b;}
.play-lab .worked p{color:var(--ink-mid);}
.play-lab .worked .katex{color:var(--ink);}

/* ===== .wc-form / .match-slot / .predict-success light-skin overrides
   (built for .lab's dark background; on .play-lab's light background the
   default white-on-white text and near-invisible translucent borders need
   proper light-skin colours, plus an input fill that reads as clearly
   different from the card behind it) ===== */
.play-lab .wc-form label{color:var(--ink);}
.play-lab .wc-form input[type=text],.play-lab .wc-form input[type=email],.play-lab .wc-form input[type=number],.play-lab .wc-form select,.play-lab .wc-form textarea{background:#5cc8ff !important;border:2px solid var(--line-strong) !important;color:var(--ink) !important;}
.play-lab .wc-form input::placeholder,.play-lab .wc-form textarea::placeholder{color:var(--ink-dim);}
.play-lab .wc-form input:focus,.play-lab .wc-form select:focus,.play-lab .wc-form textarea:focus{border-color:#00cfe8;}
.play-lab .wc-form select option{background:#fff;color:var(--ink);}
.play-lab .wc-form .check{color:var(--ink-mid);}
.play-lab .match-slot{background:#fff;border:2px solid var(--line-strong);}
.play-lab .match-slot h5{color:var(--lesson-accent,var(--accent-2));}
.play-lab .match-slot .ms-sub{color:var(--ink-mid);}
.play-lab .match-slot .ms-pick label{color:var(--ink);}
.play-lab .match-slot .ms-vs,.play-lab .match-slot .ms-dash{color:var(--ink-dim);}
.play-lab .predict-success h4{color:var(--ink);}
.play-lab .predict-success p{color:var(--ink-mid);}

/* ===== World Cup 2026 Pre-Teen Special: bonus formula box ===== */
.bonus-box{background:#fff;border:2px dashed var(--accent-2);border-radius:16px;padding:18px 22px;margin:18px 0;max-width:720px;}
.bonus-box summary{cursor:pointer;font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:14.5px;color:var(--accent-2);list-style:none;}
.bonus-box summary::-webkit-details-marker{display:none;}
.bonus-box summary::before{content:'🤓 ';}
.bonus-box[open] summary{margin-bottom:12px;}
.bonus-box p{font-size:14px;color:var(--ink-mid);line-height:1.7;margin:8px 0 0;}

/* ===== Drop-zone tints (3-way sort + single-bin games) ===== */
.drop-zones.three{grid-template-columns:repeat(3,1fr);}
@media(max-width:760px){.drop-zones.three{grid-template-columns:1fr;}}
.play-lab .drop-zone.strikers{background:#fff1ec;}
.play-lab .drop-zone.midfielders{background:#fff7e0;}
.play-lab .drop-zone.defenders{background:#eaf7ff;}
.play-lab .drop-zone.stats{background:#f2fbe9;}

/* Small pick-chip variant for short button labels (zones, onside/offside) */
.play-lab .pick-chip.small{font-size:15px;font-weight:700;font-family:'Space Grotesk',sans-serif;padding:12px 20px;}

/* ===== Offside VAR: round score track ===== */
.score-track{display:flex;gap:10px;justify-content:center;margin:18px 0 6px;flex-wrap:wrap;}
.score-pip{width:36px;height:36px;border-radius:50%;background:#fff;border:3px solid var(--line-strong);display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;color:var(--ink-mid);transition:all .2s;}
.score-pip.done-right{border-color:#18c07a;background:#e7fbf1;color:#0f8a56;}
.score-pip.done-wrong{border-color:#ff6a55;background:#ffefec;color:#c8402b;}

/* ===== Decision tree: mini formation diagram payoff ===== */
.formation-pitch{background:linear-gradient(180deg,#4aa350,#3f9142);border-radius:16px;padding:22px 14px;display:flex;flex-direction:column-reverse;gap:16px;max-width:320px;margin:20px auto 0;box-shadow:inset 0 0 0 3px rgba(255,255,255,.25);}
.formation-row{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;}
.formation-dot{width:26px;height:26px;border-radius:50%;background:#fff;border:3px solid var(--ink);box-shadow:0 3px 6px rgba(0,0,0,.25);}
.formation-dot.gk{background:var(--warm);}
.formation-result{text-align:center;margin-top:18px;}
.formation-result .fr-name{font-family:'Space Grotesk',sans-serif;font-weight:800;font-size:21px;color:var(--ink);}
.formation-result .fr-sub{font-size:13.5px;color:var(--ink-mid);margin-top:6px;}

/* ===== "What You Learned" recap uses .schedule-grid / .session-card already defined above ===== */

/* ===== Certificate ===== */
.cert-form-card{background:#fff;border:2px solid var(--line-strong);border-radius:22px;padding:34px clamp(20px,4vw,42px);max-width:640px;margin:0 auto;text-align:center;}
.cert-input-label{display:block;font-family:'Space Grotesk',sans-serif;font-size:18px;font-weight:700;color:var(--ink);margin-bottom:16px;}
.cert-input-row{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;}
.cert-input-row input[type=text]{flex:1;min-width:220px;border:3px solid var(--line-strong);border-radius:100px;padding:13px 22px;font-size:16px;font-family:'Inter',sans-serif;color:var(--ink);box-sizing:border-box;}
.cert-input-row input[type=text]:focus{outline:none;border-color:#00cfe8;}
.cert-note{font-size:12.5px;color:var(--ink-dim);margin-top:16px;line-height:1.6;}

.cert-wrap{max-width:800px;margin:0 auto;}
.cert-card{background:#fffaf0;border-radius:22px;padding:10px;box-shadow:0 20px 60px rgba(13,27,75,.18);}
.cert-border{border:3px solid var(--ink);border-radius:16px;padding:clamp(30px,5vw,54px) clamp(20px,5vw,50px) 36px;text-align:center;position:relative;}
.cert-border::before{content:'';position:absolute;inset:12px;border:2px solid var(--warm);border-radius:9px;pointer-events:none;}
.cert-logo{height:54px;width:auto;margin:0 auto 20px;display:block;}
.cert-eyebrow{font-size:11px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-2);opacity:.75;margin-bottom:14px;}
.cert-title{font-family:'Syne',sans-serif;font-size:clamp(24px,4vw,36px);color:var(--ink);margin:0 0 20px;}
.cert-sub{font-size:15px;color:var(--ink-mid);margin:0 0 8px;}
.cert-name{font-family:'Space Grotesk',sans-serif;font-weight:800;font-size:clamp(28px,5.5vw,44px);background:linear-gradient(90deg,#00a8c2,#0d1b4b 55%,#ff6a55);-webkit-background-clip:text;background-clip:text;color:transparent;padding-bottom:12px;border-bottom:3px solid var(--warm);display:inline-block;margin:0 auto 22px;max-width:92%;word-break:break-word;}
.cert-desc{font-size:14.5px;color:var(--ink-mid);line-height:1.75;max-width:540px;margin:0 auto 24px;}
.cert-badges{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:28px;}
.cert-badge{background:var(--panel-2);border:1px solid var(--line);border-radius:100px;padding:8px 16px;font-size:12.5px;font-weight:700;color:var(--ink);}
.cert-footer{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;border-top:1px dashed var(--line-strong);padding-top:20px;font-size:12.5px;font-weight:600;color:var(--ink-mid);}
.cert-seal{font-size:28px;}
@media(max-width:560px){.cert-footer{flex-direction:column;text-align:center;}}

/* ===== Confetti (certificate + perfect-score celebrations) ===== */
#confetti-layer{position:fixed;inset:0;pointer-events:none;overflow:hidden;z-index:400;}
.confetti-piece{position:fixed;top:-24px;width:10px;height:14px;border-radius:2px;opacity:.95;animation-name:confetti-fall;animation-timing-function:cubic-bezier(.3,.6,.7,1);animation-fill-mode:forwards;}
@keyframes confetti-fall{
  0%{transform:translate(0,0) rotate(0deg);opacity:1;}
  100%{transform:translate(var(--dx,0),108vh) rotate(var(--rot,360deg));opacity:0;}
}
@media (prefers-reduced-motion: reduce){.confetti-piece{display:none;}}

/* ===== World Cup 2026 Pre-Teen Special: real team stats + in-browser AI ===== */
.stat-panel{background:#fff;border:2px solid var(--line-strong);border-radius:16px;padding:18px 20px;margin-top:16px;}
.stat-panel .sp-title{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--accent-2);margin-bottom:12px;}
.rank-badges{display:flex;gap:14px;align-items:center;justify-content:center;margin-bottom:6px;flex-wrap:wrap;}
.rank-badge{display:flex;flex-direction:column;align-items:center;gap:4px;background:var(--panel);border:2px solid var(--line);border-radius:14px;padding:10px 18px;min-width:120px;}
.rank-badge .rb-flag{font-size:24px;}
.rank-badge .rb-num{font-family:'Space Grotesk',sans-serif;font-weight:800;font-size:20px;color:var(--ink);}
.rank-badge .rb-label{font-size:11px;color:var(--ink-mid);text-align:center;}
.rank-vs{font-weight:700;color:var(--ink-dim);font-size:13px;}

.ai-box{background:linear-gradient(135deg,#fff,var(--lesson-tint,#f5f7ff));border:3px solid var(--lesson-accent,var(--accent-2));border-radius:18px;padding:24px 26px;margin:20px 0;box-shadow:0 10px 28px rgba(13,27,75,.12);}
.ai-box-tag{display:inline-flex;align-items:center;gap:6px;font-family:'Space Grotesk',sans-serif;font-size:10.5px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;background:var(--lesson-accent,var(--accent-2));color:#fff;padding:5px 12px;border-radius:100px;margin-bottom:14px;}
.ai-box-head{display:flex;gap:14px;align-items:flex-start;margin-bottom:4px;}
.ai-box-bot{font-size:34px;line-height:1;flex-shrink:0;}
.ai-box-title{font-family:'Space Grotesk',sans-serif;font-weight:800;font-size:18px;color:var(--ink);margin-bottom:4px;}
.ai-box-sub{font-size:14.5px;color:var(--ink-mid);line-height:1.65;margin:0;}
.ai-btn{margin-top:12px;}
.pick-prompt{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:15px;color:var(--lesson-accent,var(--accent-2));background:var(--lesson-tint,var(--panel));border-radius:12px;padding:12px 16px;margin:18px 0 14px;line-height:1.5;}

/* course.css sets `.lesson-main .lab p/strong` to light-on-dark colours for
   plain text sitting directly on .lab's dark background. .ai-box and
   .pick-prompt are light cards floating on top of that background, so their
   text needs the dark-on-light colours back; the extra class beats that
   rule's specificity. */
.lesson-main .lab .ai-box .ai-box-sub{color:var(--ink-mid);}
.lesson-main .lab .pick-prompt{color:var(--lesson-accent,var(--accent-2));}

.team-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px;margin:18px 0;}
.team-card{background:#fff;border:2px solid var(--line-strong);border-radius:14px;padding:14px 16px;text-align:center;}
.team-card .tc-flag{font-size:28px;margin-bottom:6px;}
.team-card .tc-name{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:14px;color:var(--ink);margin-bottom:8px;}
.team-card .tc-stat{display:flex;justify-content:space-between;gap:8px;font-size:11.5px;color:var(--ink-mid);padding:4px 0;border-top:1px dashed var(--line);}
.team-card .tc-stat:first-of-type{border-top:none;}
.team-card .tc-stat b{color:var(--ink);font-weight:700;}

/* Decision-tree diagram (Lesson 7) */
.tree-svg-stage{background:#fff;border:2px solid var(--line);border-radius:18px;padding:16px;overflow-x:auto;}

@media(max-width:640px){
  .rank-badges{flex-direction:column;}
  .rank-vs{transform:rotate(90deg);}
}

/* Certificate signature block: Adrian Dunkley, Chief AI Officer.
   Appears on every certificate on the site (HTML preview card). The
   matching canvas drawing lives in each cert page's drawCertificate(). */
.cert-sign { display: flex; flex-direction: column; align-items: center; gap: 1px; }
.cert-sign-script {
  font-family: 'Great Vibes', 'Allura', cursive;
  font-size: 30px; line-height: 1.05; color: var(--ink);
  border-bottom: 1.5px solid var(--line-strong);
  padding: 0 14px 2px;
}
.cert-sign-name { font-size: 12px; font-weight: 700; color: var(--ink); margin-top: 4px; }
.cert-sign-org { font-size: 11px; font-weight: 600; color: var(--ink-mid); }