:root{--font:"Nunito", "Nunito Sans", ui-rounded, "SF Pro Rounded", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;--primary:#5b6cff;--primary-dark:#4353e6;--primary-soft:#e6e9ff;--accent:#ff8a3d;--accent-dark:#e8752b;--accent-soft:#ffe8d6;--success:#2ecc71;--success-soft:#dff8e8;--danger:#ff6b6b;--danger-soft:#ffe3e3;--warn:#ffd166;--warn-soft:#fff4d6;--bg:#fff8ef;--surface:#fff;--surface-2:#fff1e0;--text:#2b2d42;--muted:#6b6f85;--border:#eadfce;--shadow:0 4px 0 #2b2d4214, 0 10px 24px #2b2d4214;--shadow-sm:0 2px 0 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18px;display:flex}.consigne-illu{font-size:2.6rem;line-height:1}.consigne-text{flex:1;font-size:1.3rem;font-weight:800}.consigne-text .md strong{color:var(--accent)}.hint-row{margin-bottom:14px}.hint-box{background:var(--warn-soft);border:2px solid var(--warn);border-radius:var(--radius-sm);align-items:flex-start;gap:8px;padding:10px 14px;animation:.25s both fade-up;display:flex}.hint-box .md p{margin:0}.player-body{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:18px}.ex-help{color:var(--muted);margin:0 0 12px}.choice-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr));gap:12px;display:grid}.choice{border-radius:var(--radius-sm);border:3px solid var(--border);background:var(--surface);text-align:left;align-items:center;gap:12px;min-height:60px;padding:12px 16px;font-size:1.25rem;font-weight:800;transition:transform .12s,border-color .12s,background 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p{margin:0}.trou-text{font-size:1.5rem;font-weight:700;line-height:2.2}.hole{border:3px dashed var(--subject);background:var(--subject-soft);min-width:3em;min-height:48px;font:inherit;text-align:center;vertical-align:middle;color:var(--subject);border-radius:12px;margin:0 4px;padding:2px 12px;font-weight:900;display:inline-block}.hole.active{background:var(--warn-soft);border-style:solid;border-color:var(--accent)}.hole.filled{color:var(--text);border-style:solid}.hole.is-correct{border-color:var(--success);background:var(--success-soft);color:var(--text)}.hole.is-wrong{border-color:var(--danger);background:var(--danger-soft);color:var(--text)}.hole-input{width:auto}.hole-input:focus{border-style:solid;border-color:var(--accent);outline:none}.word-bank{border-top:2px dashed var(--border);flex-wrap:wrap;gap:10px;margin-top:14px;padding-top:14px;display:flex}.word-bank .btn-chip{font-size:1.2rem;font-weight:900}.order-answer{border-radius:var(--radius-sm);border:3px dashed 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#d77828}.fraction-piece:focus-visible{outline:3px solid var(--primary)}.fraction-result{justify-content:center;align-items:baseline;gap:12px;margin:14px 0;display:flex}.fraction-result strong{color:var(--subject);font-size:2.2rem}.fraction-result span{color:var(--muted)}.water-stage{background:linear-gradient(#d9efff,#f8fcff);border-radius:24px;width:min(100%,640px);height:280px;margin:auto;position:relative;overflow:hidden}.water-vessel{opacity:.7;border:8px solid #82b8de;border-top:0;border-radius:5px 5px 32px 32px;width:58%;height:57%;position:absolute;bottom:10%;left:21%}.water-vessel:after{content:"";background:#64bbef88;border-radius:0 0 20px 20px;height:57%;transition:height .5s,opacity .5s;position:absolute;bottom:4px;left:4px;right:4px}.phase-solide .water-vessel:after{background:#c4efff;height:67%}.phase-gaz .water-vessel:after{opacity:.45;height:8%}.water-particle{z-index:2;background:#268ad3;border-radius:50%;width:15px;height:15px;transition:left .65s,top .65s,background 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svg{width:100%;display:block}.circuit-wire{fill:none;stroke:#4b6284;stroke-width:9px;stroke-linecap:round;stroke-linejoin:round}.circuit-material{stroke-width:13px;stroke-linecap:round;transition:stroke .3s}.circuit-material-metal{stroke:#9ca9b5}.circuit-material-plastic{stroke:#d77b46}.circuit-flow{fill:none;stroke:#ffc72c;stroke-width:5px;stroke-dasharray:8 15;stroke-linecap:round;animation:1s linear infinite circuit-move}.circuit-contact{stroke:#df8c32;stroke-width:12px;stroke-linecap:round;transition:all .25s}.circuit-node{fill:#df8c32}.circuit-battery{fill:#344462}.circuit-symbol{fill:#fff;font-size:24px;font-weight:900}.circuit-bulb{fill:#d6dce5;stroke:#5e6980;stroke-width:7px;transition:fill .3s}.circuit-bulb-glow{fill:#ffda58;opacity:0;transition:opacity .3s}.is-lit .circuit-bulb{fill:#ffd84f}.is-lit .circuit-bulb-glow{opacity:.65;animation:1.1s ease-in-out infinite alternate bulb-pulse}.circuit-filament{fill:none;stroke:#987423;stroke-width:4px}.circuit-label{fill:#36415b;font-size:18px;font-weight:800}.circuit-controls{flex-wrap:wrap;justify-content:center;align-items:center;gap:20px;display:flex}.circuit-controls fieldset{border:2px solid var(--border);border-radius:14px;padding:4px 14px}.circuit-controls legend{font-size:.9rem;font-weight:800}@keyframes circuit-move{to{stroke-dashoffset:-23px}}@keyframes bulb-pulse{to{opacity:.9;transform-origin:495px 160px;transform:scale(1.07)}}@media (width<=560px){.lesson-lab-callout{flex-wrap:wrap}.lesson-lab-callout .btn{width:100%}.lab-header{align-items:flex-start}.lab-header>span{flex-basis:56px;width:56px;height:56px;font-size:1.8rem}.abacus-frame{border-width:8px;min-height:135px}.abacus-bead{height:48px}.fraction-piece{min-height:88px}.circuit-controls{flex-direction:column}}@media (prefers-color-scheme:dark){.water-stage,.circuit-stage,.mixture-stage{background:#243c55}.water-phase-label{color:#153650}.fraction-piece{background:#fff0d9}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}.confetti{display:none}}