/* V4 · design immersif, responsive, respect des préférences de mouvement */
:root{--bg:#090e1b;--panel:#151b2d;--panel2:#1d253b;--sidebar:#0d1424;--line:rgba(190,208,240,.13);--gold:#f2c985;--purple:#b7a3ff;--teal:#70dbc9;--muted:#a3aec3;--ink:#f9f4ed;--shadow:0 22px 68px rgba(0,0,0,.34)}
body{background:radial-gradient(ellipse at 88% -20%,#22284c66,transparent 42%),linear-gradient(160deg,#0b1122,#11182a 60%,#0c1521)}
.sidebar{background:linear-gradient(165deg,#11172b,#0b1121 73%);border-right-color:rgba(242,201,133,.12)}
.brand-name{letter-spacing:.025em}.brand-mark{box-shadow:0 0 38px #a68bff2d;transform:rotate(-6deg)}
.brand-tag,.nav-label,.micro-label{letter-spacing:.13em}
.nav-item{border-radius:11px;transition:background .2s,border-color .2s,transform .2s}
.nav-item:hover{transform:translateX(2px)}.nav-item.active{background:linear-gradient(90deg,#e9bf7640,#9077f016);color:#ffdc9f;box-shadow:inset 2px 0 #f3ce91}
.content{max-width:1650px;margin:auto}.panel{background:linear-gradient(145deg,rgba(30,37,58,.98),rgba(17,23,40,.97));border-color:rgba(190,208,240,.13);box-shadow:0 10px 35px #03091726}
.btn-primary{background:linear-gradient(105deg,#f0c67d,#ecae77);color:#1f1923;box-shadow:0 5px 25px #edbd7d21;border:1px solid #ffe0a1}
.btn-primary:hover{box-shadow:0 10px 28px #edbd7d47;filter:brightness(1.06)}
.btn-secondary{background:#222c44;border-color:#42516d;color:#f3dfbe}.btn-outline{border-color:#4e5573}
.hero{background:radial-gradient(circle at 88% 58%,#8782ed33,transparent 33%),radial-gradient(circle at 5% 100%,#e9a75c16,transparent 52%),linear-gradient(115deg,#1d253e,#161d32);border-color:#e3bf7d4c}
.hero h1{letter-spacing:-.025em}.hero-right .hero-orb{filter:drop-shadow(0 0 22px #bbaaff55)}
.title-row h1,.v4-page-hero h1{letter-spacing:-.03em}
.notice{background:#161f32;border-color:#334157}
.v4-page-hero{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:31px 34px;margin-bottom:22px;border-radius:22px;border:1px solid #9a87bf4a;background:radial-gradient(circle at 86% 10%,#c69bfc26,transparent 34%),linear-gradient(122deg,#27314a,#151d30)}
.v4-page-hero .micro-label{color:#e6c493}.v4-page-hero h1{font-size:clamp(28px,3vw,43px);margin:8px 0 12px}.v4-page-hero p{font-size:14px;color:#c6cee1;max-width:720px}.v4-page-hero>strong{color:#f4d19a;font-size:29px;white-space:nowrap}
.v4-world-head{display:flex;justify-content:space-between;align-items:center;margin:15px 0 23px;gap:20px}.v4-world-head .micro-label{color:#e6ba77}.v4-world-head h1{font-size:clamp(30px,3.1vw,49px);margin:9px 0}.v4-world-head p{max-width:730px;color:#bec7d9;font-size:14px}.v4-world-mark{font:75px Georgia;color:#b4a1e5;text-shadow:0 0 55px #bc9bff99}
.v4-world-layout{display:grid;grid-template-columns:minmax(0,1fr) 276px;gap:19px;align-items:start}.v4-world-panel{min-width:0;background:#0e1525;border:1px solid #53607a67;border-radius:24px;overflow:hidden;box-shadow:0 35px 60px #0005}.v4-world-container{position:relative;min-height:520px;background:radial-gradient(circle at 50% 30%,#3c5571,#152236 67%,#0b1423)}
#v4-world-canvas{width:100%;height:520px;display:block;cursor:grab;touch-action:pan-y}#v4-world-canvas:active{cursor:grabbing}.v4-world-gradient{position:absolute;inset:0;pointer-events:none;background:linear-gradient(180deg,#0d15206e,transparent 24%,transparent 64%,#080d1bc9)}
.v4-world-overlay-top,.v4-world-overlay-bottom{position:absolute;display:flex;align-items:center;justify-content:space-between;gap:12px;z-index:1;left:22px;right:22px}.v4-world-overlay-top{top:20px;color:#e8ebfb;font-size:12px;letter-spacing:.06em}.v4-world-overlay-bottom{bottom:19px;max-width:calc(100% - 44px);color:#f2e7d0;font-size:13px}.v4-dot{display:inline-block;width:9px;height:9px;border-radius:100%;background:#8cf7d0;box-shadow:0 0 13px #8af7cf;margin-right:6px}.v4-mini-tag{background:#0e1830b8;padding:7px 10px;border:1px solid #7d8eb044;border-radius:99px;white-space:nowrap}.v4-world-overlay-bottom #v4-near{background:#0d172ab5;padding:9px 14px;border-radius:9px;backdrop-filter:blur(10px)}.v4-world-overlay-bottom button{white-space:nowrap}.v4-world-foot{display:flex;justify-content:space-between;gap:20px;color:#b6c0d0;background:#111b2d;padding:13px 18px;font-size:11px;line-height:1.6;flex-wrap:wrap}
.v4-touch-controls{position:absolute;bottom:70px;left:22px;z-index:2;display:none;flex-direction:column;align-items:center;gap:3px}.v4-touch-controls div{display:flex;gap:3px}.v4-touch-controls button{background:#101b32c9;color:#fff;border:1px solid #ffffff5e;backdrop-filter:blur(7px);border-radius:11px;width:46px;height:46px;font-size:23px;touch-action:none;user-select:none}.v4-touch-controls button:active{background:#e8b979;color:#1d1b20}
.v4-portal-list{border:1px solid #4d5d7961;background:linear-gradient(150deg,#1e263c,#121b2d);border-radius:21px;padding:23px 17px}.v4-portal-list .micro-label{font-size:10px;color:#e8c48e}.v4-portal-list h3{margin:7px 0 15px}.v4-portal{width:100%;display:flex;align-items:center;text-align:left;background:#20283c;padding:13px 9px;border:1px solid #ffffff13;border-radius:13px;color:#f5ede6;gap:12px;margin-top:9px}.v4-portal:hover{border-color:#eac48255;background:#27344e}.v4-portal>span{width:44px;height:44px;flex-shrink:0;display:grid;place-items:center;border-radius:12px;font-size:23px;background:rgba(var(--portal),.13);color:rgb(var(--portal));box-shadow:inset 0 0 18px rgba(var(--portal),.06)}.v4-portal>div{flex:1;min-width:0}.v4-portal strong{display:block;font-size:12px;line-height:1.4}.v4-portal small{display:block;color:#a6b5ce;margin-top:3px;font-size:11px}.v4-portal b{color:#e6ba79}.v4-world-tip{margin-top:21px;color:#9eaac3;font-size:11px;line-height:1.7;background:#10182b;padding:13px;border-radius:12px;border:1px solid #3e507169}.v4-webgl-fallback{min-height:520px;display:grid;place-items:center;text-align:center;padding:30px;color:#f7ddae}
.v4-lesson-header{border-top:1px solid #e9bd7d42;display:flex;justify-content:space-between;gap:14px;align-items:center;padding-top:25px;margin-top:26px}.v4-lesson-header h2{font-size:25px;margin-top:6px}.v4-word-count{font-size:11px;white-space:nowrap;padding:9px 11px;background:#ebc17c19;border:1px solid #f4d19643;border-radius:99px;color:#f0cf98;font-weight:800}.v4-lesson-section{border-left:2px solid #e5bd8361;padding:0 0 19px 17px;margin:21px 0}.v4-lesson-section h3{font-size:19px;color:#f4e3ca;margin-bottom:12px}.v4-section-n{font-family:Georgia,serif;color:#d9ac66;opacity:.83;margin-right:8px}.v4-lesson-section p,.v4-worked p,.v4-mistakes p{line-height:1.86;font-size:14px;color:#ced5e1;white-space:pre-line}.v4-worked{background:linear-gradient(120deg,#2b3247,#263345);padding:23px 25px;border:1px solid #86c6c33c;border-radius:17px;margin-top:12px}.v4-worked span{color:#98dfd1;font-weight:800;letter-spacing:.08em;font-size:12px;display:block;margin-bottom:10px}.v4-mistakes{background:#4c353b38;padding:19px;border:1px solid #e8a4a23f;border-radius:14px;margin:13px 0}.v4-mistakes strong{color:#f9bcb6}.v4-mistakes p{font-size:13px;margin-top:7px}.v4-lesson-tools{margin:19px 0 0;display:flex;gap:12px;align-items:center;flex-wrap:wrap}.v4-lesson-warning{border:1px dashed #f5cc7c71;border-radius:10px;padding:15px;color:#f3d7a2}
.v4-hero-panel{margin:18px 0 22px}.v4-panel-heading{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-bottom:18px}.v4-panel-heading h2{margin:5px 0}.v4-panel-heading p{font-size:13px;color:#b2bcd3}.v4-big-avatar{font-size:43px;width:70px;height:70px;display:grid;place-items:center;background:linear-gradient(140deg,#34375a,#242c46);border:1px solid #e5b97145;border-radius:15px}.v4-choice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:22px}.v4-class{background:#1a233a;border:1px solid #40506a;border-radius:12px;color:#e4e9f5;padding:15px 9px;display:grid;justify-items:center;gap:3px}.v4-class.active{border-color:#efce8b;box-shadow:inset 0 0 23px #f4c98618;background:#332d3c}.v4-class>span{font-size:32px}.v4-class strong{font-size:13px}.v4-class small{font-size:10px;color:#b0b7c8}.v4-hero-panel h3{margin:9px 0}.v4-tints{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0 18px}.v4-tints button{display:flex;gap:7px;align-items:center;padding:8px 11px;border:1px solid #39455e;border-radius:10px;color:#d5d6e0;background:#1b2335;font-size:12px}.v4-tints button.active{border-color:#ecc98f}.v4-tints span{width:19px;height:19px;background:var(--tint);border-radius:50%;box-shadow:0 0 15px var(--tint)}
.v4-metric-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:0 0 20px}.v4-metric-row>div{background:#1c263d;border:1px solid #4f59754d;padding:22px;border-radius:16px}.v4-metric-row strong{font:33px Georgia;color:#efca87;display:block}.v4-metric-row span{font-size:12px;color:#b1bed1}.v4-guild-emblem{font-size:66px;filter:drop-shadow(0 0 22px #deb77255)}.v4-buildings{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px}.v4-building{display:grid;grid-template-columns:70px 1fr;gap:16px;align-items:start}.v4-building .btn{grid-column:2;justify-self:start}.v4-building-icon{display:grid;place-items:center;background:#4c436338;font-size:43px;border:1px solid #ab8dba36;height:74px;border-radius:16px}.v4-building h2{font-size:23px;margin:5px 0}.v4-building p{font-size:13px;color:#a8b3c7;line-height:1.6;margin:0 0 15px}.v4-building small{display:block;color:#b7bbca;font-size:11px;margin-top:8px}.v4-building.built{border-color:#7dbb9c65}.v4-coop-note{margin-top:17px}.v4-coop-note p{margin-top:8px}
.v4-grades-layout{display:grid;grid-template-columns:minmax(250px,420px) 1fr;gap:17px;margin-bottom:19px}.v4-form-inline{display:grid;grid-template-columns:1fr 1fr;gap:15px}.v4-grade-bar{margin:17px 0}.v4-grade-bar .progress{margin-top:6px}.v4-grade-bar small{color:#8797b6}.v4-grade-bar span{color:#e6cc9f}.v4-grade-row{display:flex;gap:13px;align-items:center;padding:14px 0;border-bottom:1px solid #ffffff16}.v4-grade-row>div{flex:1}.v4-grade-row strong{font-size:13px}.v4-grade-row small{display:block;color:#a4aec4;margin-top:4px}.v4-grade-row>button{background:none;border:0;color:#e1a1a1}.v4-grade-mark{font:20px Georgia;color:#eccb92}.v4-math-note{background:#141e32;border:1px solid #7680ad41;padding:14px;border-radius:12px;font-size:12px;color:#aebbd2;margin-top:22px}
.v4-shop-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.v4-shop-item{padding:19px 14px;background:linear-gradient(145deg,#242c46,#171e31);border:1px solid #d8c08e2d;border-radius:16px;display:flex;flex-direction:column;min-height:205px}.v4-shop-icon{font-size:47px;margin-bottom:8px;filter:drop-shadow(0 8px 14px #0006)}.v4-shop-item h3{font-size:18px;margin:8px 0 18px}.v4-shop-footer{display:flex;justify-content:space-between;align-items:center;gap:9px;margin-top:auto}.v4-shop-footer>span{color:#eecf97;font-weight:800;font-size:13px}
.v4-adaptive-panel{margin:20px 0}.v4-adaptive-badge{border:1px solid #ddbd815b;color:#efd399;background:#e9c27d17;border-radius:99px;padding:9px 13px;white-space:nowrap;font-size:12px}.v4-adaptive-list{display:grid;gap:9px;margin:14px 0}.v4-adaptive-list>button{display:flex;align-items:center;gap:15px;border:1px solid #384660;border-radius:13px;padding:13px 16px;color:#e6e9f3;background:#202b42;text-align:left;width:100%}.v4-adaptive-list>button:hover{border-color:#d2a86f}.v4-reco-index{font:23px Georgia;color:#f0c783}.v4-adaptive-list button>div{flex:1}.v4-adaptive-list strong{font-size:13px}.v4-adaptive-list small{display:block;color:#a8b6ce;font-size:11px;margin-top:2px}.v4-adaptive-list button>span:last-child{font-size:12px;color:#f2cb8f}
.v4-question-shell{max-width:930px;margin:auto;padding:30px}.v4-question-top{display:flex;align-items:center;gap:10px;justify-content:space-between;margin-bottom:18px}.v4-question-shell h1{font-size:clamp(24px,2.5vw,37px);margin:8px 0 12px}.v4-question-shell>p{margin-bottom:18px}.v4-format-tag{background:#9873d330;color:#d9c5ff;border:1px solid #b78fff55;padding:8px 11px;font-size:11px;border-radius:99px;font-weight:800;white-space:nowrap;display:inline-block}.v4-answers{display:grid;grid-template-columns:1fr 1fr;gap:11px;margin-top:18px}.v4-answer{display:flex;align-items:center;gap:12px;text-align:left;border-radius:12px;border:1px solid #405471;background:#1c283f;color:#ecedf2;padding:15px;min-height:64px}.v4-answer:hover:not(:disabled){border-color:#bbacdd}.v4-answer.selected{border-color:#f4cb83;background:#f4cf8226;box-shadow:inset 0 0 15px #f0c47315}.v4-answer b{width:29px;height:29px;display:grid;place-items:center;border:1px solid #a5acc573;border-radius:8px;color:#eccc92;flex-shrink:0}.v4-answer span{font-size:14px}.v4-truth{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin:20px 0}.v4-type-wrap{display:grid;gap:8px;margin:21px 0}.v4-type-wrap label{font-size:13px;color:#ecd5b3;font-weight:800}.v4-type-wrap input{font-size:19px;max-width:580px}.v4-type-wrap small{color:#a5adc4}.v4-order{display:grid;gap:10px;margin:21px 0}.v4-order small{color:#a7b5c9}.v4-order-step{display:flex;gap:13px;align-items:center;padding:13px 15px;background:#1e2940;border:1px solid #3f4b65;border-radius:12px}.v4-order-step>span{color:#f2c78d;font:22px Georgia}.v4-order-step p{flex:1;font-size:13px}.v4-order-step>div{display:flex;gap:5px}.v4-order-step button{width:37px;height:37px;border-radius:8px;border:1px solid #576783;color:#e3d5c2;background:#30394f}.v4-order-step button:disabled{opacity:.3}.v4-action-row{display:flex;gap:12px;justify-content:flex-end;align-items:center;margin:21px 0 0;flex-wrap:wrap}.v4-hint{padding:15px;background:#28334c;border-left:3px solid #c1a2f8;border-radius:8px;color:#e1d4fa;margin-top:15px}.v4-feedback{border:1px solid #718ca26a;border-radius:13px;background:#202d44;padding:20px;margin:20px 0}.v4-feedback.good{border-color:#61caab6f;background:#19463850}.v4-feedback.bad{border-color:#daa67867;background:#61423735}.v4-feedback strong{color:#f7d7a7}.v4-feedback p{margin-top:9px;color:#ced6e2;font-size:13px;line-height:1.7}
.v4-battle{display:grid;grid-template-columns:minmax(0,.82fr) minmax(0,1fr);gap:16px;align-items:start}.v4-battle-stage{border-radius:21px;border:1px solid #b38abb75;background:radial-gradient(circle at 50% 55%,#78537a4c,transparent 40%),radial-gradient(circle at 50% 10%,#5575b45b,transparent 45%),linear-gradient(180deg,#252e4b,#10172a);position:relative;overflow:hidden;min-height:455px;padding:22px;display:flex;flex-direction:column;justify-content:space-between;box-shadow:inset 0 0 65px #100b286b}.v4-battle-header{display:flex;justify-content:space-between;gap:14px;font-size:10px;font-weight:800;letter-spacing:.12em;color:#eecb92}.v4-boss-art{height:240px;position:relative;display:grid;place-items:center}.v4-boss-halo{width:230px;height:230px;position:absolute;border:1px solid #edd0c066;border-radius:50%;box-shadow:0 0 68px #bb86dc57, inset 0 0 55px #966ba67a;animation:v4float 6s ease-in-out infinite}.v4-boss-creature{font-size:130px;filter:drop-shadow(0 14px 25px #000b);animation:v4bob 3s ease-in-out infinite}.v4-boss-particles{position:absolute;color:#e1b9fd88;top:5px;font-size:23px;letter-spacing:65px;white-space:nowrap}.v4-battle-stage>p{font-size:12px;color:#e8d6e3;margin-top:8px;text-align:center}.v4-health-box{background:#10172cbf;border:1px solid #a7a8b43e;border-radius:11px;padding:14px}.v4-health-box span{font-size:11px;text-transform:uppercase;letter-spacing:.07em;color:#d0bddc}.v4-health-box b{float:right;color:#f0d3bf}.v4-health-track{height:9px;background:#54384c;border-radius:99px;margin-top:10px;overflow:hidden}.v4-health-track i{display:block;background:linear-gradient(90deg,#b071a7,#e8a17f);height:100%;border-radius:99px;transition:width .4s}.v4-battle-question{padding:27px}.v4-battle-question h2{font-size:clamp(22px,2.2vw,30px);margin:15px 0 20px}.v4-battle-question .v4-answers{grid-template-columns:1fr}.v4-battle-question .v4-answer{min-height:57px}.v4-battle-question .btn-full{margin-top:18px}.v4-result{max-width:930px;margin:auto;text-align:center}.v4-result-symbol{font-size:76px}.v4-result h1{font-size:82px;color:#f1ce98;margin:8px 0}.v4-result h2{margin:6px 0}.v4-result>p{color:#b5c3db;font-size:13px;margin-bottom:22px}.v4-review-list{text-align:left;display:grid;gap:9px}.v4-review-list details{background:#1b263a;border:1px solid #334866;border-radius:12px;padding:16px}.v4-review-list summary{cursor:pointer;font-size:13px;font-weight:700}.v4-review-list summary>span{color:#e1b680;margin-right:6px}.v4-review-list details p{font-size:13px;color:#bfcde1;margin-top:8px;line-height:1.7}
@keyframes v4float{50%{transform:scale(1.06) rotate(6deg)}}@keyframes v4bob{50%{transform:translateY(-11px)}}
@media(max-width:1250px){.v4-world-layout{grid-template-columns:minmax(0,1fr) 245px}.v4-portal-list{padding:17px 12px}.v4-shop-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.v4-battle{grid-template-columns:1fr}.v4-battle-stage{min-height:300px}.v4-boss-art{height:170px}.v4-boss-halo{height:160px;width:160px}.v4-boss-creature{font-size:104px}}
@media(max-width:950px){.mobile-nav{justify-content:flex-start;overflow-x:auto;scrollbar-width:thin;gap:4px}.mobile-nav button{flex:0 0 79px;min-width:79px}.v4-world-layout{grid-template-columns:1fr}.v4-portal-list{display:grid;grid-template-columns:repeat(2,1fr);gap:9px}.v4-portal-list>.micro-label,.v4-portal-list>h3,.v4-world-tip{grid-column:1/-1}.v4-portal{margin:0}.v4-touch-controls{display:flex}}
@media(max-width:650px){.v4-world-head{align-items:flex-start}.v4-world-mark{display:none}.v4-world-container{min-height:440px}#v4-world-canvas{height:440px}.v4-world-foot{flex-direction:column;gap:3px}.v4-world-overlay-top,.v4-world-overlay-bottom{left:10px;right:10px}.v4-world-overlay-top{top:11px;flex-wrap:wrap}.v4-world-overlay-bottom{bottom:9px;max-width:calc(100% - 20px);align-items:flex-end}.v4-world-overlay-bottom #v4-near{max-width:69%;font-size:10px}.v4-touch-controls{bottom:67px;left:12px}.v4-portal-list{grid-template-columns:1fr}.v4-page-hero{padding:25px 21px;align-items:start;flex-direction:column}.v4-page-hero>strong{font-size:26px}.v4-metric-row{grid-template-columns:repeat(2,1fr)}.v4-buildings{grid-template-columns:1fr}.v4-grades-layout{grid-template-columns:1fr}.v4-shop-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.v4-answers{grid-template-columns:1fr}.v4-choice-grid{gap:5px}.v4-class{padding:13px 4px}.v4-class small{font-size:9px}.v4-lesson-header{flex-wrap:wrap}.v4-lesson-section p{font-size:13.5px}.v4-battle-stage{min-height:300px}.v4-battle-question{padding:18px}.v4-battle-question h2{font-size:24px}}
@media(max-width:420px){.v4-shop-grid{grid-template-columns:1fr 1fr;gap:8px}.v4-shop-item{padding:13px;min-height:190px}.v4-shop-item h3{font-size:16px}.v4-shop-footer{flex-wrap:wrap}.v4-shop-footer .btn{width:100%}.v4-class>span{font-size:25px}.v4-metric-row{gap:7px}.v4-metric-row>div{padding:13px}.v4-metric-row strong{font-size:26px}.v4-building{grid-template-columns:50px 1fr;gap:10px}.v4-building-icon{font-size:33px;height:55px}.v4-building h2{font-size:19px}.v4-action-row .btn{flex:1}.v4-world-overlay-top{font-size:10px}.v4-mini-tag{font-size:9px}}
@media print{.sidebar,.mobile-nav,.topbar,.notice,.section-foot,.v3-chapter-side,.v3-back,.v4-lesson-tools,.v4-hero-panel,.v4-page-hero{display:none!important}.shell,.main,.content{display:block;width:auto!important;max-width:none!important;padding:0!important}.v3-detail-grid{display:block!important}.v3-lesson{background:white!important;color:black!important;border:0!important;box-shadow:none!important}.v3-lesson p,.v3-lesson h2,.v3-lesson h3,.v4-lesson-section p,.v4-worked p,.v4-mistakes p{color:black!important}.v4-lesson-section{break-inside:avoid}.v4-worked,.v4-mistakes{background:white!important;box-shadow:none!important;border:1px solid #888!important}}
@media(prefers-reduced-motion:reduce){.v4-boss-halo,.v4-boss-creature{animation:none}}