:root{--ink:#293238;--muted:#687477;--cream:#fff7e7;--teal:#129a98;--teal-dark:#08716f;--orange:#ee7445;--gold:#e5ad32;--forest:#405b39;--paper:#fffdf8;--line:#dce7e2;font-family:Inter,ui-rounded,"Segoe UI",sans-serif;color:var(--ink);background:var(--cream)}
*{box-sizing:border-box}body{margin:0;min-width:320px;background:radial-gradient(circle at 10% 0,#e5f5ef 0,transparent 30%),var(--cream)}a{color:inherit;text-decoration:none}.topbar{height:82px;display:flex;align-items:center;justify-content:space-between;padding:0 clamp(20px,5vw,80px);background:rgba(255,255,255,.9);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10;backdrop-filter:blur(12px)}.brand{display:flex;align-items:center;gap:12px}.brand-mark{display:grid;place-items:center;width:45px;height:45px;border-radius:15px;background:var(--teal);color:#fff;font-size:24px;font-weight:900;transform:rotate(-4deg)}.brand span:last-child{display:flex;flex-direction:column}.brand small{font-size:11px;color:var(--muted);margin-top:2px}.topbar nav{display:flex;gap:28px;font-weight:700;font-size:14px}.topbar nav a:hover{color:var(--orange)}main{min-height:calc(100vh - 140px)}.hero{min-height:520px;display:grid;grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr);align-items:center;gap:20px;padding:50px clamp(24px,8vw,130px) 0;overflow:hidden}.hero-copy{position:relative;z-index:2}.eyebrow{text-transform:uppercase;letter-spacing:.13em;font-size:12px;font-weight:900;color:var(--orange)}h1{font-size:clamp(42px,6vw,82px);line-height:.98;letter-spacing:-.05em;margin:15px 0 22px}h1 em{font-style:normal;color:var(--teal)}.hero p{max-width:650px;font-size:clamp(17px,2vw,21px);line-height:1.6;color:var(--muted)}.mascot{align-self:end;width:min(100%,470px);max-height:500px;object-fit:cover;object-position:top center;border-radius:48% 48% 22% 22%;filter:drop-shadow(0 24px 28px rgba(18,78,71,.18))}.level-picker{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}.level-chip{background:#fff;border:1px solid var(--line);border-radius:16px;padding:11px 16px;font-weight:800;display:flex;flex-direction:column;min-width:92px}.level-chip small{font-weight:500;color:var(--muted)}.level-chip.active{background:var(--teal);color:#fff;box-shadow:0 8px 20px rgba(12,107,99,.22)}.level-chip.active small{color:#cdece7}.library{padding:60px clamp(24px,6vw,100px) 90px;background:#f6fbf9;border-radius:50px 50px 0 0}.section-heading{display:flex;justify-content:space-between;align-items:end;margin-bottom:28px}.section-heading h2{font-size:clamp(30px,4vw,50px);margin:6px 0}.section-heading p{color:var(--muted)}.workbook-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.workbook-card{--accent:var(--teal);min-height:300px;padding:30px 28px 24px 42px;border-radius:12px 28px 28px 12px;background:linear-gradient(145deg,color-mix(in srgb,var(--accent) 90%,white),var(--accent));color:#fff;box-shadow:0 15px 30px color-mix(in srgb,var(--accent) 22%,transparent);position:relative;overflow:hidden;transition:.2s transform,.2s box-shadow}.workbook-card:hover{transform:translateY(-6px) rotate(-.5deg);box-shadow:0 22px 40px color-mix(in srgb,var(--accent) 30%,transparent)}.workbook-spine{position:absolute;inset:0 auto 0 14px;width:9px;border-left:2px solid rgba(255,255,255,.3);border-right:2px solid rgba(0,0,0,.1)}.workbook-icon{font-size:34px}.workbook-card .subject{text-transform:uppercase;letter-spacing:.12em;font-size:11px;font-weight:900;opacity:.8}.workbook-card h3{font-size:28px;line-height:1.08;margin:18px 0 10px}.workbook-card p{opacity:.82}.workbook-meta{position:absolute;left:42px;right:26px;bottom:24px;display:flex;justify-content:space-between;align-items:center;font-size:13px}.workbook-header{padding:65px clamp(24px,8vw,130px);background:linear-gradient(135deg,color-mix(in srgb,var(--accent) 14%,white),#fff)}.workbook-header>a{font-weight:800;color:var(--teal)}.workbook-header h1{font-size:clamp(44px,7vw,76px)}.exercise-list{max-width:1100px;margin:0 auto;padding:40px 24px 90px}.exercise-row{display:grid;grid-template-columns:58px 1fr auto auto;align-items:center;gap:20px;background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px 22px;margin-bottom:14px;box-shadow:0 8px 20px rgba(19,67,63,.05)}.exercise-number{width:48px;height:48px;display:grid;place-items:center;border-radius:16px;background:#e4f4ef;color:var(--teal);font-size:20px;font-weight:900}.exercise-copy span,.exercise-copy small{font-size:12px;color:var(--muted)}.exercise-copy h2{font-size:19px;margin:4px 0}.exercise-row button{border:0;background:var(--teal);color:#fff;border-radius:14px;padding:13px 18px;font-weight:900}.exercise-row button:disabled{background:#c8d2d0}.free-badge{background:#fff0ca;color:#8d5b00;border-radius:999px;padding:7px 11px;font-size:12px;font-weight:900}.locked{opacity:.7}.empty-state{grid-column:1/-1;padding:50px;text-align:center;background:#fff;border:2px dashed var(--line);border-radius:24px;color:var(--muted)}footer{text-align:center;padding:24px;color:var(--muted);font-size:13px;background:#fff}
@media(max-width:900px){.topbar nav a:not(:first-child){display:none}.hero{grid-template-columns:1fr;padding-top:45px}.mascot{max-height:360px;justify-self:center}.workbook-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.exercise-row{grid-template-columns:52px 1fr auto}.exercise-row button{grid-column:2/-1}.free-badge{align-self:start}}
@media(max-width:560px){.topbar{height:70px}.brand small{display:none}.hero{padding-inline:20px}.hero h1{font-size:45px}.mascot{max-height:320px}.library{padding-inline:18px;border-radius:28px 28px 0 0}.section-heading{align-items:start;flex-direction:column}.workbook-grid{grid-template-columns:1fr}.workbook-card{min-height:260px}.exercise-row{grid-template-columns:46px 1fr;padding:16px;gap:12px}.exercise-number{width:42px;height:42px}.free-badge{grid-column:2}.exercise-row button{grid-column:1/-1;width:100%;min-height:48px}}
@media(min-width:1800px){.hero{min-height:650px}.workbook-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.workbook-card{min-height:340px}}
.start-button{background:var(--teal);color:#fff;border-radius:14px;padding:13px 18px;font-weight:900;text-align:center}.exercise-hero{padding:55px clamp(24px,8vw,130px) 35px;background:#e9f6f2}.exercise-hero h1{font-size:clamp(36px,6vw,68px);max-width:1000px}.reading-panel,.question-sheet,.correction-list{max-width:1050px;margin:28px auto;padding:0 22px}.reading-panel{background:#fff;border:1px solid var(--line);border-radius:22px;padding:25px;line-height:1.7}.reading-toolbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.reading-toolbar button{border:0;background:var(--orange);color:#fff;padding:10px 14px;border-radius:12px;font-weight:800}.hidden-reading{visibility:hidden;min-height:180px}.speed-control{display:flex;align-items:center;gap:14px;background:#fff;padding:18px;border-radius:18px;margin-bottom:20px;font-weight:800}.speed-control input{flex:1}.question-card{border:1px solid var(--line);background:#fff;border-radius:22px;padding:22px;margin:0 0 16px}.question-card legend{font-size:18px;font-weight:800;padding:0 8px}.question-card legend span{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:11px;background:#e4f4ef;color:var(--teal);margin-right:10px}.choice-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:16px}.choice-grid label input{position:absolute;opacity:0}.choice-grid label span{display:block;border:2px solid var(--line);border-radius:14px;padding:14px;cursor:pointer}.choice-grid label input:checked+span{border-color:var(--teal);background:#e4f4ef}.open-answer{width:100%;margin-top:15px;border:2px solid var(--line);border-radius:14px;padding:15px;font:inherit}.open-answer:focus{outline:3px solid #b9e4db;border-color:var(--teal)}.submit-exercise,.return-button{display:block;border:0;border-radius:16px;background:var(--orange);color:#fff;font-weight:900;font-size:17px;padding:16px 25px;margin:28px auto;min-height:54px}.result-hero{text-align:center;padding:55px 20px 30px;background:#e9f6f2}.result-hero h1{color:var(--teal);margin:12px}.result-hero h1 small{font-size:.35em}.correction{display:grid;grid-template-columns:42px 1fr;gap:14px;padding:18px;border-radius:17px;margin-bottom:10px;background:#fff;border:1px solid var(--line)}.correction>span{display:grid;place-items:center;width:38px;height:38px;border-radius:50%;font-weight:900}.correction.correct>span{background:#d9f4e7;color:#08754b}.correction.incorrect>span{background:#ffe1da;color:#b73e24}.correction p{margin:5px 0;color:var(--muted)}.standalone{max-width:850px;margin:80px auto}.standalone h1{font-size:45px}
@media(max-width:560px){.choice-grid{grid-template-columns:1fr}.reading-toolbar{align-items:flex-start;gap:14px;flex-direction:column}.speed-control{align-items:flex-start;flex-direction:column}.speed-control input{width:100%}}

/* Navigation pédagogique : matière → sous-matière → série */
.catalog-tree{display:grid;gap:28px}.subject-panel{background:var(--paper);border:1px solid var(--line);border-radius:30px;overflow:hidden;box-shadow:0 18px 45px rgba(41,50,56,.07)}.subject-heading{display:flex;align-items:center;gap:16px;padding:24px 28px;background:linear-gradient(105deg,color-mix(in srgb,var(--accent) 15%,var(--paper)),var(--paper))}.subject-heading h3{font-size:clamp(25px,3vw,36px);margin:2px 0}.subject-heading div>span,.topic-panel summary small,.series-copy small{text-transform:uppercase;letter-spacing:.12em;font-size:10px;font-weight:900;color:var(--muted)}.subject-icon{display:grid;place-items:center;width:56px;height:56px;border-radius:18px;background:var(--accent);color:#fff;font-size:24px;font-weight:950}.topic-list{padding:10px 20px 22px}.topic-panel{border-top:1px solid var(--line)}.topic-panel:first-child{border-top:0}.topic-panel summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:19px 8px;cursor:pointer}.topic-panel summary::-webkit-details-marker{display:none}.topic-panel summary>span:first-child{display:flex;flex-direction:column;gap:4px}.topic-panel summary strong{font-size:18px}.topic-panel summary:after{content:'+';display:grid;place-items:center;width:34px;height:34px;border-radius:12px;background:#e3f5f2;color:var(--teal-dark);font-size:23px;font-weight:700;order:3}.topic-panel[open] summary:after{content:'–';background:var(--teal);color:#fff}.series-count{margin-left:auto;border-radius:999px;background:#f1f4f2;padding:7px 11px;color:var(--muted);font-size:12px;font-weight:800}.series-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;padding:0 6px 22px}.series-card{display:grid;grid-template-columns:42px 1fr 28px;align-items:center;gap:12px;min-height:92px;padding:15px;border:1px solid var(--line);border-radius:18px;background:#fff;transition:transform .18s,border-color .18s,box-shadow .18s}.series-card:hover{transform:translateY(-2px);border-color:var(--teal);box-shadow:0 10px 24px rgba(18,154,152,.12)}.series-folder{width:38px;height:31px;border-radius:5px 7px 7px 7px;background:var(--gold);position:relative}.series-folder:before{content:'';position:absolute;left:0;top:-7px;width:20px;height:9px;border-radius:5px 5px 0 0;background:var(--gold)}.series-copy{min-width:0;display:flex;flex-direction:column;gap:3px}.series-copy strong{font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.series-copy>span{font-size:12px;color:var(--muted)}.series-arrow{color:var(--teal-dark);font-size:22px;font-weight:900}.level-chip{min-width:145px}.level-chip small{margin-top:3px}.library{background:#f5fbf8}.mascot{background:var(--teal);object-fit:cover}
@media(max-width:1000px){.series-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:620px){.series-grid{grid-template-columns:1fr}.subject-heading{padding:20px}.topic-list{padding-inline:12px}.topic-panel summary{align-items:flex-start}.series-count{display:none}.level-chip{min-width:calc(50% - 6px);font-size:13px}.catalog-tree{gap:18px}}
.result-mascot{width:150px;height:150px;object-fit:cover;object-position:top;border-radius:50%;border:6px solid #fff;box-shadow:0 12px 30px rgba(18,154,152,.2)}