:root{font:16px/1.5 system-ui,-apple-system,Segoe UI,sans-serif;color:#203340;background:#f4f8f7}*{box-sizing:border-box}body{margin:0;min-height:100vh}header{background:#123746;color:white;padding:18px max(20px,calc((100vw - 1160px)/2));display:flex;justify-content:space-between;align-items:center;gap:12px}header a{color:#fff;text-decoration:none}.brand{font-size:20px;letter-spacing:.4px}nav{display:flex;gap:12px;align-items:center}main{max-width:1160px;margin:38px auto;padding:0 20px;min-height:70vh}h1{font-size:clamp(30px,4vw,48px);line-height:1.16;margin:8px 0 16px}h2{margin:0 0 14px;color:#133b43}h3{margin:8px 0}p{margin:8px 0 18px}.lead{font-size:19px;color:#52696d}.eyebrow{color:#21867d;text-transform:uppercase;font-weight:800;letter-spacing:.12em;font-size:12px}.card{background:white;border:1px solid #dde9e6;border-radius:18px;padding:24px;box-shadow:0 6px 25px #143e470a;margin-bottom:20px}.hero{padding:36px 0 26px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}.stack{display:grid;gap:12px}.muted{color:#6d8185}.tiny{font-size:12px}.badge{display:inline-block;background:#dff4ef;color:#17635a;padding:3px 9px;border-radius:30px;font-size:12px;margin:3px}.tabs{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0}.tabs button{border-radius:24px}.tabs .active{background:#123746;color:white}button,.button{background:#138b7d;color:white;border:0;border-radius:11px;padding:11px 17px;font:inherit;font-weight:650;cursor:pointer}button:hover{filter:brightness(.93)}button:disabled{opacity:.5;cursor:not-allowed}.ghost{background:#e6f3f0;color:#15443f}.danger{background:#a33145}input,select,textarea{font:inherit;border:1px solid #bdd2d0;border-radius:9px;padding:11px;width:100%;background:#fff;color:#213c42}textarea{min-height:120px;resize:vertical}label{display:block;font-weight:650;margin-bottom:12px}label input,label select,label textarea{margin-top:5px}form{max-width:760px}form button{margin-top:8px}.row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.row>*{flex:1}.row button{flex:0 0 auto}.item{padding:16px 0;border-bottom:1px solid #e5eeec}.item:last-child{border-bottom:0}.notice{padding:14px;border-left:4px solid #168b81;background:#eaf9f4;border-radius:8px;margin:12px 0}.error{background:#ffe9ec;border-left-color:#b73443}.empty{padding:30px;text-align:center;color:#6c8286;border:1px dashed #cadbd8;border-radius:12px}.detail{white-space:pre-wrap;background:#f5f9f8;border-radius:12px;padding:18px}.metrics{display:flex;gap:14px;flex-wrap:wrap}.metric{background:#eaf6f3;border-radius:12px;padding:14px 22px;min-width:140px}.metric b{display:block;font-size:25px}a{color:#097c73}footer{text-align:center;color:#79918f;font-size:13px;padding:35px 15px}#who{font-size:13px}@media(max-width:600px){header{padding:16px}main{margin:15px auto}.card{padding:18px}.row>*{flex-basis:100%}}

/* Tableau de bord MATH'MA SCIENCE */
.dashboard-welcome{display:flex;justify-content:space-between;gap:20px;align-items:center;background:linear-gradient(110deg,#e2f6f0,#f7fbfa);border:1px solid #d5ebe5;border-radius:20px;padding:22px 26px;margin:20px 0}.dashboard-welcome h2{font-size:clamp(22px,3vw,31px);margin:4px 0}.dashboard-welcome p{margin-bottom:0;color:#4d6668}.dashboard-date{white-space:nowrap;color:#1e716b;font-size:13px;font-weight:700}.dashboard-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:0 0 20px}.stat-card{min-height:150px;background:white;border:1px solid #dcebe8;border-radius:17px;color:#173b45;text-align:left;padding:17px;display:flex;flex-direction:column;gap:9px;box-shadow:0 4px 14px #12374608}.stat-card:hover{border-color:#20a293;transform:translateY(-1px)}.stat-card strong{font-size:clamp(22px,3vw,32px);line-height:1}.stat-card>span:last-child{font-size:14px;color:#597277}.stat-top{display:flex;justify-content:space-between;font-size:20px}.stat-top span{font-size:16px;color:#299184}.dashboard-columns{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(280px,1fr);gap:20px}.dashboard-columns>.card,.dashboard-columns>div{min-width:0}.card-heading{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:14px}.card-heading h2{font-size:20px;margin:0}.card-heading button{font-size:13px;padding:7px 10px}.week-chart{height:210px;display:grid;grid-template-columns:repeat(7,1fr);gap:12px;padding:10px 5px 0}.week-day{display:flex;align-items:center;flex-direction:column;gap:8px;color:#638082;font-size:12px}.week-day strong{font-size:11px;height:18px;white-space:nowrap}.week-bar-track{height:145px;width:100%;max-width:35px;display:flex;align-items:flex-end;border-radius:10px;background:#eef6f4;overflow:hidden}.week-bar{width:100%;background:linear-gradient(0deg,#118b7b,#7bd2bc);border-radius:9px 9px 0 0}.activity-row{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid #e8f0ed}.activity-row:last-child{border-bottom:0}.activity-row p{margin:4px 0 0;font-size:13px}.activity-row b{font-size:14px}.activity-row button{padding:7px 12px}.quick-actions{display:grid;gap:8px}.quick-action{display:flex;align-items:center;justify-content:space-between;background:#eef8f5;color:#164b49;text-align:left;font-size:14px}.principle{background:#e9f6f2}.principle p{margin-bottom:0}@media(max-width:900px){.dashboard-stats{grid-template-columns:repeat(2,minmax(0,1fr))}.dashboard-columns{grid-template-columns:1fr}}@media(max-width:600px){.dashboard-welcome{display:block;padding:18px}.dashboard-date{display:block;margin-top:12px}.dashboard-stats{gap:8px}.stat-card{min-height:135px;padding:12px}.week-chart{gap:5px}}

.invite-box{border:1px solid #b4d7d0;border-radius:16px;padding:20px;margin:16px 0;background:#f3faf8}.invite-box form{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}.invite-box label{display:block}.invite-box button{align-self:end}.card-heading{flex-wrap:wrap;gap:12px}

/* V5 : recherche, favoris et fiches */
.action-row{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:10px 0}.action-row button{padding:7px 11px;font-size:13px}.edit-box{background:#eff9f5;border-radius:12px;padding:16px;margin:14px 0}.item details{margin-top:9px}.item summary{cursor:pointer;color:#176c63;font-weight:600}#site-search{font-size:18px;padding:14px}.tabs{position:relative}button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #52c5b1;outline-offset:2px}

.library-group{margin:1.6rem 0 .6rem;padding:.7rem 1rem;background:#e9f6f0;border-radius:10px;font-size:1.05rem}details>summary{cursor:pointer;padding:.6rem 0}

.attached-files{margin:.65rem 0;padding:.65rem;border:1px dashed #9bb6aa;border-radius:10px}.attach-form input[type=file]{padding:.8rem;background:#fff;border:2px dashed #9bb6aa}.attach-form input[type=file]:focus{outline:3px solid #216b56}select[multiple]{min-height:9rem}.item details{margin-top:.6rem}

/* V7 : prise de photo et galerie sur mobile */
.upload-picker{border:1px solid #bedbd2;border-radius:12px;padding:14px;margin:14px 0;background:#f4faf8}.upload-picker legend{font-weight:750;color:#164d47;padding:0 5px}.upload-picker label{font-size:14px;padding:8px 0;margin:0}.upload-picker input[type=file]{display:block;width:100%;padding:10px;border:1px dashed #8dbdaf;background:white}.upload-picker p{margin:8px 0 0}

/* V7 : prise de photo et galerie sur mobile */
.upload-picker{border:1px solid #bedbd2;border-radius:12px;padding:14px;margin:14px 0;background:#f4faf8}.upload-picker legend{font-weight:750;color:#164d47;padding:0 5px}.upload-picker label{font-size:14px;padding:8px 0;margin:0}.upload-picker input[type=file]{display:block;width:100%;padding:10px;border:1px dashed #8dbdaf;background:white}.upload-picker p{margin:8px 0 0}