/*  Base  */
:root{
    --bg:#f6f7fb;
    --panel:#ffffff;
    --text:#222;
    --muted:#6b7280;
    --accent:#3b82f6;
    --radius:12px;
    --gap:16px;
    --shadow:0 4px 12px rgba(0,0,0,.06);
    }
    
    *{ box-sizing:border-box; }
    html,body{ height:100%; }
    body{
    margin:0;
    font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
    color:var(--text);
    background:var(--bg);
    }
    
    /*  Header  */
    .tete{
    display: flex;
    align-items:center;
    justify-content:space-between;
    gap:var(--gap);
    padding:12px 16px;
    background:var(--panel);
    box-shadow:var(--shadow);
    position:sticky;
    top:0;
    z-index:10;
    }
    .tete h1{
    margin:0;
    font-size:20px;
    letter-spacing:.3px;
    }
    .search input{
    width: min(520px);
    padding:10px 12px;
    border:1px solid #e5e7eb;
    border-radius:20px;
    outline:none;
    }
    .search input:focus{
    border-color:var(--accent);
    }
    
    /*  Layout  */
    .layout{
    display:flex;
    min-height: calc(100vh - 60px);
    }
    
    /* Sidebar (gauche) */
    .sidebar{
    width:220px;
    padding:16px;
    }
    .menu{
    display:flex;
    flex-direction:column;
    gap:10px;
    }
    .menu .btn{
    display:block;
    padding:12px 14px;
    text-decoration:none;
    color:var(--text);
    background:var(--panel);
    border:1px solid #e0e2e6;
    border-radius:var(--radius);
    box-shadow:var(--shadow);
    font-weight:600;
    transition:transform .15s, background .15s;
    }
    .menu .btn:hover{ transform:translateX(4px); }
    .menu .btn.active{
    background:#eef2ff;
    border-color:#c7d2fe;
    }
    
    /* Zone contenu (droite) */
    .content{
    flex:1;
    padding:16px;
    }
    
 
    /* grille 3 colonnes pour grands écrans */
    .dashboard{
    display:grid;
    grid-template-columns: 2fr 1fr 1fr; 
    grid-auto-rows: 160px;
    gap:var(--gap);
    }
    
    /* Cartes génériques */
    .card{
    background:var(--panel);
    border:1px solid #e5e7eb;
    border-radius:var(--radius);
    box-shadow:var(--shadow);
    padding:12px;
    display:flex;
    align-items:center;
    justify-content:center;
    font-weight:600;
    color:var(--muted);
    }

    .card-line{ 
    grid-column: 1 / span 2;
    grid-row: span 2;
    }
    .card-small{ 
    grid-column: 3 / span 1;
    grid-row: span 1;
    } 
   
    .card-tiles{ 
    grid-column: 3 / span 1;
    grid-row: span 1;
    }
    .card-bars{ 
    grid-column: 1 / span 2;
    grid-row: span 2;
    }
    .card-rings{ 
    grid-column: 3 / span 1;
    grid-row: span 2;
    gap:24px;
    }
    
    /* Les deux ronds  */
    .ring{
    width:120px; height:120px;
    border:10px solid #eceef1;
    border-radius:50%;
    }

        /*  Responsive  */
    /* Moyen écran: 2 colonnes */
    @media (max-width: 1100px){
        .dashboard{
        grid-template-columns: 1fr 1fr;
        }
        .card-line{ grid-column: 1 / span 2; }
        .card-small{ grid-column:auto; }
        .card-bars{ grid-column: 1 / span 2; }
        .card-rings{ grid-column: 1 / span 2; flex-wrap:wrap; }
        }

            /* Petit écran*/
    @media (max-width: 750px){
        .layout{ flex-direction:column; }
        .sidebar{ width:auto; padding:12px 16px; }
        .menu{ flex-direction:row; flex-wrap:wrap; }
        .menu .btn{ flex:1 1 140px; }
        .content{ padding:12px; }
        .dashboard{ grid-template-columns: 1fr; }
        .card-line,
        .card-bars,
        .card-rings{ grid-column: 1; }
        .ring{ width:90px; height:90px; }
        }