:root {
    --primaire: #2563eb;
    --succes: #10b981;
    --attention: #f59e0b;
    --danger: #ef4444;
    --texte: #1f2937;
    --texte-clair: #6b7280;
    --fond: #f8fafc;
    --blanc: #ffffff;
    --ombre: 0 2px 8px rgba(0,0,0,.08);
    --rayon: 12px;
}

* { margin: 0; padding: 0; box-sizing: border-box; font: inherit; }
body {
    font-family: system-ui, -apple-system, sans-serif;
    background: var(--fond);
    color: var(--texte);
    line-height: 1.5;
    padding-bottom: 70px;
}

.page-login {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    background: var(--blanc);
    padding: 2rem;
    border-radius: var(--rayon);
    box-shadow: var(--ombre);
    width: 100%;
    max-width: 400px;
}

h1, h2, h3, h4 { margin-bottom: .5rem; font-weight: 600; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1.25rem; }

.sous-titre, .intro { color: var(--texte-clair); margin-bottom: 1.5rem; }
.conteneur { padding: 1rem; max-width: 700px; margin: 0 auto; }

label { display: block; margin: 1rem 0 .25rem; font-weight: 500; }
input {
    width: 100%; padding: .75rem; border: 1px solid #e5e7eb;
    border-radius: 8px; font-size: 1rem;
}

.btn-primaire {
    width: 100%; padding: .875rem; background: var(--primaire);
    color: white; border: none; border-radius: 8px; font-size: 1rem;
    font-weight: 500; margin-top: 1rem; cursor: pointer;
    transition: transform .1s;
}
.btn-primaire:active { transform: scale(.98); }

.alerte {
    background: #fef2f2; color: #dc2626; padding: .75rem;
    border-radius: 8px; margin: 1rem 0;
}

.info { margin-top: 1rem; font-size: .875rem; color: var(--texte-clair); }

.carte, .carte-enfant {
    background: var(--blanc); padding: 1.25rem; border-radius: var(--rayon);
    box-shadow: var(--ombre); margin-bottom: 1rem; text-decoration: none;
    color: inherit; display: block; transition: transform .2s;
}
.carte-enfant:active { transform: scale(.99); }

.classe, .annee, .date { color: var(--texte-clair); font-size: .875rem; }

.liens { margin-top: 1rem; display: flex; flex-wrap: wrap; gap: .5rem; }
.lien-bouton {
    padding: .5rem .75rem; background: #eff6ff; color: var(--primaire);
    border-radius: 6px; text-decoration: none; font-size: .875rem;
}

.tableau { display: flex; flex-direction: column; gap: .75rem; margin-top: .5rem; }
.ligne {
    background: #fafafa; padding: .75rem; border-radius: 6px;
    border-left: 3px solid #ddd;
}

.statut-payé { border-color: var(--succes); color: var(--succes); }
.statut-à-venir { border-color: var(--attention); color: var(--attention); }
.statut-partiellement-payé { border-color: var(--attention); color: var(--attention); }
.statut-en-retard { border-color: var(--danger); color: var(--danger); }

.moyenne-finale { font-size: 1.125rem; margin-top: .5rem; }

.nav-basse {
    position: fixed; bottom: 0; left: 0; right: 0;
    background: var(--blanc); box-shadow: 0 -2px 8px rgba(0,0,0,.06);
    display: flex; justify-content: space-around; padding: .75rem 0;
    z-index: 100;
}
.nav-basse a {
    text-decoration: none; color: var(--texte-clair);
    text-align: center; font-size: .875rem;
}
.nav-basse a.actif { color: var(--primaire); font-weight: 600; }

.pied {
    text-align: center; padding: 1rem; font-size: .75rem;
    color: var(--texte-clair); margin-top: 2rem;
}

section { margin-bottom: 2rem; }