* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, sans-serif; color: #1a1a1a; background: #f6f7f9; }
.barre { display: flex; justify-content: space-between; align-items: center; padding: .8rem 1rem; background: #234; color: #fff; flex-wrap: wrap; gap: .5rem; }
.barre a, .marque { color: #fff; text-decoration: none; margin-right: 1rem; }
.marque { font-weight: 700; }
.inline { display: inline; }
.contenu { max-width: 900px; margin: 1rem auto; padding: 0 1rem; }
.carte { background: #fff; border-radius: 8px; padding: 1rem; margin-bottom: 1rem; box-shadow: 0 1px 3px rgba(0,0,0,.08); }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .5rem; border-bottom: 1px solid #eee; }
.btn, button { background: #234; color: #fff; border: 0; border-radius: 6px; padding: .5rem .9rem; cursor: pointer; text-decoration: none; display: inline-block; }
label { display: block; margin: .6rem 0 .2rem; font-weight: 600; }
input, select { width: 100%; padding: .5rem; border: 1px solid #ccc; border-radius: 6px; }
.messages { list-style: none; padding: 0; }
.messages li { background: #e6f4ea; padding: .5rem; border-radius: 6px; }
.solde-positif { color: #167a3b; } .solde-negatif { color: #b3261e; }