:root {
    --bleu-nuit: #1b2a4a;
    --bleu-accent: #2f6fed;
    --gris-fond: #f4f6f9;
    --rouge-alerte: #d64545;
    --vert-ok: #2fa85a;
    --bordure: #dde3ec;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: 'Segoe UI', Roboto, Arial, sans-serif;
    background: var(--gris-fond);
    color: #1c2733;
}

.entete-app {
    background: var(--bleu-nuit);
    color: #fff;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 28px;
}
.entete-app .logo { font-weight: 700; font-size: 1.1rem; }
.entete-app .logo span { font-weight: 400; opacity: .8; }
.entete-app nav a {
    color: #fff; text-decoration: none; margin-left: 18px; font-size: .95rem;
}
.entete-app nav a:hover { text-decoration: underline; }
.entete-app .utilisateur { margin-left: 18px; opacity: .85; }

.conteneur { max-width: 1100px; margin: 30px auto; padding: 0 20px; }

.ligne-titre { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.filtre-periode { display: flex; gap: 8px; align-items: center; }

.table-stock {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    margin-top: 16px;
    box-shadow: 0 1px 4px rgba(0,0,0,.06);
}
.table-stock th, .table-stock td {
    border: 1px solid var(--bordure);
    padding: 9px 12px;
    text-align: center;
    font-size: .93rem;
}
.table-stock th { background: var(--bleu-nuit); color: #fff; font-weight: 600; }
.table-stock tbody tr:nth-child(even) { background: #fafbfd; }
.table-stock .ligne-total { font-weight: 700; background: #eef2fb; }
.ligne-alerte { background: #fdeceb !important; }
.bandeau-alerte {
    background: #fff4e5; border: 1px solid #f3c98a; color: #8a5a00;
    padding: 10px 14px; border-radius: 6px; margin-top: 14px; font-size: .92rem;
}

.formulaire-saisie {
    display: flex; flex-wrap: wrap; gap: 14px; align-items: flex-end;
    background: #fff; padding: 16px; border-radius: 8px; margin-top: 16px;
    border: 1px solid var(--bordure);
}
.formulaire-saisie label { display: flex; flex-direction: column; font-size: .85rem; gap: 4px; }
.formulaire-saisie input, .formulaire-saisie select {
    padding: 7px 9px; border: 1px solid var(--bordure); border-radius: 5px;
}
.formulaire-saisie button {
    background: var(--bleu-accent); color: #fff; border: none; padding: 9px 18px;
    border-radius: 5px; cursor: pointer; font-weight: 600;
}
.formulaire-saisie button:hover { background: #2557c4; }

.bouton-pdf {
    background: var(--vert-ok); color: #fff; padding: 8px 14px; border-radius: 5px;
    text-decoration: none; font-weight: 600; font-size: .88rem;
}
.bouton-pdf:hover { opacity: .9; }
#graphiqueStock { background: #fff; border: 1px solid var(--bordure); border-radius: 8px; padding: 10px; margin-top: 18px; max-height: 260px; }

.message-erreur { color: var(--rouge-alerte); font-weight: 600; }
.note { font-size: .85rem; color: #55627a; margin-top: 6px; }

.page-connexion {
    display: flex; align-items: center; justify-content: center; height: 100vh;
}
.carte-connexion {
    background: #fff; padding: 34px 40px; border-radius: 10px; width: 320px;
    box-shadow: 0 4px 18px rgba(0,0,0,.1); text-align: center;
}
.carte-connexion h1 { margin: 0; color: var(--bleu-nuit); }
.carte-connexion form { display: flex; flex-direction: column; gap: 14px; margin-top: 18px; text-align: left; }
.carte-connexion input {
    padding: 8px 10px; border: 1px solid var(--bordure); border-radius: 5px; margin-top: 4px;
}
.carte-connexion button {
    background: var(--bleu-accent); color: #fff; border: none; padding: 10px; border-radius: 5px;
    font-weight: 600; cursor: pointer;
}