/* ============================================================
   DEVOIRS — /styles/devoirs.css
   Charte reprise de evaluations.css (dégradé violet, cartes blanches)
   ============================================================ */
body.dv-page {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh; margin: 0; padding: 20px; box-sizing: border-box;
}
.dv-container { max-width: 1200px; margin: 0 auto; }
.dv-back {
    display: inline-flex; gap: 8px; color: #fff; text-decoration: none;
    margin-bottom: 20px; padding: 10px 15px; background: rgba(255,255,255,.2); border-radius: 8px;
}
.dv-back:hover { background: rgba(255,255,255,.3); }

.dv-card {
    background: #fff; border-radius: 16px; padding: 24px 28px; margin-bottom: 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,.1);
}
.dv-head { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.dv-head h1 { font-size: 26px; color: #333; margin: 0; }
.dv-head p  { color: #666; margin: 4px 0 0; }
.dv-card h2 { color: #667eea; font-size: 20px; margin: 0 0 16px; }

/* Boutons */
.dv-btn {
    padding: 10px 20px; border: none; border-radius: 8px; font-size: 14px; font-weight: 600;
    cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: 6px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: #fff;
}
.dv-btn:hover { box-shadow: 0 4px 12px rgba(102,126,234,.4); }
.dv-btn-light  { background: #f0f2ff; color: #667eea; }
.dv-btn-danger { background: #ffe5e5; color: #dc3545; }
.dv-btn-small  { padding: 5px 10px; font-size: 12px; }
.dv-btn:disabled { opacity: .5; cursor: default; box-shadow: none; }

/* Formulaires */
.dv-form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; }
.dv-field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.dv-field label { font-weight: 600; font-size: 14px; color: #444; }
.dv-field input, .dv-field select, .dv-field textarea {
    padding: 10px; border: 2px solid #e0e0e0; border-radius: 8px; font-size: 15px; font-family: inherit;
}
.dv-field textarea { min-height: 110px; resize: vertical; }
.dv-field input:focus, .dv-field select:focus, .dv-field textarea:focus { outline: none; border-color: #667eea; }
.dv-hint { font-size: 12px; color: #888; }
.dv-checks { display: flex; flex-wrap: wrap; gap: 8px; }
.dv-check {
    display: inline-flex; align-items: center; gap: 6px; padding: 6px 10px;
    border: 2px solid #e0e0e0; border-radius: 8px; background: #fafafa; font-size: 13px; cursor: pointer;
}
.dv-check:has(input:checked) { border-color: #667eea; background: #eef0ff; }

/* Listes */
.dv-list { display: flex; flex-direction: column; gap: 10px; }
.dv-row {
    display: flex; align-items: center; gap: 14px; padding: 12px 16px; background: #f8f9ff;
    border-radius: 10px; border-left: 5px solid #cbd0f5; flex-wrap: wrap;
}
.dv-row.status-draft  { border-left-color: #c9a400; }
.dv-row.status-active { border-left-color: #28a745; }
.dv-row.status-closed { border-left-color: #dc3545; }
.dv-row-title { flex: 1 1 240px; font-weight: 700; color: #222; }
.dv-row-meta  { color: #666; font-size: 13px; display: flex; gap: 12px; flex-wrap: wrap; }
.dv-row-actions { display: flex; gap: 6px; }
.dv-tag {
    display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 11.5px; font-weight: 600;
    background: #eef0ff; color: #4a5ab9; margin: 1px;
}
.dv-tag-alert { background: #fff3cd; color: #856404; }
.dv-empty { text-align: center; color: #666; padding: 30px; }

/* Éditeur de champs de réponse */
.dv-champ { display: grid; grid-template-columns: 2fr 3fr 1fr 1fr auto; gap: 8px; margin-bottom: 8px; align-items: center; }
.dv-champ input { padding: 8px; border: 2px solid #e0e0e0; border-radius: 6px; font-size: 14px; }
@media (max-width: 700px) { .dv-champ { grid-template-columns: 1fr 1fr; } }

/* Modale */
.dv-modal-bg {
    position: fixed; inset: 0; background: rgba(0,0,0,.45); display: none;
    align-items: flex-start; justify-content: center; padding: 30px 12px; overflow-y: auto; z-index: 100;
}
.dv-modal-bg.open { display: flex; }
.dv-modal { background: #fff; border-radius: 16px; padding: 24px; width: 100%; max-width: 820px; }

/* Grille de suivi */
.dv-table-wrap { overflow-x: auto; }
.dv-table { border-collapse: collapse; width: 100%; font-size: 13px; }
.dv-table th, .dv-table td { border: 1px solid #e8e8f5; padding: 6px 8px; text-align: center; }
.dv-table th { background: #eef0ff; color: #444; }
.dv-table td.dv-name { text-align: left; white-space: nowrap; }
.dv-cell { cursor: pointer; border-radius: 6px; padding: 4px 6px; display: inline-block; min-width: 44px; }
.dv-cell-ok      { background: #d4edda; color: #155724; }
.dv-cell-partiel { background: #fff3cd; color: #856404; }
.dv-cell-ko      { background: #f8d7da; color: #721c24; }
.dv-cell-avalider{ background: #ffe8cc; color: #8a4b00; font-weight: 700; }
.dv-cell-valide  { background: #cfe2ff; color: #084298; }
.dv-cell-vide    { color: #bbb; cursor: default; }

/* Côté élève */
.dv-exo { border: 2px solid #eef0ff; border-radius: 12px; padding: 18px; margin-bottom: 16px; }
.dv-exo h3 { margin: 0 0 10px; color: #333; }
.dv-exo-img { max-width: 100%; border-radius: 8px; margin: 10px 0; }
.dv-enonce { line-height: 1.6; white-space: pre-wrap; }
.dv-answer { display: flex; align-items: center; gap: 8px; margin: 8px 0; flex-wrap: wrap; }
.dv-answer input { padding: 8px; border: 2px solid #e0e0e0; border-radius: 6px; font-size: 15px; width: 160px; }
.dv-answer input.ok { border-color: #28a745; background: #f0fff4; }
.dv-answer input.ko { border-color: #dc3545; background: #fff5f5; }
.dv-feedback { margin-top: 10px; font-weight: 600; }
.dv-feedback.ok { color: #155724; }
.dv-feedback.ko { color: #721c24; }
.dv-feedback.wait { color: #8a4b00; }
.dv-progress { height: 8px; background: #eee; border-radius: 4px; overflow: hidden; margin-top: 8px; }
.dv-progress > div { height: 100%; background: #28a745; }

/* Figures géométriques (Lot 2) */
.dv-geo { margin: 10px 0; }
.dv-geo .geo-embed-frame { width: 100%; height: 520px; border: 2px solid #e0e0e0; border-radius: 8px; }
.dv-geo-consignes { margin: 8px 0; padding-left: 20px; }
.dv-geo-consignes li.ok { color: #155724; }
.dv-geo-consignes li.ok::after { content: attr(data-fait) ' ✅'; }
.dv-geo-consignes li.ko { color: #721c24; }
.dv-geo-consignes li.ko::after { content: attr(data-fait) ' ❌'; }
.dv-geo-apercu { max-width: 100%; border: 1px solid #e8e8f5; border-radius: 8px; background: #fff; }
.dv-num { width: 56px; padding: 4px; border: 2px solid #e0e0e0; border-radius: 6px; }
.dv-programme { margin: 8px 0; padding-left: 22px; font-size: 13px; line-height: 1.5; }