:root {
  --primary: #1e40af;
  --bg: #f8fafc;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --danger: #dc2626;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, Segoe UI, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}
a { color: inherit; text-decoration: none; }
.container { max-width: 1100px; margin: 0 auto; padding: 20px; }
.topbar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { font-weight: 700; color: var(--primary); }
.nav { display: flex; gap: 10px; flex-wrap: wrap; }
.nav a {
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
}
.nav a.active { border-color: var(--primary); color: var(--primary); }
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  margin-bottom: 16px;
}
h1 { font-size: 26px; margin: 0 0 14px; }
h2 { font-size: 20px; margin: 0 0 12px; }
.grid { display: grid; gap: 12px; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.label { display: block; font-weight: 600; margin-bottom: 6px; }
input, select, textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  font-size: 14px;
}
textarea { min-height: 120px; resize: vertical; }
.btn {
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 600;
}
.btn-sm {
  padding: 7px 12px;
  font-size: 13px;
  border-radius: 7px;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-secondary { background: #fff; border-color: var(--border); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-success { background: #16a34a; color: #fff; }
.btn-icon {
  width: 30px;
  height: 30px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  line-height: 1;
}
.flash { padding: 10px 12px; border-radius: 8px; margin-bottom: 14px; }
.flash.success { background: #dcfce7; color: #166534; }
.flash.error { background: #fee2e2; color: #991b1b; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px; border-bottom: 1px solid var(--border); font-size: 14px; }
.badge { font-size: 12px; padding: 4px 8px; border-radius: 999px; display: inline-block; }
.badge.ouvert { background: #e2e8f0; color: #334155; }
.badge.en_cours { background: #dbeafe; color: #1d4ed8; }
.badge.resolu { background: #f3e8ff; color: #7e22ce; }
.badge.ferme { background: #dcfce7; color: #166534; }
.badge.basse { background: #dcfce7; color: #166534; }
.badge.normale { background: #dbeafe; color: #1d4ed8; }
.badge.haute { background: #ffedd5; color: #9a3412; }
.badge.urgente { background: #fee2e2; color: #991b1b; }
.chat-box { max-height: 360px; overflow: auto; border: 1px solid var(--border); border-radius: 8px; padding: 10px; background: #f8fafc; }
.msg { margin-bottom: 10px; padding: 8px 10px; border-radius: 8px; background: #fff; border: 1px solid var(--border); }
.msg small { color: var(--muted); display: block; margin-top: 4px; }
.attachment-list { display: grid; gap: 8px; }
.attachment-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.attachment-item {
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  background: #fff;
  flex: 1;
}
.attachment-item:hover { border-color: var(--primary); }
.attachment-ext {
  min-width: 54px;
  text-align: center;
  font-weight: 700;
  font-size: 12px;
  padding: 6px 8px;
  border-radius: 8px;
  background: #e0e7ff;
  color: #1e3a8a;
}
.attachment-meta { display: flex; flex-direction: column; min-width: 0; }
.attachment-meta strong { font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.attachment-meta small { color: var(--muted); margin-top: 3px; }
.attachment-delete-form { margin: 0; }
.muted { color: var(--muted); }
.error-text { color: #b91c1c; font-size: 13px; margin-top: 4px; }
.actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.admin-actions { display: inline-flex; align-items: center; gap: 8px; }
.action-form { margin: 0; }
.auth-wrap { max-width: 460px; margin: 40px auto; }
@media (max-width: 900px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}