:root{
  --red:#d71920;
  --red-dark:#a90f14;
  --anthracite:#262626;
  --gray:#f2f2f2;
  --gray-2:#e2e2e2;
  --text:#222;
  --white:#fff;
  --green:#16794c;
  --orange:#c66a00;
  --danger:#b30000;
  --shadow:0 8px 24px rgba(0,0,0,.08);
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family:Arial,Helvetica,sans-serif;
  background:var(--gray);
  color:var(--text);
}
.topbar{
  background:var(--anthracite);
  color:#fff;
  padding:18px 24px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  border-bottom:6px solid var(--red);
}
.brand{
  font-weight:900;
  letter-spacing:2px;
  color:var(--red);
  font-size:24px;
}
h1{margin:4px 0 0;font-size:22px}
.truck-icon{font-size:40px}
.container{max-width:1100px;margin:24px auto;padding:0 16px}
.tabs{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:8px;
  margin-bottom:18px;
}
.tab{
  border:none;
  padding:13px 10px;
  border-radius:10px;
  background:#fff;
  font-weight:700;
  cursor:pointer;
  box-shadow:var(--shadow);
}
.tab.active{background:var(--red);color:#fff}
.view{display:none}
.view.active{display:block}
.card{
  background:#fff;
  border-radius:16px;
  padding:20px;
  box-shadow:var(--shadow);
  margin-bottom:20px;
}
h2{margin:0 0 6px;color:var(--anthracite)}
h3{margin-top:26px}
.subtitle{color:#666;margin:0 0 18px}
.grid.two{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
}
.full{grid-column:1/-1}
.field label{display:block;font-weight:700;margin-bottom:6px}
input,select{
  width:100%;
  min-height:44px;
  padding:10px 12px;
  border:1px solid #cfcfcf;
  border-radius:9px;
  background:#fff;
  font-size:15px;
}
.materials-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:12px;
  margin-bottom:18px;
}
.material-row{
  border:1px solid var(--gray-2);
  border-radius:10px;
  padding:12px;
  display:grid;
  grid-template-columns:1fr 90px;
  gap:12px;
  align-items:center;
}
.material-row label{font-weight:700}
.primary-btn,.secondary-btn,.danger-btn{
  border:none;
  border-radius:9px;
  padding:11px 16px;
  font-weight:800;
  cursor:pointer;
}
.primary-btn{background:var(--red);color:#fff}
.primary-btn:hover{background:var(--red-dark)}
.secondary-btn{background:var(--anthracite);color:#fff}
.danger-btn{background:#fff0f0;color:var(--danger);border:1px solid #efb4b4}
#save-movement{width:100%;font-size:16px}
.message{margin-top:12px;font-weight:700}
.message.success{color:var(--green)}
.message.error{color:var(--danger)}
.section-head{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:12px;
}
.stock-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:14px;
  margin-top:16px;
}
.stock-card{
  border-radius:14px;
  padding:16px;
  border-left:8px solid var(--green);
  background:#f6fff9;
}
.stock-card.alerte{border-left-color:var(--orange);background:#fff8ed}
.stock-card.rupture{border-left-color:var(--danger);background:#fff1f1}
.stock-card h3{margin:0 0 10px}
.stock-values{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:8px;
  text-align:center;
}
.stock-values span{display:block;color:#666;font-size:12px}
.stock-values strong{font-size:20px}
.alert-box{
  background:#fff3e3;
  border:1px solid #efbc71;
  color:#7c4100;
  padding:14px;
  border-radius:10px;
  margin-top:14px;
  font-weight:700;
}
.filters{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  gap:8px;
  margin:16px 0;
}
.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse;min-width:760px}
th,td{padding:10px;border-bottom:1px solid #ddd;text-align:left}
th{background:var(--anthracite);color:#fff}
.management-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}
.full-card{grid-column:1/-1}
.inline-form{
  display:grid;
  grid-template-columns:1fr auto;
  gap:8px;
  margin:14px 0;
}
.material-form{
  display:grid;
  grid-template-columns:2fr 1fr 1fr auto;
  gap:8px;
  margin:14px 0;
}
.admin-list{display:flex;flex-direction:column;gap:8px}
.admin-item{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:8px;
  padding:10px 12px;
  border:1px solid #ddd;
  border-radius:9px;
}
.modal{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,.6);
  display:grid;
  place-items:center;
  z-index:1000;
  padding:16px;
}
.modal.hidden{display:none}
.modal-box{
  width:min(420px,100%);
  background:#fff;
  border-radius:16px;
  padding:22px;
  box-shadow:var(--shadow);
}
.modal-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:14px}
footer{
  background:var(--anthracite);
  color:#fff;
  text-align:center;
  padding:18px;
  border-top:5px solid var(--red);
}
@media(max-width:780px){
  .tabs{grid-template-columns:repeat(2,1fr)}
  .grid.two,.materials-grid,.stock-grid,.management-grid{grid-template-columns:1fr}
  .filters{grid-template-columns:1fr}
  .material-form{grid-template-columns:1fr}
  .full-card{grid-column:auto}
}