:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --danger: #b91c1c;
  --border: #e2e8f0;
  --radius: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.45;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: #0f172a;
  color: #fff;
}
.topbar h1 { margin: 0; font-size: 1.1rem; letter-spacing: 0.5px; }
.user-zone { display: flex; gap: 12px; align-items: center; font-size: 0.9rem; }
.user-zone .btn-link { color: #cbd5e1; }

main#app {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px;
}

.screen { display: block; }
.screen[hidden] { display: none; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin: 12px 0;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

h2 { margin: 8px 0 12px; font-size: 1.25rem; }
h3 { margin: 4px 0 8px; font-size: 1.05rem; }

.muted { color: var(--muted); }
.error { color: var(--danger); margin-top: 8px; }

form label {
  display: block;
  margin: 8px 0;
  font-size: 0.9rem;
  color: var(--muted);
}
form input[type="text"] {
  display: block;
  width: 100%;
  margin-top: 4px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  background: #fff;
  color: var(--text);
}
form input[type="text"]:focus { outline: 2px solid var(--accent); border-color: var(--accent); }

.btn-primary {
  display: inline-block;
  padding: 10px 16px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:disabled { background: #94a3b8; cursor: not-allowed; }

.btn-link {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  text-decoration: underline;
  padding: 0;
  font-size: 0.95rem;
}
.btn-link:hover { color: var(--accent-hover); }

.vehicule-list { list-style: none; padding: 0; margin: 12px 0; }
.vehicule-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: border-color 0.15s ease;
}
.vehicule-item:hover { border-color: var(--accent); }
.veh-title { font-weight: 600; }

.note-big {
  font-size: 2rem;
  font-weight: 700;
  margin: 4px 0;
  color: var(--accent);
}

.list { padding-left: 18px; margin: 8px 0; }
.list li { margin: 4px 0; }

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 0.9rem;
  margin: 12px 0 24px;
}
.data-table th, .data-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}
.data-table th { background: #f1f5f9; }
.data-table tr:last-child td { border-bottom: none; }

@media (max-width: 480px) {
  .topbar h1 { font-size: 1rem; }
  main#app { padding: 12px; }
  .data-table { font-size: 0.8rem; }
}