:root{
  --ink:#0f2540;--muted:#5b6b86;--line:#dbe6f2;--bg:#f4f8fc;
  --blue:#1a72b0;--blue-d:#0e5390;--blue-l:#eef6fc;--teal:#0d9488;--red:#e25563;
  --radius:14px;--shadow:0 8px 30px rgba(20,60,100,.10);
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--blue)}
.navbar{background:linear-gradient(135deg,#0e5390,#1a72b0 60%,#2b8ed0);color:#fff;padding:14px 22px;display:flex;align-items:center;justify-content:space-between}
.navbar-brand{color:#fff;font-weight:800;text-decoration:none;font-size:16px}
.navbar .right{font-size:13px;color:rgba(255,255,255,.9)}
.navbar .right a{color:#fff;text-decoration:underline;margin-left:10px}
.hero{background:linear-gradient(135deg,#0e5390,#1a72b0 55%,#2b8ed0);color:#fff;padding:44px 22px;text-align:center}
.hero h1{margin:0 0 8px;font-size:26px;font-weight:800}
.hero p{margin:0;color:rgba(255,255,255,.92)}
.container{max-width:640px;margin:0 auto;padding:28px 18px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px}
label.field{display:block;margin-bottom:18px}
label.field span{display:block;font-weight:700;margin-bottom:6px;font-size:14px}
input[type=email],input[type=password],input[type=text]{width:100%;padding:12px 14px;border:2px solid var(--line);border-radius:10px;font-size:16px;outline:none}
input:focus{border-color:var(--blue)}
.btn{width:100%;background:var(--blue);color:#fff;border:none;padding:14px 24px;border-radius:11px;font-size:16px;font-weight:700;cursor:pointer;transition:.15s}
.btn:hover{background:var(--blue-d)}
.btn:disabled{opacity:.6;cursor:not-allowed}
.btn-ghost{background:#fff;color:var(--blue);border:1px solid var(--line)}
.alert{padding:13px 16px;border-radius:10px;margin:14px 0;font-size:14px}
.alert.err{background:#fdecee;border:1px solid #f3c9ce;color:#a12630}
.alert.ok{background:#ecfdf5;border:1px solid #bfe9dd;color:#0a6b52}
.alert.info{background:var(--blue-l);border:1px solid #c9e2f2;color:var(--blue-d)}
.drop{border:2px dashed var(--line);border-radius:14px;padding:34px 20px;text-align:center;background:#fbfdff;cursor:pointer;transition:.15s}
.drop:hover{border-color:var(--blue);background:var(--blue-l)}
.drop .ic{font-size:40px}
.drop p{margin:8px 0 0;color:var(--muted);font-size:14px}
.preview{margin-top:16px;text-align:center}
.preview img{max-width:100%;max-height:280px;border-radius:12px;border:1px solid var(--line)}
.result{margin-top:22px}
.devis{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:0 2px 10px rgba(15,40,80,.05)}
.devis h3{margin:0;padding:14px 18px;background:var(--blue-d);color:#fff;font-size:16px}
.devis table{width:100%;border-collapse:collapse;font-size:14px}
.devis th,.devis td{padding:10px 16px;text-align:left;border-top:1px solid var(--line)}
.devis th{background:var(--blue-l);color:var(--blue-d);font-weight:700}
.devis td.num{text-align:right;white-space:nowrap}
.devis tfoot td{font-weight:800;background:#f8fbfe;border-top:2px solid var(--line)}
.muted{color:var(--muted);font-size:13px}
.spin{display:inline-block;width:18px;height:18px;border:3px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;animation:sp .7s linear infinite;vertical-align:-3px;margin-right:8px}
@keyframes sp{to{transform:rotate(360deg)}}
.footer{text-align:center;padding:26px 18px;color:var(--muted);font-size:12px;border-top:1px solid var(--line);background:#fff;margin-top:40px}
.badge{display:inline-block;background:var(--blue-l);color:var(--blue-d);font-size:11px;font-weight:700;padding:3px 10px;border-radius:999px}
/* Impression / export PDF : ne garder que le résultat (diagnostic + devis) */
@media print{
  body{background:#fff}
  body *{visibility:hidden}
  #result, #result *{visibility:visible}
  #result{position:absolute;left:0;top:0;width:100%}
  .no-print{display:none !important}
  .devis{box-shadow:none;border:1px solid #ccc;page-break-inside:avoid}
  .alert{border:1px solid #ccc}
}