:root{
  --bg-1: #f6fbff;
  --bg-2: #ffffff;
  --accent-1: #004e87; /* bleu profond */
  --accent-2: #00a9df; /* bleu clair */
  --muted: #6b7280;
  --text: #071428;
  --card-shadow: 0 14px 40px rgba(3,27,57,0.08);
  --glass: rgba(255,255,255,0.7);
  --radius-lg: 16px;
  --radius-sm: 10px;
  --gap: 18px;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Reset léger */
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;background:linear-gradient(180deg,var(--bg-1),#eef7fc);color:var(--text);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}

/* Page centrée */
.auth-page{
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:48px 24px;
}

/* Carte principale */
.auth-card{
  width:100%;
  max-width:520px;
  background:linear-gradient(180deg, rgba(255,255,255,0.96), rgba(250,252,255,0.98));
  border-radius:var(--radius-lg);
  box-shadow:var(--card-shadow);
  padding:34px;
  border:1px solid rgba(6,30,60,0.04);
  backdrop-filter: blur(6px);
}

/* Entête - logo + titre */
.auth-head{
  display:flex;
  align-items:center;
  gap:16px;
  margin-bottom:22px;
}
.brand-logo{
  width:56px;
  height:56px;
  border-radius:12px;
  background:linear-gradient(135deg,var(--accent-1),var(--accent-2));
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:#fff;
  font-weight:700;
  font-size:20px;
  box-shadow: 0 8px 28px rgba(0,80,140,0.12);
  flex:0 0 56px;
}
.auth-head h1{
  font-size:1.2rem;
  font-weight:700;
  margin:0;
}
.auth-head p.lead{
  margin:4px 0 0 0;
  color:var(--muted);
  font-size:0.94rem;
}

/* Formulaire propre et espacé */
.form{
  margin-top:6px;
}
.form-row{
  margin-bottom:14px;
}
label{
  display:block;
  font-size:0.86rem;
  color:var(--muted);
  margin-bottom:8px;
}
.input{
  width:100%;
  padding:12px 14px;
  border-radius:var(--radius-sm);
  border:1px solid rgba(8,20,35,0.06);
  background:#fff;
  color:var(--text);
  font-size:0.97rem;
  transition:box-shadow .12s, border-color .12s, transform .08s;
  -webkit-appearance:none;
}
.input::placeholder{ color:#9aa3b2 }
.input:focus{
  outline:none;
  border-color: rgba(0,130,200,0.9);
  box-shadow:0 10px 30px rgba(0,130,200,0.06);
  transform:translateY(-1px);
}

/* Actions / boutons */
.actions{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:10px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 18px;
  border-radius:12px;
  font-weight:700;
  cursor:pointer;
  border:0;
  font-size:0.95rem;
}
.btn-primary{
  background:linear-gradient(90deg,var(--accent-1),var(--accent-2));
  color:#fff;
  box-shadow: 0 10px 28px rgba(0,120,190,0.14);
  transition:transform .12s, box-shadow .12s;
}
.btn-primary:hover{ transform:translateY(-2px); box-shadow:0 18px 40px rgba(0,120,190,0.16) }
.btn-ghost{
  background:transparent;
  color:var(--accent-1);
  border:1px solid rgba(0,100,160,0.08);
}

/* Footers et aides */
.auth-footer{
  margin-top:18px;
  font-size:0.92rem;
  color:var(--muted);
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:8px;
}
.auth-footer a{ color:var(--accent-1); font-weight:700; }
.auth-footer small{ color:var(--muted) }

/* Messages d'erreur/succès */
.alert{
  padding:10px 12px;
  border-radius:10px;
  font-size:0.92rem;
  margin-bottom:12px;
}
.alert-error{
  background:linear-gradient(180deg, rgba(255,235,235,0.9), rgba(255,244,244,0.95));
  color:#b91c1c;
  border:1px solid rgba(239,68,68,0.12);
}
.alert-success{
  background:linear-gradient(180deg, rgba(237,251,255,0.9), rgba(245,255,255,0.95));
  color:#046e7f;
  border:1px solid rgba(6,182,212,0.12);
}

/* Petite astuce: icône dans le champ mot de passe (si ajouté) */
.input-with-icon{ position:relative; }
.input-with-icon .icon{
  position:absolute;
  right:12px;
  top:50%;
  transform:translateY(-50%);
  color:rgba(10,20,30,0.28);
  font-size:14px;
}

/* Responsive */
@media (max-width:520px){
  .auth-card{ padding:20px; border-radius:12px; }
  .brand-logo{ width:48px; height:48px; font-size:18px }
  .auth-head h1{ font-size:1rem; }
  .actions{ flex-direction:column-reverse; gap:10px; align-items:stretch; }
  .btn{ width:100%; }
  .auth-page{ padding:18px; }
}