:root{
  --bg:#050505;
  --surface:rgba(15,15,20,0.6);
  --surface-2:rgba(255,255,255,0.025);
  --surface-3:rgba(255,255,255,0.045);

  --text:#ffffff;
  --text-2:rgba(255,255,255,0.72);
  --text-3:rgba(255,255,255,0.5);
  --text-4:rgba(255,255,255,0.32);

  --violet:#7c3aed;
  --violet-hover:#8b5cf6;
  --violet-soft:#a78bfa;
  --violet-glow:rgba(124,58,237,0.4);

  --danger:#f87171;
  --danger-bg:rgba(248,113,113,0.08);
  --danger-border:rgba(248,113,113,0.3);

  --success:#34d399;
  --success-bg:rgba(52,211,153,0.08);
  --success-border:rgba(52,211,153,0.3);

  --warn:#fbbf24;
  --info:#60a5fa;

  --border:rgba(255,255,255,0.08);
  --border-2:rgba(255,255,255,0.14);
  --border-strong:rgba(255,255,255,0.2);

  --radius-xl:24px;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:10px;

  --shadow-card:0 30px 80px -20px rgba(0,0,0,0.65), 0 0 0 1px var(--border);

  --ease:cubic-bezier(.4,0,.2,1);
  --transition:160ms var(--ease);
}

*{
  margin:0;
  padding:0;
  box-sizing:border-box;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

html,
body{
  min-height:100%;
}

body.auth-body{
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  background:
    radial-gradient(1100px 600px at 18% -10%, rgba(124,58,237,0.16), transparent 55%),
    radial-gradient(900px 500px at 85% -5%, rgba(91,33,182,0.12), transparent 50%),
    radial-gradient(700px 500px at 50% 110%, rgba(124,58,237,0.08), transparent 60%),
    var(--bg);
  /* Pas de background-attachment:fixed : sur iOS Safari il casse le rendu et
     transforme les éléments backdrop-filter (la carte) en blocs NOIRS. */
  color:var(--text);
  min-height:100vh;
  overflow-x:hidden;
}

button,
input{
  font:inherit;
  color:inherit;
}

button{
  border:0;
  background:none;
  cursor:pointer;
  -webkit-tap-highlight-color:transparent;
}

a{
  color:inherit;
  text-decoration:none;
}

input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus{
  -webkit-text-fill-color:var(--text);
  -webkit-box-shadow:0 0 0 1000px rgba(20,20,26,0.95) inset;
  box-shadow:0 0 0 1000px rgba(20,20,26,0.95) inset;
  caret-color:var(--text);
  transition:background-color 9999s ease-out, color 9999s ease-out;
}

.auth-page{
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:120px 24px 60px;
}

.auth-card{
  width:100%;
  max-width:460px;
  /* Fond quasi opaque : si le backdrop-filter est buggé/ignoré (iOS Safari),
     la carte reste un panneau lisible au lieu d'un bloc noir. */
  background:rgba(16,16,22,0.92);
  border:1px solid var(--border);
  border-radius:var(--radius-xl);
  box-shadow:var(--shadow-card);
  /* Pas de backdrop-filter ici : c'est l'élément critique (le formulaire) et
     sur iOS Safari le backdrop-filter peut le rendre entièrement NOIR. Le fond
     opaque ci-dessus donne le même rendu visuel sans le risque. */
  padding:44px 40px 36px;
  position:relative;
  overflow:hidden;
  /* Intro 100% CSS : l'état au repos est visible. Si l'animation ne joue
     pas (Safari/iOS, onglet en arrière-plan, JS cassé), la carte reste
     affichée — elle ne peut jamais rester noire/invisible. */
  animation:auth-card-in 0.55s cubic-bezier(.16,1,.3,1);
}

@keyframes auth-card-in{
  from{opacity:0; transform:translateY(16px);}
  to{opacity:1; transform:translateY(0);}
}

.auth-card::before{
  content:"";
  position:absolute;
  top:0;
  left:50%;
  transform:translateX(-50%);
  width:60%;
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(167,139,250,0.4), transparent);
  pointer-events:none;
}

.auth-header{
  margin-bottom:28px;
}

.auth-header h1{
  font-size:1.72rem;
  font-weight:700;
  line-height:1.15;
  letter-spacing:-0.025em;
  color:var(--text);
  margin-bottom:8px;
}

.auth-header p{
  font-size:0.92rem;
  line-height:1.5;
  color:var(--text-3);
  font-weight:400;
}

.auth-form{
  display:flex;
  flex-direction:column;
  gap:18px;
}

.form-field{
  display:flex;
  flex-direction:column;
  gap:7px;
}

.form-field label{
  font-size:0.78rem;
  font-weight:600;
  color:var(--text-2);
}

.form-field input{
  width:100%;
  height:48px;
  padding:0 16px;
  background:var(--surface-2);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  color:var(--text);
  font-size:0.95rem;
  font-weight:500;
  outline:none;
  transition:border-color var(--transition), background-color var(--transition), box-shadow var(--transition);
}

.form-field input::placeholder{
  color:var(--text-4);
  font-weight:400;
}

.form-field input:hover{
  border-color:var(--border-2);
  background:var(--surface-3);
}

.form-field input:focus{
  border-color:rgba(167,139,250,0.55);
  background:var(--surface-3);
  box-shadow:0 0 0 3px rgba(124,58,237,0.18);
}

.form-field input.has-error{
  border-color:rgba(248,113,113,0.5);
  box-shadow:0 0 0 3px rgba(248,113,113,0.12);
}

.field-hint{
  display:none;
  font-size:0.76rem;
  font-weight:500;
  color:var(--text-3);
  margin-top:1px;
}

.field-hint.is-active{
  display:block;
}

.field-hint.is-error{
  color:#fca5a5;
}

.field-hint.is-success{
  color:#6ee7b7;
}

.input-wrap{
  position:relative;
}

.input-wrap input{
  padding-right:48px;
}

.input-toggle{
  position:absolute;
  top:50%;
  right:6px;
  transform:translateY(-50%);
  width:38px;
  height:38px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:9px;
  color:var(--text-3);
  transition:color var(--transition), background-color var(--transition);
}

.input-toggle:hover{
  color:var(--text);
  background:rgba(255,255,255,0.04);
}

.input-toggle svg{
  width:18px;
  height:18px;
}

.input-toggle .icon-eye-off{
  display:none;
}

.input-toggle.is-visible .icon-eye{
  display:none;
}

.input-toggle.is-visible .icon-eye-off{
  display:block;
}

.strength-meter{
  display:flex;
  align-items:center;
  gap:10px;
  margin-top:4px;
}

.strength-bars{
  display:flex;
  gap:4px;
  flex:1;
}

.strength-bars span{
  flex:1;
  height:3px;
  border-radius:2px;
  background:var(--border);
  transition:background-color var(--transition);
}

.strength-meter[data-strength="1"] .strength-bars span:nth-child(-n+1){background:#f87171;}
.strength-meter[data-strength="2"] .strength-bars span:nth-child(-n+2){background:#fbbf24;}
.strength-meter[data-strength="3"] .strength-bars span:nth-child(-n+3){background:#a3e635;}
.strength-meter[data-strength="4"] .strength-bars span{background:#34d399;}

.strength-label{
  font-size:0.72rem;
  font-weight:600;
  color:var(--text-4);
  white-space:nowrap;
  min-width:90px;
  text-align:right;
}

.strength-meter[data-strength="1"] .strength-label{color:#fca5a5;}
.strength-meter[data-strength="2"] .strength-label{color:#fcd34d;}
.strength-meter[data-strength="3"] .strength-label{color:#bef264;}
.strength-meter[data-strength="4"] .strength-label{color:#6ee7b7;}

.form-checkbox{
  display:flex;
  align-items:flex-start;
  gap:10px;
  cursor:pointer;
  user-select:none;
  font-size:0.84rem;
  line-height:1.5;
  color:var(--text-3);
  padding:2px 0;
}

.form-checkbox input{
  position:absolute;
  opacity:0;
  pointer-events:none;
}

.checkbox-mark{
  flex-shrink:0;
  width:18px;
  height:18px;
  margin-top:1px;
  border-radius:5px;
  background:var(--surface-2);
  border:1.5px solid var(--border-2);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:transparent;
  transition:background-color var(--transition), border-color var(--transition), color var(--transition);
}

.checkbox-mark svg{
  width:11px;
  height:11px;
}

.form-checkbox:hover .checkbox-mark{
  border-color:var(--border-strong);
}

.form-checkbox input:focus-visible + .checkbox-mark{
  box-shadow:0 0 0 3px rgba(124,58,237,0.25);
}

.form-checkbox input:checked + .checkbox-mark{
  background:var(--violet);
  border-color:var(--violet);
  color:#fff;
}

.checkbox-text a{
  color:var(--text-2);
  text-decoration:underline;
  text-underline-offset:2px;
  text-decoration-color:rgba(167,139,250,0.4);
}

.checkbox-text a:hover{
  color:var(--text);
  text-decoration-color:var(--violet-soft);
}

.alert{
  display:none;
  padding:11px 13px;
  border-radius:var(--radius-sm);
  font-size:0.84rem;
  font-weight:500;
  line-height:1.4;
  border:1px solid transparent;
}

.alert.is-active{
  display:block;
}

.alert:not(.is-success){
  background:var(--danger-bg);
  border-color:var(--danger-border);
  color:#fca5a5;
}

.alert.is-success{
  background:var(--success-bg);
  border-color:var(--success-border);
  color:#6ee7b7;
}

.btn{
  position:relative;
  width:100%;
  height:48px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:9px;
  border-radius:var(--radius-md);
  font-size:0.92rem;
  font-weight:600;
  letter-spacing:-0.005em;
  cursor:pointer;
  transition:transform 100ms var(--ease), background-color var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition);
  user-select:none;
}

.btn-label,
.btn-spinner{
  display:inline-flex;
  align-items:center;
  justify-content:center;
}

.btn-spinner{
  display:none;
  width:18px;
  height:18px;
  border-radius:50%;
  border:2px solid rgba(255,255,255,0.32);
  border-top-color:#fff;
  animation:btn-spin 700ms linear infinite;
}

.btn.is-loading .btn-label{
  opacity:0.6;
}

.btn.is-loading .btn-spinner{
  display:inline-block;
}

@keyframes btn-spin{
  to{transform:rotate(360deg);}
}

.btn-primary{
  background:var(--violet);
  color:#fff;
  box-shadow:0 1px 0 rgba(255,255,255,0.08) inset, 0 8px 24px -8px var(--violet-glow);
}

.btn-primary:hover:not(:disabled){
  background:var(--violet-hover);
  box-shadow:0 1px 0 rgba(255,255,255,0.12) inset, 0 12px 30px -10px var(--violet-glow);
}

.btn-primary:active:not(:disabled){
  transform:scale(0.99);
}

.btn-primary:disabled{
  background:rgba(124,58,237,0.32);
  color:rgba(255,255,255,0.55);
  cursor:not-allowed;
  box-shadow:none;
}

.auth-footer{
  margin-top:28px;
  padding-top:24px;
  border-top:1px solid var(--border);
  font-size:0.88rem;
  color:var(--text-3);
  text-align:center;
}

.auth-footer a{
  color:var(--text);
  font-weight:600;
  margin-left:4px;
  position:relative;
}

.auth-footer a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-2px;
  width:100%;
  height:1px;
  background:currentColor;
  transform:scaleX(0);
  transform-origin:left;
  transition:transform var(--transition);
}

.auth-footer a:hover::after{
  transform:scaleX(1);
}

@media(max-width:520px){
  .auth-page{
    padding:108px 16px 40px;
    align-items:flex-start;
  }

  .auth-card{
    padding:34px 24px 28px;
    border-radius:18px;
  }

  .auth-header h1{
    font-size:1.5rem;
  }
}

@media(max-width:380px){
  .auth-card{
    padding:28px 18px 24px;
  }

  .strength-label{
    min-width:80px;
    font-size:0.68rem;
  }
}

@media(max-height:680px) and (orientation:landscape){
  .auth-page{
    padding:90px 24px 30px;
    align-items:flex-start;
  }

  .auth-card{
    max-width:540px;
    padding:32px 36px 26px;
  }

  .auth-header{
    margin-bottom:22px;
  }

  .auth-header h1{
    font-size:1.5rem;
  }

  .auth-form{
    gap:14px;
  }

  .form-field input,
  .btn{
    height:44px;
  }
}

@media(min-width:1280px){
  .auth-card{
    max-width:480px;
    padding:48px 44px 40px;
  }

  .auth-header h1{
    font-size:1.85rem;
  }
}

@media(hover:none) and (pointer:coarse){
  .btn-primary:hover,
  .input-toggle:hover{
    transform:none;
  }
}

@media(prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:0.01ms !important;
    transition-duration:0.01ms !important;
  }
}