@font-face {
  font-family:'sans';
  src: url(../fonts/IRANSansWeb.woff2);
}
body {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      font-family: 'sans';
      scroll-behavior: smooth;
      background-position: 0% 0%;
      background-size: cover;
      background-color: var(--theme-palette-color-7);
      background-image: url("../img/back.png");
    }
    .auth-card {
      width: 100%;
      max-width: 460px;
      background: rgba(30, 41, 59, 0.7);
      backdrop-filter: blur(15px);
      -webkit-backdrop-filter: blur(15px);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 24px;
      padding: 40px 30px;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
      text-align: center;
    }
    .auth-logo {
      font-size: 2.5rem;
      font-weight: 800;
      background: linear-gradient(90deg, #22d3ee, #a855f7);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 10px;
      display: inline-block;
    }
    .form-control {
      background: rgba(15, 23, 42, 0.6);
      border: 1px solid rgba(255, 255, 255, 0.1);
      color: #fff !important;
      padding: 12px 15px;
      border-radius: 12px;
      margin-bottom: 20px;
      text-align: center;
      
    }
    .form-control:focus {
      background: rgba(15, 23, 42, 0.8);
      border-color: #22d3ee;
      color: #fff;
      box-shadow: 0 0 10px rgba(34, 211, 238, 0.2);
    }
    .form-control::placeholder {
      color: #94a3b8 !important; 
      opacity: 1 !important;
    }
    .grade-selector {
      display: flex;
      justify-content: center;
      gap: 10px;
      margin-bottom: 25px;
    }
    .grade-selector input[type="radio"] {
      display: none;
    }
  
    .grade-selector label {
      flex: 1;
      padding: 10px;
      background: rgba(15, 23, 42, 0.6);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 12px;
      color: #94a3b8;
      cursor: pointer;
      transition: all 0.3s ease;
      font-size: 0.95rem;
    }
    .grade-selector input[type="radio"]:checked + label {
      background: linear-gradient(135deg, #22d3ee, #a855f7);
      color: #fff;
      border-color: transparent;
      box-shadow: 0 5px 15px rgba(168, 85, 247, 0.3);
      font-weight: bold;
    }

    .grade-selector label:hover {
      border-color: #22d3ee;
      color: #fff;
    }
    .btn-continue {
      width: 100%;
      padding: 12px;
      background: linear-gradient(135deg, #22d3ee, #a855f7);
      border: none;
      border-radius: 12px;
      color: #fff;
      font-weight: bold;
      font-size: 1.1rem;
      transition: transform 0.3s;
      margin-top: 10px;
    }
    .btn-continue:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 25px rgba(168, 85, 247, 0.4);
    }
    .text {
      color: rgba(240, 255, 255, 0.719);
    }
  
    .login-link {
      color: #22d3ee;
      text-decoration: none;
      font-weight: bold;
      transition: color 0.3s;
    }
    .login-link:hover {
      color: #a855f7;
      text-decoration: underline;
    }
    @media (max-width: 500px){
      .auth-card {
        margin: 15px 15px;
      }   
    }