.login-wrapper {
      display: flex;
      min-height: 100vh;
      width: 100%;
      background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
      align-items: center;
      justify-content: center;
      position: absolute;
      top: 0;
      left: 0;
      z-index: 1000;
    }

    body.auth-pending .login-wrapper,
    body.auth-pending .app {
      display: none !important;
    }

    .login-tabs {
      display: flex;
      gap: 8px;
      margin-bottom: 18px;
    }

    .login-tab {
      flex: 1;
      border: 1px solid var(--border);
      background: #fff;
      color: var(--text);
      border-radius: 8px;
      padding: 10px;
      font-weight: 700;
      cursor: pointer;
    }

    .login-tab.active {
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
    }

    .login-card {
      background: #fff;
      padding: 40px;
      border-radius: 16px;
      width: 100%;
      max-width: 420px;
      box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
      position: relative;
      overflow: hidden;
    }

    .login-header {
      text-align: center;
      margin-bottom: 30px;
    }

    .login-icon {
      width: 56px;
      height: 56px;
      background: linear-gradient(135deg, var(--primary-light), #7c3aed);
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }

    .login-title {
      font-size: 24px;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.02em;
    }

    .login-subtitle {
      font-size: 13px;
      color: var(--muted);
      margin-top: 4px;
    }

    .login-form-group {
      margin-bottom: 20px;
    }

    .login-form-group label {
      display: block;
      font-size: 12px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 8px;
    }

    .login-input {
      width: 100%;
      padding: 12px 16px;
      border: 1.5px solid var(--border);
      border-radius: 10px;
      font-size: 14px;
      transition: all 0.2s;
    }

    .login-input:focus {
      border-color: var(--primary-light);
      box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
      outline: none;
    }

    .login-btn {
      width: 100%;
      padding: 14px;
      background: linear-gradient(135deg, var(--primary-light), #3b82f6);
      color: #fff;
      border: none;
      border-radius: 10px;
      font-size: 15px;
      font-weight: 700;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
      transition: all 0.2s;
    }

    .login-btn:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(37, 99, 235, 0.4);

    }

    /* Card-level login preloader styling */
    .login-preloader {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(4px);
      z-index: 100;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      border-radius: 16px;
      animation: fadeInPreloader 0.3s ease;
    }

    @keyframes fadeInPreloader {
      from { opacity: 0; }
      to { opacity: 1; }
    }

    .preloader-spinner {
      width: 44px;
      height: 44px;
      border: 4px solid #e2e8f0;
      border-top-color: var(--primary-light);
      border-radius: 50%;
      animation: spinPreloader 0.8s linear infinite;
      margin-bottom: 16px;
    }

    @keyframes spinPreloader {
      to { transform: rotate(360deg); }
    }

    .preloader-text {
      font-size: 14px;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.01em;
      animation: pulseText 1.5s ease-in-out infinite;
    }

    @keyframes pulseText {
      0%, 100% { opacity: 0.6; }
      50% { opacity: 1; }
    }

    /* Student registration wizard back and next buttons styling */
    #self-reg-prev-btn, #self-reg-next-btn {
      padding: 12px 20px;
      font-size: 14px;
      font-weight: 700;
      border-radius: 10px;
      min-height: 46px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      flex: 1;
      transition: all 0.2s ease;
    }

    #self-reg-prev-btn {
      border: 1.5px solid var(--border);
      background: #ffffff;
      color: var(--text);
    }

    #self-reg-prev-btn:hover {
      background: #f8fafc;
      border-color: #cbd5e1;
    }

    #self-reg-next-btn {
      background: linear-gradient(135deg, var(--primary-light), #3b82f6);
      color: #ffffff;
      border: none;
      box-shadow: 0 4px 10px rgba(37, 99, 235, 0.2);
    }

    #self-reg-next-btn:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 14px rgba(37, 99, 235, 0.3);
    }