body {
  -ms-overflow-style: none;
}
 
::-webkit-scrollbar {
  display: none;
}

    .login-container {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(180deg, #f9fafb 0%, #ffffff 50%, #f9fafb 100%);
      padding: 40px 24px;
      position: relative;
      overflow: hidden;
    }

    /* 배경 그라디언트 요소 */
    .login-container::before {
      content: '';
      position: absolute;
      top: -50%;
      left: -50%;
      width: 200%;
      height: 200%;
      background: radial-gradient(circle at 30% 50%, rgba(0, 0, 0, 0.02) 0%, transparent 50%),
                  radial-gradient(circle at 70% 50%, rgba(0, 0, 0, 0.015) 0%, transparent 50%);
      animation: gradientMove 20s ease-in-out infinite;
      pointer-events: none;
    }

    @keyframes gradientMove {
      0%, 100% { transform: translate(0, 0) rotate(0deg); }
      50% { transform: translate(-5%, 5%) rotate(5deg); }
    }

    .login-card {
      background: rgba(255, 255, 255, 0.9);
      backdrop-filter: blur(40px) saturate(180%);
      -webkit-backdrop-filter: blur(40px) saturate(180%);
      border-radius: 28px;
      padding: 56px 48px;
      box-shadow: 0 8px 40px rgba(0, 0, 0, 0.08);
      width: 100%;
      max-width: 460px;
      border: 1px solid rgba(255, 255, 255, 0.5);
      position: relative;
      z-index: 1;
      animation: slideUpFade 0.6s cubic-bezier(0.4, 0, 0.2, 1);
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }

    @keyframes slideUpFade {
      from {
        opacity: 0;
        transform: translateY(30px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .login-header {
      text-align: center;
      margin-bottom: 48px;
    }

    .login-title {
      font-size: 32px;
      font-weight: 800;
      color: #191f28;
      margin-bottom: 12px;
      letter-spacing: -1px;
      line-height: 1.2;
    }

    .login-subtitle {
      font-size: 16px;
      color: #4e5968;
      font-weight: 600;
      letter-spacing: -0.3px;
    }

    .form-group {
      margin-bottom: 28px;
    }

    .form-group:last-of-type {
      margin-bottom: 40px;
    }

    /* OTP 필드 애니메이션 */
    #otp-field {
      max-height: 0;
      overflow: hidden;
      opacity: 0;
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
      margin-bottom: 0;
    }

    #otp-field.show {
      max-height: 200px;
      opacity: 1;
      margin-bottom: 28px;
    }

    .login-button {
      width: 100%;
      padding: 20px;
      font-size: 18px;
      font-weight: 800;
      margin-top: 16px;
      letter-spacing: -0.5px;
      border-radius: 14px;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .login-button:hover:not(:disabled) {
      transform: translateY(-3px);
      box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
    }

    .login-button:active:not(:disabled) {
      transform: translateY(-1px);
    }

    .form-footer {
      margin-top: 32px;
      text-align: center;
      font-size: 15px;
      color: #4e5968;
      font-weight: 600;
      padding-top: 32px;
      border-top: 1px solid rgba(0, 0, 0, 0.06);
    }

    .form-footer a {
      color: #191f28;
      text-decoration: none;
      font-weight: 700;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      padding: 4px 8px;
      border-radius: 6px;
    }

    .form-footer a:hover {
      background-color: rgba(0, 0, 0, 0.04);
    }

    /* OTP 필드 스타일 */
    #otp-token {
      text-align: center;
      font-size: 24px;
      letter-spacing: 8px;
      font-weight: 700;
      font-variant-numeric: tabular-nums;
      padding: 20px;
    }

    #otp-token::placeholder {
      letter-spacing: 8px;
    }

    /* 반응형 */
    @media (max-width: 768px) {
      .login-card {
        padding: 40px 32px;
        border-radius: 24px;
      }

      .login-title {
        font-size: 28px;
      }

      .login-subtitle {
        font-size: 15px;
      }
    }